Add support for midstream audio configuration changes.

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 1334 matching lines @@
 bool SourceBufferStream::UpdateAudioConfig(const AudioDecoderConfig& config) {
   DCHECK(!audio_configs_.empty());
   DCHECK(video_configs_.empty());
   DVLOG(3) << "UpdateAudioConfig.";
 
   if (audio_configs_[0].codec() != config.codec()) {
     MEDIA_LOG(log_cb_) << "Audio codec changes not allowed.";
     return false;
   }
 
-  if (audio_configs_[0].samples_per_second() != config.samples_per_second()) {
-    MEDIA_LOG(log_cb_) << "Audio sample rate changes not allowed.";
-    return false;
-  }
-
-  if (audio_configs_[0].channel_layout() != config.channel_layout()) {
-    MEDIA_LOG(log_cb_) << "Audio channel layout changes not allowed.";
-    return false;
-  }
-
-  if (audio_configs_[0].bits_per_channel() != config.bits_per_channel()) {
-    MEDIA_LOG(log_cb_) << "Audio bits per channel changes not allowed.";
-    return false;
-  }
-
   if (audio_configs_[0].is_encrypted() != config.is_encrypted()) {
     MEDIA_LOG(log_cb_) << "Audio encryption changes not allowed.";
     return false;
   }
 
   // Check to see if the new config matches an existing one.
   for (size_t i = 0; i < audio_configs_.size(); ++i) {
     if (config.Matches(audio_configs_[i])) {
       append_config_index_ = i;
       return true;
@@ skipping 807 matching lines @@
     if (buffer->end_of_stream() || buffer->timestamp() >= end)
       break;
     if (buffer->timestamp() + buffer->duration() <= start)
       continue;
     buffers->push_back(buffer);
   }
   return previous_size < buffers->size();
 }
 
 }  // namespace media