Fix crash brought on by previous.
[dcpomatic.git] / src / lib / player.cc
index 7b1b08250b5edb3ec7f16ee61613a0af22bca03f..035af81feba6215ee61a52eac3fa453f3fa205f8 100644 (file)
@@ -87,7 +87,7 @@ Player::Player (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist
        , _always_burn_subtitles (false)
        , _fast (false)
        , _play_referenced (false)
-       , _audio_merger (_film->audio_channels(), _film->audio_frame_rate())
+       , _audio_merger (_film->audio_frame_rate())
 {
        _film_changed_connection = _film->Changed.connect (bind (&Player::film_changed, this, _1));
        _playlist_changed_connection = _playlist->Changed.connect (bind (&Player::playlist_changed, this));
@@ -95,6 +95,8 @@ Player::Player (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist
        set_video_container_size (_film->frame_size ());
 
        film_changed (Film::AUDIO_PROCESSOR);
+
+       seek (DCPTime (), true);
 }
 
 void
@@ -146,6 +148,28 @@ Player::setup_pieces ()
                }
        }
 
+       BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
+               if (i->content->audio) {
+                       BOOST_FOREACH (AudioStreamPtr j, i->content->audio->streams()) {
+                               _stream_states[j] = StreamState (i, i->content->position ());
+                       }
+               }
+       }
+
+       if (!_play_referenced) {
+               BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
+                       shared_ptr<DCPContent> dc = dynamic_pointer_cast<DCPContent> (i->content);
+                       if (dc) {
+                               if (dc->reference_video()) {
+                                       _no_video.push_back (DCPTimePeriod (dc->position(), dc->end()));
+                               }
+                               if (dc->reference_audio()) {
+                                       _no_audio.push_back (DCPTimePeriod (dc->position(), dc->end()));
+                               }
+                       }
+               }
+       }
+
        _have_valid_pieces = true;
 }
 
@@ -519,67 +543,39 @@ Player::pass ()
        }
 
        if (!earliest) {
-               /* No more content; fill up to the length of our playlist with silent black */
-
-               DCPTime const length = _playlist->length ();
-
-               DCPTime const frame = DCPTime::from_frames (1, _film->video_frame_rate());
-               DCPTime from;
+               /* No more content; fill up with silent black */
+               DCPTimePeriod remaining_video (DCPTime(), _playlist->length());
                if (_last_time) {
-                       from = _last_time.get() + frame;
-               }
-               for (DCPTime i = from; i < length; i += frame) {
-                       Video (black_player_video_frame (), i);
+                       remaining_video.from = _last_time.get() + one_video_frame();
                }
-
-               DCPTime t = _last_audio_time;
-               while (t < length) {
-                       DCPTime block = min (DCPTime::from_seconds (0.5), length - t);
-                       shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), block.frames_round(_film->audio_frame_rate())));
-                       silence->make_silent ();
-                       Audio (silence, t);
-                       t += block;
-               }
-
+               fill_video (remaining_video);
+               fill_audio (DCPTimePeriod (_last_audio_time, _playlist->length()));
                return true;
        }
 
        earliest->done = earliest->decoder->pass ();
+       if (earliest->done && earliest->content->audio) {
+               /* Flush the Player audio system for this piece */
+               BOOST_FOREACH (AudioStreamPtr i, earliest->content->audio->streams()) {
+                       audio_flush (earliest, i);
+               }
+       }
 
        /* Emit any audio that is ready */
 
-       optional<DCPTime> earliest_audio;
-       BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
-               if (i->decoder->audio) {
-                       DCPTime t = i->content->position()
-                               + DCPTime (i->decoder->audio->position(), i->frc)
-                               + DCPTime::from_seconds (i->content->audio->delay() / 1000.0);
-
-                       if (t < DCPTime()) {
-                               t = DCPTime();
-                       }
-
-                       if (!earliest_audio || t < *earliest_audio) {
-                               earliest_audio = t;
-                       }
+       DCPTime pull_from = _playlist->length ();
+       for (map<AudioStreamPtr, StreamState>::const_iterator i = _stream_states.begin(); i != _stream_states.end(); ++i) {
+               if (!i->second.piece->done && i->second.last_push_end < pull_from) {
+                       pull_from = i->second.last_push_end;
                }
        }
 
