2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 /** @file src/ffmpeg_decoder.h
21 * @brief A decoder using FFmpeg to decode content.
27 #include <boost/shared_ptr.hpp>
28 #include <boost/optional.hpp>
29 #include <boost/thread/mutex.hpp>
31 #include <libavcodec/avcodec.h>
32 #include <libpostproc/postprocess.h>
36 #include "video_decoder.h"
37 #include "audio_decoder.h"
38 #include "subtitle_decoder.h"
42 class ffmpeg_pts_offset_test;
44 /** @class FFmpegDecoder
45 * @brief A decoder using FFmpeg to decode content.
47 class FFmpegDecoder : public VideoDecoder, public AudioDecoder, public SubtitleDecoder, public FFmpeg
50 FFmpegDecoder (boost::shared_ptr<const Film>, boost::shared_ptr<const FFmpegContent>, bool video, bool audio);
54 void seek (VideoContent::Frame, bool);
58 friend class ::ffmpeg_pts_offset_test;
60 static double compute_pts_offset (double, double, float);
62 void setup_subtitle ();
64 AVSampleFormat audio_sample_format () const;
65 int bytes_per_audio_sample () const;
67 bool decode_video_packet ();
68 void decode_audio_packet ();
69 void decode_subtitle_packet ();
71 void maybe_add_subtitle ();
72 boost::shared_ptr<AudioBuffers> deinterleave_audio (uint8_t** data, int size);
74 AVCodecContext* _subtitle_codec_context; ///< may be 0 if there is no subtitle
75 AVCodec* _subtitle_codec; ///< may be 0 if there is no subtitle
77 std::list<boost::shared_ptr<FilterGraph> > _filter_graphs;
78 boost::mutex _filter_graphs_mutex;
83 double _video_pts_offset;
84 double _audio_pts_offset;