media: Implement zero-copy video playback for ffmpeg.

media/filters/ffmpeg_video_decoder.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_FFMPEG_VIDEO_DECODER_H_
 #define MEDIA_FILTERS_FFMPEG_VIDEO_DECODER_H_
 
 #include <list>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/threading/thread_checker.h"
 #include "media/base/video_decoder.h"
 #include "media/base/video_decoder_config.h"
-#include "media/base/video_frame_pool.h"
 #include "media/ffmpeg/ffmpeg_deleters.h"
 
 struct AVCodecContext;
 struct AVFrame;
 
 namespace base {
 class SingleThreadTaskRunner;
 }
 
 namespace media {
 
 class DecoderBuffer;
+class GpuMemoryBufferVideoFramePool;
+class HybridVideoFramePool;
 
 class MEDIA_EXPORT FFmpegVideoDecoder : public VideoDecoder {
  public:
   static bool IsCodecSupported(VideoCodec codec);
 
   FFmpegVideoDecoder();
+  explicit FFmpegVideoDecoder(
+      std::unique_ptr<GpuMemoryBufferVideoFramePool> gpu_video_frame_pool);
   ~FFmpegVideoDecoder() override;
 
   // Allow decoding of individual NALU. Entire frames are required by default.
   // Disables low-latency mode. Must be called before Initialize().
   void set_decode_nalus(bool decode_nalus) { decode_nalus_ = decode_nalus; }
 
   // VideoDecoder implementation.
   std::string GetDisplayName() const override;
   void Initialize(const VideoDecoderConfig& config,
                   bool low_delay,
@@ skipping 36 matching lines @@
   DecoderState state_;
 
   OutputCB output_cb_;
 
   // FFmpeg structures owned by this object.
   scoped_ptr<AVCodecContext, ScopedPtrAVFreeContext> codec_context_;
   scoped_ptr<AVFrame, ScopedPtrAVFreeFrame> av_frame_;
 
   VideoDecoderConfig config_;
 
-  VideoFramePool frame_pool_;
+  std::unique_ptr<HybridVideoFramePool> hybrid_frame_pool_;
 
   bool decode_nalus_;
 
   DISALLOW_COPY_AND_ASSIGN(FFmpegVideoDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FFMPEG_VIDEO_DECODER_H_