+/* -*- c-basic-offset: 8; default-tab-width: 8; -*- */
+
/*
Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
#include "transcoder.h"
#include "job.h"
#include "filter.h"
-#include "options.h"
#include "exceptions.h"
#include "image.h"
#include "util.h"
#include "ffmpeg_decoder.h"
#include "filter_graph.h"
#include "subtitle.h"
+#include "audio_buffers.h"
+
+#include "i18n.h"
using std::cout;
using std::string;
using boost::shared_ptr;
using boost::optional;
using boost::dynamic_pointer_cast;
+using libdcp::Size;
+
+boost::mutex FFmpegDecoder::_mutex;
-FFmpegDecoder::FFmpegDecoder (shared_ptr<Film> f, shared_ptr<const Options> o, Job* j)
- : Decoder (f, o, j)
- , VideoDecoder (f, o, j)
- , AudioDecoder (f, o, j)
+FFmpegDecoder::FFmpegDecoder (shared_ptr<const Film> f, shared_ptr<const FFmpegContent> c, bool video, bool audio, bool subtitles)
+ : Decoder (f)
+ , VideoDecoder (f)
+ , AudioDecoder (f, c)
+ , _ffmpeg_content (c)
, _format_context (0)
, _video_stream (-1)
, _frame (0)
, _audio_codec (0)
, _subtitle_codec_context (0)
, _subtitle_codec (0)
+ , _decode_video (video)
+ , _decode_audio (audio)
+ , _decode_subtitles (subtitles)
{
setup_general ();
setup_video ();
FFmpegDecoder::~FFmpegDecoder ()
{
+ boost::mutex::scoped_lock lm (_mutex);
+
if (_audio_codec_context) {
avcodec_close (_audio_codec_context);
}
-
+
if (_video_codec_context) {
avcodec_close (_video_codec_context);
}
{
av_register_all ();
- if (avformat_open_input (&_format_context, _film->content_path().c_str(), 0, 0) < 0) {
- throw OpenFileError (_film->content_path ());
+ if (avformat_open_input (&_format_context, _ffmpeg_content->file().string().c_str(), 0, 0) < 0) {
+ throw OpenFileError (_ffmpeg_content->file().string ());
}
if (avformat_find_stream_info (_format_context, 0) < 0) {
- throw DecodeError ("could not find stream information");
+ throw DecodeError (_("could not find stream information"));
}
- /* Find video, audio and subtitle streams and choose the first of each */
+ /* Find video, audio and subtitle streams */
for (uint32_t i = 0; i < _format_context->nb_streams; ++i) {
AVStream* s = _format_context->streams[i];
/* This is a hack; sometimes it seems that _audio_codec_context->channel_layout isn't set up,
so bodge it here. No idea why we should have to do this.
*/
-
+
if (s->codec->channel_layout == 0) {
s->codec->channel_layout = av_get_default_channel_layout (s->codec->channels);
}
_audio_streams.push_back (
- shared_ptr<AudioStream> (
- new FFmpegAudioStream (stream_name (s), i, s->codec->sample_rate, s->codec->channel_layout)
- )
+ FFmpegAudioStream (stream_name (s), i, s->codec->sample_rate, s->codec->channels)
);
-
+
} else if (s->codec->codec_type == AVMEDIA_TYPE_SUBTITLE) {
- _subtitle_streams.push_back (
- shared_ptr<SubtitleStream> (
- new SubtitleStream (stream_name (s), i)
- )
- );
+ _subtitle_streams.push_back (FFmpegSubtitleStream (stream_name (s), i));
}
}
if (_video_stream < 0) {
- throw DecodeError ("could not find video stream");
+ throw DecodeError (N_("could not find video stream"));
}
_frame = avcodec_alloc_frame ();
if (_frame == 0) {
- throw DecodeError ("could not allocate frame");
+ throw DecodeError (N_("could not allocate frame"));
}
}
void
FFmpegDecoder::setup_video ()
{
+ boost::mutex::scoped_lock lm (_mutex);
+
_video_codec_context = _format_context->streams[_video_stream]->codec;
_video_codec = avcodec_find_decoder (_video_codec_context->codec_id);
if (_video_codec == 0) {
- throw DecodeError ("could not find video decoder");
+ throw DecodeError (_("could not find video decoder"));
}
- /* I think this prevents problems with green hash on decodes and
- "changing frame properties on the fly is not supported by all filters"
- messages with some content. Although I'm not sure; needs checking.
