Merge changes Id2cf232d,I54b18bd9 into main

* changes:
  Do not create new LayerTracing instance within LayerTraceGenerator
  Change log level of key tracing events
diff --git a/services/surfaceflinger/Tracing/LayerDataSource.cpp b/services/surfaceflinger/Tracing/LayerDataSource.cpp
index 474fef8..25e768e 100644
--- a/services/surfaceflinger/Tracing/LayerDataSource.cpp
+++ b/services/surfaceflinger/Tracing/LayerDataSource.cpp
@@ -52,7 +52,7 @@
         mMode = static_cast<LayerTracing::Mode>(config.mode());
     } else {
         mMode = LayerTracing::Mode::MODE_GENERATED;
-        ALOGV("Received config with unspecified 'mode'. Using 'GENERATED' as default");
+        ALOGD("Received config with unspecified 'mode'. Using 'GENERATED' as default");
     }
 
     mFlags = 0;
@@ -62,21 +62,21 @@
 }
 
 void LayerDataSource::OnStart(const LayerDataSource::StartArgs&) {
-    ALOGV("Received OnStart event (mode = 0x%02x, flags = 0x%02x)", mMode, mFlags);
+    ALOGD("Received OnStart event (mode = 0x%02x, flags = 0x%02x)", mMode, mFlags);
     if (auto* p = mLayerTracing.load()) {
         p->onStart(mMode, mFlags);
     }
 }
 
 void LayerDataSource::OnFlush(const LayerDataSource::FlushArgs&) {
-    ALOGV("Received OnFlush event (mode = 0x%02x, flags = 0x%02x)", mMode, mFlags);
+    ALOGD("Received OnFlush event (mode = 0x%02x, flags = 0x%02x)", mMode, mFlags);
     if (auto* p = mLayerTracing.load()) {
         p->onFlush(mMode, mFlags);
     }
 }
 
 void LayerDataSource::OnStop(const LayerDataSource::StopArgs&) {
-    ALOGV("Received OnStop event (mode = 0x%02x, flags = 0x%02x)", mMode, mFlags);
+    ALOGD("Received OnStop event (mode = 0x%02x, flags = 0x%02x)", mMode, mFlags);
     if (auto* p = mLayerTracing.load()) {
         p->onStop(mMode);
     }
diff --git a/services/surfaceflinger/Tracing/LayerTracing.cpp b/services/surfaceflinger/Tracing/LayerTracing.cpp
index e55b4c2..403e105 100644
--- a/services/surfaceflinger/Tracing/LayerTracing.cpp
+++ b/services/surfaceflinger/Tracing/LayerTracing.cpp
@@ -36,6 +36,10 @@
     LayerDataSource::Initialize(*this);
 }
 
+LayerTracing::LayerTracing(std::ostream& outStream) : LayerTracing() {
+    mOutStream = std::ref(outStream);
+}
+
 LayerTracing::~LayerTracing() {
     LayerDataSource::UnregisterLayerTracing();
 }
@@ -49,10 +53,6 @@
     mTransactionTracing = &transactionTracing;
 }
 
-void LayerTracing::setOutputStream(std::ostream& outStream) {
-    mOutStream = std::ref(outStream);
-}
-
 void LayerTracing::onStart(Mode mode, uint32_t flags) {
     switch (mode) {
         case Mode::MODE_ACTIVE: {
@@ -63,18 +63,17 @@
             // taken. Let's manually take a snapshot, so that the trace's first entry will contain
             // the current layers state.
             addProtoSnapshotToOstream(mTakeLayersSnapshotProto(flags), Mode::MODE_ACTIVE);
-            ALOGV("Started active tracing (traced initial snapshot)");
+            ALOGD("Started active tracing (traced initial snapshot)");
             break;
         }
         case Mode::MODE_GENERATED: {
-            ALOGV("Started generated tracing (waiting for OnFlush event to generated layers)");
+            ALOGD("Started generated tracing (waiting for OnFlush event to generated layers)");
             break;
         }
         case Mode::MODE_DUMP: {
-            ALOGV("Starting dump tracing (dumping single snapshot)");
             auto snapshot = mTakeLayersSnapshotProto(flags);
             addProtoSnapshotToOstream(std::move(snapshot), Mode::MODE_DUMP);
-            ALOGV("Started dump tracing (dumped single snapshot)");
+            ALOGD("Started dump tracing (dumped single snapshot)");
             break;
         }
         default: {
@@ -91,19 +90,19 @@
     }
 
     if (!mTransactionTracing) {
-        ALOGV("Skipping layers trace generation (transactions tracing disabled)");
+        ALOGD("Skipping layers trace generation (transactions tracing disabled)");
         return;
     }
 
