/*
- Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2018 Carl Hetherington <cth@carlh.net>
- This program is free software; you can redistribute it and/or modify
+ 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.
- This program is distributed in the hope that it will be useful,
+ 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 this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
+
/** @file src/ffmpeg_decoder.cc
* @brief A decoder using FFmpeg to decode content.
*/
-#include <stdexcept>
-#include <vector>
-#include <iomanip>
-#include <iostream>
-#include <stdint.h>
-#include <sndfile.h>
-extern "C" {
-#include <libavcodec/avcodec.h>
-#include <libavformat/avformat.h>
-}
-#include "filter.h"
+
+#include "audio_buffers.h"
+#include "audio_content.h"
+#include "audio_decoder.h"
+#include "compose.hpp"
+#include "dcpomatic_log.h"
#include "exceptions.h"
-#include "image.h"
-#include "util.h"
-#include "log.h"
-#include "ffmpeg_decoder.h"
#include "ffmpeg_audio_stream.h"
-#include "ffmpeg_subtitle_stream.h"
-#include "filter_graph.h"
-#include "audio_buffers.h"
#include "ffmpeg_content.h"
-#include "raw_image_proxy.h"
+#include "ffmpeg_decoder.h"
+#include "ffmpeg_subtitle_stream.h"
#include "film.h"
-#include "timer.h"
+#include "filter.h"
+#include "frame_interval_checker.h"
+#include "image.h"
+#include "log.h"
+#include "raw_image_proxy.h"
+#include "text_content.h"
+#include "text_decoder.h"
+#include "util.h"
+#include "video_decoder.h"
+#include "video_filter_graph.h"
+#include <dcp/subtitle_string.h>
+#include <sub/ssa_reader.h>
+#include <sub/subtitle.h>
+#include <sub/collect.h>
+extern "C" {
+#include <libavcodec/avcodec.h>
+#include <libavformat/avformat.h>
+}
+#include <boost/algorithm/string.hpp>
+#include <iomanip>
+#include <iostream>
+#include <vector>
+#include <stdint.h>
#include "i18n.h"
-#define LOG_GENERAL(...) _video_content->film()->log()->log (String::compose (__VA_ARGS__), Log::TYPE_GENERAL);
-#define LOG_ERROR(...) _video_content->film()->log()->log (String::compose (__VA_ARGS__), Log::TYPE_ERROR);
-#define LOG_WARNING(...) _video_content->film()->log()->log (__VA_ARGS__, Log::TYPE_WARNING);
using std::cout;
+using std::dynamic_pointer_cast;
+using std::make_shared;
+using std::min;
+using std::shared_ptr;
using std::string;
using std::vector;
-using std::list;
-using std::min;
-using std::pair;
-using std::make_pair;
-using boost::shared_ptr;
using boost::optional;
-using boost::dynamic_pointer_cast;
using dcp::Size;
+using namespace dcpomatic;
-FFmpegDecoder::FFmpegDecoder (shared_ptr<const FFmpegContent> c, shared_ptr<Log> log)
- : VideoDecoder (c)
- , AudioDecoder (c)
- , SubtitleDecoder (c)
- , FFmpeg (c)
- , _log (log)
+
+FFmpegDecoder::FFmpegDecoder (shared_ptr<const Film> film, shared_ptr<const FFmpegContent> c, bool fast)
+ : FFmpeg (c)
+ , Decoder (film)
{
- /* Audio and video frame PTS values may not start with 0. We want
- to fiddle them so that:
+ if (c->video && c->video->use()) {
+ video = make_shared<VideoDecoder>(this, c);
+ _pts_offset = pts_offset (c->ffmpeg_audio_streams(), c->first_video(), c->active_video_frame_rate(film));
+ /* It doesn't matter what size or pixel format this is, it just needs to be black */
+ _black_image = make_shared<Image>(AV_PIX_FMT_RGB24, dcp::Size (128, 128), Image::Alignment::PADDED);
+ _black_image->make_black ();
+ } else {
+ _pts_offset = {};
+ }
- 1. One of them starts at time 0.
- 2. The first video PTS value ends up on a frame boundary.
+ if (c->audio) {
+ audio = make_shared<AudioDecoder>(this, c->audio, fast);
+ }
- Then we remove big initial gaps in PTS and we allow our
- insertion of black frames to work.
