* @brief Parent class for decoders of content.
*/
-#include <iostream>
-#include <stdint.h>
-#include <boost/lexical_cast.hpp>
#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"
-using std::string;
-using std::stringstream;
-using std::min;
-using std::list;
+#include "i18n.h"
+
using boost::shared_ptr;
/** @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.
- * @param ignore_length Ignore the content's claimed length when computing progress.
+ * @param o Decode options.
*/
-Decoder::Decoder (boost::shared_ptr<Film> f, boost::shared_ptr<const Options> o, Job* j, bool minimal, bool ignore_length)
+Decoder::Decoder (shared_ptr<const Film> f)
: _film (f)
- , _opt (o)
- , _job (j)
- , _minimal (minimal)
- , _ignore_length (ignore_length)
- , _video_frame_index (0)
- , _delay_line (0)
- , _delay_in_bytes (0)
- , _audio_frames_processed (0)
-{
- if (_opt->decode_video_frequency != 0 && !_film->length()) {
- throw DecodeError ("cannot do a partial decode if length is unknown");
- }
-}
-
-Decoder::~Decoder ()
-{
- delete _delay_line;
-}
-
-/** Start off a decode processing run */
-void
-Decoder::process_begin ()
-{
- _delay_in_bytes = _film->audio_delay() * audio_sample_rate() * 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 / (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 video_length_in_audio_frames = ((int64_t) video_frame_index() * audio_sample_rate() / frames_per_second());
- int64_t const audio_short_by_frames = video_length_in_audio_frames - _audio_frames_processed;
-
- _film->log()->log (
- String::compose ("DCP length is %1 (%2 audio frames); %3 frames of audio processed.",
- video_frame_index(),
- video_length_in_audio_frames,
- _audio_frames_processed)
- );
-
- if (audio_short_by_frames >= 0 && _opt->decode_audio) {
-
- _film->log()->log (String::compose ("DCP length is %1; %2 frames of audio processed.", video_frame_index(), _audio_frames_processed));
- _film->log()->log (String::compose ("Adding %1 frames of silence to the end.", audio_short_by_frames));
-
- /* XXX: this is slightly questionable; does memset () give silence with all
- sample formats?
- */
-
- int64_t bytes = audio_short_by_frames * _film->audio_channels() * bytes_per_audio_sample();
-
- int64_t const silence_size = 16 * 1024 * _film->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 && !_film->dcp_length()) {
- _job->set_progress_unknown ();
- }
-
- while (pass () == false) {
- if (_job && _film->dcp_length()) {
- _job->set_progress (float (_video_frame_index) / _film->dcp_length().get());
- }
- }
-
- 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 (!_ignore_length && _video_frame_index >= _film->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 Film::audio_sample_format.
- * @param size Number of bytes of data.
- */
-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)
-{
- 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<AudioBuffers> 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<float*> (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;
- }
- }
- }
-
- /* Update the number of audio frames we've pushed to the encoder */
- _audio_frames_processed += audio->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_index;
- return;
- }
- /* Use Film::length here as our one may be wrong */
-
- int gap = 0;
- if (_opt->decode_video_frequency != 0) {
- gap = _film->length().get() / _opt->decode_video_frequency;
- }
-
- if (_opt->decode_video_frequency != 0 && gap != 0 && (_video_frame_index % gap) != 0) {
- ++_video_frame_index;
- return;
- }
-
- 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) {
- if (_opt->black_after > 0 && _video_frame_index > _opt->black_after) {
- (*i)->make_black ();
- }
-
- shared_ptr<Subtitle> sub;
- if (_timed_subtitle && _timed_subtitle->displayed_at (double (video_frame_index()) / _film->frames_per_second())) {
- sub = _timed_subtitle->subtitle ();
- }
-
- TIMING ("Decoder emits %1", _video_frame_index);
- Video (*i, _video_frame_index, sub);
- ++_video_frame_index;
- _last_image = *i;
- _last_subtitle = sub;
- }
-}
-
-void
-Decoder::repeat_last_video ()
-{
- assert (_last_image);
- Video (_last_image, _video_frame_index, _last_subtitle);
- ++_video_frame_index;
-}
-
-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));
- }
-}
-
-
-int
-Decoder::bytes_per_audio_sample () const
-{
- return av_get_bytes_per_sample (audio_sample_format ());
}
projects / dcpomatic.git / blobdiff