X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fdecoder.cc;h=0f2bc4358008e62123e8e042a8247c142e317c71;hb=b46c35e50da6e557a02156bc094e639650b1c890;hp=2f66aff68b4fb63fc5c5804472fe76eb9c41169d;hpb=60990830b23f295d218b6ae549654e5c67a7bdff;p=dcpomatic.git diff --git a/src/lib/decoder.cc b/src/lib/decoder.cc index 2f66aff68..0f2bc4358 100644 --- a/src/lib/decoder.cc +++ b/src/lib/decoder.cc @@ -1,260 +1,103 @@ /* - Copyright (C) 2012 Carl Hetherington + Copyright (C) 2012-2018 Carl Hetherington - 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 . */ -/** @file src/decoder.cc - * @brief Parent class for decoders of content. - */ - -#include -#include -#include -#include "film.h" -#include "format.h" -#include "job.h" -#include "options.h" -#include "exceptions.h" -#include "image.h" -#include "util.h" -#include "log.h" #include "decoder.h" -#include "delay_line.h" -#include "subtitle.h" -#include "filter_graph.h" +#include "video_decoder.h" +#include "audio_decoder.h" +#include "text_decoder.h" +#include +#include -using std::string; -using std::stringstream; -using std::min; -using std::pair; -using std::list; -using boost::shared_ptr; +using std::cout; using boost::optional; +using boost::shared_ptr; +using boost::weak_ptr; +using namespace dcpomatic; -/** @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) - : _film (f) - , _opt (o) - , _job (j) - , _video_frame (0) - , _audio_frame (0) - , _delay_line (0) - , _delay_in_frames (0) -{ - -} - -Decoder::~Decoder () -{ - delete _delay_line; -} - -/** Start off a decode processing run. This should only be called once on - * a given Decoder object. - */ -void -Decoder::process_begin () -{ - if (_audio_stream) { - _delay_in_frames = _film->audio_delay() * _audio_stream.get().sample_rate() / 1000; - _delay_line = new DelayLine (_audio_stream.get().channels(), _delay_in_frames); - } -} - -/** Finish off a decode processing run */ -void -Decoder::process_end () +Decoder::Decoder (weak_ptr film) + : _film (film) { - if (_delay_in_frames < 0 && _opt->decode_audio && _audio_stream) { - shared_ptr b (new AudioBuffers (_audio_stream.get().channels(), -_delay_in_frames)); - b->make_silent (); - emit_audio (b); - } - - if (_opt->decode_audio && _audio_stream) { - - /* 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_stream.get().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_stream.get().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_stream.get().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_stream.get().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_stream.get().channels(), audio_short_by_frames)); - b->make_silent (); - emit_audio (b); - } - } } -/** Start decoding */ -void -Decoder::go () +/** @return Earliest time of content that the next pass() will emit */ +ContentTime +Decoder::position () const { - process_begin (); + optional pos; + shared_ptr f = film(); - if (_job && !_film->dcp_length()) { - _job->set_progress_unknown (); + if (video && !video->ignore() && (!pos || video->position(f).get_value_or(ContentTime()) < *pos)) { + pos = video->position(f); } - while (pass () == false) { - if (_job && _film->dcp_length()) { - _job->set_progress (float (_video_frame) / _film->length().get()); - } + if (audio && !audio->ignore() && (!pos || audio->position(f).get_value_or(ContentTime()) < *pos)) { + pos = audio->position(f); } - 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 (shared_ptr 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; + /* Only decide position based on subtitle sources if there is nothing else + to go on. Otherwise we can have problems with muxed sources which have + (for example) video, audio and a subtitle. If the subtitle data runs out + before the video/audio the position() call will return the position of the + end of the subs. This causes this file to be pass()ed in favour of others, + which can cause bugs like #1581. + */ + if (!pos) { + BOOST_FOREACH (shared_ptr i, text) { + if (!i->ignore() && (!pos || i->position(f) < *pos)) { + pos = i->position(f); } } } - _delay_line->feed (audio); - emit_audio (audio); + return pos.get_value_or(ContentTime()); } -/** 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) +Decoder::seek (ContentTime, bool) { - 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; + if (video) { + video->seek (); } - - 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); + if (audio) { + audio->seek (); } -} - -void -Decoder::repeat_last_video () -{ - if (!_last_image) { - _last_image.reset (new CompactImage (pixel_format(), native_size())); - _last_image->make_black (); + BOOST_FOREACH (shared_ptr i, text) { + i->seek (); } - - 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) +shared_ptr +Decoder::only_text () const { - _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)); + DCPOMATIC_ASSERT (text.size() < 2); + if (text.empty ()) { + return shared_ptr (); } + return text.front (); } -void -Decoder::set_audio_stream (optional s) -{ - _audio_stream = s; -} - -void -Decoder::set_subtitle_stream (optional s) +shared_ptr +Decoder::film () const { - _subtitle_stream = s; + shared_ptr f = _film.lock (); + DCPOMATIC_ASSERT (f); + return f; }