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
  22 #ifndef DCPOMATIC_FFMPEG_FILE_ENCODER_H
  23 #define DCPOMATIC_FFMPEG_FILE_ENCODER_H
  24
  25
  26 #include "audio_buffers.h"
  27 #include "audio_mapping.h"
  28 #include "dcpomatic_time.h"
  29 #include "event_history.h"
  30 #include "image_store.h"
  31 #include "log.h"
  32 #include "player_text.h"
  33 #include "player_video.h"
  34 #include <dcp/key.h>
  35 #include <dcp/warnings.h>
  36 LIBDCP_DISABLE_WARNINGS
  37 extern "C" {
  38 #include <libavcodec/avcodec.h>
  39 #include <libavformat/avformat.h>
  40 }
  41 LIBDCP_ENABLE_WARNINGS
  42
  43
  44 class ExportAudioStream;
  45
  46
  47 enum class ExportFormat
  48 {
  49         PRORES_4444,
  50         PRORES_HQ,
  51         H264_AAC,
  52         SUBTITLES_DCP
  53 };
  54
  55
  56 class FFmpegFileEncoder
  57 {
  58 public:
  59         FFmpegFileEncoder (
  60                 dcp::Size video_frame_size,
  61                 int video_frame_rate,
  62                 int audio_frame_rate,
  63                 int channels,
  64                 ExportFormat,
  65                 bool audio_stream_per_channel,
  66                 int x264_crf,
  67                 boost::filesystem::path output
  68                 );
  69
  70         ~FFmpegFileEncoder ();
  71
  72         void video (std::shared_ptr<PlayerVideo>, dcpomatic::DCPTime);
  73         void audio (std::shared_ptr<AudioBuffers>);
  74         void subtitle (PlayerText, dcpomatic::DCPTimePeriod);
  75
  76         void flush ();
  77
  78         static AVPixelFormat pixel_format (ExportFormat format);
  79
  80 private:
  81         void setup_video ();
  82         void setup_audio ();
  83
  84         void audio_frame (int size);
  85
  86         AVCodec const * _video_codec = nullptr;
  87         AVCodecContext* _video_codec_context = nullptr;
  88         std::vector<std::shared_ptr<ExportAudioStream>> _audio_streams;
  89         bool _audio_stream_per_channel;
  90         AVFormatContext* _format_context = nullptr;
  91         AVStream* _video_stream = nullptr;
  92         AVPixelFormat _pixel_format;
  93         AVSampleFormat _sample_format;
  94         AVDictionary* _video_options = nullptr;
  95         std::string _video_codec_name;
  96         std::string _audio_codec_name;
  97         int _audio_channels;
  98
  99         boost::filesystem::path _output;
 100         dcp::Size _video_frame_size;
 101         int _video_frame_rate;
 102         int _audio_frame_rate;
 103
 104         int64_t _audio_frames = 0;
 105
 106         std::shared_ptr<AudioBuffers> _pending_audio;
 107
 108         ImageStore _pending_images;
 109
 110         static int _video_stream_index;
 111         static int _audio_stream_index_base;
 112 };
 113
 114 #endif