1 /* -*- c-basic-offset: 8; default-tab-width: 8; -*- */
4 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 /** @file src/ffmpeg_decoder.h
23 * @brief A decoder using FFmpeg to decode content.
29 #include <boost/shared_ptr.hpp>
30 #include <boost/optional.hpp>
31 #include <boost/thread/mutex.hpp>
33 #include <libavcodec/avcodec.h>
34 #include <libpostproc/postprocess.h>
38 #include "video_decoder.h"
39 #include "audio_decoder.h"
42 struct AVCodecContext;
43 struct AVFilterContext;
44 struct AVFormatContext;
46 struct AVBufferContext;
56 /** @class FFmpegDecoder
57 * @brief A decoder using FFmpeg to decode content.
59 class FFmpegDecoder : public VideoDecoder, public AudioDecoder
62 FFmpegDecoder (boost::shared_ptr<const Film>, boost::shared_ptr<const FFmpegContent>, bool video, bool audio);
76 float video_frame_rate () const;
77 libdcp::Size video_size () const;
78 ContentVideoFrame video_length () const;
82 std::vector<boost::shared_ptr<FFmpegSubtitleStream> > subtitle_streams () const {
83 return _subtitle_streams;
86 std::vector<boost::shared_ptr<FFmpegAudioStream> > audio_streams () const {
87 return _audio_streams;
90 boost::shared_ptr<const FFmpegContent> ffmpeg_content () const {
91 return _ffmpeg_content;
96 /* No copy construction */
97 FFmpegDecoder (FFmpegDecoder const &);
98 FFmpegDecoder& operator= (FFmpegDecoder const &);
100 PixelFormat pixel_format () const;
101 AVSampleFormat audio_sample_format () const;
102 int bytes_per_audio_sample () const;
103 void do_seek (Time, bool, bool);
105 void setup_general ();
108 void setup_subtitle ();
110 bool decode_video_packet ();
111 void decode_audio_packet ();
113 void maybe_add_subtitle ();
114 boost::shared_ptr<AudioBuffers> deinterleave_audio (uint8_t** data, int size);
116 std::string stream_name (AVStream* s) const;
118 boost::shared_ptr<const FFmpegContent> _ffmpeg_content;
120 AVFormatContext* _format_context;
125 AVCodecContext* _video_codec_context;
126 AVCodec* _video_codec;
127 AVCodecContext* _audio_codec_context; ///< may be 0 if there is no audio
128 AVCodec* _audio_codec; ///< may be 0 if there is no audio
129 AVCodecContext* _subtitle_codec_context; ///< may be 0 if there is no subtitle
130 AVCodec* _subtitle_codec; ///< may be 0 if there is no subtitle
134 std::list<boost::shared_ptr<FilterGraph> > _filter_graphs;
135 boost::mutex _filter_graphs_mutex;
137 std::vector<boost::shared_ptr<FFmpegSubtitleStream> > _subtitle_streams;
138 std::vector<boost::shared_ptr<FFmpegAudioStream> > _audio_streams;
143 /* It would appear (though not completely verified) that one must have
144 a mutex around calls to avcodec_open* and avcodec_close... and here
147 static boost::mutex _mutex;