diff -r 000000000000 -r 6474c204b198 content/media/encoder/TrackEncoder.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/encoder/TrackEncoder.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,281 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "TrackEncoder.h"
+#include "AudioChannelFormat.h"
+#include "MediaStreamGraph.h"
+#include "prlog.h"
+#include "VideoUtils.h"
+
+#undef LOG
+#ifdef MOZ_WIDGET_GONK
+#include <android/log.h>
+#define LOG(args...) __android_log_print(ANDROID_LOG_INFO, "MediaEncoder", ## args);
+#else
+#define LOG(args, ...)
+#endif
+
+namespace mozilla {
+
+#ifdef PR_LOGGING
+PRLogModuleInfo* gTrackEncoderLog;
+#define TRACK_LOG(type, msg) PR_LOG(gTrackEncoderLog, type, msg)
+#else
+#define TRACK_LOG(type, msg)
+#endif
+
+static const int DEFAULT_CHANNELS = 1;
+static const int DEFAULT_SAMPLING_RATE = 16000;
+static const int DEFAULT_FRAME_WIDTH = 640;
+static const int DEFAULT_FRAME_HEIGHT = 480;
+static const int DEFAULT_TRACK_RATE = USECS_PER_S;
+
+TrackEncoder::TrackEncoder()
+  : mReentrantMonitor("media.TrackEncoder")
+  , mEncodingComplete(false)
+  , mEosSetInEncoder(false)
+  , mInitialized(false)
+  , mEndOfStream(false)
+  , mCanceled(false)
+#ifdef PR_LOGGING
+  , mAudioInitCounter(0)
+  , mVideoInitCounter(0)
+#endif
+{
+#ifdef PR_LOGGING
+  if (!gTrackEncoderLog) {
+    gTrackEncoderLog = PR_NewLogModule("TrackEncoder");
+  }
+#endif
+}
+
+void
+AudioTrackEncoder::NotifyQueuedTrackChanges(MediaStreamGraph* aGraph,
+                                            TrackID aID,
+                                            TrackRate aTrackRate,
+                                            TrackTicks aTrackOffset,
+                                            uint32_t aTrackEvents,
+                                            const MediaSegment& aQueuedMedia)
+{
+  if (mCanceled) {
+    return;
+  }
+
+  const AudioSegment& audio = static_cast<const AudioSegment&>(aQueuedMedia);
+
+  // Check and initialize parameters for codec encoder.
+  if (!mInitialized) {
+#ifdef PR_LOGGING
+    mAudioInitCounter++;
+    TRACK_LOG(PR_LOG_DEBUG, ("Init the audio encoder %d times", mAudioInitCounter));
+#endif
+    AudioSegment::ChunkIterator iter(const_cast<AudioSegment&>(audio));
+    while (!iter.IsEnded()) {
+      AudioChunk chunk = *iter;
+
+      // The number of channels is determined by the first non-null chunk, and
+      // thus the audio encoder is initialized at this time.
+      if (!chunk.IsNull()) {
+        nsresult rv = Init(chunk.mChannelData.Length(), aTrackRate);
+        if (NS_FAILED(rv)) {
+          LOG("[AudioTrackEncoder]: Fail to initialize the encoder!");
+          NotifyCancel();
+        }
+        break;
+      }
+
+      iter.Next();
+    }
+  }
+
+  // Append and consume this raw segment.
+  AppendAudioSegment(audio);
+
+
+  // The stream has stopped and reached the end of track.
+  if (aTrackEvents == MediaStreamListener::TRACK_EVENT_ENDED) {
+    LOG("[AudioTrackEncoder]: Receive TRACK_EVENT_ENDED .");
+    NotifyEndOfStream();
+  }
+}
+
+void
+AudioTrackEncoder::NotifyEndOfStream()
+{
+  // If source audio track is completely silent till the end of encoding,
+  // initialize the encoder with default channel counts and sampling rate.
+  if (!mCanceled && !mInitialized) {
+    Init(DEFAULT_CHANNELS, DEFAULT_SAMPLING_RATE);
+  }
+
+  ReentrantMonitorAutoEnter mon(mReentrantMonitor);
+  mEndOfStream = true;
+  mReentrantMonitor.NotifyAll();
+}
+
+nsresult
+AudioTrackEncoder::AppendAudioSegment(const AudioSegment& aSegment)
+{
+  ReentrantMonitorAutoEnter mon(mReentrantMonitor);
+
+  AudioSegment::ChunkIterator iter(const_cast<AudioSegment&>(aSegment));
+  while (!iter.IsEnded()) {
+    AudioChunk chunk = *iter;
+    // Append and consume both non-null and null chunks.
+    mRawSegment.AppendAndConsumeChunk(&chunk);
+    iter.Next();
+  }
+
+  if (mRawSegment.GetDuration() >= GetPacketDuration()) {
+    mReentrantMonitor.NotifyAll();
+  }
+
+  return NS_OK;
+}
+
+static const int AUDIO_PROCESSING_FRAMES = 640; /* > 10ms of 48KHz audio */
+static const uint8_t gZeroChannel[MAX_AUDIO_SAMPLE_SIZE*AUDIO_PROCESSING_FRAMES] = {0};
+
+/*static*/
+void
+AudioTrackEncoder::InterleaveTrackData(AudioChunk& aChunk,
+                                       int32_t aDuration,
+                                       uint32_t aOutputChannels,
+                                       AudioDataValue* aOutput)
+{
+  if (aChunk.mChannelData.Length() < aOutputChannels) {
+    // Up-mix. This might make the mChannelData have more than aChannels.
