Merge 1.0
[dcpomatic.git] / src / lib / player.cc
index cacb42651b1656d706773a7b335c21c054af2458..c9f9acd942179561184fb2c32bd70e2ee65a24b9 100644 (file)
@@ -18,6 +18,7 @@
 */
 
 #include <stdint.h>
+#include <algorithm>
 #include "player.h"
 #include "film.h"
 #include "ffmpeg_decoder.h"
@@ -31,7 +32,6 @@
 #include "job.h"
 #include "image.h"
 #include "ratio.h"
-#include "resampler.h"
 #include "log.h"
 #include "scaler.h"
 
@@ -45,69 +45,20 @@ using std::map;
 using boost::shared_ptr;
 using boost::weak_ptr;
 using boost::dynamic_pointer_cast;
+using boost::optional;
 
 class Piece
 {
 public:
-       Piece (shared_ptr<Content> c)
-               : content (c)
-               , video_position (c->position ())
-               , audio_position (c->position ())
-               , repeat_to_do (0)
-               , repeat_done (0)
-       {}
-       
-       Piece (shared_ptr<Content> c, shared_ptr<Decoder> d)
+       Piece (shared_ptr<Content> c, shared_ptr<Decoder> d, FrameRateChange f)
                : content (c)
                , decoder (d)
-               , video_position (c->position ())
-               , audio_position (c->position ())
+               , frc (f)
        {}
 
-       /** Set this piece to repeat a video frame a given number of times */
-       void set_repeat (IncomingVideo video, int num)
-       {
-               repeat_video = video;
-               repeat_to_do = num;
-               repeat_done = 0;
-       }
-
-       void reset_repeat ()
-       {
-               repeat_video.image.reset ();
-               repeat_to_do = 0;
-               repeat_done = 0;
-       }
-
-       bool repeating () const
-       {
-               return repeat_done != repeat_to_do;
-       }
-
-       void repeat (Player* player)
-       {
-               player->process_video (
-                       repeat_video.weak_piece,
-                       repeat_video.image,
-                       repeat_video.eyes,
-                       repeat_done > 0,
-                       repeat_video.frame,
-                       (repeat_done + 1) * (TIME_HZ / player->_film->video_frame_rate ())
-                       );
-
-               ++repeat_done;
-       }
-       
        shared_ptr<Content> content;
        shared_ptr<Decoder> decoder;
-       /** Time of the last video we emitted relative to the start of the DCP */
-       Time video_position;
-       /** Time of the last audio we emitted relative to the start of the DCP */
-       Time audio_position;
-
-       IncomingVideo repeat_video;
-       int repeat_to_do;
-       int repeat_done;
+       FrameRateChange frc;
 };
 
 Player::Player (shared_ptr<const Film> f, shared_ptr<const Playlist> p)
@@ -120,6 +71,8 @@ Player::Player (shared_ptr<const Film> f, shared_ptr<const Playlist> p)
        , _audio_position (0)
        , _audio_merger (f->audio_channels(), bind (&Film::time_to_audio_frames, f.get(), _1), bind (&Film::audio_frames_to_time, f.get(), _1))
        , _last_emit_was_black (false)
+       , _just_did_inaccurate_seek (false)
+       , _approximate_size (false)
 {
        _playlist_changed_connection = _playlist->Changed.connect (bind (&Player::playlist_changed, this));
        _playlist_content_changed_connection = _playlist->ContentChanged.connect (bind (&Player::content_changed, this, _1, _2, _3));
@@ -146,110 +99,131 @@ Player::pass ()
                setup_pieces ();
        }
 
-       Time earliest_t = TIME_MAX;
-       shared_ptr<Piece> earliest;
-       enum {
-               VIDEO,
-               AUDIO
-       } type = VIDEO;
+       /* Interrogate all our pieces to find the one with the earliest decoded data */
+
+       shared_ptr<Piece> earliest_piece;
+       shared_ptr<Decoded> earliest_decoded;
+       DCPTime earliest_time = TIME_MAX;
+       DCPTime earliest_audio = TIME_MAX;
 
        for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
-               if ((*i)->decoder->done ()) {
-                       continue;
-               }
 
