1 // Copyright 2014 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_FORMATS_WEBM_WEBM_TRACKS_PARSER_H_ 6 #define MEDIA_FORMATS_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 "base/time/time.h" 16 #include "media/base/audio_decoder_config.h" 17 #include "media/base/media_log.h" 18 #include "media/base/text_track_config.h" 19 #include "media/base/video_decoder_config.h" 20 #include "media/formats/webm/webm_audio_client.h" 21 #include "media/formats/webm/webm_content_encodings_client.h" 22 #include "media/formats/webm/webm_parser.h" 23 #include "media/formats/webm/webm_video_client.h" 24 25 namespace media { 26 27 // Parser for WebM Tracks element. 28 class MEDIA_EXPORT WebMTracksParser : public WebMParserClient { 29 public: 30 explicit WebMTracksParser(const LogCB& log_cb, bool ignore_text_tracks); 31 virtual ~WebMTracksParser(); 32 33 // Parses a WebM Tracks element in |buf|. 34 // 35 // Returns -1 if the parse fails. 36 // Returns 0 if more data is needed. 37 // Returns the number of bytes parsed on success. 38 int Parse(const uint8* buf, int size); 39 audio_track_num()40 int64 audio_track_num() const { return audio_track_num_; } video_track_num()41 int64 video_track_num() const { return video_track_num_; } 42 43 // If TrackEntry DefaultDuration field existed for the associated audio or 44 // video track, returns that value converted from ns to base::TimeDelta with 45 // precision not greater than |timecode_scale_in_us|. Defaults to 46 // kNoTimestamp(). 47 base::TimeDelta GetAudioDefaultDuration( 48 const double timecode_scale_in_us) const; 49 base::TimeDelta GetVideoDefaultDuration( 50 const double timecode_scale_in_us) const; 51 ignored_tracks()52 const std::set<int64>& ignored_tracks() const { return ignored_tracks_; } 53 audio_encryption_key_id()54 const std::string& audio_encryption_key_id() const { 55 return audio_encryption_key_id_; 56 } 57 audio_decoder_config()58 const AudioDecoderConfig& audio_decoder_config() { 59 return audio_decoder_config_; 60 } 61 video_encryption_key_id()62 const std::string& video_encryption_key_id() const { 63 return video_encryption_key_id_; 64 } 65 video_decoder_config()66 const VideoDecoderConfig& video_decoder_config() { 67 return video_decoder_config_; 68 } 69 70 typedef std::map<int, TextTrackConfig> TextTracks; 71 text_tracks()72 const TextTracks& text_tracks() const { 73 return text_tracks_; 74 } 75 76 private: 77 // WebMParserClient implementation. 78 virtual WebMParserClient* OnListStart(int id) OVERRIDE; 79 virtual bool OnListEnd(int id) OVERRIDE; 80 virtual bool OnUInt(int id, int64 val) OVERRIDE; 81 virtual bool OnFloat(int id, double val) OVERRIDE; 82 virtual bool OnBinary(int id, const uint8* data, int size) OVERRIDE; 83 virtual bool OnString(int id, const std::string& str) OVERRIDE; 84 85 int64 track_type_; 86 int64 track_num_; 87 int64 track_uid_; 88 std::string track_name_; 89 std::string track_language_; 90 std::string codec_id_; 91 std::vector<uint8> codec_private_; 92 int64 seek_preroll_; 93 int64 codec_delay_; 94 int64 default_duration_; 95 scoped_ptr<WebMContentEncodingsClient> track_content_encodings_client_; 96 97 int64 audio_track_num_; 98 int64 audio_default_duration_; 99 int64 video_track_num_; 100 int64 video_default_duration_; 101 bool ignore_text_tracks_; 102 TextTracks text_tracks_; 103 std::set<int64> ignored_tracks_; 104 std::string audio_encryption_key_id_; 105 std::string video_encryption_key_id_; 106 LogCB log_cb_; 107 108 WebMAudioClient audio_client_; 109 AudioDecoderConfig audio_decoder_config_; 110 111 WebMVideoClient video_client_; 112 VideoDecoderConfig video_decoder_config_; 113 114 DISALLOW_COPY_AND_ASSIGN(WebMTracksParser); 115 }; 116 117 } // namespace media 118 119 #endif // MEDIA_FORMATS_WEBM_WEBM_TRACKS_PARSER_H_ 120