using std::string;
using std::stringstream;
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<Film> f, boost::shared_ptr<const Options> o, Job* j)
: _film (f)
, _opt (o)
, _job (j)
- , _video_frame_index (0)
+ , _video_frame (0)
+ , _audio_frame (0)
, _delay_line (0)
- , _delay_in_bytes (0)
- , _audio_frames_processed (0)
+ , _delay_in_frames (0)
{
}
delete _delay_line;
}
-/** Start off a decode processing run */
+/** Start off a decode processing run. This should only be called once on
+ * a given Decoder object.
+ */
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;
+ 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 ()
{
- 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 (_delay_in_frames < 0 && _opt->decode_audio && _audio_stream) {
+ shared_ptr<AudioBuffers> b (new AudioBuffers (_audio_stream.get().channels(), -_delay_in_frames));
+ b->make_silent ();
+ emit_audio (b);
}
- /* If we cut the decode off, the audio may be short; push some silence
- in to get it to the right length.
- */
+ 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
+ )
+ );
- 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;
+ if (audio_short_by_frames < 0) {
- _film->log()->log (
- String::compose ("Source length is %1 (%2 audio frames); %3 frames of audio processed.",
- video_frame_index(),
- video_length_in_audio_frames,
- _audio_frames_processed)
- );
+ _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<Image> black (new CompactImage (pixel_format(), native_size()));
+ black->make_black ();
+ for (int i = 0; i < black_video_frames; ++i) {
+ emit_video (black, shared_ptr<Subtitle> ());
+ }
+
+ /* 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 && _opt->decode_audio) {
-
- _film->log()->log (String::compose ("Source 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;
+ if (audio_short_by_frames > 0) {
+ _film->log()->log (String::compose ("Emitted %1 too few audio frames", audio_short_by_frames));
+ shared_ptr<AudioBuffers> b (new AudioBuffers (_audio_stream.get().channels(), audio_short_by_frames));
+ b->make_silent ();
+ emit_audio (b);
}
}
}
while (pass () == false) {
if (_job && _film->dcp_length()) {
- SourceFrame const p = _video_frame_index - _film->dcp_trim_start();
- _job->set_progress (float (p) / _film->dcp_length().get());
+ _job->set_progress (float (_video_frame) / _film->length().get());
}
}
* @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)
+Decoder::process_audio (shared_ptr<AudioBuffers> audio)
{
- 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) {
+ for (int i = 0; i < audio->channels(); ++i) {
+ for (int j = 0; j < audio->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);
+ _delay_line->feed (audio);
+ emit_audio (audio);
}
/** Called by subclasses to tell the world that some video data is ready.
void
Decoder::process_video (AVFrame* frame)
{
- assert (_film->length());
-
- /* Use Film::length here as our one may be wrong */
-
- if (_opt->decode_video_skip != 0 && (_video_frame_index % _opt->decode_video_skip) != 0) {
- ++_video_frame_index;
- return;
- }
-
- if (_film->dcp_trim_start() > _video_frame_index || (_film->length().get() - _film->dcp_trim_end()) < _video_frame_index) {
- ++_video_frame_index;
- return;
- }
-
shared_ptr<FilterGraph> graph;
list<shared_ptr<FilterGraph> >::iterator i = _filter_graphs.begin();
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_index()) / _film->frames_per_second())) {
+ if (_timed_subtitle && _timed_subtitle->displayed_at (double (video_frame()) / _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;
+
+ emit_video (*i, sub);
}
}
_last_image.reset (new CompactImage (pixel_format(), native_size()));
_last_image->make_black ();
}
-
- Video (_last_image, _video_frame_index, _last_subtitle);
- ++_video_frame_index;
+
+ 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, _video_frame, sub);
+ ++_video_frame;
+
+ _last_image = image;
+ _last_subtitle = sub;
+}
+
+void
+Decoder::emit_audio (shared_ptr<AudioBuffers> audio)
+{
+ Audio (audio, _audio_frame);
+ _audio_frame += audio->frames ();
}
void
}
}
+void
+Decoder::set_audio_stream (optional<AudioStream> s)
+{
+ _audio_stream = s;
+}
-int
-Decoder::bytes_per_audio_sample () const
+void
+Decoder::set_subtitle_stream (optional<SubtitleStream> s)
{
- return av_get_bytes_per_sample (audio_sample_format ());
+ _subtitle_stream = s;
}
projects / dcpomatic.git / blobdiff