Remove reference counting from media::Demuxer and friends.

webkit/media/webmediaplayer_impl.cc

Index: webkit/media/webmediaplayer_impl.cc
diff --git a/webkit/media/webmediaplayer_impl.cc b/webkit/media/webmediaplayer_impl.cc
index 98cc5def31f0af439a2f730f9081dabb6565e178..6292e7c31a3d640c3e58144dd5d3d0e6e9a504bf 100644
--- a/webkit/media/webmediaplayer_impl.cc
+++ b/webkit/media/webmediaplayer_impl.cc
@@ -153,6 +153,7 @@ WebMediaPlayerImpl::WebMediaPlayerImpl(
       is_local_source_(false),
       supports_save_(true),
       starting_(false),
+      chunk_demuxer_(NULL),
       pending_repaint_(false),
       video_frame_provider_client_(NULL) {
   media_log_->AddEvent(
@@ -270,14 +271,8 @@ void WebMediaPlayerImpl::load(const WebKit::WebURL& url,
   LoadSetup(url);
 
   // Media source pipelines can start immediately.
-  chunk_demuxer_ = new media::ChunkDemuxer(
-      BIND_TO_RENDER_LOOP_1(&WebMediaPlayerImpl::OnDemuxerOpened,
-                            base::Passed(&ms)),
-      BIND_TO_RENDER_LOOP_2(&WebMediaPlayerImpl::OnNeedKey, "", ""),
-      base::Bind(&LogMediaSourceError, media_log_));
-
   supports_save_ = false;
-  StartPipeline();
+  StartPipeline(media_source);
 }
 
 void WebMediaPlayerImpl::LoadSetup(const WebKit::WebURL& url) {
@@ -1112,7 +1107,7 @@ void WebMediaPlayerImpl::DataSourceInitialized(const GURL& gurl, bool success) {
     return;
   }
 
-  StartPipeline();
+  StartPipeline(NULL);
 }
 
 void WebMediaPlayerImpl::NotifyDownloading(bool is_downloading) {
@@ -1126,10 +1121,96 @@ void WebMediaPlayerImpl::NotifyDownloading(bool is_downloading) {
           "is_downloading_data", is_downloading));
 }
 
-void WebMediaPlayerImpl::StartPipeline() {
+void WebMediaPlayerImpl::StartPipeline(WebKit::WebMediaSource* media_source) {
+  const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
+
+  scoped_ptr<media::FilterCollection> filter_collection(
+      new media::FilterCollection());
+
+  // Figure out which demuxer to use.
+  scoped_ptr<media::Demuxer> demuxer;
+  if (!media_source) {
+    DCHECK(!chunk_demuxer_);
+    DCHECK(data_source_);
+
+    demuxer.reset(new media::FFmpegDemuxer(
+        media_thread_.message_loop_proxy(), data_source_,
+        BIND_TO_RENDER_LOOP_2(&WebMediaPlayerImpl::OnNeedKey, "", "")));
+  } else {
+    DCHECK(!chunk_demuxer_);
+    DCHECK(!data_source_);
+
+    scoped_ptr<WebKit::WebMediaSource> ms(media_source);
+    chunk_demuxer_ = new media::ChunkDemuxer(
+        BIND_TO_RENDER_LOOP_1(&WebMediaPlayerImpl::OnDemuxerOpened,
+                              base::Passed(&ms)),
+        BIND_TO_RENDER_LOOP_2(&WebMediaPlayerImpl::OnNeedKey, "", ""),
+        base::Bind(&LogMediaSourceError, media_log_));
+    demuxer.reset(chunk_demuxer_);
+
+    // Disable GpuVideoDecoder creation until it supports codec config changes.
+    // TODO(acolwell): Remove this once http://crbug.com/151045 is fixed.
+    gpu_factories_ = NULL;
+  }
+  filter_collection->SetDemuxer(demuxer.Pass());
+
+  // Figure out if EME is enabled.
+  media::SetDecryptorReadyCB set_decryptor_ready_cb;
+  if (decryptor_) {
+    set_decryptor_ready_cb = base::Bind(&ProxyDecryptor::SetDecryptorReadyCB,
+                                        base::Unretained(decryptor_.get()));
+  }
+
+  // Create our audio decoders and renderer.
+  ScopedVector<media::AudioDecoder> audio_decoders;
+  audio_decoders.push_back(new media::FFmpegAudioDecoder(
+      media_thread_.message_loop_proxy()));
+  if (cmd_line->HasSwitch(switches::kEnableOpusPlayback)) {
+    audio_decoders.push_back(new media::OpusAudioDecoder(
+        media_thread_.message_loop_proxy()));
+  }
+
+  scoped_ptr<media::AudioRenderer> audio_renderer(
+      new media::AudioRendererImpl(media_thread_.message_loop_proxy(),
+                                   audio_source_provider_,
+                                   audio_decoders.Pass(),
+                                   set_decryptor_ready_cb));
+  filter_collection->SetAudioRenderer(audio_renderer.Pass());
+
+  // Create our video decoders and renderer.
+  ScopedVector<media::VideoDecoder> video_decoders;
+
+  if (gpu_factories_) {
+    video_decoders.push_back(new media::GpuVideoDecoder(
+        media_thread_.message_loop_proxy(), gpu_factories_));
+  }
+
+  video_decoders.push_back(new media::FFmpegVideoDecoder(
+      media_thread_.message_loop_proxy()));
+
+  // TODO(phajdan.jr): Remove ifdefs when libvpx with vp9 support is released
+  // (http://crbug.com/174287) .
+#if !defined(MEDIA_DISABLE_LIBVPX)
+  if (cmd_line->HasSwitch(switches::kEnableVp9Playback)) {
+    video_decoders.push_back(new media::VpxVideoDecoder(
+        media_thread_.message_loop_proxy()));
+  }
+#endif  // !defined(MEDIA_DISABLE_LIBVPX)
+
+  scoped_ptr<media::VideoRenderer> video_renderer(
+      new media::VideoRendererBase(
+          media_thread_.message_loop_proxy(),
+          video_decoders.Pass(),
+          set_decryptor_ready_cb,
+          base::Bind(&WebMediaPlayerImpl::FrameReady, base::Unretained(this)),
+          BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::SetOpaque),
+          true));
+  filter_collection->SetVideoRenderer(video_renderer.Pass());
+
+  // ... and we're ready to go!
   starting_ = true;
   pipeline_->Start(
-      BuildFilterCollection(),
+      filter_collection.Pass(),
       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineEnded),
       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineError),
       BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::OnPipelineSeek),
@@ -1165,8 +1246,10 @@ void WebMediaPlayerImpl::Destroy() {
   // Abort any pending IO so stopping the pipeline doesn't get blocked.
   if (data_source_)
     data_source_->Abort();
-  if (chunk_demuxer_)
+  if (chunk_demuxer_) {
     chunk_demuxer_->Shutdown();
+    chunk_demuxer_ = NULL;
+  }
 
