Merge changes from topic "perfetto-protolog" into main

* changes:
  Delete unused ShellProtoLogImpl
  Update uses of ProtoLog
  Update ProtoLog build rules
  Perfetto protolog implementation
  Refactor ProtoLogImpl to support Perfetto tracing with flag better
  Update ProtoLogTool
  Update ProtoLogTool commands args
  Update ProtoLog hash function to 64 bit
diff --git a/Android.bp b/Android.bp
index 019bf6508..5ada10d 100644
--- a/Android.bp
+++ b/Android.bp
@@ -386,7 +386,7 @@
         // TODO(b/120066492): remove gps_debug and protolog.conf.json when the build
         // system propagates "required" properly.
         "gps_debug.conf",
-        "protolog.conf.json.gz",
+        "core.protolog.pb",
         "framework-res",
         // any install dependencies should go into framework-minus-apex-install-dependencies
         // rather than here to avoid bloating incremental build time
diff --git a/core/java/Android.bp b/core/java/Android.bp
index 34b8a87..1844215 100644
--- a/core/java/Android.bp
+++ b/core/java/Android.bp
@@ -528,17 +528,6 @@
     ],
 }
 
-// common protolog sources without classes that rely on Android SDK
-filegroup {
-    name: "protolog-common-no-android-src",
-    srcs: [
-        ":protolog-common-src",
-    ],
-    exclude_srcs: [
-        "com/android/internal/protolog/common/ProtoLog.java",
-    ],
-}
-
 // PackageManager common
 filegroup {
     name: "framework-pm-common-shared-srcs",
@@ -548,13 +537,20 @@
     ],
 }
 
+filegroup {
+    name: "protolog-impl",
+    srcs: [
+        "com/android/internal/protolog/ProtoLogImpl.java",
+    ],
+}
+
 java_library {
     name: "protolog-lib",
     platform_apis: true,
     srcs: [
         "com/android/internal/protolog/ProtoLogImpl.java",
         "com/android/internal/protolog/ProtoLogViewerConfigReader.java",
-        ":protolog-common-src",
+        ":perfetto_trace_javastream_protos",
     ],
 }
 
diff --git a/core/java/android/tracing/perfetto/DataSource.java b/core/java/android/tracing/perfetto/DataSource.java
index 4e08aee..d0c719b 100644
--- a/core/java/android/tracing/perfetto/DataSource.java
+++ b/core/java/android/tracing/perfetto/DataSource.java
@@ -18,6 +18,8 @@
 
 import android.util.proto.ProtoInputStream;
 
+import com.android.internal.annotations.VisibleForTesting;
+
 /**
  * Templated base class meant to be derived by embedders to create a custom data
  * source.
@@ -87,7 +89,8 @@
      *
      * NOTE: Should only be called from native side.
      */
-    protected TlsStateType createTlsState(CreateTlsStateArgs<DataSourceInstanceType> args) {
+    @VisibleForTesting
+    public TlsStateType createTlsState(CreateTlsStateArgs<DataSourceInstanceType> args) {
         return null;
     }
 
diff --git a/core/java/android/tracing/perfetto/DataSourceInstance.java b/core/java/android/tracing/perfetto/DataSourceInstance.java
index 3710b4d..904cf55 100644
--- a/core/java/android/tracing/perfetto/DataSourceInstance.java
+++ b/core/java/android/tracing/perfetto/DataSourceInstance.java
@@ -16,6 +16,8 @@
 
 package android.tracing.perfetto;
 
+import com.android.internal.annotations.VisibleForTesting;
+
 /**
  * @hide
  */
@@ -66,7 +68,8 @@
      * Only required to be called when instance was retrieved with
      * `DataSource#getDataSourceInstanceLocked`.
      */
-    public final void release() {
+    @VisibleForTesting
+    public void release() {
         mDataSource.releaseDataSourceInstance(mInstanceIndex);
     }
 
diff --git a/core/java/com/android/internal/protolog/BaseProtoLogImpl.java b/core/java/com/android/internal/protolog/LegacyProtoLogImpl.java
similarity index 81%
rename from core/java/com/android/internal/protolog/BaseProtoLogImpl.java
rename to core/java/com/android/internal/protolog/LegacyProtoLogImpl.java
index abe6c7c..d9ac5a9 100644
--- a/core/java/com/android/internal/protolog/BaseProtoLogImpl.java
+++ b/core/java/com/android/internal/protolog/LegacyProtoLogImpl.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020 The Android Open Source Project
+ * Copyright (C) 2024 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -37,8 +37,11 @@
 import android.util.proto.ProtoOutputStream;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.protolog.common.ILogger;
+import com.android.internal.protolog.common.IProtoLog;
 import com.android.internal.protolog.common.IProtoLogGroup;
 import com.android.internal.protolog.common.LogDataType;
+import com.android.internal.protolog.common.LogLevel;
 import com.android.internal.util.TraceBuffer;
 
 import java.io.File;
@@ -48,52 +51,49 @@
 import java.util.TreeMap;
 import java.util.stream.Collectors;
 
-
 /**
  * A service for the ProtoLog logging system.
  */
-public class BaseProtoLogImpl {
-    protected static final TreeMap<String, IProtoLogGroup> LOG_GROUPS = new TreeMap<>();
+public class LegacyProtoLogImpl implements IProtoLog {
+    private final TreeMap<String, IProtoLogGroup> mLogGroups = new TreeMap<>();
 
-    /**
-     * A runnable to update the cached output of {@link #isEnabled}.
-     *
-     * Must be invoked after every action that could change the result of {@link #isEnabled}, eg.
-     * starting / stopping proto log, or enabling / disabling log groups.
-     */
-    public static Runnable sCacheUpdater = () -> { };
-
-    protected static void addLogGroupEnum(IProtoLogGroup[] config) {
-        for (IProtoLogGroup group : config) {
-            LOG_GROUPS.put(group.name(), group);
-        }
-    }
-
+    private static final int BUFFER_CAPACITY = 1024 * 1024;
+    private static final int PER_CHUNK_SIZE = 1024;
     private static final String TAG = "ProtoLog";
     private static final long MAGIC_NUMBER_VALUE = ((long) MAGIC_NUMBER_H << 32) | MAGIC_NUMBER_L;
     static final String PROTOLOG_VERSION = "1.0.0";
     private static final int DEFAULT_PER_CHUNK_SIZE = 0;
 
     private final File mLogFile;
-    private final String mViewerConfigFilename;
+    private final String mLegacyViewerConfigFilename;
     private final TraceBuffer mBuffer;
-    protected final ProtoLogViewerConfigReader mViewerConfig;
+    private final LegacyProtoLogViewerConfigReader mViewerConfig;
     private final int mPerChunkSize;
 
     private boolean mProtoLogEnabled;
     private boolean mProtoLogEnabledLockFree;
     private final Object mProtoLogEnabledLock = new Object();
 
-    @VisibleForTesting
-    public enum LogLevel {
-        DEBUG, VERBOSE, INFO, WARN, ERROR, WTF
+    public LegacyProtoLogImpl(String outputFile, String viewerConfigFilename) {
+        this(new File(outputFile), viewerConfigFilename, BUFFER_CAPACITY,
+                new LegacyProtoLogViewerConfigReader(), PER_CHUNK_SIZE);
+    }
+
+    public LegacyProtoLogImpl(File file, String viewerConfigFilename, int bufferCapacity,
+            LegacyProtoLogViewerConfigReader viewerConfig, int perChunkSize) {
+        mLogFile = file;
+        mBuffer = new TraceBuffer(bufferCapacity);
+        mLegacyViewerConfigFilename = viewerConfigFilename;
+        mViewerConfig = viewerConfig;
+        mPerChunkSize = perChunkSize;
     }
 
     /**
      * Main log method, do not call directly.
      */
     @VisibleForTesting
-    public void log(LogLevel level, IProtoLogGroup group, int messageHash, int paramsMask,
+    @Override
+    public void log(LogLevel level, IProtoLogGroup group, long messageHash, int paramsMask,
             @Nullable String messageString, Object[] args) {
         if (group.isLogToProto()) {
             logToProto(messageHash, paramsMask, args);
@@ -103,7 +103,7 @@
         }
     }
 
-    private void logToLogcat(String tag, LogLevel level, int messageHash,
+    private void logToLogcat(String tag, LogLevel level, long messageHash,
             @Nullable String messageString, Object[] args) {
         String message = null;
         if (messageString == null) {
@@ -157,7 +157,7 @@
         }
     }
 
-    private void logToProto(int messageHash, int paramsMask, Object[] args) {
+    private void logToProto(long messageHash, int paramsMask, Object[] args) {
         if (!isProtoEnabled()) {
             return;
         }
@@ -219,20 +219,6 @@
         }
     }
 
-    public BaseProtoLogImpl(File file, String viewerConfigFilename, int bufferCapacity,
-            ProtoLogViewerConfigReader viewerConfig) {
-        this(file, viewerConfigFilename, bufferCapacity, viewerConfig, DEFAULT_PER_CHUNK_SIZE);
-    }
-
-    public BaseProtoLogImpl(File file, String viewerConfigFilename, int bufferCapacity,
-            ProtoLogViewerConfigReader viewerConfig, int perChunkSize) {
-        mLogFile = file;
-        mBuffer = new TraceBuffer(bufferCapacity);
-        mViewerConfigFilename = viewerConfigFilename;
-        mViewerConfig = viewerConfig;
-        mPerChunkSize = perChunkSize;
-    }
-
     /**
      * Starts the logging a circular proto buffer.
      *
@@ -248,7 +234,6 @@
             mProtoLogEnabled = true;
             mProtoLogEnabledLockFree = true;
         }
-        sCacheUpdater.run();
     }
 
     /**
@@ -274,7 +259,6 @@
                 throw new IllegalStateException("logging enabled while waiting for flush.");
             }
         }
-        sCacheUpdater.run();
     }
 
     /**
@@ -284,11 +268,11 @@
         return mProtoLogEnabledLockFree;
     }
 
-    protected int setLogging(boolean setTextLogging, boolean value, PrintWriter pw,
+    private int setLogging(boolean setTextLogging, boolean value, ILogger logger,
             String... groups) {
         for (int i = 0; i < groups.length; i++) {
             String group = groups[i];
-            IProtoLogGroup g = LOG_GROUPS.get(group);
+            IProtoLogGroup g = mLogGroups.get(group);
             if (g != null) {
                 if (setTextLogging) {
                     g.setLogToLogcat(value);
@@ -296,11 +280,10 @@
                     g.setLogToProto(value);
                 }
             } else {
-                logAndPrintln(pw, "No IProtoLogGroup named " + group);
+                logger.log("No IProtoLogGroup named " + group);
                 return -1;
             }
         }
-        sCacheUpdater.run();
         return 0;
     }
 
@@ -330,6 +313,7 @@
         while ((arg = shell.getNextArg()) != null) {
             args.add(arg);
         }
+        final ILogger logger = (msg) -> logAndPrintln(pw, msg);
         String[] groups = args.toArray(new String[args.size()]);
         switch (cmd) {
             case "start":
@@ -342,14 +326,14 @@
                 logAndPrintln(pw, getStatus());
                 return 0;
             case "enable":
-                return setLogging(false, true, pw, groups);
+                return setLogging(false, true, logger, groups);
             case "enable-text":
-                mViewerConfig.loadViewerConfig(pw, mViewerConfigFilename);
-                return setLogging(true, true, pw, groups);
+                mViewerConfig.loadViewerConfig(logger, mLegacyViewerConfigFilename);
+                return setLogging(true, true, logger, groups);
             case "disable":
-                return setLogging(false, false, pw, groups);
+                return setLogging(false, false, logger, groups);
             case "disable-text":
-                return setLogging(true, false, pw, groups);
+                return setLogging(true, false, logger, groups);
             default:
                 return unknownCommand(pw);
         }
@@ -362,12 +346,12 @@
         return "ProtoLog status: "
                 + ((isProtoEnabled()) ? "Enabled" : "Disabled")
                 + "\nEnabled log groups: \n  Proto: "
-                + LOG_GROUPS.values().stream().filter(
-                    it -> it.isEnabled() && it.isLogToProto())
+                + mLogGroups.values().stream().filter(
+                        it -> it.isEnabled() && it.isLogToProto())
                 .map(IProtoLogGroup::name).collect(Collectors.joining(" "))
                 + "\n  Logcat: "
-                + LOG_GROUPS.values().stream().filter(
-                    it -> it.isEnabled() && it.isLogToLogcat())
+                + mLogGroups.values().stream().filter(
+                        it -> it.isEnabled() && it.isLogToLogcat())
                 .map(IProtoLogGroup::name).collect(Collectors.joining(" "))
                 + "\nLogging definitions loaded: " + mViewerConfig.knownViewerStringsNumber();
     }
@@ -393,5 +377,26 @@
             pw.flush();
         }
     }
+
+    /**
+     * Start text logging
+     * @param groups Groups to start text logging for
+     * @param logger A logger to write status updates to
+     * @return status code
+     */
+    public int startLoggingToLogcat(String[] groups, ILogger logger) {
+        mViewerConfig.loadViewerConfig(logger, mLegacyViewerConfigFilename);
+        return setLogging(true /* setTextLogging */, true, logger, groups);
+    }
+
+    /**
+     * Stop text logging
+     * @param groups Groups to start text logging for
+     * @param logger A logger to write status updates to
+     * @return status code
+     */
+    public int stopLoggingToLogcat(String[] groups, ILogger logger) {
+        return setLogging(true /* setTextLogging */, false, logger, groups);
+    }
 }
 
diff --git a/core/java/com/android/internal/protolog/LegacyProtoLogViewerConfigReader.java b/core/java/com/android/internal/protolog/LegacyProtoLogViewerConfigReader.java
new file mode 100644
index 0000000..1833410
--- /dev/null
+++ b/core/java/com/android/internal/protolog/LegacyProtoLogViewerConfigReader.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.protolog;
+
+import com.android.internal.protolog.common.ILogger;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.TreeMap;
+import java.util.zip.GZIPInputStream;
+
+/**
+ * Handles loading and parsing of ProtoLog viewer configuration.
+ */
+public class LegacyProtoLogViewerConfigReader {
+
+    private static final String TAG = "ProtoLogViewerConfigReader";
+    private Map<Long, String> mLogMessageMap = null;
+
+    /** Returns message format string for its hash or null if unavailable. */
+    public synchronized String getViewerString(long messageHash) {
+        if (mLogMessageMap != null) {
+            return mLogMessageMap.get(messageHash);
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Reads the specified viewer configuration file. Does nothing if the config is already loaded.
+     */
+    public synchronized void loadViewerConfig(ILogger logger, String viewerConfigFilename) {
+        try {
+            loadViewerConfig(new GZIPInputStream(new FileInputStream(viewerConfigFilename)));
+            logger.log("Loaded " + mLogMessageMap.size()
+                    + " log definitions from " + viewerConfigFilename);
+        } catch (FileNotFoundException e) {
+            logger.log("Unable to load log definitions: File "
+                    + viewerConfigFilename + " not found." + e);
+        } catch (IOException e) {
+            logger.log("Unable to load log definitions: IOException while reading "
+                    + viewerConfigFilename + ". " + e);
+        } catch (JSONException e) {
+            logger.log("Unable to load log definitions: JSON parsing exception while reading "
+                    + viewerConfigFilename + ". " + e);
+        }
+    }
+
+    /**
+     * Reads the specified viewer configuration input stream.
+     * Does nothing if the config is already loaded.
+     */
+    public synchronized void loadViewerConfig(InputStream viewerConfigInputStream)
+            throws IOException, JSONException {
+        if (mLogMessageMap != null) {
+            return;
+        }
+        InputStreamReader config = new InputStreamReader(viewerConfigInputStream);
+        BufferedReader reader = new BufferedReader(config);
+        StringBuilder builder = new StringBuilder();
+        String line;
+        while ((line = reader.readLine()) != null) {
+            builder.append(line).append('\n');
+        }
+        reader.close();
+        JSONObject json = new JSONObject(builder.toString());
+        JSONObject messages = json.getJSONObject("messages");
+
+        mLogMessageMap = new TreeMap<>();
+        Iterator it = messages.keys();
+        while (it.hasNext()) {
+            String key = (String) it.next();
+            try {
+                long hash = Long.parseLong(key);
+                JSONObject val = messages.getJSONObject(key);
+                String msg = val.getString("message");
+                mLogMessageMap.put(hash, msg);
+            } catch (NumberFormatException expected) {
+                // Not a messageHash - skip it
+            }
+        }
+    }
+
+    /**
+     * Returns the number of loaded log definitions kept in memory.
+     */
+    public synchronized int knownViewerStringsNumber() {
+        if (mLogMessageMap != null) {
+            return mLogMessageMap.size();
+        }
+        return 0;
+    }
+
+}
diff --git a/core/java/com/android/internal/protolog/PerfettoProtoLogImpl.java b/core/java/com/android/internal/protolog/PerfettoProtoLogImpl.java
new file mode 100644
index 0000000..53062d8
--- /dev/null
+++ b/core/java/com/android/internal/protolog/PerfettoProtoLogImpl.java
@@ -0,0 +1,559 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.protolog;
+
+import static perfetto.protos.PerfettoTrace.InternedData.PROTOLOG_STACKTRACE;
+import static perfetto.protos.PerfettoTrace.InternedData.PROTOLOG_STRING_ARGS;
+import static perfetto.protos.PerfettoTrace.InternedString.IID;
+import static perfetto.protos.PerfettoTrace.InternedString.STR;
+import static perfetto.protos.PerfettoTrace.ProtoLogMessage.BOOLEAN_PARAMS;
+import static perfetto.protos.PerfettoTrace.ProtoLogMessage.DOUBLE_PARAMS;
+import static perfetto.protos.PerfettoTrace.ProtoLogMessage.STACKTRACE_IID;
+import static perfetto.protos.PerfettoTrace.ProtoLogMessage.MESSAGE_ID;
+import static perfetto.protos.PerfettoTrace.ProtoLogMessage.SINT64_PARAMS;
+import static perfetto.protos.PerfettoTrace.ProtoLogMessage.STR_PARAM_IIDS;
+import static perfetto.protos.PerfettoTrace.ProtoLogViewerConfig.GROUPS;
+import static perfetto.protos.PerfettoTrace.ProtoLogViewerConfig.Group.ID;
+import static perfetto.protos.PerfettoTrace.ProtoLogViewerConfig.Group.NAME;
+import static perfetto.protos.PerfettoTrace.ProtoLogViewerConfig.Group.TAG;
+import static perfetto.protos.PerfettoTrace.ProtoLogViewerConfig.MESSAGES;
+import static perfetto.protos.PerfettoTrace.ProtoLogViewerConfig.MessageData.GROUP_ID;
+import static perfetto.protos.PerfettoTrace.ProtoLogViewerConfig.MessageData.LEVEL;
+import static perfetto.protos.PerfettoTrace.ProtoLogViewerConfig.MessageData.MESSAGE;
+import static perfetto.protos.PerfettoTrace.TracePacket.INTERNED_DATA;
+import static perfetto.protos.PerfettoTrace.TracePacket.PROTOLOG_MESSAGE;
+import static perfetto.protos.PerfettoTrace.TracePacket.PROTOLOG_VIEWER_CONFIG;
+import static perfetto.protos.PerfettoTrace.TracePacket.SEQUENCE_FLAGS;
+import static perfetto.protos.PerfettoTrace.TracePacket.SEQ_INCREMENTAL_STATE_CLEARED;
+import static perfetto.protos.PerfettoTrace.TracePacket.SEQ_NEEDS_INCREMENTAL_STATE;
+import static perfetto.protos.PerfettoTrace.TracePacket.TIMESTAMP;
+
+import android.annotation.Nullable;
+import android.os.ShellCommand;
+import android.os.SystemClock;
+import android.os.Trace;
+import android.text.TextUtils;
+import android.tracing.perfetto.DataSourceParams;
+import android.tracing.perfetto.InitArguments;
+import android.tracing.perfetto.Producer;
+import android.tracing.perfetto.TracingContext;
+import android.util.LongArray;
+import android.util.Slog;
+import android.util.proto.ProtoInputStream;
+import android.util.proto.ProtoOutputStream;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.protolog.common.ILogger;
+import com.android.internal.protolog.common.IProtoLog;
+import com.android.internal.protolog.common.IProtoLogGroup;
+import com.android.internal.protolog.common.LogDataType;
+import com.android.internal.protolog.common.LogLevel;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.util.ArrayList;
+import java.util.Map;
+import java.util.TreeMap;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import perfetto.protos.PerfettoTrace.ProtoLogViewerConfig.MessageData;
+
+/**
+ * A service for the ProtoLog logging system.
+ */
+public class PerfettoProtoLogImpl implements IProtoLog {
+    private final TreeMap<String, IProtoLogGroup> mLogGroups = new TreeMap<>();
+    private static final String LOG_TAG = "ProtoLog";
+    private final AtomicInteger mTracingInstances = new AtomicInteger();
+
+    private final ProtoLogDataSource mDataSource = new ProtoLogDataSource(
+            this.mTracingInstances::incrementAndGet,
+            this::dumpTransitionTraceConfig,
+            this.mTracingInstances::decrementAndGet
+    );
+    private final ProtoLogViewerConfigReader mViewerConfigReader;
+    private final ViewerConfigInputStreamProvider mViewerConfigInputStreamProvider;
+
+    public PerfettoProtoLogImpl(String viewerConfigFilePath) {
+        this(() -> {
+            try {
+                return new ProtoInputStream(new FileInputStream(viewerConfigFilePath));
+            } catch (FileNotFoundException e) {
+                Slog.w(LOG_TAG, "Failed to load viewer config file " + viewerConfigFilePath, e);
+                return null;
+            }
+        });
+    }
+
+    public PerfettoProtoLogImpl(ViewerConfigInputStreamProvider viewerConfigInputStreamProvider) {
+        this(viewerConfigInputStreamProvider,
+                new ProtoLogViewerConfigReader(viewerConfigInputStreamProvider));
+    }
+
+    @VisibleForTesting
+    public PerfettoProtoLogImpl(
+            ViewerConfigInputStreamProvider viewerConfigInputStreamProvider,
+            ProtoLogViewerConfigReader viewerConfigReader
+    ) {
+        Producer.init(InitArguments.DEFAULTS);
+        mDataSource.register(DataSourceParams.DEFAULTS);
+        this.mViewerConfigInputStreamProvider = viewerConfigInputStreamProvider;
+        this.mViewerConfigReader = viewerConfigReader;
+    }
+
+    /**
+     * Main log method, do not call directly.
+     */
+    @VisibleForTesting
+    @Override
+    public void log(LogLevel level, IProtoLogGroup group, long messageHash, int paramsMask,
+            @Nullable String messageString, Object[] args) {
+        Trace.traceBegin(Trace.TRACE_TAG_WINDOW_MANAGER, "log");
+
+        long tsNanos = SystemClock.elapsedRealtimeNanos();
+        try {
+            logToProto(level, group.name(), messageHash, paramsMask, args, tsNanos);
+            if (group.isLogToLogcat()) {
+                logToLogcat(group.getTag(), level, messageHash, messageString, args);
+            }
+        } finally {
+            Trace.traceEnd(Trace.TRACE_TAG_WINDOW_MANAGER);
+        }
+    }
+
+    private void dumpTransitionTraceConfig() {
+        ProtoInputStream pis = mViewerConfigInputStreamProvider.getInputStream();
+
+        if (pis == null) {
+            Slog.w(LOG_TAG, "Failed to get viewer input stream.");
+            return;
+        }
+
+        mDataSource.trace(ctx -> {
+            final ProtoOutputStream os = ctx.newTracePacket();
+
+            os.write(TIMESTAMP, SystemClock.elapsedRealtimeNanos());
+
+            final long outProtologViewerConfigToken = os.start(PROTOLOG_VIEWER_CONFIG);
+            while (pis.nextField() != ProtoInputStream.NO_MORE_FIELDS) {
+                if (pis.getFieldNumber() == (int) MESSAGES) {
+                    final long inMessageToken = pis.start(MESSAGES);
+                    final long outMessagesToken = os.start(MESSAGES);
+
+                    while (pis.nextField() != ProtoInputStream.NO_MORE_FIELDS) {
+                        switch (pis.getFieldNumber()) {
+                            case (int) MessageData.MESSAGE_ID:
+                                os.write(MessageData.MESSAGE_ID,
+                                        pis.readLong(MessageData.MESSAGE_ID));
+                                break;
+                            case (int) MESSAGE:
+                                os.write(MESSAGE, pis.readString(MESSAGE));
+                                break;
+                            case (int) LEVEL:
+                                os.write(LEVEL, pis.readInt(LEVEL));
+                                break;
+                            case (int) GROUP_ID:
+                                os.write(GROUP_ID, pis.readInt(GROUP_ID));
+                                break;
+                            default:
+                                throw new RuntimeException(
+                                        "Unexpected field id " + pis.getFieldNumber());
+                        }
+                    }
+
+                    pis.end(inMessageToken);
+                    os.end(outMessagesToken);
+                }
+
+                if (pis.getFieldNumber() == (int) GROUPS) {
+                    final long inGroupToken = pis.start(GROUPS);
+                    final long outGroupToken = os.start(GROUPS);
+
+                    while (pis.nextField() != ProtoInputStream.NO_MORE_FIELDS) {
+                        switch (pis.getFieldNumber()) {
+                            case (int) ID:
+                                int id = pis.readInt(ID);
+                                os.write(ID, id);
+                                break;
+                            case (int) NAME:
+                                String name = pis.readString(NAME);
+                                os.write(NAME, name);
+                                break;
+                            case (int) TAG:
+                                String tag = pis.readString(TAG);
+                                os.write(TAG, tag);
+                                break;
+                            default:
+                                throw new RuntimeException(
+                                        "Unexpected field id " + pis.getFieldNumber());
+                        }
+                    }
+
+                    pis.end(inGroupToken);
+                    os.end(outGroupToken);
+                }
+            }
+
+            os.end(outProtologViewerConfigToken);
+
+            ctx.flush();
+        });
+
+        mDataSource.flush();
+    }
+
+    private void logToLogcat(String tag, LogLevel level, long messageHash,
+            @Nullable String messageString, Object[] args) {
+        Trace.traceBegin(Trace.TRACE_TAG_WINDOW_MANAGER, "logToLogcat");
+        try {
+            doLogToLogcat(tag, level, messageHash, messageString, args);
+        } finally {
+            Trace.traceEnd(Trace.TRACE_TAG_WINDOW_MANAGER);
+        }
+    }
+
+    private void doLogToLogcat(String tag, LogLevel level, long messageHash,
+            @androidx.annotation.Nullable String messageString, Object[] args) {
+        String message = null;
+        if (messageString == null) {
+            messageString = mViewerConfigReader.getViewerString(messageHash);
+        }
+        if (messageString != null) {
+            if (args != null) {
+                try {
+                    message = TextUtils.formatSimple(messageString, args);
+                } catch (Exception ex) {
+                    Slog.w(LOG_TAG, "Invalid ProtoLog format string.", ex);
+                }
+            } else {
+                message = messageString;
+            }
+        }
+        if (message == null) {
+            StringBuilder builder = new StringBuilder("UNKNOWN MESSAGE (" + messageHash + ")");
+            for (Object o : args) {
+                builder.append(" ").append(o);
+            }
+            message = builder.toString();
+        }
+        passToLogcat(tag, level, message);
+    }
+
+    /**
+     * SLog wrapper.
+     */
+    @VisibleForTesting
+    public void passToLogcat(String tag, LogLevel level, String message) {
+        switch (level) {
+            case DEBUG:
+                Slog.d(tag, message);
+                break;
+            case VERBOSE:
+                Slog.v(tag, message);
+                break;
+            case INFO:
+                Slog.i(tag, message);
+                break;
+            case WARN:
+                Slog.w(tag, message);
+                break;
+            case ERROR:
+                Slog.e(tag, message);
+                break;
+            case WTF:
+                Slog.wtf(tag, message);
+                break;
+        }
+    }
+
+    private void logToProto(LogLevel level, String groupName, long messageHash, int paramsMask,
+            Object[] args, long tsNanos) {
+        if (!isProtoEnabled()) {
+            return;
+        }
+
+        Trace.traceBegin(Trace.TRACE_TAG_WINDOW_MANAGER, "logToProto");
+        try {
+            doLogToProto(level, groupName, messageHash, paramsMask, args, tsNanos);
+        } finally {
+            Trace.traceEnd(Trace.TRACE_TAG_WINDOW_MANAGER);
+        }
+    }
+
+    private void doLogToProto(LogLevel level, String groupName, long messageHash, int paramsMask,
+            Object[] args, long tsNanos) {
+        mDataSource.trace(ctx -> {
+            final ProtoLogDataSource.TlsState tlsState = ctx.getCustomTlsState();
+            final LogLevel logFrom = tlsState.getLogFromLevel(groupName);
+
+            if (level.ordinal() < logFrom.ordinal()) {
+                return;
+            }
+
+            if (args != null) {
+                // Intern all string params before creating the trace packet for the proto
+                // message so that the interned strings appear before in the trace to make the
+                // trace processing easier.
+                int argIndex = 0;
+                for (Object o : args) {
+                    int type = LogDataType.bitmaskToLogDataType(paramsMask, argIndex);
+                    if (type == LogDataType.STRING) {
+                        internStringArg(ctx, o.toString());
+                    }
+                    argIndex++;
+                }
+            }
+
+            int internedStacktrace = 0;
+            if (tlsState.getShouldCollectStacktrace(groupName)) {
+                // Intern stackstraces before creating the trace packet for the proto message so
+                // that the interned stacktrace strings appear before in the trace to make the
+                // trace processing easier.
+                String stacktrace = collectStackTrace();
+                internedStacktrace = internStacktraceString(ctx, stacktrace);
+            }
+
+            final ProtoOutputStream os = ctx.newTracePacket();
+            os.write(TIMESTAMP, tsNanos);
+            long token = os.start(PROTOLOG_MESSAGE);
+            os.write(MESSAGE_ID, messageHash);
+
+            boolean needsIncrementalState = false;
+
+            if (args != null) {
+
+                int argIndex = 0;
+                LongArray longParams = new LongArray();
+                ArrayList<Double> doubleParams = new ArrayList<>();
+                ArrayList<Boolean> booleanParams = new ArrayList<>();
+                for (Object o : args) {
+                    int type = LogDataType.bitmaskToLogDataType(paramsMask, argIndex);
+                    try {
+                        switch (type) {
+                            case LogDataType.STRING:
+                                final int internedStringId = internStringArg(ctx, o.toString());
+                                os.write(STR_PARAM_IIDS, internedStringId);
+                                needsIncrementalState = true;
+                                break;
+                            case LogDataType.LONG:
+                                longParams.add(((Number) o).longValue());
+                                break;
+                            case LogDataType.DOUBLE:
+                                doubleParams.add(((Number) o).doubleValue());
+                                break;
+                            case LogDataType.BOOLEAN:
+                                booleanParams.add((boolean) o);
+                                break;
+                        }
+                    } catch (ClassCastException ex) {
+                        Slog.e(LOG_TAG, "Invalid ProtoLog paramsMask", ex);
+                    }
+                    argIndex++;
+                }
+
+                for (int i = 0; i < longParams.size(); ++i) {
+                    os.write(SINT64_PARAMS, longParams.get(i));
+                }
+                doubleParams.forEach(it -> os.write(DOUBLE_PARAMS, it));
+                // Converting booleans to int because Perfetto doesn't yet support repeated
+                // booleans, so we use a repeated integers instead (b/313651412).
+                booleanParams.forEach(it -> os.write(BOOLEAN_PARAMS, it ? 1 : 0));
+            }
+
+            if (tlsState.getShouldCollectStacktrace(groupName)) {
+                os.write(STACKTRACE_IID, internedStacktrace);
+            }
+
+            os.end(token);
+
+            if (needsIncrementalState) {
+                os.write(SEQUENCE_FLAGS, SEQ_NEEDS_INCREMENTAL_STATE);
+            }
+
+        });
+    }
+
+    private static final int STACK_SIZE_TO_PROTO_LOG_ENTRY_CALL = 12;
+
+    private String collectStackTrace() {
+        StackTraceElement[] stackTrace =  Thread.currentThread().getStackTrace();
+        StringWriter sw = new StringWriter();
+        try (PrintWriter pw = new PrintWriter(sw)) {
+            for (int i = STACK_SIZE_TO_PROTO_LOG_ENTRY_CALL; i < stackTrace.length; ++i) {
+                pw.println("\tat " + stackTrace[i]);
+            }
+        }
+
+        return sw.toString();
+    }
+
+    private int internStacktraceString(TracingContext<ProtoLogDataSource.Instance,
+            ProtoLogDataSource.TlsState,
+            ProtoLogDataSource.IncrementalState> ctx,
+            String stacktrace) {
+        final ProtoLogDataSource.IncrementalState incrementalState = ctx.getIncrementalState();
+        return internString(ctx, incrementalState.stacktraceInterningMap,
+                PROTOLOG_STACKTRACE, stacktrace);
+    }
+
+    private int internStringArg(
+            TracingContext<ProtoLogDataSource.Instance,
+            ProtoLogDataSource.TlsState,
+            ProtoLogDataSource.IncrementalState> ctx,
+            String string
+    ) {
+        final ProtoLogDataSource.IncrementalState incrementalState = ctx.getIncrementalState();
+        return internString(ctx, incrementalState.argumentInterningMap,
+                PROTOLOG_STRING_ARGS, string);
+    }
+
+    private int internString(
+            TracingContext<ProtoLogDataSource.Instance,
+                ProtoLogDataSource.TlsState,
+                ProtoLogDataSource.IncrementalState> ctx,
+            Map<String, Integer> internMap,
+            long fieldId,
+            String string
+    ) {
+        final ProtoLogDataSource.IncrementalState incrementalState = ctx.getIncrementalState();
+
+        if (!incrementalState.clearReported) {
+            final ProtoOutputStream os = ctx.newTracePacket();
+            os.write(SEQUENCE_FLAGS, SEQ_INCREMENTAL_STATE_CLEARED);
+            incrementalState.clearReported = true;
+        }
+
+        if (!internMap.containsKey(string)) {
+            final int internedIndex = internMap.size() + 1;
+            internMap.put(string, internedIndex);
+
+            final ProtoOutputStream os = ctx.newTracePacket();
+            final long token = os.start(INTERNED_DATA);
+            final long innerToken = os.start(fieldId);
+            os.write(IID, internedIndex);
+            os.write(STR, string.getBytes());
+            os.end(innerToken);
+            os.end(token);
+        }
+
+        return internMap.get(string);
+    }
+
+    /**
+     * Responds to a shell command.
+     */
+    public int onShellCommand(ShellCommand shell) {
+        PrintWriter pw = shell.getOutPrintWriter();
+        String cmd = shell.getNextArg();
+        if (cmd == null) {
+            return unknownCommand(pw);
+        }
+        ArrayList<String> args = new ArrayList<>();
+        String arg;
+        while ((arg = shell.getNextArg()) != null) {
+            args.add(arg);
+        }
+        final ILogger logger = (msg) -> logAndPrintln(pw, msg);
+        String[] groups = args.toArray(new String[args.size()]);
+        switch (cmd) {
+            case "enable-text":
+                return this.startLoggingToLogcat(groups, logger);
+            case "disable-text":
+                return this.stopLoggingToLogcat(groups, logger);
+            default:
+                return unknownCommand(pw);
+        }
+    }
+
+    private int unknownCommand(PrintWriter pw) {
+        pw.println("Unknown command");
+        pw.println("Window manager logging options:");
+        pw.println("  enable-text [group...]: Enable logcat logging for given groups");
+        pw.println("  disable-text [group...]: Disable logcat logging for given groups");
+        return -1;
+    }
+
+    /**
+     * Returns {@code true} iff logging to proto is enabled.
+     */
+    public boolean isProtoEnabled() {
+        return mTracingInstances.get() > 0;
+    }
+
+    /**
+     * Start text logging
+     * @param groups Groups to start text logging for
+     * @param logger A logger to write status updates to
+     * @return status code
+     */
+    public int startLoggingToLogcat(String[] groups, ILogger logger) {
+        mViewerConfigReader.loadViewerConfig(logger);
+        return setTextLogging(true, logger, groups);
+    }
+
+    /**
+     * Stop text logging
+     * @param groups Groups to start text logging for
+     * @param logger A logger to write status updates to
+     * @return status code
+     */
+    public int stopLoggingToLogcat(String[] groups, ILogger logger) {
+        mViewerConfigReader.unloadViewerConfig();
+        return setTextLogging(false, logger, groups);
+    }
+
+    /**
+     * Start logging the stack trace of the when the log message happened for target groups
+     * @return status code
+     */
+    public int startLoggingStackTrace(String[] groups, ILogger logger) {
+        return -1;
+    }
+
+    /**
+     * Stop logging the stack trace of the when the log message happened for target groups
+     * @return status code
+     */
+    public int stopLoggingStackTrace() {
+        return -1;
+    }
+
+    private int setTextLogging(boolean value, ILogger logger, String... groups) {
+        for (int i = 0; i < groups.length; i++) {
+            String group = groups[i];
+            IProtoLogGroup g = mLogGroups.get(group);
+            if (g != null) {
+                g.setLogToLogcat(value);
+            } else {
+                logger.log("No IProtoLogGroup named " + group);
+                return -1;
+            }
+        }
+        return 0;
+    }
+
+    static void logAndPrintln(@Nullable PrintWriter pw, String msg) {
+        Slog.i(LOG_TAG, msg);
+        if (pw != null) {
+            pw.println(msg);
+            pw.flush();
+        }
+    }
+}
+
diff --git a/core/java/com/android/internal/protolog/ProtoLogDataSource.java b/core/java/com/android/internal/protolog/ProtoLogDataSource.java
new file mode 100644
index 0000000..a8ff75d
--- /dev/null
+++ b/core/java/com/android/internal/protolog/ProtoLogDataSource.java
@@ -0,0 +1,294 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.protolog;
+
+import static perfetto.protos.PerfettoTrace.DataSourceConfig.PROTOLOG_CONFIG;
+import static perfetto.protos.PerfettoTrace.ProtoLogConfig.GROUP_OVERRIDES;
+import static perfetto.protos.PerfettoTrace.ProtoLogConfig.TRACING_MODE;
+import static perfetto.protos.PerfettoTrace.ProtoLogGroup.COLLECT_STACKTRACE;
+import static perfetto.protos.PerfettoTrace.ProtoLogGroup.LOG_FROM;
+import static perfetto.protos.PerfettoTrace.ProtoLogGroup.GROUP_NAME;
+
+import android.tracing.perfetto.CreateIncrementalStateArgs;
+import android.tracing.perfetto.CreateTlsStateArgs;
+import android.tracing.perfetto.DataSource;
+import android.tracing.perfetto.DataSourceInstance;
+import android.tracing.perfetto.FlushCallbackArguments;
+import android.tracing.perfetto.StartCallbackArguments;
+import android.tracing.perfetto.StopCallbackArguments;
+import android.util.proto.ProtoInputStream;
+import android.util.proto.WireTypeMismatchException;
+
+import com.android.internal.protolog.common.LogLevel;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+import perfetto.protos.PerfettoTrace;
+
+public class ProtoLogDataSource extends DataSource<ProtoLogDataSource.Instance,
+        ProtoLogDataSource.TlsState,
+        ProtoLogDataSource.IncrementalState> {
+
+    private final Runnable mOnStart;
+    private final Runnable mOnFlush;
+    private final Runnable mOnStop;
+
+    public ProtoLogDataSource(Runnable onStart, Runnable onFlush, Runnable onStop) {
+        super("android.protolog");
+        this.mOnStart = onStart;
+        this.mOnFlush = onFlush;
+        this.mOnStop = onStop;
+    }
+
+    @Override
+    public Instance createInstance(ProtoInputStream configStream, int instanceIndex) {
+        ProtoLogConfig config = null;
+
+        try {
+            while (configStream.nextField() != ProtoInputStream.NO_MORE_FIELDS) {
+                try {
+                    if (configStream.getFieldNumber() == (int) PROTOLOG_CONFIG) {
+                        if (config != null) {
+                            throw new RuntimeException("ProtoLog config already set in loop");
+                        }
+                        config = readProtoLogConfig(configStream);
+                    }
+                } catch (WireTypeMismatchException e) {
+                    throw new RuntimeException("Failed to parse ProtoLog DataSource config", e);
+                }
+            }
+        } catch (IOException e) {
+            throw new RuntimeException("Failed to read ProtoLog DataSource config", e);
+        }
+
+        if (config == null) {
+            // No config found
+            config = ProtoLogConfig.DEFAULT;
+        }
+
+        return new Instance(
+                this, instanceIndex, config, mOnStart, mOnFlush, mOnStop);
+    }
+
+    @Override
+    public TlsState createTlsState(CreateTlsStateArgs<Instance> args) {
+        try (Instance dsInstance = args.getDataSourceInstanceLocked()) {
+            if (dsInstance == null) {
+                // Datasource instance has been removed
+                return new TlsState(ProtoLogConfig.DEFAULT);
+            }
+            return new TlsState(dsInstance.mConfig);
+        }
+    }
+
+    @Override
+    public IncrementalState createIncrementalState(CreateIncrementalStateArgs<Instance> args) {
+        return new IncrementalState();
+    }
+
+    public static class TlsState {
+        private final ProtoLogConfig mConfig;
+
+        private TlsState(ProtoLogConfig config) {
+            this.mConfig = config;
+        }
+
+        /**
+         * Get the log from level for a group.
+         * @param groupTag The tag of the group to get the log from level.
+         * @return The lowest LogLevel (inclusive) to log message from.
+         */
+        public LogLevel getLogFromLevel(String groupTag) {
+            return getConfigFor(groupTag).logFrom;
+        }
+
+        /**
+         * Get if the stacktrace for the log message should be collected for this group.
+         * @param groupTag The tag of the group to get whether or not a stacktrace was requested.
+         * @return True iff a stacktrace was requested to be collected from this group in the
+         *         tracing config.
+         */
+        public boolean getShouldCollectStacktrace(String groupTag) {
+            return getConfigFor(groupTag).collectStackTrace;
+        }
+
+        private GroupConfig getConfigFor(String groupTag) {
+            return mConfig.getConfigFor(groupTag);
+        }
+    }
+
+    public static class IncrementalState {
+        public final Map<String, Integer> argumentInterningMap = new HashMap<>();
+        public final Map<String, Integer> stacktraceInterningMap = new HashMap<>();
+        public boolean clearReported = false;
+    }
+
+    private static class ProtoLogConfig {
+        private final LogLevel mDefaultLogFromLevel;
+        private final Map<String, GroupConfig> mGroupConfigs;
+
+        private static final ProtoLogConfig DEFAULT =
+                new ProtoLogConfig(LogLevel.WTF, new HashMap<>());
+
+        private ProtoLogConfig(
+                LogLevel defaultLogFromLevel, Map<String, GroupConfig> groupConfigs) {
+            this.mDefaultLogFromLevel = defaultLogFromLevel;
+            this.mGroupConfigs = groupConfigs;
+        }
+
+        private GroupConfig getConfigFor(String groupTag) {
+            return mGroupConfigs.getOrDefault(groupTag, getDefaultGroupConfig());
+        }
+
+        private GroupConfig getDefaultGroupConfig() {
+            return new GroupConfig(mDefaultLogFromLevel, false);
+        }
+    }
+
+    public static class GroupConfig {
+        public final LogLevel logFrom;
+        public final boolean collectStackTrace;
+
+        public GroupConfig(LogLevel logFromLevel, boolean collectStackTrace) {
+            this.logFrom = logFromLevel;
+            this.collectStackTrace = collectStackTrace;
+        }
+    }
+
+    private ProtoLogConfig readProtoLogConfig(ProtoInputStream configStream)
+            throws IOException {
+        final long config_token = configStream.start(PROTOLOG_CONFIG);
+
+        LogLevel defaultLogFromLevel = LogLevel.WTF;
+        final Map<String, GroupConfig> groupConfigs = new HashMap<>();
+
+        while (configStream.nextField() != ProtoInputStream.NO_MORE_FIELDS) {
+            if (configStream.getFieldNumber() == (int) TRACING_MODE) {
+                int tracingMode = configStream.readInt(TRACING_MODE);
+                switch (tracingMode) {
+                    case PerfettoTrace.ProtoLogConfig.DEFAULT:
+                        break;
+                    case PerfettoTrace.ProtoLogConfig.ENABLE_ALL:
+                        defaultLogFromLevel = LogLevel.DEBUG;
+                        break;
+                    default:
+                        throw new RuntimeException("Unhandled ProtoLog tracing mode type");
+                }
+            }
+            if (configStream.getFieldNumber() == (int) GROUP_OVERRIDES) {
+                final long group_overrides_token  = configStream.start(GROUP_OVERRIDES);
+
+                String tag = null;
+                LogLevel logFromLevel = defaultLogFromLevel;
+                boolean collectStackTrace = false;
+                while (configStream.nextField() != ProtoInputStream.NO_MORE_FIELDS) {
+                    if (configStream.getFieldNumber() == (int) GROUP_NAME) {
+                        tag = configStream.readString(GROUP_NAME);
+                    }
+                    if (configStream.getFieldNumber() == (int) LOG_FROM) {
+                        final int logFromInt = configStream.readInt(LOG_FROM);
+                        switch (logFromInt) {
+                            case (PerfettoTrace.PROTOLOG_LEVEL_DEBUG): {
+                                logFromLevel = LogLevel.DEBUG;
+                                break;
+                            }
+                            case (PerfettoTrace.PROTOLOG_LEVEL_VERBOSE): {
+                                logFromLevel = LogLevel.VERBOSE;
+                                break;
+                            }
+                            case (PerfettoTrace.PROTOLOG_LEVEL_INFO): {
+                                logFromLevel = LogLevel.INFO;
+                                break;
+                            }
+                            case (PerfettoTrace.PROTOLOG_LEVEL_WARN): {
+                                logFromLevel = LogLevel.WARN;
+                                break;
+                            }
+                            case (PerfettoTrace.PROTOLOG_LEVEL_ERROR): {
+                                logFromLevel = LogLevel.ERROR;
+                                break;
+                            }
+                            case (PerfettoTrace.PROTOLOG_LEVEL_WTF): {
+                                logFromLevel = LogLevel.WTF;
+                                break;
+                            }
+                            default: {
+                                throw new RuntimeException("Unhandled log level");
+                            }
+                        }
+                    }
+                    if (configStream.getFieldNumber() == (int) COLLECT_STACKTRACE) {
+                        collectStackTrace = configStream.readBoolean(COLLECT_STACKTRACE);
+                    }
+                }
+
+                if (tag == null) {
+                    throw new RuntimeException("Failed to decode proto config. "
+                            + "Got a group override without a group tag.");
+                }
+
+                groupConfigs.put(tag, new GroupConfig(logFromLevel, collectStackTrace));
+
+                configStream.end(group_overrides_token);
+            }
+        }
+
+        configStream.end(config_token);
+
+        return new ProtoLogConfig(defaultLogFromLevel, groupConfigs);
+    }
+
+    public static class Instance extends DataSourceInstance {
+
+        private final Runnable mOnStart;
+        private final Runnable mOnFlush;
+        private final Runnable mOnStop;
+        private final ProtoLogConfig mConfig;
+
+        public Instance(
+                DataSource<Instance, TlsState, IncrementalState> dataSource,
+                int instanceIdx,
+                ProtoLogConfig config,
+                Runnable onStart,
+                Runnable onFlush,
+                Runnable onStop
+        ) {
+            super(dataSource, instanceIdx);
+            this.mOnStart = onStart;
+            this.mOnFlush = onFlush;
+            this.mOnStop = onStop;
+            this.mConfig = config;
+        }
+
+        @Override
+        public void onStart(StartCallbackArguments args) {
+            this.mOnStart.run();
+        }
+
+        @Override
+        public void onFlush(FlushCallbackArguments args) {
+            this.mOnFlush.run();
+        }
+
+        @Override
+        public void onStop(StopCallbackArguments args) {
+            this.mOnStop.run();
+        }
+    }
+}
diff --git a/core/java/com/android/internal/protolog/ProtoLogImpl.java b/core/java/com/android/internal/protolog/ProtoLogImpl.java
index 527cfdd..78bed94 100644
--- a/core/java/com/android/internal/protolog/ProtoLogImpl.java
+++ b/core/java/com/android/internal/protolog/ProtoLogImpl.java
@@ -16,30 +16,35 @@
 
