/*
- Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
* @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 "exceptions.h"
#include "image.h"
#include "ffmpeg_content.h"
#include "raw_image_proxy.h"
#include "film.h"
-#include "timer.h"
+#include "compose.hpp"
+extern "C" {
+#include <libavcodec/avcodec.h>
+#include <libavformat/avformat.h>
+}
+#include <boost/foreach.hpp>
+#include <vector>
+#include <iomanip>
+#include <iostream>
+#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);
+#define LOG_GENERAL(...) _log->log (String::compose (__VA_ARGS__), LogEntry::TYPE_GENERAL);
+#define LOG_ERROR(...) _log->log (String::compose (__VA_ARGS__), LogEntry::TYPE_ERROR);
+#define LOG_WARNING_NC(...) _log->log (__VA_ARGS__, LogEntry::TYPE_WARNING);
+#define LOG_WARNING(...) _log->log (String::compose (__VA_ARGS__), LogEntry::TYPE_WARNING);
using std::cout;
-using std::string;
using std::vector;
using std::list;
using std::min;
using std::pair;
-using std::make_pair;
+using std::max;
using boost::shared_ptr;
-using boost::optional;
-using boost::dynamic_pointer_cast;
using dcp::Size;
-FFmpegDecoder::FFmpegDecoder (shared_ptr<const FFmpegContent> c, shared_ptr<Log> log)
+FFmpegDecoder::FFmpegDecoder (shared_ptr<const FFmpegContent> c, shared_ptr<Log> log, bool fast)
: VideoDecoder (c)
- , AudioDecoder (c)
+ , AudioDecoder (c, fast)
, SubtitleDecoder (c)
, FFmpeg (c)
, _log (log)
+ , _pts_offset (pts_offset (c->ffmpeg_audio_streams(), c->first_video(), c->video_frame_rate()))
{
- /* Audio and video frame PTS values may not start with 0. We want
- to fiddle them so that:
-
- 1. One of them starts at time 0.
- 2. The first video PTS value ends up on a frame boundary.
-
- Then we remove big initial gaps in PTS and we allow our
- insertion of black frames to work.
-
- We will do pts_to_use = pts_from_ffmpeg + pts_offset;
- */
-
- 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 */
-
- 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();
- }
- /* 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;
- }
}
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 ();
- }
+
+ decode_audio_packet ();
+ AudioDecoder::flush ();
}
bool
{
int r = av_read_frame (_format_context, &_packet);
- if (r < 0) {
+ /* 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];
}
int const si = _packet.stream_index;
+ shared_ptr<const FFmpegContent> fc = _ffmpeg_content;
- if (si == _video_stream) {
+ if (si == _video_stream && !_ignore_video) {
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)) {
+ } else if (fc->subtitle_stream() && fc->subtitle_stream()->uses_index (_format_context, si)) {
decode_subtitle_packet ();
+ } else {
+ decode_audio_packet ();
}
av_free_packet (&_packet);
* 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 (shared_ptr<FFmpegAudioStream> stream, uint8_t** data, int size)
{
- assert (_ffmpeg_content->audio_channels());
- assert (bytes_per_audio_sample());
+ DCPOMATIC_ASSERT (bytes_per_audio_sample (stream));
/* Deinterleave and convert to float */
- assert ((size % (bytes_per_audio_sample() * _ffmpeg_content->audio_channels())) == 0);
-
- 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));
+ /* total_samples and frames will be rounded down here, so if there are stray samples at the end
+ of the block that do not form a complete sample or frame they will be dropped.
