media/webm/webm_tracks_parser.h

   1 // Copyright (c) 2012 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_WEBM_WEBM_TRACKS_PARSER_H_
   6 #define MEDIA_WEBM_WEBM_TRACKS_PARSER_H_
   7
   8 #include <set>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/compiler_specific.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "media/base/audio_decoder_config.h"
  15 #include "media/base/media_log.h"
  16 #include "media/base/video_decoder_config.h"
  17 #include "media/webm/webm_audio_client.h"
  18 #include "media/webm/webm_content_encodings_client.h"
  19 #include "media/webm/webm_parser.h"
  20 #include "media/webm/webm_video_client.h"
  21
  22 namespace media {
  23
  24 // Parser for WebM Tracks element.
  25 class WebMTracksParser : public WebMParserClient {
  26  public:
  27   explicit WebMTracksParser(const LogCB& log_cb);
  28   virtual ~WebMTracksParser();
  29
  30   // Parses a WebM Tracks element in |buf|.
  31   //
  32   // Returns -1 if the parse fails.
  33   // Returns 0 if more data is needed.
  34   // Returns the number of bytes parsed on success.
  35   int Parse(const uint8* buf, int size);
  36
  37   int64 audio_track_num() const { return audio_track_num_; }
  38   int64 video_track_num() const { return video_track_num_; }
  39   const std::set<int64>& ignored_tracks() const { return ignored_tracks_; }
  40
  41   const std::string& audio_encryption_key_id() const {
  42     return audio_encryption_key_id_;
  43   }
  44
  45   const AudioDecoderConfig& audio_decoder_config() {
  46     return audio_decoder_config_;
  47   }
  48
  49   const std::string& video_encryption_key_id() const {
  50     return video_encryption_key_id_;
  51   }
  52
  53   const VideoDecoderConfig& video_decoder_config() {
  54     return video_decoder_config_;
  55   }
  56
  57   const std::set<int>& text_tracks() const {
  58     return text_tracks_;
  59   }
  60
  61  private:
  62   // WebMParserClient implementation.
  63   virtual WebMParserClient* OnListStart(int id) OVERRIDE;
  64   virtual bool OnListEnd(int id) OVERRIDE;
  65   virtual bool OnUInt(int id, int64 val) OVERRIDE;
  66   virtual bool OnFloat(int id, double val) OVERRIDE;
  67   virtual bool OnBinary(int id, const uint8* data, int size) OVERRIDE;
  68   virtual bool OnString(int id, const std::string& str) OVERRIDE;
  69
  70   int64 track_type_;
  71   int64 track_num_;
  72   std::string codec_id_;
  73   std::vector<uint8> codec_private_;
  74   scoped_ptr<WebMContentEncodingsClient> track_content_encodings_client_;
  75
  76   int64 audio_track_num_;
  77   int64 video_track_num_;
  78   std::set<int> text_tracks_;
  79   std::set<int64> ignored_tracks_;
  80   std::string audio_encryption_key_id_;
  81   std::string video_encryption_key_id_;
  82   LogCB log_cb_;
  83
  84   WebMAudioClient audio_client_;
  85   AudioDecoderConfig audio_decoder_config_;
  86
  87   WebMVideoClient video_client_;
  88   VideoDecoderConfig video_decoder_config_;
  89
  90   DISALLOW_COPY_AND_ASSIGN(WebMTracksParser);
  91 };
  92
  93 }  // namespace media
  94
  95 #endif  // MEDIA_WEBM_WEBM_TRACKS_PARSER_H_