+    AudioChannelsUpMix(&aChunk.mChannelData, aOutputChannels, gZeroChannel);
+  }
+
+  if (aChunk.mChannelData.Length() > aOutputChannels) {
+    DownmixAndInterleave(aChunk.mChannelData, aChunk.mBufferFormat, aDuration,
+                         aChunk.mVolume, aOutputChannels, aOutput);
+  } else {
+    InterleaveAndConvertBuffer(aChunk.mChannelData.Elements(),
+                               aChunk.mBufferFormat, aDuration, aChunk.mVolume,
+                               aOutputChannels, aOutput);
+  }
+}
+
+/*static*/
+void
+AudioTrackEncoder::DeInterleaveTrackData(AudioDataValue* aInput,
+                                         int32_t aDuration,
+                                         int32_t aChannels,
+                                         AudioDataValue* aOutput)
+{
+  for (int32_t i = 0; i < aChannels; ++i) {
+    for(int32_t j = 0; j < aDuration; ++j) {
+      aOutput[i * aDuration + j] = aInput[i + j * aChannels];
+    }
+  }
+}
+
+void
+VideoTrackEncoder::NotifyQueuedTrackChanges(MediaStreamGraph* aGraph,
+                                            TrackID aID,
+                                            TrackRate aTrackRate,
+                                            TrackTicks aTrackOffset,
+                                            uint32_t aTrackEvents,
+                                            const MediaSegment& aQueuedMedia)
+{
+  if (mCanceled) {
+    return;
+  }
+
+  const VideoSegment& video = static_cast<const VideoSegment&>(aQueuedMedia);
+
+   // Check and initialize parameters for codec encoder.
+  if (!mInitialized) {
+#ifdef PR_LOGGING
+    mVideoInitCounter++;
+    TRACK_LOG(PR_LOG_DEBUG, ("Init the video encoder %d times", mVideoInitCounter));
+#endif
+    VideoSegment::ChunkIterator iter(const_cast<VideoSegment&>(video));
+    while (!iter.IsEnded()) {
+      VideoChunk chunk = *iter;
+      if (!chunk.IsNull()) {
+        gfx::IntSize imgsize = chunk.mFrame.GetImage()->GetSize();
+        gfxIntSize intrinsicSize = chunk.mFrame.GetIntrinsicSize();
+        nsresult rv = Init(imgsize.width, imgsize.height,
+                           intrinsicSize.width, intrinsicSize.height,
+                           aTrackRate);
+        if (NS_FAILED(rv)) {
+          LOG("[VideoTrackEncoder]: Fail to initialize the encoder!");
+          NotifyCancel();
+        }
+        break;
+      }
+
+      iter.Next();
+    }
+  }
+
+  AppendVideoSegment(video);
+
+  // The stream has stopped and reached the end of track.
+  if (aTrackEvents == MediaStreamListener::TRACK_EVENT_ENDED) {
+    LOG("[VideoTrackEncoder]: Receive TRACK_EVENT_ENDED .");
+    NotifyEndOfStream();
+  }
+
+}
+
+nsresult
+VideoTrackEncoder::AppendVideoSegment(const VideoSegment& aSegment)
+{
+  ReentrantMonitorAutoEnter mon(mReentrantMonitor);
+
+  // Append all video segments from MediaStreamGraph, including null an
+  // non-null frames.
+  VideoSegment::ChunkIterator iter(const_cast<VideoSegment&>(aSegment));
+  while (!iter.IsEnded()) {
+    VideoChunk chunk = *iter;
+    nsRefPtr<layers::Image> image = chunk.mFrame.GetImage();
+    mRawSegment.AppendFrame(image.forget(), chunk.GetDuration(),
+                            chunk.mFrame.GetIntrinsicSize().ToIntSize());
+    iter.Next();
+  }
+
+  if (mRawSegment.GetDuration() > 0) {
+    mReentrantMonitor.NotifyAll();
+  }
+
+  return NS_OK;
+}
+
+void
+VideoTrackEncoder::NotifyEndOfStream()
+{
+  // If source video track is muted till the end of encoding, initialize the
+  // encoder with default frame width, frame height, and track rate.
+  if (!mCanceled && !mInitialized) {
+    Init(DEFAULT_FRAME_WIDTH, DEFAULT_FRAME_HEIGHT,
+         DEFAULT_FRAME_WIDTH, DEFAULT_FRAME_HEIGHT, DEFAULT_TRACK_RATE);
+  }
+
+  ReentrantMonitorAutoEnter mon(mReentrantMonitor);
+  mEndOfStream = true;
+  mReentrantMonitor.NotifyAll();
+}
+
+void
+VideoTrackEncoder::CreateMutedFrame(nsTArray<uint8_t>* aOutputBuffer)
+{
+  NS_ENSURE_TRUE_VOID(aOutputBuffer);
+
+  // Supports YUV420 image format only.
+  int yPlaneLen = mFrameWidth * mFrameHeight;
+  int cbcrPlaneLen = yPlaneLen / 2;
+  int frameLen = yPlaneLen + cbcrPlaneLen;
+
+  aOutputBuffer->SetLength(frameLen);
+  // Fill Y plane.
+  memset(aOutputBuffer->Elements(), 0x10, yPlaneLen);
+  // Fill Cb/Cr planes.
+  memset(aOutputBuffer->Elements() + yPlaneLen, 0x80, cbcrPlaneLen);
+}
+
+}