X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fdecoder.cc;h=3f4cda6eb5a4345595410fe475314f3d24881bd7;hb=5ab303bbd36982dad1a35243256f1e7099775982;hp=c398c53a01e01e128c35d3322ec07e757629b0b1;hpb=6b368187e7bc16cbe0e83858f35990e536c5ccc8;p=dcpomatic.git diff --git a/src/lib/decoder.cc b/src/lib/decoder.cc index c398c53a0..3f4cda6eb 100644 --- a/src/lib/decoder.cc +++ b/src/lib/decoder.cc @@ -21,447 +21,18 @@ * @brief Parent class for decoders of content. */ -#include -#include -#include -extern "C" { -#include -#include -#if (LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR >= 53 && LIBAVFILTER_VERSION_MINOR <= 77) || LIBAVFILTER_VERSION_MAJOR == 3 -#include -#include -#elif LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR == 15 -#include -#endif -#include -} #include "film.h" -#include "format.h" -#include "job.h" -#include "film_state.h" -#include "options.h" -#include "exceptions.h" -#include "image.h" -#include "util.h" -#include "log.h" #include "decoder.h" -#include "filter.h" -#include "delay_line.h" -#include "ffmpeg_compatibility.h" -#include "subtitle.h" - -using namespace std; -using namespace boost; - -/** @param s FilmState of the Film. - * @param o Options. - * @param j Job that we are running within, or 0 - * @param l Log to use. - * @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. - * @param ignore_length Ignore the content's claimed length when computing progress. - */ -Decoder::Decoder (boost::shared_ptr s, boost::shared_ptr o, Job* j, Log* l, bool minimal, bool ignore_length) - : _fs (s) - , _opt (o) - , _job (j) - , _log (l) - , _minimal (minimal) - , _ignore_length (ignore_length) - , _video_frame (0) - , _buffer_src_context (0) - , _buffer_sink_context (0) - , _have_setup_video_filters (false) - , _delay_line (0) - , _delay_in_bytes (0) - , _audio_frames_processed (0) -{ - if (_opt->decode_video_frequency != 0 && _fs->length() == 0) { - throw DecodeError ("cannot do a partial decode if length == 0"); - } -} - -Decoder::~Decoder () -{ - delete _delay_line; -} - -/** Start off a decode processing run */ -void -Decoder::process_begin () -{ - _delay_in_bytes = _fs->audio_delay() * _fs->audio_sample_rate() * _fs->audio_channels() * bytes_per_audio_sample() / 1000; - delete _delay_line; - _delay_line = new DelayLine (_delay_in_bytes); - - _audio_frames_processed = 0; -} - -/** Finish off a decode processing run */ -void -Decoder::process_end () -{ - if (_delay_in_bytes < 0) { - uint8_t remainder[-_delay_in_bytes]; - _delay_line->get_remaining (remainder); - _audio_frames_processed += _delay_in_bytes / (_fs->audio_channels() * bytes_per_audio_sample()); - emit_audio (remainder, _delay_in_bytes); - } - - /* If we cut the decode off, the audio may be short; push some silence - in to get it to the right length. - */ - - int64_t const audio_short_by_frames = - ((int64_t) _fs->dcp_length() * _fs->target_sample_rate() / _fs->frames_per_second()) - - _audio_frames_processed; - - if (audio_short_by_frames >= 0 && _opt->decode_audio) { - - _log->log (String::compose ("DCP length is %1; %2 frames of audio processed.", _fs->dcp_length(), _audio_frames_processed)); - _log->log (String::compose ("Adding %1 frames of silence to the end.", audio_short_by_frames)); - - int64_t bytes = audio_short_by_frames * _fs->audio_channels() * bytes_per_audio_sample(); - - int64_t const silence_size = 16 * 1024 * _fs->audio_channels() * bytes_per_audio_sample(); - uint8_t silence[silence_size]; - memset (silence, 0, silence_size); - - while (bytes) { - int64_t const t = min (bytes, silence_size); - emit_audio (silence, t); - bytes -= t; - } - } -} - -/** Start decoding */ -void -Decoder::go () -{ - process_begin (); - if (_job && _ignore_length) { - _job->set_progress_unknown (); - } +#include "i18n.h" - while (pass () == false) { - if (_job && !