- */
- AVDictionary* opts = 0;
- av_dict_set (&opts, "threads", "1", 0);
-
- if (avcodec_open2 (_video_codec_context, _video_codec, &opts) < 0) {
- throw DecodeError ("could not open video decoder");
+ if (avcodec_open2 (_video_codec_context, _video_codec, 0) < 0) {
+ throw DecodeError (N_("could not open video decoder"));
}
}
void
FFmpegDecoder::setup_audio ()
{
- if (!_audio_stream) {
+ boost::mutex::scoped_lock lm (_mutex);
+
+ if (!_ffmpeg_content->audio_stream ()) {
return;
}
- shared_ptr<FFmpegAudioStream> ffa = dynamic_pointer_cast<FFmpegAudioStream> (_audio_stream);
- assert (ffa);
-
- _audio_codec_context = _format_context->streams[ffa->id()]->codec;
+ _audio_codec_context = _format_context->streams[_ffmpeg_content->audio_stream()->id]->codec;
_audio_codec = avcodec_find_decoder (_audio_codec_context->codec_id);
if (_audio_codec == 0) {
- throw DecodeError ("could not find audio decoder");
+ throw DecodeError (_("could not find audio decoder"));
}
if (avcodec_open2 (_audio_codec_context, _audio_codec, 0) < 0) {
- throw DecodeError ("could not open audio decoder");
+ throw DecodeError (N_("could not open audio decoder"));
}
}
void
FFmpegDecoder::setup_subtitle ()
{
- if (!_subtitle_stream) {
+ boost::mutex::scoped_lock lm (_mutex);
+
+ if (!_ffmpeg_content->subtitle_stream() || _ffmpeg_content->subtitle_stream()->id >= int (_format_context->nb_streams)) {
return;
}
- _subtitle_codec_context = _format_context->streams[_subtitle_stream->id()]->codec;
+ _subtitle_codec_context = _format_context->streams[_ffmpeg_content->subtitle_stream()->id]->codec;
_subtitle_codec = avcodec_find_decoder (_subtitle_codec_context->codec_id);
if (_subtitle_codec == 0) {
- throw DecodeError ("could not find subtitle decoder");
+ throw DecodeError (_("could not find subtitle decoder"));
}
if (avcodec_open2 (_subtitle_codec_context, _subtitle_codec, 0) < 0) {
- throw DecodeError ("could not open subtitle decoder");
+ throw DecodeError (N_("could not open subtitle decoder"));
}
}
FFmpegDecoder::pass ()
{
int r = av_read_frame (_format_context, &_packet);
-
+
if (r < 0) {
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));
- _film->log()->log (String::compose ("error on av_read_frame (%1) (%2)", buf, r));
+ _film->log()->log (String::compose (N_("error on av_read_frame (%1) (%2)"), buf, r));
}
-
+
/* Get any remaining frames */
_packet.data = 0;
_packet.size = 0;
-
+
/* XXX: should we reset _packet.data and size after each *_decode_* call? */
-
- int frame_finished;
-
- while (avcodec_decode_video2 (_video_codec_context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) {
- filter_and_emit_video (_frame);
+
+ if (_decode_video) {
+ while (decode_video_packet ());
}
- if (_audio_stream && _opt->decode_audio) {
- while (avcodec_decode_audio4 (_audio_codec_context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) {
- int const data_size = av_samples_get_buffer_size (
- 0, _audio_codec_context->channels, _frame->nb_samples, audio_sample_format (), 1
- );
-
- assert (_audio_codec_context->channels == _film->audio_channels());
- Audio (deinterleave_audio (_frame->data[0], data_size));
- }
+ if (_ffmpeg_content->audio_stream() && _decode_audio) {
+ decode_audio_packet ();
}
-
+
return true;
}
avcodec_get_frame_defaults (_frame);
- shared_ptr<FFmpegAudioStream> ffa = dynamic_pointer_cast<FFmpegAudioStream> (_audio_stream);
-
- if (_packet.stream_index == _video_stream) {
-
- int frame_finished;
- int const r = avcodec_decode_video2 (_video_codec_context, _frame, &frame_finished, &_packet);
- if (r >= 0 && frame_finished) {
-
- if (r != _packet.size) {
- _film->log()->log (String::compose ("Used only %1 bytes of %2 in packet", r, _packet.size));
- }
-
