Render inband text tracks in the media pipeline

media/filters/source_buffer_stream.cc

 // Copyright (c) 2012 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.
 
 #include "media/filters/source_buffer_stream.h"
 
 #include <algorithm>
 #include <map>
 
 #include "base/bind.h"
@@ skipping 350 matching lines @@
       last_appended_buffer_timestamp_(kNoTimestamp()),
       last_appended_buffer_is_keyframe_(false),
       last_output_buffer_timestamp_(kNoTimestamp()),
       max_interbuffer_distance_(kNoTimestamp()),
       memory_limit_(kDefaultVideoMemoryLimit),
       config_change_pending_(false) {
   DCHECK(video_config.IsValidConfig());
   video_configs_.push_back(video_config);
 }
 
+SourceBufferStream::SourceBufferStream(const TextTrackConfig& text_config,
+                                       const LogCB& log_cb)
+    : log_cb_(log_cb),
+      current_config_index_(0),
+      append_config_index_(0),
+      text_track_config_(text_config),
+      seek_pending_(false),
+      end_of_stream_(false),
+      seek_buffer_timestamp_(kNoTimestamp()),
+      selected_range_(NULL),
+      media_segment_start_time_(kNoTimestamp()),
+      range_for_next_append_(ranges_.end()),
+      new_media_segment_(false),
+      last_appended_buffer_timestamp_(kNoTimestamp()),
+      last_appended_buffer_is_keyframe_(false),
+      last_output_buffer_timestamp_(kNoTimestamp()),
+      max_interbuffer_distance_(kNoTimestamp()),
+      memory_limit_(kDefaultAudioMemoryLimit),
+      config_change_pending_(false) {
+}
+
 SourceBufferStream::~SourceBufferStream() {
   while (!ranges_.empty()) {
     delete ranges_.front();
     ranges_.pop_front();
   }
 }
 
 void SourceBufferStream::OnNewMediaSegment(
     base::TimeDelta media_segment_start_time) {
   DCHECK(!end_of_stream_);
@@ skipping 827 matching lines @@
     CompleteConfigChange();
   return audio_configs_[current_config_index_];
 }
 
 const VideoDecoderConfig& SourceBufferStream::GetCurrentVideoDecoderConfig() {
   if (config_change_pending_)
     CompleteConfigChange();
   return video_configs_[current_config_index_];
 }
 
+const TextTrackConfig& SourceBufferStream::GetCurrentTextTrackConfig() {
+  return text_track_config_;
+}
+
 base::TimeDelta SourceBufferStream::GetMaxInterbufferDistance() const {
   if (max_interbuffer_distance_ == kNoTimestamp())
     return base::TimeDelta::FromMilliseconds(kDefaultBufferDurationInMs);
   return max_interbuffer_distance_;
 }
 
 bool SourceBufferStream::UpdateAudioConfig(const AudioDecoderConfig& config) {
   DCHECK(!audio_configs_.empty());
   DCHECK(video_configs_.empty());
   DVLOG(3) << "UpdateAudioConfig.";
@@ skipping 724 matching lines @@
   return ComputeFudgeRoom(GetApproximateDuration());
 }
 
 base::TimeDelta SourceBufferRange::GetApproximateDuration() const {
   base::TimeDelta max_interbuffer_distance = interbuffer_distance_cb_.Run();
   DCHECK(max_interbuffer_distance != kNoTimestamp());
   return max_interbuffer_distance;
 }
 
 }  // namespace media