Create video and audio decoder threads on demand.

webkit/media/filter_helpers.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 "webkit/media/filter_helpers.h"
 
+#include "base/bind.h"
 #include "media/base/filter_collection.h"
 #include "media/base/message_loop_factory.h"
 #include "media/filters/chunk_demuxer_factory.h"
 #include "media/filters/dummy_demuxer_factory.h"
 #include "media/filters/ffmpeg_audio_decoder.h"
 #include "media/filters/ffmpeg_demuxer_factory.h"
 #include "media/filters/ffmpeg_video_decoder.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebURL.h"
 #include "webkit/media/media_stream_client.h"
 
 namespace webkit_media {
 
 // Constructs and adds the default audio/video decoders to |filter_collection|.
 static void AddDefaultDecodersToCollection(
     media::MessageLoopFactory* message_loop_factory,
     media::FilterCollection* filter_collection) {
   filter_collection->AddAudioDecoder(new media::FFmpegAudioDecoder(
-      message_loop_factory->GetMessageLoop("AudioDecoderThread")));
+      base::Bind(&media::MessageLoopFactory::GetMessageLoop,
+                 base::Unretained(message_loop_factory),
+                 "AudioDecoderThread")));
   filter_collection->AddVideoDecoder(new media::FFmpegVideoDecoder(
-      message_loop_factory->GetMessageLoop("VideoDecoderThread")));
+      base::Bind(&media::MessageLoopFactory::GetMessageLoop,
+                 base::Unretained(message_loop_factory),
+                 "VideoDecoderThread")));
 }
 
 bool BuildMediaStreamCollection(const WebKit::WebURL& url,
                                 MediaStreamClient* client,
                                 media::MessageLoopFactory* message_loop_factory,
                                 media::FilterCollection* filter_collection) {
   if (!client)
     return false;
 
   // Remove any "traditional" decoders (e.g. GpuVideoDecoder) from the
@@ skipping 44 matching lines @@
                             media::FilterCollection* filter_collection) {
   scoped_ptr<media::DemuxerFactory> demuxer_factory(
       new media::FFmpegDemuxerFactory(
           data_source, message_loop_factory->GetMessageLoop("PipelineThread")));
   filter_collection->SetDemuxerFactory(demuxer_factory.Pass());
 
   AddDefaultDecodersToCollection(message_loop_factory, filter_collection);
 }
 
 }  // webkit_media