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>
29 #include <libavcodec/avcodec.h>
30 #include <libpostproc/postprocess.h>
36 struct AVCodecContext;
37 struct AVFilterContext;
38 struct AVFormatContext;
40 struct AVBufferContext;
48 /** @class FFmpegDecoder
49 * @brief A decoder using FFmpeg to decode content.
51 class FFmpegDecoder : public Decoder
54 FFmpegDecoder (boost::shared_ptr<const FilmState>, boost::shared_ptr<const Options>, Job *, Log *, bool, bool);
57 /* Methods to query our input video */
58 int length_in_frames () const;
59 int decoding_frames () const;
60 float frames_per_second () const;
61 Size native_size () const;
62 int audio_channels () const;
63 int audio_sample_rate () const;
64 AVSampleFormat audio_sample_format () const;
65 int64_t audio_channel_layout () const;
66 bool has_subtitles () const;
71 PixelFormat pixel_format () const;
72 int time_base_numerator () const;
73 int time_base_denominator () const;
74 int sample_aspect_ratio_numerator () const;
75 int sample_aspect_ratio_denominator () const;
76 void overlay (boost::shared_ptr<Image> image) const;
78 void setup_general ();
81 void setup_subtitle ();
83 void maybe_add_subtitle ();
85 AVFormatContext* _format_context;
87 int _audio_stream; ///< may be < 0 if there is no audio
88 int _subtitle_stream; ///< may be < 0 if there is no subtitle
91 AVCodecContext* _video_codec_context;
92 AVCodec* _video_codec;
93 AVCodecContext* _audio_codec_context; ///< may be 0 if there is no audio
94 AVCodec* _audio_codec; ///< may be 0 if there is no audio
95 AVCodecContext* _subtitle_codec_context; ///< may be 0 if there is no subtitle
96 AVCodec* _subtitle_codec; ///< may be 0 if there is no subtitle