If we are requesting audio from before the start of a piece of content we need to...
[dcpomatic.git] / src / lib / player.cc
index 396dc990684667b93060df953cb767f6e6246335..de513ea170132228b8898e1ea17a255e611ec08e 100644 (file)
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2013-2014 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2013-2015 Carl Hetherington <cth@carlh.net>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -73,6 +73,7 @@ Player::Player (shared_ptr<const Film> f, shared_ptr<const Playlist> p)
        , _playlist (p)
        , _have_valid_pieces (false)
        , _approximate_size (false)
+       , _ignore_video (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));
@@ -173,6 +174,11 @@ Player::setup_pieces ()
                        frc = best_overlap_frc;
                }
 
+               shared_ptr<VideoDecoder> vd = dynamic_pointer_cast<VideoDecoder> (decoder);
+               if (vd && _ignore_video) {
+                       vd->set_ignore_video ();
+               }
+
                _pieces.push_back (shared_ptr<Piece> (new Piece (*i, decoder, frc.get ())));
        }
 
@@ -208,7 +214,9 @@ Player::content_changed (weak_ptr<Content> w, int property, bool frequent)
                property == SubtitleContentProperty::SUBTITLE_Y_SCALE ||
                property == VideoContentProperty::VIDEO_CROP ||
                property == VideoContentProperty::VIDEO_SCALE ||
-               property == VideoContentProperty::VIDEO_FRAME_RATE
+               property == VideoContentProperty::VIDEO_FRAME_RATE ||
+               property == VideoContentProperty::VIDEO_FADE_IN ||
+               property == VideoContentProperty::VIDEO_FADE_OUT
                ) {
                
                Changed (frequent);
@@ -321,7 +329,7 @@ Player::get_video (DCPTime time, bool accurate)
        if (!_have_valid_pieces) {
                setup_pieces ();
        }
-       
+
        list<shared_ptr<Piece> > ov = overlaps<VideoContent> (
                time,
                time + DCPTime::from_frames (1, _film->video_frame_rate ())
@@ -337,9 +345,9 @@ Player::get_video (DCPTime time, bool accurate)
 
                shared_ptr<Piece> piece = ov.back ();
                shared_ptr<VideoDecoder> decoder = dynamic_pointer_cast<VideoDecoder> (piece->decoder);
-               assert (decoder);
+               DCPOMATIC_ASSERT (decoder);
                shared_ptr<VideoContent> content = dynamic_pointer_cast<VideoContent> (piece->content);
-               assert (content);
+               DCPOMATIC_ASSERT (content);
 
                list<ContentVideo> content_video = decoder->get_video (dcp_to_content_video (piece, time), accurate);
                if (content_video.empty ()) {
@@ -352,7 +360,7 @@ Player::get_video (DCPTime time, bool accurate)
                        image_size.width &= ~3;
                        image_size.height &= ~3;
                }
-               
+
                for (list<ContentVideo>::const_iterator i = content_video.begin(); i != content_video.end(); ++i) {
                        pvf.push_back (
                                shared_ptr<PlayerVideo> (
@@ -415,9 +423,9 @@ Player::get_audio (DCPTime time, DCPTime length, bool accurate)
        for (list<shared_ptr<Piece> >::iterator i = ov.begin(); i != ov.end(); ++i) {
 
                shared_ptr<AudioContent> content = dynamic_pointer_cast<AudioContent> ((*i)->content);
-               assert (content);
+               DCPOMATIC_ASSERT (content);
                shared_ptr<AudioDecoder> decoder = dynamic_pointer_cast<AudioDecoder> ((*i)->decoder);
-               assert (decoder);
+               DCPOMATIC_ASSERT (decoder);
 
                if (content->audio_frame_rate() == 0) {
                        /* This AudioContent has no audio (e.g. if it is an FFmpegContent with no
@@ -428,19 +436,24 @@ Player::get_audio (DCPTime time, DCPTime length, bool accurate)
 