     auto transactionTrace = mTransactionTracing->writeToProto();
-    LayerTraceGenerator{}.generate(transactionTrace, flags);
-    ALOGV("Flushed generated tracing");
+    LayerTraceGenerator{}.generate(transactionTrace, flags, *this);
+    ALOGD("Flushed generated tracing");
 }
 
 void LayerTracing::onStop(Mode mode) {
     if (mode == Mode::MODE_ACTIVE) {
         mIsActiveTracingStarted.store(false);
-        ALOGV("Stopped active tracing");
+        ALOGD("Stopped active tracing");
     }
 }
 
diff --git a/services/surfaceflinger/Tracing/LayerTracing.h b/services/surfaceflinger/Tracing/LayerTracing.h
index 349cc40..fe7f06d 100644
--- a/services/surfaceflinger/Tracing/LayerTracing.h
+++ b/services/surfaceflinger/Tracing/LayerTracing.h
@@ -97,11 +97,11 @@
     };
 
     LayerTracing();
+    LayerTracing(std::ostream&);
     ~LayerTracing();
     void setTakeLayersSnapshotProtoFunction(
             const std::function<perfetto::protos::LayersSnapshotProto(uint32_t)>&);
     void setTransactionTracing(TransactionTracing&);
-    void setOutputStream(std::ostream&);
 
     // Start event from perfetto data source
     void onStart(Mode mode, uint32_t flags);
diff --git a/services/surfaceflinger/Tracing/TransactionDataSource.cpp b/services/surfaceflinger/Tracing/TransactionDataSource.cpp
index 05b89b8..6c9ed30 100644
--- a/services/surfaceflinger/Tracing/TransactionDataSource.cpp
+++ b/services/surfaceflinger/Tracing/TransactionDataSource.cpp
@@ -49,26 +49,26 @@
         mMode = static_cast<TransactionTracing::Mode>(config.mode());
     } else {
         mMode = TransactionTracing::Mode::MODE_CONTINUOUS;
-        ALOGV("Received config with unspecified 'mode'. Using 'CONTINUOUS' as default");
+        ALOGD("Received config with unspecified 'mode'. Using 'CONTINUOUS' as default");
     }
 }
 
 void TransactionDataSource::OnStart(const StartArgs&) {
-    ALOGV("Received OnStart event");
+    ALOGD("Received OnStart event");
     if (auto* p = mTransactionTracing.load()) {
         p->onStart(mMode);
     }
 }
 
 void TransactionDataSource::OnFlush(const FlushArgs&) {
-    ALOGV("Received OnFlush event");
+    ALOGD("Received OnFlush event");
     if (auto* p = mTransactionTracing.load()) {
         p->onFlush(mMode);
     }
 }
 
 void TransactionDataSource::OnStop(const StopArgs&) {
-    ALOGV("Received OnStop event");
+    ALOGD("Received OnStop event");
 }
 
 TransactionTracing::Mode TransactionDataSource::GetMode() const {
diff --git a/services/surfaceflinger/Tracing/TransactionTracing.cpp b/services/surfaceflinger/Tracing/TransactionTracing.cpp
index 0517984..9d6d87e 100644
--- a/services/surfaceflinger/Tracing/TransactionTracing.cpp
+++ b/services/surfaceflinger/Tracing/TransactionTracing.cpp
@@ -70,7 +70,7 @@
 
     writeRingBufferToPerfetto(TransactionTracing::Mode::MODE_ACTIVE);
 
-    ALOGV("Started active mode tracing (wrote initial transactions ring buffer to perfetto)");
+    ALOGD("Started active mode tracing (wrote initial transactions ring buffer to perfetto)");
 }
 
 void TransactionTracing::onFlush(TransactionTracing::Mode mode) {
@@ -83,7 +83,7 @@
 
     writeRingBufferToPerfetto(TransactionTracing::Mode::MODE_CONTINUOUS);
 
