diff --git a/camera/Android.mk b/camera/Android.mk
index e633450..5cedab0 100644
--- a/camera/Android.mk
+++ b/camera/Android.mk
@@ -8,6 +8,7 @@
 	Camera.cpp \
 	CameraMetadata.cpp \
 	CameraParameters.cpp \
+	CameraParameters2.cpp \
 	ICamera.cpp \
 	ICameraClient.cpp \
 	ICameraService.cpp \
diff --git a/camera/CameraParameters2.cpp b/camera/CameraParameters2.cpp
new file mode 100644
index 0000000..eac79e1
--- /dev/null
+++ b/camera/CameraParameters2.cpp
@@ -0,0 +1,381 @@
+/*
+**
+** Copyright 2008, 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.
+*/
+
+#define LOG_TAG "CameraParams2"
+// #define LOG_NDEBUG 0
+#include <utils/Log.h>
+
+#include <string.h>
+#include <stdlib.h>
+#include <camera/CameraParameters2.h>
+
+namespace android {
+
+CameraParameters2::CameraParameters2()
+                : mMap()
+{
+}
+
+CameraParameters2::~CameraParameters2()
+{
+}
+
+String8 CameraParameters2::flatten() const
+{
+    String8 flattened("");
+    size_t size = mMap.size();
+
+    for (size_t i = 0; i < size; i++) {
+        String8 k, v;
+        k = mMap.keyAt(i);
+        v = mMap.valueAt(i);
+
+        flattened += k;
+        flattened += "=";
+        flattened += v;
+        if (i != size-1)
+            flattened += ";";
+    }
+
+    ALOGV("%s: Flattened params = %s", __FUNCTION__, flattened.string());
+
+    return flattened;
+}
+
+void CameraParameters2::unflatten(const String8 &params)
+{
+    const char *a = params.string();
+    const char *b;
+
+    mMap.clear();
+
+    for (;;) {
+        // Find the bounds of the key name.
+        b = strchr(a, '=');
+        if (b == 0)
+            break;
+
+        // Create the key string.
+        String8 k(a, (size_t)(b-a));
+
+        // Find the value.
+        a = b+1;
+        b = strchr(a, ';');
+        if (b == 0) {
+            // If there's no semicolon, this is the last item.
+            String8 v(a);
+            mMap.add(k, v);
+            break;
+        }
+
+        String8 v(a, (size_t)(b-a));
+        mMap.add(k, v);
+        a = b+1;
+    }
+}
+
+
+void CameraParameters2::set(const char *key, const char *value)
+{
+    // XXX i think i can do this with strspn()
+    if (strchr(key, '=') || strchr(key, ';')) {
+        //XXX ALOGE("Key \"%s\"contains invalid character (= or ;)", key);
+        return;
+    }
+
+    if (strchr(value, '=') || strchr(value, ';')) {
+        //XXX ALOGE("Value \"%s\"contains invalid character (= or ;)", value);
+        return;
+    }
+
+    // Replacing a value updates the key's order to be the new largest order
+    ssize_t res = mMap.replaceValueFor(String8(key), String8(value));
+    LOG_ALWAYS_FATAL_IF(res < 0, "replaceValueFor(%s,%s) failed", key, value);
+}
+
+void CameraParameters2::set(const char *key, int value)
+{
+    char str[16];
+    sprintf(str, "%d", value);
+    set(key, str);
+}
+
+void CameraParameters2::setFloat(const char *key, float value)
+{
+    char str[16];  // 14 should be enough. We overestimate to be safe.
+    snprintf(str, sizeof(str), "%g", value);
+    set(key, str);
+}
+
+const char *CameraParameters2::get(const char *key) const
+{
+    ssize_t idx = mMap.indexOfKey(String8(key));
+    if (idx < 0) {
+        return NULL;
+    } else {
+        return mMap.valueAt(idx).string();
+    }
+}
+
+int CameraParameters2::getInt(const char *key) const
+{
+    const char *v = get(key);
+    if (v == 0)
+        return -1;
+    return strtol(v, 0, 0);
+}
+
+float CameraParameters2::getFloat(const char *key) const
+{
+    const char *v = get(key);
+    if (v == 0) return -1;
+    return strtof(v, 0);
+}
+
+status_t CameraParameters2::compareSetOrder(const char *key1, const char *key2,
+        int *order) const {
+    if (key1 == NULL) {
+        ALOGE("%s: key1 must not be NULL", __FUNCTION__);
+        return BAD_VALUE;
+    } else if (key2 == NULL) {
+        ALOGE("%s: key2 must not be NULL", __FUNCTION__);
+        return BAD_VALUE;
+    } else if (order == NULL) {
+        ALOGE("%s: order must not be NULL", __FUNCTION__);
+        return BAD_VALUE;
+    }
+
+    ssize_t index1 = mMap.indexOfKey(String8(key1));
+    ssize_t index2 = mMap.indexOfKey(String8(key2));
+    if (index1 < 0) {
+        ALOGW("%s: Key1 (%s) was not set", __FUNCTION__, key1);
+        return NAME_NOT_FOUND;
+    } else if (index2 < 0) {
+        ALOGW("%s: Key2 (%s) was not set", __FUNCTION__, key2);
+        return NAME_NOT_FOUND;
+    }
