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 class FFmpegFileEncoder
  35 {
  36 public:
  37         FFmpegFileEncoder (
  38                 dcp::Size video_frame_size,
  39                 int video_frame_rate,
  40                 int audio_frame_rate,
  41                 int channels,
  42                 ExportFormat,
  43                 int x264_crf,
  44                 boost::filesystem::path output
  45 #ifdef DCPOMATIC_VARIANT_SWAROOP
  46                 , boost::optional<dcp::Key> key
  47                 , boost::optional<std::string> id
  48 #endif
  49                 );
  50
  51         void video (boost::shared_ptr<PlayerVideo>, dcpomatic::DCPTime);
  52         void audio (boost::shared_ptr<AudioBuffers>);
  53         void subtitle (PlayerText, dcpomatic::DCPTimePeriod);
  54
  55         void flush ();
  56
  57         static AVPixelFormat pixel_format (ExportFormat format);
  58
  59 private:
  60         void setup_video ();
  61         void setup_audio ();
  62
  63         void audio_frame (int size);
  64
  65         static void buffer_free(void* opaque, uint8_t* data);
  66         void buffer_free2(uint8_t* data);
  67
  68         AVCodec* _video_codec;
  69         AVCodecContext* _video_codec_context;
  70         AVCodec* _audio_codec;
  71         AVCodecContext* _audio_codec_context;
  72         AVFormatContext* _format_context;
  73         AVStream* _video_stream;
  74         AVStream* _audio_stream;
  75         AVPixelFormat _pixel_format;
  76         AVSampleFormat _sample_format;
  77         AVDictionary* _video_options;
  78         std::string _video_codec_name;
  79         std::string _audio_codec_name;
  80         int _audio_channels;
  81
  82         boost::filesystem::path _output;
  83         dcp::Size _video_frame_size;
  84         int _video_frame_rate;
  85         int _audio_frame_rate;
  86
  87         int64_t _audio_frames;
  88
  89         boost::shared_ptr<AudioBuffers> _pending_audio;
  90
  91         /** Store of shared_ptr<Image> to keep them alive whilst raw pointers into
  92             their data have been passed to FFmpeg.
  93         */
  94         std::map<uint8_t*, boost::shared_ptr<const Image> > _pending_images;
  95         boost::mutex _pending_images_mutex;
  96
  97         static int _video_stream_index;
  98         static int _audio_stream_index;
  99 };
 100
 101 #endif