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/*
Copyright (C) 2017 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
DCP-o-matic is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ffmpeg_transcoder.h"
#include "film.h"
#include "job.h"
#include "player.h"
#include "player_video.h"
#include "log.h"
#include "image.h"
#include "compose.hpp"
#include <iostream>
#include "i18n.h"
using std::string;
using std::runtime_error;
using std::cout;
using boost::shared_ptr;
using boost::bind;
using boost::weak_ptr;
static AVPixelFormat
force_pixel_format (AVPixelFormat, AVPixelFormat out)
{
return out;
}
FFmpegTranscoder::FFmpegTranscoder (shared_ptr<const Film> film, weak_ptr<Job> job, boost::filesystem::path output, Format format)
: Transcoder (film, job)
, _history (1000)
, _output (output)
{
switch (format) {
case FORMAT_PRORES:
_pixel_format = AV_PIX_FMT_YUV422P10;
_codec_name = "prores_ks";
break;
case FORMAT_H264:
_pixel_format = AV_PIX_FMT_YUV420P;
_codec_name = "libx264";
break;
}
}
void
FFmpegTranscoder::go ()
{
AVCodec* codec = avcodec_find_encoder_by_name (_codec_name.c_str());
if (!codec) {
throw runtime_error (String::compose ("could not find FFmpeg encoder %1", _codec_name));
}
_codec_context = avcodec_alloc_context3 (codec);
if (!_codec_context) {
throw runtime_error ("could not allocate FFmpeg context");
}
avcodec_get_context_defaults3 (_codec_context, codec);
/* Variable quantisation */
_codec_context->global_quality = 0;
_codec_context->width = _film->frame_size().width;
_codec_context->height = _film->frame_size().height;
_codec_context->time_base = (AVRational) { 1, _film->video_frame_rate() };
_codec_context->pix_fmt = _pixel_format;
_codec_context->flags |= CODEC_FLAG_QSCALE | CODEC_FLAG_GLOBAL_HEADER;
avformat_alloc_output_context2 (&_format_context, 0, 0, _output.string().c_str());
if (!_format_context) {
throw runtime_error ("could not allocate FFmpeg format context");
}
_video_stream = avformat_new_stream (_format_context, codec);
if (!_video_stream) {
throw runtime_error ("could not create FFmpeg output video stream");
}
/* Note: needs to increment with each stream */
_video_stream->id = 0;
_video_stream->codec = _codec_context;
AVDictionary* options = 0;
av_dict_set (&options, "profile", "3", 0);
av_dict_set (&options, "threads", "auto", 0);
if (avcodec_open2 (_codec_context, codec, &options) < 0) {
throw runtime_error ("could not open FFmpeg codec");
}
if (avio_open (&_format_context->pb, _output.c_str(), AVIO_FLAG_WRITE) < 0) {
throw runtime_error ("could not open FFmpeg output file");
}
if (avformat_write_header (_format_context, &options) < 0) {
throw runtime_error ("could not write header to FFmpeg output file");
}
{
shared_ptr<Job> job = _job.lock ();
DCPOMATIC_ASSERT (job);
job->sub (_("Encoding"));
}
while (!_player->pass ()) {}
while (true) {
AVPacket packet;
av_init_packet (&packet);
packet.data = 0;
packet.size = 0;
int got_packet;
avcodec_encode_video2 (_codec_context, &packet, 0, &got_packet);
if (!got_packet) {
break;
}
packet.stream_index = 0;
av_interleaved_write_frame (_format_context, &packet);
av_packet_unref (&packet);
}
av_write_trailer (_format_context);
avcodec_close (_codec_context);
avio_close (_format_context->pb);
avformat_free_context (_format_context);
}
void
FFmpegTranscoder::video (shared_ptr<PlayerVideo> video, DCPTime time)
{
shared_ptr<Image> image = video->image (
bind (&Log::dcp_log, _film->log().get(), _1, _2),
bind (&force_pixel_format, _1, _pixel_format),
true,
false
);
AVFrame* frame = av_frame_alloc ();
for (int i = 0; i < 3; ++i) {
size_t const size = image->stride()[i] * image->size().height;
AVBufferRef* buffer = av_buffer_alloc (size);
/* XXX: inefficient */
memcpy (buffer->data, image->data()[i], size);
frame->buf[i] = av_buffer_ref (buffer);
frame->data[i] = buffer->data;
frame->linesize[i] = image->stride()[i];
av_buffer_unref (&buffer);
}
frame->width = image->size().width;
frame->height = image->size().height;
frame->format = _pixel_format;
frame->pts = time.seconds() / av_q2d (_video_stream->time_base);
AVPacket packet;
av_init_packet (&packet);
packet.data = 0;
packet.size = 0;
int got_packet;
if (avcodec_encode_video2 (_codec_context, &packet, frame, &got_packet) < 0) {
throw EncodeError ("FFmpeg video encode failed");
}
if (got_packet && packet.size) {
/* XXX: this should not be hard-wired */
packet.stream_index = 0;
av_interleaved_write_frame (_format_context, &packet);
av_packet_unref (&packet);
}
av_frame_free (&frame);
_history.event ();
{
boost::mutex::scoped_lock lm (_mutex);
_last_time = time;
}
shared_ptr<Job> job = _job.lock ();
if (job) {
job->set_progress (float(time.get()) / _film->length().get());
}
}
void
FFmpegTranscoder::audio (shared_ptr<AudioBuffers> audio, DCPTime time)
{
}
void
FFmpegTranscoder::subtitle (PlayerSubtitles subs, DCPTimePeriod period)
{
}
float
FFmpegTranscoder::current_rate () const
{
return _history.rate ();
}
Frame
FFmpegTranscoder::frames_done () const
{
boost::mutex::scoped_lock lm (_mutex);
return _last_time.frames_round (_film->video_frame_rate ());
}
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