media: Allow config change between clear and encrypted streams

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 <sstream>
 #include <string>
@@ skipping 1527 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(ERROR, media_log_) << "Audio codec changes not allowed.";
     return false;
   }
 
-  if (!audio_configs_[0].encryption_scheme().Matches(
-          config.encryption_scheme())) {
-    MEDIA_LOG(ERROR, media_log_) << "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;
     }
   }
 
   // No matches found so let's add this one to the list.
   append_config_index_ = audio_configs_.size();
   DVLOG(2) << "New audio config - index: " << append_config_index_;
   audio_configs_.resize(audio_configs_.size() + 1);
   audio_configs_[append_config_index_] = config;
   return true;
 }
 
 bool SourceBufferStream::UpdateVideoConfig(const VideoDecoderConfig& config) {
   DCHECK(!video_configs_.empty());
   DCHECK(audio_configs_.empty());
   DVLOG(3) << "UpdateVideoConfig.";
 
   if (video_configs_[0].codec() != config.codec()) {
     MEDIA_LOG(ERROR, media_log_) << "Video codec changes not allowed.";
     return false;
   }
 
-  if (!video_configs_[0].encryption_scheme().Matches(
-          config.encryption_scheme())) {
-    MEDIA_LOG(ERROR, media_log_) << "Video encryption changes not allowed.";
-    return false;
-  }
-
   // Check to see if the new config matches an existing one.
   for (size_t i = 0; i < video_configs_.size(); ++i) {
     if (config.Matches(video_configs_[i])) {
       append_config_index_ = i;
       return true;
     }
   }
 
   // No matches found so let's add this one to the list.
   append_config_index_ = video_configs_.size();
@@ skipping 161 matching lines @@
 
   if (!have_preroll_buffer)
     return false;
 
   pending_buffer_.swap(*out_buffer);
   pending_buffers_complete_ = false;
   return true;
 }
 
 }  // namespace media