media: Allow config change between clear and encrypted streams

media/filters/decoder_stream.cc

 // 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.
 
 #include "media/filters/decoder_stream.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 187 matching lines @@
   // (in OnBufferReady()).
   if (pending_demuxer_read_)
     return;
 
   ResetDecoder();
 }
 
 template <DemuxerStream::Type StreamType>
 bool DecoderStream<StreamType>::CanReadWithoutStalling() const {
   DCHECK(task_runner_->BelongsToCurrentThread());
-  return !ready_outputs_.empty() || decoder_->CanReadWithoutStalling();
+  return !ready_outputs_.empty() ||
+         (decoder_ && decoder_->CanReadWithoutStalling());
 }
 
 template <>
 bool DecoderStream<DemuxerStream::AUDIO>::CanReadWithoutStalling() const {
   DCHECK(task_runner_->BelongsToCurrentThread());
   return true;
 }
 
 template <DemuxerStream::Type StreamType>
 int DecoderStream<StreamType>::GetMaxDecodeRequests() const {
@@ skipping 555 matching lines @@
   }
 
   // The resetting process will be continued in OnDecoderReinitialized().
   ReinitializeDecoder();
 }
 
 template class DecoderStream<DemuxerStream::VIDEO>;
 template class DecoderStream<DemuxerStream::AUDIO>;
 
 }  // namespace media