-       pair<shared_ptr<AudioBuffers>, DCPTime> audio = _audio_merger.pull (earliest_audio.get_value_or(DCPTime()));
-       if (audio.first->frames() > 0) {
-               DCPOMATIC_ASSERT (audio.second >= _last_audio_time);
-               DCPTime t = _last_audio_time;
-               while (t < audio.second) {
-                       /* Silence up to the time of this new audio */
-                       DCPTime block = min (DCPTime::from_seconds (0.5), audio.second - t);
-                       shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), block.frames_round(_film->audio_frame_rate())));
-                       silence->make_silent ();
-                       Audio (silence, t);
-                       t += block;
-               }
-
-               Audio (audio.first, audio.second);
-               _last_audio_time = audio.second + DCPTime::from_frames(audio.first->frames(), _film->audio_frame_rate());
+       list<pair<shared_ptr<AudioBuffers>, DCPTime> > audio = _audio_merger.pull (pull_from);
+       for (list<pair<shared_ptr<AudioBuffers>, DCPTime> >::iterator i = audio.begin(); i != audio.end(); ++i) {
+               DCPOMATIC_ASSERT (i->second >= _last_audio_time);
+               fill_audio (DCPTimePeriod (_last_audio_time, i->second));
+               Audio (i->first, i->second);
+               _last_audio_time = i->second + DCPTime::from_frames(i->first->frames(), _film->audio_frame_rate());
        }
 
        return false;
@@ -593,9 +589,14 @@ Player::video (weak_ptr<Piece> wp, ContentVideo video)
                return;
        }
 
+       FrameRateChange frc(piece->content->active_video_frame_rate(), _film->video_frame_rate());
+       if (frc.skip && (video.frame % 2) == 1) {
+               return;
+       }
+
        /* Time and period of the frame we will emit */
        DCPTime const time = content_video_to_dcp (piece, video.frame);
-       DCPTimePeriod const period (time, time + DCPTime::from_frames (1, _film->video_frame_rate()));
+       DCPTimePeriod const period (time, time + one_video_frame());
 
        /* Discard if it's outside the content's period */
        if (time < piece->content->position() || time >= piece->content->end()) {
@@ -632,15 +633,7 @@ Player::video (weak_ptr<Piece> wp, ContentVideo video)
        /* Fill gaps */
 
        if (_last_time) {
-               /* XXX: this may not work for 3D */
-               DCPTime const frame = DCPTime::from_frames (1, _film->video_frame_rate());
-               for (DCPTime i = _last_time.get() + frame; i < time; i += frame) {
-                       if (_playlist->video_content_at(i) && _last_video) {
-                               Video (shared_ptr<PlayerVideo> (new PlayerVideo (*_last_video)), i);
-                       } else {
-                               Video (black_player_video_frame (), i);
-                       }
-               }
+               fill_video (DCPTimePeriod (_last_time.get() + one_video_frame(), time));
        }
 
        _last_video.reset (
@@ -681,23 +674,84 @@ Player::video (weak_ptr<Piece> wp, ContentVideo video)
 }
 
 void
-Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
+Player::audio_flush (shared_ptr<Piece> piece, AudioStreamPtr stream)
 {
-       shared_ptr<Piece> piece = wp.lock ();
-       if (!piece) {
+       shared_ptr<AudioContent> content = piece->content->audio;
+       DCPOMATIC_ASSERT (content);
+
+       shared_ptr<Resampler> r = resampler (content, stream, false);
+       if (!r) {
                return;
        }
 
-       shared_ptr<AudioContent> content = piece->content->audio;
-       DCPOMATIC_ASSERT (content);
+       pair<shared_ptr<const AudioBuffers>, Frame> ro = r->flush ();
+       ContentAudio content_audio;
+       content_audio.audio = ro.first;
+       content_audio.frame = ro.second;
 
+       /* Compute time in the DCP */
+       DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
+
+       audio_transform (content, stream, content_audio, time);
+}
+
+/** Do our common processing on some audio */
+void
+Player::audio_transform (shared_ptr<AudioContent> content, AudioStreamPtr stream, ContentAudio content_audio, DCPTime time)
+{
        /* Gain */
+
        if (content->gain() != 0) {
                shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
                gain->apply_gain (content->gain ());
                content_audio.audio = gain;
        }
 
