Implementing preload=metadata for video

media/filters/ffmpeg_demuxer.cc

 // Copyright (c) 2011 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 "base/callback.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/stl_util-inl.h"
 #include "base/string_util.h"
@@ skipping 283 matching lines @@
 
 void FFmpegDemuxer::Seek(base::TimeDelta time, FilterCallback* callback) {
   // TODO(hclam): by returning from this method, it is assumed that the seek
   // operation is completed and filters behind the demuxer is good to issue
   // more reads, but we are posting a task here, which makes the seek operation
   // asynchronous, should change how seek works to make it fully asynchronous.
   message_loop_->PostTask(FROM_HERE,
       NewRunnableMethod(this, &FFmpegDemuxer::SeekTask, time, callback));
 }
 
+void FFmpegDemuxer::SetPlaybackRate(float playback_rate) {
+  DCHECK(data_source_.get());
+  data_source_->SetPlaybackRate(playback_rate);
+}
+
+void FFmpegDemuxer::SetPreload(Preload preload) {
+  DCHECK(data_source_.get());
+  data_source_->SetPreload(preload);
+}
+
 void FFmpegDemuxer::OnAudioRendererDisabled() {
   message_loop_->PostTask(FROM_HERE,
       NewRunnableMethod(this, &FFmpegDemuxer::DisableAudioStreamTask));
 }
 
 void FFmpegDemuxer::set_host(FilterHost* filter_host) {
   Demuxer::set_host(filter_host);
   if (data_source_)
     data_source_->set_host(filter_host);
   if (max_duration_.InMicroseconds() >= 0)
@@ skipping 327 matching lines @@
   read_event_.Wait();
   return last_read_bytes_;
 }
 
 void FFmpegDemuxer::SignalReadCompleted(size_t size) {
   last_read_bytes_ = size;
   read_event_.Signal();
 }
 
 }  // namespace media