 package com.android.internal.protolog;
 
+import static com.android.internal.protolog.common.ProtoLogToolInjected.Value.LEGACY_OUTPUT_FILE_PATH;
+import static com.android.internal.protolog.common.ProtoLogToolInjected.Value.LEGACY_VIEWER_CONFIG_PATH;
+import static com.android.internal.protolog.common.ProtoLogToolInjected.Value.VIEWER_CONFIG_PATH;
+
 import android.annotation.Nullable;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.protolog.common.IProtoLog;
 import com.android.internal.protolog.common.IProtoLogGroup;
-
-import java.io.File;
+import com.android.internal.protolog.common.LogLevel;
+import com.android.internal.protolog.common.ProtoLogToolInjected;
 
 /**
  * A service for the ProtoLog logging system.
  */
-public class ProtoLogImpl extends BaseProtoLogImpl {
-    private static final int BUFFER_CAPACITY = 1024 * 1024;
-    private static final String LOG_FILENAME = "/data/misc/wmtrace/wm_log.winscope";
-    private static final String VIEWER_CONFIG_FILENAME = "/system/etc/protolog.conf.json.gz";
-    private static final int PER_CHUNK_SIZE = 1024;
+public class ProtoLogImpl {
+    private static IProtoLog sServiceInstance = null;
 
-    private static ProtoLogImpl sServiceInstance = null;
+    @ProtoLogToolInjected(VIEWER_CONFIG_PATH)
+    private static String sViewerConfigPath;
 
-    static {
-        addLogGroupEnum(ProtoLogGroup.values());
-    }
+    @ProtoLogToolInjected(LEGACY_VIEWER_CONFIG_PATH)
+    private static String sLegacyViewerConfigPath;
+
+    @ProtoLogToolInjected(LEGACY_OUTPUT_FILE_PATH)
+    private static String sLegacyOutputFilePath;
 
     /** Used by the ProtoLogTool, do not call directly - use {@code ProtoLog} class instead. */
-    public static void d(IProtoLogGroup group, int messageHash, int paramsMask,
+    public static void d(IProtoLogGroup group, long messageHash, int paramsMask,
             @Nullable String messageString,
             Object... args) {
         getSingleInstance()
@@ -47,7 +52,7 @@
     }
 
     /** Used by the ProtoLogTool, do not call directly - use {@code ProtoLog} class instead. */
-    public static void v(IProtoLogGroup group, int messageHash, int paramsMask,
+    public static void v(IProtoLogGroup group, long messageHash, int paramsMask,
             @Nullable String messageString,
             Object... args) {
         getSingleInstance().log(LogLevel.VERBOSE, group, messageHash, paramsMask, messageString,
@@ -55,21 +60,21 @@
     }
 
     /** Used by the ProtoLogTool, do not call directly - use {@code ProtoLog} class instead. */
-    public static void i(IProtoLogGroup group, int messageHash, int paramsMask,
+    public static void i(IProtoLogGroup group, long messageHash, int paramsMask,
             @Nullable String messageString,
             Object... args) {
         getSingleInstance().log(LogLevel.INFO, group, messageHash, paramsMask, messageString, args);
     }
 
     /** Used by the ProtoLogTool, do not call directly - use {@code ProtoLog} class instead. */
-    public static void w(IProtoLogGroup group, int messageHash, int paramsMask,
+    public static void w(IProtoLogGroup group, long messageHash, int paramsMask,
             @Nullable String messageString,
             Object... args) {
         getSingleInstance().log(LogLevel.WARN, group, messageHash, paramsMask, messageString, args);
     }
 
     /** Used by the ProtoLogTool, do not call directly - use {@code ProtoLog} class instead. */
-    public static void e(IProtoLogGroup group, int messageHash, int paramsMask,
+    public static void e(IProtoLogGroup group, long messageHash, int paramsMask,
             @Nullable String messageString,
             Object... args) {
         getSingleInstance()
@@ -77,40 +82,36 @@
     }
 
     /** Used by the ProtoLogTool, do not call directly - use {@code ProtoLog} class instead. */
-    public static void wtf(IProtoLogGroup group, int messageHash, int paramsMask,
+    public static void wtf(IProtoLogGroup group, long messageHash, int paramsMask,
             @Nullable String messageString,
             Object... args) {
         getSingleInstance().log(LogLevel.WTF, group, messageHash, paramsMask, messageString, args);
     }
 
-    /** Returns true iff logging is enabled for the given {@code IProtoLogGroup}. */
     public static boolean isEnabled(IProtoLogGroup group) {
-        return group.isLogToLogcat()
-                || (group.isLogToProto() && getSingleInstance().isProtoEnabled());
+        // TODO: Implement for performance reasons, with optional level parameter?
+        return true;
     }
 
     /**
      * Returns the single instance of the ProtoLogImpl singleton class.
      */
-    public static synchronized ProtoLogImpl getSingleInstance() {
+    public static synchronized IProtoLog getSingleInstance() {
         if (sServiceInstance == null) {
-            sServiceInstance = new ProtoLogImpl(
-                    new File(LOG_FILENAME)
-                    , BUFFER_CAPACITY
-                    , new ProtoLogViewerConfigReader()
-                    , PER_CHUNK_SIZE);
+            if (android.tracing.Flags.perfettoProtolog()) {
+                sServiceInstance =
+                        new PerfettoProtoLogImpl(sViewerConfigPath);
+            } else {
+                sServiceInstance =
+                        new LegacyProtoLogImpl(sLegacyOutputFilePath, sLegacyViewerConfigPath);
+            }
         }
         return sServiceInstance;
     }
 
     @VisibleForTesting
-    public static synchronized void setSingleInstance(@Nullable ProtoLogImpl instance) {
+    public static synchronized void setSingleInstance(@Nullable IProtoLog instance) {
         sServiceInstance = instance;
     }
-
-    public ProtoLogImpl(File logFile, int bufferCapacity,
-            ProtoLogViewerConfigReader viewConfigReader, int perChunkSize) {
-        super(logFile, VIEWER_CONFIG_FILENAME, bufferCapacity, viewConfigReader, perChunkSize);
-  }
 }
 
diff --git a/core/java/com/android/internal/protolog/ProtoLogViewerConfigReader.java b/core/java/com/android/internal/protolog/ProtoLogViewerConfigReader.java
index aa30a77..3c206ac 100644
--- a/core/java/com/android/internal/protolog/ProtoLogViewerConfigReader.java
+++ b/core/java/com/android/internal/protolog/ProtoLogViewerConfigReader.java
@@ -1,48 +1,30 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
 package com.android.internal.protolog;
 
-import android.annotation.Nullable;
-import android.util.Slog;
+import static perfetto.protos.PerfettoTrace.ProtoLogViewerConfig.MESSAGES;
+import static perfetto.protos.PerfettoTrace.ProtoLogViewerConfig.MessageData.MESSAGE;
+import static perfetto.protos.PerfettoTrace.ProtoLogViewerConfig.MessageData.MESSAGE_ID;
 
-import org.json.JSONException;
-import org.json.JSONObject;
+import android.util.proto.ProtoInputStream;
 
-import java.io.BufferedReader;
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
+import com.android.internal.protolog.common.ILogger;
+
 import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.io.PrintWriter;
-import java.util.Iterator;
 import java.util.Map;
-import java.util.TreeMap;
-import java.util.zip.GZIPInputStream;
 
-/**
- * Handles loading and parsing of ProtoLog viewer configuration.
- */
 public class ProtoLogViewerConfigReader {
-    private static final String TAG = "ProtoLogViewerConfigReader";
-    private Map<Integer, String> mLogMessageMap = null;
+    private final ViewerConfigInputStreamProvider mViewerConfigInputStreamProvider;
+    private Map<Long, String> mLogMessageMap = null;
 
-    /** Returns message format string for its hash or null if unavailable. */
-    public synchronized String getViewerString(int messageHash) {
+    public ProtoLogViewerConfigReader(
+            ViewerConfigInputStreamProvider viewerConfigInputStreamProvider) {
+        this.mViewerConfigInputStreamProvider = viewerConfigInputStreamProvider;
+    }
+
+    /**
+     * Returns message format string for its hash or null if unavailable
+     * or the viewer config is not loaded into memory.
+     */
+    public synchronized String getViewerString(long messageHash) {
         if (mLogMessageMap != null) {
             return mLogMessageMap.get(messageHash);
         } else {
@@ -51,75 +33,61 @@
     }
 
     /**
-     * Reads the specified viewer configuration file. Does nothing if the config is already loaded.
+     * Loads the viewer config into memory. No-op if already loaded in memory.
      */
-    public synchronized void loadViewerConfig(PrintWriter pw, String viewerConfigFilename) {
-        try {
-            loadViewerConfig(new GZIPInputStream(new FileInputStream(viewerConfigFilename)));
-            logAndPrintln(pw, "Loaded " + mLogMessageMap.size()
-                    + " log definitions from " + viewerConfigFilename);
-        } catch (FileNotFoundException e) {
-            logAndPrintln(pw, "Unable to load log definitions: File "
-                    + viewerConfigFilename + " not found." + e);
-        } catch (IOException e) {
-            logAndPrintln(pw, "Unable to load log definitions: IOException while reading "
-                    + viewerConfigFilename + ". " + e);
-        } catch (JSONException e) {
-            logAndPrintln(pw, "Unable to load log definitions: JSON parsing exception while reading "
-                    + viewerConfigFilename + ". " + e);
-        }
-    }
-
-    /**
-     * Reads the specified viewer configuration input stream.
-     * Does nothing if the config is already loaded.
-     */
-    public synchronized void loadViewerConfig(InputStream viewerConfigInputStream)
-            throws IOException, JSONException {
+    public synchronized void loadViewerConfig(ILogger logger) {
         if (mLogMessageMap != null) {
             return;
         }
-        InputStreamReader config = new InputStreamReader(viewerConfigInputStream);
-        BufferedReader reader = new BufferedReader(config);
-        StringBuilder builder = new StringBuilder();
-        String line;
-        while ((line = reader.readLine()) != null) {
-            builder.append(line).append('\n');
-        }
-        reader.close();
-        JSONObject json = new JSONObject(builder.toString());
-        JSONObject messages = json.getJSONObject("messages");
 
-        mLogMessageMap = new TreeMap<>();
-        Iterator it = messages.keys();
-        while (it.hasNext()) {
-            String key = (String) it.next();
-            try {
-                int hash = Integer.parseInt(key);
-                JSONObject val = messages.getJSONObject(key);
-                String msg = val.getString("message");
-                mLogMessageMap.put(hash, msg);
-            } catch (NumberFormatException expected) {
-                // Not a messageHash - skip it
-            }
+        try {
+            doLoadViewerConfig();
+            logger.log("Loaded " + mLogMessageMap.size() + " log definitions");
+        } catch (IOException e) {
+            logger.log("Unable to load log definitions: "
+                    + "IOException while processing viewer config" + e);
         }
     }
 
     /**
-     * Returns the number of loaded log definitions kept in memory.
+     * Unload the viewer config from memory.
      */
-    public synchronized int knownViewerStringsNumber() {
-        if (mLogMessageMap != null) {
-            return mLogMessageMap.size();
-        }
-        return 0;
+    public synchronized void unloadViewerConfig() {
+        mLogMessageMap = null;
     }
 
-    static void logAndPrintln(@Nullable PrintWriter pw, String msg) {
-        Slog.i(TAG, msg);
-        if (pw != null) {
-            pw.println(msg);
-            pw.flush();
+    private void doLoadViewerConfig() throws IOException {
+        final ProtoInputStream pis = mViewerConfigInputStreamProvider.getInputStream();
+
+        while (pis.nextField() != ProtoInputStream.NO_MORE_FIELDS) {
+            if (pis.getFieldNumber() == (int) MESSAGES) {
+                final long inMessageToken = pis.start(MESSAGES);
+
+                long messageId = 0;
+                String message = null;
+                while (pis.nextField() != ProtoInputStream.NO_MORE_FIELDS) {
+                    switch (pis.getFieldNumber()) {
+                        case (int) MESSAGE_ID:
+                            messageId = pis.readLong(MESSAGE_ID);
+                            break;
+                        case (int) MESSAGE:
+                            message = pis.readString(MESSAGE);
+                            break;
+                    }
+                }
+
+                if (messageId == 0) {
+                    throw new IOException("Failed to get message id");
+                }
+
+                if (message == null) {
+                    throw new IOException("Failed to get message string");
+                }
+
+                mLogMessageMap.put(messageId, message);
+
+                pis.end(inMessageToken);
+            }
         }
     }
 }
diff --git a/core/java/com/android/internal/protolog/ViewerConfigInputStreamProvider.java b/core/java/com/android/internal/protolog/ViewerConfigInputStreamProvider.java
new file mode 100644
index 0000000..334f548
--- /dev/null
+++ b/core/java/com/android/internal/protolog/ViewerConfigInputStreamProvider.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.protolog;
+
+import android.util.proto.ProtoInputStream;
+
+public interface ViewerConfigInputStreamProvider {
+    /**
+     * @return a ProtoInputStream.
+     */
+    ProtoInputStream getInputStream();
+}
diff --git a/core/java/com/android/internal/protolog/common/ILogger.java b/core/java/com/android/internal/protolog/common/ILogger.java
new file mode 100644
index 0000000..cc6fa5e
--- /dev/null
+++ b/core/java/com/android/internal/protolog/common/ILogger.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.protolog.common;
+
+public interface ILogger {
+    /**
+     * Log a message.
+     * @param message The log message.
+     */
+    void log(String message);
+}
diff --git a/core/java/com/android/internal/protolog/common/IProtoLog.java b/core/java/com/android/internal/protolog/common/IProtoLog.java
new file mode 100644
index 0000000..c06d14b
--- /dev/null
+++ b/core/java/com/android/internal/protolog/common/IProtoLog.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.protolog.common;
+
+/**
+ * Interface for ProtoLog implementations.
+ */
+public interface IProtoLog {
+
+    /**
+     * Log a ProtoLog message
+     * @param logLevel Log level of the proto message.
+     * @param group The group this message belongs to.
+     * @param messageHash The hash of the message.
+     * @param paramsMask The parameters mask of the message.
+     * @param messageString The message string.
+     * @param args The arguments of the message.
+     */
+    void log(LogLevel logLevel, IProtoLogGroup group, long messageHash, int paramsMask,
+             String messageString, Object[] args);
+
+    /**
+     * Check if ProtoLog is tracing.
+     * @return true iff a ProtoLog tracing session is active.
+     */
+    boolean isProtoEnabled();
+
+    /**
+     * Start logging log groups to logcat
+     * @param groups Groups to start text logging for
+     * @return status code
+     */
+    int startLoggingToLogcat(String[] groups, ILogger logger);
+
+    /**
+     * Stop logging log groups to logcat
+     * @param groups Groups to start text logging for
+     * @return status code
+     */
+    int stopLoggingToLogcat(String[] groups, ILogger logger);
+}
diff --git a/core/java/com/android/internal/protolog/common/IProtoLogGroup.java b/core/java/com/android/internal/protolog/common/IProtoLogGroup.java
index e3db468..4e9686f99 100644
--- a/core/java/com/android/internal/protolog/common/IProtoLogGroup.java
+++ b/core/java/com/android/internal/protolog/common/IProtoLogGroup.java
@@ -26,6 +26,7 @@
     boolean isEnabled();
 
     /**
+     * @deprecated TODO(b/324128613) remove once we migrate fully to Perfetto
      * is binary logging enabled for the group.
      */
     boolean isLogToProto();
diff --git a/core/java/com/android/internal/protolog/common/ProtoLog.java b/core/java/com/android/internal/protolog/common/ProtoLog.java
index 8870096..18e3f66 100644
--- a/core/java/com/android/internal/protolog/common/ProtoLog.java
+++ b/core/java/com/android/internal/protolog/common/ProtoLog.java
@@ -16,8 +16,6 @@
 
 package com.android.internal.protolog.common;
 
-import android.util.Log;
-
 /**
  * ProtoLog API - exposes static logging methods. Usage of this API is similar
  * to {@code android.utils.Log} class. Instead of plain text log messages each call consists of
@@ -55,9 +53,6 @@
             throw new UnsupportedOperationException(
                     "ProtoLog calls MUST be processed with ProtoLogTool");
         }
-        if (group.isLogToLogcat()) {
-            Log.d(group.getTag(), String.format(messageString, args));
-        }
     }
 
     /**
@@ -73,9 +68,6 @@
             throw new UnsupportedOperationException(
                     "ProtoLog calls MUST be processed with ProtoLogTool");
         }
-        if (group.isLogToLogcat()) {
-            Log.v(group.getTag(), String.format(messageString, args));
-        }
     }
 
     /**
@@ -91,9 +83,6 @@
             throw new UnsupportedOperationException(
                     "ProtoLog calls MUST be processed with ProtoLogTool");
         }
-        if (group.isLogToLogcat()) {
-            Log.i(group.getTag(), String.format(messageString, args));
-        }
     }
 
     /**
@@ -109,9 +98,6 @@
             throw new UnsupportedOperationException(
                     "ProtoLog calls MUST be processed with ProtoLogTool");
         }
-        if (group.isLogToLogcat()) {
-            Log.w(group.getTag(), String.format(messageString, args));
-        }
     }
 
     /**
@@ -127,9 +113,6 @@
             throw new UnsupportedOperationException(
                     "ProtoLog calls MUST be processed with ProtoLogTool");
         }
-        if (group.isLogToLogcat()) {
-            Log.e(group.getTag(), String.format(messageString, args));
-        }
     }
 
     /**
@@ -145,8 +128,30 @@
             throw new UnsupportedOperationException(
                     "ProtoLog calls MUST be processed with ProtoLogTool");
         }
-        if (group.isLogToLogcat()) {
-            Log.wtf(group.getTag(), String.format(messageString, args));
+    }
+
+    /**
+     * Check if ProtoLog isEnabled for a target group.
+     * @param group Group to check enable status of.
+     * @return true iff this is being logged.
+     */
+    public static boolean isEnabled(IProtoLogGroup group) {
+        if (REQUIRE_PROTOLOGTOOL) {
+            throw new UnsupportedOperationException(
+                    "ProtoLog calls MUST be processed with ProtoLogTool");
         }
+        return false;
+    }
+
+    /**
+     * Get the single ProtoLog instance.
+     * @return A singleton instance of ProtoLog.
+     */
+    public static IProtoLog getSingleInstance() {
+        if (REQUIRE_PROTOLOGTOOL) {
+            throw new UnsupportedOperationException(
+                    "ProtoLog calls MUST be processed with ProtoLogTool");
+        }
+        return null;
     }
 }
diff --git a/core/java/com/android/internal/protolog/common/ProtoLogToolInjected.java b/core/java/com/android/internal/protolog/common/ProtoLogToolInjected.java
new file mode 100644
index 0000000..ffd0d76
--- /dev/null
+++ b/core/java/com/android/internal/protolog/common/ProtoLogToolInjected.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package com.android.internal.protolog.common;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Target;
+
+@Target({ElementType.FIELD, ElementType.PARAMETER})
+public @interface ProtoLogToolInjected {
+    enum Value { VIEWER_CONFIG_PATH, LEGACY_OUTPUT_FILE_PATH, LEGACY_VIEWER_CONFIG_PATH }
+
+    Value value();
+}
diff --git a/core/proto/android/internal/protolog.proto b/core/proto/android/internal/protolog.proto
index fee7a87..9e205e2 100644
--- a/core/proto/android/internal/protolog.proto
+++ b/core/proto/android/internal/protolog.proto
@@ -27,7 +27,7 @@
     option (.android.msg_privacy).dest = DEST_LOCAL;
 
     /* log statement identifier, created from message string and log level. */
-    optional sfixed32 message_hash = 1;
+    optional sfixed32 message_hash_legacy = 1 [deprecated = true];
     /* log time, relative to the elapsed system time clock. */
     optional fixed64 elapsed_realtime_nanos = 2;
     /* string parameters passed to the log call. */
@@ -38,6 +38,9 @@
     repeated double double_params = 5 [packed=true];
     /* boolean parameters passed to the log call. */
     repeated bool boolean_params = 6 [packed=true];
+
+    /* log statement identifier, created from message string and log level. */
+    optional sfixed64 message_hash = 7;
 }
 
 /* represents a log file containing ProtoLog log entries.
diff --git a/data/etc/Android.bp b/data/etc/Android.bp
index 1fd1003..238a3e1 100644
--- a/data/etc/Android.bp
+++ b/data/etc/Android.bp
@@ -199,3 +199,8 @@
     name: "services.core.protolog.json",
     srcs: ["services.core.protolog.json"],
 }
+
+filegroup {
+    name: "file-core.protolog.pb",
+    srcs: ["core.protolog.pb"],
+}
diff --git a/data/etc/core.protolog.pb b/data/etc/core.protolog.pb
new file mode 100644
index 0000000..0415e44
--- /dev/null
+++ b/data/etc/core.protolog.pb
Binary files differ
diff --git a/libs/WindowManager/Shell/Android.bp b/libs/WindowManager/Shell/Android.bp
index d66c925..0ecf1f8 100644
--- a/libs/WindowManager/Shell/Android.bp
+++ b/libs/WindowManager/Shell/Android.bp
@@ -82,16 +82,18 @@
 genrule {
     name: "wm_shell_protolog_src",
     srcs: [
+        ":protolog-impl",
         ":wm_shell_protolog-groups",
         ":wm_shell-sources",
     ],
     tools: ["protologtool"],
     cmd: "$(location protologtool) transform-protolog-calls " +
         "--protolog-class com.android.internal.protolog.common.ProtoLog " +
-        "--protolog-impl-class com.android.wm.shell.protolog.ShellProtoLogImpl " +
-        "--protolog-cache-class com.android.wm.shell.protolog.ShellProtoLogCache " +
         "--loggroups-class com.android.wm.shell.protolog.ShellProtoLogGroup " +
         "--loggroups-jar $(location :wm_shell_protolog-groups) " +
+        "--viewer-config-file-path /system_ext/etc/wmshell.protolog.pb " +
+        "--legacy-viewer-config-file-path /system_ext/etc/wmshell.protolog.json.gz " +
+        "--legacy-output-file-path /data/misc/wmtrace/shell_log.winscope " +
         "--output-srcjar $(out) " +
         "$(locations :wm_shell-sources)",
     out: ["wm_shell_protolog.srcjar"],
@@ -108,12 +110,30 @@
         "--protolog-class com.android.internal.protolog.common.ProtoLog " +
         "--loggroups-class com.android.wm.shell.protolog.ShellProtoLogGroup " +
         "--loggroups-jar $(location :wm_shell_protolog-groups) " +
-        "--viewer-conf $(out) " +
+        "--viewer-config-type json " +
+        "--viewer-config $(out) " +
         "$(locations :wm_shell-sources)",
     out: ["wm_shell_protolog.json"],
 }
 
 genrule {
+    name: "gen-wmshell.protolog.pb",
+    srcs: [
+        ":wm_shell_protolog-groups",
+        ":wm_shell-sources",
+    ],
+    tools: ["protologtool"],
+    cmd: "$(location protologtool) generate-viewer-config " +
+        "--protolog-class com.android.internal.protolog.common.ProtoLog " +
+        "--loggroups-class com.android.wm.shell.protolog.ShellProtoLogGroup " +
+        "--loggroups-jar $(location :wm_shell_protolog-groups) " +
+        "--viewer-config-type proto " +
+        "--viewer-config $(out) " +
+        "$(locations :wm_shell-sources)",
+    out: ["wmshell.protolog.pb"],
+}
+
+genrule {
     name: "protolog.json.gz",
     srcs: [":generate-wm_shell_protolog.json"],
     out: ["wmshell.protolog.json.gz"],
@@ -127,6 +147,13 @@
     filename_from_src: true,
 }
 
+prebuilt_etc {
+    name: "wmshell.protolog.pb",
+    system_ext_specific: true,
+    src: ":gen-wmshell.protolog.pb",
+    filename_from_src: true,
+}
+
 // End ProtoLog
 
 java_library {
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/ProtoLogController.java b/libs/WindowManager/Shell/src/com/android/wm/shell/ProtoLogController.java
index 88525aa..93893e3 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/ProtoLogController.java
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/ProtoLogController.java
@@ -16,7 +16,10 @@
 
 package com.android.wm.shell;
 
-import com.android.wm.shell.protolog.ShellProtoLogImpl;
+import com.android.internal.protolog.LegacyProtoLogImpl;
+import com.android.internal.protolog.common.ILogger;
+import com.android.internal.protolog.common.IProtoLog;
+import com.android.internal.protolog.common.ProtoLog;
 import com.android.wm.shell.sysui.ShellCommandHandler;
 import com.android.wm.shell.sysui.ShellInit;
 
@@ -24,19 +27,19 @@
 import java.util.Arrays;
 