+ if (c->only_text()) {
+ /* XXX: this time here should be the time of the first subtitle, not 0 */
+ text.push_back (make_shared<TextDecoder>(this, c->only_text(), ContentTime()));
+ }
- We will do pts_to_use = pts_from_ffmpeg + pts_offset;
- */
+ for (auto i: c->ffmpeg_audio_streams()) {
+ _next_time[i] = boost::optional<dcpomatic::ContentTime>();
+ }
+}
- bool const have_video = c->first_video();
- bool const have_audio = c->audio_stream () && c->audio_stream()->first_audio;
- /* First, make one of them start at 0 */
+bool
+FFmpegDecoder::flush ()
+{
+ /* Flush video and audio once */
- if (have_audio && have_video) {
- _pts_offset = - min (c->first_video().get(), c->audio_stream()->first_audio.get());
- } else if (have_video) {
- _pts_offset = - c->first_video().get();
- } else if (have_audio) {
- _pts_offset = - c->audio_stream()->first_audio.get();
+ bool did_something = false;
+ if (video) {
+ if (decode_and_process_video_packet(nullptr)) {
+ did_something = true;
+ }
}
- /* Now adjust both so that the video pts starts on a frame */
- if (have_video && have_audio) {
- ContentTime first_video = c->first_video().get() + _pts_offset;
- ContentTime const old_first_video = first_video;
- _pts_offset += first_video.round_up (c->video_frame_rate ()) - old_first_video;
+ for (auto i: ffmpeg_content()->ffmpeg_audio_streams()) {
+ auto context = _codec_context[i->index(_format_context)];
+ int r = avcodec_send_packet (context, nullptr);
+ if (r < 0 && r != AVERROR_EOF) {
+ /* EOF can happen if we've already sent a flush packet */
+ throw DecodeError (N_("avcodec_send_packet"), N_("FFmpegDecoder::flush"), r);
+ }
+ r = avcodec_receive_frame (context, audio_frame(i));
+ if (r >= 0) {
+ process_audio_frame (i);
+ did_something = true;
+ }
}
-}
-void
-FFmpegDecoder::flush ()
-{
- /* Get any remaining frames */
-
- _packet.data = 0;
- _packet.size = 0;
-
- /* XXX: should we reset _packet.data and size after each *_decode_* call? */
-
- while (decode_video_packet ()) {}
-
- if (_ffmpeg_content->audio_stream()) {
- decode_audio_packet ();
- AudioDecoder::flush ();
+ if (did_something) {
+ /* We want to be called again */
+ return false;
+ }
+
+ /* Make sure all streams are the same length and round up to the next video frame */
+
+ auto const frc = film()->active_frame_rate_change(_ffmpeg_content->position());
+ ContentTime full_length (_ffmpeg_content->full_length(film()), frc);
+ full_length = full_length.ceil (frc.source);
+ if (video) {
+ double const vfr = _ffmpeg_content->video_frame_rate().get();
+ auto const f = full_length.frames_round (vfr);
+ auto v = video->position(film()).get_value_or(ContentTime()).frames_round(vfr) + 1;
+ while (v < f) {
+ video->emit (film(), shared_ptr<const ImageProxy> (new RawImageProxy (_black_image)), v);
+ ++v;
+ }
+ }
+
+ for (auto i: _ffmpeg_content->ffmpeg_audio_streams ()) {
+ auto a = audio->stream_position(film(), i);
+ /* Unfortunately if a is 0 that really means that we don't know the stream position since
+ there has been no data on it since the last seek. In this case we'll just do nothing
+ here. I'm not sure if that's the right idea.
+ */
+ if (a > ContentTime()) {
+ while (a < full_length) {
+ auto to_do = min (full_length - a, ContentTime::from_seconds (0.1));
+ auto silence = make_shared<AudioBuffers>(i->channels(), to_do.frames_ceil (i->frame_rate()));
+ silence->make_silent ();
+ audio->emit (film(), i, silence, a, true);
+ a += to_do;
+ }
+ }
+ }
+
+ if (audio) {
+ audio->flush ();
}
+
+ return true;
}
+
bool
FFmpegDecoder::pass ()
{
- int r = av_read_frame (_format_context, &_packet);
+ auto packet = av_packet_alloc();
+ DCPOMATIC_ASSERT (packet);
- if (r < 0) {
+ int r = av_read_frame (_format_context, packet);
+
+ /* AVERROR_INVALIDDATA can apparently be returned sometimes even when av_read_frame
+ has pretty-much succeeded (and hence generated data which should be processed).
+ Hence it makes sense to continue here in that case.