+
+    *order = (index1 == index2) ? 0  :
+             (index1 < index2)  ? -1 :
+             1;
+
+    return OK;
+}
+
+void CameraParameters2::remove(const char *key)
+{
+    mMap.removeItem(String8(key));
+}
+
+// Parse string like "640x480" or "10000,20000"
+static int parse_pair(const char *str, int *first, int *second, char delim,
+                      char **endptr = NULL)
+{
+    // Find the first integer.
+    char *end;
+    int w = (int)strtol(str, &end, 10);
+    // If a delimeter does not immediately follow, give up.
+    if (*end != delim) {
+        ALOGE("Cannot find delimeter (%c) in str=%s", delim, str);
+        return -1;
+    }
+
+    // Find the second integer, immediately after the delimeter.
+    int h = (int)strtol(end+1, &end, 10);
+
+    *first = w;
+    *second = h;
+
+    if (endptr) {
+        *endptr = end;
+    }
+
+    return 0;
+}
+
+static void parseSizesList(const char *sizesStr, Vector<Size> &sizes)
+{
+    if (sizesStr == 0) {
+        return;
+    }
+
+    char *sizeStartPtr = (char *)sizesStr;
+
+    while (true) {
+        int width, height;
+        int success = parse_pair(sizeStartPtr, &width, &height, 'x',
+                                 &sizeStartPtr);
+        if (success == -1 || (*sizeStartPtr != ',' && *sizeStartPtr != '\0')) {
+            ALOGE("Picture sizes string \"%s\" contains invalid character.", sizesStr);
+            return;
+        }
+        sizes.push(Size(width, height));
+
+        if (*sizeStartPtr == '\0') {
+            return;
+        }
+        sizeStartPtr++;
+    }
+}
+
+void CameraParameters2::setPreviewSize(int width, int height)
+{
+    char str[32];
+    sprintf(str, "%dx%d", width, height);
+    set(CameraParameters::KEY_PREVIEW_SIZE, str);
+}
+
+void CameraParameters2::getPreviewSize(int *width, int *height) const
+{
+    *width = *height = -1;
+    // Get the current string, if it doesn't exist, leave the -1x-1
+    const char *p = get(CameraParameters::KEY_PREVIEW_SIZE);
+    if (p == 0)  return;
+    parse_pair(p, width, height, 'x');
+}
+
+void CameraParameters2::getPreferredPreviewSizeForVideo(int *width, int *height) const
+{
+    *width = *height = -1;
+    const char *p = get(CameraParameters::KEY_PREFERRED_PREVIEW_SIZE_FOR_VIDEO);
+    if (p == 0)  return;
+    parse_pair(p, width, height, 'x');
+}
+
+void CameraParameters2::getSupportedPreviewSizes(Vector<Size> &sizes) const
+{
+    const char *previewSizesStr = get(CameraParameters::KEY_SUPPORTED_PREVIEW_SIZES);
+    parseSizesList(previewSizesStr, sizes);
+}
+
+void CameraParameters2::setVideoSize(int width, int height)
+{
+    char str[32];
+    sprintf(str, "%dx%d", width, height);
+    set(CameraParameters::KEY_VIDEO_SIZE, str);
+}
+
+void CameraParameters2::getVideoSize(int *width, int *height) const
+{
+    *width = *height = -1;
+    const char *p = get(CameraParameters::KEY_VIDEO_SIZE);
+    if (p == 0) return;
+    parse_pair(p, width, height, 'x');
+}
+
+void CameraParameters2::getSupportedVideoSizes(Vector<Size> &sizes) const
+{
+    const char *videoSizesStr = get(CameraParameters::KEY_SUPPORTED_VIDEO_SIZES);
+    parseSizesList(videoSizesStr, sizes);
+}
+
+void CameraParameters2::setPreviewFrameRate(int fps)
+{
+    set(CameraParameters::KEY_PREVIEW_FRAME_RATE, fps);
+}
+
+int CameraParameters2::getPreviewFrameRate() const
+{
+    return getInt(CameraParameters::KEY_PREVIEW_FRAME_RATE);
+}
+
+void CameraParameters2::getPreviewFpsRange(int *min_fps, int *max_fps) const
+{
+    *min_fps = *max_fps = -1;
+    const char *p = get(CameraParameters::KEY_PREVIEW_FPS_RANGE);
+    if (p == 0) return;
+    parse_pair(p, min_fps, max_fps, ',');
+}
+
+void CameraParameters2::setPreviewFpsRange(int min_fps, int max_fps)
+{
+    String8 str = String8::format("%d,%d", min_fps, max_fps);
+    set(CameraParameters::KEY_PREVIEW_FPS_RANGE, str.string());
+}
+
+void CameraParameters2::setPreviewFormat(const char *format)
+{
+    set(CameraParameters::KEY_PREVIEW_FORMAT, format);
+}
+
+const char *CameraParameters2::getPreviewFormat() const
+{
+    return get(CameraParameters::KEY_PREVIEW_FORMAT);
+}
+
+void CameraParameters2::setPictureSize(int width, int height)
+{
+    char str[32];
+    sprintf(str, "%dx%d", width, height);
+    set(CameraParameters::KEY_PICTURE_SIZE, str);
+}
+
+void CameraParameters2::getPictureSize(int *width, int *height) const
+{
+    *width = *height = -1;