   if (gpu_factories_) {
     gpu_factories_->Abort();
@@ -1190,7 +1273,6 @@ void WebMediaPlayerImpl::Destroy() {
 
   // Release any final references now that everything has stopped.
   data_source_ = NULL;
-  chunk_demuxer_ = NULL;
 }
 
 WebKit::WebMediaPlayerClient* WebMediaPlayerImpl::GetClient() {
@@ -1240,82 +1322,4 @@ void WebMediaPlayerImpl::FrameReady(
       &WebMediaPlayerImpl::Repaint, AsWeakPtr()));
 }
 
-scoped_ptr<media::FilterCollection>
-WebMediaPlayerImpl::BuildFilterCollection() {
-  const CommandLine* cmd_line = CommandLine::ForCurrentProcess();
-
-  scoped_ptr<media::FilterCollection> filter_collection(
-      new media::FilterCollection());
-
-  // Figure out which demuxer to use.
-  if (data_source_) {
-    DCHECK(!chunk_demuxer_);
-    filter_collection->SetDemuxer(new media::FFmpegDemuxer(
-        media_thread_.message_loop_proxy(), data_source_,
-        BIND_TO_RENDER_LOOP_2(&WebMediaPlayerImpl::OnNeedKey, "", "")));
-  } else {
-    DCHECK(chunk_demuxer_);
-    filter_collection->SetDemuxer(chunk_demuxer_);
-
-    // Disable GpuVideoDecoder creation until it supports codec config changes.
-    // TODO(acolwell): Remove this once http://crbug.com/151045 is fixed.
-    gpu_factories_ = NULL;
-  }
-
-  // Figure out if EME is enabled.
-  media::SetDecryptorReadyCB set_decryptor_ready_cb;
-  if (decryptor_) {
-    set_decryptor_ready_cb = base::Bind(&ProxyDecryptor::SetDecryptorReadyCB,
-                                        base::Unretained(decryptor_.get()));
-  }
-
-  // Create our audio decoders and renderer.
-  ScopedVector<media::AudioDecoder> audio_decoders;
-  audio_decoders.push_back(new media::FFmpegAudioDecoder(
-      media_thread_.message_loop_proxy()));
-  if (cmd_line->HasSwitch(switches::kEnableOpusPlayback)) {
-    audio_decoders.push_back(new media::OpusAudioDecoder(
-        media_thread_.message_loop_proxy()));
-  }
-
-  scoped_ptr<media::AudioRenderer> audio_renderer(
-      new media::AudioRendererImpl(media_thread_.message_loop_proxy(),
-                                   audio_source_provider_,
-                                   audio_decoders.Pass(),
-                                   set_decryptor_ready_cb));
-  filter_collection->SetAudioRenderer(audio_renderer.Pass());
-
-  // Create our video decoders and renderer.
-  ScopedVector<media::VideoDecoder> video_decoders;
-
-  if (gpu_factories_) {
-    video_decoders.push_back(new media::GpuVideoDecoder(
-        media_thread_.message_loop_proxy(), gpu_factories_));
-  }
-
-  video_decoders.push_back(new media::FFmpegVideoDecoder(
-      media_thread_.message_loop_proxy()));
-
-  // TODO(phajdan.jr): Remove ifdefs when libvpx with vp9 support is released
-  // (http://crbug.com/174287) .
-#if !defined(MEDIA_DISABLE_LIBVPX)
-  if (cmd_line->HasSwitch(switches::kEnableVp9Playback)) {
-    video_decoders.push_back(new media::VpxVideoDecoder(
-        media_thread_.message_loop_proxy()));
-  }
-#endif  // !defined(MEDIA_DISABLE_LIBVPX)
-
-  scoped_ptr<media::VideoRenderer> video_renderer(
-      new media::VideoRendererBase(
-          media_thread_.message_loop_proxy(),
-          video_decoders.Pass(),
-          set_decryptor_ready_cb,
-          base::Bind(&WebMediaPlayerImpl::FrameReady, base::Unretained(this)),
-          BIND_TO_RENDER_LOOP(&WebMediaPlayerImpl::SetOpaque),
-          true));
-  filter_collection->SetVideoRenderer(video_renderer.Pass());
-
-  return filter_collection.Pass();
-}
-
 }  // namespace webkit_media