+ */
+ if (r < 0 && r != AVERROR_INVALIDDATA) {
if (r != AVERROR_EOF) {
/* Maybe we should fail here, but for now we'll just finish off instead */
char buf[256];
av_strerror (r, buf, sizeof(buf));
- LOG_ERROR (N_("error on av_read_frame (%1) (%2)"), buf, r);
+ LOG_ERROR (N_("error on av_read_frame (%1) (%2)"), &buf[0], r);
}
- flush ();
- return true;
+ av_packet_free (&packet);
+ return flush ();
}
- int const si = _packet.stream_index;
+ int const si = packet->stream_index;
+ auto fc = _ffmpeg_content;
- if (si == _video_stream) {
- decode_video_packet ();
- } else if (_ffmpeg_content->audio_stream() && _ffmpeg_content->audio_stream()->uses_index (_format_context, si)) {
- decode_audio_packet ();
- } else if (_ffmpeg_content->subtitle_stream() && _ffmpeg_content->subtitle_stream()->uses_index (_format_context, si)) {
- decode_subtitle_packet ();
+ if (_video_stream && si == _video_stream.get() && video && !video->ignore()) {
+ decode_and_process_video_packet (packet);
+ } else if (fc->subtitle_stream() && fc->subtitle_stream()->uses_index(_format_context, si) && !only_text()->ignore()) {
+ decode_and_process_subtitle_packet (packet);
+ } else {
+ decode_and_process_audio_packet (packet);
}
- av_free_packet (&_packet);
+ av_packet_free (&packet);
return false;
}
+
/** @param data pointer to array of pointers to buffers.
* Only the first buffer will be used for non-planar data, otherwise there will be one per channel.
*/
shared_ptr<AudioBuffers>
-FFmpegDecoder::deinterleave_audio (uint8_t** data, int size)
+FFmpegDecoder::deinterleave_audio (AVFrame* frame)
{
- assert (_ffmpeg_content->audio_channels());
- assert (bytes_per_audio_sample());
+ auto format = static_cast<AVSampleFormat>(frame->format);
- /* Deinterleave and convert to float */
+ /* XXX: can't we use swr_convert() to do the format conversion? */
- assert ((size % (bytes_per_audio_sample() * _ffmpeg_content->audio_channels())) == 0);
+ int const channels = frame->channels;
+ int const frames = frame->nb_samples;
+ int const total_samples = frames * channels;
+ auto audio = make_shared<AudioBuffers>(channels, frames);
+ auto data = audio->data();
- int const total_samples = size / bytes_per_audio_sample();
- int const frames = total_samples / _ffmpeg_content->audio_channels();
- shared_ptr<AudioBuffers> audio (new AudioBuffers (_ffmpeg_content->audio_channels(), frames));
-
- switch (audio_sample_format()) {
+ switch (format) {
case AV_SAMPLE_FMT_U8:
{
- uint8_t* p = reinterpret_cast<uint8_t *> (data[0]);
+ auto p = reinterpret_cast<uint8_t *> (frame->data[0]);
int sample = 0;
int channel = 0;
for (int i = 0; i < total_samples; ++i) {
- audio->data(channel)[sample] = float(*p++) / (1 << 23);
+ data[channel][sample] = float(*p++) / (1 << 23);
++channel;
- if (channel == _ffmpeg_content->audio_channels()) {
+ if (channel == channels) {
channel = 0;
++sample;
}
}
}
break;
-
+
case AV_SAMPLE_FMT_S16:
{
- int16_t* p = reinterpret_cast<int16_t *> (data[0]);
+ auto p = reinterpret_cast<int16_t *> (frame->data[0]);
int sample = 0;
int channel = 0;
for (int i = 0; i < total_samples; ++i) {
- audio->data(channel)[sample] = float(*p++) / (1 << 15);
+ data[channel][sample] = float(*p++) / (1 << 15);
++channel;
- if (channel == _ffmpeg_content->audio_channels()) {
+ if (channel == channels) {
channel = 0;
++sample;
}
case AV_SAMPLE_FMT_S16P:
{
- int16_t** p = reinterpret_cast<int16_t **> (data);
- for (int i = 0; i < _ffmpeg_content->audio_channels(); ++i) {
+ auto p = reinterpret_cast<int16_t **> (frame->data);
+ for (int i = 0; i < channels; ++i) {
for (int j = 0; j < frames; ++j) {
- audio->data(i)[j] = static_cast<float>(p[i][j]) / (1 << 15);
+ data[i][j] = static_cast<float>(p[i][j]) / (1 << 15);
}
}
}
break;
-
+
case AV_SAMPLE_FMT_S32:
{
- int32_t* p = reinterpret_cast<int32_t *> (data[0]);
+ auto p = reinterpret_cast<int32_t *> (frame->data[0]);
int sample = 0;
int channel = 0;
for (int i = 0; i < total_samples; ++i) {
- audio->data(channel)[sample] = static_cast<float>(*p++) / (1 << 31);