+    // Get the current string, if it doesn't exist, leave the -1x-1
+    const char *p = get(CameraParameters::KEY_PICTURE_SIZE);
+    if (p == 0) return;
+    parse_pair(p, width, height, 'x');
+}
+
+void CameraParameters2::getSupportedPictureSizes(Vector<Size> &sizes) const
+{
+    const char *pictureSizesStr = get(CameraParameters::KEY_SUPPORTED_PICTURE_SIZES);
+    parseSizesList(pictureSizesStr, sizes);
+}
+
+void CameraParameters2::setPictureFormat(const char *format)
+{
+    set(CameraParameters::KEY_PICTURE_FORMAT, format);
+}
+
+const char *CameraParameters2::getPictureFormat() const
+{
+    return get(CameraParameters::KEY_PICTURE_FORMAT);
+}
+
+void CameraParameters2::dump() const
+{
+    ALOGD("dump: mMap.size = %d", mMap.size());
+    for (size_t i = 0; i < mMap.size(); i++) {
+        String8 k, v;
+        k = mMap.keyAt(i);
+        v = mMap.valueAt(i);
+        ALOGD("%s: %s\n", k.string(), v.string());
+    }
+}
+
+status_t CameraParameters2::dump(int fd, const Vector<String16>& args) const
+{
+    const size_t SIZE = 256;
+    char buffer[SIZE];
+    String8 result;
+    snprintf(buffer, 255, "CameraParameters2::dump: mMap.size = %zu\n", mMap.size());
+    result.append(buffer);
+    for (size_t i = 0; i < mMap.size(); i++) {
+        String8 k, v;
+        k = mMap.keyAt(i);
+        v = mMap.valueAt(i);
+        snprintf(buffer, 255, "\t%s: %s\n", k.string(), v.string());
+        result.append(buffer);
+    }
+    write(fd, result.string(), result.size());
+    return NO_ERROR;
+}
+
+}; // namespace android
diff --git a/include/camera/CameraParameters2.h b/include/camera/CameraParameters2.h
new file mode 100644
index 0000000..88ad812
--- /dev/null
+++ b/include/camera/CameraParameters2.h
@@ -0,0 +1,203 @@
+/*
+ * Copyright (C) 2014 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.
+ */
+
+#ifndef ANDROID_HARDWARE_CAMERA_PARAMETERS2_H
+#define ANDROID_HARDWARE_CAMERA_PARAMETERS2_H
+
+#include <utils/Vector.h>
+#include <utils/String8.h>
+#include "CameraParameters.h"
+
+namespace android {
+
+/**
+ * A copy of CameraParameters plus ABI-breaking changes. Needed
+ * because some camera HALs directly link to CameraParameters and cannot
+ * tolerate an ABI change.
+ */
+class CameraParameters2
+{
+public:
+    CameraParameters2();
+    CameraParameters2(const String8 &params) { unflatten(params); }
+    ~CameraParameters2();
+
+    String8 flatten() const;
+    void unflatten(const String8 &params);
+
+    void set(const char *key, const char *value);
+    void set(const char *key, int value);
+    void setFloat(const char *key, float value);
+    // Look up string value by key.
+    // -- The string remains valid until the next set/remove of the same key,
+    //    or until the map gets cleared.
+    const char *get(const char *key) const;
+    int getInt(const char *key) const;
+    float getFloat(const char *key) const;
+
+    // Compare the order that key1 was set vs the order that key2 was set.
+    //
+    // Sets the order parameter to an integer less than, equal to, or greater
+    // than zero if key1's set order was respectively, to be less than, to
+    // match, or to be greater than key2's set order.
+    //
+    // Error codes:
+    //  * NAME_NOT_FOUND - if either key has not been set previously
+    //  * BAD_VALUE - if any of the parameters are NULL
+    status_t compareSetOrder(const char *key1, const char *key2,
+            /*out*/
+            int *order) const;
+
+    void remove(const char *key);
+
+    void setPreviewSize(int width, int height);
+    void getPreviewSize(int *width, int *height) const;
+    void getSupportedPreviewSizes(Vector<Size> &sizes) const;
+
+    // Set the dimensions in pixels to the given width and height
+    // for video frames. The given width and height must be one
+    // of the supported dimensions returned from
+    // getSupportedVideoSizes(). Must not be called if
+    // getSupportedVideoSizes() returns an empty Vector of Size.
+    void setVideoSize(int width, int height);
+    // Retrieve the current dimensions (width and height)
+    // in pixels for video frames, which must be one of the
+    // supported dimensions returned from getSupportedVideoSizes().
+    // Must not be called if getSupportedVideoSizes() returns an
+    // empty Vector of Size.
+    void getVideoSize(int *width, int *height) const;
+    // Retrieve a Vector of supported dimensions (width and height)
