media/mp2t/mp2t_stream_parser.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_MP2T_MP2T_STREAM_PARSER_H_
   6 #define MEDIA_MP2T_MP2T_STREAM_PARSER_H_
   7
   8 #include <list>
   9 #include <map>
  10
  11 #include "base/memory/ref_counted.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "media/base/audio_decoder_config.h"
  14 #include "media/base/byte_queue.h"
  15 #include "media/base/media_export.h"
  16 #include "media/base/stream_parser.h"
  17 #include "media/base/video_decoder_config.h"
  18
  19 namespace media {
  20
  21 class StreamParserBuffer;
  22
  23 namespace mp2t {
  24
  25 class PidState;
  26
  27 class MEDIA_EXPORT Mp2tStreamParser : public StreamParser {
  28  public:
  29   explicit Mp2tStreamParser(bool sbr_in_mimetype);
  30   virtual ~Mp2tStreamParser();
  31
  32   // StreamParser implementation.
  33   virtual void Init(const InitCB& init_cb,
  34                     const NewConfigCB& config_cb,
  35                     const NewBuffersCB& new_buffers_cb,
  36                     const NewTextBuffersCB& text_cb,
  37                     const NeedKeyCB& need_key_cb,
  38                     const NewMediaSegmentCB& new_segment_cb,
  39                     const base::Closure& end_of_segment_cb,
  40                     const LogCB& log_cb) OVERRIDE;
  41   virtual void Flush() OVERRIDE;
  42   virtual bool Parse(const uint8* buf, int size) OVERRIDE;
  43
  44  private:
  45   typedef std::map<int, PidState*> PidMap;
  46
  47   struct BufferQueueWithConfig {
  48     BufferQueueWithConfig(bool is_cfg_sent,
  49                           const AudioDecoderConfig& audio_cfg,
  50                           const VideoDecoderConfig& video_cfg);
  51     ~BufferQueueWithConfig();
  52
  53     bool is_config_sent;
  54     AudioDecoderConfig audio_config;
  55     StreamParser::BufferQueue audio_queue;
  56     VideoDecoderConfig video_config;
  57     StreamParser::BufferQueue video_queue;
  58   };
  59
  60   // Callback invoked to register a Program Map Table.
  61   // Note: Does nothing if the PID is already registered.
  62   void RegisterPmt(int program_number, int pmt_pid);
  63
  64   // Callback invoked to register a PES pid.
  65   // Possible values for |stream_type| are defined in:
  66   // ISO-13818.1 / ITU H.222 Table 2.34 "Stream type assignments".
  67   // |pes_pid| is part of the Program Map Table refered by |pmt_pid|.
  68   void RegisterPes(int pmt_pid, int pes_pid, int stream_type);
  69
  70   // Since the StreamParser interface allows only one audio & video streams,
  71   // an automatic PID filtering should be applied to select the audio & video
  72   // streams.
  73   void UpdatePidFilter();
  74
  75   // Callback invoked each time the audio/video decoder configuration is
  76   // changed.
  77   void OnVideoConfigChanged(int pes_pid,
  78                             const VideoDecoderConfig& video_decoder_config);
  79   void OnAudioConfigChanged(int pes_pid,
  80                             const AudioDecoderConfig& audio_decoder_config);
  81
  82   // Invoke the initialization callback if needed.
  83   bool FinishInitializationIfNeeded();
  84
  85   // Callback invoked by the ES stream parser
  86   // to emit a new audio/video access unit.
  87   void OnEmitAudioBuffer(
  88       int pes_pid,
  89       scoped_refptr<StreamParserBuffer> stream_parser_buffer);
  90   void OnEmitVideoBuffer(
  91       int pes_pid,
  92       scoped_refptr<StreamParserBuffer> stream_parser_buffer);
  93   bool EmitRemainingBuffers();
  94
  95   // List of callbacks.
  96   InitCB init_cb_;
  97   NewConfigCB config_cb_;
  98   NewBuffersCB new_buffers_cb_;
  99   NeedKeyCB need_key_cb_;
 100   NewMediaSegmentCB new_segment_cb_;
 101   base::Closure end_of_segment_cb_;
 102   LogCB log_cb_;
 103
 104   // True when AAC SBR extension is signalled in the mimetype
 105   // (mp4a.40.5 in the codecs parameter).
 106   bool sbr_in_mimetype_;
 107
 108   // Bytes of the TS stream.
 109   ByteQueue ts_byte_queue_;
 110
 111   // List of PIDs and their state.
 112   PidMap pids_;
 113
 114   // Selected audio and video PIDs.
 115   int selected_audio_pid_;
 116   int selected_video_pid_;
 117
 118   // Pending audio & video buffers.
 119   std::list<BufferQueueWithConfig> buffer_queue_chain_;
 120
 121   // Whether |init_cb_| has been invoked.
 122   bool is_initialized_;
 123
 124   // Indicate whether a segment was started.
 125   bool segment_started_;
 126   bool first_video_frame_in_segment_;
 127   base::TimeDelta time_offset_;
 128
 129   DISALLOW_COPY_AND_ASSIGN(Mp2tStreamParser);
 130 };
 131
 132 }  // namespace mp2t
 133 }  // namespace media
 134
 135 #endif
 136