+ data[channel][sample] = static_cast<float>(*p++) / 2147483648;
++channel;
- if (channel == _ffmpeg_content->audio_channels()) {
+ if (channel == channels) {
channel = 0;
++sample;
}
}
break;
+ case AV_SAMPLE_FMT_S32P:
+ {
+ auto p = reinterpret_cast<int32_t **> (frame->data);
+ for (int i = 0; i < channels; ++i) {
+ for (int j = 0; j < frames; ++j) {
+ data[i][j] = static_cast<float>(p[i][j]) / 2147483648;
+ }
+ }
+ }
+ break;
+
case AV_SAMPLE_FMT_FLT:
{
- float* p = reinterpret_cast<float*> (data[0]);
+ auto p = reinterpret_cast<float*> (frame->data[0]);
int sample = 0;
int channel = 0;
for (int i = 0; i < total_samples; ++i) {
- audio->data(channel)[sample] = *p++;
+ data[channel][sample] = *p++;
++channel;
- if (channel == _ffmpeg_content->audio_channels()) {
+ if (channel == channels) {
channel = 0;
++sample;
}
}
}
break;
-
+
case AV_SAMPLE_FMT_FLTP:
{
- float** p = reinterpret_cast<float**> (data);
- for (int i = 0; i < _ffmpeg_content->audio_channels(); ++i) {
- memcpy (audio->data(i), p[i], frames * sizeof(float));
+ auto p = reinterpret_cast<float**> (frame->data);
+ DCPOMATIC_ASSERT (frame->channels <= channels);
+ /* Sometimes there aren't as many channels in the frame as in the stream */
+ for (int i = 0; i < frame->channels; ++i) {
+ memcpy (data[i], p[i], frames * sizeof(float));
+ }
+ for (int i = frame->channels; i < channels; ++i) {
+ audio->make_silent (i);
}
}
break;
default:
- throw DecodeError (String::compose (_("Unrecognised audio sample format (%1)"), static_cast<int> (audio_sample_format())));
+ throw DecodeError (String::compose(_("Unrecognised audio sample format (%1)"), static_cast<int>(format)));
}
return audio;
}
+
AVSampleFormat
-FFmpegDecoder::audio_sample_format () const
+FFmpegDecoder::audio_sample_format (shared_ptr<FFmpegAudioStream> stream) const
{
- if (!_ffmpeg_content->audio_stream()) {
- return (AVSampleFormat) 0;
- }
-
- return audio_codec_context()->sample_fmt;
+ return static_cast<AVSampleFormat>(stream->stream(_format_context)->codecpar->format);
}
+
int
-FFmpegDecoder::bytes_per_audio_sample () const
+FFmpegDecoder::bytes_per_audio_sample (shared_ptr<FFmpegAudioStream> stream) const
{
- return av_get_bytes_per_sample (audio_sample_format ());
+ return av_get_bytes_per_sample (audio_sample_format (stream));
}
+
void
FFmpegDecoder::seek (ContentTime time, bool accurate)
{
- VideoDecoder::seek (time, accurate);
- AudioDecoder::seek (time, accurate);
-
+ Decoder::seek (time, accurate);
+
/* If we are doing an `accurate' seek, we need to use pre-roll, as
we don't really know what the seek will give us.
*/
- ContentTime pre_roll = accurate ? ContentTime::from_seconds (2) : ContentTime (0);
+ auto pre_roll = accurate ? ContentTime::from_seconds (2) : ContentTime (0);
time -= pre_roll;
/* XXX: it seems debatable whether PTS should be used here...
http://www.mjbshaw.com/2012/04/seeking-in-ffmpeg-know-your-timestamp.html
*/
-
- ContentTime const u = time - _pts_offset;
- int64_t s = u.seconds() / av_q2d (_format_context->streams[_video_stream]->time_base);
- if (_ffmpeg_content->audio_stream ()) {
- s = min (
- s, int64_t (u.seconds() / av_q2d (_ffmpeg_content->audio_stream()->stream(_format_context)->time_base))
- );
+ optional<int> stream;
+
+ if (_video_stream) {
+ stream = _video_stream;
+ } else {
+ DCPOMATIC_ASSERT (_ffmpeg_content->audio);
+ auto s = dynamic_pointer_cast<FFmpegAudioStream>(_ffmpeg_content->audio->stream());
+ if (s) {
+ stream = s->index (_format_context);
+ }
+ }
+
+ DCPOMATIC_ASSERT (stream);
+
+ auto u = time - _pts_offset;
+ if (u < ContentTime ()) {
+ u = ContentTime ();
}
+ av_seek_frame (
+ _format_context,
+ stream.get(),
+ u.seconds() / av_q2d (_format_context->streams[stream.get()]->time_base),
+ AVSEEK_FLAG_BACKWARD
+ );
- av_seek_frame (_format_context, _video_stream, s, 0);
+ {
+ /* Force re-creation of filter graphs to reset them and hence to make sure
+ they don't have any pre-seek frames knocking about.
