Fix skip-frame.
[dcpomatic.git] / src / lib / player.cc
index 94c2ea37a4f45fbde6e016f0894f2b4bd70552b2..7d53b07bfe104ce90c113958023087c1cb72d27a 100644 (file)
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2013-2016 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2013-2017 Carl Hetherington <cth@carlh.net>
 
     This file is part of DCP-o-matic.
 
@@ -47,6 +47,8 @@
 #include "content_subtitle.h"
 #include "dcp_decoder.h"
 #include "image_decoder.h"
+#include "resampler.h"
+#include "compose.hpp"
 #include <dcp/reel.h>
 #include <dcp/reel_sound_asset.h>
 #include <dcp/reel_subtitle_asset.h>
@@ -76,24 +78,6 @@ using boost::dynamic_pointer_cast;
 using boost::optional;
 using boost::scoped_ptr;
 
-static bool
-has_video (Content* c)
-{
-       return static_cast<bool>(c->video);
-}
-
-static bool
-has_audio (Content* c)
-{
-       return static_cast<bool>(c->audio);
-}
-
-static bool
-has_subtitle (Content* c)
-{
-       return static_cast<bool>(c->subtitle);
-}
-
 Player::Player (shared_ptr<const Film> film, shared_ptr<const Playlist> playlist)
        : _film (film)
        , _playlist (playlist)
@@ -111,6 +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
@@ -140,10 +126,6 @@ Player::setup_pieces ()
                        decoder->audio->set_ignore ();
                }
 
-               if (decoder->audio && _fast) {
-                       decoder->audio->set_fast ();
-               }
-
                shared_ptr<DCPDecoder> dcp = dynamic_pointer_cast<DCPDecoder> (decoder);
                if (dcp && _play_referenced) {
                        dcp->set_decode_referenced ();
@@ -166,6 +148,14 @@ 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 ());
+                       }
+               }
+       }
+
        _have_valid_pieces = true;
 }
 
@@ -304,12 +294,11 @@ Player::transform_image_subtitles (list<ImageSubtitle> subs) const
 }
 
 shared_ptr<PlayerVideo>
-Player::black_player_video_frame (DCPTime time) const
+Player::black_player_video_frame () const
 {
        return shared_ptr<PlayerVideo> (
                new PlayerVideo (
                        shared_ptr<const ImageProxy> (new RawImageProxy (_black_image)),
-                       time,
                        Crop (),
                        optional<double> (),
                        _video_container_size,
@@ -527,25 +516,60 @@ Player::pass ()
        }
 
        shared_ptr<Piece> earliest;
-       DCPTime earliest_position;
+       DCPTime earliest_content;
+
        BOOST_FOREACH (shared_ptr<Piece> i, _pieces) {
-               DCPTime const t = i->content->position() + DCPTime (i->decoder->position(), i->frc);
-               if (!earliest || t < earliest_position) {
-                       earliest_position = t;
-                       earliest = i;
+               if (!i->done) {
+                       DCPTime const t = i->content->position() + DCPTime (i->decoder->position(), i->frc);
+                       if (!earliest || t < earliest_content) {
+                               earliest_content = t;
+                               earliest = i;
+                       }
                }
        }
 
        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;
+               if (_last_time) {
+                       from = _last_time.get() + frame;
+               }
+               for (DCPTime i = from; i < length; i += frame) {
+                       Video (black_player_video_frame (), i);
+               }
+
+               DCPTime t = _last_audio_time;
+               while (t < length) {
+                       DCPTime block = min (DCPTime::from_seconds (0.5), length - 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;
+               }
+
                return true;
        }
 
-       cout << "Pass " << earliest->content->path(0) << "\n";
-       earliest->decoder->pass ();
+       earliest->done = earliest->decoder->pass ();
 
        /* Emit any audio that is ready */
 
-       pair<shared_ptr<AudioBuffers>, DCPTime> audio = _audio_merger.pull (earliest_position);
+       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;
+               }
+       }
+
+//     cout << "PULL " << to_string(pull_from) << "\n";
+       pair<shared_ptr<AudioBuffers>, DCPTime> audio = _audio_merger.pull (pull_from);
        if (audio.first->frames() > 0) {
                DCPOMATIC_ASSERT (audio.second >= _last_audio_time);
                DCPTime t = _last_audio_time;
@@ -559,7 +583,7 @@ Player::pass ()
                }
 
                Audio (audio.first, audio.second);
-               _last_audio_time = audio.second;
+               _last_audio_time = audio.second + DCPTime::from_frames(audio.first->frames(), _film->audio_frame_rate());
        }
 
        return false;
@@ -573,29 +597,39 @@ 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.index());
+       DCPTime const time = content_video_to_dcp (piece, video.frame);
        DCPTimePeriod const period (time, time + DCPTime::from_frames (1, _film->video_frame_rate()));
 
+       /* Discard if it's outside the content's period */
+       if (time < piece->content->position() || time >= piece->content->end()) {
+               return;
+       }
+
        /* Get any subtitles */
 
        optional<PositionImage> subtitles;
 