 /**
- * Controls the {@link ShellProtoLogImpl} in WMShell via adb shell commands.
+ * Controls the {@link ProtoLog} in WMShell via adb shell commands.
  *
  * Use with {@code adb shell dumpsys activity service SystemUIService WMShell protolog ...}.
  */
 public class ProtoLogController implements ShellCommandHandler.ShellCommandActionHandler {
     private final ShellCommandHandler mShellCommandHandler;
-    private final ShellProtoLogImpl mShellProtoLog;
+    private final IProtoLog mShellProtoLog;
 
     public ProtoLogController(ShellInit shellInit,
             ShellCommandHandler shellCommandHandler) {
         shellInit.addInitCallback(this::onInit, this);
         mShellCommandHandler = shellCommandHandler;
-        mShellProtoLog = ShellProtoLogImpl.getSingleInstance();
+        mShellProtoLog = ProtoLog.getSingleInstance();
     }
 
     void onInit() {
@@ -45,22 +48,35 @@
 
     @Override
     public boolean onShellCommand(String[] args, PrintWriter pw) {
+        final ILogger logger = pw::println;
         switch (args[0]) {
             case "status": {
-                pw.println(mShellProtoLog.getStatus());
+                if (android.tracing.Flags.perfettoProtolog()) {
+                    pw.println("(Deprecated) legacy command. Use Perfetto commands instead.");
+                    return false;
+                }
+                ((LegacyProtoLogImpl) mShellProtoLog).getStatus();
                 return true;
             }
             case "start": {
-                mShellProtoLog.startProtoLog(pw);
+                if (android.tracing.Flags.perfettoProtolog()) {
+                    pw.println("(Deprecated) legacy command. Use Perfetto commands instead.");
+                    return false;
+                }
+                ((LegacyProtoLogImpl) mShellProtoLog).startProtoLog(pw);
                 return true;
             }
             case "stop": {
-                mShellProtoLog.stopProtoLog(pw, true /* writeToFile */);
+                if (android.tracing.Flags.perfettoProtolog()) {
+                    pw.println("(Deprecated) legacy command. Use Perfetto commands instead.");
+                    return false;
+                }
+                ((LegacyProtoLogImpl) mShellProtoLog).stopProtoLog(pw, true);
                 return true;
             }
             case "enable-text": {
                 String[] groups = Arrays.copyOfRange(args, 1, args.length);
-                int result = mShellProtoLog.startTextLogging(groups, pw);
+                int result = mShellProtoLog.startLoggingToLogcat(groups, logger);
                 if (result == 0) {
                     pw.println("Starting logging on groups: " + Arrays.toString(groups));
                     return true;
@@ -69,7 +85,7 @@
             }
             case "disable-text": {
                 String[] groups = Arrays.copyOfRange(args, 1, args.length);
-                int result = mShellProtoLog.stopTextLogging(groups, pw);
+                int result = mShellProtoLog.stopLoggingToLogcat(groups, logger);
                 if (result == 0) {
                     pw.println("Stopping logging on groups: " + Arrays.toString(groups));
                     return true;
@@ -78,19 +94,23 @@
             }
             case "enable": {
                 String[] groups = Arrays.copyOfRange(args, 1, args.length);
-                return mShellProtoLog.startTextLogging(groups, pw) == 0;
+                return mShellProtoLog.startLoggingToLogcat(groups, logger) == 0;
             }
             case "disable": {
                 String[] groups = Arrays.copyOfRange(args, 1, args.length);
-                return mShellProtoLog.stopTextLogging(groups, pw) == 0;
+                return mShellProtoLog.stopLoggingToLogcat(groups, logger) == 0;
             }
             case "save-for-bugreport": {
+                if (android.tracing.Flags.perfettoProtolog()) {
+                    pw.println("(Deprecated) legacy command");
+                    return false;
+                }
                 if (!mShellProtoLog.isProtoEnabled()) {
                     pw.println("Logging to proto is not enabled for WMShell.");
                     return false;
                 }
-                mShellProtoLog.stopProtoLog(pw, true /* writeToFile */);
-                mShellProtoLog.startProtoLog(pw);
+                ((LegacyProtoLogImpl) mShellProtoLog).stopProtoLog(pw, true /* writeToFile */);
+                ((LegacyProtoLogImpl) mShellProtoLog).startProtoLog(pw);
                 return true;
             }
             default: {
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/protolog/ShellProtoLogImpl.java b/libs/WindowManager/Shell/src/com/android/wm/shell/protolog/ShellProtoLogImpl.java
deleted file mode 100644
index 93ffb3d..0000000
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/protolog/ShellProtoLogImpl.java
+++ /dev/null
@@ -1,120 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.wm.shell.protolog;
-
-import android.annotation.Nullable;
-
-import com.android.internal.protolog.BaseProtoLogImpl;
-import com.android.internal.protolog.ProtoLogViewerConfigReader;
-import com.android.internal.protolog.common.IProtoLogGroup;
-
-import java.io.File;
-import java.io.PrintWriter;
-
-
-/**
- * A service for the ProtoLog logging system.
- */
-public class ShellProtoLogImpl extends BaseProtoLogImpl {
-    private static final String TAG = "ProtoLogImpl";
-    private static final int BUFFER_CAPACITY = 1024 * 1024;
-    // TODO: find a proper location to save the protolog message file
-    private static final String LOG_FILENAME = "/data/misc/wmtrace/shell_log.winscope";
-    private static final String VIEWER_CONFIG_FILENAME = "/system_ext/etc/wmshell.protolog.json.gz";
-
-    private static ShellProtoLogImpl sServiceInstance = null;
-
-    static {
-        addLogGroupEnum(ShellProtoLogGroup.values());
-    }
-
-    /** Used by the ProtoLogTool, do not call directly - use {@code ProtoLog} class instead. */
-    public static void d(IProtoLogGroup group, int messageHash, int paramsMask,
-            @Nullable String messageString,
-            Object... args) {
-        getSingleInstance()
-                .log(LogLevel.DEBUG, group, messageHash, paramsMask, messageString, args);
-    }
-
-    /** Used by the ProtoLogTool, do not call directly - use {@code ProtoLog} class instead. */
-    public static void v(IProtoLogGroup group, int messageHash, int paramsMask,
-            @Nullable String messageString,
-            Object... args) {
-        getSingleInstance().log(LogLevel.VERBOSE, group, messageHash, paramsMask, messageString,
-                args);
-    }
-
-    /** Used by the ProtoLogTool, do not call directly - use {@code ProtoLog} class instead. */
-    public static void i(IProtoLogGroup group, int messageHash, int paramsMask,
-            @Nullable String messageString,
-            Object... args) {
-        getSingleInstance().log(LogLevel.INFO, group, messageHash, paramsMask, messageString, args);
-    }
-
-    /** Used by the ProtoLogTool, do not call directly - use {@code ProtoLog} class instead. */
-    public static void w(IProtoLogGroup group, int messageHash, int paramsMask,
-            @Nullable String messageString,
-            Object... args) {
-        getSingleInstance().log(LogLevel.WARN, group, messageHash, paramsMask, messageString, args);
-    }
-
-    /** Used by the ProtoLogTool, do not call directly - use {@code ProtoLog} class instead. */
-    public static void e(IProtoLogGroup group, int messageHash, int paramsMask,
-            @Nullable String messageString,
-            Object... args) {
-        getSingleInstance()
-                .log(LogLevel.ERROR, group, messageHash, paramsMask, messageString, args);
-    }
-
-    /** Used by the ProtoLogTool, do not call directly - use {@code ProtoLog} class instead. */
-    public static void wtf(IProtoLogGroup group, int messageHash, int paramsMask,
-            @Nullable String messageString,
-            Object... args) {
-        getSingleInstance().log(LogLevel.WTF, group, messageHash, paramsMask, messageString, args);
-    }
-
-    /** Returns true iff logging is enabled for the given {@code IProtoLogGroup}. */
-    public static boolean isEnabled(IProtoLogGroup group) {
-        return group.isLogToLogcat()
-                || (group.isLogToProto() && getSingleInstance().isProtoEnabled());
-    }
-
-    /**
-     * Returns the single instance of the ProtoLogImpl singleton class.
-     */
-    public static synchronized ShellProtoLogImpl getSingleInstance() {
-        if (sServiceInstance == null) {
-            sServiceInstance = new ShellProtoLogImpl();
-        }
-        return sServiceInstance;
-    }
-
-    public int startTextLogging(String[] groups, PrintWriter pw) {
-        mViewerConfig.loadViewerConfig(pw, VIEWER_CONFIG_FILENAME);
-        return setLogging(true /* setTextLogging */, true, pw, groups);
-    }
-
-    public int stopTextLogging(String[] groups, PrintWriter pw) {
-        return setLogging(true /* setTextLogging */, false, pw, groups);
-    }
-
-    private ShellProtoLogImpl() {
-        super(new File(LOG_FILENAME), VIEWER_CONFIG_FILENAME, BUFFER_CAPACITY,
-                new ProtoLogViewerConfigReader());
-    }
-}
-
diff --git a/libs/WindowManager/Shell/src/com/android/wm/shell/util/KtProtoLog.kt b/libs/WindowManager/Shell/src/com/android/wm/shell/util/KtProtoLog.kt
index 9b48a54..7a50814 100644
--- a/libs/WindowManager/Shell/src/com/android/wm/shell/util/KtProtoLog.kt
+++ b/libs/WindowManager/Shell/src/com/android/wm/shell/util/KtProtoLog.kt
@@ -18,7 +18,7 @@
 
 import android.util.Log
 import com.android.internal.protolog.common.IProtoLogGroup
-import com.android.wm.shell.protolog.ShellProtoLogImpl
+import com.android.internal.protolog.common.ProtoLog
 
 /**
  * Log messages using an API similar to [com.android.internal.protolog.common.ProtoLog]. Useful for
@@ -31,42 +31,42 @@
     companion object {
         /** @see [com.android.internal.protolog.common.ProtoLog.d] */
         fun d(group: IProtoLogGroup, messageString: String, vararg args: Any) {
-            if (ShellProtoLogImpl.isEnabled(group)) {
+            if (ProtoLog.isEnabled(group)) {
                 Log.d(group.tag, String.format(messageString, *args))
             }
         }
 
         /** @see [com.android.internal.protolog.common.ProtoLog.v] */
         fun v(group: IProtoLogGroup, messageString: String, vararg args: Any) {
-            if (ShellProtoLogImpl.isEnabled(group)) {
+            if (ProtoLog.isEnabled(group)) {
                 Log.v(group.tag, String.format(messageString, *args))
             }
         }
 
         /** @see [com.android.internal.protolog.common.ProtoLog.i] */
         fun i(group: IProtoLogGroup, messageString: String, vararg args: Any) {
-            if (ShellProtoLogImpl.isEnabled(group)) {
+            if (ProtoLog.isEnabled(group)) {
                 Log.i(group.tag, String.format(messageString, *args))
             }
         }
 
         /** @see [com.android.internal.protolog.common.ProtoLog.w] */
         fun w(group: IProtoLogGroup, messageString: String, vararg args: Any) {
-            if (ShellProtoLogImpl.isEnabled(group)) {
+            if (ProtoLog.isEnabled(group)) {
                 Log.w(group.tag, String.format(messageString, *args))
             }
         }
 
         /** @see [com.android.internal.protolog.common.ProtoLog.e] */
         fun e(group: IProtoLogGroup, messageString: String, vararg args: Any) {
-            if (ShellProtoLogImpl.isEnabled(group)) {
+            if (ProtoLog.isEnabled(group)) {
                 Log.e(group.tag, String.format(messageString, *args))
             }
         }
 
         /** @see [com.android.internal.protolog.common.ProtoLog.wtf] */
         fun wtf(group: IProtoLogGroup, messageString: String, vararg args: Any) {
-            if (ShellProtoLogImpl.isEnabled(group)) {
+            if (ProtoLog.isEnabled(group)) {
                 Log.wtf(group.tag, String.format(messageString, *args))
             }
         }
diff --git a/packages/SystemUI/Android.bp b/packages/SystemUI/Android.bp
index d1a3571..bed95a5 100644
--- a/packages/SystemUI/Android.bp
+++ b/packages/SystemUI/Android.bp
@@ -550,5 +550,6 @@
     required: [
         "privapp_whitelist_com.android.systemui",
         "wmshell.protolog.json.gz",
+        "wmshell.protolog.pb",
     ],
 }
diff --git a/services/core/Android.bp b/services/core/Android.bp
index 7940ca6..94aab75 100644
--- a/services/core/Android.bp
+++ b/services/core/Android.bp
@@ -41,16 +41,18 @@
 genrule {
     name: "services.core.protologsrc",
     srcs: [
+        ":protolog-impl",
         ":protolog-groups",
         ":services.core-sources-am-wm",
     ],
     tools: ["protologtool"],
     cmd: "$(location protologtool) transform-protolog-calls " +
         "--protolog-class com.android.internal.protolog.common.ProtoLog " +
-        "--protolog-impl-class com.android.internal.protolog.ProtoLogImpl " +
-        "--protolog-cache-class 'com.android.server.wm.ProtoLogCache' " +
         "--loggroups-class com.android.internal.protolog.ProtoLogGroup " +
         "--loggroups-jar $(location :protolog-groups) " +
+        "--viewer-config-file-path /etc/core.protolog.pb " +
+        "--legacy-viewer-config-file-path /system/etc/protolog.conf.json.gz " +
+        "--legacy-output-file-path /data/misc/wmtrace/wm_log.winscope " +
         "--output-srcjar $(out) " +
         "$(locations :services.core-sources-am-wm)",
     out: ["services.core.protolog.srcjar"],
@@ -67,25 +69,43 @@
         "--protolog-class com.android.internal.protolog.common.ProtoLog " +
         "--loggroups-class com.android.internal.protolog.ProtoLogGroup " +
         "--loggroups-jar $(location :protolog-groups) " +
-        "--viewer-conf $(out) " +
+        "--viewer-config-type json " +
+        "--viewer-config $(out) " +
         "$(locations :services.core-sources-am-wm)",
     out: ["services.core.protolog.json"],
 }
 
 genrule {
-    name: "checked-protolog.json",
+    name: "gen-core.protolog.pb",
     srcs: [
-        ":generate-protolog.json",
-        ":services.core.protolog.json",
+        ":protolog-groups",
+        ":services.core-sources-am-wm",
     ],
-    cmd: "cp $(location :generate-protolog.json) $(out) && " +
-        "{ ! (diff $(out) $(location :services.core.protolog.json) | grep -q '^<') || " +
+    tools: ["protologtool"],
+    cmd: "$(location protologtool) generate-viewer-config " +
+        "--protolog-class com.android.internal.protolog.common.ProtoLog " +
+        "--loggroups-class com.android.internal.protolog.ProtoLogGroup " +
+        "--loggroups-jar $(location :protolog-groups) " +
+        "--viewer-config-type proto " +
+        "--viewer-config $(out) " +
+        "$(locations :services.core-sources-am-wm)",
+    out: ["core.protolog.pb"],
+}
+
+genrule {
+    name: "checked-core.protolog.pb",
+    srcs: [
+        ":gen-core.protolog.pb",
+        ":file-core.protolog.pb",
+    ],
+    cmd: "cp $(location :gen-core.protolog.pb) $(out) && " +
+        "{ ! (diff $(out) $(location :file-core.protolog.pb) | grep -q '^<') || " +
         "{ echo -e '\\n\\n################################################################\\n#\\n" +
         "#  ERROR: ProtoLog viewer config is stale.  To update it, run:\\n#\\n" +
-        "#  cp $${ANDROID_BUILD_TOP}/$(location :generate-protolog.json) " +
-        "$${ANDROID_BUILD_TOP}/$(location :services.core.protolog.json)\\n#\\n" +
+        "#  cp $${ANDROID_BUILD_TOP}/$(location :gen-core.protolog.pb) " +
+        "$${ANDROID_BUILD_TOP}/$(location :file-core.protolog.pb)\\n#\\n" +
         "################################################################\\n\\n' >&2 && false; } }",
-    out: ["services.core.protolog.json"],
+    out: ["core.protolog.pb"],
 }
 
 genrule {
@@ -157,7 +177,7 @@
     required: [
         "default_television.xml",
         "gps_debug.conf",
-        "protolog.conf.json.gz",
+        "core.protolog.pb",
     ],
 
     static_libs: [
@@ -258,14 +278,7 @@
     src: "java/com/android/server/location/gnss/gps_debug.conf",
 }
 
-genrule {
-    name: "services.core.json.gz",
-    srcs: [":checked-protolog.json"],
-    out: ["services.core.protolog.json.gz"],
-    cmd: "gzip -c < $(in) > $(out)",
-}
-
 prebuilt_etc {
-    name: "protolog.conf.json.gz",
-    src: ":services.core.json.gz",
+    name: "core.protolog.pb",
+    src: ":checked-core.protolog.pb",
 }
diff --git a/services/core/java/com/android/server/wm/AppTransition.java b/services/core/java/com/android/server/wm/AppTransition.java
index 939cf1a..1a63f14 100644
--- a/services/core/java/com/android/server/wm/AppTransition.java
+++ b/services/core/java/com/android/server/wm/AppTransition.java
@@ -137,7 +137,6 @@
 
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.policy.TransitionAnimation;
-import com.android.internal.protolog.ProtoLogImpl;
 import com.android.internal.protolog.common.ProtoLog;
 import com.android.internal.util.DumpUtils.Dump;
 import com.android.internal.util.function.pooled.PooledLambda;
@@ -248,7 +247,7 @@
         mHandler = new Handler(service.mH.getLooper());
         mDisplayContent = displayContent;
         mTransitionAnimation = new TransitionAnimation(
-                context, ProtoLogImpl.isEnabled(WM_DEBUG_ANIM), TAG);
+                context, ProtoLog.isEnabled(WM_DEBUG_ANIM), TAG);
 
         mGridLayoutRecentsEnabled = SystemProperties.getBoolean("ro.recents.grid", false);
 
diff --git a/services/core/java/com/android/server/wm/RemoteAnimationController.java b/services/core/java/com/android/server/wm/RemoteAnimationController.java
index a98b9f7..3ef6eeb 100644
--- a/services/core/java/com/android/server/wm/RemoteAnimationController.java
+++ b/services/core/java/com/android/server/wm/RemoteAnimationController.java
@@ -44,7 +44,6 @@
 import android.view.WindowManager;
 
 import com.android.internal.annotations.VisibleForTesting;
-import com.android.internal.protolog.ProtoLogImpl;
 import com.android.internal.protolog.common.ProtoLog;
 import com.android.internal.util.FastPrintWriter;
 import com.android.server.wm.SurfaceAnimator.AnimationType;
@@ -210,7 +209,7 @@
                 Slog.e(TAG, "Failed to start remote animation", e);
                 onAnimationFinished();
             }
-            if (ProtoLogImpl.isEnabled(WM_DEBUG_REMOTE_ANIMATIONS)) {
+            if (ProtoLog.isEnabled(WM_DEBUG_REMOTE_ANIMATIONS)) {
                 ProtoLog.d(WM_DEBUG_REMOTE_ANIMATIONS, "startAnimation(): Notify animation start:");
                 writeStartDebugStatement();
             }
diff --git a/services/core/java/com/android/server/wm/SurfaceAnimator.java b/services/core/java/com/android/server/wm/SurfaceAnimator.java
index c3de4d5..d67684c 100644
--- a/services/core/java/com/android/server/wm/SurfaceAnimator.java
+++ b/services/core/java/com/android/server/wm/SurfaceAnimator.java
@@ -32,7 +32,6 @@
 import android.view.SurfaceControl.Transaction;
 
 import com.android.internal.annotations.VisibleForTesting;
-import com.android.internal.protolog.ProtoLogImpl;
 import com.android.internal.protolog.common.ProtoLog;
 
 import java.io.PrintWriter;
@@ -193,7 +192,7 @@
             return;
         }
         mAnimation.startAnimation(mLeash, t, type, mInnerAnimationFinishedCallback);
-        if (ProtoLogImpl.isEnabled(WM_DEBUG_ANIM)) {
+        if (ProtoLog.isEnabled(WM_DEBUG_ANIM)) {
             StringWriter sw = new StringWriter();
             PrintWriter pw = new PrintWriter(sw);
             mAnimation.dump(pw, "");
diff --git a/services/core/java/com/android/server/wm/WallpaperController.java b/services/core/java/com/android/server/wm/WallpaperController.java
index 001f46d..594043d 100644
--- a/services/core/java/com/android/server/wm/WallpaperController.java
+++ b/services/core/java/com/android/server/wm/WallpaperController.java
@@ -58,7 +58,6 @@
 
 import com.android.internal.R;
 import com.android.internal.annotations.VisibleForTesting;
-import com.android.internal.protolog.ProtoLogImpl;
 import com.android.internal.protolog.common.ProtoLog;
 import com.android.internal.util.ToBooleanFunction;
 import com.android.server.wallpaper.WallpaperCropper.WallpaperCropUtils;
@@ -336,7 +335,7 @@
         for (int i = mWallpaperTokens.size() - 1; i >= 0; i--) {
             final WallpaperWindowToken token = mWallpaperTokens.get(i);
             token.setVisibility(false);
-            if (ProtoLogImpl.isEnabled(WM_DEBUG_WALLPAPER) && token.isVisible()) {
+            if (ProtoLog.isEnabled(WM_DEBUG_WALLPAPER) && token.isVisible()) {
                 ProtoLog.d(WM_DEBUG_WALLPAPER,
                         "Hiding wallpaper %s from %s target=%s prev=%s callers=%s",
                         token, winGoingAway, mWallpaperTarget, mPrevWallpaperTarget,
diff --git a/services/core/java/com/android/server/wm/WindowContainer.java b/services/core/java/com/android/server/wm/WindowContainer.java
index 61fde5e..fd0289e 100644
--- a/services/core/java/com/android/server/wm/WindowContainer.java
+++ b/services/core/java/com/android/server/wm/WindowContainer.java
@@ -113,7 +113,6 @@
 import com.android.internal.R;
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.graphics.ColorUtils;
-import com.android.internal.protolog.ProtoLogImpl;
 import com.android.internal.protolog.common.ProtoLog;
 import com.android.internal.util.ToBooleanFunction;
 import com.android.server.wm.SurfaceAnimator.Animatable;
@@ -3410,7 +3409,7 @@
                 // ActivityOption#makeCustomAnimation or WindowManager#overridePendingTransition.
                 a.restrictDuration(MAX_APP_TRANSITION_DURATION);
             }
-            if (ProtoLogImpl.isEnabled(WM_DEBUG_ANIM)) {
+            if (ProtoLog.isEnabled(WM_DEBUG_ANIM)) {
                 ProtoLog.i(WM_DEBUG_ANIM, "Loaded animation %s for %s, duration: %d, stack=%s",
                         a, this, ((a != null) ? a.getDuration() : 0), Debug.getCallers(20));
             }
diff --git a/services/core/java/com/android/server/wm/WindowManagerService.java b/services/core/java/com/android/server/wm/WindowManagerService.java
index 9b7bc43..08d43ae 100644
--- a/services/core/java/com/android/server/wm/WindowManagerService.java
+++ b/services/core/java/com/android/server/wm/WindowManagerService.java
@@ -327,8 +327,8 @@
 import com.android.internal.policy.IKeyguardLockedStateListener;
 import com.android.internal.policy.IShortcutService;
 import com.android.internal.policy.KeyInterceptionInfo;
+import com.android.internal.protolog.LegacyProtoLogImpl;
 import com.android.internal.protolog.ProtoLogGroup;
-import com.android.internal.protolog.ProtoLogImpl;
 import com.android.internal.protolog.common.ProtoLog;
 import com.android.internal.util.DumpUtils;
 import com.android.internal.util.FastPrintWriter;
@@ -6701,7 +6701,11 @@
 
     private void dumpLogStatus(PrintWriter pw) {
         pw.println("WINDOW MANAGER LOGGING (dumpsys window logging)");
-        pw.println(ProtoLogImpl.getSingleInstance().getStatus());
+        if (android.tracing.Flags.perfettoProtolog()) {
+            pw.println("Deprecated legacy command. Use Perfetto commands instead.");
+            return;
+        }
+        ((LegacyProtoLogImpl) ProtoLog.getSingleInstance()).getStatus();
     }
 
     private void dumpSessionsLocked(PrintWriter pw) {
diff --git a/services/core/java/com/android/server/wm/WindowManagerShellCommand.java b/services/core/java/com/android/server/wm/WindowManagerShellCommand.java
index 8fad950..0b29f96 100644
--- a/services/core/java/com/android/server/wm/WindowManagerShellCommand.java
+++ b/services/core/java/com/android/server/wm/WindowManagerShellCommand.java
@@ -48,7 +48,9 @@
 import android.view.ViewDebug;
 
 import com.android.internal.os.ByteTransferPipe;
-import com.android.internal.protolog.ProtoLogImpl;
+import com.android.internal.protolog.LegacyProtoLogImpl;
+import com.android.internal.protolog.common.IProtoLog;
+import com.android.internal.protolog.common.ProtoLog;
 import com.android.server.IoThread;
 import com.android.server.wm.LetterboxConfiguration.LetterboxBackgroundType;
 import com.android.server.wm.LetterboxConfiguration.LetterboxHorizontalReachabilityPosition;
@@ -107,11 +109,19 @@
                     // trace files can be written.
                     return mInternal.mWindowTracing.onShellCommand(this);
                 case "logging":
-                    int result = ProtoLogImpl.getSingleInstance().onShellCommand(this);
-                    if (result != 0) {
-                        pw.println("Not handled, please use "
-                                + "`adb shell dumpsys activity service SystemUIService WMShell` "
-                                + "if you are looking for ProtoLog in WMShell");
+                    IProtoLog instance = ProtoLog.getSingleInstance();
+                    int result = 0;
+                    if (instance instanceof LegacyProtoLogImpl) {
+                        result = ((LegacyProtoLogImpl) instance).onShellCommand(this);
+                        if (result != 0) {
+                            pw.println("Not handled, please use "
+                                    + "`adb shell dumpsys activity service SystemUIService "
+                                    + "WMShell` if you are looking for ProtoLog in WMShell");
+                        }
+                    } else {
+                        result = -1;
+                        pw.println("Command not supported. "
+                                + "Only supported when using legacy ProtoLog.");
                     }
                     return result;
                 case "user-rotation":
diff --git a/services/core/java/com/android/server/wm/WindowState.java b/services/core/java/com/android/server/wm/WindowState.java
index 90f5b62..a7a28c2 100644
--- a/services/core/java/com/android/server/wm/WindowState.java
+++ b/services/core/java/com/android/server/wm/WindowState.java
@@ -245,7 +245,6 @@
 
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.policy.KeyInterceptionInfo;
-import com.android.internal.protolog.ProtoLogImpl;
 import com.android.internal.protolog.common.ProtoLog;
 import com.android.internal.util.FrameworkStatsLog;
 import com.android.internal.util.ToBooleanFunction;
@@ -4681,7 +4680,7 @@
     }
 
     void onExitAnimationDone() {
-        if (ProtoLogImpl.isEnabled(WM_DEBUG_ANIM)) {
+        if (ProtoLog.isEnabled(WM_DEBUG_ANIM)) {
             final AnimationAdapter animationAdapter = mSurfaceAnimator.getAnimation();
             StringWriter sw = new StringWriter();
             if (animationAdapter != null) {
diff --git a/services/core/java/com/android/server/wm/WindowStateAnimator.java b/services/core/java/com/android/server/wm/WindowStateAnimator.java
index 6428591..7f7c249 100644
--- a/services/core/java/com/android/server/wm/WindowStateAnimator.java
+++ b/services/core/java/com/android/server/wm/WindowStateAnimator.java
@@ -60,7 +60,6 @@
 import android.view.animation.Animation;
 import android.view.animation.AnimationUtils;
 
-import com.android.internal.protolog.ProtoLogImpl;
 import com.android.internal.protolog.common.ProtoLog;
 import com.android.server.policy.WindowManagerPolicy;
 
@@ -584,7 +583,7 @@
                             mWin.mAttrs, attr, TRANSIT_OLD_NONE);
                 }
             }
-            if (ProtoLogImpl.isEnabled(WM_DEBUG_ANIM)) {
+            if (ProtoLog.isEnabled(WM_DEBUG_ANIM)) {
                 ProtoLog.v(WM_DEBUG_ANIM, "applyAnimation: win=%s"
                         + " anim=%d attr=0x%x a=%s transit=%d type=%d isEntrance=%b Callers %s",
                         this, anim, attr, a, transit, mAttrType, isEntrance, Debug.getCallers(20));
diff --git a/services/core/java/com/android/server/wm/WindowTracing.java b/services/core/java/com/android/server/wm/WindowTracing.java
index 416d042..424d504 100644
--- a/services/core/java/com/android/server/wm/WindowTracing.java
+++ b/services/core/java/com/android/server/wm/WindowTracing.java
@@ -35,7 +35,9 @@
 import android.util.proto.ProtoOutputStream;
 import android.view.Choreographer;
 
-import com.android.internal.protolog.ProtoLogImpl;
+import com.android.internal.protolog.LegacyProtoLogImpl;
+import com.android.internal.protolog.common.IProtoLog;
+import com.android.internal.protolog.common.ProtoLog;
 import com.android.internal.util.TraceBuffer;
 
 import java.io.File;
@@ -77,6 +79,8 @@
     private volatile boolean mEnabledLockFree;
     private boolean mScheduled;
 
+    private final IProtoLog mProtoLog;
+
     static WindowTracing createDefaultAndStartLooper(WindowManagerService service,
             Choreographer choreographer) {
         File file = new File(TRACE_FILENAME);
@@ -96,6 +100,7 @@
         mTraceFile = file;
         mBuffer = new TraceBuffer(bufferCapacity);
         setLogLevel(WindowTraceLogLevel.TRIM, null /* pw */);
+        mProtoLog = ProtoLog.getSingleInstance();
     }
 
     void startTrace(@Nullable PrintWriter pw) {
@@ -104,7 +109,6 @@
             return;
         }
         synchronized (mEnabledLock) {
-            ProtoLogImpl.getSingleInstance().startProtoLog(pw);
             logAndPrintln(pw, "Start tracing to " + mTraceFile + ".");
             mBuffer.resetBuffer();
             mEnabled = mEnabledLockFree = true;
@@ -132,7 +136,6 @@
             writeTraceToFileLocked();
             logAndPrintln(pw, "Trace written to " + mTraceFile + ".");
         }
-        ProtoLogImpl.getSingleInstance().stopProtoLog(pw, true);
     }
 
     /**
@@ -152,11 +155,15 @@
             logAndPrintln(pw, "Stop tracing to " + mTraceFile + ". Waiting for traces to flush.");
             writeTraceToFileLocked();
             logAndPrintln(pw, "Trace written to " + mTraceFile + ".");
-            ProtoLogImpl.getSingleInstance().stopProtoLog(pw, true);
+            if (!android.tracing.Flags.perfettoProtolog()) {
+                ((LegacyProtoLogImpl) mProtoLog).stopProtoLog(pw, true);
+            }
             logAndPrintln(pw, "Start tracing to " + mTraceFile + ".");
             mBuffer.resetBuffer();
             mEnabled = mEnabledLockFree = true;
-            ProtoLogImpl.getSingleInstance().startProtoLog(pw);
+            if (!android.tracing.Flags.perfettoProtolog()) {
+                ((LegacyProtoLogImpl) mProtoLog).startProtoLog(pw);
+            }
         }
     }
 
diff --git a/services/tests/wmtests/Android.bp b/services/tests/wmtests/Android.bp
index e83f03d..b292294 100644
--- a/services/tests/wmtests/Android.bp
+++ b/services/tests/wmtests/Android.bp
@@ -22,16 +22,21 @@
 genrule {
     name: "wmtests.protologsrc",
     srcs: [
+        ":protolog-impl",
         ":protolog-groups",
         ":wmtests-sources",
     ],
     tools: ["protologtool"],
     cmd: "$(location protologtool) transform-protolog-calls " +
         "--protolog-class com.android.internal.protolog.common.ProtoLog " +
-        "--protolog-impl-class com.android.internal.protolog.ProtoLogImpl " +
-        "--protolog-cache-class 'com.android.server.wm.ProtoLogCache' " +
         "--loggroups-class com.android.internal.protolog.ProtoLogGroup " +
         "--loggroups-jar $(location :protolog-groups) " +
+        // Used for the ProtoLogIntegrationTest, where don't test decoding or writing to file
+        // so the parameters below are irrelevant.
+        "--viewer-config-file-path /some/unused/file/path.pb " +
+        "--legacy-viewer-config-file-path /some/unused/file/path.json.gz " +
+        "--legacy-output-file-path /some/unused/file/path.winscope " +
+        // END of irrelevant params.
         "--output-srcjar $(out) " +
         "$(locations :wmtests-sources)",
     out: ["wmtests.protolog.srcjar"],
@@ -42,7 +47,7 @@
 
     // We only want this apk build for tests.
     srcs: [
-        ":wmtests.protologsrc",
+        ":wmtests-sources",
         "src/**/*.aidl",
     ],
 
diff --git a/services/tests/wmtests/src/com/android/server/wm/ProtoLogIntegrationTest.java b/services/tests/wmtests/src/com/android/server/wm/ProtoLogIntegrationTest.java
index af0d32c..c5bf78b 100644
--- a/services/tests/wmtests/src/com/android/server/wm/ProtoLogIntegrationTest.java
+++ b/services/tests/wmtests/src/com/android/server/wm/ProtoLogIntegrationTest.java
@@ -27,6 +27,8 @@
 
 import com.android.internal.protolog.ProtoLogGroup;
 import com.android.internal.protolog.ProtoLogImpl;
+import com.android.internal.protolog.common.IProtoLog;
+import com.android.internal.protolog.common.LogLevel;
 import com.android.internal.protolog.common.ProtoLog;
 
 import org.junit.After;
@@ -47,9 +49,9 @@
     @Ignore("b/163095037")
     @Test
     public void testProtoLogToolIntegration() {
-        ProtoLogImpl mockedProtoLog = mock(ProtoLogImpl.class);
+        IProtoLog mockedProtoLog = mock(IProtoLog.class);
         runWith(mockedProtoLog, this::testProtoLog);
-        verify(mockedProtoLog).log(eq(ProtoLogImpl.LogLevel.ERROR), eq(ProtoLogGroup.TEST_GROUP),
+        verify(mockedProtoLog).log(eq(LogLevel.ERROR), eq(ProtoLogGroup.TEST_GROUP),
                 anyInt(), eq(0b0010010111),
                 eq(com.android.internal.protolog.ProtoLogGroup.TEST_GROUP.isLogToLogcat()
                         ? "Test completed successfully: %b %d %x %f %% %s"
@@ -66,18 +68,13 @@
     /**
      * Starts protolog for the duration of {@code runnable}, with a ProtoLogImpl instance installed.
      */
-    private void runWith(ProtoLogImpl mockInstance, Runnable runnable) {
-        ProtoLogImpl original = ProtoLogImpl.getSingleInstance();
-        original.startProtoLog(null);
+    private void runWith(IProtoLog mockInstance, Runnable runnable) {
+        IProtoLog original = ProtoLog.getSingleInstance();
+        ProtoLogImpl.setSingleInstance(mockInstance);
         try {
-            ProtoLogImpl.setSingleInstance(mockInstance);
-            try {
-                runnable.run();
-            } finally {
-                ProtoLogImpl.setSingleInstance(original);
-            }
+            runnable.run();
         } finally {
-            original.stopProtoLog(null, false);
+            ProtoLogImpl.setSingleInstance(original);
         }
     }
 }
diff --git a/tests/Internal/Android.bp b/tests/Internal/Android.bp
index a487799..827ff4f 100644
--- a/tests/Internal/Android.bp
+++ b/tests/Internal/Android.bp
@@ -21,6 +21,9 @@
         "mockito-target-minus-junit4",
         "truth",
         "platform-test-annotations",
+        "flickerlib-parsers",
+        "perfetto_trace_java_protos",
+        "flickerlib-trace_processor_shell",
     ],
     java_resource_dirs: ["res"],
     certificate: "platform",
diff --git a/tests/Internal/AndroidManifest.xml b/tests/Internal/AndroidManifest.xml
index dbba245..9a3fe61 100644
--- a/tests/Internal/AndroidManifest.xml
+++ b/tests/Internal/AndroidManifest.xml
@@ -19,7 +19,11 @@
      package="com.android.internal.tests">
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
     <uses-permission android:name="android.permission.BIND_WALLPAPER"/>
-    <application>
+    <!-- Allow the test to connect to perfetto trace processor -->
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <application
+        android:requestLegacyExternalStorage="true"
+        android:networkSecurityConfig="@xml/network_security_config">
         <uses-library android:name="android.test.runner"/>
 