+ */
+ int const total_samples = size / bytes_per_audio_sample (stream);
+ int const frames = total_samples / stream->channels();
+ shared_ptr<AudioBuffers> audio (new AudioBuffers (stream->channels(), frames));
- switch (audio_sample_format()) {
+ switch (audio_sample_format (stream)) {
case AV_SAMPLE_FMT_U8:
{
uint8_t* p = reinterpret_cast<uint8_t *> (data[0]);
audio->data(channel)[sample] = float(*p++) / (1 << 23);
++channel;
- if (channel == _ffmpeg_content->audio_channels()) {
+ if (channel == stream->channels()) {
channel = 0;
++sample;
}
}
}
break;
-
+
case AV_SAMPLE_FMT_S16:
{
int16_t* p = reinterpret_cast<int16_t *> (data[0]);
audio->data(channel)[sample] = float(*p++) / (1 << 15);
++channel;
- if (channel == _ffmpeg_content->audio_channels()) {
+ if (channel == stream->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) {
+ for (int i = 0; i < stream->channels(); ++i) {
for (int j = 0; j < frames; ++j) {
audio->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]);
audio->data(channel)[sample] = static_cast<float>(*p++) / (1 << 31);
++channel;
- if (channel == _ffmpeg_content->audio_channels()) {
+ if (channel == stream->channels()) {
channel = 0;
++sample;
}
audio->data(channel)[sample] = *p++;
++channel;
- if (channel == _ffmpeg_content->audio_channels()) {
+ if (channel == stream->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) {
+ for (int i = 0; i < stream->channels(); ++i) {
memcpy (audio->data(i), p[i], frames * sizeof(float));
}
}
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> (audio_sample_format (stream))));
}
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 stream->stream (_format_context)->codec->sample_fmt;
}
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
{
VideoDecoder::seek (time, accurate);
AudioDecoder::seek (time, accurate);
-
+ SubtitleDecoder::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.
*/
/* 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))
- );
- }
- av_seek_frame (_format_context, _video_stream, s, 0);
+ ContentTime u = time - _pts_offset;
+ if (u < ContentTime ()) {
+ u = ContentTime ();
+ }
+ av_seek_frame (_format_context, _video_stream, u.seconds() / av_q2d (_format_context->streams[_video_stream]->time_base), AVSEEK_FLAG_BACKWARD);
avcodec_flush_buffers (video_codec_context());
- if (audio_codec_context ()) {
- avcodec_flush_buffers (audio_codec_context ());
- }
+
+ /* XXX: should be flushing audio buffers? */
+
if (subtitle_codec_context ()) {
avcodec_flush_buffers (subtitle_codec_context ());
}
/* Audio packets can contain multiple frames, so we may have to call avcodec_decode_audio4
several times.
*/
-
+
AVPacket copy_packet = _packet;
-
+
+ /* XXX: inefficient */
+ vector<shared_ptr<FFmpegAudioStream> > streams = ffmpeg_content()->ffmpeg_audio_streams ();
+ vector<shared_ptr<FFmpegAudioStream> >::const_iterator stream = streams.begin ();
+ while (stream != streams.end () && !(*stream)->uses_index (_format_context, copy_packet.stream_index)) {
+ ++stream;
+ }
+
+ if (stream == streams.end ()) {
+ /* The packet's stream may not be an audio one; just ignore it in this method if so */
+ return;
+ }
+
while (copy_packet.size > 0) {
int frame_finished;
- int const decode_result = avcodec_decode_audio4 (audio_codec_context(), _frame, &frame_finished, ©_packet);
-
+ int decode_result = avcodec_decode_audio4 ((*stream)->stream (_format_context)->codec, _frame, &frame_finished, ©_packet);
if (decode_result < 0) {
- LOG_ERROR ("avcodec_decode_audio4 failed (%1)", decode_result);
- return;
+ /* avcodec_decode_audio4 can sometimes return an error even though it has decoded
+ some valid data; for example dca_subframe_footer can return AVERROR_INVALIDDATA
+ if it overreads the auxiliary data. ffplay carries on if frame_finished is true,
+ even in the face of such an error, so I think we should too.
+
+ Returning from the method here caused mantis #352.
+ */
+ LOG_WARNING ("avcodec_decode_audio4 failed (%1)", decode_result);
+
+ /* Fudge decode_result so that we come out of the while loop when
+ we've processed this data.
