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/*
Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/** @file src/ffmpeg_decoder.h
* @brief A decoder using FFmpeg to decode content.
*/
#include <vector>
#include <string>
#include <stdint.h>
#include <boost/shared_ptr.hpp>
#include <boost/optional.hpp>
#include <boost/thread/mutex.hpp>
extern "C" {
#include <libavcodec/avcodec.h>
}
#include "util.h"
#include "decoder.h"
#include "video_decoder.h"
#include "audio_decoder.h"
#include "subtitle_decoder.h"
#include "ffmpeg.h"
class Film;
class FilterGraph;
class ffmpeg_pts_offset_test;
/** @class FFmpegDecoder
* @brief A decoder using FFmpeg to decode content.
*/
class FFmpegDecoder : public VideoDecoder, public AudioDecoder, public SubtitleDecoder, public FFmpeg
{
public:
FFmpegDecoder (boost::shared_ptr<const Film>, boost::shared_ptr<const FFmpegContent>, bool video, bool audio);
~FFmpegDecoder ();
void pass ();
void seek (VideoContent::Frame, bool);
bool done () const;
private:
friend class ::ffmpeg_pts_offset_test;
static double compute_pts_offset (double, double, float);
void flush ();
void setup_subtitle ();
AVSampleFormat audio_sample_format () const;
int bytes_per_audio_sample () const;
bool decode_video_packet ();
void decode_audio_packet ();
void decode_subtitle_packet ();
void maybe_add_subtitle ();
boost::shared_ptr<AudioBuffers> deinterleave_audio (uint8_t** data, int size);
AVCodecContext* _subtitle_codec_context; ///< may be 0 if there is no subtitle
AVCodec* _subtitle_codec; ///< may be 0 if there is no subtitle
std::list<boost::shared_ptr<FilterGraph> > _filter_graphs;
boost::mutex _filter_graphs_mutex;
bool _decode_video;
bool _decode_audio;
double _pts_offset;
bool _just_sought;
};
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