add components for integration test which will detect breakage of media pipeline with video captu...

media/filters/video_frame_generator.h

+// 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.
+
+#ifndef MEDIA_FILTERS_VIDEO_FRAME_GENERATOR_H_
+#define MEDIA_FILTERS_VIDEO_FRAME_GENERATOR_H_
+
+#include "media/base/filters.h"
+#include "media/base/pipeline_status.h"
+
+namespace base {
+class MessageLoopProxy;
+}
+
+namespace media {
+
+class DemuxerStream;
+class VideoFrame;
+
+// A filter generates raw frames and passes them to media engine as a video
+// decoder filter.
+class MEDIA_EXPORT VideoFrameGenerator
+    : public VideoDecoder {
+ public:
+  VideoFrameGenerator(
+      base::MessageLoopProxy* message_loop_proxy,
+      const gfx::Size& size,
+      const base::TimeDelta& frame_duration);
+  virtual ~VideoFrameGenerator();
+
+  // Filter implementation.
+  virtual void Stop(const base::Closure& callback) OVERRIDE;
+
+  // Decoder implementation.
+  virtual void Initialize(
+      DemuxerStream* demuxer_stream,
+      const PipelineStatusCB& filter_callback,
+      const StatisticsCallback& stat_callback) OVERRIDE;
+  virtual void Read(const ReadCB& callback) OVERRIDE;
+  virtual const gfx::Size& natural_size() OVERRIDE;
+
+ private:
+  void StopOnDecoderThread(const base::Closure& callback);
+
+  void InitializeOnDecoderThread(
+      DemuxerStream* demuxer_stream,
+      const PipelineStatusCB& filter_callback,
+      const StatisticsCallback& stat_callback);
+  void ReadOnDecoderThread(const ReadCB& callback);
+
+  scoped_refptr<base::MessageLoopProxy> message_loop_proxy_;
+  gfx::Size natural_size_;
+  bool stopped_;
+
+  base::TimeDelta current_time_;
+  base::TimeDelta frame_duration_;
+
+  DISALLOW_COPY_AND_ASSIGN(VideoFrameGenerator);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_FILTERS_VIDEO_FRAME_GENERATOR_H_