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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 <libpostproc/postprocess.h>
}
#include "util.h"
#include "decoder.h"
#include "video_decoder.h"
#include "audio_decoder.h"
#include "film.h"
#include "ffmpeg_content.h"
struct AVFilterGraph;
struct AVCodecContext;
struct AVFilterContext;
struct AVFormatContext;
struct AVFrame;
struct AVBufferContext;
struct AVCodec;
struct AVStream;
class Job;
class Options;
class Image;
class Log;
/** @class FFmpegDecoder
* @brief A decoder using FFmpeg to decode content.
*/
class FFmpegDecoder : public VideoDecoder, public AudioDecoder
{
public:
FFmpegDecoder (boost::shared_ptr<const Film>, boost::shared_ptr<const FFmpegContent>, bool video, bool audio, bool subtitles);
~FFmpegDecoder ();
float video_frame_rate () const;
libdcp::Size native_size () const;
ContentVideoFrame video_length () const;
int time_base_numerator () const;
int time_base_denominator () const;
int sample_aspect_ratio_numerator () const;
int sample_aspect_ratio_denominator () const;
std::vector<FFmpegSubtitleStream> subtitle_streams () const {
return _subtitle_streams;
}
std::vector<FFmpegAudioStream> audio_streams () const {
return _audio_streams;
}
bool seek (double);
bool seek_forward ();
bool seek_back ();
bool pass ();
private:
/* No copy construction */
FFmpegDecoder (FFmpegDecoder const &);
FFmpegDecoder& operator= (FFmpegDecoder const &);
PixelFormat pixel_format () const;
AVSampleFormat audio_sample_format () const;
int bytes_per_audio_sample () const;
bool do_seek (double, bool, bool);
void setup_general ();
void setup_video ();
void setup_audio ();
void setup_subtitle ();
bool decode_video_packet ();
void decode_audio_packet ();
void maybe_add_subtitle ();
boost::shared_ptr<AudioBuffers> deinterleave_audio (uint8_t** data, int size);
void film_changed (Film::Property);
std::string stream_name (AVStream* s) const;
boost::shared_ptr<const FFmpegContent> _ffmpeg_content;
AVFormatContext* _format_context;
int _video_stream;
AVFrame* _frame;
AVCodecContext* _video_codec_context;
AVCodec* _video_codec;
AVCodecContext* _audio_codec_context; ///< may be 0 if there is no audio
AVCodec* _audio_codec; ///< may be 0 if there is no audio
AVCodecContext* _subtitle_codec_context; ///< may be 0 if there is no subtitle
AVCodec* _subtitle_codec; ///< may be 0 if there is no subtitle
AVPacket _packet;
std::list<boost::shared_ptr<FilterGraph> > _filter_graphs;
boost::mutex _filter_graphs_mutex;
std::vector<FFmpegSubtitleStream> _subtitle_streams;
std::vector<FFmpegAudioStream> _audio_streams;
bool _decode_video;
bool _decode_audio;
bool _decode_subtitles;
/* It would appear (though not completely verified) that one must have
a mutex around calls to avcodec_open* and avcodec_close... and here
it is.
*/
static boost::mutex _mutex;
};
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