1 files changed, 64 insertions, 0 deletions
diff --git a/dom/media/webrtc/AudioOutputObserver.h b/dom/media/webrtc/AudioOutputObserver.h
new file mode 100644
index 000000000..517eaa891
--- /dev/null
+++ b/dom/media/webrtc/AudioOutputObserver.h
@@ -0,0 +1,64 @@
+/* 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/. */
+
+#ifndef AUDIOOUTPUTOBSERVER_H_
+#define AUDIOOUTPUTOBSERVER_H_
+
+#include "mozilla/StaticPtr.h"
+#include "nsAutoPtr.h"
+#include "AudioMixer.h"
+
+namespace webrtc {
+class SingleRwFifo;
+}
+
+namespace mozilla {
+
+typedef struct FarEndAudioChunk_ {
+  uint16_t mSamples;
+  bool mOverrun;
+  int16_t mData[1]; // variable-length
+} FarEndAudioChunk;
+
+// XXX Really a singleton currently
+class AudioOutputObserver : public MixerCallbackReceiver
+{
+public:
+  AudioOutputObserver();
+
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(AudioOutputObserver);
+
+  void MixerCallback(AudioDataValue* aMixedBuffer,
+                     AudioSampleFormat aFormat,
+                     uint32_t aChannels,
+                     uint32_t aFrames,
+                     uint32_t aSampleRate) override;
+
+  void Clear();
+  void InsertFarEnd(const AudioDataValue *aBuffer, uint32_t aFrames, bool aOverran,
+                    int aFreq, int aChannels, AudioSampleFormat aFormat);
+  uint32_t PlayoutFrequency() { return mPlayoutFreq; }
+  uint32_t PlayoutChannels() { return mPlayoutChannels; }
+
+  FarEndAudioChunk *Pop();
+  uint32_t Size();
+
+private:
+  virtual ~AudioOutputObserver();
+  uint32_t mPlayoutFreq;
+  uint32_t mPlayoutChannels;
+
+  nsAutoPtr<webrtc::SingleRwFifo> mPlayoutFifo;
+  uint32_t mChunkSize;
+
+  // chunking to 10ms support
+  FarEndAudioChunk *mSaved; // can't be nsAutoPtr since we need to use free(), not delete
+  uint32_t mSamplesSaved;
+};
+
+extern StaticRefPtr<AudioOutputObserver> gFarendObserver;
+
+}
+
+#endif