-               shared_ptr<VideoDecoder> vd = dynamic_pointer_cast<VideoDecoder> ((*i)->decoder);
-               shared_ptr<AudioDecoder> ad = dynamic_pointer_cast<AudioDecoder> ((*i)->decoder);
+               shared_ptr<Decoded> dec = (*i)->decoder->peek ();
 
-               if (_video && vd) {
-                       if ((*i)->video_position < earliest_t) {
-                               earliest_t = (*i)->video_position;
-                               earliest = *i;
-                               type = VIDEO;
-                       }
+               if (dec) {
+                       dec->set_dcp_times ((*i)->frc.speed_up, (*i)->content->position() - (*i)->content->trim_start());
                }
 
-               if (_audio && ad && ad->has_audio ()) {
-                       if ((*i)->audio_position < earliest_t) {
-                               earliest_t = (*i)->audio_position;
-                               earliest = *i;
-                               type = AUDIO;
-                       }
+               if (dec && dec->dcp_time < earliest_time) {
+                       earliest_piece = *i;
+                       earliest_decoded = dec;
+                       earliest_time = dec->dcp_time;
                }
-       }
 
-       if (!earliest) {
+               if (dynamic_pointer_cast<DecodedAudio> (dec) && dec->dcp_time < earliest_audio) {
+                       earliest_audio = dec->dcp_time;
+               }
+       }
+               
+       if (!earliest_piece) {
                flush ();
                return true;
        }
 
-       switch (type) {
-       case VIDEO:
-               if (earliest_t > _video_position) {
-                       emit_black ();
-               } else {
-                       if (earliest->repeating ()) {
-                               earliest->repeat (this);
+       if (earliest_audio != TIME_MAX) {
+               TimedAudioBuffers<DCPTime> tb = _audio_merger.pull (max (int64_t (0), earliest_audio));
+               Audio (tb.audio, tb.time);
+               /* This assumes that the audio_frames_to_time conversion is exact
+                  so that there are no accumulated errors caused by rounding.
+               */
+               _audio_position += _film->audio_frames_to_time (tb.audio->frames ());
+       }
+
+       /* Emit the earliest thing */
+
+       shared_ptr<DecodedVideo> dv = dynamic_pointer_cast<DecodedVideo> (earliest_decoded);
+       shared_ptr<DecodedAudio> da = dynamic_pointer_cast<DecodedAudio> (earliest_decoded);
+       shared_ptr<DecodedSubtitle> ds = dynamic_pointer_cast<DecodedSubtitle> (earliest_decoded);
+
+       /* Will be set to false if we shouldn't consume the peeked DecodedThing */
+       bool consume = true;
+
+       /* This is the margin either side of _{video,audio}_position that we will accept
+          as a starting point for a frame consecutive to the previous.
+       */
+       DCPTime const margin = TIME_HZ / (2 * _film->video_frame_rate ());
+       
+       if (dv && _video) {
+
+               if (_just_did_inaccurate_seek) {
+
+                       /* Just emit; no subtlety */
+                       emit_video (earliest_piece, dv);
+                       step_video_position (dv);
+                       
+               } else if (dv->dcp_time - _video_position > margin) {
+
+                       /* Too far ahead */
+
+                       list<shared_ptr<Piece> >::iterator i = _pieces.begin();
+                       while (i != _pieces.end() && ((*i)->content->position() >= _video_position || _video_position >= (*i)->content->end())) {
+                               ++i;
+                       }
+
+                       if (i == _pieces.end() || !_last_incoming_video.video || !_have_valid_pieces) {
+                               /* We're outside all video content */
+                               emit_black ();
                        } else {
-                               earliest->decoder->pass ();
+                               /* We're inside some video; repeat the frame */
+                               _last_incoming_video.video->dcp_time = _video_position;
+                               emit_video (_last_incoming_video.weak_piece, _last_incoming_video.video);
+                               step_video_position (_last_incoming_video.video);
                        }
-               }
-               break;
 