+ */
+ boost::mutex::scoped_lock lm (_filter_graphs_mutex);
+ _filter_graphs.clear ();
+ }
- avcodec_flush_buffers (video_codec_context());
- if (audio_codec_context ()) {
- avcodec_flush_buffers (audio_codec_context ());
+ if (video_codec_context ()) {
+ avcodec_flush_buffers (video_codec_context());
}
+
+ for (auto i: ffmpeg_content()->ffmpeg_audio_streams()) {
+ avcodec_flush_buffers (_codec_context[i->index(_format_context)]);
+ }
+
if (subtitle_codec_context ()) {
avcodec_flush_buffers (subtitle_codec_context ());
}
+
+ _have_current_subtitle = false;
+
+ for (auto& i: _next_time) {
+ i.second = boost::optional<dcpomatic::ContentTime>();
+ }
}
-void
-FFmpegDecoder::decode_audio_packet ()
+
+shared_ptr<FFmpegAudioStream>
+FFmpegDecoder::audio_stream_from_index (int index) const
{
- /* Audio packets can contain multiple frames, so we may have to call avcodec_decode_audio4
- several times.
- */
-
- AVPacket copy_packet = _packet;
-
- while (copy_packet.size > 0) {
+ /* XXX: inefficient */
+ auto streams = ffmpeg_content()->ffmpeg_audio_streams();
+ auto stream = streams.begin();
+ while (stream != streams.end() && !(*stream)->uses_index(_format_context, index)) {
+ ++stream;
+ }
- int frame_finished;
- int const decode_result = avcodec_decode_audio4 (audio_codec_context(), _frame, &frame_finished, ©_packet);
+ if (stream == streams.end ()) {
+ return {};
+ }
- if (decode_result < 0) {
- LOG_ERROR ("avcodec_decode_audio4 failed (%1)", decode_result);
- return;
+ return *stream;
+}
+
+
+void
+FFmpegDecoder::process_audio_frame (shared_ptr<FFmpegAudioStream> stream)
+{
+ auto frame = audio_frame (stream);
+ auto data = deinterleave_audio (frame);
+
+ ContentTime ct;
+ if (frame->pts == AV_NOPTS_VALUE) {
+ /* In some streams we see not every frame coming through with a timestamp; for those
+ that have AV_NOPTS_VALUE we need to work out the timestamp ourselves. This is
+ particularly noticeable with TrueHD streams (see #1111).
+ */
+ if (_next_time[stream]) {
+ ct = *_next_time[stream];
}
+ } else {
+ ct = ContentTime::from_seconds (
+ frame->best_effort_timestamp *
+ av_q2d (stream->stream(_format_context)->time_base))
+ + _pts_offset;
+ }
- if (frame_finished) {
- ContentTime const ct = ContentTime::from_seconds (
- av_frame_get_best_effort_timestamp (_frame) *
- av_q2d (_ffmpeg_content->audio_stream()->stream (_format_context)->time_base))
- + _pts_offset;
-
- int const data_size = av_samples_get_buffer_size (
- 0, audio_codec_context()->channels, _frame->nb_samples, audio_sample_format (), 1
- );
+ _next_time[stream] = ct + ContentTime::from_frames(data->frames(), stream->frame_rate());
+
+ if (ct < ContentTime()) {
+ /* Discard audio data that comes before time 0 */
+ auto const remove = min (int64_t(data->frames()), (-ct).frames_ceil(double(stream->frame_rate())));
+ data->move (data->frames() - remove, remove, 0);
+ data->set_frames (data->frames() - remove);
+ ct += ContentTime::from_frames (remove, stream->frame_rate());
+ }
- audio (deinterleave_audio (_frame->data, data_size), ct);
+ if (ct < ContentTime()) {
+ LOG_WARNING (
+ "Crazy timestamp %1 for %2 samples in stream %3 (ts=%4 tb=%5, off=%6)",
+ to_string(ct),
+ data->frames(),
+ stream->id(),
+ frame->best_effort_timestamp,
+ av_q2d(stream->stream(_format_context)->time_base),
+ to_string(_pts_offset)
+ );
+ }
+
+ /* Give this data provided there is some, and its time is sane */
+ if (ct >= ContentTime() && data->frames() > 0) {
+ audio->emit (film(), stream, data, ct);
+ }
+}
+
+
+void
+FFmpegDecoder::decode_and_process_audio_packet (AVPacket* packet)
+{
+ auto stream = audio_stream_from_index (packet->stream_index);
+ if (!stream) {
+ return;
+ }
+
+ auto context = _codec_context[stream->index(_format_context)];
+ auto frame = audio_frame (stream);
+
+ int r = avcodec_send_packet (context, packet);
+ if (r < 0) {
+ LOG_WARNING("avcodec_send_packet returned %1 for an audio packet", r);
+ }
+ while (r >= 0) {
+ r = avcodec_receive_frame (context, frame);
+ if (r == AVERROR(EAGAIN)) {
+ /* More input is required */
+ return;
}
-
- copy_packet.data += decode_result;
- copy_packet.size -= decode_result;
+
+ /* We choose to be relaxed here about other errors; it seems that there may be valid
+ * data to decode even if an error occurred. #352 may be related (though this was
+ * when we were using an old version of the FFmpeg API).