                /* The time that we should request from the content */
                DCPTime request = time - DCPTime::from_seconds (content->audio_delay() / 1000.0);
+               AudioFrame request_frames = length_frames;
                DCPTime offset;
                if (request < DCPTime ()) {
                        /* We went off the start of the content, so we will need to offset
                           the stuff we get back.
                        */
                        offset = -request;
+                       request_frames += request.frames (_film->audio_frame_rate ());
+                       if (request_frames < 0) {
+                               request_frames = 0;
+                       }
                        request = DCPTime ();
                }
 
                AudioFrame const content_frame = dcp_to_content_audio (*i, request);
 
                /* Audio from this piece's decoder (which might be more or less than what we asked for) */
-               shared_ptr<ContentAudio> all = decoder->get_audio (content_frame, length_frames, accurate);
+               shared_ptr<ContentAudio> all = decoder->get_audio (content_frame, request_frames, accurate);
 
                /* Gain */
                if (content->audio_gain() != 0) {
@@ -472,7 +485,7 @@ Player::get_audio (DCPTime time, DCPTime length, bool accurate)
                        all->audio.get(),
                        content_frame - all->frame,
                        offset.frames (_film->audio_frame_rate()),
-                       min (AudioFrame (all->audio->frames()), length_frames) - offset.frames (_film->audio_frame_rate ())
+                       min (AudioFrame (all->audio->frames()), request_frames)
                        );
        }
 
@@ -488,13 +501,13 @@ Player::dcp_to_content_video (shared_ptr<const Piece> piece, DCPTime t) const
        s = DCPTime (min (piece->content->length_after_trim().get(), s.get()));
 
        /* Convert this to the content frame */
-       return DCPTime (s + piece->content->trim_start()).frames (_film->video_frame_rate()) * piece->frc.factor ();
+       return DCPTime (s + piece->content->trim_start()).frames (_film->video_frame_rate()) / piece->frc.factor ();
 }
 
 DCPTime
 Player::content_video_to_dcp (shared_ptr<const Piece> piece, VideoFrame f) const
 {
-       DCPTime t = DCPTime::from_frames (f / piece->frc.factor (), _film->video_frame_rate()) - piece->content->trim_start () + piece->content->position ();
+       DCPTime t = DCPTime::from_frames (f * piece->frc.factor (), _film->video_frame_rate()) - piece->content->trim_start () + piece->content->position ();
        if (t < DCPTime ()) {
                t = DCPTime ();
        }
@@ -551,12 +564,6 @@ Player::get_subtitles (DCPTime time, DCPTime length, bool starting)
                        continue;
                }
 
-               /* XXX: this will break down if we have multiple subtitle content */
-               ps.language = subtitle_content->subtitle_language();
-               if (ps.language.empty ()) {
-                       ps.language = _("Unknown");
-               }
-
                shared_ptr<SubtitleDecoder> subtitle_decoder = dynamic_pointer_cast<SubtitleDecoder> ((*j)->decoder);
                ContentTime const from = dcp_to_content_subtitle (*j, time);
                /* XXX: this video_frame_rate() should be the rate that the subtitle content has been prepared for */
@@ -592,3 +599,32 @@ Player::get_subtitles (DCPTime time, DCPTime length, bool starting)
 
        return ps;
 }
+
+list<shared_ptr<Font> >
+Player::get_subtitle_fonts ()
+{
+       if (!_have_valid_pieces) {
+               setup_pieces ();
+       }
+
+       list<shared_ptr<Font> > fonts;
+       BOOST_FOREACH (shared_ptr<Piece>& p, _pieces) {
+               shared_ptr<SubtitleContent> sc = dynamic_pointer_cast<SubtitleContent> (p->content);
+               if (sc) {
+                       /* XXX: things may go wrong if there are duplicate font IDs
+                          with different font files.
+                       */
+                       list<shared_ptr<Font> > f = sc->fonts ();
+                       copy (f.begin(), f.end(), back_inserter (fonts));
+               }
+       }
+
+       return fonts;
+}
+
+/** Set this player never to produce any video data */
+void
+Player::set_ignore_video ()
+{
+       _ignore_video = true;
+}