Various fixes to audio play wrt trimming and push/pull merger API.
[dcpomatic.git] / src / lib / player.cc
index 8cc1849e865f0909001a55374954bca5fbe48247..8583a429bd00d534e879b8257bc9f2c13e4274b3 100644 (file)
@@ -24,6 +24,8 @@
 #include "ffmpeg_content.h"
 #include "still_image_decoder.h"
 #include "still_image_content.h"
+#include "moving_image_decoder.h"
+#include "moving_image_content.h"
 #include "sndfile_decoder.h"
 #include "sndfile_content.h"
 #include "subtitle_content.h"
@@ -53,15 +55,15 @@ class Piece
 public:
        Piece (shared_ptr<Content> c)
                : content (c)
-               , video_position (c->start ())
-               , audio_position (c->start ())
+               , video_position (c->position ())
+               , audio_position (c->position ())
        {}
        
        Piece (shared_ptr<Content> c, shared_ptr<Decoder> d)
                : content (c)
                , decoder (d)
-               , video_position (c->start ())
-               , audio_position (c->start ())
+               , video_position (c->position ())
+               , audio_position (c->position ())
        {}
        
        shared_ptr<Content> content;
@@ -81,7 +83,7 @@ std::ostream& operator<<(std::ostream& s, Piece const & p)
                s << "\tsndfile    ";
        }
        
-       s << " at " << p.content->start() << " until " << p.content->end();
+       s << " at " << p.content->position() << " until " << p.content->end();
        
        return s;
 }
@@ -95,11 +97,12 @@ Player::Player (shared_ptr<const Film> f, shared_ptr<const Playlist> p)
        , _have_valid_pieces (false)
        , _video_position (0)
        , _audio_position (0)
-       , _audio_buffers (f->audio_channels(), 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)
 {
-       _playlist->Changed.connect (bind (&Player::playlist_changed, this));
-       _playlist->ContentChanged.connect (bind (&Player::content_changed, this, _1, _2, _3));
-       _film->Changed.connect (bind (&Player::film_changed, this, _1));
+       _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));
+       _film_changed_connection = _film->Changed.connect (bind (&Player::film_changed, this, _1));
        set_video_container_size (_film->container()->size (_film->full_frame ()));
 }
 
@@ -174,7 +177,7 @@ Player::pass ()
                        emit_black ();
                } else {
 #ifdef DEBUG_PLAYER
-                       cout << "Pass " << *earliest << "\n";
+                       cout << "Pass video " << *earliest << "\n";
 #endif                 
                        earliest->decoder->pass ();
                }
@@ -183,15 +186,15 @@ Player::pass ()
        case AUDIO:
                if (earliest_t > _audio_position) {
 #ifdef DEBUG_PLAYER
-                       cout << "no audio here; emitting silence.\n";
+                       cout << "no audio here (none until " << earliest_t << "); emitting silence.\n";
 #endif
                        emit_silence (_film->time_to_audio_frames (earliest_t - _audio_position));
                } else {
 #ifdef DEBUG_PLAYER
-                       cout << "Pass " << *earliest << "\n";
-#endif                 
+                       cout << "Pass audio " << *earliest << "\n";
+#endif
                        earliest->decoder->pass ();
-                       
+
                        if (earliest->decoder->done()) {
                                shared_ptr<AudioContent> ac = dynamic_pointer_cast<AudioContent> (earliest->content);
                                assert (ac);
@@ -206,9 +209,20 @@ Player::pass ()
                }
                break;
        }
+       
+       Time audio_done_up_to = TIME_MAX;
+       for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
+               if (dynamic_pointer_cast<AudioDecoder> ((*i)->decoder)) {
+                       audio_done_up_to = min (audio_done_up_to, (*i)->audio_position);
+               }
+       }
+       
+       TimedAudioBuffers<Time> tb = _audio_merger.pull (audio_done_up_to);
+       Audio (tb.audio, tb.time);
+       _audio_position += _film->audio_frames_to_time (tb.audio->frames ());
 
 #ifdef DEBUG_PLAYER
-       cout << "\tpost pass " << _video_position << " " << _audio_position << "\n";
+       cout << "\tpost pass _video_position=" << _video_position << " _audio_position=" << _audio_position << "\n";
 #endif 
 
        return false;
@@ -230,14 +244,19 @@ Player::process_video (weak_ptr<Piece> weak_piece, shared_ptr<const Image> image
                return;
        }
 