+       /* Remap */
+
+       shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), content_audio.audio->frames()));
+       dcp_mapped->make_silent ();
+
+       AudioMapping map = stream->mapping ();
+       for (int i = 0; i < map.input_channels(); ++i) {
+               for (int j = 0; j < dcp_mapped->channels(); ++j) {
+                       if (map.get (i, static_cast<dcp::Channel> (j)) > 0) {
+                               dcp_mapped->accumulate_channel (
+                                       content_audio.audio.get(),
+                                       i,
+                                       static_cast<dcp::Channel> (j),
+                                       map.get (i, static_cast<dcp::Channel> (j))
+                                       );
+                       }
+               }
+       }
+
+       content_audio.audio = dcp_mapped;
+
+       /* Process */
+
+       if (_audio_processor) {
+               content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
+       }
+
+       /* Push */
+
+       _audio_merger.push (content_audio.audio, time);
+       DCPOMATIC_ASSERT (_stream_states.find (stream) != _stream_states.end ());
+       _stream_states[stream].last_push_end = time + DCPTime::from_frames (content_audio.audio->frames(), _film->audio_frame_rate());
+}
+
+void
+Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_audio)
+{
+       shared_ptr<Piece> piece = wp.lock ();
+       if (!piece) {
+               return;
+       }
+
+       shared_ptr<AudioContent> content = piece->content->audio;
+       DCPOMATIC_ASSERT (content);
+
        /* Resample */
        if (stream->frame_rate() != content->resampled_frame_rate()) {
                shared_ptr<Resampler> r = resampler (content, stream, true);
@@ -726,31 +780,7 @@ Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_a
                time += discard_time;
        }
 
-       /* Remap channels */
-       shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), content_audio.audio->frames()));
-       dcp_mapped->make_silent ();
-
-       AudioMapping map = stream->mapping ();
-       for (int i = 0; i < map.input_channels(); ++i) {
-               for (int j = 0; j < dcp_mapped->channels(); ++j) {
-                       if (map.get (i, static_cast<dcp::Channel> (j)) > 0) {
-                               dcp_mapped->accumulate_channel (
-                                       content_audio.audio.get(),
-                                       i,
-                                       static_cast<dcp::Channel> (j),
-                                       map.get (i, static_cast<dcp::Channel> (j))
-                                       );
-                       }
-               }
-       }
-
-       content_audio.audio = dcp_mapped;
-
-       if (_audio_processor) {
-               content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
-       }
-
-       _audio_merger.push (content_audio.audio, time);
+       audio_transform (content, stream, content_audio, time);
 }
 
 void
@@ -831,6 +861,10 @@ Player::text_subtitle (weak_ptr<Piece> wp, ContentTextSubtitle subtitle)
 void
 Player::seek (DCPTime time, bool accurate)
 {
+       if (_audio_processor) {
+               _audio_processor->flush ();
+       }
+
        BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
                if (i->content->position() <= time && time < i->content->end()) {
                        i->decoder->seek (dcp_to_content_time (i, time), accurate);
@@ -839,7 +873,7 @@ Player::seek (DCPTime time, bool accurate)
        }
 
        if (accurate) {
-               _last_time = time - DCPTime::from_frames (1, _film->video_frame_rate ());
+               _last_time = time - one_video_frame ();
        } else {
                _last_time = optional<DCPTime> ();
        }
@@ -871,3 +905,42 @@ Player::resampler (shared_ptr<const AudioContent> content, AudioStreamPtr stream
        _resamplers[make_pair(content, stream)] = r;
        return r;
 }
+
+void
+Player::fill_video (DCPTimePeriod period)
+{
+       /* XXX: this may not work for 3D */
+       BOOST_FOREACH (DCPTimePeriod i, subtract(period, _no_video)) {
+               for (DCPTime j = i.from; j < i.to; j += one_video_frame()) {
+                       if (_playlist->video_content_at(j) && _last_video) {
+                               Video (shared_ptr<PlayerVideo> (new PlayerVideo (*_last_video)), j);
+                       } else {
+                               Video (black_player_video_frame(), j);
+                       }
+               }
+       }
+}
+
+void
+Player::fill_audio (DCPTimePeriod period)
+{
+       BOOST_FOREACH (DCPTimePeriod i, subtract(period, _no_audio)) {
+               DCPTime t = i.from;
+               while (t < i.to) {
+                       DCPTime block = min (DCPTime::from_seconds (0.5), i.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 ();
+                               Audio (silence, t);
+                       }
+                       t += block;
+               }
+       }
+}
+
+DCPTime
+Player::one_video_frame () const
+{
+       return DCPTime::from_frames (1, _film->video_frame_rate ());
+}