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 <map>
   9 #include <set>
  10 #include <string>
  11 #include <vector>
  12
  13 #include "base/compiler_specific.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "media/base/audio_decoder_config.h"
  16 #include "media/base/media_log.h"
  17 #include "media/base/text_track.h"
  18 #include "media/base/video_decoder_config.h"
  19 #include "media/webm/webm_audio_client.h"
  20 #include "media/webm/webm_content_encodings_client.h"
  21 #include "media/webm/webm_parser.h"
  22 #include "media/webm/webm_video_client.h"
  23
  24 namespace media {
  25
  26 // Parser for WebM Tracks element.
  27 class MEDIA_EXPORT WebMTracksParser : public WebMParserClient {
  28  public:
  29   explicit WebMTracksParser(const LogCB& log_cb, bool ignore_text_tracks);
  30   virtual ~WebMTracksParser();
  31
  32   // Parses a WebM Tracks element in |buf|.
  33   //
  34   // Returns -1 if the parse fails.
  35   // Returns 0 if more data is needed.
  36   // Returns the number of bytes parsed on success.
  37   int Parse(const uint8* buf, int size);
  38
  39   int64 audio_track_num() const { return audio_track_num_; }
  40   int64 video_track_num() const { return video_track_num_; }
  41   const std::set<int64>& ignored_tracks() const { return ignored_tracks_; }
  42
  43   const std::string& audio_encryption_key_id() const {
  44     return audio_encryption_key_id_;
  45   }
  46
  47   const AudioDecoderConfig& audio_decoder_config() {
  48     return audio_decoder_config_;
  49   }
  50
  51   const std::string& video_encryption_key_id() const {
  52     return video_encryption_key_id_;
  53   }
  54
  55   const VideoDecoderConfig& video_decoder_config() {
  56     return video_decoder_config_;
  57   }
  58
  59   struct TextTrackInfo {
  60     TextKind kind;
  61     std::string name;
  62     std::string language;
  63   };
  64
  65   typedef std::map<int64, TextTrackInfo> TextTracks;
  66
  67   const TextTracks& text_tracks() const {
  68     return text_tracks_;
  69   }
  70
  71  private:
  72   // WebMParserClient implementation.
  73   virtual WebMParserClient* OnListStart(int id) OVERRIDE;
  74   virtual bool OnListEnd(int id) OVERRIDE;
  75   virtual bool OnUInt(int id, int64 val) OVERRIDE;
  76   virtual bool OnFloat(int id, double val) OVERRIDE;
  77   virtual bool OnBinary(int id, const uint8* data, int size) OVERRIDE;
  78   virtual bool OnString(int id, const std::string& str) OVERRIDE;
  79
  80   int64 track_type_;
  81   int64 track_num_;
  82   std::string track_name_;
  83   std::string track_language_;
  84   std::string codec_id_;
  85   std::vector<uint8> codec_private_;
  86   scoped_ptr<WebMContentEncodingsClient> track_content_encodings_client_;
  87
  88   int64 audio_track_num_;
  89   int64 video_track_num_;
  90   bool ignore_text_tracks_;
  91   TextTracks text_tracks_;
  92   std::set<int64> ignored_tracks_;
  93   std::string audio_encryption_key_id_;
  94   std::string video_encryption_key_id_;
  95   LogCB log_cb_;
  96
  97   WebMAudioClient audio_client_;
  98   AudioDecoderConfig audio_decoder_config_;
  99
 100   WebMVideoClient video_client_;
 101   VideoDecoderConfig video_decoder_config_;
 102
 103   DISALLOW_COPY_AND_ASSIGN(WebMTracksParser);
 104 };
 105
 106 }  // namespace media
 107
 108 #endif  // MEDIA_WEBM_WEBM_TRACKS_PARSER_H_