X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fdecoder.cc;h=50770834586f10c1cb5405d7846fa2696d26fd66;hb=1f2bc4d8f3601ad1e12b94f37b3889fcd003509b;hp=347c5dbbb909521f1349f346dce7922c73cc5622;hpb=ca4d051ceafb77c281583c4e50b391f230544313;p=dcpomatic.git diff --git a/src/lib/decoder.cc b/src/lib/decoder.cc index 347c5dbbb..507708345 100644 --- a/src/lib/decoder.cc +++ b/src/lib/decoder.cc @@ -43,273 +43,22 @@ using std::min; using std::pair; using std::list; using boost::shared_ptr; +using boost::optional; /** @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 f, boost::shared_ptr o, Job* j) +Decoder::Decoder (boost::shared_ptr f, boost::shared_ptr o, Job* j) : _film (f) , _opt (o) , _job (j) - , _video_frame (0) - , _audio_frame (0) - , _delay_line (0) - , _delay_in_frames (0) { } -Decoder::~Decoder () +bool +Decoder::seek (SourceFrame f) { - delete _delay_line; -} - -/** Start off a decode processing run. This should only be called once on - * a given Decoder object. - */ -void -Decoder::process_begin () -{ - _delay_in_frames = _film->audio_delay() * audio_sample_rate() / 1000; - _delay_line = new DelayLine (audio_channels(), _delay_in_frames); -} - -/** Finish off a decode processing run */ -void -Decoder::process_end () -{ - if (_delay_in_frames < 0 && _opt->decode_audio && audio_channels()) { - shared_ptr b (new AudioBuffers (audio_channels(), -_delay_in_frames)); - b->make_silent (); - emit_audio (b); - } - - if (_opt->decode_audio && audio_channels()) { - - /* Ensure that our video and audio emissions are the same length */ - - int64_t audio_short_by_frames = video_frames_to_audio_frames (_video_frame, audio_sample_rate(), frames_per_second()) - _audio_frame; - - _film->log()->log ( - String::compose ( - "Decoder has emitted %1 video frames (which equals %2 audio frames) and %3 audio frames", - _video_frame, - video_frames_to_audio_frames (_video_frame, audio_sample_rate(), frames_per_second()), - _audio_frame - ) - ); - - if (audio_short_by_frames < 0) { - - _film->log()->log (String::compose ("Emitted %1 too many audio frames", -audio_short_by_frames)); - - /* We have emitted more audio than video. Emit enough black video frames so that we reverse this */ - int const black_video_frames = ceil (-audio_short_by_frames * frames_per_second() / audio_sample_rate()); - - _film->log()->log (String::compose ("Emitting %1 frames of black video", black_video_frames)); - - shared_ptr black (new CompactImage (pixel_format(), native_size())); - black->make_black (); - for (int i = 0; i < black_video_frames; ++i) { - emit_video (black, shared_ptr ()); - } - - /* Now recompute our check value */ - audio_short_by_frames = video_frames_to_audio_frames (_video_frame, audio_sample_rate(), frames_per_second()) - _audio_frame; - } - - if (audio_short_by_frames > 0) { - _film->log()->log (String::compose ("Emitted %1 too few audio frames", audio_short_by_frames)); - shared_ptr b (new AudioBuffers (audio_channels(), audio_short_by_frames)); - b->make_silent (); - emit_audio (b); - } - } -} - -/** Start decoding */ -void -Decoder::go () -{ - process_begin (); - - if (_job && !_film->dcp_length()) { - _job->set_progress_unknown (); - } - - while (pass () == false) { - if (_job) { - _job->set_progress (float (_video_frame) / _film->length().get()); - } - } - - process_end (); -} - -/** Called by subclasses to tell the world that some audio data is ready - * @param data Audio data, in Film::audio_sample_format. - * @param size Number of bytes of data. - */ -void -Decoder::process_audio (uint8_t* data, int size) -{ - /* XXX: could this be removed? */ - if (size == 0) { - return; - } - - assert (_film->audio_channels()); - assert (bytes_per_audio_sample()); - - /* Deinterleave and convert to float */ - - assert ((size % (bytes_per_audio_sample() * audio_channels())) == 0); - - int const total_samples = size / bytes_per_audio_sample(); - int const frames = total_samples / _film->audio_channels(); - shared_ptr audio (new AudioBuffers (audio_channels(), frames)); - - switch (audio_sample_format()) { - case AV_SAMPLE_FMT_S16: - { - int16_t* p = (int16_t *) data; - 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()) { - channel = 0; - ++sample; - } - } - } - break; - - case AV_SAMPLE_FMT_S32: - { - int32_t* p = (int32_t *) data; - int sample = 0; - int channel = 0; - for (int i = 0; i < total_samples; ++i) { - audio->data(channel)[sample] = float(*p++) / (1 << 31); - - ++channel; - if (channel == _film->audio_channels()) { - channel = 0; - ++sample; - } - } - } - - case AV_SAMPLE_FMT_FLTP: - { - float* p = reinterpret_cast (data); - for (int i = 0; i < _film->audio_channels(); ++i) { - memcpy (audio->data(i), p, frames * sizeof(float)); - p += frames; - } - } - break; - - default: - assert (false); - } - - /* Maybe apply gain */ - if (_film->audio_gain() != 0) { - float const linear_gain = pow (10, _film->audio_gain() / 20); - for (int i = 0; i < _film->audio_channels(); ++i) { - for (int j = 0; j < frames; ++j) { - audio->data(i)[j] *= linear_gain; - } - } - } - - _delay_line->feed (audio); - emit_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 graph; - - list >::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 > images = graph->process (frame); - - for (list >::iterator i = images.begin(); i != images.end(); ++i) { - shared_ptr 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, shared_ptr sub) -{ - TIMING ("Decoder emits %1", _video_frame); - Video (image, _video_frame, sub); - ++_video_frame; - - _last_image = image; - _last_subtitle = sub; -} - -void -Decoder::emit_audio (shared_ptr audio) -{ - Audio (audio, _audio_frame); - _audio_frame += audio->frames (); -} - -void -Decoder::process_subtitle (shared_ptr 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)); - } -} - -int -Decoder::bytes_per_audio_sample () const -{ - return av_get_bytes_per_sample (audio_sample_format ()); + throw DecodeError ("decoder does not support seek"); }