-    ALOGV("Flushed continuous mode tracing (wrote transactions ring buffer to perfetto");
+    ALOGD("Flushed continuous mode tracing (wrote transactions ring buffer to perfetto");
 }
 
 void TransactionTracing::writeRingBufferToPerfetto(TransactionTracing::Mode mode) {
diff --git a/services/surfaceflinger/Tracing/tools/LayerTraceGenerator.cpp b/services/surfaceflinger/Tracing/tools/LayerTraceGenerator.cpp
index 62c362e..23fe8fa 100644
--- a/services/surfaceflinger/Tracing/tools/LayerTraceGenerator.cpp
+++ b/services/surfaceflinger/Tracing/tools/LayerTraceGenerator.cpp
@@ -41,8 +41,7 @@
 using namespace ftl::flag_operators;
 
 bool LayerTraceGenerator::generate(const perfetto::protos::TransactionTraceFile& traceFile,
-                                   std::uint32_t traceFlags,
-                                   std::optional<std::reference_wrapper<std::ostream>> outStream,
+                                   std::uint32_t traceFlags, LayerTracing& layerTracing,
                                    bool onlyLastEntry) {
     if (traceFile.entry_size() == 0) {
         ALOGD("Trace file is empty");
@@ -51,11 +50,6 @@
 
     TransactionProtoParser parser(std::make_unique<TransactionProtoParser::FlingerDataMapper>());
 
-    LayerTracing layerTracing;
-    if (outStream) {
-        layerTracing.setOutputStream(outStream->get());
-    }
-
     // frontend
     frontend::LayerLifecycleManager lifecycleManager;
     frontend::LayerHierarchyBuilder hierarchyBuilder{{}};
diff --git a/services/surfaceflinger/Tracing/tools/LayerTraceGenerator.h b/services/surfaceflinger/Tracing/tools/LayerTraceGenerator.h
index 2bb6f51..e4d02ca 100644
--- a/services/surfaceflinger/Tracing/tools/LayerTraceGenerator.h
+++ b/services/surfaceflinger/Tracing/tools/LayerTraceGenerator.h
@@ -30,7 +30,6 @@
 class LayerTraceGenerator {
 public:
     bool generate(const perfetto::protos::TransactionTraceFile&, std::uint32_t traceFlags,
-                  std::optional<std::reference_wrapper<std::ostream>> outStream = std::nullopt,
-                  bool onlyLastEntry = false);
+                  LayerTracing& layerTracing, bool onlyLastEntry = false);
 };
 } // namespace android
diff --git a/services/surfaceflinger/Tracing/tools/main.cpp b/services/surfaceflinger/Tracing/tools/main.cpp
index a8ac36a..65e8479 100644
--- a/services/surfaceflinger/Tracing/tools/main.cpp
+++ b/services/surfaceflinger/Tracing/tools/main.cpp
@@ -52,6 +52,8 @@
             (argc == 3) ? argv[2] : "/data/misc/wmtrace/layers_trace.winscope";
     auto outStream = std::ofstream{outputLayersTracePath, std::ios::binary | std::ios::app};
 
+    auto layerTracing = LayerTracing{outStream};
+
     const bool generateLastEntryOnly =
             argc >= 4 && std::string_view(argv[3]) == "--last-entry-only";
 
@@ -60,7 +62,7 @@
     ALOGD("Generating %s...", outputLayersTracePath);
     std::cout << "Generating " << outputLayersTracePath << "\n";
 
-    if (!LayerTraceGenerator().generate(transactionTraceFile, traceFlags, outStream,
+    if (!LayerTraceGenerator().generate(transactionTraceFile, traceFlags, layerTracing,
                                         generateLastEntryOnly)) {
         std::cout << "Error: Failed to generate layers trace " << outputLayersTracePath;
         return -1;
diff --git a/services/surfaceflinger/tests/tracing/TransactionTraceTestSuite.cpp b/services/surfaceflinger/tests/tracing/TransactionTraceTestSuite.cpp
index 7a07634..2fcb9e0 100644
--- a/services/surfaceflinger/tests/tracing/TransactionTraceTestSuite.cpp
+++ b/services/surfaceflinger/tests/tracing/TransactionTraceTestSuite.cpp
@@ -23,6 +23,7 @@
 #include <unordered_map>
 
 #include <LayerProtoHelper.h>
+#include <Tracing/LayerTracing.h>
 #include <Tracing/TransactionProtoParser.h>
 #include <Tracing/tools/LayerTraceGenerator.h>
 #include <layerproto/LayerProtoHeader.h>
@@ -62,7 +63,8 @@
         {
             auto traceFlags = LayerTracing::TRACE_INPUT | LayerTracing::TRACE_BUFFERS;
             std::ofstream outStream{actualLayersTracePath, std::ios::binary | std::ios::app};
-            EXPECT_TRUE(LayerTraceGenerator().generate(mTransactionTrace, traceFlags, outStream,
+            auto layerTracing = LayerTracing{outStream};
+            EXPECT_TRUE(LayerTraceGenerator().generate(mTransactionTrace, traceFlags, layerTracing,
                                                        /*onlyLastEntry=*/true))
                     << "Failed to generate layers trace from " << transactionTracePath;
         }