-       case AUDIO:
-               if (earliest_t > _audio_position) {
-                       emit_silence (_film->time_to_audio_frames (earliest_t - _audio_position));
+                       consume = false;
+
+               } else if (abs (dv->dcp_time - _video_position) < margin) {
+                       /* We're ok */
+                       emit_video (earliest_piece, dv);
+                       step_video_position (dv);
                } else {
-                       earliest->decoder->pass ();
-
-                       if (earliest->decoder->done()) {
-                               shared_ptr<AudioContent> ac = dynamic_pointer_cast<AudioContent> (earliest->content);
-                               assert (ac);
-                               shared_ptr<Resampler> re = resampler (ac, false);
-                               if (re) {
-                                       shared_ptr<const AudioBuffers> b = re->flush ();
-                                       if (b->frames ()) {
-                                               process_audio (earliest, b, ac->audio_length ());
-                                       }
-                               }
-                       }
+                       /* Too far behind: skip */
                }
-               break;
-       }
 
-       if (_audio) {
-               boost::optional<Time> audio_done_up_to;
-               for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
-                       if ((*i)->decoder->done ()) {
-                               continue;
-                       }
+               _just_did_inaccurate_seek = false;
 
-                       if (dynamic_pointer_cast<AudioDecoder> ((*i)->decoder)) {
-                               audio_done_up_to = min (audio_done_up_to.get_value_or (TIME_MAX), (*i)->audio_position);
-                       }
-               }
+       } else if (da && _audio) {
 
-               if (audio_done_up_to) {
-                       TimedAudioBuffers<Time> tb = _audio_merger.pull (audio_done_up_to.get ());
-                       Audio (tb.audio, tb.time);
-                       _audio_position += _film->audio_frames_to_time (tb.audio->frames ());
+               if (da->dcp_time - _audio_position > margin) {
+                       /* Too far ahead */
+                       emit_silence (da->dcp_time - _audio_position);
+                       consume = false;
+               } else if (abs (da->dcp_time - _audio_position) < margin) {
+                       /* We're ok */
+                       emit_audio (earliest_piece, da);
+               } else {
+                       /* Too far behind: skip */
                }
-       }
                
+       } else if (ds && _video) {
+               _in_subtitle.piece = earliest_piece;
+               _in_subtitle.subtitle = ds;
+               update_subtitle ();
+       }
+
+       if (consume) {
+               earliest_piece->decoder->consume ();
+       }                       
+       
        return false;
 }
 
-/** @param extra Amount of extra time to add to the content frame's time (for repeat) */
 void
-Player::process_video (weak_ptr<Piece> weak_piece, shared_ptr<const Image> image, Eyes eyes, bool same, VideoContent::Frame frame, Time extra)
+Player::emit_video (weak_ptr<Piece> weak_piece, shared_ptr<DecodedVideo> video)
 {
        /* Keep a note of what came in so that we can repeat it if required */
        _last_incoming_video.weak_piece = weak_piece;
-       _last_incoming_video.image = image;
-       _last_incoming_video.eyes = eyes;
-       _last_incoming_video.same = same;
-       _last_incoming_video.frame = frame;
-       _last_incoming_video.extra = extra;
+       _last_incoming_video.video = video;
        
        shared_ptr<Piece> piece = weak_piece.lock ();
        if (!piece) {
@@ -259,23 +233,18 @@ Player::process_video (weak_ptr<Piece> weak_piece, shared_ptr<const Image> image
        shared_ptr<VideoContent> content = dynamic_pointer_cast<VideoContent> (piece->content);
        assert (content);
 
-       FrameRateConversion frc (content->video_frame_rate(), _film->video_frame_rate());
-       if (frc.skip && (frame % 2) == 1) {
-               return;
-       }
+       FrameRateChange frc (content->video_frame_rate(), _film->video_frame_rate());
 