+ */
+ process_audio_frame (stream);
}
}
+
bool
-FFmpegDecoder::decode_video_packet ()
+FFmpegDecoder::decode_and_process_video_packet (AVPacket* packet)
{
- int frame_finished;
- if (avcodec_decode_video2 (video_codec_context(), _frame, &frame_finished, &_packet) < 0 || !frame_finished) {
+ DCPOMATIC_ASSERT (_video_stream);
+
+ auto context = video_codec_context();
+
+ int r = avcodec_send_packet (context, packet);
+ if (r < 0) {
+ LOG_WARNING("avcodec_send_packet returned %1 for a video packet", r);
+ }
+
+ r = avcodec_receive_frame (context, _video_frame);
+ if (r == AVERROR(EAGAIN) || r == AVERROR_EOF || (r < 0 && !packet)) {
+ /* More input is required, no more frames are coming, or we are flushing and there was
+ * some error which we just want to ignore.
+ */
return false;
+ } else if (r < 0) {
+ throw DecodeError (N_("avcodec_receive_frame"), N_("FFmpeg::decode_and_process_video_packet"), r);
}
+ /* We assume we'll only get one frame here, which I think is safe */
+
boost::mutex::scoped_lock lm (_filter_graphs_mutex);
- shared_ptr<FilterGraph> graph;
-
- list<shared_ptr<FilterGraph> >::iterator i = _filter_graphs.begin();
- while (i != _filter_graphs.end() && !(*i)->can_process (dcp::Size (_frame->width, _frame->height), (AVPixelFormat) _frame->format)) {
+ shared_ptr<VideoFilterGraph> graph;
+
+ auto i = _filter_graphs.begin();
+ while (i != _filter_graphs.end() && !(*i)->can_process(dcp::Size(_video_frame->width, _video_frame->height), (AVPixelFormat) _video_frame->format)) {
++i;
}
if (i == _filter_graphs.end ()) {
- graph.reset (new FilterGraph (_ffmpeg_content, dcp::Size (_frame->width, _frame->height), (AVPixelFormat) _frame->format));
+ dcp::Fraction vfr (lrint(_ffmpeg_content->video_frame_rate().get() * 1000), 1000);
+ graph = make_shared<VideoFilterGraph>(dcp::Size(_video_frame->width, _video_frame->height), (AVPixelFormat) _video_frame->format, vfr);
+ graph->setup (_ffmpeg_content->filters ());
_filter_graphs.push_back (graph);
- LOG_GENERAL (N_("New graph for %1x%2, pixel format %3"), _frame->width, _frame->height, _frame->format);
+ LOG_GENERAL (N_("New graph for %1x%2, pixel format %3"), _video_frame->width, _video_frame->height, _video_frame->format);
} else {
graph = *i;
}
- list<pair<shared_ptr<Image>, int64_t> > images = graph->process (_frame);
+ auto images = graph->process (_video_frame);
+
+ for (auto const& i: images) {
+
+ auto image = i.first;
- for (list<pair<shared_ptr<Image>, int64_t> >::iterator i = images.begin(); i != images.end(); ++i) {
+ if (i.second != AV_NOPTS_VALUE) {
+ double const pts = i.second * av_q2d(_format_context->streams[_video_stream.get()]->time_base) + _pts_offset.seconds();
- shared_ptr<Image> image = i->first;
-
- if (i->second != AV_NOPTS_VALUE) {
- double const pts = i->second * av_q2d (_format_context->streams[_video_stream]->time_base) + _pts_offset.seconds ();
- video (
- shared_ptr<ImageProxy> (new RawImageProxy (image, _video_content->film()->log())),
- rint (pts * _ffmpeg_content->video_frame_rate ())
+ video->emit (
+ film(),
+ make_shared<RawImageProxy>(image),
+ llrint(pts * _ffmpeg_content->active_video_frame_rate(film()))
);
} else {
- LOG_WARNING ("Dropping frame without PTS");
+ LOG_WARNING_NC ("Dropping frame without PTS");
}
}
return true;
}
-
+
+
void
-FFmpegDecoder::decode_subtitle_packet ()
+FFmpegDecoder::decode_and_process_subtitle_packet (AVPacket* packet)
{
int got_subtitle;
AVSubtitle sub;
- if (avcodec_decode_subtitle2 (subtitle_codec_context(), &sub, &got_subtitle, &_packet) < 0 || !got_subtitle) {
+ if (avcodec_decode_subtitle2 (subtitle_codec_context(), &sub, &got_subtitle, packet) < 0 || !got_subtitle) {
return;
}
- /* Sometimes we get an empty AVSubtitle, which is used by some codecs to
- indicate that the previous subtitle should stop.