- /* Where we are in the output, in seconds */
- double const out_pts_seconds = video_frame() / frames_per_second();
-
- /* Where we are in the source, in seconds */
- double const source_pts_seconds = av_q2d (_format_context->streams[_packet.stream_index]->time_base)
- * av_frame_get_best_effort_timestamp(_frame);
-
- _film->log()->log (
- String::compose ("Source video frame ready; source at %1, output at %2", source_pts_seconds, out_pts_seconds),
- Log::VERBOSE
- );
-
- if (!_first_video) {
- _first_video = source_pts_seconds;
- }
-
- /* Difference between where we are and where we should be */
- double const delta = source_pts_seconds - _first_video.get() - out_pts_seconds;
- double const one_frame = 1 / frames_per_second();
-
- /* Insert frames if required to get out_pts_seconds up to pts_seconds */
- if (delta > one_frame) {
- int const extra = rint (delta / one_frame);
- for (int i = 0; i < extra; ++i) {
- repeat_last_video ();
- _film->log()->log (
- String::compose (
- "Extra video frame inserted at %1s; source frame %2, source PTS %3 (at %4 fps)",
- out_pts_seconds, video_frame(), source_pts_seconds, frames_per_second()
- )
- );
- }
- }
-
- if (delta > -one_frame) {
- /* Process this frame */
- filter_and_emit_video (_frame);
- } else {
- /* Otherwise we are omitting a frame to keep things right */
- _film->log()->log (String::compose ("Frame removed at %1s", out_pts_seconds));
- }
- }
-
- } else if (ffa && _packet.stream_index == ffa->id() && _opt->decode_audio) {
-
- int frame_finished;
- if (avcodec_decode_audio4 (_audio_codec_context, _frame, &frame_finished, &_packet) >= 0 && frame_finished) {
-
- /* Where we are in the source, in seconds */
- double const source_pts_seconds = av_q2d (_format_context->streams[_packet.stream_index]->time_base)
- * av_frame_get_best_effort_timestamp(_frame);
-
- /* We only decode audio if we've had our first video packet through, and if it
- was before this packet. Until then audio is thrown away.
- */
-
- if (_first_video && _first_video.get() <= source_pts_seconds) {
-
- if (!_first_audio) {
- _first_audio = source_pts_seconds;
-
- /* This is our first audio frame, and if we've arrived here we must have had our
- first video frame. Push some silence to make up any gap between our first
- video frame and our first audio.
- */
-
- /* frames of silence that we must push */
- int const s = rint ((_first_audio.get() - _first_video.get()) * ffa->sample_rate ());
-
- _film->log()->log (
- String::compose (
- "First video at %1, first audio at %2, pushing %3 audio frames of silence for %4 channels (%5 bytes per sample)",
- _first_video.get(), _first_audio.get(), s, ffa->channels(), bytes_per_audio_sample()
- )
- );
-
- if (s) {
- shared_ptr<AudioBuffers> audio (new AudioBuffers (ffa->channels(), s));
- audio->make_silent ();
- Audio (audio);
- }
- }
-
- int const data_size = av_samples_get_buffer_size (
- 0, _audio_codec_context->channels, _frame->nb_samples, audio_sample_format (), 1
- );
-
- assert (_audio_codec_context->channels == _film->audio_channels());
- Audio (deinterleave_audio (_frame->data[0], data_size));
- }
- }
-
- } else if (_subtitle_stream && _packet.stream_index == _subtitle_stream->id() && _opt->decode_subtitles && _first_video) {
+ if (_packet.stream_index == _video_stream && _decode_video) {
+ decode_video_packet ();
+ } else if (_ffmpeg_content->audio_stream() && _packet.stream_index == _ffmpeg_content->audio_stream()->id && _decode_audio) {
+ decode_audio_packet ();
+ } else if (_ffmpeg_content->subtitle_stream() && _packet.stream_index == _ffmpeg_content->subtitle_stream()->id && _decode_subtitles) {
int got_subtitle;
AVSubtitle sub;
if (sub.num_rects > 0) {
shared_ptr<TimedSubtitle> ts;
try {