+       Time const relative_time = (frame * frc.factor() * TIME_HZ / _film->video_frame_rate());
+       if (content->trimmed (relative_time)) {
+               return;
+       }
+       
        shared_ptr<Image> work_image = image->crop (content->crop(), true);
 
        libdcp::Size const image_size = content->ratio()->size (_video_container_size);
        
        work_image = work_image->scale_and_convert_to_rgb (image_size, _film->scaler(), true);
 
-       Time time = content->start() + (frame * frc.factor() * TIME_HZ / _film->video_frame_rate());
-       
+       Time time = content->position() + relative_time - content->trim_start ();
+           
        if (_film->with_subtitles () && _out_subtitle.image && time >= _out_subtitle.from && time <= _out_subtitle.to) {
                work_image->alpha_blend (_out_subtitle.image, _out_subtitle.position);
        }
@@ -263,6 +282,8 @@ Player::process_video (weak_ptr<Piece> weak_piece, shared_ptr<const Image> image
                time += TIME_HZ / _film->video_frame_rate();
        }
 
+       _last_emit_was_black = false;
+
        _video_position = piece->video_position = time;
 }
 
@@ -277,12 +298,22 @@ Player::process_audio (weak_ptr<Piece> weak_piece, shared_ptr<const AudioBuffers
        shared_ptr<AudioContent> content = dynamic_pointer_cast<AudioContent> (piece->content);
        assert (content);
 
+       Time const relative_time = _film->audio_frames_to_time (frame);
+
+       if (content->trimmed (relative_time)) {
+               return;
+       }
+
+       Time time = content->position() + (content->audio_delay() * TIME_HZ / 1000) + relative_time;
+       
        /* Resample */
        if (content->content_audio_frame_rate() != content->output_audio_frame_rate()) {
                shared_ptr<Resampler> r = resampler (content, true);
-               audio = r->run (audio);
+               pair<shared_ptr<const AudioBuffers>, AudioContent::Frame> ro = r->run (audio, frame);
+               audio = ro.first;
+               frame = ro.second;
        }
-
+       
        /* Remap channels */
        shared_ptr<AudioBuffers> dcp_mapped (new AudioBuffers (_film->audio_channels(), audio->frames()));
        dcp_mapped->make_silent ();
@@ -295,11 +326,6 @@ Player::process_audio (weak_ptr<Piece> weak_piece, shared_ptr<const AudioBuffers
 
        audio = dcp_mapped;
 
-       /* Convert frame to time.  After resampling, the frame time (in the DCP rate) will be T_D where
-          T_D = frame * DCP_rate / original_rate.  Hence the time in seconds is T_D / DCP_rate.
-       */
-       Time time = content->start() + (frame * TIME_HZ / _film->audio_frame_rate()) + (content->audio_delay() * TIME_HZ / 1000);
-
        /* 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;
@@ -314,48 +340,17 @@ Player::process_audio (weak_ptr<Piece> weak_piece, shared_ptr<const AudioBuffers
                time = 0;
        }
 
-       /* The time of this audio may indicate that some of our buffered audio is not going to
-          be added to any more, so it can be emitted.
-       */
-
-       if (time > _audio_position) {
-               /* We can emit some audio from our buffers */
-               OutputAudioFrame const N = _film->time_to_audio_frames (time - _audio_position);
-               if (N > _audio_buffers.frames()) {
-                       /* We need some extra silence before whatever is in the buffers */
-                       _audio_buffers.ensure_size (N);
-                       _audio_buffers.move (0, N - _audio_buffers.frames(), _audio_buffers.frames ());
-                       _audio_buffers.make_silent (0, _audio_buffers.frames());
-                       _audio_buffers.set_frames (N);
-               }
-               assert (N <= _audio_buffers.frames());
-               shared_ptr<AudioBuffers> emit (new AudioBuffers (_audio_buffers.channels(), N));
-               emit->copy_from (&_audio_buffers, N, 0, 0);
-               Audio (emit, _audio_position);
-               _audio_position = piece->audio_position = time + _film->audio_frames_to_time (N);
-
-               /* And remove it from our buffers */
-               if (_audio_buffers.frames() > N) {
-                       _audio_buffers.move (N, 0, _audio_buffers.frames() - N);
-               }
-               _audio_buffers.set_frames (_audio_buffers.frames() - N);
-       }
-
-       /* Now accumulate the new audio into our buffers */
-       _audio_buffers.ensure_size (_audio_buffers.frames() + audio->frames());
-       _audio_buffers.accumulate_frames (audio.get(), 0, 0, audio->frames ());
-       _audio_buffers.set_frames (_audio_buffers.frames() + audio->frames());
+       _audio_merger.push (audio, time);
+       piece->audio_position += _film->audio_frames_to_time (audio->frames ());
 }
 
