MSE: Record counts of detected MSE audio, video and text tracks

media/formats/webm/webm_tracks_parser.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_FORMATS_WEBM_WEBM_TRACKS_PARSER_H_
 #define MEDIA_FORMATS_WEBM_WEBM_TRACKS_PARSER_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 60 matching lines @@
   const VideoDecoderConfig& video_decoder_config() {
     return video_decoder_config_;
   }
 
   typedef std::map<int, TextTrackConfig> TextTracks;
 
   const TextTracks& text_tracks() const {
     return text_tracks_;
   }
 
+  int detected_audio_track_count() const { return detected_audio_track_count_; }
+
+  int detected_video_track_count() const { return detected_video_track_count_; }
+
+  int detected_text_track_count() const { return detected_text_track_count_; }
+
   // Note: Calling media_tracks() method passes the ownership of the MediaTracks
   // object from WebMTracksParser to the caller (which is typically
   // WebMStreamParser object). So this method must be called only once, after
   // track parsing has been completed.
   scoped_ptr<MediaTracks> media_tracks() {
     CHECK(media_tracks_.get());
     return std::move(media_tracks_);
   }
 
  private:
   // WebMParserClient implementation.
   WebMParserClient* OnListStart(int id) override;
   bool OnListEnd(int id) override;
   bool OnUInt(int id, int64_t val) override;
   bool OnFloat(int id, double val) override;
   bool OnBinary(int id, const uint8_t* data, int size) override;
   bool OnString(int id, const std::string& str) override;
 
-  int64_t track_type_;
-  int64_t track_num_;
+  int64_t track_type_ = -1;
+  int64_t track_num_ = -1;
   std::string track_name_;
   std::string track_language_;
   std::string codec_id_;
   std::vector<uint8_t> codec_private_;
-  int64_t seek_preroll_;
-  int64_t codec_delay_;
-  int64_t default_duration_;
+  int64_t seek_preroll_ = -1;
+  int64_t codec_delay_ = -1;
+  int64_t default_duration_ = -1;
   scoped_ptr<WebMContentEncodingsClient> track_content_encodings_client_;
 
-  int64_t audio_track_num_;
-  int64_t audio_default_duration_;
-  int64_t video_track_num_;
-  int64_t video_default_duration_;
+  int64_t audio_track_num_ = -1;
+  int64_t audio_default_duration_ = -1;
+  int64_t video_track_num_ = -1;
+  int64_t video_default_duration_ = -1;
   bool ignore_text_tracks_;
   TextTracks text_tracks_;
   std::set<int64_t> ignored_tracks_;
   std::string audio_encryption_key_id_;
   std::string video_encryption_key_id_;
   scoped_refptr<MediaLog> media_log_;
 
   WebMAudioClient audio_client_;
   AudioDecoderConfig audio_decoder_config_;
 
   WebMVideoClient video_client_;
   VideoDecoderConfig video_decoder_config_;
 
+  int detected_audio_track_count_ = 0;
+  int detected_video_track_count_ = 0;
+  int detected_text_track_count_ = 0;
   scoped_ptr<MediaTracks> media_tracks_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMTracksParser);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FORMATS_WEBM_WEBM_TRACKS_PARSER_H_