-       Time const relative_time = (frame * frc.factor() * TIME_HZ / _film->video_frame_rate());
-       if (content->trimmed (relative_time)) {
-               return;
-       }
-
-       Time const time = content->position() + relative_time + extra - content->trim_start ();
        float const ratio = content->ratio() ? content->ratio()->ratio() : content->video_size_after_crop().ratio();
-       libdcp::Size const image_size = fit_ratio_within (ratio, _video_container_size);
+       libdcp::Size image_size = fit_ratio_within (ratio, _video_container_size);
+       if (_approximate_size) {
+               image_size.width &= ~3;
+               image_size.height &= ~3;
+       }
 
        shared_ptr<PlayerImage> pi (
                new PlayerImage (
-                       image,
+                       video->image,
                        content->crop(),
                        image_size,
                        _video_container_size,
@@ -283,11 +252,15 @@ Player::process_video (weak_ptr<Piece> weak_piece, shared_ptr<const Image> image
                        )
                );
        
-       if (_film->with_subtitles () && _out_subtitle.image && time >= _out_subtitle.from && time <= _out_subtitle.to) {
+       if (
+               _film->with_subtitles () &&
+               _out_subtitle.image &&
+               video->dcp_time >= _out_subtitle.from && video->dcp_time <= _out_subtitle.to
+               ) {
 
                Position<int> const container_offset (
                        (_video_container_size.width - image_size.width) / 2,
-                       (_video_container_size.height - image_size.width) / 2
+                       (_video_container_size.height - image_size.height) / 2
                        );
 
                pi->set_subtitle (_out_subtitle.image, _out_subtitle.position + container_offset);
@@ -297,18 +270,25 @@ Player::process_video (weak_ptr<Piece> weak_piece, shared_ptr<const Image> image
        _last_video = piece->content;
 #endif
 
-       Video (pi, eyes, content->colour_conversion(), same, time);
-
+       Video (pi, video->eyes, content->colour_conversion(), video->same, video->dcp_time);
+       
        _last_emit_was_black = false;
-       _video_position = piece->video_position = (time + TIME_HZ / _film->video_frame_rate());
+}
 
-       if (frc.repeat > 1 && !piece->repeating ()) {
-               piece->set_repeat (_last_incoming_video, frc.repeat - 1);
+void
+Player::step_video_position (shared_ptr<DecodedVideo> video)
+{
+       /* This is a bit of a hack; don't update _video_position if EYES_RIGHT is on its way */
+       if (video->eyes != EYES_LEFT) {
+               /* This assumes that the video_frames_to_time conversion is exact
+                  so that there are no accumulated errors caused by rounding.
+               */
+               _video_position += _film->video_frames_to_time (1);
        }
 }
 
 void
-Player::process_audio (weak_ptr<Piece> weak_piece, shared_ptr<const AudioBuffers> audio, AudioContent::Frame frame)
+Player::emit_audio (weak_ptr<Piece> weak_piece, shared_ptr<DecodedAudio> audio)
 {
        shared_ptr<Piece> piece = weak_piece.lock ();
        if (!piece) {
@@ -320,61 +300,49 @@ Player::process_audio (weak_ptr<Piece> weak_piece, shared_ptr<const AudioBuffers
 
        /* Gain */
        if (content->audio_gain() != 0) {
-               shared_ptr<AudioBuffers> gain (new AudioBuffers (audio));
+               shared_ptr<AudioBuffers> gain (new AudioBuffers (audio->data));
                gain->apply_gain (content->audio_gain ());
-               audio = gain;
+               audio->data = gain;
        }
 
-       /* Resample */
-       if (content->content_audio_frame_rate() != content->output_audio_frame_rate()) {
-               shared_ptr<Resampler> r = resampler (content, true);
-               pair<shared_ptr<const AudioBuffers>, AudioContent::Frame> ro = r->run (audio, frame);
-               audio = ro.first;
-               frame = ro.second;
-       }
-       
-       Time const relative_time = _film->audio_frames_to_time (frame);
-
-       if (content->trimmed (relative_time)) {
+       if (content->trimmed (audio->dcp_time - content->position ())) {
                return;
        }
 
