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/message_loop.h"
 #include "base/scoped_ptr.h"
 #include "base/stl_util-inl.h"
 #include "base/string_util.h"
 #include "base/time.h"
 #include "media/base/filter_host.h"
 #include "media/base/limits.h"
 #include "media/base/media_switches.h"
 #include "media/ffmpeg/ffmpeg_common.h"
 #include "media/filters/bitstream_converter.h"
 #include "media/filters/ffmpeg_demuxer.h"
 #include "media/filters/ffmpeg_glue.h"
+#include "webkit/glue/media/defer_strategy.h"
 #include "media/filters/ffmpeg_h264_bitstream_converter.h"
 
 namespace media {
 
 //
 // AVPacketBuffer
 //
 class AVPacketBuffer : public Buffer {
  public:
   AVPacketBuffer(AVPacket* packet, const base::TimeDelta& timestamp,
@@ skipping 274 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) {

[acolwell GONE FROM CHROMIUM, 2011/03/25 04:35:28]

This is necessary because we accidentally broke the existing functionality when
DataSources became owned by the demuxer instead of the CompositeFilter? Just
checking.

If so could you add a unit test to make sure we capture this behavior.

[vrk (LEFT CHROMIUM), 2011/03/25 21:33:32]

Sure, will do!

+  DCHECK(data_source_.get());
+  data_source_->SetPlaybackRate(playback_rate);
+}
+
+void FFmpegDemuxer::SetPreload(media::Preload preload) {

[acolwell GONE FROM CHROMIUM, 2011/03/25 04:35:28]

shouldn't need media::

[vrk (LEFT CHROMIUM), 2011/03/25 21:33:32]

Done.

+  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