Convert Filter::Seek() to use new callback system.

media/base/filters.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 "media/base/filters.h"
 
 #include "base/logging.h"
 
 namespace media {
 
+void RunAndResetCB(FilterStatusCB* cb, PipelineStatus status) {
+  DCHECK(cb);
+  FilterStatusCB tmp_cb(*cb);
+  cb->Reset();
+  tmp_cb.Run(status);
+}
+
 Filter::Filter() : host_(NULL) {}
 
 Filter::~Filter() {}
 
 void Filter::set_host(FilterHost* host) {
   DCHECK(host);
   DCHECK(!host_);
   host_ = host;
 }
 
 FilterHost* Filter::host() {
   return host_;
 }
 
 void Filter::Play(FilterCallback* callback) {
   DCHECK(callback);
-  if (callback) {
-    callback->Run();
-    delete callback;
-  }
+  callback->Run();
+  delete callback;
 }
 
 void Filter::Pause(FilterCallback* callback) {
   DCHECK(callback);
-  if (callback) {
-    callback->Run();
-    delete callback;
-  }
+  callback->Run();
+  delete callback;
 }
 
 void Filter::Flush(FilterCallback* callback) {
   DCHECK(callback);
-  if (callback) {
-    callback->Run();
-    delete callback;
-  }
+  callback->Run();
+  delete callback;
 }
 
 void Filter::Stop(FilterCallback* callback) {
   DCHECK(callback);
-  if (callback) {
-    callback->Run();
-    delete callback;
-  }
+  callback->Run();
+  delete callback;
 }
 
 void Filter::SetPlaybackRate(float playback_rate) {}
 
-void Filter::Seek(base::TimeDelta time, FilterCallback* callback) {
-  scoped_ptr<FilterCallback> seek_callback(callback);
-  if (seek_callback.get()) {
-    seek_callback->Run();
-  }
+void Filter::Seek(base::TimeDelta time, const FilterStatusCB& callback) {
+  DCHECK(!callback.is_null());
+  callback.Run(PIPELINE_OK);
 }
 
 void Filter::OnAudioRendererDisabled() {
 }
 
 AVStream* DemuxerStream::GetAVStream() {
   return NULL;
 }
 
 DemuxerStream::~DemuxerStream() {}
 
 VideoDecoder::VideoDecoder() {}
 
 VideoDecoder::~VideoDecoder() {}
 
 AudioDecoder::AudioDecoder() {}
 
 AudioDecoder::~AudioDecoder() {}
 
 void AudioDecoder::ConsumeAudioSamples(scoped_refptr<Buffer> buffer) {
   consume_audio_samples_callback_.Run(buffer);
 }
 
 }  // namespace media