-       Time time = content->position() + (content->audio_delay() * TIME_HZ / 1000) + relative_time - content->trim_start ();
-       
        /* Remap channels */
-       shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), audio->frames()));
+       shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), audio->data->frames()));
        dcp_mapped->make_silent ();
        list<pair<int, libdcp::Channel> > map = content->audio_mapping().content_to_dcp ();
        for (list<pair<int, libdcp::Channel> >::iterator i = map.begin(); i != map.end(); ++i) {
-               if (i->first < audio->channels() && i->second < dcp_mapped->channels()) {
-                       dcp_mapped->accumulate_channel (audio.get(), i->first, i->second);
+               if (i->first < audio->data->channels() && i->second < dcp_mapped->channels()) {
+                       dcp_mapped->accumulate_channel (audio->data.get(), i->first, i->second);
                }
        }
 
-       audio = dcp_mapped;
+       audio->data = dcp_mapped;
 
-       /* We must cut off anything that comes before the start of all time */
-       if (time < 0) {
-               int const frames = - time * _film->audio_frame_rate() / TIME_HZ;
-               if (frames >= audio->frames ()) {
+       /* Delay */
+       audio->dcp_time += content->audio_delay() * TIME_HZ / 1000;
+       if (audio->dcp_time < 0) {
+               int const frames = - audio->dcp_time * _film->audio_frame_rate() / TIME_HZ;
+               if (frames >= audio->data->frames ()) {
                        return;
                }
 
-               shared_ptr<AudioBuffers> trimmed (new AudioBuffers (audio->channels(), audio->frames() - frames));
-               trimmed->copy_from (audio.get(), audio->frames() - frames, frames, 0);
+               shared_ptr<AudioBuffers> trimmed (new AudioBuffers (audio->data->channels(), audio->data->frames() - frames));
+               trimmed->copy_from (audio->data.get(), audio->data->frames() - frames, frames, 0);
 
-               audio = trimmed;
-               time = 0;
+               audio->data = trimmed;
+               audio->dcp_time = 0;
        }
 
-       _audio_merger.push (audio, time);
-       piece->audio_position += _film->audio_frames_to_time (audio->frames ());
+       _audio_merger.push (audio->data, audio->dcp_time);
 }
 
 void
 Player::flush ()
 {
-       TimedAudioBuffers<Time> tb = _audio_merger.flush ();
+       TimedAudioBuffers<DCPTime> tb = _audio_merger.flush ();
        if (_audio && tb.audio) {
                Audio (tb.audio, tb.time);
                _audio_position += _film->audio_frames_to_time (tb.audio->frames ());
@@ -385,7 +353,7 @@ Player::flush ()
        }
 
        while (_audio && _audio_position < _video_position) {
-               emit_silence (_film->time_to_audio_frames (_video_position - _audio_position));
+               emit_silence (_video_position - _audio_position);
        }
        
 }
@@ -395,7 +363,7 @@ Player::flush ()
  *  @return true on error
  */
 void
-Player::seek (Time t, bool accurate)
+Player::seek (DCPTime t, bool accurate)
 {
        if (!_have_valid_pieces) {
                setup_pieces ();
@@ -406,92 +374,113 @@ Player::seek (Time t, bool accurate)
        }
 
        for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
-               shared_ptr<VideoContent> vc = dynamic_pointer_cast<VideoContent> ((*i)->content);
-               if (!vc) {
-                       continue;
-               }
-
                /* s is the offset of t from the start position of this content */
-               Time s = t - vc->position ();
-               s = max (static_cast<Time> (0), s);
-               s = min (vc->length_after_trim(), s);
+               DCPTime s = t - (*i)->content->position ();
+               s = max (static_cast<DCPTime> (0), s);
+               s = min ((*i)->content->length_after_trim(), s);
 