+ */
+ decode_result = copy_packet.size;
}
if (frame_finished) {
- ContentTime const ct = ContentTime::from_seconds (
+ ContentTime ct = ContentTime::from_seconds (
av_frame_get_best_effort_timestamp (_frame) *
- av_q2d (_ffmpeg_content->audio_stream()->stream (_format_context)->time_base))
+ av_q2d ((*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
+ 0, (*stream)->stream(_format_context)->codec->channels, _frame->nb_samples, audio_sample_format (*stream), 1
);
- audio (deinterleave_audio (_frame->data, data_size), ct);
+ shared_ptr<AudioBuffers> data = deinterleave_audio (*stream, _frame->data, data_size);
+
+ if (ct < ContentTime ()) {
+ /* Discard audio data that comes before time 0 */
+ Frame const remove = min (int64_t (data->frames()), (-ct).frames_ceil(double((*stream)->frame_rate ())));
+ data->move (remove, 0, data->frames() - remove);
+ data->set_frames (data->frames() - remove);
+ ct += ContentTime::from_frames (remove, (*stream)->frame_rate ());
+ }
+
+ if (data->frames() > 0) {
+ audio (*stream, data, ct);
+ }
}
-
+
copy_packet.data += decode_result;
copy_packet.size -= decode_result;
}
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)) {
++i;
for (list<pair<shared_ptr<Image>, int64_t> >::iterator i = images.begin(); i != images.end(); ++i) {
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 ())
+ shared_ptr<ImageProxy> (new RawImageProxy (image)),
+ llrint (pts * _ffmpeg_content->video_frame_rate ())
);
} else {
- LOG_WARNING ("Dropping frame without PTS");
+ LOG_WARNING_NC ("Dropping frame without PTS");
}
}
return true;
}
-
+
void
FFmpegDecoder::decode_subtitle_packet ()
{
return;
}
- /* Sometimes we get an empty AVSubtitle, which is used by some codecs to
- indicate that the previous subtitle should stop.
- */
if (sub.num_rects <= 0) {
- image_subtitle (ContentTimePeriod (), shared_ptr<Image> (), dcpomatic::Rect<double> ());
+ /* Sometimes we get an empty AVSubtitle, which is used by some codecs to
+ indicate that the previous subtitle should stop. We can ignore it here.
+ */
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;
-
- AVSubtitleRect const * rect = sub.rects[0];
+ FFmpegSubtitlePeriod sub_period = subtitle_period (sub);
+ ContentTimePeriod period;
+ period.from = sub_period.from + _pts_offset;
+ if (sub_period.to) {
+ /* We already know the subtitle period `to' time */
+ period.to = sub_period.to.get() + _pts_offset;
+ } else {
+ /* We have to look up the `to' time in the stream's records */
+ period.to = ffmpeg_content()->subtitle_stream()->find_subtitle_to (period.from);
+ }
- if (rect->type != SUBTITLE_BITMAP) {
- /* XXX */
- // throw DecodeError (_("non-bitmap subtitles not yet supported"));
- return;
+ for (unsigned int i = 0; i < sub.num_rects; ++i) {
+ AVSubtitleRect const * rect = sub.rects[i];
+
+ switch (rect->type) {
+ case SUBTITLE_NONE:
+ break;
+ case SUBTITLE_BITMAP:
+ decode_bitmap_subtitle (rect, period);
+ break;
+ case SUBTITLE_TEXT:
+ cout << "XXX: SUBTITLE_TEXT " << rect->text << "\n";
+ break;
+ case SUBTITLE_ASS:
+ cout << "XXX: SUBTITLE_ASS " << rect->ass << "\n";
+ break;
+ }
}
+ avsubtitle_free (&sub);
+}
+
+list<ContentTimePeriod>
+FFmpegDecoder::image_subtitles_during (ContentTimePeriod p, bool starting) const
+{
+ return _ffmpeg_content->subtitles_during (p, starting);
+}
+
+list<ContentTimePeriod>
+FFmpegDecoder::text_subtitles_during (ContentTimePeriod, bool) const
+{
+ return list<ContentTimePeriod> ();
+}
+
+void
+FFmpegDecoder::decode_bitmap_subtitle (AVSubtitleRect const * rect, ContentTimePeriod period)
+{
/* Note RGBA is expressed little-endian, so the first byte in the word is R, second
G, third B, fourth A.
*/
}
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
- )
+ dcpomatic::Rect<double> const scaled_rect (
+ 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
);
-
- avsubtitle_free (&sub);
-}
-list<ContentTimePeriod>
-FFmpegDecoder::subtitles_during (ContentTimePeriod p, bool starting) const
-{
- return _ffmpeg_content->subtitles_during (p, starting);
+ image_subtitle (period, image, scaled_rect);
}
projects / dcpomatic.git / blobdiff