+    // in pixels for video frames. If sizes returned from the method
+    // is empty, the camera does not support calls to setVideoSize()
+    // or getVideoSize(). In adddition, it also indicates that
+    // the camera only has a single output, and does not have
+    // separate output for video frames and preview frame.
+    void getSupportedVideoSizes(Vector<Size> &sizes) const;
+    // Retrieve the preferred preview size (width and height) in pixels
+    // for video recording. The given width and height must be one of
+    // supported preview sizes returned from getSupportedPreviewSizes().
+    // Must not be called if getSupportedVideoSizes() returns an empty
+    // Vector of Size. If getSupportedVideoSizes() returns an empty
+    // Vector of Size, the width and height returned from this method
+    // is invalid, and is "-1x-1".
+    void getPreferredPreviewSizeForVideo(int *width, int *height) const;
+
+    void setPreviewFrameRate(int fps);
+    int getPreviewFrameRate() const;
+    void getPreviewFpsRange(int *min_fps, int *max_fps) const;
+    void setPreviewFpsRange(int min_fps, int max_fps);
+    void setPreviewFormat(const char *format);
+    const char *getPreviewFormat() const;
+    void setPictureSize(int width, int height);
+    void getPictureSize(int *width, int *height) const;
+    void getSupportedPictureSizes(Vector<Size> &sizes) const;
+    void setPictureFormat(const char *format);
+    const char *getPictureFormat() const;
+
+    void dump() const;
+    status_t dump(int fd, const Vector<String16>& args) const;
+
+private:
+
+    // Quick and dirty map that maintains insertion order
+    template <typename KeyT, typename ValueT>
+    struct OrderedKeyedVector {
+
+        ssize_t add(const KeyT& key, const ValueT& value) {
+            return mList.add(Pair(key, value));
+        }
+
+        size_t size() const {
+            return mList.size();
+        }
+
+        const KeyT& keyAt(size_t idx) const {
+            return mList[idx].mKey;
+        }
+
+        const ValueT& valueAt(size_t idx) const {
+            return mList[idx].mValue;
+        }
+
+        const ValueT& valueFor(const KeyT& key) const {
+            ssize_t i = indexOfKey(key);
+            LOG_ALWAYS_FATAL_IF(i<0, "%s: key not found", __PRETTY_FUNCTION__);
+
+            return valueAt(i);
+        }
+
+        ssize_t indexOfKey(const KeyT& key) const {
+                size_t vectorIdx = 0;
+                for (; vectorIdx < mList.size(); ++vectorIdx) {
+                    if (mList[vectorIdx].mKey == key) {
+                        return (ssize_t) vectorIdx;
+                    }
+                }
+
+                return NAME_NOT_FOUND;
+        }
+
+        ssize_t removeItem(const KeyT& key) {
+            size_t vectorIdx = (size_t) indexOfKey(key);
+
+            if (vectorIdx < 0) {
+                return vectorIdx;
+            }
+
+            return mList.removeAt(vectorIdx);
+        }
+
+        void clear() {
+            mList.clear();
+        }
+
+        // Same as removing and re-adding. The key's index changes to max.
+        ssize_t replaceValueFor(const KeyT& key, const ValueT& value) {
+            removeItem(key);
+            return add(key, value);
+        }
+
+    private:
+
+        struct Pair {
+            Pair() : mKey(), mValue() {}
+            Pair(const KeyT& key, const ValueT& value) :
+                    mKey(key),
+                    mValue(value) {}
+            KeyT   mKey;
+            ValueT mValue;
+        };
+
+        Vector<Pair> mList;
+    };
+
+    /**
+     * Order matters: Keys that are set() later are stored later in the map.
+     *
+     * If two keys have meaning that conflict, then the later-set key
+     * wins.
+     *
+     * For example, preview FPS and preview FPS range conflict since only
+     * we only want to use the FPS range if that's the last thing that was set.
+     * So in that case, only use preview FPS range if it was set later than
+     * the preview FPS.
+     */
+    OrderedKeyedVector<String8,String8>    mMap;
+};
+
+}; // namespace android
+
+#endif
diff --git a/services/camera/libcameraservice/api1/client2/Parameters.cpp b/services/camera/libcameraservice/api1/client2/Parameters.cpp
index 5196e09..61e3588 100644
--- a/services/camera/libcameraservice/api1/client2/Parameters.cpp
+++ b/services/camera/libcameraservice/api1/client2/Parameters.cpp
@@ -16,7 +16,7 @@
 
