diff -r 000000000000 -r 6474c204b198 content/media/encoder/VorbisTrackEncoder.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/media/encoder/VorbisTrackEncoder.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,54 @@
+/* -*- 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/. */
+
+#ifndef VorbisTrackEncoder_h_
+#define VorbisTrackEncoder_h_
+
+#include "TrackEncoder.h"
+#include "nsCOMPtr.h"
+#include <vorbis/codec.h>
+
+namespace mozilla {
+
+class VorbisTrackEncoder : public AudioTrackEncoder
+{
+public:
+  VorbisTrackEncoder();
+  virtual ~VorbisTrackEncoder();
+
+  already_AddRefed<TrackMetadataBase> GetMetadata() MOZ_FINAL MOZ_OVERRIDE;
+
+  nsresult GetEncodedTrack(EncodedFrameContainer& aData) MOZ_FINAL MOZ_OVERRIDE;
+
+protected:
+  /**
+   * http://xiph.org/vorbis/doc/libvorbis/vorbis_analysis_buffer.html
+   * We use 1024 samples for the write buffer; libvorbis will construct packets
+   * with the appropriate duration for the encoding mode internally.
+   */
+  int GetPacketDuration() MOZ_FINAL MOZ_OVERRIDE {
+    return 1024;
+  }
+
+  nsresult Init(int aChannels, int aSamplingRate) MOZ_FINAL MOZ_OVERRIDE;
+
+private:
+  // Write Xiph-style lacing to aOutput.
+  void WriteLacing(nsTArray<uint8_t> *aOutput, int32_t aLacing);
+
+  // Get the encoded data from vorbis encoder and append into aData.
+  void GetEncodedFrames(EncodedFrameContainer& aData);
+
+  // vorbis codec members
+  // Struct that stores all the static vorbis bitstream settings.
+  vorbis_info mVorbisInfo;
+  // Central working state for the PCM->packet encoder.
+  vorbis_dsp_state mVorbisDsp;
+  // Local working space for PCM->packet encode.
+  vorbis_block mVorbisBlock;
+};
+
+}
+#endif