-               /* Hence set the piece positions to the `global' time */
-               (*i)->video_position = (*i)->audio_position = vc->position() + s;
+               /* Convert this to the content time */
+               ContentTime ct = (s * (*i)->frc.speed_up) + (*i)->content->trim_start ();
 
                /* And seek the decoder */
-               dynamic_pointer_cast<VideoDecoder>((*i)->decoder)->seek (
-                       vc->time_to_content_video_frames (s + vc->trim_start ()), accurate
-                       );
-
-               (*i)->reset_repeat ();
+               (*i)->decoder->seek (ct, accurate);
        }
 
-       _video_position = _audio_position = t;
+       _video_position = time_round_up (t, TIME_HZ / _film->video_frame_rate());
+       _audio_position = time_round_up (t, TIME_HZ / _film->audio_frame_rate());
 
-       /* XXX: don't seek audio because we don't need to... */
+       _audio_merger.clear (_audio_position);
+
+       if (!accurate) {
+               /* We just did an inaccurate seek, so it's likely that the next thing seen
+                  out of pass() will be a fair distance from _{video,audio}_position.  Setting
+                  this flag stops pass() from trying to fix that: we assume that if it
+                  was an inaccurate seek then the caller does not care too much about
+                  inserting black/silence to keep the time tidy.
+               */
+               _just_did_inaccurate_seek = true;
+       }
 }
 
 void
 Player::setup_pieces ()
 {
        list<shared_ptr<Piece> > old_pieces = _pieces;
-
        _pieces.clear ();
 
        ContentList content = _playlist->content ();
-       sort (content.begin(), content.end(), ContentSorter ());
 
        for (ContentList::iterator i = content.begin(); i != content.end(); ++i) {
 
-               shared_ptr<Piece> piece (new Piece (*i));
-
-               /* XXX: into content? */
+               shared_ptr<Decoder> decoder;
+               optional<FrameRateChange> frc;
 
                shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<const FFmpegContent> (*i);
                if (fc) {
-                       shared_ptr<FFmpegDecoder> fd (new FFmpegDecoder (_film, fc, _video, _audio));
-                       
-                       fd->Video.connect (bind (&Player::process_video, this, weak_ptr<Piece> (piece), _1, _2, _3, _4, 0));
-                       fd->Audio.connect (bind (&Player::process_audio, this, weak_ptr<Piece> (piece), _1, _2));
-                       fd->Subtitle.connect (bind (&Player::process_subtitle, this, weak_ptr<Piece> (piece), _1, _2, _3, _4));
-
-                       fd->seek (fc->time_to_content_video_frames (fc->trim_start ()), true);
-                       piece->decoder = fd;
+                       decoder.reset (new FFmpegDecoder (_film, fc, _video, _audio));
+                       frc = FrameRateChange (fc->video_frame_rate(), _film->video_frame_rate());
                }
                
                shared_ptr<const ImageContent> ic = dynamic_pointer_cast<const ImageContent> (*i);
                if (ic) {
-                       bool reusing = false;
-                       
                        /* See if we can re-use an old ImageDecoder */
                        for (list<shared_ptr<Piece> >::const_iterator j = old_pieces.begin(); j != old_pieces.end(); ++j) {
                                shared_ptr<ImageDecoder> imd = dynamic_pointer_cast<ImageDecoder> ((*j)->decoder);
                                if (imd && imd->content() == ic) {
-                                       piece = *j;
-                                       reusing = true;
+                                       decoder = imd;
                                }
                        }
 
