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// 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_VIDEO_FFMPEG_VIDEO_DECODE_ENGINE_H_
#define MEDIA_VIDEO_FFMPEG_VIDEO_DECODE_ENGINE_H_
#include <deque>
#include "base/scoped_ptr.h"
#include "media/ffmpeg/ffmpeg_common.h"
#include "media/video/video_decode_engine.h"
// FFmpeg types.
struct AVCodecContext;
struct AVFrame;
struct AVStream;
namespace media {
class FFmpegVideoAllocator;
class FFmpegVideoDecodeEngine : public VideoDecodeEngine {
public:
FFmpegVideoDecodeEngine();
virtual ~FFmpegVideoDecodeEngine();
// Implementation of the VideoDecodeEngine Interface.
virtual void Initialize(MessageLoop* message_loop,
VideoDecodeEngine::EventHandler* event_handler,
const VideoCodecConfig& config);
virtual void EmptyThisBuffer(scoped_refptr<Buffer> buffer);
virtual void FillThisBuffer(scoped_refptr<VideoFrame> frame);
virtual void Uninitialize();
virtual void Flush();
virtual void Seek();
virtual AVCodecContext* codec_context() const { return codec_context_; }
virtual void SetCodecContextForTest(AVCodecContext* context) {
codec_context_ = context;
}
VideoFrame::Format GetSurfaceFormat() const;
private:
void DecodeFrame(scoped_refptr<Buffer> buffer);
void ReadInput();
void TryToFinishPendingFlush();
AVCodecContext* codec_context_;
AVStream* av_stream_;
scoped_ptr_malloc<AVFrame, ScopedPtrAVFree> av_frame_;
VideoDecodeEngine::EventHandler* event_handler_;
// Whether direct rendering is used.
bool direct_rendering_;
// Used when direct rendering is used to recycle output buffers.
scoped_ptr<FFmpegVideoAllocator> allocator_;
// Indicate how many buffers are pending on input port of this filter:
// Increment when engine receive one input packet from demuxer;
// Decrement when engine send one input packet to demuxer;
int pending_input_buffers_;
// Indicate how many buffers are pending on output port of this filter:
// Increment when engine receive one output frame from renderer;
// Decrement when engine send one output frame to renderer;
int pending_output_buffers_;
// Whether end of stream had been reached at output side.
bool output_eos_reached_;
// Used when direct rendering is disabled to hold available output buffers.
std::deque<scoped_refptr<VideoFrame> > frame_queue_available_;
// Whether flush operation is pending.
bool flush_pending_;
DISALLOW_COPY_AND_ASSIGN(FFmpegVideoDecodeEngine);
};
} // namespace media
#endif // MEDIA_VIDEO_FFMPEG_VIDEO_DECODE_ENGINE_H_
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