         <service android:name="stub.DummyWallpaperService"
diff --git a/tests/Internal/res/xml/network_security_config.xml b/tests/Internal/res/xml/network_security_config.xml
new file mode 100644
index 0000000..fdf1dbb
--- /dev/null
+++ b/tests/Internal/res/xml/network_security_config.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2024 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<network-security-config>
+    <domain-config cleartextTrafficPermitted="true">
+        <domain includeSubdomains="true">localhost</domain>
+    </domain-config>
+</network-security-config>
diff --git a/tests/Internal/src/com/android/internal/protolog/LegacyProtoLogImplTest.java b/tests/Internal/src/com/android/internal/protolog/LegacyProtoLogImplTest.java
new file mode 100644
index 0000000..a64996c
--- /dev/null
+++ b/tests/Internal/src/com/android/internal/protolog/LegacyProtoLogImplTest.java
@@ -0,0 +1,396 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.protolog;
+
+import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;
+
+import static com.android.internal.protolog.LegacyProtoLogImpl.PROTOLOG_VERSION;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.os.SystemClock;
+import android.platform.test.annotations.Presubmit;
+import android.util.proto.ProtoInputStream;
+
+import androidx.test.filters.SmallTest;
+
+import com.android.internal.protolog.common.IProtoLogGroup;
+import com.android.internal.protolog.common.LogLevel;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.MockitoAnnotations;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.PrintWriter;
+import java.util.LinkedList;
+
+/**
+ * Test class for {@link ProtoLogImpl}.
+ */
+@SuppressWarnings("ConstantConditions")
+@SmallTest
+@Presubmit
+@RunWith(JUnit4.class)
+public class LegacyProtoLogImplTest {
+
+    private static final byte[] MAGIC_HEADER = new byte[]{
+            0x9, 0x50, 0x52, 0x4f, 0x54, 0x4f, 0x4c, 0x4f, 0x47
+    };
+
+    private LegacyProtoLogImpl mProtoLog;
+    private File mFile;
+
+    @Mock
+    private LegacyProtoLogViewerConfigReader mReader;
+
+    private final String mViewerConfigFilename = "unused/file/path";
+
+    @Before
+    public void setUp() throws Exception {
+        MockitoAnnotations.initMocks(this);
+        final Context testContext = getInstrumentation().getContext();
+        mFile = testContext.getFileStreamPath("tracing_test.dat");
+        //noinspection ResultOfMethodCallIgnored
+        mFile.delete();
+        mProtoLog = new LegacyProtoLogImpl(mFile, mViewerConfigFilename,
+                1024 * 1024, mReader, 1024);
+    }
+
+    @After
+    public void tearDown() {
+        if (mFile != null) {
+            //noinspection ResultOfMethodCallIgnored
+            mFile.delete();
+        }
+        ProtoLogImpl.setSingleInstance(null);
+    }
+
+    @Test
+    public void isEnabled_returnsFalseByDefault() {
+        assertFalse(mProtoLog.isProtoEnabled());
+    }
+
+    @Test
+    public void isEnabled_returnsTrueAfterStart() {
+        mProtoLog.startProtoLog(mock(PrintWriter.class));
+        assertTrue(mProtoLog.isProtoEnabled());
+    }
+
+    @Test
+    public void isEnabled_returnsFalseAfterStop() {
+        mProtoLog.startProtoLog(mock(PrintWriter.class));
+        mProtoLog.stopProtoLog(mock(PrintWriter.class), true);
+        assertFalse(mProtoLog.isProtoEnabled());
+    }
+
+    @Test
+    public void logFile_startsWithMagicHeader() throws Exception {
+        mProtoLog.startProtoLog(mock(PrintWriter.class));
+        mProtoLog.stopProtoLog(mock(PrintWriter.class), true);
+
+        assertTrue("Log file should exist", mFile.exists());
+
+        byte[] header = new byte[MAGIC_HEADER.length];
+        try (InputStream is = new FileInputStream(mFile)) {
+            assertEquals(MAGIC_HEADER.length, is.read(header));
+            assertArrayEquals(MAGIC_HEADER, header);
+        }
+    }
+
+    @Test
+    public void log_logcatEnabledExternalMessage() {
+        when(mReader.getViewerString(anyLong())).thenReturn("test %b %d %% 0x%x %s %f");
+        LegacyProtoLogImpl implSpy = Mockito.spy(mProtoLog);
+        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(true);
+        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
+
+        implSpy.log(
+                LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234, 4321, null,
+                new Object[]{true, 10000, 30000, "test", 0.000003});
+
+        verify(implSpy).passToLogcat(eq(TestProtoLogGroup.TEST_GROUP.getTag()), eq(
+                LogLevel.INFO),
+                eq("test true 10000 % 0x7530 test 3.0E-6"));
+        verify(mReader).getViewerString(eq(1234L));
+    }
+
+    @Test
+    public void log_logcatEnabledInvalidMessage() {
+        when(mReader.getViewerString(anyLong())).thenReturn("test %b %d %% %x %s %f");
+        LegacyProtoLogImpl implSpy = Mockito.spy(mProtoLog);
+        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(true);
+        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
+
+        implSpy.log(
+                LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234, 4321, null,
+                new Object[]{true, 10000, 0.0001, 0.00002, "test"});
+
+        verify(implSpy).passToLogcat(eq(TestProtoLogGroup.TEST_GROUP.getTag()), eq(
+                LogLevel.INFO),
+                eq("UNKNOWN MESSAGE (1234) true 10000 1.0E-4 2.0E-5 test"));
+        verify(mReader).getViewerString(eq(1234L));
+    }
+
+    @Test
+    public void log_logcatEnabledInlineMessage() {
+        when(mReader.getViewerString(anyLong())).thenReturn("test %d");
+        LegacyProtoLogImpl implSpy = Mockito.spy(mProtoLog);
+        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(true);
+        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
+
+        implSpy.log(
+                LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234, 4321, "test %d",
+                new Object[]{5});
+
+        verify(implSpy).passToLogcat(eq(TestProtoLogGroup.TEST_GROUP.getTag()), eq(
+                LogLevel.INFO), eq("test 5"));
+        verify(mReader, never()).getViewerString(anyLong());
+    }
+
+    @Test
+    public void log_logcatEnabledNoMessage() {
+        when(mReader.getViewerString(anyLong())).thenReturn(null);
+        LegacyProtoLogImpl implSpy = Mockito.spy(mProtoLog);
+        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(true);
+        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
+
+        implSpy.log(
+                LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234, 4321, null,
+                new Object[]{5});
+
+        verify(implSpy).passToLogcat(eq(TestProtoLogGroup.TEST_GROUP.getTag()), eq(
+                LogLevel.INFO), eq("UNKNOWN MESSAGE (1234) 5"));
+        verify(mReader).getViewerString(eq(1234L));
+    }
+
+    @Test
+    public void log_logcatDisabled() {
+        when(mReader.getViewerString(anyLong())).thenReturn("test %d");
+        LegacyProtoLogImpl implSpy = Mockito.spy(mProtoLog);
+        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(false);
+        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
+
+        implSpy.log(
+                LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234, 4321, "test %d",
+                new Object[]{5});
+
+        verify(implSpy, never()).passToLogcat(any(), any(), any());
+        verify(mReader, never()).getViewerString(anyLong());
+    }
+
+    private static class ProtoLogData {
+        Long mMessageHash = null;
+        Long mElapsedTime = null;
+        LinkedList<String> mStrParams = new LinkedList<>();
+        LinkedList<Long> mSint64Params = new LinkedList<>();
+        LinkedList<Double> mDoubleParams = new LinkedList<>();
+        LinkedList<Boolean> mBooleanParams = new LinkedList<>();
+    }
+
+    private ProtoLogData readProtoLogSingle(ProtoInputStream ip) throws IOException {
+        while (ip.nextField() != ProtoInputStream.NO_MORE_FIELDS) {
+            if (ip.getFieldNumber() == (int) ProtoLogFileProto.VERSION) {
+                assertEquals(PROTOLOG_VERSION, ip.readString(ProtoLogFileProto.VERSION));
+                continue;
+            }
+            if (ip.getFieldNumber() != (int) ProtoLogFileProto.LOG) {
+                continue;
+            }
+            long token = ip.start(ProtoLogFileProto.LOG);
+            ProtoLogData data = new ProtoLogData();
+            while (ip.nextField() != ProtoInputStream.NO_MORE_FIELDS) {
+                switch (ip.getFieldNumber()) {
+                    case (int) ProtoLogMessage.MESSAGE_HASH: {
+                        data.mMessageHash = ip.readLong(ProtoLogMessage.MESSAGE_HASH);
+                        break;
+                    }
+                    case (int) ProtoLogMessage.ELAPSED_REALTIME_NANOS: {
+                        data.mElapsedTime = ip.readLong(ProtoLogMessage.ELAPSED_REALTIME_NANOS);
+                        break;
+                    }
+                    case (int) ProtoLogMessage.STR_PARAMS: {
+                        data.mStrParams.add(ip.readString(ProtoLogMessage.STR_PARAMS));
+                        break;
+                    }
+                    case (int) ProtoLogMessage.SINT64_PARAMS: {
+                        data.mSint64Params.add(ip.readLong(ProtoLogMessage.SINT64_PARAMS));
+                        break;
+                    }
+                    case (int) ProtoLogMessage.DOUBLE_PARAMS: {
+                        data.mDoubleParams.add(ip.readDouble(ProtoLogMessage.DOUBLE_PARAMS));
+                        break;
+                    }
+                    case (int) ProtoLogMessage.BOOLEAN_PARAMS: {
+                        data.mBooleanParams.add(ip.readBoolean(ProtoLogMessage.BOOLEAN_PARAMS));
+                        break;
+                    }
+                }
+            }
+            ip.end(token);
+            return data;
+        }
+        return null;
+    }
+
+    @Test
+    public void log_protoEnabled() throws Exception {
+        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(false);
+        TestProtoLogGroup.TEST_GROUP.setLogToProto(true);
+        mProtoLog.startProtoLog(mock(PrintWriter.class));
+        long before = SystemClock.elapsedRealtimeNanos();
+        mProtoLog.log(
+                LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234,
+                0b1110101001010100, null,
+                new Object[]{"test", 1, 2, 3, 0.4, 0.5, 0.6, true});
+        long after = SystemClock.elapsedRealtimeNanos();
+        mProtoLog.stopProtoLog(mock(PrintWriter.class), true);
+        try (InputStream is = new FileInputStream(mFile)) {
+            ProtoInputStream ip = new ProtoInputStream(is);
+            ProtoLogData data = readProtoLogSingle(ip);
+            assertNotNull(data);
+            assertEquals(1234, data.mMessageHash.longValue());
+            assertTrue(before <= data.mElapsedTime && data.mElapsedTime <= after);
+            assertArrayEquals(new String[]{"test"}, data.mStrParams.toArray());
+            assertArrayEquals(new Long[]{1L, 2L, 3L}, data.mSint64Params.toArray());
+            assertArrayEquals(new Double[]{0.4, 0.5, 0.6}, data.mDoubleParams.toArray());
+            assertArrayEquals(new Boolean[]{true}, data.mBooleanParams.toArray());
+        }
+    }
+
+    @Test
+    public void log_invalidParamsMask() throws Exception {
+        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(false);
+        TestProtoLogGroup.TEST_GROUP.setLogToProto(true);
+        mProtoLog.startProtoLog(mock(PrintWriter.class));
+        long before = SystemClock.elapsedRealtimeNanos();
+        mProtoLog.log(
+                LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234,
+                0b01100100, null,
+                new Object[]{"test", 1, 0.1, true});
+        long after = SystemClock.elapsedRealtimeNanos();
+        mProtoLog.stopProtoLog(mock(PrintWriter.class), true);
+        try (InputStream is = new FileInputStream(mFile)) {
+            ProtoInputStream ip = new ProtoInputStream(is);
+            ProtoLogData data = readProtoLogSingle(ip);
+            assertNotNull(data);
+            assertEquals(1234, data.mMessageHash.longValue());
+            assertTrue(before <= data.mElapsedTime && data.mElapsedTime <= after);
+            assertArrayEquals(new String[]{"test", "(INVALID PARAMS_MASK) true"},
+                    data.mStrParams.toArray());
+            assertArrayEquals(new Long[]{1L}, data.mSint64Params.toArray());
+            assertArrayEquals(new Double[]{0.1}, data.mDoubleParams.toArray());
+            assertArrayEquals(new Boolean[]{}, data.mBooleanParams.toArray());
+        }
+    }
+
+    @Test
+    public void log_protoDisabled() throws Exception {
+        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(false);
+        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
+        mProtoLog.startProtoLog(mock(PrintWriter.class));
+        mProtoLog.log(LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234,
+                0b11, null, new Object[]{true});
+        mProtoLog.stopProtoLog(mock(PrintWriter.class), true);
+        try (InputStream is = new FileInputStream(mFile)) {
+            ProtoInputStream ip = new ProtoInputStream(is);
+            ProtoLogData data = readProtoLogSingle(ip);
+            assertNull(data);
+        }
+    }
+
+    private enum TestProtoLogGroup implements IProtoLogGroup {
+        TEST_GROUP(true, true, false, "WindowManagetProtoLogTest");
+
+        private final boolean mEnabled;
+        private volatile boolean mLogToProto;
+        private volatile boolean mLogToLogcat;
+        private final String mTag;
+
+        /**
+         * @param enabled     set to false to exclude all log statements for this group from
+         *                    compilation,
+         *                    they will not be available in runtime.
+         * @param logToProto  enable binary logging for the group
+         * @param logToLogcat enable text logging for the group
+         * @param tag         name of the source of the logged message
+         */
+        TestProtoLogGroup(boolean enabled, boolean logToProto, boolean logToLogcat, String tag) {
+            this.mEnabled = enabled;
+            this.mLogToProto = logToProto;
+            this.mLogToLogcat = logToLogcat;
+            this.mTag = tag;
+        }
+
+        @Override
+        public boolean isEnabled() {
+            return mEnabled;
+        }
+
+        @Override
+        public boolean isLogToProto() {
+            return mLogToProto;
+        }
+
+        @Override
+        public boolean isLogToLogcat() {
+            return mLogToLogcat;
+        }
+
+        @Override
+        public boolean isLogToAny() {
+            return mLogToLogcat || mLogToProto;
+        }
+
+        @Override
+        public String getTag() {
+            return mTag;
+        }
+
+        @Override
+        public void setLogToProto(boolean logToProto) {
+            this.mLogToProto = logToProto;
+        }
+
+        @Override
+        public void setLogToLogcat(boolean logToLogcat) {
+            this.mLogToLogcat = logToLogcat;
+        }
+
+    }
+}
diff --git a/tests/Internal/src/com/android/internal/protolog/PerfettoDataSourceTest.java b/tests/Internal/src/com/android/internal/protolog/PerfettoDataSourceTest.java
new file mode 100644
index 0000000..b9f1738
--- /dev/null
+++ b/tests/Internal/src/com/android/internal/protolog/PerfettoDataSourceTest.java
@@ -0,0 +1,167 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.protolog;
+
+import static org.junit.Assert.assertThrows;
+import static org.junit.Assume.assumeTrue;
+
+import android.tracing.perfetto.CreateTlsStateArgs;
+import android.util.proto.ProtoInputStream;
+
+import com.android.internal.protolog.common.LogLevel;
+
+import com.google.common.truth.Truth;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mockito;
+
+import perfetto.protos.DataSourceConfigOuterClass;
+import perfetto.protos.ProtologCommon;
+import perfetto.protos.ProtologConfig;
+
+public class PerfettoDataSourceTest {
+    @Before
+    public void before() {
+        assumeTrue(android.tracing.Flags.perfettoProtolog());
+    }
+
+    @Test
+    public void noConfig() {
+        final ProtoLogDataSource.TlsState tlsState = createTlsState(
+                DataSourceConfigOuterClass.DataSourceConfig.newBuilder().build());
+
+        Truth.assertThat(tlsState.getLogFromLevel("SOME_TAG")).isEqualTo(LogLevel.WTF);
+        Truth.assertThat(tlsState.getShouldCollectStacktrace("SOME_TAG")).isFalse();
+    }
+
+    @Test
+    public void defaultTraceMode() {
+        final ProtoLogDataSource.TlsState tlsState = createTlsState(
+                DataSourceConfigOuterClass.DataSourceConfig.newBuilder()
+                        .setProtologConfig(
+                                ProtologConfig.ProtoLogConfig.newBuilder()
+                                        .setTracingMode(
+                                                ProtologConfig.ProtoLogConfig.TracingMode
+                                                        .ENABLE_ALL)
+                                        .build()
+                        ).build());
+
+        Truth.assertThat(tlsState.getLogFromLevel("SOME_TAG")).isEqualTo(LogLevel.DEBUG);
+        Truth.assertThat(tlsState.getShouldCollectStacktrace("SOME_TAG")).isFalse();
+    }
+
+    @Test
+    public void allEnabledTraceMode() {
+        final ProtoLogDataSource ds = new ProtoLogDataSource(() -> {}, () -> {}, () -> {});
+
+        final ProtoLogDataSource.TlsState tlsState = createTlsState(
+                DataSourceConfigOuterClass.DataSourceConfig.newBuilder().setProtologConfig(
+                        ProtologConfig.ProtoLogConfig.newBuilder()
+                                .setTracingMode(
+                                        ProtologConfig.ProtoLogConfig.TracingMode.ENABLE_ALL)
+                                .build()
+                ).build()
+        );
+
+        Truth.assertThat(tlsState.getLogFromLevel("SOME_TAG")).isEqualTo(LogLevel.DEBUG);
+        Truth.assertThat(tlsState.getShouldCollectStacktrace("SOME_TAG")).isFalse();
+    }
+
+    @Test
+    public void requireGroupTagInOverrides() {
+        Exception exception = assertThrows(RuntimeException.class, () -> {
+            createTlsState(DataSourceConfigOuterClass.DataSourceConfig.newBuilder()
+                    .setProtologConfig(
+                            ProtologConfig.ProtoLogConfig.newBuilder()
+                                    .addGroupOverrides(
+                                            ProtologConfig.ProtoLogGroup.newBuilder()
+                                                    .setLogFrom(
+                                                            ProtologCommon.ProtoLogLevel
+                                                                    .PROTOLOG_LEVEL_WARN)
+                                                    .setCollectStacktrace(true)
+                                    )
+                                    .build()
+                    ).build());
+        });
+
+        Truth.assertThat(exception).hasMessageThat().contains("group override without a group tag");
+    }
+
+    @Test
+    public void stackTraceCollection() {
+        final ProtoLogDataSource.TlsState tlsState = createTlsState(
+                DataSourceConfigOuterClass.DataSourceConfig.newBuilder().setProtologConfig(
+                        ProtologConfig.ProtoLogConfig.newBuilder()
+                                .addGroupOverrides(
+                                        ProtologConfig.ProtoLogGroup.newBuilder()
+                                                .setGroupName("SOME_TAG")
+                                                .setCollectStacktrace(true)
+                                )
+                                .build()
+                ).build());
+
+        Truth.assertThat(tlsState.getShouldCollectStacktrace("SOME_TAG")).isTrue();
+    }
+
+    @Test
+    public void groupLogFromOverrides() {
+        final ProtoLogDataSource.TlsState tlsState = createTlsState(
+                DataSourceConfigOuterClass.DataSourceConfig.newBuilder().setProtologConfig(
+                        ProtologConfig.ProtoLogConfig.newBuilder()
+                                .addGroupOverrides(
+                                        ProtologConfig.ProtoLogGroup.newBuilder()
+                                                .setGroupName("SOME_TAG")
+                                                .setLogFrom(
+                                                        ProtologCommon.ProtoLogLevel
+                                                                .PROTOLOG_LEVEL_DEBUG)
+                                                .setCollectStacktrace(true)
+                                )
+                                .addGroupOverrides(
+                                        ProtologConfig.ProtoLogGroup.newBuilder()
+                                                .setGroupName("SOME_OTHER_TAG")
+                                                .setLogFrom(
+                                                        ProtologCommon.ProtoLogLevel
+                                                                .PROTOLOG_LEVEL_WARN)
+                                )
+                                .build()
+                ).build());
+
+        Truth.assertThat(tlsState.getLogFromLevel("SOME_TAG")).isEqualTo(LogLevel.DEBUG);
+        Truth.assertThat(tlsState.getShouldCollectStacktrace("SOME_TAG")).isTrue();
+
+        Truth.assertThat(tlsState.getLogFromLevel("SOME_OTHER_TAG")).isEqualTo(LogLevel.WARN);
+        Truth.assertThat(tlsState.getShouldCollectStacktrace("SOME_OTHER_TAG")).isFalse();
+
+        Truth.assertThat(tlsState.getLogFromLevel("UNKNOWN_TAG")).isEqualTo(LogLevel.WTF);
+        Truth.assertThat(tlsState.getShouldCollectStacktrace("UNKNOWN_TAG")).isFalse();
+    }
+
+    private ProtoLogDataSource.TlsState createTlsState(
+            DataSourceConfigOuterClass.DataSourceConfig config) {
+        final ProtoLogDataSource ds =
+                Mockito.spy(new ProtoLogDataSource(() -> {}, () -> {}, () -> {}));
+
+        ProtoInputStream configStream = new ProtoInputStream(config.toByteArray());
+        final ProtoLogDataSource.Instance dsInstance = Mockito.spy(
+                ds.createInstance(configStream, 8));
+        Mockito.doNothing().when(dsInstance).release();
+        final CreateTlsStateArgs mockCreateTlsStateArgs = Mockito.mock(CreateTlsStateArgs.class);
+        Mockito.when(mockCreateTlsStateArgs.getDataSourceInstanceLocked()).thenReturn(dsInstance);
+        return ds.createTlsState(mockCreateTlsStateArgs);
+    }
+}
diff --git a/tests/Internal/src/com/android/internal/protolog/PerfettoProtoLogImplTest.java b/tests/Internal/src/com/android/internal/protolog/PerfettoProtoLogImplTest.java
new file mode 100644
index 0000000..4c31105
--- /dev/null
+++ b/tests/Internal/src/com/android/internal/protolog/PerfettoProtoLogImplTest.java
@@ -0,0 +1,586 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.internal.protolog;
+
+import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertThrows;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import static java.io.File.createTempFile;
+import static java.nio.file.Files.createTempDirectory;
+
+import android.content.Context;
+import android.os.SystemClock;
+import android.platform.test.annotations.Presubmit;
+import android.tools.common.ScenarioBuilder;
+import android.tools.common.traces.protolog.ProtoLogTrace;
+import android.tools.device.traces.TraceConfig;
+import android.tools.device.traces.TraceConfigs;
+import android.tools.device.traces.io.ResultReader;
+import android.tools.device.traces.io.ResultWriter;
+import android.tools.device.traces.monitors.PerfettoTraceMonitor;
+import android.tracing.perfetto.DataSource;
+import android.util.proto.ProtoInputStream;
+
+import androidx.test.filters.SmallTest;
+
+import com.android.internal.protolog.common.IProtoLogGroup;
+import com.android.internal.protolog.common.LogDataType;
+import com.android.internal.protolog.common.LogLevel;
+
+import com.google.common.truth.Truth;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+import org.mockito.Mockito;
+import org.mockito.MockitoAnnotations;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+import java.util.Random;
+
+import perfetto.protos.Protolog;
+import perfetto.protos.ProtologCommon;
+
+/**
+ * Test class for {@link ProtoLogImpl}.
+ */
+@SuppressWarnings("ConstantConditions")
+@SmallTest
+@Presubmit
+@RunWith(JUnit4.class)
+public class PerfettoProtoLogImplTest {
+    private final File mTracingDirectory = createTempDirectory("temp").toFile();
+
+    private final ResultWriter mWriter = new ResultWriter()
+            .forScenario(new ScenarioBuilder()
+                    .forClass(createTempFile("temp", "").getName()).build())
+            .withOutputDir(mTracingDirectory)
+            .setRunComplete();
+
+    private final TraceConfigs mTraceConfig = new TraceConfigs(
+            new TraceConfig(false, true, false),
+            new TraceConfig(false, true, false),
+            new TraceConfig(false, true, false),
+            new TraceConfig(false, true, false)
+    );
+
+    private PerfettoProtoLogImpl mProtoLog;
+    private Protolog.ProtoLogViewerConfig.Builder mViewerConfigBuilder;
+    private File mFile;
+
+    private ProtoLogViewerConfigReader mReader;
+
+    public PerfettoProtoLogImplTest() throws IOException {
+    }
+
+    @Before
+    public void setUp() throws Exception {
+        MockitoAnnotations.initMocks(this);
+        final Context testContext = getInstrumentation().getContext();
+        mFile = testContext.getFileStreamPath("tracing_test.dat");
+        //noinspection ResultOfMethodCallIgnored
+        mFile.delete();
+
+        mViewerConfigBuilder = Protolog.ProtoLogViewerConfig.newBuilder()
+                .addGroups(
+                        Protolog.ProtoLogViewerConfig.Group.newBuilder()
+                                .setId(1)
+                                .setName(TestProtoLogGroup.TEST_GROUP.toString())
+                                .setTag(TestProtoLogGroup.TEST_GROUP.getTag())
+                ).addMessages(
+                        Protolog.ProtoLogViewerConfig.MessageData.newBuilder()
+                                .setMessageId(1)
+                                .setMessage("My Test Debug Log Message %b")
+                                .setLevel(ProtologCommon.ProtoLogLevel.PROTOLOG_LEVEL_DEBUG)
+                                .setGroupId(1)
+                ).addMessages(
+                        Protolog.ProtoLogViewerConfig.MessageData.newBuilder()
+                                .setMessageId(2)
+                                .setMessage("My Test Verbose Log Message %b")
+                                .setLevel(ProtologCommon.ProtoLogLevel.PROTOLOG_LEVEL_VERBOSE)
+                                .setGroupId(1)
+                ).addMessages(
+                        Protolog.ProtoLogViewerConfig.MessageData.newBuilder()
+                                .setMessageId(3)
+                                .setMessage("My Test Warn Log Message %b")
+                                .setLevel(ProtologCommon.ProtoLogLevel.PROTOLOG_LEVEL_WARN)
+                                .setGroupId(1)
+                ).addMessages(
+                        Protolog.ProtoLogViewerConfig.MessageData.newBuilder()
+                                .setMessageId(4)
+                                .setMessage("My Test Error Log Message %b")
+                                .setLevel(ProtologCommon.ProtoLogLevel.PROTOLOG_LEVEL_ERROR)
+                                .setGroupId(1)
+                ).addMessages(
+                        Protolog.ProtoLogViewerConfig.MessageData.newBuilder()
+                                .setMessageId(5)
+                                .setMessage("My Test WTF Log Message %b")
+                                .setLevel(ProtologCommon.ProtoLogLevel.PROTOLOG_LEVEL_WTF)
+                                .setGroupId(1)
+                );
+
+        ViewerConfigInputStreamProvider viewerConfigInputStreamProvider = Mockito.mock(
+                ViewerConfigInputStreamProvider.class);
+        Mockito.when(viewerConfigInputStreamProvider.getInputStream())
+                .thenAnswer(it -> new ProtoInputStream(mViewerConfigBuilder.build().toByteArray()));
+
+        mReader = Mockito.spy(new ProtoLogViewerConfigReader(viewerConfigInputStreamProvider));
+        mProtoLog = new PerfettoProtoLogImpl(viewerConfigInputStreamProvider, mReader);
+    }
+
+    @After
+    public void tearDown() {
+        if (mFile != null) {
+            //noinspection ResultOfMethodCallIgnored
+            mFile.delete();
+        }
+        ProtoLogImpl.setSingleInstance(null);
+    }
+
+    @Test
+    public void isEnabled_returnsFalseByDefault() {
+        assertFalse(mProtoLog.isProtoEnabled());
+    }
+
+    @Test
+    public void isEnabled_returnsTrueAfterStart() {
+        PerfettoTraceMonitor traceMonitor =
+                PerfettoTraceMonitor.newBuilder().enableProtoLog().build();
+        try {
+            traceMonitor.start();
+            assertTrue(mProtoLog.isProtoEnabled());
+        } finally {
+            traceMonitor.stop(mWriter);
+        }
+    }
+
+    @Test
+    public void isEnabled_returnsFalseAfterStop() {
+        PerfettoTraceMonitor traceMonitor =
+                PerfettoTraceMonitor.newBuilder().enableProtoLog().build();
+        try {
+            traceMonitor.start();
+            assertTrue(mProtoLog.isProtoEnabled());
+        } finally {
+            traceMonitor.stop(mWriter);
+        }
+
+        assertFalse(mProtoLog.isProtoEnabled());
+    }
+
+    @Test
+    public void defaultMode() throws IOException {
+        PerfettoTraceMonitor traceMonitor =
+                PerfettoTraceMonitor.newBuilder().enableProtoLog(false).build();
+        try {
+            traceMonitor.start();
+            // Shouldn't be logging anything except WTF unless explicitly requested in the group
+            // override.
+            mProtoLog.log(LogLevel.DEBUG, TestProtoLogGroup.TEST_GROUP, 1,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.VERBOSE, TestProtoLogGroup.TEST_GROUP, 2,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.WARN, TestProtoLogGroup.TEST_GROUP, 3,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.ERROR, TestProtoLogGroup.TEST_GROUP, 4,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.WTF, TestProtoLogGroup.TEST_GROUP, 5,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+        } finally {
+            traceMonitor.stop(mWriter);
+        }
+
+        final ResultReader reader = new ResultReader(mWriter.write(), mTraceConfig);
+        final ProtoLogTrace protolog = reader.readProtoLogTrace();
+
+        Truth.assertThat(protolog.messages).hasSize(1);
+        Truth.assertThat(protolog.messages.getFirst().getLevel()).isEqualTo(LogLevel.WTF);
+    }
+
+    @Test
+    public void respectsOverrideConfigs_defaultMode() throws IOException {
+        PerfettoTraceMonitor traceMonitor =
+                PerfettoTraceMonitor.newBuilder().enableProtoLog(true,
+                        List.of(new PerfettoTraceMonitor.Builder.ProtoLogGroupOverride(
+                                TestProtoLogGroup.TEST_GROUP.toString(), LogLevel.DEBUG, true)))
+                        .build();
+        try {
+            traceMonitor.start();
+            mProtoLog.log(LogLevel.DEBUG, TestProtoLogGroup.TEST_GROUP, 1,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.VERBOSE, TestProtoLogGroup.TEST_GROUP, 2,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.WARN, TestProtoLogGroup.TEST_GROUP, 3,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.ERROR, TestProtoLogGroup.TEST_GROUP, 4,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.WTF, TestProtoLogGroup.TEST_GROUP, 5,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+        } finally {
+            traceMonitor.stop(mWriter);
+        }
+
+        final ResultReader reader = new ResultReader(mWriter.write(), mTraceConfig);
+        final ProtoLogTrace protolog = reader.readProtoLogTrace();
+
+        Truth.assertThat(protolog.messages).hasSize(5);
+        Truth.assertThat(protolog.messages.get(0).getLevel()).isEqualTo(LogLevel.DEBUG);
+        Truth.assertThat(protolog.messages.get(1).getLevel()).isEqualTo(LogLevel.VERBOSE);
+        Truth.assertThat(protolog.messages.get(2).getLevel()).isEqualTo(LogLevel.WARN);
+        Truth.assertThat(protolog.messages.get(3).getLevel()).isEqualTo(LogLevel.ERROR);
+        Truth.assertThat(protolog.messages.get(4).getLevel()).isEqualTo(LogLevel.WTF);
+    }
+
+    @Test
+    public void respectsOverrideConfigs_allEnabledMode() throws IOException {
+        PerfettoTraceMonitor traceMonitor =
+                PerfettoTraceMonitor.newBuilder().enableProtoLog(true,
+                        List.of(new PerfettoTraceMonitor.Builder.ProtoLogGroupOverride(
+                                TestProtoLogGroup.TEST_GROUP.toString(), LogLevel.WARN, false)))
+                        .build();
+        try {
+            traceMonitor.start();
+            mProtoLog.log(LogLevel.DEBUG, TestProtoLogGroup.TEST_GROUP, 1,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.VERBOSE, TestProtoLogGroup.TEST_GROUP, 2,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.WARN, TestProtoLogGroup.TEST_GROUP, 3,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.ERROR, TestProtoLogGroup.TEST_GROUP, 4,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.WTF, TestProtoLogGroup.TEST_GROUP, 5,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+        } finally {
+            traceMonitor.stop(mWriter);
+        }
+
+        final ResultReader reader = new ResultReader(mWriter.write(), mTraceConfig);
+        final ProtoLogTrace protolog = reader.readProtoLogTrace();
+
+        Truth.assertThat(protolog.messages).hasSize(3);
+        Truth.assertThat(protolog.messages.get(0).getLevel()).isEqualTo(LogLevel.WARN);
+        Truth.assertThat(protolog.messages.get(1).getLevel()).isEqualTo(LogLevel.ERROR);
+        Truth.assertThat(protolog.messages.get(2).getLevel()).isEqualTo(LogLevel.WTF);
+    }
+
+    @Test
+    public void respectsAllEnabledMode() throws IOException {
+        PerfettoTraceMonitor traceMonitor =
+                PerfettoTraceMonitor.newBuilder().enableProtoLog(true, List.of())
+                        .build();
+        try {
+            traceMonitor.start();
+            mProtoLog.log(LogLevel.DEBUG, TestProtoLogGroup.TEST_GROUP, 1,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.VERBOSE, TestProtoLogGroup.TEST_GROUP, 2,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.WARN, TestProtoLogGroup.TEST_GROUP, 3,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.ERROR, TestProtoLogGroup.TEST_GROUP, 4,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+            mProtoLog.log(LogLevel.WTF, TestProtoLogGroup.TEST_GROUP, 5,
+                    LogDataType.BOOLEAN, null, new Object[]{true});
+        } finally {
+            traceMonitor.stop(mWriter);
+        }
+
+        final ResultReader reader = new ResultReader(mWriter.write(), mTraceConfig);
+        final ProtoLogTrace protolog = reader.readProtoLogTrace();
+
+        Truth.assertThat(protolog.messages).hasSize(5);
+        Truth.assertThat(protolog.messages.get(0).getLevel()).isEqualTo(LogLevel.DEBUG);
+        Truth.assertThat(protolog.messages.get(1).getLevel()).isEqualTo(LogLevel.VERBOSE);
+        Truth.assertThat(protolog.messages.get(2).getLevel()).isEqualTo(LogLevel.WARN);
+        Truth.assertThat(protolog.messages.get(3).getLevel()).isEqualTo(LogLevel.ERROR);
+        Truth.assertThat(protolog.messages.get(4).getLevel()).isEqualTo(LogLevel.WTF);
+    }
+
+    @Test
+    public void log_logcatEnabledExternalMessage() {
+        when(mReader.getViewerString(anyLong())).thenReturn("test %b %d %% 0x%x %s %f");
+        PerfettoProtoLogImpl implSpy = Mockito.spy(mProtoLog);
+        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(true);
+        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
+
+        implSpy.log(
+                LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234, 4321, null,
+                new Object[]{true, 10000, 30000, "test", 0.000003});
+
+        verify(implSpy).passToLogcat(eq(TestProtoLogGroup.TEST_GROUP.getTag()), eq(
+                LogLevel.INFO),
+                eq("test true 10000 % 0x7530 test 3.0E-6"));
+        verify(mReader).getViewerString(eq(1234L));
+    }
+
+    @Test
+    public void log_logcatEnabledInvalidMessage() {
+        when(mReader.getViewerString(anyLong())).thenReturn("test %b %d %% %x %s %f");
+        PerfettoProtoLogImpl implSpy = Mockito.spy(mProtoLog);
+        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(true);
+        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
+
+        implSpy.log(
+                LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234, 4321, null,
+                new Object[]{true, 10000, 0.0001, 0.00002, "test"});
+
+        verify(implSpy).passToLogcat(eq(TestProtoLogGroup.TEST_GROUP.getTag()), eq(
+                LogLevel.INFO),
+                eq("UNKNOWN MESSAGE (1234) true 10000 1.0E-4 2.0E-5 test"));
+        verify(mReader).getViewerString(eq(1234L));
+    }
+
+    @Test
+    public void log_logcatEnabledInlineMessage() {
+        when(mReader.getViewerString(anyLong())).thenReturn("test %d");
+        PerfettoProtoLogImpl implSpy = Mockito.spy(mProtoLog);
+        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(true);
+        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
+
+        implSpy.log(
+                LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234, 4321, "test %d",
+                new Object[]{5});
+
+        verify(implSpy).passToLogcat(eq(TestProtoLogGroup.TEST_GROUP.getTag()), eq(
+                LogLevel.INFO), eq("test 5"));
+        verify(mReader, never()).getViewerString(anyLong());
+    }
+
+    @Test
+    public void log_logcatEnabledNoMessage() {
+        when(mReader.getViewerString(anyLong())).thenReturn(null);
+        PerfettoProtoLogImpl implSpy = Mockito.spy(mProtoLog);
+        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(true);
+        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
+
+        implSpy.log(
+                LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234, 4321, null,
+                new Object[]{5});
+
+        verify(implSpy).passToLogcat(eq(TestProtoLogGroup.TEST_GROUP.getTag()), eq(
+                LogLevel.INFO), eq("UNKNOWN MESSAGE (1234) 5"));
+        verify(mReader).getViewerString(eq(1234L));
+    }
+
+    @Test
+    public void log_logcatDisabled() {
+        when(mReader.getViewerString(anyLong())).thenReturn("test %d");
+        PerfettoProtoLogImpl implSpy = Mockito.spy(mProtoLog);
+        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(false);
+
+        implSpy.log(
+                LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234, 4321, "test %d",
+                new Object[]{5});
+
+        verify(implSpy, never()).passToLogcat(any(), any(), any());
+        verify(mReader, never()).getViewerString(anyLong());
+    }
+
+    @Test
+    public void log_protoEnabled() throws Exception {
+        final long messageHash = addMessageToConfig(
+                ProtologCommon.ProtoLogLevel.PROTOLOG_LEVEL_INFO,
+                "My test message :: %s, %d, %o, %x, %f, %e, %g, %b");
+
+        PerfettoTraceMonitor traceMonitor =
+                PerfettoTraceMonitor.newBuilder().enableProtoLog().build();
+        long before;
+        long after;
+        try {
+            traceMonitor.start();
+            assertTrue(mProtoLog.isProtoEnabled());
+
+            before = SystemClock.elapsedRealtimeNanos();
+            mProtoLog.log(
+                    LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, messageHash,
+                    0b1110101001010100, null,
+                    new Object[]{"test", 1, 2, 3, 0.4, 0.5, 0.6, true});
+            after = SystemClock.elapsedRealtimeNanos();
+        } finally {
+            traceMonitor.stop(mWriter);
+        }
+
+        final ResultReader reader = new ResultReader(mWriter.write(), mTraceConfig);
+        final ProtoLogTrace protolog = reader.readProtoLogTrace();
+
+        Truth.assertThat(protolog.messages).hasSize(1);
+        Truth.assertThat(protolog.messages.getFirst().getTimestamp().getElapsedNanos())
+                .isAtLeast(before);
+        Truth.assertThat(protolog.messages.getFirst().getTimestamp().getElapsedNanos())
+                .isAtMost(after);
+        Truth.assertThat(protolog.messages.getFirst().getMessage())
+                .isEqualTo("My test message :: test, 2, 4, 6, 0.400000, 5.000000e-01, 0.6, true");
+    }
+
+    private long addMessageToConfig(ProtologCommon.ProtoLogLevel logLevel, String message) {
+        final long messageId = new Random().nextLong();
+        mViewerConfigBuilder.addMessages(Protolog.ProtoLogViewerConfig.MessageData.newBuilder()
+                .setMessageId(messageId)
+                .setMessage(message)
+                .setLevel(logLevel)
+                .setGroupId(1)
+        );
+
+        return messageId;
+    }
+
+    @Test
+    public void log_invalidParamsMask() {
+        final long messageHash = addMessageToConfig(
+                ProtologCommon.ProtoLogLevel.PROTOLOG_LEVEL_INFO,
+                "My test message :: %s, %d, %f, %b");
+        PerfettoTraceMonitor traceMonitor =
+                PerfettoTraceMonitor.newBuilder().enableProtoLog().build();
+        long before;
+        long after;
+        try {
+            traceMonitor.start();
+            before = SystemClock.elapsedRealtimeNanos();
+            mProtoLog.log(
+                    LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, messageHash,
+                    0b01100100, null,
+                    new Object[]{"test", 1, 0.1, true});
+            after = SystemClock.elapsedRealtimeNanos();
+        } finally {
+            traceMonitor.stop(mWriter);
+        }
+
+        final ResultReader reader = new ResultReader(mWriter.write(), mTraceConfig);
+        assertThrows(IllegalStateException.class, reader::readProtoLogTrace);
+    }
+
+    @Test
+    public void log_protoDisabled() throws Exception {
+        PerfettoTraceMonitor traceMonitor =
+                PerfettoTraceMonitor.newBuilder().enableProtoLog(false).build();
+        try {
+            traceMonitor.start();
+            mProtoLog.log(LogLevel.DEBUG, TestProtoLogGroup.TEST_GROUP, 1,
+                    0b11, null, new Object[]{true});
+        } finally {
+            traceMonitor.stop(mWriter);
+        }
+
+        final ResultReader reader = new ResultReader(mWriter.write(), mTraceConfig);
+        final ProtoLogTrace protolog = reader.readProtoLogTrace();
+
+        Truth.assertThat(protolog.messages).isEmpty();
+    }
+
+    @Test
+    public void stackTraceTrimmed() throws IOException {
+        PerfettoTraceMonitor traceMonitor =
+                PerfettoTraceMonitor.newBuilder().enableProtoLog(true,
+                        List.of(new PerfettoTraceMonitor.Builder.ProtoLogGroupOverride(
+                                TestProtoLogGroup.TEST_GROUP.toString(), LogLevel.DEBUG, true)))
+                        .build();
+        try {
+            traceMonitor.start();
+
+            ProtoLogImpl.setSingleInstance(mProtoLog);
+            ProtoLogImpl.d(TestProtoLogGroup.TEST_GROUP, 1,
+                    0b11, null, true);
+        } finally {
+            traceMonitor.stop(mWriter);
+        }
+
+        final ResultReader reader = new ResultReader(mWriter.write(), mTraceConfig);
+        final ProtoLogTrace protolog = reader.readProtoLogTrace();
+
+        Truth.assertThat(protolog.messages).hasSize(1);
+        String stacktrace = protolog.messages.getFirst().getStacktrace();
+        Truth.assertThat(stacktrace)
+                .doesNotContain(PerfettoProtoLogImpl.class.getSimpleName() + ".java");
+        Truth.assertThat(stacktrace).doesNotContain(DataSource.class.getSimpleName() + ".java");
+        Truth.assertThat(stacktrace)
+                .doesNotContain(ProtoLogImpl.class.getSimpleName() + ".java");
+        Truth.assertThat(stacktrace).contains(PerfettoProtoLogImplTest.class.getSimpleName());
+        Truth.assertThat(stacktrace).contains("stackTraceTrimmed");
+    }
+
+    private enum TestProtoLogGroup implements IProtoLogGroup {
+        TEST_GROUP(true, true, false, "TEST_TAG");
+
+        private final boolean mEnabled;
+        private volatile boolean mLogToProto;
+        private volatile boolean mLogToLogcat;
+        private final String mTag;
+
+        /**
+         * @param enabled     set to false to exclude all log statements for this group from
+         *                    compilation,
+         *                    they will not be available in runtime.
+         * @param logToProto  enable binary logging for the group
+         * @param logToLogcat enable text logging for the group
+         * @param tag         name of the source of the logged message
+         */
+        TestProtoLogGroup(boolean enabled, boolean logToProto, boolean logToLogcat, String tag) {
+            this.mEnabled = enabled;
+            this.mLogToProto = logToProto;
+            this.mLogToLogcat = logToLogcat;
+            this.mTag = tag;
+        }
+
+        @Override
+        public boolean isEnabled() {
+            return mEnabled;
+        }
+
+        @Override
+        public boolean isLogToProto() {
+            return mLogToProto;
+        }
+
+        @Override
+        public boolean isLogToLogcat() {
+            return mLogToLogcat;
+        }
+
+        @Override
+        public boolean isLogToAny() {
+            return mLogToLogcat || mLogToProto;
+        }
+
+        @Override
+        public String getTag() {
+            return mTag;
+        }
+
+        @Override
+        public void setLogToProto(boolean logToProto) {
+            this.mLogToProto = logToProto;
+        }
+
+        @Override
+        public void setLogToLogcat(boolean logToLogcat) {
+            this.mLogToLogcat = logToLogcat;
+        }
+
+    }
+}
diff --git a/tests/Internal/src/com/android/internal/protolog/ProtoLogImplTest.java b/tests/Internal/src/com/android/internal/protolog/ProtoLogImplTest.java
index 7deb8c7..4267c2c 100644
--- a/tests/Internal/src/com/android/internal/protolog/ProtoLogImplTest.java
+++ b/tests/Internal/src/com/android/internal/protolog/ProtoLogImplTest.java
@@ -16,49 +16,23 @@
 
 package com.android.internal.protolog;
 