-       BOOST_FOREACH (PlayerSubtitles i, _subtitles) {
+       for (list<pair<PlayerSubtitles, DCPTimePeriod> >::const_iterator i = _subtitles.begin(); i != _subtitles.end(); ++i) {
 
-               if (!i.period.overlap (period)) {
+               if (!i->second.overlap (period)) {
                        continue;
                }
 
                list<PositionImage> sub_images;
 
                /* Image subtitles */
-               list<PositionImage> c = transform_image_subtitles (i.image);
+               list<PositionImage> c = transform_image_subtitles (i->first.image);
                copy (c.begin(), c.end(), back_inserter (sub_images));
 
                /* Text subtitles (rendered to an image) */
-               if (!i.text.empty ()) {
-                       list<PositionImage> s = render_subtitles (i.text, i.fonts, _video_container_size, time);
+               if (!i->first.text.empty ()) {
+                       list<PositionImage> s = render_subtitles (i->first.text, i->first.fonts, _video_container_size, time);
                        copy (s.begin (), s.end (), back_inserter (sub_images));
                }
 
@@ -606,12 +640,14 @@ Player::video (weak_ptr<Piece> wp, ContentVideo video)
 
        /* Fill gaps */
 
-       if (_last_video_time) {
-               for (DCPTime i = _last_video_time.get(); i < time; i += DCPTime::from_frames (1, _film->video_frame_rate())) {
+       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 (_last_video->clone (i));
+                               Video (shared_ptr<PlayerVideo> (new PlayerVideo (*_last_video)), i);
                        } else {
-                               Video (black_player_video_frame (i));
+                               Video (black_player_video_frame (), i);
                        }
                }
        }
@@ -619,14 +655,13 @@ Player::video (weak_ptr<Piece> wp, ContentVideo video)
        _last_video.reset (
                new PlayerVideo (
                        video.image,
-                       time,
                        piece->content->video->crop (),
-                       piece->content->video->fade (video.frame.index()),
+                       piece->content->video->fade (video.frame),
                        piece->content->video->scale().size (
                                piece->content->video, _video_container_size, _film->frame_size ()
                                ),
                        _video_container_size,
-                       video.frame.eyes(),
+                       video.eyes,
                        video.part,
                        piece->content->video->colour_conversion ()
                        )
@@ -636,18 +671,17 @@ Player::video (weak_ptr<Piece> wp, ContentVideo video)
                _last_video->set_subtitle (subtitles.get ());
        }
 
-       _last_video_time = time;
+       _last_time = time;
 
-       cout << "Video @ " << to_string(_last_video_time.get()) << "\n";
-       Video (_last_video);
+       Video (_last_video, *_last_time);
 
        /* Discard any subtitles we no longer need */
 
-       for (list<PlayerSubtitles>::iterator i = _subtitles.begin (); i != _subtitles.end(); ) {
-               list<PlayerSubtitles>::iterator tmp = i;
+       for (list<pair<PlayerSubtitles, DCPTimePeriod> >::iterator i = _subtitles.begin (); i != _subtitles.end(); ) {
+               list<pair<PlayerSubtitles, DCPTimePeriod> >::iterator tmp = i;
                ++tmp;
 
-               if (i->period.to < time) {
+               if (i->second.to < time) {
                        _subtitles.erase (i);
                }
 
@@ -666,22 +700,43 @@ Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_a
        shared_ptr<AudioContent> content = piece->content->audio;
        DCPOMATIC_ASSERT (content);
 
-       shared_ptr<AudioBuffers> audio = content_audio.audio;
-
        /* Gain */
        if (content->gain() != 0) {
-               shared_ptr<AudioBuffers> gain (new AudioBuffers (audio));
+               shared_ptr<AudioBuffers> gain (new AudioBuffers (content_audio.audio));
                gain->apply_gain (content->gain ());
-               audio = gain;
+               content_audio.audio = gain;
+       }
+
+       /* Resample */
+       if (stream->frame_rate() != content->resampled_frame_rate()) {
+               shared_ptr<Resampler> r = resampler (content, stream, true);
+               pair<shared_ptr<const AudioBuffers>, Frame> ro = r->run (content_audio.audio, content_audio.frame);
+               content_audio.audio = ro.first;
+               content_audio.frame = ro.second;
        }
 
        /* XXX: end-trimming used to be checked here */
 
        /* Compute time in the DCP */
-       DCPTime const time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000);
+       DCPTime time = resampled_audio_to_dcp (piece, content_audio.frame) + DCPTime::from_seconds (content->delay() / 1000.0);
+
+       /* Remove anything that comes before the start of the content */
+       if (time < piece->content->position()) {
+               DCPTime const discard_time = piece->content->position() - time;
+               Frame discard_frames = discard_time.frames_round(_film->audio_frame_rate());
+               Frame remaining_frames = content_audio.audio->frames() - discard_frames;
+               if (remaining_frames <= 0) {
+                       /* This audio is entirely discarded */
+                       return;
+               }
+               shared_ptr<AudioBuffers> cut (new AudioBuffers (content_audio.audio->channels(), remaining_frames));
+               cut->copy_from (content_audio.audio.get(), remaining_frames, discard_frames, 0);
+               content_audio.audio = cut;
+               time += discard_time;
+       }
 