-                       if (!reusing) {
-                               shared_ptr<ImageDecoder> id (new ImageDecoder (_film, ic));
-                               id->Video.connect (bind (&Player::process_video, this, weak_ptr<Piece> (piece), _1, _2, _3, _4, 0));
-                               piece->decoder = id;
+                       if (!decoder) {
+                               decoder.reset (new ImageDecoder (_film, ic));
                        }
+
+                       frc = FrameRateChange (ic->video_frame_rate(), _film->video_frame_rate());
                }
 
                shared_ptr<const SndfileContent> sc = dynamic_pointer_cast<const SndfileContent> (*i);
                if (sc) {
-                       shared_ptr<AudioDecoder> sd (new SndfileDecoder (_film, sc));
-                       sd->Audio.connect (bind (&Player::process_audio, this, weak_ptr<Piece> (piece), _1, _2));
+                       decoder.reset (new SndfileDecoder (_film, sc));
+
+                       /* Working out the frc for this content is a bit tricky: what if it overlaps
+                          two pieces of video content with different frame rates?  For now, use
+                          the one with the best overlap.
+                       */
+
+                       DCPTime best_overlap_t = 0;
+                       shared_ptr<VideoContent> best_overlap;
+                       for (ContentList::iterator j = content.begin(); j != content.end(); ++j) {
+                               shared_ptr<VideoContent> vc = dynamic_pointer_cast<VideoContent> (*j);
+                               if (!vc) {
+                                       continue;
+                               }
 
-                       piece->decoder = sd;
+                               DCPTime const overlap = max (vc->position(), sc->position()) - min (vc->end(), sc->end());
+                               if (overlap > best_overlap_t) {
+                                       best_overlap = vc;
+                                       best_overlap_t = overlap;
+                               }
+                       }
+
+                       if (best_overlap) {
+                               frc = FrameRateChange (best_overlap->video_frame_rate(), _film->video_frame_rate ());
+                       } else {
+                               /* No video overlap; e.g. if the DCP is just audio */
+                               frc = FrameRateChange (_film->video_frame_rate(), _film->video_frame_rate ());
+                       }
                }
 
-               _pieces.push_back (piece);
+               decoder->seek ((*i)->trim_start (), true);
+               
+               _pieces.push_back (shared_ptr<Piece> (new Piece (*i, decoder, frc.get ())));
        }
 
        _have_valid_pieces = true;
+
+       /* The Piece for the _last_incoming_video will no longer be valid */
+       _last_incoming_video.video.reset ();
+
+       _video_position = _audio_position = 0;
 }
 
 void
@@ -552,29 +541,6 @@ Player::set_video_container_size (libdcp::Size s)
                );
 }
 
-shared_ptr<Resampler>
-Player::resampler (shared_ptr<AudioContent> c, bool create)
-{
-       map<shared_ptr<AudioContent>, shared_ptr<Resampler> >::iterator i = _resamplers.find (c);
-       if (i != _resamplers.end ()) {
-               return i->second;
-       }
-
-       if (!create) {
-               return shared_ptr<Resampler> ();
-       }
-
-       _film->log()->log (
-               String::compose (
-                       "Creating new resampler for %1 to %2 with %3 channels", c->content_audio_frame_rate(), c->output_audio_frame_rate(), c->audio_channels()
-                       )
-               );
-       
-       shared_ptr<Resampler> r (new Resampler (c->content_audio_frame_rate(), c->output_audio_frame_rate(), c->audio_channels()));
-       _resamplers[c] = r;
-       return r;
-}
-
 void
 Player::emit_black ()
 {
@@ -588,17 +554,18 @@ Player::emit_black ()
 }
 
 void
-Player::emit_silence (OutputAudioFrame most)
+Player::emit_silence (DCPTime most)
 {
        if (most == 0) {
                return;
        }
        
-       OutputAudioFrame N = min (most, _film->audio_frame_rate() / 2);
-       shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), N));
+       DCPTime t = min (most, TIME_HZ / 2);
+       shared_ptr<AudioBuffers> silence (new AudioBuffers (_film->audio_channels(), t * _film->audio_frame_rate() / TIME_HZ));
        silence->make_silent ();
        Audio (silence, _audio_position);
-       _audio_position += _film->audio_frames_to_time (N);
+       
+       _audio_position += t;
 }
 
 void
@@ -614,18 +581,6 @@ Player::film_changed (Film::Property p)
        }
 }
 
-void
-Player::process_subtitle (weak_ptr<Piece> weak_piece, shared_ptr<Image> image, dcpomatic::Rect<double> rect, Time from, Time to)
-{
-       _in_subtitle.piece = weak_piece;
-       _in_subtitle.image = image;
-       _in_subtitle.rect = rect;
-       _in_subtitle.from = from;
-       _in_subtitle.to = to;
-
-       update_subtitle ();
-}
-
 void
 Player::update_subtitle ()
 {
@@ -634,7 +589,7 @@ Player::update_subtitle ()
                return;
        }
 