 #define LOG_TAG "Camera2-Parameters"
 #define ATRACE_TAG ATRACE_TAG_CAMERA
-//#define LOG_NDEBUG 0
+// #define LOG_NDEBUG 0
 
 #include <utils/Log.h>
 #include <utils/Trace.h>
@@ -92,26 +92,6 @@
         staticInfo(ANDROID_CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES, 2);
     if (!availableFpsRanges.count) return NO_INIT;
 
-    previewFpsRange[0] = availableFpsRanges.data.i32[0];
-    previewFpsRange[1] = availableFpsRanges.data.i32[1];
-
-    params.set(CameraParameters::KEY_PREVIEW_FPS_RANGE,
-            String8::format("%d,%d",
-                    previewFpsRange[0] * kFpsToApiScale,
-                    previewFpsRange[1] * kFpsToApiScale));
-
-    {
-        String8 supportedPreviewFpsRange;
-        for (size_t i=0; i < availableFpsRanges.count; i += 2) {
-            if (i != 0) supportedPreviewFpsRange += ",";
-            supportedPreviewFpsRange += String8::format("(%d,%d)",
-                    availableFpsRanges.data.i32[i] * kFpsToApiScale,
-                    availableFpsRanges.data.i32[i+1] * kFpsToApiScale);
-        }
-        params.set(CameraParameters::KEY_SUPPORTED_PREVIEW_FPS_RANGE,
-                supportedPreviewFpsRange);
-    }
-
     previewFormat = HAL_PIXEL_FORMAT_YCrCb_420_SP;
     params.set(CameraParameters::KEY_PREVIEW_FORMAT,
             formatEnumToString(previewFormat)); // NV21
@@ -179,6 +159,9 @@
                 supportedPreviewFormats);
     }
 