-import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;
-
-import static com.android.internal.protolog.ProtoLogImpl.PROTOLOG_VERSION;
-
-import static org.junit.Assert.assertArrayEquals;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertSame;
-import static org.junit.Assert.assertTrue;
-import static org.mockito.ArgumentMatchers.any;
-import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.verify;
-import static org.mockito.Mockito.when;
 
-import android.content.Context;
-import android.os.SystemClock;
 import android.platform.test.annotations.Presubmit;
-import android.util.proto.ProtoInputStream;
 
 import androidx.test.filters.SmallTest;
 
+import com.android.internal.protolog.common.IProtoLog;
 import com.android.internal.protolog.common.IProtoLogGroup;
+import com.android.internal.protolog.common.LogLevel;
 
 import org.junit.After;
-import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
-import org.mockito.Mock;
-import org.mockito.Mockito;
-import org.mockito.MockitoAnnotations;
-
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.PrintWriter;
-import java.util.LinkedList;
 
 /**
  * Test class for {@link ProtoLogImpl}.
@@ -68,336 +42,78 @@
 @Presubmit
 @RunWith(JUnit4.class)
 public class ProtoLogImplTest {
-
-    private static final byte[] MAGIC_HEADER = new byte[]{
-            0x9, 0x50, 0x52, 0x4f, 0x54, 0x4f, 0x4c, 0x4f, 0x47
-    };
-
-    private ProtoLogImpl mProtoLog;
-    private File mFile;
-
-    @Mock
-    private ProtoLogViewerConfigReader mReader;
-
-    @Before
-    public void setUp() throws Exception {
-        MockitoAnnotations.initMocks(this);
-        final Context testContext = getInstrumentation().getContext();
-        mFile = testContext.getFileStreamPath("tracing_test.dat");
-        //noinspection ResultOfMethodCallIgnored
-        mFile.delete();
-        mProtoLog = new ProtoLogImpl(mFile, 1024 * 1024, mReader, 1024);
-    }
-
     @After
     public void tearDown() {
-        if (mFile != null) {
-            //noinspection ResultOfMethodCallIgnored
-            mFile.delete();
-        }
         ProtoLogImpl.setSingleInstance(null);
     }
 
     @Test
-    public void isEnabled_returnsFalseByDefault() {
-        assertFalse(mProtoLog.isProtoEnabled());
-    }
-
-    @Test
-    public void isEnabled_returnsTrueAfterStart() {
-        mProtoLog.startProtoLog(mock(PrintWriter.class));
-        assertTrue(mProtoLog.isProtoEnabled());
-    }
-
-    @Test
-    public void isEnabled_returnsFalseAfterStop() {
-        mProtoLog.startProtoLog(mock(PrintWriter.class));
-        mProtoLog.stopProtoLog(mock(PrintWriter.class), true);
-        assertFalse(mProtoLog.isProtoEnabled());
-    }
-
-    @Test
-    public void logFile_startsWithMagicHeader() throws Exception {
-        mProtoLog.startProtoLog(mock(PrintWriter.class));
-        mProtoLog.stopProtoLog(mock(PrintWriter.class), true);
-
-        assertTrue("Log file should exist", mFile.exists());
-
-        byte[] header = new byte[MAGIC_HEADER.length];
-        try (InputStream is = new FileInputStream(mFile)) {
-            assertEquals(MAGIC_HEADER.length, is.read(header));
-            assertArrayEquals(MAGIC_HEADER, header);
-        }
-    }
-
-    @Test
     public void getSingleInstance() {
-        ProtoLogImpl mockedProtoLog = mock(ProtoLogImpl.class);
+        IProtoLog mockedProtoLog = mock(IProtoLog.class);
         ProtoLogImpl.setSingleInstance(mockedProtoLog);
         assertSame(mockedProtoLog, ProtoLogImpl.getSingleInstance());
     }
 
     @Test
     public void d_logCalled() {
-        ProtoLogImpl mockedProtoLog = mock(ProtoLogImpl.class);
+        IProtoLog mockedProtoLog = mock(IProtoLog.class);
         ProtoLogImpl.setSingleInstance(mockedProtoLog);
         ProtoLogImpl.d(TestProtoLogGroup.TEST_GROUP, 1234, 4321, "test %d");
-        verify(mockedProtoLog).log(eq(ProtoLogImpl.LogLevel.DEBUG), eq(
+        verify(mockedProtoLog).log(eq(LogLevel.DEBUG), eq(
                 TestProtoLogGroup.TEST_GROUP),
-                eq(1234), eq(4321), eq("test %d"), eq(new Object[]{}));
+                eq(1234L), eq(4321), eq("test %d"), eq(new Object[]{}));
     }
 
     @Test
     public void v_logCalled() {
-        ProtoLogImpl mockedProtoLog = mock(ProtoLogImpl.class);
+        IProtoLog mockedProtoLog = mock(IProtoLog.class);
         ProtoLogImpl.setSingleInstance(mockedProtoLog);
         ProtoLogImpl.v(TestProtoLogGroup.TEST_GROUP, 1234, 4321, "test %d");
-        verify(mockedProtoLog).log(eq(ProtoLogImpl.LogLevel.VERBOSE), eq(
+        verify(mockedProtoLog).log(eq(LogLevel.VERBOSE), eq(
                 TestProtoLogGroup.TEST_GROUP),
-                eq(1234), eq(4321), eq("test %d"), eq(new Object[]{}));
+                eq(1234L), eq(4321), eq("test %d"), eq(new Object[]{}));
     }
 
     @Test
     public void i_logCalled() {
-        ProtoLogImpl mockedProtoLog = mock(ProtoLogImpl.class);
+        IProtoLog mockedProtoLog = mock(IProtoLog.class);
         ProtoLogImpl.setSingleInstance(mockedProtoLog);
         ProtoLogImpl.i(TestProtoLogGroup.TEST_GROUP, 1234, 4321, "test %d");
-        verify(mockedProtoLog).log(eq(ProtoLogImpl.LogLevel.INFO), eq(
+        verify(mockedProtoLog).log(eq(LogLevel.INFO), eq(
                 TestProtoLogGroup.TEST_GROUP),
-                eq(1234), eq(4321), eq("test %d"), eq(new Object[]{}));
+                eq(1234L), eq(4321), eq("test %d"), eq(new Object[]{}));
     }
 
     @Test
     public void w_logCalled() {
-        ProtoLogImpl mockedProtoLog = mock(ProtoLogImpl.class);
+        IProtoLog mockedProtoLog = mock(IProtoLog.class);
         ProtoLogImpl.setSingleInstance(mockedProtoLog);
         ProtoLogImpl.w(TestProtoLogGroup.TEST_GROUP, 1234,
                 4321, "test %d");
-        verify(mockedProtoLog).log(eq(ProtoLogImpl.LogLevel.WARN), eq(
+        verify(mockedProtoLog).log(eq(LogLevel.WARN), eq(
                 TestProtoLogGroup.TEST_GROUP),
-                eq(1234), eq(4321), eq("test %d"), eq(new Object[]{}));
+                eq(1234L), eq(4321), eq("test %d"), eq(new Object[]{}));
     }
 
     @Test
     public void e_logCalled() {
-        ProtoLogImpl mockedProtoLog = mock(ProtoLogImpl.class);
+        IProtoLog mockedProtoLog = mock(IProtoLog.class);
         ProtoLogImpl.setSingleInstance(mockedProtoLog);
         ProtoLogImpl.e(TestProtoLogGroup.TEST_GROUP, 1234, 4321, "test %d");
-        verify(mockedProtoLog).log(eq(ProtoLogImpl.LogLevel.ERROR), eq(
+        verify(mockedProtoLog).log(eq(LogLevel.ERROR), eq(
                 TestProtoLogGroup.TEST_GROUP),
-                eq(1234), eq(4321), eq("test %d"), eq(new Object[]{}));
+                eq(1234L), eq(4321), eq("test %d"), eq(new Object[]{}));
     }
 
     @Test
     public void wtf_logCalled() {
-        ProtoLogImpl mockedProtoLog = mock(ProtoLogImpl.class);
+        IProtoLog mockedProtoLog = mock(IProtoLog.class);
         ProtoLogImpl.setSingleInstance(mockedProtoLog);
         ProtoLogImpl.wtf(TestProtoLogGroup.TEST_GROUP,
                 1234, 4321, "test %d");
-        verify(mockedProtoLog).log(eq(ProtoLogImpl.LogLevel.WTF), eq(
+        verify(mockedProtoLog).log(eq(LogLevel.WTF), eq(
                 TestProtoLogGroup.TEST_GROUP),
-                eq(1234), eq(4321), eq("test %d"), eq(new Object[]{}));
-    }
-
-    @Test
-    public void log_logcatEnabledExternalMessage() {
-        when(mReader.getViewerString(anyInt())).thenReturn("test %b %d %% 0x%x %s %f");
-        ProtoLogImpl implSpy = Mockito.spy(mProtoLog);
-        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(true);
-        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
-
-        implSpy.log(
-                ProtoLogImpl.LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234, 4321, null,
-                new Object[]{true, 10000, 30000, "test", 0.000003});
-
-        verify(implSpy).passToLogcat(eq(TestProtoLogGroup.TEST_GROUP.getTag()), eq(
-                ProtoLogImpl.LogLevel.INFO),
-                eq("test true 10000 % 0x7530 test 3.0E-6"));
-        verify(mReader).getViewerString(eq(1234));
-    }
-
-    @Test
-    public void log_logcatEnabledInvalidMessage() {
-        when(mReader.getViewerString(anyInt())).thenReturn("test %b %d %% %x %s %f");
-        ProtoLogImpl implSpy = Mockito.spy(mProtoLog);
-        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(true);
-        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
-
-        implSpy.log(
-                ProtoLogImpl.LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234, 4321, null,
-                new Object[]{true, 10000, 0.0001, 0.00002, "test"});
-
-        verify(implSpy).passToLogcat(eq(TestProtoLogGroup.TEST_GROUP.getTag()), eq(
-                ProtoLogImpl.LogLevel.INFO),
-                eq("UNKNOWN MESSAGE (1234) true 10000 1.0E-4 2.0E-5 test"));
-        verify(mReader).getViewerString(eq(1234));
-    }
-
-    @Test
-    public void log_logcatEnabledInlineMessage() {
-        when(mReader.getViewerString(anyInt())).thenReturn("test %d");
-        ProtoLogImpl implSpy = Mockito.spy(mProtoLog);
-        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(true);
-        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
-
-        implSpy.log(
-                ProtoLogImpl.LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234, 4321, "test %d",
-                new Object[]{5});
-
-        verify(implSpy).passToLogcat(eq(TestProtoLogGroup.TEST_GROUP.getTag()), eq(
-                ProtoLogImpl.LogLevel.INFO), eq("test 5"));
-        verify(mReader, never()).getViewerString(anyInt());
-    }
-
-    @Test
-    public void log_logcatEnabledNoMessage() {
-        when(mReader.getViewerString(anyInt())).thenReturn(null);
-        ProtoLogImpl implSpy = Mockito.spy(mProtoLog);
-        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(true);
-        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
-
-        implSpy.log(
-                ProtoLogImpl.LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234, 4321, null,
-                new Object[]{5});
-
-        verify(implSpy).passToLogcat(eq(TestProtoLogGroup.TEST_GROUP.getTag()), eq(
-                ProtoLogImpl.LogLevel.INFO), eq("UNKNOWN MESSAGE (1234) 5"));
-        verify(mReader).getViewerString(eq(1234));
-    }
-
-    @Test
-    public void log_logcatDisabled() {
-        when(mReader.getViewerString(anyInt())).thenReturn("test %d");
-        ProtoLogImpl implSpy = Mockito.spy(mProtoLog);
-        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(false);
-        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
-
-        implSpy.log(
-                ProtoLogImpl.LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234, 4321, "test %d",
-                new Object[]{5});
-
-        verify(implSpy, never()).passToLogcat(any(), any(), any());
-        verify(mReader, never()).getViewerString(anyInt());
-    }
-
-    private static class ProtoLogData {
-        Integer mMessageHash = null;
-        Long mElapsedTime = null;
-        LinkedList<String> mStrParams = new LinkedList<>();
-        LinkedList<Long> mSint64Params = new LinkedList<>();
-        LinkedList<Double> mDoubleParams = new LinkedList<>();
-        LinkedList<Boolean> mBooleanParams = new LinkedList<>();
-    }
-
-    private ProtoLogData readProtoLogSingle(ProtoInputStream ip) throws IOException {
-        while (ip.nextField() != ProtoInputStream.NO_MORE_FIELDS) {
-            if (ip.getFieldNumber() == (int) ProtoLogFileProto.VERSION) {
-                assertEquals(PROTOLOG_VERSION, ip.readString(ProtoLogFileProto.VERSION));
-                continue;
-            }
-            if (ip.getFieldNumber() != (int) ProtoLogFileProto.LOG) {
-                continue;
-            }
-            long token = ip.start(ProtoLogFileProto.LOG);
-            ProtoLogData data = new ProtoLogData();
-            while (ip.nextField() != ProtoInputStream.NO_MORE_FIELDS) {
-                switch (ip.getFieldNumber()) {
-                    case (int) ProtoLogMessage.MESSAGE_HASH: {
-                        data.mMessageHash = ip.readInt(ProtoLogMessage.MESSAGE_HASH);
-                        break;
-                    }
-                    case (int) ProtoLogMessage.ELAPSED_REALTIME_NANOS: {
-                        data.mElapsedTime = ip.readLong(ProtoLogMessage.ELAPSED_REALTIME_NANOS);
-                        break;
-                    }
-                    case (int) ProtoLogMessage.STR_PARAMS: {
-                        data.mStrParams.add(ip.readString(ProtoLogMessage.STR_PARAMS));
-                        break;
-                    }
-                    case (int) ProtoLogMessage.SINT64_PARAMS: {
-                        data.mSint64Params.add(ip.readLong(ProtoLogMessage.SINT64_PARAMS));
-                        break;
-                    }
-                    case (int) ProtoLogMessage.DOUBLE_PARAMS: {
-                        data.mDoubleParams.add(ip.readDouble(ProtoLogMessage.DOUBLE_PARAMS));
-                        break;
-                    }
-                    case (int) ProtoLogMessage.BOOLEAN_PARAMS: {
-                        data.mBooleanParams.add(ip.readBoolean(ProtoLogMessage.BOOLEAN_PARAMS));
-                        break;
-                    }
-                }
-            }
-            ip.end(token);
-            return data;
-        }
-        return null;
-    }
-
-    @Test
-    public void log_protoEnabled() throws Exception {
-        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(false);
-        TestProtoLogGroup.TEST_GROUP.setLogToProto(true);
-        mProtoLog.startProtoLog(mock(PrintWriter.class));
-        long before = SystemClock.elapsedRealtimeNanos();
-        mProtoLog.log(
-                ProtoLogImpl.LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234,
-                0b1110101001010100, null,
-                new Object[]{"test", 1, 2, 3, 0.4, 0.5, 0.6, true});
-        long after = SystemClock.elapsedRealtimeNanos();
-        mProtoLog.stopProtoLog(mock(PrintWriter.class), true);
-        try (InputStream is = new FileInputStream(mFile)) {
-            ProtoInputStream ip = new ProtoInputStream(is);
-            ProtoLogData data = readProtoLogSingle(ip);
-            assertNotNull(data);
-            assertEquals(1234, data.mMessageHash.longValue());
-            assertTrue(before <= data.mElapsedTime && data.mElapsedTime <= after);
-            assertArrayEquals(new String[]{"test"}, data.mStrParams.toArray());
-            assertArrayEquals(new Long[]{1L, 2L, 3L}, data.mSint64Params.toArray());
-            assertArrayEquals(new Double[]{0.4, 0.5, 0.6}, data.mDoubleParams.toArray());
-            assertArrayEquals(new Boolean[]{true}, data.mBooleanParams.toArray());
-        }
-    }
-
-    @Test
-    public void log_invalidParamsMask() throws Exception {
-        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(false);
-        TestProtoLogGroup.TEST_GROUP.setLogToProto(true);
-        mProtoLog.startProtoLog(mock(PrintWriter.class));
-        long before = SystemClock.elapsedRealtimeNanos();
-        mProtoLog.log(
-                ProtoLogImpl.LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234,
-                0b01100100, null,
-                new Object[]{"test", 1, 0.1, true});
-        long after = SystemClock.elapsedRealtimeNanos();
-        mProtoLog.stopProtoLog(mock(PrintWriter.class), true);
-        try (InputStream is = new FileInputStream(mFile)) {
-            ProtoInputStream ip = new ProtoInputStream(is);
-            ProtoLogData data = readProtoLogSingle(ip);
-            assertNotNull(data);
-            assertEquals(1234, data.mMessageHash.longValue());
-            assertTrue(before <= data.mElapsedTime && data.mElapsedTime <= after);
-            assertArrayEquals(new String[]{"test", "(INVALID PARAMS_MASK) true"},
-                    data.mStrParams.toArray());
-            assertArrayEquals(new Long[]{1L}, data.mSint64Params.toArray());
-            assertArrayEquals(new Double[]{0.1}, data.mDoubleParams.toArray());
-            assertArrayEquals(new Boolean[]{}, data.mBooleanParams.toArray());
-        }
-    }
-
-    @Test
-    public void log_protoDisabled() throws Exception {
-        TestProtoLogGroup.TEST_GROUP.setLogToLogcat(false);
-        TestProtoLogGroup.TEST_GROUP.setLogToProto(false);
-        mProtoLog.startProtoLog(mock(PrintWriter.class));
-        mProtoLog.log(ProtoLogImpl.LogLevel.INFO, TestProtoLogGroup.TEST_GROUP, 1234,
-                0b11, null, new Object[]{true});
-        mProtoLog.stopProtoLog(mock(PrintWriter.class), true);
-        try (InputStream is = new FileInputStream(mFile)) {
-            ProtoInputStream ip = new ProtoInputStream(is);
-            ProtoLogData data = readProtoLogSingle(ip);
-            assertNull(data);
-        }
+                eq(1234L), eq(4321), eq("test %d"), eq(new Object[]{}));
     }
 
     private enum TestProtoLogGroup implements IProtoLogGroup {
diff --git a/tests/Internal/src/com/android/internal/protolog/ProtoLogViewerConfigReaderTest.java b/tests/Internal/src/com/android/internal/protolog/ProtoLogViewerConfigReaderTest.java
index ae50216..dbd85d3 100644
--- a/tests/Internal/src/com/android/internal/protolog/ProtoLogViewerConfigReaderTest.java
+++ b/tests/Internal/src/com/android/internal/protolog/ProtoLogViewerConfigReaderTest.java
@@ -72,8 +72,8 @@
             + "}\n";
 
 
-    private ProtoLogViewerConfigReader
-            mConfig = new ProtoLogViewerConfigReader();
+    private LegacyProtoLogViewerConfigReader
+            mConfig = new LegacyProtoLogViewerConfigReader();
     private File mTestViewerConfig;
 
     @Before
@@ -98,7 +98,7 @@
 
     @Test
     public void loadViewerConfig() {
-        mConfig.loadViewerConfig(null, mTestViewerConfig.getAbsolutePath());
+        mConfig.loadViewerConfig(msg -> {}, mTestViewerConfig.getAbsolutePath());
         assertEquals("Test completed successfully: %b", mConfig.getViewerString(70933285));
         assertEquals("Test 2", mConfig.getViewerString(1352021864));
         assertEquals("Window %s is already added", mConfig.getViewerString(409412266));
@@ -107,7 +107,7 @@
 
     @Test
     public void loadViewerConfig_invalidFile() {
-        mConfig.loadViewerConfig(null, "/tmp/unknown/file/does/not/exist");
+        mConfig.loadViewerConfig(msg -> {}, "/tmp/unknown/file/does/not/exist");
         // No exception is thrown.
         assertNull(mConfig.getViewerString(1));
     }
diff --git a/tools/protologtool/Android.bp b/tools/protologtool/Android.bp
index 46745e9..8fbc3e8 100644
--- a/tools/protologtool/Android.bp
+++ b/tools/protologtool/Android.bp
@@ -11,12 +11,13 @@
     name: "protologtool-lib",
     srcs: [
         "src/com/android/protolog/tool/**/*.kt",
-        ":protolog-common-no-android-src",
+        ":protolog-common-src",
     ],
     static_libs: [
         "javaparser",
         "platformprotos",
         "jsonlib",
+        "perfetto_trace-full",
     ],
 }
 
@@ -42,5 +43,6 @@
         "junit",
         "mockito",
         "objenesis",
+        "truth",
     ],
 }
diff --git a/tools/protologtool/README.md b/tools/protologtool/README.md
index ba63957..24a4861 100644
--- a/tools/protologtool/README.md
+++ b/tools/protologtool/README.md
@@ -8,11 +8,13 @@
 
 ### Code transformation
 
-Command: `protologtool transform-protolog-calls 
-    --protolog-class <protolog class name> 
-    --protolog-impl-class <protolog implementation class name>
+Command: `protologtool transform-protolog-calls
+    --protolog-class <protolog class name>
     --loggroups-class <protolog groups class name>
     --loggroups-jar <config jar path>
+    --viewer-config-file-path <protobuf viewer config file path>
+    --legacy-viewer-config-file-path <legacy json.gz viewer config file path>
+    --legacy-output-file-path <.winscope file path to write the legacy trace to>
     --output-srcjar <output.srcjar>
     [<input.java>]`
 
@@ -44,10 +46,11 @@
 ### Viewer config generation
 
 Command: `generate-viewer-config
-    --protolog-class <protolog class name> 
+    --protolog-class <protolog class name>
     --loggroups-class <protolog groups class name>
     --loggroups-jar <config jar path>
-    --viewer-conf <viewer.json>
+    --viewer-config-type <proto|json>
+    --viewer-config <viewer.json>
     [<input.java>]`
 
 This command is similar in it's syntax to the previous one, only instead of creating a processed source jar
@@ -74,7 +77,7 @@
 
 ### Binary log viewing
 
-Command: `read-log --viewer-conf <viewer.json> <wm_log.pb>`
+Command: `read-log --viewer-config <viewer.json> <wm_log.pb>`
 
 Reads the binary ProtoLog log file and outputs a human-readable LogCat-like text log.
 
diff --git a/tools/protologtool/src/com/android/protolog/tool/CodeUtils.kt b/tools/protologtool/src/com/android/protolog/tool/CodeUtils.kt
index 07c6fd3..3d1dec2 100644
--- a/tools/protologtool/src/com/android/protolog/tool/CodeUtils.kt
+++ b/tools/protologtool/src/com/android/protolog/tool/CodeUtils.kt
@@ -22,15 +22,21 @@
 import com.github.javaparser.ast.expr.BinaryExpr
 import com.github.javaparser.ast.expr.Expression
 import com.github.javaparser.ast.expr.StringLiteralExpr
+import java.util.UUID
 
 object CodeUtils {
     /**
      * Returns a stable hash of a string.
      * We reimplement String::hashCode() for readability reasons.
      */
-    fun hash(position: String, messageString: String, logLevel: LogLevel, logGroup: LogGroup): Int {
-        return (position + messageString + logLevel.name + logGroup.name)
-                .map { c -> c.code }.reduce { h, c -> h * 31 + c }
+    fun hash(
+        position: String,
+        messageString: String,
+        logLevel: LogLevel,
+        logGroup: LogGroup
+    ): Long {
+        val fullStringIdentifier = position + messageString + logLevel.name + logGroup.name
+        return UUID.nameUUIDFromBytes(fullStringIdentifier.toByteArray()).mostSignificantBits
     }
 
     fun checkWildcardStaticImported(code: CompilationUnit, className: String, fileName: String) {
diff --git a/tools/protologtool/src/com/android/protolog/tool/CommandOptions.kt b/tools/protologtool/src/com/android/protolog/tool/CommandOptions.kt
index bfbbf7a..a359155 100644
--- a/tools/protologtool/src/com/android/protolog/tool/CommandOptions.kt
+++ b/tools/protologtool/src/com/android/protolog/tool/CommandOptions.kt
@@ -26,32 +26,35 @@
         private val commands = setOf(TRANSFORM_CALLS_CMD, GENERATE_CONFIG_CMD, READ_LOG_CMD)
 
         private const val PROTOLOG_CLASS_PARAM = "--protolog-class"
-        private const val PROTOLOGIMPL_CLASS_PARAM = "--protolog-impl-class"
-        private const val PROTOLOGCACHE_CLASS_PARAM = "--protolog-cache-class"
         private const val PROTOLOGGROUP_CLASS_PARAM = "--loggroups-class"
         private const val PROTOLOGGROUP_JAR_PARAM = "--loggroups-jar"
-        private const val VIEWER_CONFIG_JSON_PARAM = "--viewer-conf"
+        private const val VIEWER_CONFIG_PARAM = "--viewer-config"
+        private const val VIEWER_CONFIG_TYPE_PARAM = "--viewer-config-type"
         private const val OUTPUT_SOURCE_JAR_PARAM = "--output-srcjar"
-        private val parameters = setOf(PROTOLOG_CLASS_PARAM, PROTOLOGIMPL_CLASS_PARAM,
-                PROTOLOGCACHE_CLASS_PARAM, PROTOLOGGROUP_CLASS_PARAM, PROTOLOGGROUP_JAR_PARAM,
-                VIEWER_CONFIG_JSON_PARAM, OUTPUT_SOURCE_JAR_PARAM)
+        private const val VIEWER_CONFIG_FILE_PATH_PARAM = "--viewer-config-file-path"
+        // TODO(b/324128613): Remove these legacy options once we fully flip the Perfetto protolog flag
+        private const val LEGACY_VIEWER_CONFIG_FILE_PATH_PARAM = "--legacy-viewer-config-file-path"
+        private const val LEGACY_OUTPUT_FILE_PATH = "--legacy-output-file-path"
+        private val parameters = setOf(PROTOLOG_CLASS_PARAM, PROTOLOGGROUP_CLASS_PARAM,
+            PROTOLOGGROUP_JAR_PARAM, VIEWER_CONFIG_PARAM, VIEWER_CONFIG_TYPE_PARAM,
+            OUTPUT_SOURCE_JAR_PARAM, VIEWER_CONFIG_FILE_PATH_PARAM,
+            LEGACY_VIEWER_CONFIG_FILE_PATH_PARAM, LEGACY_OUTPUT_FILE_PATH)
 
         val USAGE = """
             Usage: ${Constants.NAME} <command> [<args>]
             Available commands:
 
-            $TRANSFORM_CALLS_CMD $PROTOLOG_CLASS_PARAM <class name> $PROTOLOGIMPL_CLASS_PARAM
-                <class name> $PROTOLOGCACHE_CLASS_PARAM
-                <class name> $PROTOLOGGROUP_CLASS_PARAM <class name> $PROTOLOGGROUP_JAR_PARAM
-                <config.jar> $OUTPUT_SOURCE_JAR_PARAM <output.srcjar> [<input.java>]
+            $TRANSFORM_CALLS_CMD $PROTOLOG_CLASS_PARAM <class name>
+                $PROTOLOGGROUP_CLASS_PARAM <class name> $PROTOLOGGROUP_JAR_PARAM <config.jar>
+                $OUTPUT_SOURCE_JAR_PARAM <output.srcjar> [<input.java>]
             - processes java files replacing stub calls with logging code.
 
-            $GENERATE_CONFIG_CMD $PROTOLOG_CLASS_PARAM <class name> $PROTOLOGGROUP_CLASS_PARAM
-                <class name> $PROTOLOGGROUP_JAR_PARAM <config.jar> $VIEWER_CONFIG_JSON_PARAM
-                <viewer.json> [<input.java>]
+            $GENERATE_CONFIG_CMD $PROTOLOG_CLASS_PARAM <class name>
+                $PROTOLOGGROUP_CLASS_PARAM <class name> $PROTOLOGGROUP_JAR_PARAM <config.jar>
+                $VIEWER_CONFIG_PARAM <viewer.json|viewer.pb> [<input.java>]
             - creates viewer config file from given java files.
 
-            $READ_LOG_CMD $VIEWER_CONFIG_JSON_PARAM <viewer.json> <wm_log.pb>
+            $READ_LOG_CMD $VIEWER_CONFIG_PARAM <viewer.json|viewer.pb> <wm_log.pb>
             - translates a binary log to a readable format.
         """.trimIndent()
 
@@ -69,6 +72,13 @@
             return params.getValue(paramName)
         }
 
+        private fun getOptionalParam(paramName: String, params: Map<String, String>): String? {
+            if (!params.containsKey(paramName)) {
+                return null
+            }
+            return params.getValue(paramName)
+        }
+
         private fun validateNotSpecified(paramName: String, params: Map<String, String>): String {
             if (params.containsKey(paramName)) {
                 throw InvalidCommandException("Unsupported param $paramName")
@@ -90,9 +100,43 @@
             return name
         }
 
-        private fun validateJSONName(name: String): String {
-            if (!name.endsWith(".json")) {
-                throw InvalidCommandException("Json file required, got $name instead")
+        private fun validateViewerConfigFilePath(name: String): String {
+            if (!name.endsWith(".pb")) {
+                throw InvalidCommandException("Proto file (ending with .pb) required, " +
+                        "got $name instead")
+            }
+            return name
+        }
+
+        private fun validateLegacyViewerConfigFilePath(name: String): String {
+            if (!name.endsWith(".json.gz")) {
+                throw InvalidCommandException("GZiped Json file (ending with .json.gz) required, " +
+                        "got $name instead")
+            }
+            return name
+        }
+
+        private fun validateOutputFilePath(name: String): String {
+            if (!name.endsWith(".winscope")) {
+                throw InvalidCommandException("Winscope file (ending with .winscope) required, " +
+                        "got $name instead")
+            }
+            return name
+        }
+
+        private fun validateConfigFileName(name: String): String {
+            if (!name.endsWith(".json") && !name.endsWith(".pb")) {
+                throw InvalidCommandException("Json file (ending with .json) or proto file " +
+                        "(ending with .pb) required, got $name instead")
+            }
+            return name
+        }
+
+        private fun validateConfigType(name: String): String {
+            val validType = listOf("json", "proto")
+            if (!validType.contains(name)) {
+                throw InvalidCommandException("Unexpected config file type. " +
+                        "Expected on of [${validType.joinToString()}], but got $name")
             }
             return name
         }
@@ -102,8 +146,8 @@
                 throw InvalidCommandException("No java source input files")
             }
             list.forEach { name ->
-                if (!name.endsWith(".java")) {
-                    throw InvalidCommandException("Not a java source file $name")
+                if (!name.endsWith(".java") && !name.endsWith(".kt")) {
+                    throw InvalidCommandException("Not a java or kotlin source file $name")
                 }
             }
             return list
@@ -122,12 +166,14 @@
 
     val protoLogClassNameArg: String
     val protoLogGroupsClassNameArg: String
-    val protoLogImplClassNameArg: String
-    val protoLogCacheClassNameArg: String
     val protoLogGroupsJarArg: String
-    val viewerConfigJsonArg: String
+    val viewerConfigFileNameArg: String
+    val viewerConfigTypeArg: String
     val outputSourceJarArg: String
     val logProtofileArg: String
+    val viewerConfigFilePathArg: String
+    val legacyViewerConfigFilePathArg: String?
+    val legacyOutputFilePath: String?
     val javaSourceArgs: List<String>
     val command: String
 
@@ -169,38 +215,55 @@
         when (command) {
             TRANSFORM_CALLS_CMD -> {
                 protoLogClassNameArg = validateClassName(getParam(PROTOLOG_CLASS_PARAM, params))
-                protoLogGroupsClassNameArg = validateClassName(getParam(PROTOLOGGROUP_CLASS_PARAM,
-                        params))
-                protoLogImplClassNameArg = validateClassName(getParam(PROTOLOGIMPL_CLASS_PARAM,
-                        params))
-                protoLogCacheClassNameArg = validateClassName(getParam(PROTOLOGCACHE_CLASS_PARAM,
-                        params))
+                protoLogGroupsClassNameArg =
+                    validateClassName(getParam(PROTOLOGGROUP_CLASS_PARAM, params))
                 protoLogGroupsJarArg = validateJarName(getParam(PROTOLOGGROUP_JAR_PARAM, params))
-                viewerConfigJsonArg = validateNotSpecified(VIEWER_CONFIG_JSON_PARAM, params)
+                viewerConfigFileNameArg = validateNotSpecified(VIEWER_CONFIG_PARAM, params)
+                viewerConfigTypeArg = validateNotSpecified(VIEWER_CONFIG_TYPE_PARAM, params)
                 outputSourceJarArg = validateSrcJarName(getParam(OUTPUT_SOURCE_JAR_PARAM, params))
+                viewerConfigFilePathArg = validateViewerConfigFilePath(
+                    getParam(VIEWER_CONFIG_FILE_PATH_PARAM, params))
+                legacyViewerConfigFilePathArg =
+                    getOptionalParam(LEGACY_VIEWER_CONFIG_FILE_PATH_PARAM, params)?.let {
+                        validateLegacyViewerConfigFilePath(it)
+                    }
+                legacyOutputFilePath =
+                    getOptionalParam(LEGACY_OUTPUT_FILE_PATH, params)?.let {
+                        validateOutputFilePath(it)
+                    }
                 javaSourceArgs = validateJavaInputList(inputFiles)
                 logProtofileArg = ""
             }
             GENERATE_CONFIG_CMD -> {
                 protoLogClassNameArg = validateClassName(getParam(PROTOLOG_CLASS_PARAM, params))
-                protoLogGroupsClassNameArg = validateClassName(getParam(PROTOLOGGROUP_CLASS_PARAM,
-                        params))
-                protoLogImplClassNameArg = validateNotSpecified(PROTOLOGIMPL_CLASS_PARAM, params)
-                protoLogCacheClassNameArg = validateNotSpecified(PROTOLOGCACHE_CLASS_PARAM, params)
+                protoLogGroupsClassNameArg =
+                    validateClassName(getParam(PROTOLOGGROUP_CLASS_PARAM, params))
                 protoLogGroupsJarArg = validateJarName(getParam(PROTOLOGGROUP_JAR_PARAM, params))
-                viewerConfigJsonArg = validateJSONName(getParam(VIEWER_CONFIG_JSON_PARAM, params))
+                viewerConfigFileNameArg =
+                    validateConfigFileName(getParam(VIEWER_CONFIG_PARAM, params))
+                viewerConfigTypeArg = validateConfigType(getParam(VIEWER_CONFIG_TYPE_PARAM, params))
                 outputSourceJarArg = validateNotSpecified(OUTPUT_SOURCE_JAR_PARAM, params)
+                viewerConfigFilePathArg =
+                    validateNotSpecified(VIEWER_CONFIG_FILE_PATH_PARAM, params)
+                legacyViewerConfigFilePathArg =
+                    validateNotSpecified(LEGACY_VIEWER_CONFIG_FILE_PATH_PARAM, params)
+                legacyOutputFilePath = validateNotSpecified(LEGACY_OUTPUT_FILE_PATH, params)
                 javaSourceArgs = validateJavaInputList(inputFiles)
                 logProtofileArg = ""
             }
             READ_LOG_CMD -> {
                 protoLogClassNameArg = validateNotSpecified(PROTOLOG_CLASS_PARAM, params)
                 protoLogGroupsClassNameArg = validateNotSpecified(PROTOLOGGROUP_CLASS_PARAM, params)
-                protoLogImplClassNameArg = validateNotSpecified(PROTOLOGIMPL_CLASS_PARAM, params)
-                protoLogCacheClassNameArg = validateNotSpecified(PROTOLOGCACHE_CLASS_PARAM, params)
                 protoLogGroupsJarArg = validateNotSpecified(PROTOLOGGROUP_JAR_PARAM, params)
-                viewerConfigJsonArg = validateJSONName(getParam(VIEWER_CONFIG_JSON_PARAM, params))
+                viewerConfigFileNameArg =
+                    validateConfigFileName(getParam(VIEWER_CONFIG_PARAM, params))
+                viewerConfigTypeArg = validateNotSpecified(VIEWER_CONFIG_TYPE_PARAM, params)
                 outputSourceJarArg = validateNotSpecified(OUTPUT_SOURCE_JAR_PARAM, params)
+                viewerConfigFilePathArg =
+                    validateNotSpecified(VIEWER_CONFIG_FILE_PATH_PARAM, params)
+                legacyViewerConfigFilePathArg =
+                    validateNotSpecified(LEGACY_VIEWER_CONFIG_FILE_PATH_PARAM, params)
+                legacyOutputFilePath = validateNotSpecified(LEGACY_OUTPUT_FILE_PATH, params)
                 javaSourceArgs = listOf()
                 logProtofileArg = validateLogInputList(inputFiles)
             }
diff --git a/tools/protologtool/src/com/android/protolog/tool/MethodCallVisitor.kt b/tools/protologtool/src/com/android/protolog/tool/MethodCallVisitor.kt
new file mode 100644
index 0000000..fda6351
--- /dev/null
+++ b/tools/protologtool/src/com/android/protolog/tool/MethodCallVisitor.kt
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.protolog.tool
+
+import com.github.javaparser.ast.expr.MethodCallExpr
+
+interface MethodCallVisitor {
+    fun processCall(call: MethodCallExpr)
+}
diff --git a/tools/protologtool/src/com/android/protolog/tool/ProtoLogCallProcessor.kt b/tools/protologtool/src/com/android/protolog/tool/ProtoLogCallProcessor.kt
index 9a76a6f..47724b7 100644
--- a/tools/protologtool/src/com/android/protolog/tool/ProtoLogCallProcessor.kt
+++ b/tools/protologtool/src/com/android/protolog/tool/ProtoLogCallProcessor.kt
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2019 The Android Open Source Project
+ * Copyright (C) 2024 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,115 +16,13 @@
 
 package com.android.protolog.tool
 
-import com.android.internal.protolog.common.LogLevel
 import com.github.javaparser.ast.CompilationUnit
-import com.github.javaparser.ast.Node
-import com.github.javaparser.ast.expr.Expression
-import com.github.javaparser.ast.expr.FieldAccessExpr
-import com.github.javaparser.ast.expr.MethodCallExpr
-import com.github.javaparser.ast.expr.NameExpr
 