- emit_subtitle (shared_ptr<TimedSubtitle> (new TimedSubtitle (sub, _first_video.get())));
+ emit_subtitle (shared_ptr<TimedSubtitle> (new TimedSubtitle (sub)));
} catch (...) {
/* some problem with the subtitle; we probably didn't understand it */
}
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 (uint8_t** data, int size)
{
- assert (_film->audio_channels());
+ assert (_ffmpeg_content->audio_channels());
assert (bytes_per_audio_sample());
- shared_ptr<FFmpegAudioStream> ffa = dynamic_pointer_cast<FFmpegAudioStream> (_audio_stream);
- assert (ffa);
-
/* Deinterleave and convert to float */
- assert ((size % (bytes_per_audio_sample() * ffa->channels())) == 0);
+ 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 / _film->audio_channels();
- shared_ptr<AudioBuffers> audio (new AudioBuffers (ffa->channels(), frames));
+ int const frames = total_samples / _ffmpeg_content->audio_channels();
+ shared_ptr<AudioBuffers> audio (new AudioBuffers (_ffmpeg_content->audio_channels(), frames));
switch (audio_sample_format()) {
case AV_SAMPLE_FMT_S16:
{
- int16_t* p = (int16_t *) data;
+ int16_t* p = reinterpret_cast<int16_t *> (data[0]);
int sample = 0;
int channel = 0;
for (int i = 0; i < total_samples; ++i) {
audio->data(channel)[sample] = float(*p++) / (1 << 15);
++channel;
- if (channel == _film->audio_channels()) {
+ if (channel == _ffmpeg_content->audio_channels()) {
channel = 0;
++sample;
}
}
break;
+ 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 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 = (int32_t *) data;
+ int32_t* p = reinterpret_cast<int32_t *> (data[0]);
int sample = 0;
int channel = 0;
for (int i = 0; i < total_samples; ++i) {
- audio->data(channel)[sample] = float(*p++) / (1 << 31);
+ audio->data(channel)[sample] = static_cast<float>(*p++) / (1 << 31);
++channel;
- if (channel == _film->audio_channels()) {
+ if (channel == _ffmpeg_content->audio_channels()) {
channel = 0;
++sample;
}
case AV_SAMPLE_FMT_FLT:
{
- float* p = reinterpret_cast<float*> (data);
+ float* p = reinterpret_cast<float*> (data[0]);
int sample = 0;
int channel = 0;
for (int i = 0; i < total_samples; ++i) {
audio->data(channel)[sample] = *p++;
++channel;
- if (channel == _film->audio_channels()) {
+ if (channel == _ffmpeg_content->audio_channels()) {
channel = 0;
++sample;
}
case AV_SAMPLE_FMT_FLTP:
{
- float* p = reinterpret_cast<float*> (data);
- for (int i = 0; i < _film->audio_channels(); ++i) {
- memcpy (audio->data(i), p, frames * sizeof(float));
- p += frames;
+ 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));
}
}
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())));
}
return audio;
}
float
-FFmpegDecoder::frames_per_second () const
+FFmpegDecoder::video_frame_rate () const
{
AVStream* s = _format_context->streams[_video_stream];
return _audio_codec_context->sample_fmt;
}
-Size
+libdcp::Size
FFmpegDecoder::native_size () const
{
- return Size (_video_codec_context->width, _video_codec_context->height);
+ return libdcp::Size (_video_codec_context->width, _video_codec_context->height);
}
PixelFormat
FFmpegDecoder::stream_name (AVStream* s) const
{
stringstream n;
-
- AVDictionaryEntry const * lang = av_dict_get (s->metadata, "language", 0, 0);
- if (lang) {
- n << lang->value;
- }
-
- AVDictionaryEntry const * title = av_dict_get (s->metadata, "title", 0, 0);
- if (title) {
- if (!n.str().empty()) {
- n << " ";
+
+ if (s->metadata) {
+ AVDictionaryEntry const * lang = av_dict_get (s->metadata, N_("language"), 0, 0);
+ if (lang) {
+ n << lang->value;
+ }
+
+ AVDictionaryEntry const * title = av_dict_get (s->metadata, N_("title"), 0, 0);
+ if (title) {
+ if (!n.str().empty()) {
+ n << N_(" ");
+ }
+ n << title->value;
}
- n << title->value;
}
if (n.str().empty()) {