+    previewFpsRange[0] = availableFpsRanges.data.i32[0];
+    previewFpsRange[1] = availableFpsRanges.data.i32[1];
+
     // PREVIEW_FRAME_RATE / SUPPORTED_PREVIEW_FRAME_RATES are deprecated, but
     // still have to do something sane for them
 
@@ -187,6 +170,27 @@
     params.set(CameraParameters::KEY_PREVIEW_FRAME_RATE,
             previewFps);
 
+    // PREVIEW_FPS_RANGE
+    // -- Order matters. Set range after single value to so that a roundtrip
+    //    of setParameters(getParameters()) would keep the FPS range in higher
+    //    order.
+    params.set(CameraParameters::KEY_PREVIEW_FPS_RANGE,
+            String8::format("%d,%d",
+                    previewFpsRange[0] * kFpsToApiScale,
+                    previewFpsRange[1] * kFpsToApiScale));
+
+    {
+        String8 supportedPreviewFpsRange;
+        for (size_t i=0; i < availableFpsRanges.count; i += 2) {
+            if (i != 0) supportedPreviewFpsRange += ",";
+            supportedPreviewFpsRange += String8::format("(%d,%d)",
+                    availableFpsRanges.data.i32[i] * kFpsToApiScale,
+                    availableFpsRanges.data.i32[i+1] * kFpsToApiScale);
+        }
+        params.set(CameraParameters::KEY_SUPPORTED_PREVIEW_FPS_RANGE,
+                supportedPreviewFpsRange);
+    }
+
     {
         SortedVector<int32_t> sortedPreviewFrameRates;
 
@@ -1084,7 +1088,7 @@
 status_t Parameters::set(const String8& paramString) {
     status_t res;
 
-    CameraParameters newParams(paramString);
+    CameraParameters2 newParams(paramString);
 