 void
 Player::flush ()
 {
-       if (_audio_buffers.frames() > 0) {
-               shared_ptr<AudioBuffers> emit (new AudioBuffers (_audio_buffers.channels(), _audio_buffers.frames()));
-               emit->copy_from (&_audio_buffers, _audio_buffers.frames(), 0, 0);
-               Audio (emit, _audio_position);
-               _audio_position += _film->audio_frames_to_time (_audio_buffers.frames ());
-               _audio_buffers.set_frames (0);
+       TimedAudioBuffers<Time> tb = _audio_merger.flush ();
+       if (tb.audio) {
+               Audio (tb.audio, tb.time);
+               _audio_position += _film->audio_frames_to_time (tb.audio->frames ());
        }
 
        while (_video_position < _audio_position) {
@@ -390,18 +385,18 @@ Player::seek (Time t, bool accurate)
                        continue;
                }
                
-               Time s = t - vc->start ();
+               Time s = t - vc->position ();
                s = max (static_cast<Time> (0), s);
-               s = min (vc->length(), s);
+               s = min (vc->length_after_trim(), s);
 
-               (*i)->video_position = (*i)->audio_position = vc->start() + s;
+               (*i)->video_position = (*i)->audio_position = vc->position() + s;
 
                FrameRateConversion frc (vc->video_frame_rate(), _film->video_frame_rate());
                /* Here we are converting from time (in the DCP) to a frame number in the content.
                   Hence we need to use the DCP's frame rate and the double/skip correction, not
                   the source's rate.
                */
-               VideoContent::Frame f = s * _film->video_frame_rate() / (frc.factor() * TIME_HZ);
+               VideoContent::Frame f = (s + vc->trim_start ()) * _film->video_frame_rate() / (frc.factor() * TIME_HZ);
                dynamic_pointer_cast<VideoDecoder>((*i)->decoder)->seek (f, accurate);
        }
 
@@ -457,6 +452,18 @@ Player::setup_pieces ()
                        piece->decoder = id;
                }
 
+               shared_ptr<const MovingImageContent> mc = dynamic_pointer_cast<const MovingImageContent> (*i);
+               if (mc) {
+                       shared_ptr<MovingImageDecoder> md;
+
+                       if (!md) {
+                               md.reset (new MovingImageDecoder (_film, mc));
+                               md->Video.connect (bind (&Player::process_video, this, piece, _1, _2, _3, _4));
+                       }
+
+                       piece->decoder = md;
+               }
+
                shared_ptr<const SndfileContent> sc = dynamic_pointer_cast<const SndfileContent> (*i);
                if (sc) {
                        shared_ptr<AudioDecoder> sd (new SndfileDecoder (_film, sc));
@@ -485,7 +492,8 @@ Player::content_changed (weak_ptr<Content> w, int property, bool frequent)
        }
 
        if (
-               property == ContentProperty::START || property == ContentProperty::LENGTH ||
+               property == ContentProperty::POSITION || property == ContentProperty::LENGTH ||
+               property == ContentProperty::TRIM_START || property == ContentProperty::TRIM_END ||
                property == VideoContentProperty::VIDEO_CROP || property == VideoContentProperty::VIDEO_RATIO
                ) {
                
@@ -539,9 +547,9 @@ Player::emit_black ()
        _last_video.reset ();
 #endif
        
-       /* XXX: use same here */
-       Video (_black_frame, EYES_BOTH, false, _video_position);
+       Video (_black_frame, EYES_BOTH, _last_emit_was_black, _video_position);
        _video_position += _film->video_frames_to_time (1);
+       _last_emit_was_black = true;
 }
 
 void
@@ -620,6 +628,6 @@ Player::update_subtitle ()
        _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 (libdcp::Size (scaled_size.width, scaled_size.height), Scaler::from_id ("bicubic"), true);
-       _out_subtitle.from = _in_subtitle.from + piece->content->start ();
-       _out_subtitle.to = _in_subtitle.to + piece->content->start ();
+       _out_subtitle.from = _in_subtitle.from + piece->content->position ();
+       _out_subtitle.to = _in_subtitle.to + piece->content->position ();
 }