+ _last_video_time = optional<DCPTime>();
+ _last_video_eyes = optional<Eyes>();
+ _last_audio_time = optional<DCPTime>();
+ }
+
+ _black.set_position (time);
+ _silent.set_position (time);
+
+ _last_video.clear ();
+}
+
+void
+Player::emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
+{
+ /* We need a delay to give a little wiggle room to ensure that relevent subtitles arrive at the
+ player before the video that requires them.
+ */
+ _delay.push_back (make_pair (pv, time));
+
+ if (pv->eyes() == EYES_BOTH || pv->eyes() == EYES_RIGHT) {
+ _last_video_time = time + one_video_frame();
+ }
+ _last_video_eyes = increment_eyes (pv->eyes());
+
+ if (_delay.size() < 3) {
+ return;
+ }
+
+ pair<shared_ptr<PlayerVideo>, DCPTime> to_do = _delay.front();
+ _delay.pop_front();
+ do_emit_video (to_do.first, to_do.second);
+}
+
+void
+Player::do_emit_video (shared_ptr<PlayerVideo> pv, DCPTime time)
+{
+ if (pv->eyes() == EYES_BOTH || pv->eyes() == EYES_RIGHT) {
+ for (int i = 0; i < TEXT_COUNT; ++i) {
+ _active_texts[i].clear_before (time);
+ }
+ }
+
+ optional<PositionImage> subtitles = open_subtitles_for_frame (time);
+ if (subtitles) {
+ pv->set_text (subtitles.get ());
+ }
+
+ Video (pv, time);
+}
+
+void
+Player::emit_audio (shared_ptr<AudioBuffers> data, DCPTime time)
+{
+ /* Log if the assert below is about to fail */
+ if (_last_audio_time && labs(time.get() - _last_audio_time->get()) > 1) {
+ _film->log()->log(String::compose("Out-of-sequence emit %1 vs %2", to_string(time), to_string(*_last_audio_time)), LogEntry::TYPE_WARNING);
+ }
+
+ /* This audio must follow on from the previous, allowing for half a sample (at 48kHz) leeway */
+ DCPOMATIC_ASSERT (!_last_audio_time || labs(time.get() - _last_audio_time->get()) < 2);
+ Audio (data, time, _film->audio_frame_rate());
+ _last_audio_time = time + DCPTime::from_frames (data->frames(), _film->audio_frame_rate());
+}
+
+void
+Player::fill_audio (DCPTimePeriod period)
+{
+ if (period.from == period.to) {
+ return;
+ }
+
+ DCPOMATIC_ASSERT (period.from < period.to);
+
+ DCPTime t = period.from;
+ while (t < period.to) {
+ DCPTime block = min (DCPTime::from_seconds (0.5), period.to - t);
+ Frame const samples = block.frames_round(_film->audio_frame_rate());
+ if (samples) {
+ shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), samples));
+ silence->make_silent ();
+ emit_audio (silence, t);
+ }
+ t += block;
+ }
+}
+
+DCPTime
+Player::one_video_frame () const
+{
+ return DCPTime::from_frames (1, _film->video_frame_rate ());
+}
+
+pair<shared_ptr<AudioBuffers>, DCPTime>
+Player::discard_audio (shared_ptr<const AudioBuffers> audio, DCPTime time, DCPTime discard_to) const
+{
+ DCPTime const discard_time = discard_to - time;
+ Frame const discard_frames = discard_time.frames_round(_film->audio_frame_rate());
+ Frame remaining_frames = audio->frames() - discard_frames;
+ if (remaining_frames <= 0) {
+ return make_pair(shared_ptr<AudioBuffers>(), DCPTime());