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