-/**
- * Helper class for visiting all ProtoLog calls.
- * For every valid call in the given {@code CompilationUnit} a {@code ProtoLogCallVisitor} callback
- * is executed.
- */
-open class ProtoLogCallProcessor(
-    private val protoLogClassName: String,
-    private val protoLogGroupClassName: String,
-    private val groupMap: Map<String, LogGroup>
-) {
-    private val protoLogSimpleClassName = protoLogClassName.substringAfterLast('.')
-    private val protoLogGroupSimpleClassName = protoLogGroupClassName.substringAfterLast('.')
-
-    private fun getLogGroupName(
-        expr: Expression,
-        isClassImported: Boolean,
-        staticImports: Set<String>,
+interface ProtoLogCallProcessor {
+    fun process(
+        code: CompilationUnit,
+        logCallVisitor: ProtoLogCallVisitor?,
+        otherCallVisitor: MethodCallVisitor?,
         fileName: String
-    ): String {
-        val context = ParsingContext(fileName, expr)
-        return when (expr) {
-            is NameExpr -> when {
-                expr.nameAsString in staticImports -> expr.nameAsString
-                else ->
-                    throw InvalidProtoLogCallException("Unknown/not imported ProtoLogGroup: $expr",
-                            context)
-            }
-            is FieldAccessExpr -> when {
-                expr.scope.toString() == protoLogGroupClassName
-                        || isClassImported &&
-                        expr.scope.toString() == protoLogGroupSimpleClassName -> expr.nameAsString
-                else ->
-                    throw InvalidProtoLogCallException("Unknown/not imported ProtoLogGroup: $expr",
-                            context)
-            }
-            else -> throw InvalidProtoLogCallException("Invalid group argument " +
-                    "- must be ProtoLogGroup enum member reference: $expr", context)
-        }
-    }
-
-    private fun isProtoCall(
-        call: MethodCallExpr,
-        isLogClassImported: Boolean,
-        staticLogImports: Collection<String>
-    ): Boolean {
-        return call.scope.isPresent && call.scope.get().toString() == protoLogClassName ||
-                isLogClassImported && call.scope.isPresent &&
-                call.scope.get().toString() == protoLogSimpleClassName ||
-                !call.scope.isPresent && staticLogImports.contains(call.name.toString())
-    }
-
-    open fun process(code: CompilationUnit, callVisitor: ProtoLogCallVisitor?, fileName: String):
-            CompilationUnit {
-        CodeUtils.checkWildcardStaticImported(code, protoLogClassName, fileName)
-        CodeUtils.checkWildcardStaticImported(code, protoLogGroupClassName, fileName)
-
-        val isLogClassImported = CodeUtils.isClassImportedOrSamePackage(code, protoLogClassName)
-        val staticLogImports = CodeUtils.staticallyImportedMethods(code, protoLogClassName)
-        val isGroupClassImported = CodeUtils.isClassImportedOrSamePackage(code,
-                protoLogGroupClassName)
-        val staticGroupImports = CodeUtils.staticallyImportedMethods(code, protoLogGroupClassName)
-
-        code.findAll(MethodCallExpr::class.java)
-                .filter { call ->
-                    isProtoCall(call, isLogClassImported, staticLogImports)
-                }.forEach { call ->
-                    val context = ParsingContext(fileName, call)
-                    if (call.arguments.size < 2) {
-                        throw InvalidProtoLogCallException("Method signature does not match " +
-                                "any ProtoLog method: $call", context)
-                    }
-
-                    val messageString = CodeUtils.concatMultilineString(call.getArgument(1),
-                            context)
-                    val groupNameArg = call.getArgument(0)
-                    val groupName =
-                            getLogGroupName(groupNameArg, isGroupClassImported,
-                                    staticGroupImports, fileName)
-                    if (groupName !in groupMap) {
-                        throw InvalidProtoLogCallException("Unknown group argument " +
-                                "- not a ProtoLogGroup enum member: $call", context)
-                    }
-
-                    callVisitor?.processCall(call, messageString, getLevelForMethodName(
-                            call.name.toString(), call, context), groupMap.getValue(groupName))
-                }
-        return code
-    }
-
-    companion object {
-        fun getLevelForMethodName(name: String, node: Node, context: ParsingContext): LogLevel {
-            return when (name) {
-                "d" -> LogLevel.DEBUG
-                "v" -> LogLevel.VERBOSE
-                "i" -> LogLevel.INFO
-                "w" -> LogLevel.WARN
-                "e" -> LogLevel.ERROR
-                "wtf" -> LogLevel.WTF
-                else ->
-                    throw InvalidProtoLogCallException("Unknown log level $name in $node", context)
-            }
-        }
-    }
+    ): CompilationUnit
 }
diff --git a/tools/protologtool/src/com/android/protolog/tool/ProtoLogCallProcessorImpl.kt b/tools/protologtool/src/com/android/protolog/tool/ProtoLogCallProcessorImpl.kt
new file mode 100644
index 0000000..1087ae6
--- /dev/null
+++ b/tools/protologtool/src/com/android/protolog/tool/ProtoLogCallProcessorImpl.kt
@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.protolog.tool
+
+import com.android.internal.protolog.common.LogLevel
+import com.github.javaparser.ast.CompilationUnit
+import com.github.javaparser.ast.expr.Expression
+import com.github.javaparser.ast.expr.FieldAccessExpr
+import com.github.javaparser.ast.expr.MethodCallExpr
+import com.github.javaparser.ast.expr.NameExpr
+
+/**
+ * Helper class for visiting all ProtoLog calls.
+ * For every valid call in the given {@code CompilationUnit} a {@code ProtoLogCallVisitor} callback
+ * is executed.
+ */
+class ProtoLogCallProcessorImpl(
+    private val protoLogClassName: String,
+    private val protoLogGroupClassName: String,
+    private val groupMap: Map<String, LogGroup>
+) : ProtoLogCallProcessor {
+    private val protoLogSimpleClassName = protoLogClassName.substringAfterLast('.')
+    private val protoLogGroupSimpleClassName = protoLogGroupClassName.substringAfterLast('.')
+
+    private fun getLogGroupName(
+        expr: Expression,
+        isClassImported: Boolean,
+        staticImports: Set<String>,
+        fileName: String
+    ): String {
+        val context = ParsingContext(fileName, expr)
+        return when (expr) {
+            is NameExpr -> when {
+                expr.nameAsString in staticImports -> expr.nameAsString
+                else ->
+                    throw InvalidProtoLogCallException("Unknown/not imported ProtoLogGroup: $expr",
+                            context)
+            }
+            is FieldAccessExpr -> when {
+                expr.scope.toString() == protoLogGroupClassName || isClassImported &&
+                        expr.scope.toString() == protoLogGroupSimpleClassName -> expr.nameAsString
+                else ->
+                    throw InvalidProtoLogCallException("Unknown/not imported ProtoLogGroup: $expr",
+                            context)
+            }
+            else -> throw InvalidProtoLogCallException("Invalid group argument " +
+                    "- must be ProtoLogGroup enum member reference: $expr", context)
+        }
+    }
+
+    private fun isProtoCall(
+        call: MethodCallExpr,
+        isLogClassImported: Boolean,
+        staticLogImports: Collection<String>
+    ): Boolean {
+        return call.scope.isPresent && call.scope.get().toString() == protoLogClassName ||
+                isLogClassImported && call.scope.isPresent &&
+                call.scope.get().toString() == protoLogSimpleClassName ||
+                !call.scope.isPresent && staticLogImports.contains(call.name.toString())
+    }
+
+    fun process(code: CompilationUnit, logCallVisitor: ProtoLogCallVisitor?, fileName: String):
+            CompilationUnit {
+        return process(code, logCallVisitor, null, fileName)
+    }
+
+    override fun process(
+        code: CompilationUnit,
+        logCallVisitor: ProtoLogCallVisitor?,
+        otherCallVisitor: MethodCallVisitor?,
+        fileName: String
+    ): CompilationUnit {
+        CodeUtils.checkWildcardStaticImported(code, protoLogClassName, fileName)
+        CodeUtils.checkWildcardStaticImported(code, protoLogGroupClassName, fileName)
+
+        val isLogClassImported = CodeUtils.isClassImportedOrSamePackage(code, protoLogClassName)
+        val staticLogImports = CodeUtils.staticallyImportedMethods(code, protoLogClassName)
+        val isGroupClassImported = CodeUtils.isClassImportedOrSamePackage(code,
+                protoLogGroupClassName)
+        val staticGroupImports = CodeUtils.staticallyImportedMethods(code, protoLogGroupClassName)
+
+        code.findAll(MethodCallExpr::class.java)
+                .filter { call ->
+                    isProtoCall(call, isLogClassImported, staticLogImports)
+                }.forEach { call ->
+                    val context = ParsingContext(fileName, call)
+
+                    val logMethods = LogLevel.entries.map { it.shortCode }
+                    if (logMethods.contains(call.name.id)) {
+                        // Process a log call
+                        if (call.arguments.size < 2) {
+                            throw InvalidProtoLogCallException("Method signature does not match " +
+                                    "any ProtoLog method: $call", context)
+                        }
+
+                        val messageString = CodeUtils.concatMultilineString(call.getArgument(1),
+                            context)
+                        val groupNameArg = call.getArgument(0)
+                        val groupName =
+                            getLogGroupName(groupNameArg, isGroupClassImported,
+                                staticGroupImports, fileName)
+                        if (groupName !in groupMap) {
+                            throw InvalidProtoLogCallException("Unknown group argument " +
+                                    "- not a ProtoLogGroup enum member: $call", context)
+                        }
+
+                        logCallVisitor?.processCall(call, messageString, getLevelForMethodName(
+                            call.name.toString(), call, context), groupMap.getValue(groupName))
+                    } else {
+                        // Process non-log message calls
+                        otherCallVisitor?.processCall(call)
+                    }
+                }
+        return code
+    }
+
+    private fun getLevelForMethodName(
+        name: String,
+        node: MethodCallExpr,
+        context: ParsingContext
+    ): LogLevel = when (name) {
+            "d" -> LogLevel.DEBUG
+            "v" -> LogLevel.VERBOSE
+            "i" -> LogLevel.INFO
+            "w" -> LogLevel.WARN
+            "e" -> LogLevel.ERROR
+            "wtf" -> LogLevel.WTF
+            else ->
+                throw InvalidProtoLogCallException("Unknown log level $name in $node", context)
+        }
+}
diff --git a/tools/protologtool/src/com/android/protolog/tool/ProtoLogTool.kt b/tools/protologtool/src/com/android/protolog/tool/ProtoLogTool.kt
index ce856cd..1381847 100644
--- a/tools/protologtool/src/com/android/protolog/tool/ProtoLogTool.kt
+++ b/tools/protologtool/src/com/android/protolog/tool/ProtoLogTool.kt
@@ -16,13 +16,22 @@
 
 package com.android.protolog.tool
 
+import com.android.internal.protolog.common.LogLevel
+import com.android.internal.protolog.common.ProtoLog
+import com.android.internal.protolog.common.ProtoLogToolInjected
 import com.android.protolog.tool.CommandOptions.Companion.USAGE
 import com.github.javaparser.ParseProblemException
 import com.github.javaparser.ParserConfiguration
 import com.github.javaparser.StaticJavaParser
 import com.github.javaparser.ast.CompilationUnit
+import com.github.javaparser.ast.body.ClassOrInterfaceDeclaration
+import com.github.javaparser.ast.expr.MethodCallExpr
+import com.github.javaparser.ast.expr.NullLiteralExpr
+import com.github.javaparser.ast.expr.SimpleName
+import com.github.javaparser.ast.expr.StringLiteralExpr
 import java.io.File
 import java.io.FileInputStream
+import java.io.FileNotFoundException
 import java.io.FileOutputStream
 import java.io.OutputStream
 import java.time.LocalDateTime
@@ -30,9 +39,21 @@
 import java.util.concurrent.Executors
 import java.util.jar.JarOutputStream
 import java.util.zip.ZipEntry
+import kotlin.math.abs
+import kotlin.random.Random
 import kotlin.system.exitProcess
 
 object ProtoLogTool {
+    const val PROTOLOG_IMPL_SRC_PATH =
+        "frameworks/base/core/java/com/android/internal/protolog/ProtoLogImpl.java"
+
+    data class LogCall(
+        val messageString: String,
+        val logLevel: LogLevel,
+        val logGroup: LogGroup,
+        val position: String
+    )
+
     private fun showHelpAndExit() {
         println(USAGE)
         exitProcess(-1)
@@ -51,26 +72,40 @@
     }
 
     private fun processClasses(command: CommandOptions) {
+        val generationHash = abs(Random.nextInt())
+        // Need to generate a new impl class to inject static constants into the class.
+        val generatedProtoLogImplClass =
+            "com.android.internal.protolog.ProtoLogImpl_$generationHash"
+
         val groups = injector.readLogGroups(
                 command.protoLogGroupsJarArg,
                 command.protoLogGroupsClassNameArg)
         val out = injector.fileOutputStream(command.outputSourceJarArg)
         val outJar = JarOutputStream(out)
-        val processor = ProtoLogCallProcessor(command.protoLogClassNameArg,
-                command.protoLogGroupsClassNameArg, groups)
+        val processor = ProtoLogCallProcessorImpl(
+            command.protoLogClassNameArg,
+            command.protoLogGroupsClassNameArg,
+            groups)
+
+        val protologImplName = generatedProtoLogImplClass.split(".").last()
+        val protologImplPath = "gen/${generatedProtoLogImplClass.split(".")
+                .joinToString("/")}.java"
+        outJar.putNextEntry(zipEntry(protologImplPath))
+
+        outJar.write(generateProtoLogImpl(protologImplName, command.viewerConfigFilePathArg,
+            command.legacyViewerConfigFilePathArg, command.legacyOutputFilePath).toByteArray())
 
         val executor = newThreadPool()
 
         try {
             command.javaSourceArgs.map { path ->
                 executor.submitCallable {
-                    val transformer = SourceTransformer(command.protoLogImplClassNameArg,
-                            command.protoLogCacheClassNameArg, processor)
+                    val transformer = SourceTransformer(generatedProtoLogImplClass, processor)
                     val file = File(path)
                     val text = injector.readText(file)
                     val outSrc = try {
                         val code = tryParse(text, path)
-                        if (containsProtoLogText(text, command.protoLogClassNameArg)) {
+                        if (containsProtoLogText(text, ProtoLog::class.java.simpleName)) {
                             transformer.processClass(text, path, packagePath(file, code), code)
                         } else {
                             text
@@ -93,51 +128,77 @@
             executor.shutdown()
         }
 
-        val cacheSplit = command.protoLogCacheClassNameArg.split(".")
-        val cacheName = cacheSplit.last()
-        val cachePackage = cacheSplit.dropLast(1).joinToString(".")
-        val cachePath = "gen/${cacheSplit.joinToString("/")}.java"
-
-        outJar.putNextEntry(zipEntry(cachePath))
-        outJar.write(generateLogGroupCache(cachePackage, cacheName, groups,
-                command.protoLogImplClassNameArg, command.protoLogGroupsClassNameArg).toByteArray())
-
         outJar.close()
         out.close()
     }
 
-    fun generateLogGroupCache(
-        cachePackage: String,
-        cacheName: String,
-        groups: Map<String, LogGroup>,
-        protoLogImplClassName: String,
-        protoLogGroupsClassName: String
+    private fun generateProtoLogImpl(
+        protoLogImplGenName: String,
+        viewerConfigFilePath: String,
+        legacyViewerConfigFilePath: String?,
+        legacyOutputFilePath: String?,
     ): String {
-        val fields = groups.values.map {
-            "public static boolean ${it.name}_enabled = false;"
-        }.joinToString("\n")
+        val file = File(PROTOLOG_IMPL_SRC_PATH)
 
-        val updates = groups.values.map {
-            "${it.name}_enabled = " +
-                    "$protoLogImplClassName.isEnabled($protoLogGroupsClassName.${it.name});"
-        }.joinToString("\n")
+        val text = try {
+            injector.readText(file)
+        } catch (e: FileNotFoundException) {
+            throw RuntimeException("Expected to find '$PROTOLOG_IMPL_SRC_PATH' but file was not " +
+                    "included in source for the ProtoLog Tool to process.")
+        }
 
-        return """
-            package $cachePackage;
+        val code = tryParse(text, PROTOLOG_IMPL_SRC_PATH)
 
-            public class $cacheName {
-${fields.replaceIndent("                ")}
+        val classDeclarations = code.findAll(ClassOrInterfaceDeclaration::class.java)
+        require(classDeclarations.size == 1) { "Expected exactly one class declaration" }
+        val classDeclaration = classDeclarations[0]
 
-                static {
-                    $protoLogImplClassName.sCacheUpdater = $cacheName::update;
-                    update();
-                }
+        val classNameNode = classDeclaration.findFirst(SimpleName::class.java).get()
+        classNameNode.setId(protoLogImplGenName)
 
-                static void update() {
-${updates.replaceIndent("                    ")}
-                }
-            }
-        """.trimIndent()
+        injectConstants(classDeclaration,
+            viewerConfigFilePath, legacyViewerConfigFilePath, legacyOutputFilePath)
+
+        return code.toString()
+    }
+
+    private fun injectConstants(
+        classDeclaration: ClassOrInterfaceDeclaration,
+        viewerConfigFilePath: String,
+        legacyViewerConfigFilePath: String?,
+        legacyOutputFilePath: String?
+    ) {
+        classDeclaration.fields.forEach { field ->
+            field.getAnnotationByClass(ProtoLogToolInjected::class.java)
+                    .ifPresent { annotationExpr ->
+                        if (annotationExpr.isSingleMemberAnnotationExpr) {
+                            val valueName = annotationExpr.asSingleMemberAnnotationExpr()
+                                    .memberValue.asNameExpr().name.asString()
+                            when (valueName) {
+                                ProtoLogToolInjected.Value.VIEWER_CONFIG_PATH.name -> {
+                                    field.setFinal(true)
+                                    field.variables.first()
+                                            .setInitializer(StringLiteralExpr(viewerConfigFilePath))
+                                }
+                                ProtoLogToolInjected.Value.LEGACY_OUTPUT_FILE_PATH.name -> {
+                                    field.setFinal(true)
+                                    field.variables.first()
+                                            .setInitializer(legacyOutputFilePath?.let {
+                                                StringLiteralExpr(it)
+                                            } ?: NullLiteralExpr())
+                                }
+                                ProtoLogToolInjected.Value.LEGACY_VIEWER_CONFIG_PATH.name -> {
+                                    field.setFinal(true)
+                                    field.variables.first()
+                                            .setInitializer(legacyViewerConfigFilePath?.let {
+                                                StringLiteralExpr(it)
+                                            } ?: NullLiteralExpr())
+                                }
+                                else -> error("Unhandled ProtoLogToolInjected value: $valueName.")
+                            }
+                        }
+                    }
+        }
     }
 
     private fun tryParse(code: String, fileName: String): CompilationUnit {
@@ -145,24 +206,53 @@
             return StaticJavaParser.parse(code)
         } catch (ex: ParseProblemException) {
             val problem = ex.problems.first()
-            throw ParsingException("Java parsing erro" +
-                    "r: ${problem.verboseMessage}",
+            throw ParsingException("Java parsing error: ${problem.verboseMessage}",
                     ParsingContext(fileName, problem.location.orElse(null)
                             ?.begin?.range?.orElse(null)?.begin?.line
                             ?: 0))
         }
     }
 
+    class LogCallRegistry {
+        private val statements = mutableMapOf<LogCall, Long>()
+
+        fun addLogCalls(calls: List<LogCall>) {
+            calls.forEach { logCall ->
+                if (logCall.logGroup.enabled) {
+                    statements.putIfAbsent(logCall,
+                        CodeUtils.hash(logCall.position, logCall.messageString,
+                            logCall.logLevel, logCall.logGroup))
+                }
+            }
+        }
+
+        fun getStatements(): Map<LogCall, Long> {
+            return statements
+        }
+    }
+
+    interface ProtologViewerConfigBuilder {
+        fun build(statements: Map<LogCall, Long>): ByteArray
+    }
+
     private fun viewerConf(command: CommandOptions) {
         val groups = injector.readLogGroups(
                 command.protoLogGroupsJarArg,
                 command.protoLogGroupsClassNameArg)
-        val processor = ProtoLogCallProcessor(command.protoLogClassNameArg,
+        val processor = ProtoLogCallProcessorImpl(command.protoLogClassNameArg,
                 command.protoLogGroupsClassNameArg, groups)
-        val builder = ViewerConfigBuilder(processor)
+        val outputType = command.viewerConfigTypeArg
+
+        val configBuilder: ProtologViewerConfigBuilder = when (outputType.lowercase()) {
+            "json" -> ViewerConfigJsonBuilder()
+            "proto" -> ViewerConfigProtoBuilder()
+            else -> error("Invalid output type provide. Provided '$outputType'.")
+        }
 
         val executor = newThreadPool()
 
+        val logCallRegistry = LogCallRegistry()
+
         try {
             command.javaSourceArgs.map { path ->
                 executor.submitCallable {
@@ -171,7 +261,7 @@
                     if (containsProtoLogText(text, command.protoLogClassNameArg)) {
                         try {
                             val code = tryParse(text, path)
-                            builder.findLogCalls(code, path, packagePath(file, code))
+                            findLogCalls(code, path, packagePath(file, code), processor)
                         } catch (ex: ParsingException) {
                             // If we cannot parse this file, skip it (and log why). Compilation will
                             // fail in a subsequent build step.
@@ -183,15 +273,38 @@
                     }
                 }
             }.forEach { future ->
-                builder.addLogCalls(future.get() ?: return@forEach)
+                logCallRegistry.addLogCalls(future.get() ?: return@forEach)
             }
         } finally {
             executor.shutdown()
         }
 
-        val out = injector.fileOutputStream(command.viewerConfigJsonArg)
-        out.write(builder.build().toByteArray())
-        out.close()
+        val outFile = injector.fileOutputStream(command.viewerConfigFileNameArg)
+        outFile.write(configBuilder.build(logCallRegistry.getStatements()))
+        outFile.close()
+    }
+
+    private fun findLogCalls(
+        unit: CompilationUnit,
+        path: String,
+        packagePath: String,
+        processor: ProtoLogCallProcessorImpl
+    ): List<LogCall> {
+        val calls = mutableListOf<LogCall>()
+        val logCallVisitor = object : ProtoLogCallVisitor {
+            override fun processCall(
+                call: MethodCallExpr,
+                messageString: String,
+                level: LogLevel,
+                group: LogGroup
+            ) {
+                val logCall = LogCall(messageString, level, group, packagePath)
+                calls.add(logCall)
+            }
+        }
+        processor.process(unit, logCallVisitor, path)
+
+        return calls
     }
 
     private fun packagePath(file: File, code: CompilationUnit): String {
@@ -204,7 +317,7 @@
     private fun read(command: CommandOptions) {
         LogParser(ViewerConfigParser())
                 .parse(FileInputStream(command.logProtofileArg),
-                        FileInputStream(command.viewerConfigJsonArg), System.out)
+                        FileInputStream(command.viewerConfigFileNameArg), System.out)
     }
 
     @JvmStatic
diff --git a/tools/protologtool/src/com/android/protolog/tool/SourceTransformer.kt b/tools/protologtool/src/com/android/protolog/tool/SourceTransformer.kt
index b50f357..2b71641 100644
--- a/tools/protologtool/src/com/android/protolog/tool/SourceTransformer.kt
+++ b/tools/protologtool/src/com/android/protolog/tool/SourceTransformer.kt
@@ -22,11 +22,11 @@
 import com.github.javaparser.ast.CompilationUnit
 import com.github.javaparser.ast.NodeList
 import com.github.javaparser.ast.body.VariableDeclarator
-import com.github.javaparser.ast.expr.BooleanLiteralExpr
 import com.github.javaparser.ast.expr.CastExpr
 import com.github.javaparser.ast.expr.Expression
 import com.github.javaparser.ast.expr.FieldAccessExpr
 import com.github.javaparser.ast.expr.IntegerLiteralExpr
+import com.github.javaparser.ast.expr.LongLiteralExpr
 import com.github.javaparser.ast.expr.MethodCallExpr
 import com.github.javaparser.ast.expr.NameExpr
 import com.github.javaparser.ast.expr.NullLiteralExpr
@@ -35,7 +35,6 @@
 import com.github.javaparser.ast.expr.VariableDeclarationExpr
 import com.github.javaparser.ast.stmt.BlockStmt
 import com.github.javaparser.ast.stmt.ExpressionStmt
-import com.github.javaparser.ast.stmt.IfStmt
 import com.github.javaparser.ast.type.ArrayType
 import com.github.javaparser.ast.type.ClassOrInterfaceType
 import com.github.javaparser.ast.type.PrimitiveType
@@ -45,15 +44,59 @@
 
 class SourceTransformer(
     protoLogImplClassName: String,
-    protoLogCacheClassName: String,
     private val protoLogCallProcessor: ProtoLogCallProcessor
-) : ProtoLogCallVisitor {
-    override fun processCall(
-        call: MethodCallExpr,
-        messageString: String,
-        level: LogLevel,
-        group: LogGroup
-    ) {
+) {
+    private val inlinePrinter: PrettyPrinter
+    private val objectType = StaticJavaParser.parseClassOrInterfaceType("Object")
+
+    init {
+        val config = PrettyPrinterConfiguration()
+        config.endOfLineCharacter = " "
+        config.indentSize = 0
+        config.tabWidth = 1
+        inlinePrinter = PrettyPrinter(config)
+    }
+
+    fun processClass(
+        code: String,
+        path: String,
+        packagePath: String,
+        compilationUnit: CompilationUnit =
+            StaticJavaParser.parse(code)
+    ): String {
+        this.path = path
+        this.packagePath = packagePath
+        processedCode = code.split('\n').toMutableList()
+        offsets = IntArray(processedCode.size)
+        protoLogCallProcessor.process(compilationUnit, protoLogCallVisitor, otherCallVisitor, path)
+        return processedCode.joinToString("\n")
+    }
+
+    private val protoLogImplClassNode =
+            StaticJavaParser.parseExpression<FieldAccessExpr>(protoLogImplClassName)
+    private var processedCode: MutableList<String> = mutableListOf()
+    private var offsets: IntArray = IntArray(0)
+    /** The path of the file being processed, relative to $ANDROID_BUILD_TOP */
+    private var path: String = ""
+    /** The path of the file being processed, relative to the root package */
+    private var packagePath: String = ""
+
+    private val protoLogCallVisitor = object : ProtoLogCallVisitor {
+        override fun processCall(
+            call: MethodCallExpr,
+            messageString: String,
+            level: LogLevel,
+            group: LogGroup
+        ) {
+            validateCall(call)
+            val processedCallStatement =
+                createProcessedCallStatement(call, group, level, messageString)
+            val parentStmt = call.parentNode.get() as ExpressionStmt
+            injectProcessedCallStatementInCode(processedCallStatement, parentStmt)
+        }
+    }
+
+    private fun validateCall(call: MethodCallExpr) {
         // Input format: ProtoLog.e(GROUP, "msg %d", arg)
         if (!call.parentNode.isPresent) {
             // Should never happen
@@ -71,89 +114,79 @@
             throw RuntimeException("Unable to process log call $call " +
                     "- no grandparent node in AST")
         }
-        val ifStmt: IfStmt
-        if (group.enabled) {
-            val hash = CodeUtils.hash(packagePath, messageString, level, group)
-            val newCall = call.clone()
-            if (!group.textEnabled) {
-                // Remove message string if text logging is not enabled by default.
-                // Out: ProtoLog.e(GROUP, null, arg)
-                newCall.arguments[1].replace(NameExpr("null"))
-            }
-            // Insert message string hash as a second argument.
-            // Out: ProtoLog.e(GROUP, 1234, null, arg)
-            newCall.arguments.add(1, IntegerLiteralExpr(hash))
-            val argTypes = LogDataType.parseFormatString(messageString)
-            val typeMask = LogDataType.logDataTypesToBitMask(argTypes)
-            // Insert bitmap representing which Number parameters are to be considered as
-            // floating point numbers.
-            // Out: ProtoLog.e(GROUP, 1234, 0, null, arg)
-            newCall.arguments.add(2, IntegerLiteralExpr(typeMask))
-            // Replace call to a stub method with an actual implementation.
-            // Out: ProtoLogImpl.e(GROUP, 1234, null, arg)
-            newCall.setScope(protoLogImplClassNode)
-            // Create a call to ProtoLog$Cache.GROUP_enabled
-            // Out: com.android.server.protolog.ProtoLog$Cache.GROUP_enabled
-            val isLogEnabled = FieldAccessExpr(protoLogCacheClassNode, "${group.name}_enabled")
-            if (argTypes.size != call.arguments.size - 2) {
-                throw InvalidProtoLogCallException(
-                        "Number of arguments (${argTypes.size} does not mach format" +
-                                " string in: $call", ParsingContext(path, call))
-            }
-            val blockStmt = BlockStmt()
-            if (argTypes.isNotEmpty()) {
-                // Assign every argument to a variable to check its type in compile time
-                // (this is assignment is optimized-out by dex tool, there is no runtime impact)/
-                // Out: long protoLogParam0 = arg
-                argTypes.forEachIndexed { idx, type ->
-                    val varName = "protoLogParam$idx"
-                    val declaration = VariableDeclarator(getASTTypeForDataType(type), varName,
-                            getConversionForType(type)(newCall.arguments[idx + 4].clone()))
-                    blockStmt.addStatement(ExpressionStmt(VariableDeclarationExpr(declaration)))
-                    newCall.setArgument(idx + 4, NameExpr(SimpleName(varName)))
-                }
-            } else {
-                // Assign (Object[])null as the vararg parameter to prevent allocating an empty
-                // object array.
-                val nullArray = CastExpr(ArrayType(objectType), NullLiteralExpr())
-                newCall.addArgument(nullArray)
-            }
-            blockStmt.addStatement(ExpressionStmt(newCall))
-            // Create an IF-statement with the previously created condition.
-            // Out: if (ProtoLogImpl.isEnabled(GROUP)) {
-            //          long protoLogParam0 = arg;
-            //          ProtoLogImpl.e(GROUP, 1234, 0, null, protoLogParam0);
-            //      }
-            ifStmt = IfStmt(isLogEnabled, blockStmt, null)
-        } else {
-            // Surround with if (false).
-            val newCall = parentStmt.clone()
-            ifStmt = IfStmt(BooleanLiteralExpr(false), BlockStmt(NodeList(newCall)), null)
-            newCall.setBlockComment(" ${group.name} is disabled ")
+    }
+
+    private fun createProcessedCallStatement(
+        call: MethodCallExpr,
+        group: LogGroup,
+        level: LogLevel,
+        messageString: String
+    ): BlockStmt {
+        val hash = CodeUtils.hash(packagePath, messageString, level, group)
+        val newCall = call.clone()
+        if (!group.textEnabled) {
+            // Remove message string if text logging is not enabled by default.
+            // Out: ProtoLog.e(GROUP, null, arg)
+            newCall.arguments[1].replace(NameExpr("null"))
         }
+        // Insert message string hash as a second argument.
+        // Out: ProtoLog.e(GROUP, 1234, null, arg)
+        newCall.arguments.add(1, LongLiteralExpr("" + hash + "L"))
+        val argTypes = LogDataType.parseFormatString(messageString)
+        val typeMask = LogDataType.logDataTypesToBitMask(argTypes)
+        // Insert bitmap representing which Number parameters are to be considered as
+        // floating point numbers.
+        // Out: ProtoLog.e(GROUP, 1234, 0, null, arg)
+        newCall.arguments.add(2, IntegerLiteralExpr(typeMask))
+        // Replace call to a stub method with an actual implementation.
+        // Out: ProtoLogImpl.e(GROUP, 1234, null, arg)
+        newCall.setScope(protoLogImplClassNode)
+        if (argTypes.size != call.arguments.size - 2) {
+            throw InvalidProtoLogCallException(
+                "Number of arguments (${argTypes.size} does not match format" +
+                        " string in: $call", ParsingContext(path, call))
+        }
+        val blockStmt = BlockStmt()
+        if (argTypes.isNotEmpty()) {
+            // Assign every argument to a variable to check its type in compile time
+            // (this is assignment is optimized-out by dex tool, there is no runtime impact)/
+            // Out: long protoLogParam0 = arg
+            argTypes.forEachIndexed { idx, type ->
+                val varName = "protoLogParam$idx"
+                val declaration = VariableDeclarator(getASTTypeForDataType(type), varName,
+                    getConversionForType(type)(newCall.arguments[idx + 4].clone()))
+                blockStmt.addStatement(ExpressionStmt(VariableDeclarationExpr(declaration)))
+                newCall.setArgument(idx + 4, NameExpr(SimpleName(varName)))
+            }
+        } else {
+            // Assign (Object[])null as the vararg parameter to prevent allocating an empty
+            // object array.
+            val nullArray = CastExpr(ArrayType(objectType), NullLiteralExpr())
+            newCall.addArgument(nullArray)
+        }
+        blockStmt.addStatement(ExpressionStmt(newCall))
+
+        return blockStmt
+    }
+
+    private fun injectProcessedCallStatementInCode(
+        processedCallStatement: BlockStmt,
+        parentStmt: ExpressionStmt
+    ) {
         // Inline the new statement.
-        val printedIfStmt = inlinePrinter.print(ifStmt)
+        val printedBlockStmt = inlinePrinter.print(processedCallStatement)
         // Append blank lines to preserve line numbering in file (to allow debugging)
         val parentRange = parentStmt.range.get()
         val newLines = parentRange.end.line - parentRange.begin.line
-        val newStmt = printedIfStmt.substringBeforeLast('}') + ("\n".repeat(newLines)) + '}'
+        val newStmt = printedBlockStmt.substringBeforeLast('}') + ("\n".repeat(newLines)) + '}'
         // pre-workaround code, see explanation below
-        /*
-        val inlinedIfStmt = StaticJavaParser.parseStatement(newStmt)
-        LexicalPreservingPrinter.setup(inlinedIfStmt)
-        // Replace the original call.
-        if (!parentStmt.replace(inlinedIfStmt)) {
-            // Should never happen
-            throw RuntimeException("Unable to process log call $call " +
-                    "- unable to replace the call.")
-        }
-        */
+
         /** Workaround for a bug in JavaParser (AST tree invalid after replacing a node when using
          * LexicalPreservingPrinter (https://github.com/javaparser/javaparser/issues/2290).
          * Replace the code below with the one commended-out above one the issue is resolved. */
         if (!parentStmt.range.isPresent) {
             // Should never happen
-            throw RuntimeException("Unable to process log call $call " +
+            throw RuntimeException("Unable to process log call in $parentStmt " +
                     "- unable to replace the call.")
         }
         val range = parentStmt.range.get()
@@ -161,29 +194,38 @@
         val oldLines = processedCode.subList(begin, range.end.line)
         val oldCode = oldLines.joinToString("\n")
         val newCode = oldCode.replaceRange(
-                offsets[begin] + range.begin.column - 1,
-                oldCode.length - oldLines.lastOrNull()!!.length +
-                        range.end.column + offsets[range.end.line - 1], newStmt)
+            offsets[begin] + range.begin.column - 1,
+            oldCode.length - oldLines.lastOrNull()!!.length +
+                    range.end.column + offsets[range.end.line - 1], newStmt)
         newCode.split("\n").forEachIndexed { idx, line ->
             offsets[begin + idx] += line.length - processedCode[begin + idx].length
             processedCode[begin + idx] = line
         }
     }
 
-    private val inlinePrinter: PrettyPrinter
-    private val objectType = StaticJavaParser.parseClassOrInterfaceType("Object")
+    private val otherCallVisitor = object : MethodCallVisitor {
+        override fun processCall(call: MethodCallExpr) {
+            val newCall = call.clone()
+            newCall.setScope(protoLogImplClassNode)
 
