2 Copyright (C) 2017 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
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.
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.
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/>.
21 #include "ffmpeg_transcoder.h"
25 #include "player_video.h"
28 #include "compose.hpp"
33 using std::runtime_error;
34 using boost::shared_ptr;
36 using boost::weak_ptr;
39 force_pixel_format (AVPixelFormat, AVPixelFormat out)
44 FFmpegTranscoder::FFmpegTranscoder (shared_ptr<const Film> film, weak_ptr<Job> job)
45 : Transcoder (film, job)
46 , _pixel_format (AV_PIX_FMT_YUV422P10)
52 FFmpegTranscoder::go ()
54 string const codec_name = "prores_ks";
55 AVCodec* codec = avcodec_find_encoder_by_name (codec_name.c_str());
57 throw runtime_error (String::compose ("could not find FFmpeg codec %1", codec_name));
60 _codec_context = avcodec_alloc_context3 (codec);
61 if (!_codec_context) {
62 throw runtime_error ("could not allocate FFmpeg context");
65 avcodec_get_context_defaults3 (_codec_context, codec);
67 /* Variable quantisation */
68 _codec_context->global_quality = 0;
69 _codec_context->width = _film->frame_size().width;
70 _codec_context->height = _film->frame_size().height;
71 _codec_context->time_base = (AVRational) { 1, _film->video_frame_rate() };
72 _codec_context->pix_fmt = _pixel_format;
73 _codec_context->flags |= CODEC_FLAG_QSCALE | CODEC_FLAG_GLOBAL_HEADER;
75 boost::filesystem::path filename = _film->file(_film->isdcf_name(true) + ".mov");
76 avformat_alloc_output_context2 (&_format_context, 0, 0, filename.string().c_str());
77 if (!_format_context) {
78 throw runtime_error ("could not allocate FFmpeg format context");
81 _video_stream = avformat_new_stream (_format_context, codec);
83 throw runtime_error ("could not create FFmpeg output video stream");
86 /* Note: needs to increment with each stream */
87 _video_stream->id = 0;
88 _video_stream->codec = _codec_context;
90 AVDictionary* options = 0;
91 av_dict_set (&options, "profile", "3", 0);
92 av_dict_set (&options, "threads", "auto", 0);
94 if (avcodec_open2 (_codec_context, codec, &options) < 0) {
95 throw runtime_error ("could not open FFmpeg codec");
98 if (avio_open (&_format_context->pb, filename.c_str(), AVIO_FLAG_WRITE) < 0) {
99 throw runtime_error ("could not open FFmpeg output file");
102 if (avformat_write_header (_format_context, &options) < 0) {
103 throw runtime_error ("could not write header to FFmpeg output file");
107 shared_ptr<Job> job = _job.lock ();
108 DCPOMATIC_ASSERT (job);
109 job->sub (_("Encoding"));
112 while (!_player->pass ()) {}
116 av_init_packet (&packet);
121 avcodec_encode_video2 (_codec_context, &packet, 0, &got_packet);
126 packet.stream_index = 0;
127 av_interleaved_write_frame (_format_context, &packet);
128 av_packet_unref (&packet);
131 av_write_trailer (_format_context);
133 avcodec_close (_codec_context);
134 avio_close (_format_context->pb);
135 avformat_free_context (_format_context);
139 FFmpegTranscoder::video (shared_ptr<PlayerVideo> video, DCPTime time)
141 shared_ptr<Image> image = video->image (
142 bind (&Log::dcp_log, _film->log().get(), _1, _2),
143 bind (&force_pixel_format, _1, _pixel_format),
148 AVFrame* frame = av_frame_alloc ();
150 for (int i = 0; i < 3; ++i) {
151 size_t const size = image->stride()[i] * image->size().height;
152 AVBufferRef* buffer = av_buffer_alloc (size);
153 /* XXX: inefficient */
154 memcpy (buffer->data, image->data()[i], size);
155 frame->buf[i] = av_buffer_ref (buffer);
156 frame->data[i] = buffer->data;
157 frame->linesize[i] = image->stride()[i];
158 av_buffer_unref (&buffer);
161 frame->width = image->size().width;
162 frame->height = image->size().height;
163 frame->format = _pixel_format;
164 frame->pts = time.frames_round(_film->video_frame_rate()) / (_film->video_frame_rate() * av_q2d (_video_stream->time_base));
167 av_init_packet (&packet);
172 if (avcodec_encode_video2 (_codec_context, &packet, frame, &got_packet) < 0) {
173 throw EncodeError ("FFmpeg video encode failed");
176 if (got_packet && packet.size) {
177 /* XXX: this should not be hard-wired */
178 packet.stream_index = 0;
179 av_interleaved_write_frame (_format_context, &packet);
180 av_packet_unref (&packet);
183 av_frame_free (&frame);
187 FFmpegTranscoder::audio (shared_ptr<AudioBuffers> audio, DCPTime time)
193 FFmpegTranscoder::subtitle (PlayerSubtitles subs, DCPTimePeriod period)
199 FFmpegTranscoder::current_encoding_rate () const
206 FFmpegTranscoder::video_frames_enqueued () const