- */
+ auto sub_period = subtitle_period (packet, ffmpeg_content()->subtitle_stream()->stream(_format_context), sub);
+
+ /* Stop any current subtitle, either at the time it was supposed to stop, or now if now is sooner */
+ if (_have_current_subtitle) {
+ if (_current_subtitle_to) {
+ only_text()->emit_stop (min(*_current_subtitle_to, sub_period.from + _pts_offset));
+ } else {
+ only_text()->emit_stop (sub_period.from + _pts_offset);
+ }
+ _have_current_subtitle = false;
+ }
+
if (sub.num_rects <= 0) {
- image_subtitle (ContentTimePeriod (), shared_ptr<Image> (), dcpomatic::Rect<double> ());
+ /* Nothing new in this subtitle */
+ avsubtitle_free (&sub);
return;
- } else if (sub.num_rects > 1) {
- throw DecodeError (_("multi-part subtitles not yet supported"));
}
-
+
/* Subtitle PTS (within the source, not taking into account any of the
- source that we may have chopped off for the DCP)
+ source that we may have chopped off for the DCP).
*/
- ContentTimePeriod period = subtitle_period (sub) + _pts_offset;
+ ContentTime from;
+ from = sub_period.from + _pts_offset;
+ if (sub_period.to) {
+ _current_subtitle_to = *sub_period.to + _pts_offset;
+ } else {
+ _current_subtitle_to = optional<ContentTime>();
+ _have_current_subtitle = true;
+ }
- AVSubtitleRect const * rect = sub.rects[0];
+ for (unsigned int i = 0; i < sub.num_rects; ++i) {
+ auto const rect = sub.rects[i];
+
+ switch (rect->type) {
+ case SUBTITLE_NONE:
+ break;
+ case SUBTITLE_BITMAP:
+ process_bitmap_subtitle (rect, from);
+ break;
+ case SUBTITLE_TEXT:
+ cout << "XXX: SUBTITLE_TEXT " << rect->text << "\n";
+ break;
+ case SUBTITLE_ASS:
+ process_ass_subtitle (rect->ass, from);
+ break;
+ }
+ }
- if (rect->type != SUBTITLE_BITMAP) {
- /* XXX */
- // throw DecodeError (_("non-bitmap subtitles not yet supported"));
- return;
+ if (_current_subtitle_to) {
+ only_text()->emit_stop (*_current_subtitle_to);
}
- /* Note RGBA is expressed little-endian, so the first byte in the word is R, second
- G, third B, fourth A.
+ avsubtitle_free (&sub);
+}
+
+
+void
+FFmpegDecoder::process_bitmap_subtitle (AVSubtitleRect const * rect, ContentTime from)
+{
+ /* Note BGRA is expressed little-endian, so the first byte in the word is B, second
+ G, third R, fourth A.
*/
- shared_ptr<Image> image (new Image (PIX_FMT_RGBA, dcp::Size (rect->w, rect->h), true));
+ auto image = make_shared<Image>(AV_PIX_FMT_BGRA, dcp::Size (rect->w, rect->h), Image::Alignment::PADDED);
+#ifdef DCPOMATIC_HAVE_AVSUBTITLERECT_PICT
/* Start of the first line in the subtitle */
- uint8_t* sub_p = rect->pict.data[0];
- /* sub_p looks up into a BGRA palette which is here
+ auto sub_p = rect->pict.data[0];
+ /* sub_p looks up into a BGRA palette which is at rect->pict.data[1];
(i.e. first byte B, second G, third R, fourth A)
*/
- uint32_t const * palette = (uint32_t *) rect->pict.data[1];
+ auto const palette = rect->pict.data[1];
+#else
+ /* Start of the first line in the subtitle */
+ auto sub_p = rect->data[0];
+ /* sub_p looks up into a BGRA palette which is at rect->data[1].