-    init {
-        val config = PrettyPrinterConfiguration()
-        config.endOfLineCharacter = " "
-        config.indentSize = 0
-        config.tabWidth = 1
-        inlinePrinter = PrettyPrinter(config)
+            val range = call.range.get()
+            val begin = range.begin.line - 1
+            val oldLines = processedCode.subList(begin, range.end.line)
+            val oldCode = oldLines.joinToString("\n")
+            val newCode = oldCode.replaceRange(
+                offsets[begin] + range.begin.column - 1,
+                oldCode.length - oldLines.lastOrNull()!!.length +
+                        range.end.column + offsets[range.end.line - 1], newCall.toString())
+            newCode.split("\n").forEachIndexed { idx, line ->
+                offsets[begin + idx] += line.length - processedCode[begin + idx].length
+                processedCode[begin + idx] = line
+            }
+        }
     }
 
     companion object {
         private val stringType: ClassOrInterfaceType =
-                StaticJavaParser.parseClassOrInterfaceType("String")
+            StaticJavaParser.parseClassOrInterfaceType("String")
 
         fun getASTTypeForDataType(type: Int): Type {
             return when (type) {
@@ -202,36 +244,10 @@
             return when (type) {
                 LogDataType.STRING -> { expr ->
                     MethodCallExpr(TypeExpr(StaticJavaParser.parseClassOrInterfaceType("String")),
-                            SimpleName("valueOf"), NodeList(expr))
+                        SimpleName("valueOf"), NodeList(expr))
                 }
                 else -> { expr -> expr }
             }
         }
     }
-
-    private val protoLogImplClassNode =
-            StaticJavaParser.parseExpression<FieldAccessExpr>(protoLogImplClassName)
-    private val protoLogCacheClassNode =
-            StaticJavaParser.parseExpression<FieldAccessExpr>(protoLogCacheClassName)
-    private var processedCode: MutableList<String> = mutableListOf()
-    private var offsets: IntArray = IntArray(0)
-    /** The path of the file being processed, relative to $ANDROID_BUILD_TOP */
-    private var path: String = ""
-    /** The path of the file being processed, relative to the root package */
-    private var packagePath: String = ""
-
-    fun processClass(
-        code: String,
-        path: String,
-        packagePath: String,
-        compilationUnit: CompilationUnit =
-               StaticJavaParser.parse(code)
-    ): String {
-        this.path = path
-        this.packagePath = packagePath
-        processedCode = code.split('\n').toMutableList()
-        offsets = IntArray(processedCode.size)
-        protoLogCallProcessor.process(compilationUnit, this, path)
-        return processedCode.joinToString("\n")
-    }
 }
diff --git a/tools/protologtool/src/com/android/protolog/tool/ViewerConfigBuilder.kt b/tools/protologtool/src/com/android/protolog/tool/ViewerConfigBuilder.kt
deleted file mode 100644
index 0d5d022..0000000
--- a/tools/protologtool/src/com/android/protolog/tool/ViewerConfigBuilder.kt
+++ /dev/null
@@ -1,125 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.protolog.tool
-
-import com.android.internal.protolog.common.LogLevel
-import com.android.json.stream.JsonWriter
-import com.github.javaparser.ast.CompilationUnit
-import com.android.protolog.tool.Constants.VERSION
-import com.github.javaparser.ast.expr.MethodCallExpr
-import java.io.StringWriter
-
-class ViewerConfigBuilder(
-    private val processor: ProtoLogCallProcessor
-) {
-    private fun addLogCall(logCall: LogCall, context: ParsingContext) {
-        val group = logCall.logGroup
-        val messageString = logCall.messageString
-        if (group.enabled) {
-            val key = logCall.key()
-            if (statements.containsKey(key)) {
-                if (statements[key] != logCall) {
-                    throw HashCollisionException(
-                            "Please modify the log message \"$messageString\" " +
-                                    "or \"${statements[key]}\" - their hashes are equal.", context)
-                }
-            } else {
-                groups.add(group)
-                statements[key] = logCall
-            }
-        }
-    }
-
-    private val statements: MutableMap<Int, LogCall> = mutableMapOf()
-    private val groups: MutableSet<LogGroup> = mutableSetOf()
-
-    fun findLogCalls(
-        unit: CompilationUnit,
-        path: String,
-        packagePath: String
-    ): List<Pair<LogCall, ParsingContext>> {
-        val calls = mutableListOf<Pair<LogCall, ParsingContext>>()
-        val visitor = object : ProtoLogCallVisitor {
-            override fun processCall(
-                call: MethodCallExpr,
-                messageString: String,
-                level: LogLevel,
-                group: LogGroup
-            ) {
-                val logCall = LogCall(messageString, level, group, packagePath)
-                val context = ParsingContext(path, call)
-                calls.add(logCall to context)
-            }
-        }
-        processor.process(unit, visitor, path)
-
-        return calls
-    }
-
-    fun addLogCalls(calls: List<Pair<LogCall, ParsingContext>>) {
-        calls.forEach { (logCall, context) ->
-            addLogCall(logCall, context)
-        }
-    }
-
-    fun build(): String {
-        val stringWriter = StringWriter()
-        val writer = JsonWriter(stringWriter)
-        writer.setIndent("  ")
-        writer.beginObject()
-        writer.name("version")
-        writer.value(VERSION)
-        writer.name("messages")
-        writer.beginObject()
-        statements.toSortedMap().forEach { (key, value) ->
-            writer.name(key.toString())
-            writer.beginObject()
-            writer.name("message")
-            writer.value(value.messageString)
-            writer.name("level")
-            writer.value(value.logLevel.name)
-            writer.name("group")
-            writer.value(value.logGroup.name)
-            writer.name("at")
-            writer.value(value.position)
-            writer.endObject()
-        }
-        writer.endObject()
-        writer.name("groups")
-        writer.beginObject()
-        groups.toSortedSet(Comparator { o1, o2 -> o1.name.compareTo(o2.name) }).forEach { group ->
-            writer.name(group.name)
-            writer.beginObject()
-            writer.name("tag")
-            writer.value(group.tag)
-            writer.endObject()
-        }
-        writer.endObject()
-        writer.endObject()
-        stringWriter.buffer.append('\n')
-        return stringWriter.toString()
-    }
-
-    data class LogCall(
-        val messageString: String,
-        val logLevel: LogLevel,
-        val logGroup: LogGroup,
-        val position: String
-    ) {
-        fun key() = CodeUtils.hash(position, messageString, logLevel, logGroup)
-    }
-}
diff --git a/tools/protologtool/src/com/android/protolog/tool/ViewerConfigJsonBuilder.kt b/tools/protologtool/src/com/android/protolog/tool/ViewerConfigJsonBuilder.kt
new file mode 100644
index 0000000..7714db2
--- /dev/null
+++ b/tools/protologtool/src/com/android/protolog/tool/ViewerConfigJsonBuilder.kt
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.protolog.tool
+
+import com.android.json.stream.JsonWriter
+import com.android.protolog.tool.Constants.VERSION
+import java.io.StringWriter
+
+class ViewerConfigJsonBuilder : ProtoLogTool.ProtologViewerConfigBuilder {
+    override fun build(statements: Map<ProtoLogTool.LogCall, Long>): ByteArray {
+        val groups = statements.map { it.key.logGroup }.toSet()
+        val stringWriter = StringWriter()
+        val writer = JsonWriter(stringWriter)
+        writer.setIndent("  ")
+        writer.beginObject()
+        writer.name("version")
+        writer.value(VERSION)
+        writer.name("messages")
+        writer.beginObject()
+        statements.forEach { (log, key) ->
+            writer.name(key.toString())
+            writer.beginObject()
+            writer.name("message")
+            writer.value(log.messageString)
+            writer.name("level")
+            writer.value(log.logLevel.name)
+            writer.name("group")
+            writer.value(log.logGroup.name)
+            writer.name("at")
+            writer.value(log.position)
+            writer.endObject()
+        }
+        writer.endObject()
+        writer.name("groups")
+        writer.beginObject()
+        groups.toSortedSet { o1, o2 -> o1.name.compareTo(o2.name) }.forEach { group ->
+            writer.name(group.name)
+            writer.beginObject()
+            writer.name("tag")
+            writer.value(group.tag)
+            writer.endObject()
+        }
+        writer.endObject()
+        writer.endObject()
+        stringWriter.buffer.append('\n')
+        return stringWriter.toString().toByteArray()
+    }
+}
diff --git a/tools/protologtool/src/com/android/protolog/tool/ViewerConfigParser.kt b/tools/protologtool/src/com/android/protolog/tool/ViewerConfigParser.kt
index 7278db0..58be3a3 100644
--- a/tools/protologtool/src/com/android/protolog/tool/ViewerConfigParser.kt
+++ b/tools/protologtool/src/com/android/protolog/tool/ViewerConfigParser.kt
@@ -63,12 +63,12 @@
         return GroupEntry(tag)
     }
 
-    fun parseMessages(jsonReader: JsonReader): Map<Int, MessageEntry> {
-        val config: MutableMap<Int, MessageEntry> = mutableMapOf()
+    fun parseMessages(jsonReader: JsonReader): Map<Long, MessageEntry> {
+        val config: MutableMap<Long, MessageEntry> = mutableMapOf()
         jsonReader.beginObject()
         while (jsonReader.hasNext()) {
             val key = jsonReader.nextName()
-            val hash = key.toIntOrNull()
+            val hash = key.toLongOrNull()
                     ?: throw InvalidViewerConfigException("Invalid key in messages viewer config")
             config[hash] = parseMessage(jsonReader)
         }
@@ -89,8 +89,8 @@
 
     data class ConfigEntry(val messageString: String, val level: String, val tag: String)
 
-    open fun parseConfig(jsonReader: JsonReader): Map<Int, ConfigEntry> {
-        var messages: Map<Int, MessageEntry>? = null
+    open fun parseConfig(jsonReader: JsonReader): Map<Long, ConfigEntry> {
+        var messages: Map<Long, MessageEntry>? = null
         var groups: Map<String, GroupEntry>? = null
         var version: String? = null
 
diff --git a/tools/protologtool/src/com/android/protolog/tool/ViewerConfigProtoBuilder.kt b/tools/protologtool/src/com/android/protolog/tool/ViewerConfigProtoBuilder.kt
new file mode 100644
index 0000000..cf0876a
--- /dev/null
+++ b/tools/protologtool/src/com/android/protolog/tool/ViewerConfigProtoBuilder.kt
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.protolog.tool
+
+import perfetto.protos.PerfettoTrace.ProtoLogLevel
+import perfetto.protos.PerfettoTrace.ProtoLogViewerConfig
+
+/**
+ * A builder class to construct the viewer configuration (i.e. mappings of protolog hashes to log
+ * message information used to decode the protolog messages) encoded as a proto message.
+ */
+class ViewerConfigProtoBuilder : ProtoLogTool.ProtologViewerConfigBuilder {
+    /**
+     * @return a byte array of a ProtoLogViewerConfig proto message encoding all the viewer
+     * configurations mapping protolog hashes to message information and log group information.
+     */
+    override fun build(statements: Map<ProtoLogTool.LogCall, Long>): ByteArray {
+        val configBuilder = ProtoLogViewerConfig.newBuilder()
+
+        val groups = statements.map { it.key.logGroup }.toSet()
+        val groupIds = mutableMapOf<LogGroup, Int>()
+        groups.forEach {
+            groupIds.putIfAbsent(it, groupIds.size + 1)
+        }
+
+        groupIds.forEach { (group, id) ->
+            configBuilder.addGroups(ProtoLogViewerConfig.Group.newBuilder()
+                    .setId(id)
+                    .setName(group.name)
+                    .setTag(group.tag)
+                    .build())
+        }
+
+        statements.forEach { (log, key) ->
+            val groupId = groupIds[log.logGroup] ?: error("missing group id")
+
+            configBuilder.addMessages(
+                ProtoLogViewerConfig.MessageData.newBuilder()
+                        .setMessageId(key)
+                        .setMessage(log.messageString)
+                        .setLevel(
+                            ProtoLogLevel.forNumber(log.logLevel.ordinal + 1))
+                        .setGroupId(groupId)
+            )
+        }
+
+        return configBuilder.build().toByteArray()
+    }
+}
diff --git a/tools/protologtool/tests/com/android/protolog/tool/CodeUtilsTest.kt b/tools/protologtool/tests/com/android/protolog/tool/CodeUtilsTest.kt
index b08d859..0cd02a5c 100644
--- a/tools/protologtool/tests/com/android/protolog/tool/CodeUtilsTest.kt
+++ b/tools/protologtool/tests/com/android/protolog/tool/CodeUtilsTest.kt
@@ -28,31 +28,31 @@
 class CodeUtilsTest {
     @Test
     fun hash() {
-        assertEquals(-1259556708, CodeUtils.hash("Test.java:50", "test",
+        assertEquals(3883826472308915399, CodeUtils.hash("Test.java:50", "test",
                 LogLevel.DEBUG, LogGroup("test", true, true, "TAG")))
     }
 
     @Test
     fun hash_changeLocation() {
-        assertEquals(15793504, CodeUtils.hash("Test.java:10", "test2",
+        assertEquals(4125273133972468649, CodeUtils.hash("Test.java:10", "test2",
                 LogLevel.DEBUG, LogGroup("test", true, true, "TAG")))
     }
 
     @Test
     fun hash_changeLevel() {
-        assertEquals(-731772463, CodeUtils.hash("Test.java:50", "test",
+        assertEquals(2618535069521361990, CodeUtils.hash("Test.java:50", "test",
                 LogLevel.ERROR, LogGroup("test", true, true, "TAG")))
     }
 
     @Test
     fun hash_changeMessage() {
-        assertEquals(-2026343204, CodeUtils.hash("Test.java:50", "test2",
+        assertEquals(8907822592109789043, CodeUtils.hash("Test.java:50", "test2",
                 LogLevel.DEBUG, LogGroup("test", true, true, "TAG")))
     }
 
     @Test
     fun hash_changeGroup() {
-        assertEquals(1607870166, CodeUtils.hash("Test.java:50", "test2",
+        assertEquals(-1299517016176640015, CodeUtils.hash("Test.java:50", "test2",
                 LogLevel.DEBUG, LogGroup("test2", true, true, "TAG")))
     }
 
diff --git a/tools/protologtool/tests/com/android/protolog/tool/CommandOptionsTest.kt b/tools/protologtool/tests/com/android/protolog/tool/CommandOptionsTest.kt
index 3cfbb43..5ef2833 100644
--- a/tools/protologtool/tests/com/android/protolog/tool/CommandOptionsTest.kt
+++ b/tools/protologtool/tests/com/android/protolog/tool/CommandOptionsTest.kt
@@ -16,7 +16,9 @@
 
 package com.android.protolog.tool
 
+import com.google.common.truth.Truth.assertThat
 import org.junit.Assert.assertEquals
+import org.junit.Assert.assertThrows
 import org.junit.Test
 
 class CommandOptionsTest {
@@ -35,6 +37,10 @@
         private const val TEST_PROTOLOGGROUP_JAR = "out/soong/.intermediates/frameworks/base/" +
                 "services/core/services.core.wm.protologgroups/android_common/javac/" +
                 "services.core.wm.protologgroups.jar"
+        private const val TEST_VIEWER_CONFIG_FILE_PATH = "/some/viewer/config/file/path.pb"
+        private const val TEST_LEGACY_VIEWER_CONFIG_FILE_PATH =
+            "/some/viewer/config/file/path.json.gz"
+        private const val TEST_LEGACY_OUTPUT_FILE_PATH = "/some/output/file/path.winscope"
         private const val TEST_SRC_JAR = "out/soong/.temp/sbox175955373/" +
                 "services.core.wm.protolog.srcjar"
         private const val TEST_VIEWER_JSON = "out/soong/.temp/sbox175955373/" +
@@ -42,186 +48,263 @@
         private const val TEST_LOG = "./test_log.pb"
     }
 
-    @Test(expected = InvalidCommandException::class)
+    @Test
     fun noCommand() {
-        CommandOptions(arrayOf())
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(arrayOf())
+        }
+        assertThat(exception).hasMessageThat().contains("No command specified")
     }
 
-    @Test(expected = InvalidCommandException::class)
+    @Test
     fun invalidCommand() {
         val testLine = "invalid"
-        CommandOptions(testLine.split(' ').toTypedArray())
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat().contains("Unknown command")
     }
 
     @Test
     fun transformClasses() {
-        val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
-                "--protolog-impl-class $TEST_PROTOLOGIMPL_CLASS " +
-                "--protolog-cache-class $TEST_PROTOLOGCACHE_CLASS " +
+        val testLine = "transform-protolog-calls " +
+                "--protolog-class $TEST_PROTOLOG_CLASS " +
                 "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
                 "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
+                "--viewer-config-file-path $TEST_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-viewer-config-file-path $TEST_LEGACY_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-output-file-path $TEST_LEGACY_OUTPUT_FILE_PATH " +
                 "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
         val cmd = CommandOptions(testLine.split(' ').toTypedArray())
         assertEquals(CommandOptions.TRANSFORM_CALLS_CMD, cmd.command)
         assertEquals(TEST_PROTOLOG_CLASS, cmd.protoLogClassNameArg)
-        assertEquals(TEST_PROTOLOGIMPL_CLASS, cmd.protoLogImplClassNameArg)
         assertEquals(TEST_PROTOLOGGROUP_CLASS, cmd.protoLogGroupsClassNameArg)
         assertEquals(TEST_PROTOLOGGROUP_JAR, cmd.protoLogGroupsJarArg)
+        assertEquals(TEST_VIEWER_CONFIG_FILE_PATH, cmd.viewerConfigFilePathArg)
+        assertEquals(TEST_LEGACY_VIEWER_CONFIG_FILE_PATH, cmd.legacyViewerConfigFilePathArg)
+        assertEquals(TEST_LEGACY_OUTPUT_FILE_PATH, cmd.legacyOutputFilePath)
         assertEquals(TEST_SRC_JAR, cmd.outputSourceJarArg)
         assertEquals(TEST_JAVA_SRC, cmd.javaSourceArgs)
     }
 
-    @Test(expected = InvalidCommandException::class)
+    @Test
+    fun transformClasses_noViewerConfigFile() {
+        val testLine = "transform-protolog-calls " +
+                "--protolog-class $TEST_PROTOLOG_CLASS " +
+                "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
+                "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
+                "--legacy-viewer-config-file-path $TEST_LEGACY_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-output-file-path $TEST_LEGACY_OUTPUT_FILE_PATH " +
+                "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat().contains("--viewer-config-file-path")
+    }
+
+    @Test
+    fun transformClasses_noLegacyViewerConfigFile() {
+        val testLine = "transform-protolog-calls " +
+                "--protolog-class $TEST_PROTOLOG_CLASS " +
+                "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
+                "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
+                "--viewer-config-file-path $TEST_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-output-file-path $TEST_LEGACY_OUTPUT_FILE_PATH " +
+                "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
+        val cmd = CommandOptions(testLine.split(' ').toTypedArray())
+        assertEquals(CommandOptions.TRANSFORM_CALLS_CMD, cmd.command)
+        assertEquals(TEST_PROTOLOG_CLASS, cmd.protoLogClassNameArg)
+        assertEquals(TEST_PROTOLOGGROUP_CLASS, cmd.protoLogGroupsClassNameArg)
+        assertEquals(TEST_PROTOLOGGROUP_JAR, cmd.protoLogGroupsJarArg)
+        assertEquals(TEST_VIEWER_CONFIG_FILE_PATH, cmd.viewerConfigFilePathArg)
+        assertEquals(null, cmd.legacyViewerConfigFilePathArg)
+        assertEquals(TEST_LEGACY_OUTPUT_FILE_PATH, cmd.legacyOutputFilePath)
+        assertEquals(TEST_SRC_JAR, cmd.outputSourceJarArg)
+        assertEquals(TEST_JAVA_SRC, cmd.javaSourceArgs)
+    }
+
+    @Test
+    fun transformClasses_noLegacyOutputFile() {
+        val testLine = "transform-protolog-calls " +
+                "--protolog-class $TEST_PROTOLOG_CLASS " +
+                "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
+                "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
+                "--viewer-config-file-path $TEST_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-viewer-config-file-path $TEST_LEGACY_VIEWER_CONFIG_FILE_PATH " +
+                "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
+        val cmd = CommandOptions(testLine.split(' ').toTypedArray())
+        assertEquals(CommandOptions.TRANSFORM_CALLS_CMD, cmd.command)
+        assertEquals(TEST_PROTOLOG_CLASS, cmd.protoLogClassNameArg)
+        assertEquals(TEST_PROTOLOGGROUP_CLASS, cmd.protoLogGroupsClassNameArg)
+        assertEquals(TEST_PROTOLOGGROUP_JAR, cmd.protoLogGroupsJarArg)
+        assertEquals(TEST_VIEWER_CONFIG_FILE_PATH, cmd.viewerConfigFilePathArg)
+        assertEquals(TEST_LEGACY_VIEWER_CONFIG_FILE_PATH, cmd.legacyViewerConfigFilePathArg)
+        assertEquals(null, cmd.legacyOutputFilePath)
+        assertEquals(TEST_SRC_JAR, cmd.outputSourceJarArg)
+        assertEquals(TEST_JAVA_SRC, cmd.javaSourceArgs)
+    }
+
+    @Test
     fun transformClasses_noProtoLogClass() {
         val testLine = "transform-protolog-calls " +
-                "--protolog-impl-class $TEST_PROTOLOGIMPL_CLASS " +
-                "--protolog-cache-class $TEST_PROTOLOGCACHE_CLASS " +
                 "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
                 "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
+                "--viewer-config-file-path $TEST_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-viewer-config-file-path $TEST_LEGACY_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-output-file-path $TEST_LEGACY_OUTPUT_FILE_PATH " +
                 "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
-        CommandOptions(testLine.split(' ').toTypedArray())
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat().contains("--protolog-class")
     }
 
-    @Test(expected = InvalidCommandException::class)
-    fun transformClasses_noProtoLogImplClass() {
-        val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
-                "--protolog-cache-class $TEST_PROTOLOGCACHE_CLASS " +
-                "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
-                "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
-                "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
-        CommandOptions(testLine.split(' ').toTypedArray())
-    }
-
-    @Test(expected = InvalidCommandException::class)
-    fun transformClasses_noProtoLogCacheClass() {
-        val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
-                "--protolog-impl-class $TEST_PROTOLOGIMPL_CLASS " +
-                "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
-                "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
-                "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
-        CommandOptions(testLine.split(' ').toTypedArray())
-    }
-
-    @Test(expected = InvalidCommandException::class)
+    @Test
     fun transformClasses_noProtoLogGroupClass() {
-        val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
-                "--protolog-impl-class $TEST_PROTOLOGIMPL_CLASS " +
-                "--protolog-cache-class $TEST_PROTOLOGCACHE_CLASS " +
+        val testLine = "transform-protolog-calls " +
+                "--protolog-class $TEST_PROTOLOG_CLASS " +
                 "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
+                "--viewer-config-file-path $TEST_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-viewer-config-file-path $TEST_LEGACY_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-output-file-path $TEST_LEGACY_OUTPUT_FILE_PATH " +
                 "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
-        CommandOptions(testLine.split(' ').toTypedArray())
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat().contains("--loggroups-class")
     }
 
-    @Test(expected = InvalidCommandException::class)
+    @Test
     fun transformClasses_noProtoLogGroupJar() {
-        val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
-                "--protolog-impl-class $TEST_PROTOLOGIMPL_CLASS " +
-                "--protolog-cache-class $TEST_PROTOLOGCACHE_CLASS " +
+        val testLine = "transform-protolog-calls " +
+                "--protolog-class $TEST_PROTOLOG_CLASS " +
                 "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
+                "--viewer-config-file-path $TEST_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-viewer-config-file-path $TEST_LEGACY_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-output-file-path $TEST_LEGACY_OUTPUT_FILE_PATH " +
                 "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
-        CommandOptions(testLine.split(' ').toTypedArray())
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat().contains("--loggroups-jar")
     }
 
-    @Test(expected = InvalidCommandException::class)
+    @Test
     fun transformClasses_noOutJar() {
-        val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
-                "--protolog-impl-class $TEST_PROTOLOGIMPL_CLASS " +
-                "--protolog-cache-class $TEST_PROTOLOGCACHE_CLASS " +
+        val testLine = "transform-protolog-calls " +
+                "--protolog-class $TEST_PROTOLOG_CLASS " +
                 "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
                 "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
-                TEST_JAVA_SRC.joinToString(" ")
-        CommandOptions(testLine.split(' ').toTypedArray())
+                "--viewer-config-file-path $TEST_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-viewer-config-file-path $TEST_LEGACY_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-output-file-path $TEST_LEGACY_OUTPUT_FILE_PATH " +
+                "${TEST_JAVA_SRC.joinToString(" ")}"
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat().contains("--output-srcjar")
     }
 
-    @Test(expected = InvalidCommandException::class)
+    @Test
     fun transformClasses_noJavaInput() {
-        val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
-                "--protolog-impl-class $TEST_PROTOLOGIMPL_CLASS " +
-                "--protolog-cache-class $TEST_PROTOLOGCACHE_CLASS " +
+        val testLine = "transform-protolog-calls " +
+                "--protolog-class $TEST_PROTOLOG_CLASS " +
                 "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
                 "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
+                "--viewer-config-file-path $TEST_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-viewer-config-file-path $TEST_LEGACY_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-output-file-path $TEST_LEGACY_OUTPUT_FILE_PATH " +
                 "--output-srcjar $TEST_SRC_JAR"
-        CommandOptions(testLine.split(' ').toTypedArray())
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat().contains("No java source input files")
     }
 
-    @Test(expected = InvalidCommandException::class)
+    @Test
     fun transformClasses_invalidProtoLogClass() {
-        val testLine = "transform-protolog-calls --protolog-class invalid " +
-                "--protolog-impl-class $TEST_PROTOLOGIMPL_CLASS " +
-                "--protolog-cache-class $TEST_PROTOLOGCACHE_CLASS " +
+        val testLine = "transform-protolog-calls " +
+                "--protolog-class invalid " +
                 "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
                 "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
+                "--viewer-config-file-path $TEST_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-viewer-config-file-path $TEST_LEGACY_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-output-file-path $TEST_LEGACY_OUTPUT_FILE_PATH " +
                 "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
-        CommandOptions(testLine.split(' ').toTypedArray())
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat().contains("class name invalid")
     }
 
-    @Test(expected = InvalidCommandException::class)
-    fun transformClasses_invalidProtoLogImplClass() {
-        val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
-                "--protolog-impl-class invalid " +
-                "--protolog-cache-class $TEST_PROTOLOGCACHE_CLASS " +
-                "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
-                "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
-                "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
-        CommandOptions(testLine.split(' ').toTypedArray())
-    }
-
-    @Test(expected = InvalidCommandException::class)
-    fun transformClasses_invalidProtoLogCacheClass() {
-        val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
-                "--protolog-impl-class $TEST_PROTOLOGIMPL_CLASS " +
-                "--protolog-cache-class invalid " +
-                "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
-                "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
-                "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
-        CommandOptions(testLine.split(' ').toTypedArray())
-    }
-
-    @Test(expected = InvalidCommandException::class)
+    @Test
     fun transformClasses_invalidProtoLogGroupClass() {
-        val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
-                "--protolog-impl-class $TEST_PROTOLOGIMPL_CLASS " +
-                "--protolog-cache-class $TEST_PROTOLOGCACHE_CLASS " +
+        val testLine = "transform-protolog-calls " +
+                "--protolog-class $TEST_PROTOLOG_CLASS " +
                 "--loggroups-class invalid " +
                 "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
+                "--viewer-config-file-path $TEST_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-viewer-config-file-path $TEST_LEGACY_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-output-file-path $TEST_LEGACY_OUTPUT_FILE_PATH " +
                 "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
-        CommandOptions(testLine.split(' ').toTypedArray())
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat().contains("class name invalid")
     }
 
-    @Test(expected = InvalidCommandException::class)
+    @Test
     fun transformClasses_invalidProtoLogGroupJar() {
-        val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
-                "--protolog-impl-class $TEST_PROTOLOGIMPL_CLASS " +
-                "--protolog-cache-class $TEST_PROTOLOGCACHE_CLASS " +
+        val testLine = "transform-protolog-calls " +
+                "--protolog-class $TEST_PROTOLOG_CLASS " +
                 "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
                 "--loggroups-jar invalid.txt " +
+                "--viewer-config-file-path $TEST_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-viewer-config-file-path $TEST_LEGACY_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-output-file-path $TEST_LEGACY_OUTPUT_FILE_PATH " +
                 "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
-        CommandOptions(testLine.split(' ').toTypedArray())
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat()
+                .contains("Jar file required, got invalid.txt instead")
     }
 
-    @Test(expected = InvalidCommandException::class)
+    @Test
     fun transformClasses_invalidOutJar() {
-        val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
-                "--protolog-impl-class $TEST_PROTOLOGIMPL_CLASS " +
-                "--protolog-cache-class $TEST_PROTOLOGCACHE_CLASS " +
+        val testLine = "transform-protolog-calls " +
+                "--protolog-class $TEST_PROTOLOG_CLASS " +
                 "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
                 "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
-                "--output-srcjar invalid.db ${TEST_JAVA_SRC.joinToString(" ")}"
-        CommandOptions(testLine.split(' ').toTypedArray())
+                "--viewer-config-file-path $TEST_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-viewer-config-file-path $TEST_LEGACY_VIEWER_CONFIG_FILE_PATH " +
+                "--legacy-output-file-path $TEST_LEGACY_OUTPUT_FILE_PATH " +
+                "--output-srcjar invalid.pb ${TEST_JAVA_SRC.joinToString(" ")}"
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat()
+                .contains("Source jar file required, got invalid.pb instead")
     }
 
-    @Test(expected = InvalidCommandException::class)
+    @Test
     fun transformClasses_invalidJavaInput() {
-        val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
-                "--protolog-impl-class $TEST_PROTOLOGIMPL_CLASS " +
-                "--protolog-cache-class $TEST_PROTOLOGCACHE_CLASS " +
-                "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
-                "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
-                "--output-srcjar $TEST_SRC_JAR invalid.py"
-        CommandOptions(testLine.split(' ').toTypedArray())
+            val testLine = "transform-protolog-calls " +
+                    "--protolog-class $TEST_PROTOLOG_CLASS " +
+                    "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
+                    "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
+                    "--viewer-config-file-path $TEST_VIEWER_CONFIG_FILE_PATH " +
+                    "--legacy-viewer-config-file-path $TEST_LEGACY_VIEWER_CONFIG_FILE_PATH " +
+                    "--legacy-output-file-path $TEST_LEGACY_OUTPUT_FILE_PATH " +
+                    "--output-srcjar $TEST_SRC_JAR invalid.py"
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat()
+                .contains("Not a java or kotlin source file invalid.py")
     }
 
-    @Test(expected = InvalidCommandException::class)
+    @Test
     fun transformClasses_unknownParam() {
         val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
                 "--unknown test --protolog-impl-class $TEST_PROTOLOGIMPL_CLASS " +
@@ -229,59 +312,88 @@
                 "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
                 "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
                 "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
-        CommandOptions(testLine.split(' ').toTypedArray())
-    }
-
-    @Test(expected = InvalidCommandException::class)
-    fun transformClasses_noValue() {
-        val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
-                "--protolog-impl-class " +
-                "--protolog-cache-class $TEST_PROTOLOGCACHE_CLASS " +
-                "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
-                "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
-                "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
-        CommandOptions(testLine.split(' ').toTypedArray())
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat().contains("--unknown")
     }
 
     @Test
-    fun generateConfig() {
-        val testLine = "generate-viewer-config --protolog-class $TEST_PROTOLOG_CLASS " +
+    fun transformClasses_noValue() {
+        val testLine = "transform-protolog-calls --protolog-class $TEST_PROTOLOG_CLASS " +
+                "--loggroups-class " +
+                "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
+                "--output-srcjar $TEST_SRC_JAR ${TEST_JAVA_SRC.joinToString(" ")}"
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat().contains("No value for --loggroups-class")
+    }
+
+    @Test
+    fun generateConfig_json() {
+        val testLine = "generate-viewer-config " +
+                "--protolog-class $TEST_PROTOLOG_CLASS " +
                 "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
                 "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
-                "--viewer-conf $TEST_VIEWER_JSON ${TEST_JAVA_SRC.joinToString(" ")}"
+                "--viewer-config-type json " +
+                "--viewer-config $TEST_VIEWER_JSON ${TEST_JAVA_SRC.joinToString(" ")}"
         val cmd = CommandOptions(testLine.split(' ').toTypedArray())
         assertEquals(CommandOptions.GENERATE_CONFIG_CMD, cmd.command)
         assertEquals(TEST_PROTOLOG_CLASS, cmd.protoLogClassNameArg)
         assertEquals(TEST_PROTOLOGGROUP_CLASS, cmd.protoLogGroupsClassNameArg)
         assertEquals(TEST_PROTOLOGGROUP_JAR, cmd.protoLogGroupsJarArg)
-        assertEquals(TEST_VIEWER_JSON, cmd.viewerConfigJsonArg)
+        assertEquals(TEST_VIEWER_JSON, cmd.viewerConfigFileNameArg)
         assertEquals(TEST_JAVA_SRC, cmd.javaSourceArgs)
     }
 
-    @Test(expected = InvalidCommandException::class)
+    @Test
+    fun generateConfig_proto() {
+        val testLine = "generate-viewer-config " +
+                "--protolog-class $TEST_PROTOLOG_CLASS " +
+                "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
+                "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
+                "--viewer-config-type proto " +
+                "--viewer-config $TEST_VIEWER_JSON ${TEST_JAVA_SRC.joinToString(" ")}"
+        val cmd = CommandOptions(testLine.split(' ').toTypedArray())
+        assertEquals(CommandOptions.GENERATE_CONFIG_CMD, cmd.command)
+        assertEquals(TEST_PROTOLOG_CLASS, cmd.protoLogClassNameArg)
+        assertEquals(TEST_PROTOLOGGROUP_CLASS, cmd.protoLogGroupsClassNameArg)
+        assertEquals(TEST_PROTOLOGGROUP_JAR, cmd.protoLogGroupsJarArg)
+        assertEquals(TEST_VIEWER_JSON, cmd.viewerConfigFileNameArg)
+        assertEquals(TEST_JAVA_SRC, cmd.javaSourceArgs)
+    }
+
+    @Test
     fun generateConfig_noViewerConfig() {
         val testLine = "generate-viewer-config --protolog-class $TEST_PROTOLOG_CLASS " +
                 "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
                 "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
                 TEST_JAVA_SRC.joinToString(" ")
-        CommandOptions(testLine.split(' ').toTypedArray())
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat().contains("--viewer-config required")
     }
 
-    @Test(expected = InvalidCommandException::class)
+    @Test
     fun generateConfig_invalidViewerConfig() {
         val testLine = "generate-viewer-config --protolog-class $TEST_PROTOLOG_CLASS " +
                 "--loggroups-class $TEST_PROTOLOGGROUP_CLASS " +
                 "--loggroups-jar $TEST_PROTOLOGGROUP_JAR " +
-                "--viewer-conf invalid.yaml ${TEST_JAVA_SRC.joinToString(" ")}"
-        CommandOptions(testLine.split(' ').toTypedArray())
+                "--viewer-config invalid.yaml ${TEST_JAVA_SRC.joinToString(" ")}"
+        val exception = assertThrows<InvalidCommandException>(InvalidCommandException::class.java) {
+            CommandOptions(testLine.split(' ').toTypedArray())
+        }
+        assertThat(exception).hasMessageThat().contains("required, got invalid.yaml instead")
     }
 
     @Test
     fun readLog() {
-        val testLine = "read-log --viewer-conf $TEST_VIEWER_JSON $TEST_LOG"
+        val testLine = "read-log --viewer-config $TEST_VIEWER_JSON $TEST_LOG"
         val cmd = CommandOptions(testLine.split(' ').toTypedArray())
         assertEquals(CommandOptions.READ_LOG_CMD, cmd.command)
-        assertEquals(TEST_VIEWER_JSON, cmd.viewerConfigJsonArg)
+        assertEquals(TEST_VIEWER_JSON, cmd.viewerConfigFileNameArg)
         assertEquals(TEST_LOG, cmd.logProtofileArg)
     }
 }
diff --git a/tools/protologtool/tests/com/android/protolog/tool/EndToEndTest.kt b/tools/protologtool/tests/com/android/protolog/tool/EndToEndTest.kt
index 0d2b91d..822118c 100644
--- a/tools/protologtool/tests/com/android/protolog/tool/EndToEndTest.kt
+++ b/tools/protologtool/tests/com/android/protolog/tool/EndToEndTest.kt
@@ -16,22 +16,24 @@
 
 package com.android.protolog.tool
 
-import org.junit.Assert
-import org.junit.Assert.assertTrue
-import org.junit.Test
+import com.android.protolog.tool.ProtoLogTool.PROTOLOG_IMPL_SRC_PATH
+import com.google.common.truth.Truth
 import java.io.ByteArrayInputStream
 import java.io.ByteArrayOutputStream
 import java.io.File
 import java.io.FileNotFoundException
 import java.io.OutputStream
 import java.util.jar.JarInputStream
+import java.util.regex.Pattern
+import org.junit.Assert
+import org.junit.Test
 
 class EndToEndTest {
 
     @Test
     fun e2e_transform() {
         val output = run(
-                src = "frameworks/base/org/example/Example.java" to """
+                srcs = mapOf("frameworks/base/org/example/Example.java" to """
                     package org.example;
                     import com.android.internal.protolog.common.ProtoLog;
                     import static com.android.internal.protolog.ProtoLogGroup.GROUP;
@@ -43,26 +45,29 @@
                             ProtoLog.d(GROUP, "Example: %s %d", argString, argInt);
                         }
                     }
-                """.trimIndent(),
+                """.trimIndent()),
                 logGroup = LogGroup("GROUP", true, false, "TAG_GROUP"),
                 commandOptions = CommandOptions(arrayOf("transform-protolog-calls",
                         "--protolog-class", "com.android.internal.protolog.common.ProtoLog",
-                        "--protolog-impl-class", "com.android.internal.protolog.ProtoLogImpl",
-                        "--protolog-cache-class",
-                        "com.android.server.wm.ProtoLogCache",
                         "--loggroups-class", "com.android.internal.protolog.ProtoLogGroup",
                         "--loggroups-jar", "not_required.jar",
+                        "--viewer-config-file-path", "not_required.pb",
                         "--output-srcjar", "out.srcjar",
                         "frameworks/base/org/example/Example.java"))
         )
         val outSrcJar = assertLoadSrcJar(output, "out.srcjar")
-        assertTrue(" 2066303299," in outSrcJar["frameworks/base/org/example/Example.java"]!!)
+        Truth.assertThat(outSrcJar["frameworks/base/org/example/Example.java"])
+                .containsMatch(Pattern.compile("\\{ String protoLogParam0 = " +
+                        "String\\.valueOf\\(argString\\); long protoLogParam1 = argInt; " +
+                        "com\\.android\\.internal\\.protolog.ProtoLogImpl_.*\\.d\\(" +
+                        "GROUP, -6872339441335321086L, 4, null, protoLogParam0, protoLogParam1" +
+                        "\\); \\}"))
     }
 