     // TODO: Currently ignoring any changes to supposedly read-only parameters
     // such as supported preview sizes, etc. Should probably produce an error if
@@ -1127,29 +1131,73 @@
     // RECORDING_HINT (always supported)
     validatedParams.recordingHint = boolFromString(
         newParams.get(CameraParameters::KEY_RECORDING_HINT) );
-    bool recordingHintChanged = validatedParams.recordingHint != recordingHint;
-    ALOGV_IF(recordingHintChanged, "%s: Recording hint changed to %d",
-            __FUNCTION__, recordingHintChanged);
+    IF_ALOGV() { // Avoid unused variable warning
+        bool recordingHintChanged =
+                validatedParams.recordingHint != recordingHint;
+        if (recordingHintChanged) {
+            ALOGV("%s: Recording hint changed to %d",
+                  __FUNCTION__, validatedParams.recordingHint);
+        }
+    }
 
     // PREVIEW_FPS_RANGE
-    bool fpsRangeChanged = false;
-    int32_t lastSetFpsRange[2];
 
-    params.getPreviewFpsRange(&lastSetFpsRange[0], &lastSetFpsRange[1]);
-    lastSetFpsRange[0] /= kFpsToApiScale;
-    lastSetFpsRange[1] /= kFpsToApiScale;
+    /**
+     * Use the single FPS value if it was set later than the range.
+     * Otherwise, use the range value.
+     */
+    bool fpsUseSingleValue;
+    {
+        const char *fpsRange, *fpsSingle;
 
+        fpsRange = newParams.get(CameraParameters::KEY_PREVIEW_FRAME_RATE);
+        fpsSingle = newParams.get(CameraParameters::KEY_PREVIEW_FPS_RANGE);
+
+        /**
+         * Pick either the range or the single key if only one was set.
+         *
+         * If both are set, pick the one that has greater set order.
+         */
+        if (fpsRange == NULL && fpsSingle == NULL) {
+            ALOGE("%s: FPS was not set. One of %s or %s must be set.",
+                  __FUNCTION__, CameraParameters::KEY_PREVIEW_FRAME_RATE,
+                  CameraParameters::KEY_PREVIEW_FPS_RANGE);
+            return BAD_VALUE;
+        } else if (fpsRange == NULL) {
+            fpsUseSingleValue = true;
+            ALOGV("%s: FPS range not set, using FPS single value",
+                  __FUNCTION__);
+        } else if (fpsSingle == NULL) {
+            fpsUseSingleValue = false;
+            ALOGV("%s: FPS single not set, using FPS range value",
+                  __FUNCTION__);
+        } else {
+            int fpsKeyOrder;
+            res = newParams.compareSetOrder(
+                    CameraParameters::KEY_PREVIEW_FRAME_RATE,
+                    CameraParameters::KEY_PREVIEW_FPS_RANGE,
+                    &fpsKeyOrder);
+            LOG_ALWAYS_FATAL_IF(res != OK, "Impossibly bad FPS keys");
+
+            fpsUseSingleValue = (fpsKeyOrder > 0);
+
+        }
+
+        ALOGV("%s: Preview FPS value is used from '%s'",
+              __FUNCTION__, fpsUseSingleValue ? "single" : "range");
+    }
     newParams.getPreviewFpsRange(&validatedParams.previewFpsRange[0],
             &validatedParams.previewFpsRange[1]);
+
     validatedParams.previewFpsRange[0] /= kFpsToApiScale;
     validatedParams.previewFpsRange[1] /= kFpsToApiScale;
 
-    // Compare the FPS range value from the last set() to the current set()
-    // to determine if the client has changed it
-    if (validatedParams.previewFpsRange[0] != lastSetFpsRange[0] ||
-            validatedParams.previewFpsRange[1] != lastSetFpsRange[1]) {
+    // Ignore the FPS range if the FPS single has higher precedence
+    if (!fpsUseSingleValue) {
+        ALOGV("%s: Preview FPS range (%d, %d)", __FUNCTION__,
+                validatedParams.previewFpsRange[0],
+                validatedParams.previewFpsRange[1]);
 
