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)
54 _pixel_format = AV_PIX_FMT_YUV422P10;
55 _codec_name = "prores_ks";
56 av_dict_set (&_options, "profile", "3", 0);
57 av_dict_set (&_options, "threads", "auto", 0);
60 _pixel_format = AV_PIX_FMT_YUV420P;
61 _codec_name = "libx264";
69 AVCodec* codec = avcodec_find_encoder_by_name (_codec_name.c_str());
71 throw runtime_error (String::compose ("could not find FFmpeg encoder %1", _codec_name));
74 _codec_context = avcodec_alloc_context3 (codec);
75 if (!_codec_context) {
76 throw runtime_error ("could not allocate FFmpeg context");
79 avcodec_get_context_defaults3 (_codec_context, codec);
81 /* Variable quantisation */
82 _codec_context->global_quality = 0;
83 _codec_context->width = _film->frame_size().width;
84 _codec_context->height = _film->frame_size().height;
85 _codec_context->time_base = (AVRational) { 1, _film->video_frame_rate() };
86 _codec_context->pix_fmt = _pixel_format;
87 _codec_context->flags |= CODEC_FLAG_QSCALE | CODEC_FLAG_GLOBAL_HEADER;
89 avformat_alloc_output_context2 (&_format_context, 0, 0, _output.string().c_str());
90 if (!_format_context) {
91 throw runtime_error ("could not allocate FFmpeg format context");
94 _video_stream = avformat_new_stream (_format_context, codec);
96 throw runtime_error ("could not create FFmpeg output video stream");
99 /* Note: needs to increment with each stream */
100 _video_stream->id = 0;
101 _video_stream->codec = _codec_context;
103 if (avcodec_open2 (_codec_context, codec, &_options) < 0) {
104 throw runtime_error ("could not open FFmpeg codec");
107 if (avio_open (&_format_context->pb, _output.c_str(), AVIO_FLAG_WRITE) < 0) {
108 throw runtime_error ("could not open FFmpeg output file");
111 if (avformat_write_header (_format_context, &_options) < 0) {
112 throw runtime_error ("could not write header to FFmpeg output file");
116 shared_ptr<Job> job = _job.lock ();
117 DCPOMATIC_ASSERT (job);
118 job->sub (_("Encoding"));
121 while (!_player->pass ()) {}
125 av_init_packet (&packet);
130 avcodec_encode_video2 (_codec_context, &packet, 0, &got_packet);
135 packet.stream_index = 0;
136 av_interleaved_write_frame (_format_context, &packet);
137 av_packet_unref (&packet);
140 av_write_trailer (_format_context);
142 avcodec_close (_codec_context);
143 avio_close (_format_context->pb);
144 avformat_free_context (_format_context);
148 FFmpegEncoder::video (shared_ptr<PlayerVideo> video, DCPTime time)
150 shared_ptr<Image> image = video->image (
151 bind (&Log::dcp_log, _film->log().get(), _1, _2),
152 bind (&force_pixel_format, _1, _pixel_format),
157 AVFrame* frame = av_frame_alloc ();
159 for (int i = 0; i < 3; ++i) {
160 size_t const size = image->stride()[i] * image->size().height;
161 AVBufferRef* buffer = av_buffer_alloc (size);
162 /* XXX: inefficient */
163 memcpy (buffer->data, image->data()[i], size);
164 frame->buf[i] = av_buffer_ref (buffer);
165 frame->data[i] = buffer->data;
166 frame->linesize[i] = image->stride()[i];
167 av_buffer_unref (&buffer);
170 frame->width = image->size().width;
171 frame->height = image->size().height;
172 frame->format = _pixel_format;
173 frame->pts = time.seconds() / av_q2d (_video_stream->time_base);
176 av_init_packet (&packet);
181 if (avcodec_encode_video2 (_codec_context, &packet, frame, &got_packet) < 0) {
182 throw EncodeError ("FFmpeg video encode failed");
185 if (got_packet && packet.size) {
186 /* XXX: this should not be hard-wired */
187 packet.stream_index = 0;
188 av_interleaved_write_frame (_format_context, &packet);
189 av_packet_unref (&packet);
192 av_frame_free (&frame);
197 boost::mutex::scoped_lock lm (_mutex);
201 shared_ptr<Job> job = _job.lock ();
203 job->set_progress (float(time.get()) / _film->length().get());
208 FFmpegEncoder::audio (shared_ptr<AudioBuffers> audio, DCPTime time)
214 FFmpegEncoder::subtitle (PlayerSubtitles subs, DCPTimePeriod period)
220 FFmpegEncoder::current_rate () const
222 return _history.rate ();
226 FFmpegEncoder::frames_done () const
228 boost::mutex::scoped_lock lm (_mutex);
229 return _last_time.frames_round (_film->video_frame_rate ());