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_encoder.h"
25 #include "player_video.h"
28 #include "compose.hpp"
34 using std::runtime_error;
36 using boost::shared_ptr;
38 using boost::weak_ptr;
41 force_pixel_format (AVPixelFormat, AVPixelFormat out)
46 FFmpegEncoder::FFmpegEncoder (shared_ptr<const Film> film, weak_ptr<Job> job, boost::filesystem::path output, Format format)
53 _pixel_format = AV_PIX_FMT_YUV422P10;
54 _codec_name = "prores_ks";
57 _pixel_format = AV_PIX_FMT_YUV420P;
58 _codec_name = "libx264";
66 AVCodec* codec = avcodec_find_encoder_by_name (_codec_name.c_str());
68 throw runtime_error (String::compose ("could not find FFmpeg encoder %1", _codec_name));
71 _codec_context = avcodec_alloc_context3 (codec);
72 if (!_codec_context) {
73 throw runtime_error ("could not allocate FFmpeg context");
76 avcodec_get_context_defaults3 (_codec_context, codec);
78 /* Variable quantisation */
79 _codec_context->global_quality = 0;
80 _codec_context->width = _film->frame_size().width;
81 _codec_context->height = _film->frame_size().height;
82 _codec_context->time_base = (AVRational) { 1, _film->video_frame_rate() };
83 _codec_context->pix_fmt = _pixel_format;
84 _codec_context->flags |= CODEC_FLAG_QSCALE | CODEC_FLAG_GLOBAL_HEADER;
86 avformat_alloc_output_context2 (&_format_context, 0, 0, _output.string().c_str());
87 if (!_format_context) {
88 throw runtime_error ("could not allocate FFmpeg format context");
91 _video_stream = avformat_new_stream (_format_context, codec);
93 throw runtime_error ("could not create FFmpeg output video stream");
96 /* Note: needs to increment with each stream */
97 _video_stream->id = 0;
98 _video_stream->codec = _codec_context;
100 AVDictionary* options = 0;
101 av_dict_set (&options, "profile", "3", 0);
102 av_dict_set (&options, "threads", "auto", 0);
104 if (avcodec_open2 (_codec_context, codec, &options) < 0) {
105 throw runtime_error ("could not open FFmpeg codec");
108 if (avio_open (&_format_context->pb, _output.c_str(), AVIO_FLAG_WRITE) < 0) {
109 throw runtime_error ("could not open FFmpeg output file");
112 if (avformat_write_header (_format_context, &options) < 0) {
113 throw runtime_error ("could not write header to FFmpeg output file");
117 shared_ptr<Job> job = _job.lock ();
118 DCPOMATIC_ASSERT (job);
119 job->sub (_("Encoding"));
122 while (!_player->pass ()) {}
126 av_init_packet (&packet);
131 avcodec_encode_video2 (_codec_context, &packet, 0, &got_packet);
136 packet.stream_index = 0;
137 av_interleaved_write_frame (_format_context, &packet);
138 av_packet_unref (&packet);
141 av_write_trailer (_format_context);
143 avcodec_close (_codec_context);
144 avio_close (_format_context->pb);
145 avformat_free_context (_format_context);
149 FFmpegEncoder::video (shared_ptr<PlayerVideo> video, DCPTime time)
151 shared_ptr<Image> image = video->image (
152 bind (&Log::dcp_log, _film->log().get(), _1, _2),
153 bind (&force_pixel_format, _1, _pixel_format),
158 AVFrame* frame = av_frame_alloc ();
160 for (int i = 0; i < 3; ++i) {
161 size_t const size = image->stride()[i] * image->size().height;
162 AVBufferRef* buffer = av_buffer_alloc (size);
163 /* XXX: inefficient */
164 memcpy (buffer->data, image->data()[i], size);
165 frame->buf[i] = av_buffer_ref (buffer);
166 frame->data[i] = buffer->data;
167 frame->linesize[i] = image->stride()[i];
168 av_buffer_unref (&buffer);
171 frame->width = image->size().width;
172 frame->height = image->size().height;
173 frame->format = _pixel_format;
174 frame->pts = time.seconds() / av_q2d (_video_stream->time_base);
177 av_init_packet (&packet);
182 if (avcodec_encode_video2 (_codec_context, &packet, frame, &got_packet) < 0) {
183 throw EncodeError ("FFmpeg video encode failed");
186 if (got_packet && packet.size) {
187 /* XXX: this should not be hard-wired */
188 packet.stream_index = 0;
189 av_interleaved_write_frame (_format_context, &packet);
190 av_packet_unref (&packet);
193 av_frame_free (&frame);
198 boost::mutex::scoped_lock lm (_mutex);
202 shared_ptr<Job> job = _job.lock ();
204 job->set_progress (float(time.get()) / _film->length().get());
209 FFmpegEncoder::audio (shared_ptr<AudioBuffers> audio, DCPTime time)
215 FFmpegEncoder::subtitle (PlayerSubtitles subs, DCPTimePeriod period)
221 FFmpegEncoder::current_rate () const
223 return _history.rate ();
227 FFmpegEncoder::frames_done () const
229 boost::mutex::scoped_lock lm (_mutex);
230 return _last_time.frames_round (_film->video_frame_rate ());