ffmpeg_video_decoder.h revision c2e0dbddbe15c98d52c4786dac06cb8952a8ae6d
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef MEDIA_FILTERS_FFMPEG_VIDEO_DECODER_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define MEDIA_FILTERS_FFMPEG_VIDEO_DECODER_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 82a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include <list> 92a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/callback.h" 11c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)#include "base/memory/weak_ptr.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/base/demuxer_stream.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "media/base/video_decoder.h" 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)struct AVCodecContext; 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)struct AVFrame; 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class MessageLoopProxy; 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace media { 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class DecoderBuffer; 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class MEDIA_EXPORT FFmpegVideoDecoder : public VideoDecoder { 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) explicit FFmpegVideoDecoder( 292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const scoped_refptr<base::MessageLoopProxy>& message_loop); 30c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) virtual ~FFmpegVideoDecoder(); 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // VideoDecoder implementation. 33c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) virtual void Initialize(DemuxerStream* stream, 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const PipelineStatusCB& status_cb, 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const StatisticsCB& statistics_cb) OVERRIDE; 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void Read(const ReadCB& read_cb) OVERRIDE; 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void Reset(const base::Closure& closure) OVERRIDE; 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void Stop(const base::Closure& closure) OVERRIDE; 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Callback called from within FFmpeg to allocate a buffer based on 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the dimensions of |codec_context|. See AVCodecContext.get_buffer 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // documentation inside FFmpeg. 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int GetVideoBuffer(AVCodecContext *codec_context, AVFrame* frame); 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) enum DecoderState { 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) kUninitialized, 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) kNormal, 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) kFlushCodec, 50c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) kDecodeFinished, 51c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) kError 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) }; 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 542a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Reads from the demuxer stream and corresponding read callback. 552a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) void ReturnFrameOrReadFromDemuxerStream(); 562a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) void BufferReady(DemuxerStream::Status status, 572a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const scoped_refptr<DecoderBuffer>& buffer); 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 592a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) // Handles decoding an unencrypted encoded buffer. 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void DecodeBuffer(const scoped_refptr<DecoderBuffer>& buffer); 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool Decode(const scoped_refptr<DecoderBuffer>& buffer, 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) scoped_refptr<VideoFrame>* video_frame); 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Handles (re-)initializing the decoder with a (new) config. 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Returns true if initialization was successful. 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool ConfigureDecoder(); 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Releases resources associated with |codec_context_| and |av_frame_| 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // and resets them to NULL. 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void ReleaseFFmpegResources(); 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Reset decoder and call |reset_cb_|. 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void DoReset(); 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) scoped_refptr<base::MessageLoopProxy> message_loop_; 76c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::WeakPtrFactory<FFmpegVideoDecoder> weak_factory_; 77c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) base::WeakPtr<FFmpegVideoDecoder> weak_this_; 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DecoderState state_; 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StatisticsCB statistics_cb_; 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ReadCB read_cb_; 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Closure reset_cb_; 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // FFmpeg structures owned by this object. 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AVCodecContext* codec_context_; 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AVFrame* av_frame_; 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Pointer to the demuxer stream that will feed us compressed buffers. 91c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) DemuxerStream* demuxer_stream_; 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) std::list<scoped_refptr<VideoFrame> > decoded_frames_; 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(FFmpegVideoDecoder); 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace media 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // MEDIA_FILTERS_FFMPEG_VIDEO_DECODER_H_ 101