- n << "unknown";
+ n << N_("unknown");
}
return n.str ();
return av_get_bytes_per_sample (audio_sample_format ());
}
-void
-FFmpegDecoder::set_audio_stream (shared_ptr<AudioStream> s)
+bool
+FFmpegDecoder::seek (double p)
{
- AudioDecoder::set_audio_stream (s);
- setup_audio ();
+ return do_seek (p, false, false);
}
-void
-FFmpegDecoder::set_subtitle_stream (shared_ptr<SubtitleStream> s)
+bool
+FFmpegDecoder::seek_back ()
{
- VideoDecoder::set_subtitle_stream (s);
- setup_subtitle ();
+ if (last_content_time() < 2.5) {
+ return true;
+ }
+
+ return do_seek (last_content_time() - 2.5 / video_frame_rate(), true, true);
}
-void
-FFmpegDecoder::filter_and_emit_video (AVFrame* frame)
+bool
+FFmpegDecoder::seek_forward ()
{
- shared_ptr<FilterGraph> graph;
-
- list<shared_ptr<FilterGraph> >::iterator i = _filter_graphs.begin();
- while (i != _filter_graphs.end() && !(*i)->can_process (Size (frame->width, frame->height), (AVPixelFormat) frame->format)) {
- ++i;
+ if (last_content_time() >= (video_length() - video_frame_rate())) {
+ return true;
}
+
+ return do_seek (last_content_time() - 0.5 / video_frame_rate(), true, true);
+}
- if (i == _filter_graphs.end ()) {
- graph.reset (new FilterGraph (_film, this, _opt->apply_crop, Size (frame->width, frame->height), (AVPixelFormat) frame->format));
- _filter_graphs.push_back (graph);
- _film->log()->log (String::compose ("New graph for %1x%2, pixel format %3", frame->width, frame->height, frame->format));
- } else {
- graph = *i;
- }
+bool
+FFmpegDecoder::do_seek (double p, bool backwards, bool accurate)
+{
+ int64_t const vt = p / av_q2d (_format_context->streams[_video_stream]->time_base);
- list<shared_ptr<Image> > images = graph->process (frame);
+ int const r = av_seek_frame (_format_context, _video_stream, vt, backwards ? AVSEEK_FLAG_BACKWARD : 0);
- for (list<shared_ptr<Image> >::iterator i = images.begin(); i != images.end(); ++i) {
- emit_video (*i);
+ avcodec_flush_buffers (_video_codec_context);
+ if (_subtitle_codec_context) {
+ avcodec_flush_buffers (_subtitle_codec_context);
}
+
+ if (accurate) {
+ while (1) {
+ int r = av_read_frame (_format_context, &_packet);
+ if (r < 0) {
+ return true;
+ }
+
+ avcodec_get_frame_defaults (_frame);
+
+ if (_packet.stream_index == _video_stream) {
+ int finished = 0;
+ int const r = avcodec_decode_video2 (_video_codec_context, _frame, &finished, &_packet);
+ if (r >= 0 && finished) {
+ int64_t const bet = av_frame_get_best_effort_timestamp (_frame);
+ if (bet > vt) {
+ break;
+ }
+ }
+ }
+
+ av_free_packet (&_packet);
+ }
+ }
+
+ return r < 0;
}
-shared_ptr<FFmpegAudioStream>
-FFmpegAudioStream::create (string t, optional<int> v)
+void
+FFmpegDecoder::film_changed (Film::Property p)
{
- if (!v) {
- /* version < 1; no type in the string, and there's only FFmpeg streams anyway */
- return shared_ptr<FFmpegAudioStream> (new FFmpegAudioStream (t, v));
+ switch (p) {
+ case Film::CROP:
+ case Film::FILTERS:
+ {
+ boost::mutex::scoped_lock lm (_filter_graphs_mutex);
+ _filter_graphs.clear ();
}
+ break;
- stringstream s (t);
- string type;
- s >> type;
- if (type != "ffmpeg") {
- return shared_ptr<FFmpegAudioStream> ();
+ default:
+ break;
}
+}
- return shared_ptr<FFmpegAudioStream> (new FFmpegAudioStream (t, v));
+/** @return Length (in video frames) according to our content's header */
+ContentVideoFrame
+FFmpegDecoder::video_length () const
+{
+ return (double(_format_context->duration) / AV_TIME_BASE) * video_frame_rate();
}
-FFmpegAudioStream::FFmpegAudioStream (string t, optional<int> version)
+void
+FFmpegDecoder::decode_audio_packet ()
{
- stringstream n (t);
+ /* Audio packets can contain multiple frames, so we may have to call avcodec_decode_audio4
+ several times.