_ignore_length) { - _job->set_progress (float (_video_frame) / _fs->dcp_length()); - } - } +using boost::shared_ptr; - process_end (); -} - -/** Run one pass. This may or may not generate any actual video / audio data; - * some decoders may require several passes to generate a single frame. - * @return true if we have finished processing all data; otherwise false. - */ -bool -Decoder::pass () -{ - if (!_have_setup_video_filters) { - setup_video_filters (); - _have_setup_video_filters = true; - } - - if (!_ignore_length && _video_frame >= _fs->dcp_length()) { - return true; - } - - return do_pass (); -} - -/** Called by subclasses to tell the world that some audio data is ready - * @param data Audio data, in FilmState::audio_sample_format. - * @param size Number of bytes of data. +/** @param f Film. + * @param o Decode options. */ -void -Decoder::process_audio (uint8_t* data, int size) -{ - /* Push into the delay line */ - size = _delay_line->feed (data, size); - - emit_audio (data, size); -} - -void -Decoder::emit_audio (uint8_t* data, int size) +Decoder::Decoder (shared_ptr f) + : _film (f) { - /* Deinterleave and convert to float */ - - assert ((size % (bytes_per_audio_sample() * _fs->audio_channels())) == 0); - - int const total_samples = size / bytes_per_audio_sample(); - int const frames = total_samples / _fs->audio_channels(); - shared_ptr audio (new AudioBuffers (_fs->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 == _fs->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 == _fs->audio_channels()) { - channel = 0; - ++sample; - } - } - } - - case AV_SAMPLE_FMT_FLTP: - { - float* p = reinterpret_cast (data); - for (int i = 0; i < _fs->audio_channels(); ++i) { - memcpy (audio->data(i), p, frames * sizeof(float)); - p += frames; - } - } - break; - - default: - assert (false); - } - - /* Maybe apply gain */ - if (_fs->audio_gain() != 0) { - float const linear_gain = pow (10, _fs->audio_gain() / 20); - for (int i = 0; i < _fs->audio_channels(); ++i) { - for (int j = 0; j < frames; ++j) { - audio->data(i)[j] *= linear_gain; - } - } - } - - /* Update the number of audio frames we've pushed to the encoder */ - _audio_frames_processed += frames; - - 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) -{ - if (_minimal) { - ++_video_frame; - return; - } - - /* Use FilmState::length here as our one may be wrong */ - - int gap = 0; - if (_opt->decode_video_frequency != 0) { - gap = _fs->length() / _opt->decode_video_frequency; - } - - if (_opt->decode_video_frequency != 0 && gap != 0 && (_video_frame % gap) != 0) { - ++_video_frame; - return; - } - -#if LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR >= 53 && LIBAVFILTER_VERSION_MINOR <= 61 - - if (av_vsrc_buffer_add_frame (_buffer_src_context, frame, 0) < 0) { - throw DecodeError ("could not push buffer into filter chain."); - } - -#elif LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR == 15 - - AVRational par; - par.num = sample_aspect_ratio_numerator (); - par.den = sample_aspect_ratio_denominator (); - - if (av_vsrc_buffer_add_frame (_buffer_src_context, frame, 0, par) < 0) { - throw DecodeError ("could not push buffer into filter chain."); - } - -#else - - if (av_buffersrc_write_frame (_buffer_src_context, frame) < 0) { - throw DecodeError ("could not push buffer into filter chain."); - } - -#endif - -#if LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR >= 15 && LIBAVFILTER_VERSION_MINOR <= 61 - while (avfilter_poll_frame (_buffer_sink_context->inputs[0])) { -#else - while (av_buffersink_read (_buffer_sink_context, 0)) { -#endif - -#if LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR >= 15 - - int r = avfilter_request_frame (_buffer_sink_context->inputs[0]); - if (r < 0) { - throw DecodeError ("could not request filtered frame"); - } - - AVFilterBufferRef* filter_buffer = _buffer_sink_context->inputs[0]->cur_buf; - -#else - - AVFilterBufferRef* filter_buffer; - if (av_buffersink_get_buffer_ref (_buffer_sink_context, &filter_buffer, 0) < 0) { - filter_buffer = 0; - } - -#endif - - if (filter_buffer) { - /* This takes ownership of filter_buffer */ - shared_ptr image (new FilterBufferImage ((PixelFormat) frame->format, filter_buffer)); - - if (_opt->black_after > 0 && _video_frame > _opt->black_after) { - image->make_black (); - } - - shared_ptr sub; - if (_timed_subtitle && _timed_subtitle->displayed_at (double (last_video_frame()) / rint (_fs->frames_per_second()))) { - sub = _timed_subtitle->subtitle (); - } - - TIMING ("Decoder emits %1", _video_frame); - Video (image, _video_frame, sub); - ++_video_frame; - } - } -} - - -/** Set up a video filtering chain to include cropping and any filters that are specified - * by the Film. - */ -void -Decoder::setup_video_filters () -{ - stringstream fs; - Size size_after_crop; - - if (_opt->apply_crop) { - size_after_crop = _fs->cropped_size (native_size ()); - fs << crop_string (Position (_fs->crop().left, _fs->crop().top), size_after_crop); - } else { - size_after_crop = native_size (); - fs << crop_string (Position (0, 0), size_after_crop); - } - - string filters = Filter::ffmpeg_strings (_fs->filters()).first; - if (!filters.empty ()) { - filters += ","; - } - - filters += fs.str (); - - avfilter_register_all (); - - AVFilterGraph* graph = avfilter_graph_alloc(); - if (graph == 0) { - throw DecodeError ("Could not create filter graph."); - } - - AVFilter* buffer_src = avfilter_get_by_name("buffer"); - if (buffer_src == 0) { - throw DecodeError ("Could not find buffer src filter"); - } - - AVFilter* buffer_sink = get_sink (); - - stringstream a; - a << native_size().width << ":" - << native_size().height << ":" - << pixel_format() << ":" - << time_base_numerator() << ":" - << time_base_denominator() << ":" - << sample_aspect_ratio_numerator() << ":" - << sample_aspect_ratio_denominator(); - - int r; - - if ((r = avfilter_graph_create_filter (&_buffer_src_context, buffer_src, "in", a.str().c_str(), 0, graph)) < 0) { - throw DecodeError ("could not create buffer source"); - } - - AVBufferSinkParams* sink_params = av_buffersink_params_alloc (); - PixelFormat* pixel_fmts = new PixelFormat[2]; - pixel_fmts[0] = pixel_format (); - pixel_fmts[1] = PIX_FMT_NONE; - sink_params->pixel_fmts = pixel_fmts; - - if (avfilter_graph_create_filter (&_buffer_sink_context, buffer_sink, "out", 0, sink_params, graph) < 0) { - throw DecodeError ("could not create buffer sink."); - } - - AVFilterInOut* outputs = avfilter_inout_alloc (); - outputs->name = av_strdup("in"); - outputs->filter_ctx = _buffer_src_context; - outputs->pad_idx = 0; - outputs->next = 0; - - AVFilterInOut* inputs = avfilter_inout_alloc (); - inputs->name = av_strdup("out"); - inputs->filter_ctx = _buffer_sink_context; - inputs->pad_idx = 0; - inputs->next = 0; - - _log->log ("Using filter chain `" + filters + "'"); - -#if LIBAVFILTER_VERSION_MAJOR == 2 && LIBAVFILTER_VERSION_MINOR == 15 - if (avfilter_graph_parse (graph, filters.c_str(), inputs, outputs, 0) < 0) { - throw DecodeError ("could not set up filter graph."); - } -#else - if (avfilter_graph_parse (graph, filters.c_str(), &inputs, &outputs, 0) < 0) { - throw DecodeError ("could not set up filter graph."); - } -#endif - - if (avfilter_graph_config (graph, 0) < 0) { - throw DecodeError ("could not configure filter graph."); - } - - /* XXX: leaking `inputs' / `outputs' ? */ -} - -void -Decoder::process_subtitle (shared_ptr s) -{ - _timed_subtitle = s; - - if (_opt->apply_crop) { - Position const p = _timed_subtitle->subtitle()->position (); - _timed_subtitle->subtitle()->set_position (Position (p.x - _fs->crop().left, p.y - _fs->crop().top)); - } -} - - -int -Decoder::bytes_per_audio_sample () const -{ - return av_get_bytes_per_sample (audio_sample_format ()); }