-       if (!_in_subtitle.image) {
+       if (!_in_subtitle.subtitle->image) {
                _out_subtitle.image.reset ();
                return;
        }
@@ -642,7 +597,7 @@ Player::update_subtitle ()
        shared_ptr<SubtitleContent> sc = dynamic_pointer_cast<SubtitleContent> (piece->content);
        assert (sc);
 
-       dcpomatic::Rect<double> in_rect = _in_subtitle.rect;
+       dcpomatic::Rect<double> in_rect = _in_subtitle.subtitle->rect;
        libdcp::Size scaled_size;
 
        in_rect.y += sc->subtitle_offset ();
@@ -665,15 +620,16 @@ Player::update_subtitle ()
        
        _out_subtitle.position.x = rint (_video_container_size.width * (in_rect.x + (in_rect.width * (1 - sc->subtitle_scale ()) / 2)));
        _out_subtitle.position.y = rint (_video_container_size.height * (in_rect.y + (in_rect.height * (1 - sc->subtitle_scale ()) / 2)));
-       
-       _out_subtitle.image = _in_subtitle.image->scale (
+
+       _out_subtitle.image = _in_subtitle.subtitle->image->scale (
                scaled_size,
                Scaler::from_id ("bicubic"),
-               _in_subtitle.image->pixel_format (),
+               PIX_FMT_RGBA,
                true
                );
-       _out_subtitle.from = _in_subtitle.from + piece->content->position ();
-       _out_subtitle.to = _in_subtitle.to + piece->content->position ();
+
+       _out_subtitle.from = _in_subtitle.subtitle->dcp_time;
+       _out_subtitle.to = _in_subtitle.subtitle->dcp_time_to;
 }
 
 /** Re-emit the last frame that was emitted, using current settings for crop, ratio, scaler and subtitles.
@@ -682,22 +638,25 @@ Player::update_subtitle ()
 bool
 Player::repeat_last_video ()
 {
-       if (!_last_incoming_video.image || !_have_valid_pieces) {
+       if (!_last_incoming_video.video || !_have_valid_pieces) {
                return false;
        }
 
-       process_video (
+       emit_video (
                _last_incoming_video.weak_piece,
-               _last_incoming_video.image,
-               _last_incoming_video.eyes,
-               _last_incoming_video.same,
-               _last_incoming_video.frame,
-               _last_incoming_video.extra
+               _last_incoming_video.video
                );
 
        return true;
 }
 
+void
+Player::set_approximate_size ()
+{
+       _approximate_size = true;
+}
+                             
+
 PlayerImage::PlayerImage (
        shared_ptr<const Image> in,
        Crop crop,
@@ -722,10 +681,10 @@ PlayerImage::set_subtitle (shared_ptr<const Image> image, Position<int> pos)
 }
 
 shared_ptr<Image>
-PlayerImage::image ()
+PlayerImage::image (AVPixelFormat format, bool aligned)
 {
-       shared_ptr<Image> out = _in->crop_scale_window (_crop, _inter_size, _out_size, _scaler, PIX_FMT_RGB24, false);
-
+       shared_ptr<Image> out = _in->crop_scale_window (_crop, _inter_size, _out_size, _scaler, format, aligned);
+       
        Position<int> const container_offset ((_out_size.width - _inter_size.width) / 2, (_out_size.height - _inter_size.width) / 2);
 
        if (_subtitle_image) {
@@ -734,3 +693,4 @@ PlayerImage::image ()
 
        return out;
 }
+