     @Test
     fun e2e_viewerConfig() {
         val output = run(
-                src = "frameworks/base/org/example/Example.java" to """
+                srcs = mapOf("frameworks/base/org/example/Example.java" to """
                     package org.example;
                     import com.android.internal.protolog.common.ProtoLog;
                     import static com.android.internal.protolog.ProtoLogGroup.GROUP;
@@ -74,17 +79,27 @@
                             ProtoLog.d(GROUP, "Example: %s %d", argString, argInt);
                         }
                     }
-                """.trimIndent(),
+                """.trimIndent()),
                 logGroup = LogGroup("GROUP", true, false, "TAG_GROUP"),
                 commandOptions = CommandOptions(arrayOf("generate-viewer-config",
                         "--protolog-class", "com.android.internal.protolog.common.ProtoLog",
                         "--loggroups-class", "com.android.internal.protolog.ProtoLogGroup",
                         "--loggroups-jar", "not_required.jar",
-                        "--viewer-conf", "out.json",
+                        "--viewer-config-type", "json",
+                        "--viewer-config", "out.json",
                         "frameworks/base/org/example/Example.java"))
         )
         val viewerConfigJson = assertLoadText(output, "out.json")
-        assertTrue("\"2066303299\"" in viewerConfigJson)
+        Truth.assertThat(viewerConfigJson).contains("""
+            "messages": {
+                "-6872339441335321086": {
+                  "message": "Example: %s %d",
+                  "level": "DEBUG",
+                  "group": "GROUP",
+                  "at": "org\/example\/Example.java"
+                }
+              }
+        """.trimIndent())
     }
 
     private fun assertLoadSrcJar(
@@ -112,21 +127,46 @@
     }
 
     fun run(
-        src: Pair<String, String>,
+        srcs: Map<String, String>,
         logGroup: LogGroup,
         commandOptions: CommandOptions
     ): Map<String, ByteArray> {
         val outputs = mutableMapOf<String, ByteArrayOutputStream>()
 
+        val srcs = srcs.toMutableMap()
+        srcs[PROTOLOG_IMPL_SRC_PATH] = """
+            package com.android.internal.protolog;
+
+            import static com.android.internal.protolog.common.ProtoLogToolInjected.Value.LEGACY_OUTPUT_FILE_PATH;
+            import static com.android.internal.protolog.common.ProtoLogToolInjected.Value.LEGACY_VIEWER_CONFIG_PATH;
+            import static com.android.internal.protolog.common.ProtoLogToolInjected.Value.VIEWER_CONFIG_PATH;
+
+            import com.android.internal.protolog.common.ProtoLogToolInjected;
+
+            public class ProtoLogImpl {
+                @ProtoLogToolInjected(VIEWER_CONFIG_PATH)
+                private static String sViewerConfigPath;
+
+                @ProtoLogToolInjected(LEGACY_VIEWER_CONFIG_PATH)
+                private static String sLegacyViewerConfigPath;
+
+                @ProtoLogToolInjected(LEGACY_OUTPUT_FILE_PATH)
+                private static String sLegacyOutputFilePath;
+            }
+        """.trimIndent()
+
         ProtoLogTool.injector = object : ProtoLogTool.Injector {
             override fun fileOutputStream(file: String): OutputStream =
                     ByteArrayOutputStream().also { outputs[file] = it }
 
             override fun readText(file: File): String {
-                if (file.path == src.first) {
-                    return src.second
+                for (src in srcs.entries) {
+                    val filePath = src.key
+                    if (file.path == filePath) {
+                        return src.value
+                    }
                 }
-                throw FileNotFoundException("expected: ${src.first}, but was $file")
+                throw FileNotFoundException("$file not found in [${srcs.keys.joinToString()}].")
             }
 
             override fun readLogGroups(jarPath: String, className: String) = mapOf(
diff --git a/tools/protologtool/tests/com/android/protolog/tool/LogParserTest.kt b/tools/protologtool/tests/com/android/protolog/tool/LogParserTest.kt
index 512d90c..1d32702 100644
--- a/tools/protologtool/tests/com/android/protolog/tool/LogParserTest.kt
+++ b/tools/protologtool/tests/com/android/protolog/tool/LogParserTest.kt
@@ -35,7 +35,7 @@
 class LogParserTest {
     private val configParser: ViewerConfigParser = mock(ViewerConfigParser::class.java)
     private val parser = LogParser(configParser)
-    private var config: MutableMap<Int, ViewerConfigParser.ConfigEntry> = mutableMapOf()
+    private var config: MutableMap<Long, ViewerConfigParser.ConfigEntry> = mutableMapOf()
     private var outStream: OutputStream = ByteArrayOutputStream()
     private var printStream: PrintStream = PrintStream(outStream)
     private val dateFormat = SimpleDateFormat("MM-dd HH:mm:ss.SSS", Locale.US)
diff --git a/tools/protologtool/tests/com/android/protolog/tool/ProtoLogCallProcessorTest.kt b/tools/protologtool/tests/com/android/protolog/tool/ProtoLogCallProcessorImplTest.kt
similarity index 96%
rename from tools/protologtool/tests/com/android/protolog/tool/ProtoLogCallProcessorTest.kt
rename to tools/protologtool/tests/com/android/protolog/tool/ProtoLogCallProcessorImplTest.kt
index 90b8059..5e50f71 100644
--- a/tools/protologtool/tests/com/android/protolog/tool/ProtoLogCallProcessorTest.kt
+++ b/tools/protologtool/tests/com/android/protolog/tool/ProtoLogCallProcessorImplTest.kt
@@ -22,7 +22,7 @@
 import org.junit.Assert.assertEquals
 import org.junit.Test
 
-class ProtoLogCallProcessorTest {
+class ProtoLogCallProcessorImplTest {
     private data class LogCall(
         val call: MethodCallExpr,
         val messageString: String,
@@ -32,8 +32,11 @@
 
     private val groupMap: MutableMap<String, LogGroup> = mutableMapOf()
     private val calls: MutableList<LogCall> = mutableListOf()
-    private val visitor = ProtoLogCallProcessor("org.example.ProtoLog", "org.example.ProtoLogGroup",
-            groupMap)
+    private val visitor = ProtoLogCallProcessorImpl(
+        "org.example.ProtoLog",
+        "org.example.ProtoLogGroup",
+            groupMap
+    )
     private val processor = object : ProtoLogCallVisitor {
         override fun processCall(
             call: MethodCallExpr,
diff --git a/tools/protologtool/tests/com/android/protolog/tool/ProtoLogToolTest.kt b/tools/protologtool/tests/com/android/protolog/tool/ProtoLogToolTest.kt
deleted file mode 100644
index ea9a58d..0000000
--- a/tools/protologtool/tests/com/android/protolog/tool/ProtoLogToolTest.kt
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.protolog.tool
-
-import org.junit.Assert.assertEquals
-import org.junit.Test
-
-class ProtoLogToolTest {
-
-    @Test
-    fun generateLogGroupCache() {
-        val groups = mapOf(
-                "GROUP1" to LogGroup("GROUP1", true, true, "TAG1"),
-                "GROUP2" to LogGroup("GROUP2", true, true, "TAG2")
-        )
-        val code = ProtoLogTool.generateLogGroupCache("org.example", "ProtoLog\$Cache",
-                groups, "org.example.ProtoLogImpl", "org.example.ProtoLogGroups")
-
-        assertEquals("""
-            package org.example;
-
-            public class ProtoLog${'$'}Cache {
-                public static boolean GROUP1_enabled = false;
-                public static boolean GROUP2_enabled = false;
-
-                static {
-                    org.example.ProtoLogImpl.sCacheUpdater = ProtoLog${'$'}Cache::update;
-                    update();
-                }
-
-                static void update() {
-                    GROUP1_enabled = org.example.ProtoLogImpl.isEnabled(org.example.ProtoLogGroups.GROUP1);
-                    GROUP2_enabled = org.example.ProtoLogImpl.isEnabled(org.example.ProtoLogGroups.GROUP2);
-                }
-            }
-        """.trimIndent(), code)
-    }
-}
\ No newline at end of file
diff --git a/tools/protologtool/tests/com/android/protolog/tool/SourceTransformerTest.kt b/tools/protologtool/tests/com/android/protolog/tool/SourceTransformerTest.kt
index f52bfec..de0b5ba 100644
--- a/tools/protologtool/tests/com/android/protolog/tool/SourceTransformerTest.kt
+++ b/tools/protologtool/tests/com/android/protolog/tool/SourceTransformerTest.kt
@@ -20,17 +20,14 @@
 import com.github.javaparser.StaticJavaParser
 import com.github.javaparser.ast.CompilationUnit
 import com.github.javaparser.ast.expr.MethodCallExpr
-import com.github.javaparser.ast.stmt.IfStmt
+import com.google.common.truth.Truth
 import org.junit.Assert.assertEquals
-import org.junit.Assert.assertFalse
 import org.junit.Test
 import org.mockito.Mockito
 
 class SourceTransformerTest {
     companion object {
-        private const val PROTO_LOG_IMPL_PATH = "org.example.ProtoLogImpl"
 
-        /* ktlint-disable max-line-length */
         private val TEST_CODE = """
             package org.example;
 
@@ -79,7 +76,7 @@
 
             class Test {
                 void test() {
-                    if (org.example.ProtoLogCache.TEST_GROUP_enabled) { long protoLogParam0 = 100; double protoLogParam1 = 0.1; org.example.ProtoLogImpl.w(TEST_GROUP, 1698911065, 9, "test %d %f", protoLogParam0, protoLogParam1); }
+                    { long protoLogParam0 = 100; double protoLogParam1 = 0.1; org.example.ProtoLogImpl.w(TEST_GROUP, -1473209266730422156L, 9, "test %d %f", protoLogParam0, protoLogParam1); }
                 }
             }
             """.trimIndent()
@@ -89,20 +86,20 @@
 
             class Test {
                 void test() {
-                    if (org.example.ProtoLogCache.TEST_GROUP_enabled) { long protoLogParam0 = 100; double protoLogParam1 = 0.1; String protoLogParam2 = String.valueOf("test"); org.example.ProtoLogImpl.w(TEST_GROUP, 1780316587, 9, "test %d %f " + "abc %s\n test", protoLogParam0, protoLogParam1, protoLogParam2); 
+                    { long protoLogParam0 = 100; double protoLogParam1 = 0.1; String protoLogParam2 = String.valueOf("test"); org.example.ProtoLogImpl.w(TEST_GROUP, -4447034859795564700L, 9, "test %d %f " + "abc %s\n test", protoLogParam0, protoLogParam1, protoLogParam2); 
             
             }
                 }
             }
             """.trimIndent()
 
-        private val TRANSFORMED_CODE_MULTICALL_TEXT_ENABLED = """
+        private val TRANSFORMED_CODE_MULTICALL_TEXT = """
             package org.example;
 
             class Test {
                 void test() {
-                    if (org.example.ProtoLogCache.TEST_GROUP_enabled) { long protoLogParam0 = 100; double protoLogParam1 = 0.1; org.example.ProtoLogImpl.w(TEST_GROUP, 1698911065, 9, "test %d %f", protoLogParam0, protoLogParam1); } /* ProtoLog.w(TEST_GROUP, "test %d %f", 100, 0.1); */ if (org.example.ProtoLogCache.TEST_GROUP_enabled) { long protoLogParam0 = 100; double protoLogParam1 = 0.1; org.example.ProtoLogImpl.w(TEST_GROUP, 1698911065, 9, "test %d %f", protoLogParam0, protoLogParam1); }
-                    if (org.example.ProtoLogCache.TEST_GROUP_enabled) { long protoLogParam0 = 100; double protoLogParam1 = 0.1; org.example.ProtoLogImpl.w(TEST_GROUP, 1698911065, 9, "test %d %f", protoLogParam0, protoLogParam1); }
+                    { long protoLogParam0 = 100; double protoLogParam1 = 0.1; org.example.ProtoLogImpl.w(TEST_GROUP, -1473209266730422156L, 9, "test %d %f", protoLogParam0, protoLogParam1); } /* ProtoLog.w(TEST_GROUP, "test %d %f", 100, 0.1); */ { long protoLogParam0 = 100; double protoLogParam1 = 0.1; org.example.ProtoLogImpl.w(TEST_GROUP, -1473209266730422156L, 9, "test %d %f", protoLogParam0, protoLogParam1); }
+                    { long protoLogParam0 = 100; double protoLogParam1 = 0.1; org.example.ProtoLogImpl.w(TEST_GROUP, -1473209266730422156L, 9, "test %d %f", protoLogParam0, protoLogParam1); }
                 }
             }
             """.trimIndent()
@@ -112,7 +109,7 @@
 
             class Test {
                 void test() {
-                    if (org.example.ProtoLogCache.TEST_GROUP_enabled) { org.example.ProtoLogImpl.w(TEST_GROUP, -1741986185, 0, "test", (Object[]) null); }
+                    { org.example.ProtoLogImpl.w(TEST_GROUP, 3218600869538902408L, 0, "test", (Object[]) null); }
                 }
             }
             """.trimIndent()
@@ -122,7 +119,7 @@
 
             class Test {
                 void test() {
-                    if (org.example.ProtoLogCache.TEST_GROUP_enabled) { long protoLogParam0 = 100; double protoLogParam1 = 0.1; org.example.ProtoLogImpl.w(TEST_GROUP, 1698911065, 9, null, protoLogParam0, protoLogParam1); }
+                    { long protoLogParam0 = 100; double protoLogParam1 = 0.1; org.example.ProtoLogImpl.w(TEST_GROUP, -1473209266730422156L, 9, null, protoLogParam0, protoLogParam1); }
                 }
             }
             """.trimIndent()
@@ -132,43 +129,19 @@
 
             class Test {
                 void test() {
-                    if (org.example.ProtoLogCache.TEST_GROUP_enabled) { long protoLogParam0 = 100; double protoLogParam1 = 0.1; String protoLogParam2 = String.valueOf("test"); org.example.ProtoLogImpl.w(TEST_GROUP, 1780316587, 9, null, protoLogParam0, protoLogParam1, protoLogParam2); 
+                    { long protoLogParam0 = 100; double protoLogParam1 = 0.1; String protoLogParam2 = String.valueOf("test"); org.example.ProtoLogImpl.w(TEST_GROUP, -4447034859795564700L, 9, null, protoLogParam0, protoLogParam1, protoLogParam2); 
             
             }
                 }
             }
             """.trimIndent()
 
-        private val TRANSFORMED_CODE_DISABLED = """
-            package org.example;
-
-            class Test {
-                void test() {
-                    if (false) { /* TEST_GROUP is disabled */ ProtoLog.w(TEST_GROUP, "test %d %f", 100, 0.1); }
-                }
-            }
-            """.trimIndent()
-
-        private val TRANSFORMED_CODE_MULTILINE_DISABLED = """
-            package org.example;
-
-            class Test {
-                void test() {
-                    if (false) { /* TEST_GROUP is disabled */ ProtoLog.w(TEST_GROUP, "test %d %f " + "abc %s\n test", 100, 0.1, "test"); 
-            
-            }
-                }
-            }
-            """.trimIndent()
-        /* ktlint-enable max-line-length */
-
         private const val PATH = "com.example.Test.java"
     }
 
     private val processor: ProtoLogCallProcessor = Mockito.mock(ProtoLogCallProcessor::class.java)
     private val implName = "org.example.ProtoLogImpl"
-    private val cacheName = "org.example.ProtoLogCache"
-    private val sourceJarWriter = SourceTransformer(implName, cacheName, processor)
+    private val sourceJarWriter = SourceTransformer(implName, processor)
 
     private fun <T> any(type: Class<T>): T = Mockito.any<T>(type)
 
@@ -176,9 +149,12 @@
     fun processClass_textEnabled() {
         var code = StaticJavaParser.parse(TEST_CODE)
 
-        Mockito.`when`(processor.process(any(CompilationUnit::class.java),
-                any(ProtoLogCallVisitor::class.java), any(String::class.java)))
-                .thenAnswer { invocation ->
+        Mockito.`when`(processor.process(
+            any(CompilationUnit::class.java),
+            any(ProtoLogCallVisitor::class.java),
+            any(MethodCallVisitor::class.java),
+            any(String::class.java))
+        ).thenAnswer { invocation ->
             val visitor = invocation.arguments[1] as ProtoLogCallVisitor
 
             visitor.processCall(code.findAll(MethodCallExpr::class.java)[0], "test %d %f",
@@ -190,18 +166,15 @@
         val out = sourceJarWriter.processClass(TEST_CODE, PATH, PATH, code)
         code = StaticJavaParser.parse(out)
 
-        val ifStmts = code.findAll(IfStmt::class.java)
-        assertEquals(1, ifStmts.size)
-        val ifStmt = ifStmts[0]
-        assertEquals("$cacheName.TEST_GROUP_enabled", ifStmt.condition.toString())
-        assertFalse(ifStmt.elseStmt.isPresent)
-        assertEquals(3, ifStmt.thenStmt.childNodes.size)
-        val methodCall = ifStmt.thenStmt.findAll(MethodCallExpr::class.java)[0] as MethodCallExpr
-        assertEquals(PROTO_LOG_IMPL_PATH, methodCall.scope.get().toString())
+        val protoLogCalls = code.findAll(MethodCallExpr::class.java).filter {
+            it.scope.orElse(null)?.toString() == implName
+        }
+        Truth.assertThat(protoLogCalls).hasSize(1)
+        val methodCall = protoLogCalls[0] as MethodCallExpr
         assertEquals("w", methodCall.name.asString())
         assertEquals(6, methodCall.arguments.size)
         assertEquals("TEST_GROUP", methodCall.arguments[0].toString())
-        assertEquals("1698911065", methodCall.arguments[1].toString())
+        assertEquals("-1473209266730422156L", methodCall.arguments[1].toString())
         assertEquals(0b1001.toString(), methodCall.arguments[2].toString())
         assertEquals("\"test %d %f\"", methodCall.arguments[3].toString())
         assertEquals("protoLogParam0", methodCall.arguments[4].toString())
@@ -213,9 +186,12 @@
     fun processClass_textEnabledMulticalls() {
         var code = StaticJavaParser.parse(TEST_CODE_MULTICALLS)
 
-        Mockito.`when`(processor.process(any(CompilationUnit::class.java),
-                any(ProtoLogCallVisitor::class.java), any(String::class.java)))
-                .thenAnswer { invocation ->
+        Mockito.`when`(processor.process(
+            any(CompilationUnit::class.java),
+            any(ProtoLogCallVisitor::class.java),
+            any(MethodCallVisitor::class.java),
+            any(String::class.java))
+        ).thenAnswer { invocation ->
             val visitor = invocation.arguments[1] as ProtoLogCallVisitor
 
             val calls = code.findAll(MethodCallExpr::class.java)
@@ -232,32 +208,32 @@
         val out = sourceJarWriter.processClass(TEST_CODE_MULTICALLS, PATH, PATH, code)
         code = StaticJavaParser.parse(out)
 
-        val ifStmts = code.findAll(IfStmt::class.java)
-        assertEquals(3, ifStmts.size)
-        val ifStmt = ifStmts[1]
-        assertEquals("$cacheName.TEST_GROUP_enabled", ifStmt.condition.toString())
-        assertFalse(ifStmt.elseStmt.isPresent)
-        assertEquals(3, ifStmt.thenStmt.childNodes.size)
-        val methodCall = ifStmt.thenStmt.findAll(MethodCallExpr::class.java)[0] as MethodCallExpr
-        assertEquals(PROTO_LOG_IMPL_PATH, methodCall.scope.get().toString())
+        val protoLogCalls = code.findAll(MethodCallExpr::class.java).filter {
+            it.scope.orElse(null)?.toString() == implName
+        }
+        Truth.assertThat(protoLogCalls).hasSize(3)
+        val methodCall = protoLogCalls[0] as MethodCallExpr
         assertEquals("w", methodCall.name.asString())
         assertEquals(6, methodCall.arguments.size)
         assertEquals("TEST_GROUP", methodCall.arguments[0].toString())
-        assertEquals("1698911065", methodCall.arguments[1].toString())
+        assertEquals("-1473209266730422156L", methodCall.arguments[1].toString())
         assertEquals(0b1001.toString(), methodCall.arguments[2].toString())
         assertEquals("\"test %d %f\"", methodCall.arguments[3].toString())
         assertEquals("protoLogParam0", methodCall.arguments[4].toString())
         assertEquals("protoLogParam1", methodCall.arguments[5].toString())
-        assertEquals(TRANSFORMED_CODE_MULTICALL_TEXT_ENABLED, out)
+        assertEquals(TRANSFORMED_CODE_MULTICALL_TEXT, out)
     }
 
     @Test
     fun processClass_textEnabledMultiline() {
         var code = StaticJavaParser.parse(TEST_CODE_MULTILINE)
 
-        Mockito.`when`(processor.process(any(CompilationUnit::class.java),
-                any(ProtoLogCallVisitor::class.java), any(String::class.java)))
-                .thenAnswer { invocation ->
+        Mockito.`when`(processor.process(
+            any(CompilationUnit::class.java),
+            any(ProtoLogCallVisitor::class.java),
+            any(MethodCallVisitor::class.java),
+            any(String::class.java))
+        ).thenAnswer { invocation ->
             val visitor = invocation.arguments[1] as ProtoLogCallVisitor
 
             visitor.processCall(code.findAll(MethodCallExpr::class.java)[0],
@@ -270,18 +246,15 @@
         val out = sourceJarWriter.processClass(TEST_CODE_MULTILINE, PATH, PATH, code)
         code = StaticJavaParser.parse(out)
 
-        val ifStmts = code.findAll(IfStmt::class.java)
-        assertEquals(1, ifStmts.size)
-        val ifStmt = ifStmts[0]
-        assertEquals("$cacheName.TEST_GROUP_enabled", ifStmt.condition.toString())
-        assertFalse(ifStmt.elseStmt.isPresent)
-        assertEquals(4, ifStmt.thenStmt.childNodes.size)
-        val methodCall = ifStmt.thenStmt.findAll(MethodCallExpr::class.java)[1] as MethodCallExpr
-        assertEquals(PROTO_LOG_IMPL_PATH, methodCall.scope.get().toString())
+        val protoLogCalls = code.findAll(MethodCallExpr::class.java).filter {
+            it.scope.orElse(null)?.toString() == implName
+        }
+        Truth.assertThat(protoLogCalls).hasSize(1)
+        val methodCall = protoLogCalls[0] as MethodCallExpr
         assertEquals("w", methodCall.name.asString())
         assertEquals(7, methodCall.arguments.size)
         assertEquals("TEST_GROUP", methodCall.arguments[0].toString())
-        assertEquals("1780316587", methodCall.arguments[1].toString())
+        assertEquals("-4447034859795564700L", methodCall.arguments[1].toString())
         assertEquals(0b001001.toString(), methodCall.arguments[2].toString())
         assertEquals("protoLogParam0", methodCall.arguments[4].toString())
         assertEquals("protoLogParam1", methodCall.arguments[5].toString())
@@ -293,9 +266,12 @@
     fun processClass_noParams() {
         var code = StaticJavaParser.parse(TEST_CODE_NO_PARAMS)
 
-        Mockito.`when`(processor.process(any(CompilationUnit::class.java),
-                any(ProtoLogCallVisitor::class.java), any(String::class.java)))
-                .thenAnswer { invocation ->
+        Mockito.`when`(processor.process(
+            any(CompilationUnit::class.java),
+            any(ProtoLogCallVisitor::class.java),
+            any(MethodCallVisitor::class.java),
+            any(String::class.java))
+        ).thenAnswer { invocation ->
             val visitor = invocation.arguments[1] as ProtoLogCallVisitor
 
             visitor.processCall(code.findAll(MethodCallExpr::class.java)[0], "test",
@@ -307,18 +283,15 @@
         val out = sourceJarWriter.processClass(TEST_CODE_NO_PARAMS, PATH, PATH, code)
         code = StaticJavaParser.parse(out)
 
-        val ifStmts = code.findAll(IfStmt::class.java)
-        assertEquals(1, ifStmts.size)
-        val ifStmt = ifStmts[0]
-        assertEquals("$cacheName.TEST_GROUP_enabled", ifStmt.condition.toString())
-        assertFalse(ifStmt.elseStmt.isPresent)
-        assertEquals(1, ifStmt.thenStmt.childNodes.size)
-        val methodCall = ifStmt.thenStmt.findAll(MethodCallExpr::class.java)[0] as MethodCallExpr
-        assertEquals(PROTO_LOG_IMPL_PATH, methodCall.scope.get().toString())
+        val protoLogCalls = code.findAll(MethodCallExpr::class.java).filter {
+            it.scope.orElse(null)?.toString() == implName
+        }
+        Truth.assertThat(protoLogCalls).hasSize(1)
+        val methodCall = protoLogCalls[0] as MethodCallExpr
         assertEquals("w", methodCall.name.asString())
         assertEquals(5, methodCall.arguments.size)
         assertEquals("TEST_GROUP", methodCall.arguments[0].toString())
-        assertEquals("-1741986185", methodCall.arguments[1].toString())
+        assertEquals("3218600869538902408L", methodCall.arguments[1].toString())
         assertEquals(0.toString(), methodCall.arguments[2].toString())
         assertEquals(TRANSFORMED_CODE_NO_PARAMS, out)
     }
@@ -327,9 +300,12 @@
     fun processClass_textDisabled() {
         var code = StaticJavaParser.parse(TEST_CODE)
 
-        Mockito.`when`(processor.process(any(CompilationUnit::class.java),
-                any(ProtoLogCallVisitor::class.java), any(String::class.java)))
-                .thenAnswer { invocation ->
+        Mockito.`when`(processor.process(
+            any(CompilationUnit::class.java),
+            any(ProtoLogCallVisitor::class.java),
+            any(MethodCallVisitor::class.java),
+            any(String::class.java))
+        ).thenAnswer { invocation ->
             val visitor = invocation.arguments[1] as ProtoLogCallVisitor
 
             visitor.processCall(code.findAll(MethodCallExpr::class.java)[0], "test %d %f",
@@ -341,18 +317,15 @@
         val out = sourceJarWriter.processClass(TEST_CODE, PATH, PATH, code)
         code = StaticJavaParser.parse(out)
 
-        val ifStmts = code.findAll(IfStmt::class.java)
-        assertEquals(1, ifStmts.size)
-        val ifStmt = ifStmts[0]
-        assertEquals("$cacheName.TEST_GROUP_enabled", ifStmt.condition.toString())
-        assertFalse(ifStmt.elseStmt.isPresent)
-        assertEquals(3, ifStmt.thenStmt.childNodes.size)
-        val methodCall = ifStmt.thenStmt.findAll(MethodCallExpr::class.java)[0] as MethodCallExpr
-        assertEquals(PROTO_LOG_IMPL_PATH, methodCall.scope.get().toString())
+        val protoLogCalls = code.findAll(MethodCallExpr::class.java).filter {
+            it.scope.orElse(null)?.toString() == implName
+        }
+        Truth.assertThat(protoLogCalls).hasSize(1)
+        val methodCall = protoLogCalls[0] as MethodCallExpr
         assertEquals("w", methodCall.name.asString())
         assertEquals(6, methodCall.arguments.size)
         assertEquals("TEST_GROUP", methodCall.arguments[0].toString())
-        assertEquals("1698911065", methodCall.arguments[1].toString())
+        assertEquals("-1473209266730422156L", methodCall.arguments[1].toString())
         assertEquals(0b1001.toString(), methodCall.arguments[2].toString())
         assertEquals("null", methodCall.arguments[3].toString())
         assertEquals("protoLogParam0", methodCall.arguments[4].toString())
@@ -364,9 +337,12 @@
     fun processClass_textDisabledMultiline() {
         var code = StaticJavaParser.parse(TEST_CODE_MULTILINE)
 
-        Mockito.`when`(processor.process(any(CompilationUnit::class.java),
-                any(ProtoLogCallVisitor::class.java), any(String::class.java)))
-                .thenAnswer { invocation ->
+        Mockito.`when`(processor.process(
+            any(CompilationUnit::class.java),
+            any(ProtoLogCallVisitor::class.java),
+            any(MethodCallVisitor::class.java),
+            any(String::class.java))
+        ).thenAnswer { invocation ->
             val visitor = invocation.arguments[1] as ProtoLogCallVisitor
 
             visitor.processCall(code.findAll(MethodCallExpr::class.java)[0],
@@ -379,18 +355,15 @@
         val out = sourceJarWriter.processClass(TEST_CODE_MULTILINE, PATH, PATH, code)
         code = StaticJavaParser.parse(out)
 
-        val ifStmts = code.findAll(IfStmt::class.java)
-        assertEquals(1, ifStmts.size)
-        val ifStmt = ifStmts[0]
-        assertEquals("$cacheName.TEST_GROUP_enabled", ifStmt.condition.toString())
-        assertFalse(ifStmt.elseStmt.isPresent)
-        assertEquals(4, ifStmt.thenStmt.childNodes.size)
-        val methodCall = ifStmt.thenStmt.findAll(MethodCallExpr::class.java)[1] as MethodCallExpr
-        assertEquals(PROTO_LOG_IMPL_PATH, methodCall.scope.get().toString())
+        val protoLogCalls = code.findAll(MethodCallExpr::class.java).filter {
+            it.scope.orElse(null)?.toString() == implName
+        }
+        Truth.assertThat(protoLogCalls).hasSize(1)
+        val methodCall = protoLogCalls[0] as MethodCallExpr
         assertEquals("w", methodCall.name.asString())
         assertEquals(7, methodCall.arguments.size)
         assertEquals("TEST_GROUP", methodCall.arguments[0].toString())
-        assertEquals("1780316587", methodCall.arguments[1].toString())
+        assertEquals("-4447034859795564700L", methodCall.arguments[1].toString())
         assertEquals(0b001001.toString(), methodCall.arguments[2].toString())
         assertEquals("null", methodCall.arguments[3].toString())
         assertEquals("protoLogParam0", methodCall.arguments[4].toString())
@@ -398,55 +371,4 @@
         assertEquals("protoLogParam2", methodCall.arguments[6].toString())
         assertEquals(TRANSFORMED_CODE_MULTILINE_TEXT_DISABLED, out)
     }
-
-    @Test
-    fun processClass_disabled() {
-        var code = StaticJavaParser.parse(TEST_CODE)
-
-        Mockito.`when`(processor.process(any(CompilationUnit::class.java),
-                any(ProtoLogCallVisitor::class.java), any(String::class.java)))
-                .thenAnswer { invocation ->
-            val visitor = invocation.arguments[1] as ProtoLogCallVisitor
-
-            visitor.processCall(code.findAll(MethodCallExpr::class.java)[0], "test %d %f",
-                    LogLevel.WARN, LogGroup("TEST_GROUP", false, true, "WM_TEST"))
-
-            invocation.arguments[0] as CompilationUnit
-        }
-
-        val out = sourceJarWriter.processClass(TEST_CODE, PATH, PATH, code)
-        code = StaticJavaParser.parse(out)
-
-        val ifStmts = code.findAll(IfStmt::class.java)
-        assertEquals(1, ifStmts.size)
-        val ifStmt = ifStmts[0]
-        assertEquals("false", ifStmt.condition.toString())
-        assertEquals(TRANSFORMED_CODE_DISABLED, out)
-    }
-
-    @Test
-    fun processClass_disabledMultiline() {
-        var code = StaticJavaParser.parse(TEST_CODE_MULTILINE)
-
-        Mockito.`when`(processor.process(any(CompilationUnit::class.java),
-                any(ProtoLogCallVisitor::class.java), any(String::class.java)))
-                .thenAnswer { invocation ->
-            val visitor = invocation.arguments[1] as ProtoLogCallVisitor
-
-            visitor.processCall(code.findAll(MethodCallExpr::class.java)[0],
-                    "test %d %f abc %s\n test", LogLevel.WARN, LogGroup("TEST_GROUP",
-                    false, true, "WM_TEST"))
-
-            invocation.arguments[0] as CompilationUnit
-        }
-
-        val out = sourceJarWriter.processClass(TEST_CODE_MULTILINE, PATH, PATH, code)
-        code = StaticJavaParser.parse(out)
-
-        val ifStmts = code.findAll(IfStmt::class.java)
-        assertEquals(1, ifStmts.size)
-        val ifStmt = ifStmts[0]
-        assertEquals("false", ifStmt.condition.toString())
-        assertEquals(TRANSFORMED_CODE_MULTILINE_DISABLED, out)
-    }
 }
diff --git a/tools/protologtool/tests/com/android/protolog/tool/ViewerConfigBuilderTest.kt b/tools/protologtool/tests/com/android/protolog/tool/ViewerConfigJsonBuilderTest.kt
similarity index 66%
rename from tools/protologtool/tests/com/android/protolog/tool/ViewerConfigBuilderTest.kt
rename to tools/protologtool/tests/com/android/protolog/tool/ViewerConfigJsonBuilderTest.kt
index 52dce21..d27ae88 100644
--- a/tools/protologtool/tests/com/android/protolog/tool/ViewerConfigBuilderTest.kt
+++ b/tools/protologtool/tests/com/android/protolog/tool/ViewerConfigJsonBuilderTest.kt
@@ -18,13 +18,12 @@
 
 import com.android.internal.protolog.common.LogLevel
 import com.android.json.stream.JsonReader
-import com.android.protolog.tool.ViewerConfigBuilder.LogCall
+import com.android.protolog.tool.ProtoLogTool.LogCall
+import java.io.StringReader
 import org.junit.Assert.assertEquals
 import org.junit.Test
-import org.mockito.Mockito
-import java.io.StringReader
 
-class ViewerConfigBuilderTest {
+class ViewerConfigJsonBuilderTest {
     companion object {
         private val TAG1 = "WM_TEST"
         private val TAG2 = "WM_DEBUG"
@@ -39,20 +38,22 @@
         private const val PATH = "/tmp/test.java"
     }
 
-    private val configBuilder = ViewerConfigBuilder(Mockito.mock(ProtoLogCallProcessor::class.java))
+    private val configBuilder = ViewerConfigJsonBuilder()
 
-    private fun parseConfig(json: String): Map<Int, ViewerConfigParser.ConfigEntry> {
+    private fun parseConfig(json: String): Map<Long, ViewerConfigParser.ConfigEntry> {
         return ViewerConfigParser().parseConfig(JsonReader(StringReader(json)))
     }
 
     @Test
     fun processClass() {
-        configBuilder.addLogCalls(listOf(
+        val logCallRegistry = ProtoLogTool.LogCallRegistry()
+        logCallRegistry.addLogCalls(listOf(
                 LogCall(TEST1.messageString, LogLevel.INFO, GROUP1, PATH),
                 LogCall(TEST2.messageString, LogLevel.DEBUG, GROUP2, PATH),
-                LogCall(TEST3.messageString, LogLevel.ERROR, GROUP3, PATH)).withContext())
+                LogCall(TEST3.messageString, LogLevel.ERROR, GROUP3, PATH)))
 
-        val parsedConfig = parseConfig(configBuilder.build())
+        val parsedConfig = parseConfig(
+            configBuilder.build(logCallRegistry.getStatements()).toString(Charsets.UTF_8))
         assertEquals(3, parsedConfig.size)
         assertEquals(TEST1, parsedConfig[CodeUtils.hash(PATH,
 	           TEST1.messageString, LogLevel.INFO, GROUP1)])
@@ -64,32 +65,16 @@
 
     @Test
     fun processClass_nonUnique() {
-        configBuilder.addLogCalls(listOf(
+        val logCallRegistry = ProtoLogTool.LogCallRegistry()
+        logCallRegistry.addLogCalls(listOf(
                 LogCall(TEST1.messageString, LogLevel.INFO, GROUP1, PATH),
                 LogCall(TEST1.messageString, LogLevel.INFO, GROUP1, PATH),
-                LogCall(TEST1.messageString, LogLevel.INFO, GROUP1, PATH)).withContext())
+                LogCall(TEST1.messageString, LogLevel.INFO, GROUP1, PATH)))
 
-        val parsedConfig = parseConfig(configBuilder.build())
+        val parsedConfig = parseConfig(
+            configBuilder.build(logCallRegistry.getStatements()).toString(Charsets.UTF_8))
         assertEquals(1, parsedConfig.size)
         assertEquals(TEST1, parsedConfig[CodeUtils.hash(PATH, TEST1.messageString,
-            	   LogLevel.INFO, GROUP1)])
+            LogLevel.INFO, GROUP1)])
     }
-
-    @Test
-    fun processClass_disabled() {
-        configBuilder.addLogCalls(listOf(
-                LogCall(TEST1.messageString, LogLevel.INFO, GROUP1, PATH),
-                LogCall(TEST2.messageString, LogLevel.DEBUG, GROUP_DISABLED, PATH),
-                LogCall(TEST3.messageString, LogLevel.ERROR, GROUP_TEXT_DISABLED, PATH))
-                .withContext())
-
-        val parsedConfig = parseConfig(configBuilder.build())
-        assertEquals(2, parsedConfig.size)
-        assertEquals(TEST1, parsedConfig[CodeUtils.hash(
-                PATH, TEST1.messageString, LogLevel.INFO, GROUP1)])
-        assertEquals(TEST3, parsedConfig[CodeUtils.hash(
-                PATH, TEST3.messageString, LogLevel.ERROR, GROUP_TEXT_DISABLED)])
-    }
-
-    private fun List<LogCall>.withContext() = map { it to ParsingContext() }
 }