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/*
Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file src/ffmpeg_decoder.h
* @brief A decoder using FFmpeg to decode content.
*/
#include "util.h"
#include "decoder.h"
#include "ffmpeg.h"
extern "C" {
#include <libavcodec/avcodec.h>
}
#include <boost/shared_ptr.hpp>
#include <boost/thread/mutex.hpp>
#include <stdint.h>
class Log;
class VideoFilterGraph;
class FFmpegAudioStream;
class AudioBuffers;
class Image;
struct ffmpeg_pts_offset_test;
/** @class FFmpegDecoder
* @brief A decoder using FFmpeg to decode content.
*/
class FFmpegDecoder : public FFmpeg, public Decoder
{
public:
FFmpegDecoder (boost::shared_ptr<const Film> film, boost::shared_ptr<const FFmpegContent>, bool fast);
bool pass ();
void seek (ContentTime time, bool);
private:
friend struct ::ffmpeg_pts_offset_test;
void flush ();
AVSampleFormat audio_sample_format (boost::shared_ptr<FFmpegAudioStream> stream) const;
int bytes_per_audio_sample (boost::shared_ptr<FFmpegAudioStream> stream) const;
bool decode_video_packet ();
void decode_audio_packet ();
void decode_subtitle_packet ();
void decode_bitmap_subtitle (AVSubtitleRect const * rect, ContentTime from);
void decode_ass_subtitle (std::string ass, ContentTime from);
void maybe_add_subtitle ();
boost::shared_ptr<AudioBuffers> deinterleave_audio (boost::shared_ptr<FFmpegAudioStream> stream) const;
std::list<boost::shared_ptr<VideoFilterGraph> > _filter_graphs;
boost::mutex _filter_graphs_mutex;
ContentTime _pts_offset;
boost::optional<ContentTime> _current_subtitle_to;
/** true if we have a subtitle which has not had emit_stop called for it yet */
bool _have_current_subtitle;
boost::shared_ptr<Image> _black_image;
std::vector<boost::optional<ContentTime> > _next_time;
};
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