Implemented HEVC video demuxing and parsing

media/filters/ffmpeg_h265_to_annex_b_bitstream_converter.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef MEDIA_FILTERS_FFMPEG_AAC_BITSTREAM_CONVERTER_H_
-#define MEDIA_FILTERS_FFMPEG_AAC_BITSTREAM_CONVERTER_H_
+#ifndef MEDIA_FILTERS_FFMPEG_H265_TO_ANNEX_B_BITSTREAM_CONVERTER_H_
+#define MEDIA_FILTERS_FFMPEG_H265_TO_ANNEX_B_BITSTREAM_CONVERTER_H_
 
 #include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
 #include "media/base/media_export.h"
 #include "media/filters/ffmpeg_bitstream_converter.h"
+#include "media/formats/mp4/hevc.h"
 
 // Forward declarations for FFmpeg datatypes used.
 struct AVCodecContext;
 struct AVPacket;
 
 namespace media {
 
-// Bitstream converter that adds ADTS headers to AAC frames.
-class MEDIA_EXPORT FFmpegAACBitstreamConverter
+// Bitstream converter that converts H.265 bitstream based FFmpeg packets into
+// H.265 Annex B bytestream format.
+class MEDIA_EXPORT FFmpegH265ToAnnexBBitstreamConverter
     : public FFmpegBitstreamConverter {
  public:
-  enum { kAdtsHeaderSize = 7 };
-
   // The |stream_codec_context| will be used during conversion and should be the
   // AVCodecContext for the stream sourcing these packets. A reference to
   // |stream_codec_context| is retained, so it must outlive this class.
-  explicit FFmpegAACBitstreamConverter(AVCodecContext* stream_codec_context);
-  ~FFmpegAACBitstreamConverter() override;
+  explicit FFmpegH265ToAnnexBBitstreamConverter(
+      AVCodecContext* stream_codec_context);
+
+  ~FFmpegH265ToAnnexBBitstreamConverter() override;
 
   // FFmpegBitstreamConverter implementation.
-  // Uses FFmpeg allocation methods for buffer allocation to ensure
-  // compatibility with FFmpeg's memory management.
   bool ConvertPacket(AVPacket* packet) override;
 
  private:
+  scoped_ptr<mp4::HEVCDecoderConfigurationRecord> hevc_config_;
+
   // Variable to hold a pointer to memory where we can access the global
   // data from the FFmpeg file format's global headers.
   AVCodecContext* stream_codec_context_;
 
-  bool header_generated_;
-  uint8_t hdr_[kAdtsHeaderSize];
-  int codec_;
-  int audio_profile_;
-  int sample_rate_index_;
-  int channel_configuration_;
-  int frame_length_;
-
-  DISALLOW_COPY_AND_ASSIGN(FFmpegAACBitstreamConverter);
+  DISALLOW_COPY_AND_ASSIGN(FFmpegH265ToAnnexBBitstreamConverter);
 };
 
 }  // namespace media
 
-#endif  // MEDIA_FILTERS_FFMPEG_AAC_BITSTREAM_CONVERTER_H_
+#endif  // MEDIA_FILTERS_FFMPEG_H265_TO_ANNEX_B_BITSTREAM_CONVERTER_H_
+