+ */
- int name_index = 4;
- if (!version) {
- name_index = 2;
- int channels;
- n >> _id >> channels;
- _channel_layout = av_get_default_channel_layout (channels);
- _sample_rate = 0;
- } else {
- string type;
- /* Current (marked version 1) */
- n >> type >> _id >> _sample_rate >> _channel_layout;
- assert (type == "ffmpeg");
- }
+ AVPacket copy_packet = _packet;
+
+ while (copy_packet.size > 0) {
- for (int i = 0; i < name_index; ++i) {
- size_t const s = t.find (' ');
- if (s != string::npos) {
- t = t.substr (s + 1);
+ int frame_finished;
+ int const decode_result = avcodec_decode_audio4 (_audio_codec_context, _frame, &frame_finished, ©_packet);
+ if (decode_result >= 0) {
+ if (frame_finished) {
+
+ /* Where we are in the source, in seconds */
+ double const source_pts_seconds = av_q2d (_format_context->streams[copy_packet.stream_index]->time_base)
+ * av_frame_get_best_effort_timestamp(_frame);
+
+ int const data_size = av_samples_get_buffer_size (
+ 0, _audio_codec_context->channels, _frame->nb_samples, audio_sample_format (), 1
+ );
+
+ assert (_audio_codec_context->channels == _ffmpeg_content->audio_channels());
+ Audio (deinterleave_audio (_frame->data, data_size), source_pts_seconds);
+ }
+
+ copy_packet.data += decode_result;
+ copy_packet.size -= decode_result;
}
}
-
- _name = t;
}
-string
-FFmpegAudioStream::to_string () const
+bool
+FFmpegDecoder::decode_video_packet ()
{
- return String::compose ("ffmpeg %1 %2 %3 %4", _id, _sample_rate, _channel_layout, _name);
-}
+ int frame_finished;
+ if (avcodec_decode_video2 (_video_codec_context, _frame, &frame_finished, &_packet) < 0 || !frame_finished) {
+ return false;
+ }
+
+ 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 (libdcp::Size (_frame->width, _frame->height), (AVPixelFormat) _frame->format)) {
+ ++i;
+ }
+
+ if (i == _filter_graphs.end ()) {
+ graph.reset (new FilterGraph (_film, this, libdcp::Size (_frame->width, _frame->height), (AVPixelFormat) _frame->format));
+ _filter_graphs.push_back (graph);
+ _film->log()->log (String::compose (N_("New graph for %1x%2, pixel format %3"), _frame->width, _frame->height, _frame->format));
+ } else {
+ graph = *i;
+ }
+
+ list<shared_ptr<Image> > images = graph->process (_frame);
+
+ for (list<shared_ptr<Image> >::iterator i = images.begin(); i != images.end(); ++i) {
+ int64_t const bet = av_frame_get_best_effort_timestamp (_frame);
+ if (bet != AV_NOPTS_VALUE) {
+ /* XXX: may need to insert extra frames / remove frames here ...
+ (as per old Matcher)
+ */
+ emit_video (*i, false, bet * av_q2d (_format_context->streams[_video_stream]->time_base) * TIME_HZ);
+ } else {
+ _film->log()->log ("Dropping frame without PTS");
+ }
+ }
+ return true;
+}
projects / dcpomatic.git / blobdiff