/** @param f Film.
* @param o Options.
* @param j Job that we are running within, or 0
- * @param minimal true to do the bare minimum of work; just run through the content. Useful for acquiring
- * accurate frame counts as quickly as possible. This generates no video or audio output.
*/
Decoder::Decoder (boost::shared_ptr<Film> f, boost::shared_ptr<const Options> o, Job* j)
: _film (f)
, _opt (o)
, _job (j)
- , _video_frame (0)
{
}
-
-/** Start decoding */
-void
-Decoder::go ()
-{
- if (_job && !_film->dcp_length()) {
- _job->set_progress_unknown ();
- }
-
- while (pass () == false) {
- if (_job && _film->dcp_length()) {
- _job->set_progress (float (_video_frame) / _film->length().get());
- }
- }
-}
-
-/** Called to tell the world that some audio data is ready
- * @param audio Audio data.
- */
-void
-Decoder::process_audio (shared_ptr<AudioBuffers> audio)
-{
- /* Maybe apply gain */
- if (_film->audio_gain() != 0) {
- float const linear_gain = pow (10, _film->audio_gain() / 20);
- for (int i = 0; i < audio->channels(); ++i) {
- for (int j = 0; j < audio->frames(); ++j) {
- audio->data(i)[j] *= linear_gain;
- }
- }
- }
-
- Audio (audio);
-}
-
-/** Called by subclasses to tell the world that some video data is ready.
- * We do some post-processing / filtering then emit it for listeners.
- * @param frame to decode; caller manages memory.
- */
-void
-Decoder::process_video (AVFrame* frame)
-{
- 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 (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;
- }
-
- list<shared_ptr<Image> > images = graph->process (frame);
-
- for (list<shared_ptr<Image> >::iterator i = images.begin(); i != images.end(); ++i) {
- shared_ptr<Subtitle> sub;
- if (_timed_subtitle && _timed_subtitle->displayed_at (double (video_frame()) / _film->frames_per_second())) {
- sub = _timed_subtitle->subtitle ();
- }
-
- emit_video (*i, sub);
- }
-}
-
-void
-Decoder::repeat_last_video ()
-{
- if (!_last_image) {
- _last_image.reset (new CompactImage (pixel_format(), native_size()));
- _last_image->make_black ();
- }
-
- emit_video (_last_image, _last_subtitle);
-}
-
-void
-Decoder::emit_video (shared_ptr<Image> image, shared_ptr<Subtitle> sub)
-{
- TIMING ("Decoder emits %1", _video_frame);
- Video (image, sub);
- ++_video_frame;
-
- _last_image = image;
- _last_subtitle = sub;
-}
-
-void
-Decoder::process_subtitle (shared_ptr<TimedSubtitle> s)
-{
- _timed_subtitle = s;
-
- if (_timed_subtitle && _opt->apply_crop) {
- Position const p = _timed_subtitle->subtitle()->position ();
- _timed_subtitle->subtitle()->set_position (Position (p.x - _film->crop().left, p.y - _film->crop().top));
- }
-}
-
-void
-Decoder::set_audio_stream (optional<AudioStream> s)
-{
- _audio_stream = s;
-}
-
-void
-Decoder::set_subtitle_stream (optional<SubtitleStream> s)
-{
- _subtitle_stream = s;
-}