src/lib/ffmpeg_file_encoder.h

   1 /*
   2     Copyright (C) 2017-2018 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic 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.
  10
  11     DCP-o-matic 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.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21 #ifndef DCPOMATIC_FFMPEG_FILE_ENCODER_H
  22 #define DCPOMATIC_FFMPEG_FILE_ENCODER_H
  23
  24 #include "encoder.h"
  25 #include "event_history.h"
  26 #include "audio_mapping.h"
  27 #include "log.h"
  28 #include <dcp/key.h>
  29 extern "C" {
  30 #include <libavcodec/avcodec.h>
  31 #include <libavformat/avformat.h>
  32 }
  33
  34
  35 class ExportAudioStream;
  36
  37
  38 class FFmpegFileEncoder
  39 {
  40 public:
  41         FFmpegFileEncoder (
  42                 dcp::Size video_frame_size,
  43                 int video_frame_rate,
  44                 int audio_frame_rate,
  45                 int channels,
  46                 ExportFormat,
  47                 bool audio_stream_per_channel,
  48                 int x264_crf,
  49                 boost::filesystem::path output
  50 #ifdef DCPOMATIC_VARIANT_SWAROOP
  51                 , boost::optional<dcp::Key> key
  52                 , boost::optional<std::string> id
  53 #endif
  54                 );
  55
  56         ~FFmpegFileEncoder ();
  57
  58         void video (boost::shared_ptr<PlayerVideo>, dcpomatic::DCPTime);
  59         void audio (boost::shared_ptr<AudioBuffers>);
  60         void subtitle (PlayerText, dcpomatic::DCPTimePeriod);
  61
  62         void flush ();
  63
  64         static AVPixelFormat pixel_format (ExportFormat format);
  65
  66 private:
  67         void setup_video ();
  68         void setup_audio ();
  69
  70         void audio_frame (int size);
  71
  72         static void buffer_free(void* opaque, uint8_t* data);
  73         void buffer_free2(uint8_t* data);
  74
  75         AVCodec* _video_codec;
  76         AVCodecContext* _video_codec_context;
  77         std::vector<boost::shared_ptr<ExportAudioStream> > _audio_streams;
  78         bool _audio_stream_per_channel;
  79         AVFormatContext* _format_context;
  80         AVStream* _video_stream;
  81         AVPixelFormat _pixel_format;
  82         AVSampleFormat _sample_format;
  83         AVDictionary* _video_options;
  84         std::string _video_codec_name;
  85         std::string _audio_codec_name;
  86         int _audio_channels;
  87
  88         boost::filesystem::path _output;
  89         dcp::Size _video_frame_size;
  90         int _video_frame_rate;
  91         int _audio_frame_rate;
  92
  93         int64_t _audio_frames;
  94
  95         boost::shared_ptr<AudioBuffers> _pending_audio;
  96
  97         /** Store of shared_ptr<Image> to keep them alive whilst raw pointers into
  98             their data have been passed to FFmpeg.
  99         */
 100         std::map<uint8_t*, boost::shared_ptr<const Image> > _pending_images;
 101         boost::mutex _pending_images_mutex;
 102
 103         static int _video_stream_index;
 104         static int _audio_stream_index_base;
 105 };
 106
 107 #endif