        /* Remap channels */
-       shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), audio->frames()));
+       shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), content_audio.audio->frames()));
        dcp_mapped->make_silent ();
 
        AudioMapping map = stream->mapping ();
@@ -689,7 +744,7 @@ Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_a
                for (int j = 0; j < dcp_mapped->channels(); ++j) {
                        if (map.get (i, static_cast<dcp::Channel> (j)) > 0) {
                                dcp_mapped->accumulate_channel (
-                                       audio.get(),
+                                       content_audio.audio.get(),
                                        i,
                                        static_cast<dcp::Channel> (j),
                                        map.get (i, static_cast<dcp::Channel> (j))
@@ -698,13 +753,17 @@ Player::audio (weak_ptr<Piece> wp, AudioStreamPtr stream, ContentAudio content_a
                }
        }
 
-       audio = dcp_mapped;
+       content_audio.audio = dcp_mapped;
 
        if (_audio_processor) {
-               audio = _audio_processor->run (audio, _film->audio_channels ());
+               content_audio.audio = _audio_processor->run (content_audio.audio, _film->audio_channels ());
        }
 
-       _audio_merger.push (audio, time);
+//     cout << "PUSH " << content_audio.audio->frames() << " @ " << to_string(time) << "\n";
+       _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
@@ -729,12 +788,12 @@ Player::image_subtitle (weak_ptr<Piece> wp, ContentImageSubtitle subtitle)
 
        PlayerSubtitles ps;
        ps.image.push_back (subtitle.sub);
-       ps.period = DCPTimePeriod (content_time_to_dcp (piece, subtitle.period().from), content_time_to_dcp (piece, subtitle.period().to));
+       DCPTimePeriod period (content_time_to_dcp (piece, subtitle.period().from), content_time_to_dcp (piece, subtitle.period().to));
 
        if (piece->content->subtitle->use() && (piece->content->subtitle->burn() || _always_burn_subtitles)) {
-               _subtitles.push_back (ps);
+               _subtitles.push_back (make_pair (ps, period));
        } else {
-               Subtitle (ps);
+               Subtitle (ps, period);
        }
 }
 
@@ -747,6 +806,7 @@ Player::text_subtitle (weak_ptr<Piece> wp, ContentTextSubtitle subtitle)
        }
 
        PlayerSubtitles ps;
+       DCPTimePeriod const period (content_time_to_dcp (piece, subtitle.period().from), content_time_to_dcp (piece, subtitle.period().to));
 
        BOOST_FOREACH (dcp::SubtitleString s, subtitle.subs) {
                s.set_h_position (s.h_position() + piece->content->subtitle->x_offset ());
@@ -768,18 +828,16 @@ Player::text_subtitle (weak_ptr<Piece> wp, ContentTextSubtitle subtitle)
                        s.set_aspect_adjust (xs / ys);
                }
 
-               ps.period = DCPTimePeriod (content_time_to_dcp (piece, subtitle.period().from), content_time_to_dcp (piece, subtitle.period().to));
-
-               s.set_in (dcp::Time(ps.period.from.seconds(), 1000));
-               s.set_out (dcp::Time(ps.period.to.seconds(), 1000));
+               s.set_in (dcp::Time(period.from.seconds(), 1000));
+               s.set_out (dcp::Time(period.to.seconds(), 1000));
                ps.text.push_back (SubtitleString (s, piece->content->subtitle->outline_width()));
                ps.add_fonts (piece->content->subtitle->fonts ());
        }
 
        if (piece->content->subtitle->use() && (piece->content->subtitle->burn() || _always_burn_subtitles)) {
-               _subtitles.push_back (ps);
+               _subtitles.push_back (make_pair (ps, period));
        } else {
-               Subtitle (ps);
+               Subtitle (ps, period);
        }
 }
 
@@ -789,12 +847,40 @@ Player::seek (DCPTime time, bool accurate)
        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);
+                       i->done = false;
                }
        }
 
        if (accurate) {
-               _last_video_time = time - DCPTime::from_frames (1, _film->video_frame_rate ());
+               _last_time = time - DCPTime::from_frames (1, _film->video_frame_rate ());
        } else {
-               _last_video_time = optional<DCPTime> ();
+               _last_time = optional<DCPTime> ();
+       }
+}
+
+shared_ptr<Resampler>
+Player::resampler (shared_ptr<const AudioContent> content, AudioStreamPtr stream, bool create)
+{
+       ResamplerMap::const_iterator i = _resamplers.find (make_pair (content, stream));
+       if (i != _resamplers.end ()) {
+               return i->second;
        }
+
+       if (!create) {
+               return shared_ptr<Resampler> ();
+       }
+
+       LOG_GENERAL (
+               "Creating new resampler from %1 to %2 with %3 channels",
+               stream->frame_rate(),
+               content->resampled_frame_rate(),
+               stream->channels()
+               );
+
+       shared_ptr<Resampler> r (
+               new Resampler (stream->frame_rate(), content->resampled_frame_rate(), stream->channels())
+               );
+
+       _resamplers[make_pair(content, stream)] = r;
+       return r;
 }