-        fpsRangeChanged = true;
         camera_metadata_ro_entry_t availablePreviewFpsRanges =
             staticInfo(ANDROID_CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES, 2);
         for (i = 0; i < availablePreviewFpsRanges.count; i += 2) {
@@ -1200,14 +1248,13 @@
         }
     }
 
-    // PREVIEW_FRAME_RATE Deprecated, only use if the preview fps range is
-    // unchanged this time.  The single-value FPS is the same as the minimum of
-    // the range.  To detect whether the application has changed the value of
-    // previewFps, compare against their last-set preview FPS.
-    if (!fpsRangeChanged) {
+    // PREVIEW_FRAME_RATE Deprecated
+    // - Use only if the single FPS value was set later than the FPS range
+    if (fpsUseSingleValue) {
         int previewFps = newParams.getPreviewFrameRate();
-        int lastSetPreviewFps = params.getPreviewFrameRate();
-        if (previewFps != lastSetPreviewFps || recordingHintChanged) {
+        ALOGV("%s: Preview FPS single value requested: %d",
+              __FUNCTION__, previewFps);
+        {
             camera_metadata_ro_entry_t availableFrameRates =
                 staticInfo(ANDROID_CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES);
             /**
@@ -1276,6 +1323,35 @@
         }
     }
 
+    /**
+     * Update Preview FPS and Preview FPS ranges based on
+     * what we actually set.
+     *
+     * This updates the API-visible (Camera.Parameters#getParameters) values of
+     * the FPS fields, not only the internal versions.
+     *
+     * Order matters: The value that was set last takes precedence.
+     * - If the client does a setParameters(getParameters()) we retain
+     *   the same order for preview FPS.
+     */
+    if (!fpsUseSingleValue) {
+        // Set fps single, then fps range (range wins)
+        newParams.setPreviewFrameRate(
+                fpsFromRange(/*min*/validatedParams.previewFpsRange[0],
+                             /*max*/validatedParams.previewFpsRange[1]));
+        newParams.setPreviewFpsRange(
+                validatedParams.previewFpsRange[0] * kFpsToApiScale,
+                validatedParams.previewFpsRange[1] * kFpsToApiScale);
+    } else {
+        // Set fps range, then fps single (single wins)
+        newParams.setPreviewFpsRange(
+                validatedParams.previewFpsRange[0] * kFpsToApiScale,
+                validatedParams.previewFpsRange[1] * kFpsToApiScale);
+        // Set this to the same value, but with higher priority
+        newParams.setPreviewFrameRate(
+                newParams.getPreviewFrameRate());
+    }
+
     // PICTURE_SIZE
     newParams.getPictureSize(&validatedParams.pictureWidth,
             &validatedParams.pictureHeight);
diff --git a/services/camera/libcameraservice/api1/client2/Parameters.h b/services/camera/libcameraservice/api1/client2/Parameters.h
index 32dbd42..da07ccf 100644
--- a/services/camera/libcameraservice/api1/client2/Parameters.h
+++ b/services/camera/libcameraservice/api1/client2/Parameters.h
@@ -25,6 +25,7 @@
 #include <utils/Vector.h>
 #include <utils/KeyedVector.h>
 #include <camera/CameraParameters.h>
+#include <camera/CameraParameters2.h>
 #include <camera/CameraMetadata.h>
 
 namespace android {
@@ -32,7 +33,7 @@
 
 /**
  * Current camera state; this is the full state of the Camera under the old
- * camera API (contents of the CameraParameters object in a more-efficient
+ * camera API (contents of the CameraParameters2 object in a more-efficient
  * format, plus other state). The enum values are mostly based off the
  * corresponding camera2 enums, not the camera1 strings. A few are defined here
  * if they don't cleanly map to camera2 values.
@@ -128,7 +129,7 @@
         LIGHTFX_HDR
     } lightFx;
 
-    CameraParameters params;
+    CameraParameters2 params;
     String8 paramsFlattened;
 
     // These parameters are also part of the camera API-visible state, but not