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"
40 struct AVCodecContext;
41 struct AVFilterContext;
42 struct AVFormatContext;
44 struct AVBufferContext;
54 /** @class FFmpegDecoder
55 * @brief A decoder using FFmpeg to decode content.
57 class FFmpegDecoder : public VideoDecoder, public AudioDecoder
60 FFmpegDecoder (boost::shared_ptr<const Film>, boost::shared_ptr<const FFmpegContent>, bool video, bool audio);
69 Time position () const;
74 float video_frame_rate () const;
75 libdcp::Size video_size () const;
76 ContentVideoFrame video_length () const;
80 std::vector<boost::shared_ptr<FFmpegSubtitleStream> > subtitle_streams () const {
81 return _subtitle_streams;
84 std::vector<boost::shared_ptr<FFmpegAudioStream> > audio_streams () const {
85 return _audio_streams;
88 boost::shared_ptr<const FFmpegContent> ffmpeg_content () const {
89 return _ffmpeg_content;
94 /* No copy construction */
95 FFmpegDecoder (FFmpegDecoder const &);
96 FFmpegDecoder& operator= (FFmpegDecoder const &);
98 PixelFormat pixel_format () const;
99 AVSampleFormat audio_sample_format () const;
100 int bytes_per_audio_sample () const;
101 void do_seek (Time, bool, bool);
103 void setup_general ();
106 void setup_subtitle ();
108 bool decode_video_packet ();
109 void decode_audio_packet ();
111 void maybe_add_subtitle ();
112 boost::shared_ptr<AudioBuffers> deinterleave_audio (uint8_t** data, int size);
114 std::string stream_name (AVStream* s) const;
116 boost::shared_ptr<const FFmpegContent> _ffmpeg_content;
118 AVFormatContext* _format_context;
123 AVCodecContext* _video_codec_context;
124 AVCodec* _video_codec;
125 AVCodecContext* _audio_codec_context; ///< may be 0 if there is no audio
126 AVCodec* _audio_codec; ///< may be 0 if there is no audio
127 AVCodecContext* _subtitle_codec_context; ///< may be 0 if there is no subtitle
128 AVCodec* _subtitle_codec; ///< may be 0 if there is no subtitle
132 std::list<boost::shared_ptr<FilterGraph> > _filter_graphs;
133 boost::mutex _filter_graphs_mutex;
135 std::vector<boost::shared_ptr<FFmpegSubtitleStream> > _subtitle_streams;
136 std::vector<boost::shared_ptr<FFmpegAudioStream> > _audio_streams;
141 /* It would appear (though not completely verified) that one must have
142 a mutex around calls to avcodec_open* and avcodec_close... and here
145 static boost::mutex _mutex;