+ (first byte B, second G, third R, fourth A)
+ */
+ auto const* palette = rect->data[1];
+#endif
+ /* And the stream has a map of those palette colours to colours
+ chosen by the user; created a `mapped' palette from those settings.
+ */
+ auto colour_map = ffmpeg_content()->subtitle_stream()->colours();
+ vector<RGBA> mapped_palette (rect->nb_colors);
+ for (int i = 0; i < rect->nb_colors; ++i) {
+ RGBA c (palette[2], palette[1], palette[0], palette[3]);
+ auto j = colour_map.find (c);
+ if (j != colour_map.end ()) {
+ mapped_palette[i] = j->second;
+ } else {
+ /* This colour was not found in the FFmpegSubtitleStream's colour map; probably because
+ it is from a project that was created before this stuff was added. Just use the
+ colour straight from the original palette.
+ */
+ mapped_palette[i] = c;
+ }
+ palette += 4;
+ }
+
/* Start of the output data */
- uint32_t* out_p = (uint32_t *) image->data()[0];
+ auto out_p = image->data()[0];
for (int y = 0; y < rect->h; ++y) {
- uint8_t* sub_line_p = sub_p;
- uint32_t* out_line_p = out_p;
+ auto sub_line_p = sub_p;
+ auto out_line_p = out_p;
for (int x = 0; x < rect->w; ++x) {
- uint32_t const p = palette[*sub_line_p++];
- *out_line_p++ = ((p & 0xff) << 16) | (p & 0xff00) | ((p & 0xff0000) >> 16) | (p & 0xff000000);
+ auto const p = mapped_palette[*sub_line_p++];
+ *out_line_p++ = p.b;
+ *out_line_p++ = p.g;
+ *out_line_p++ = p.r;
+ *out_line_p++ = p.a;
}
+#ifdef DCPOMATIC_HAVE_AVSUBTITLERECT_PICT
sub_p += rect->pict.linesize[0];
- out_p += image->stride()[0] / sizeof (uint32_t);
+#else
+ sub_p += rect->linesize[0];
+#endif
+ out_p += image->stride()[0];
}
- dcp::Size const vs = _ffmpeg_content->video_size ();
-
- image_subtitle (
- period,
- image,
- dcpomatic::Rect<double> (
- static_cast<double> (rect->x) / vs.width,
- static_cast<double> (rect->y) / vs.height,
- static_cast<double> (rect->w) / vs.width,
- static_cast<double> (rect->h) / vs.height
- )
+ int target_width = subtitle_codec_context()->width;
+ if (target_width == 0 && video_codec_context()) {
+ /* subtitle_codec_context()->width == 0 has been seen in the wild but I don't
+ know if it's supposed to mean something from FFmpeg's point of view.
+ */
+ target_width = video_codec_context()->width;
+ }
+ int target_height = subtitle_codec_context()->height;
+ if (target_height == 0 && video_codec_context()) {
+ target_height = video_codec_context()->height;
+ }
+ DCPOMATIC_ASSERT (target_width);
+ DCPOMATIC_ASSERT (target_height);
+ dcpomatic::Rect<double> const scaled_rect (
+ static_cast<double>(rect->x) / target_width,
+ static_cast<double>(rect->y) / target_height,
+ static_cast<double>(rect->w) / target_width,
+ static_cast<double>(rect->h) / target_height
);
-
- avsubtitle_free (&sub);
+
+ only_text()->emit_bitmap_start (from, image, scaled_rect);
}
-list<ContentTimePeriod>
-FFmpegDecoder::subtitles_during (ContentTimePeriod p, bool starting) const
+
+void
+FFmpegDecoder::process_ass_subtitle (string ass, ContentTime from)
{
- return _ffmpeg_content->subtitles_during (p, starting);
+ /* We have no styles and no Format: line, so I'm assuming that FFmpeg
+ produces a single format of Dialogue: lines...
+ */
+
+ int commas = 0;
+ string text;
+ for (size_t i = 0; i < ass.length(); ++i) {
+ if (commas < 9 && ass[i] == ',') {
+ ++commas;
+ } else if (commas == 9) {
+ text += ass[i];
+ }
+ }
+
+ if (text.empty ()) {
+ return;
+ }
+
+ sub::RawSubtitle base;
+ auto raw = sub::SSAReader::parse_line (
+ base,
+ text,
+ _ffmpeg_content->video->size().width,
+ _ffmpeg_content->video->size().height
+ );
+
+ for (auto const& i: sub::collect<vector<sub::Subtitle>>(raw)) {
+ only_text()->emit_plain_start (from, i);
+ }
}
projects / dcpomatic.git / blobdiff