Basic media tracks implementation for media stream parsers

media/formats/mp4/mp4_stream_parser.cc

Index: media/formats/mp4/mp4_stream_parser.cc
diff --git a/media/formats/mp4/mp4_stream_parser.cc b/media/formats/mp4/mp4_stream_parser.cc
index 7becdf941019ffca0378baf9e08a9702957f35cc..c04ee86df6603ade543de2e5055969419ccff7ed 100644
--- a/media/formats/mp4/mp4_stream_parser.cc
+++ b/media/formats/mp4/mp4_stream_parser.cc
@@ -14,6 +14,7 @@
 #include "base/time/time.h"
 #include "build/build_config.h"
 #include "media/base/audio_decoder_config.h"
+#include "media/base/media_tracks.h"
 #include "media/base/stream_parser_buffer.h"
 #include "media/base/text_track_config.h"
 #include "media/base/timestamp_constants.h"
@@ -353,7 +354,14 @@ bool MP4StreamParser::ParseMoov(BoxReader* reader) {
   if (!moov_->pssh.empty())
     OnEncryptedMediaInitData(moov_->pssh);
 
-  RCHECK(config_cb_.Run(audio_config, video_config, TextTrackConfigMap()));
+  scoped_ptr<MediaTracks> media_tracks(new MediaTracks());

[wolenetz, 2016/02/26 00:06:21]

ditto: TODO+crbug for sourcing inband track metadata, this time for mp4-isobmff
(https://dev.w3.org/html5/html-sourcing-inband-tracks/#mpeg4)

[servolk, 2016/02/26 01:56:33]

Done.

+  if (audio_config.IsValidConfig()) {
+    media_tracks->AddAudioTrack(audio_config, "audio", "", "", "");
+  }
+  if (video_config.IsValidConfig()) {
+    media_tracks->AddVideoTrack(video_config, "video", "", "", "");
+  }
+  RCHECK(config_cb_.Run(std::move(media_tracks), TextTrackConfigMap()));
 
   StreamParser::InitParameters params(kInfiniteDuration());
   if (moov_->extends.header.fragment_duration > 0) {