merge video_decoder_impl.cc and ffmpeg_video_decoder.cc

media/filters/video_decoder_impl.h

-// Copyright (c) 2010 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_DECODER_IMPL_H_
-#define MEDIA_FILTERS_VIDEO_DECODER_IMPL_H_
-
-#include "base/time.h"
-#include "media/base/pts_heap.h"
-#include "media/base/video_frame.h"
-#include "media/filters/decoder_base.h"
-#include "testing/gtest/include/gtest/gtest_prod.h"
-
-// FFmpeg types.
-struct AVRational;
-
-namespace media {
-
-class VideoDecodeEngine;
-
-class VideoDecoderImpl : public DecoderBase<VideoDecoder, VideoFrame> {
- protected:
-  VideoDecoderImpl(VideoDecodeEngine* engine);
-
-  // Make this class abstract to document that this class cannot be used
-  // directly as a filter type because it does not implement the static methods
-  // CreateFactory() and IsMediaFormatSupported().
-  //
-  // TODO(ajwong): When we clean up the filters to not required a static
-  // implementation of CreateFactory() and IsMediaFormatSupported(), this
-  // class doesn't probably need to be abstract.
-  virtual ~VideoDecoderImpl() = 0;
-
-  virtual void DoInitialize(DemuxerStream* demuxer_stream, bool* success,
-                            Task* done_cb);
-  virtual void DoSeek(base::TimeDelta time, Task* done_cb);
-  virtual void DoDecode(Buffer* input);
-
- protected:
-  virtual void OnEmptyBufferDone(scoped_refptr<Buffer> buffer);
-
- private:
-  friend class FilterFactoryImpl1<VideoDecoderImpl, VideoDecodeEngine*>;
-  friend class DecoderPrivateMock;
-  friend class VideoDecoderImplTest;
-  FRIEND_TEST(VideoDecoderImplTest, FindPtsAndDuration);
-  FRIEND_TEST(VideoDecoderImplTest, DoDecode_EnqueueVideoFrameError);
-  FRIEND_TEST(VideoDecoderImplTest, DoDecode_FinishEnqueuesEmptyFrames);
-  FRIEND_TEST(VideoDecoderImplTest, DoDecode_TestStateTransition);
-  FRIEND_TEST(VideoDecoderImplTest, DoSeek);
-
-  // The TimeTuple struct is used to hold the needed timestamp data needed for
-  // enqueuing a video frame.
-  struct TimeTuple {
-    base::TimeDelta timestamp;
-    base::TimeDelta duration;
-  };
-
-  enum DecoderState {
-    kNormal,
-    kFlushCodec,
-    kDecodeFinished,
-  };
-
-  // Implement DecoderBase template methods.
-  virtual void EnqueueVideoFrame(const scoped_refptr<VideoFrame>& video_frame);
-
-  // Create an empty video frame and queue it.
-  virtual void EnqueueEmptyFrame();
-
-  // Methods that pickup after the decode engine has finished its action.
-  virtual void OnInitializeComplete(bool* success /* Not owned */,
-                                    Task* done_cb);
-
-  virtual void OnDecodeComplete(scoped_refptr<VideoFrame> video_frame);
-
-  // Attempt to get the PTS and Duration for this frame by examining the time
-  // info provided via packet stream (stored in |pts_heap|), or the info
-  // writen into the AVFrame itself.  If no data is available in either, then
-  // attempt to generate a best guess of the pts based on the last known pts.
-  //
-  // Data inside the AVFrame (if provided) is trusted the most, followed
-  // by data from the packet stream.  Estimation based on the |last_pts| is
-  // reserved as a last-ditch effort.
-  virtual TimeTuple FindPtsAndDuration(const AVRational& time_base,
-                                       PtsHeap* pts_heap,
-                                       const TimeTuple& last_pts,
-                                       const VideoFrame* frame);
-
-  // Signals the pipeline that a decode error occurs, and moves the decoder
-  // into the kDecodeFinished state.
-  virtual void SignalPipelineError();
-
-  // Injection point for unittest to provide a mock engine.  Takes ownership of
-  // the provided engine.
-  virtual void SetVideoDecodeEngineForTest(VideoDecodeEngine* engine);
-
-  size_t width_;
-  size_t height_;
-
-  PtsHeap pts_heap_;  // Heap of presentation timestamps.
-  TimeTuple last_pts_;
-  scoped_ptr<AVRational> time_base_;  // Pointer to avoid needing full type.
-  DecoderState state_;
-  scoped_ptr<VideoDecodeEngine> decode_engine_;
-
-  DISALLOW_COPY_AND_ASSIGN(VideoDecoderImpl);
-};
-
-}  // namespace media
-
-#endif  // MEDIA_FILTERS_VIDEO_DECODER_IMPL_H_