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diff --git a/src/lib/player.cc b/src/lib/player.cc
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+++ b/src/lib/player.cc
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+/*
+ Copyright (C) 2013 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
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include "player.h"
+#include "film.h"
+#include "ffmpeg_decoder.h"
+#include "ffmpeg_content.h"
+#include "imagemagick_decoder.h"
+#include "imagemagick_content.h"
+#include "sndfile_decoder.h"
+#include "sndfile_content.h"
+#include "playlist.h"
+#include "job.h"
+#include "image.h"
+#include "null_content.h"
+#include "black_decoder.h"
+#include "silence_decoder.h"
+
+using std::list;
+using std::cout;
+using std::min;
+using std::max;
+using std::vector;
+using boost::shared_ptr;
+using boost::weak_ptr;
+using boost::dynamic_pointer_cast;
+
+struct Piece
+{
+ Piece (shared_ptr<Content> c, shared_ptr<Decoder> d)
+ : content (c)
+ , decoder (d)
+ {}
+
+ shared_ptr<Content> content;
+ shared_ptr<Decoder> decoder;
+};
+
+Player::Player (shared_ptr<const Film> f, shared_ptr<const Playlist> p)
+ : _film (f)
+ , _playlist (p)
+ , _video (true)
+ , _audio (true)
+ , _subtitles (true)
+ , _have_valid_pieces (false)
+ , _position (0)
+ , _audio_buffers (f->dcp_audio_channels(), 0)
+ , _next_audio (0)
+{
+ _playlist->Changed.connect (bind (&Player::playlist_changed, this));
+ _playlist->ContentChanged.connect (bind (&Player::content_changed, this, _1, _2));
+}
+
+void
+Player::disable_video ()
+{
+ _video = false;
+}
+
+void
+Player::disable_audio ()
+{
+ _audio = false;
+}
+
+void
+Player::disable_subtitles ()
+{
+ _subtitles = false;
+}
+
+bool
+Player::pass ()
+{
+ if (!_have_valid_pieces) {
+ setup_pieces ();
+ _have_valid_pieces = true;
+ }
+
+ /* Here we are just finding the active decoder with the earliest last emission time, then
+ calling pass on it.
+ */
+
+ Time earliest_t = TIME_MAX;
+ shared_ptr<Piece> earliest;
+
+ for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
+ cout << "check " << (*i)->content->file()
+ << " start=" << (*i)->content->start()
+ << ", next=" << (*i)->decoder->next()
+ << ", end=" << (*i)->content->end() << "\n";
+
+ if ((*i)->decoder->done ()) {
+ continue;
+ }
+
+ if (!_audio && dynamic_pointer_cast<AudioDecoder> ((*i)->decoder) && !dynamic_pointer_cast<VideoDecoder> ((*i)->decoder)) {
+ continue;
+ }
+
+ Time const t = (*i)->content->start() + (*i)->decoder->next();
+ if (t < earliest_t) {
+ cout << "\t candidate; " << t << " " << (t / TIME_HZ) << ".\n";
+ earliest_t = t;
+ earliest = *i;
+ }
+ }
+
+ if (!earliest) {
+ flush ();
+ return true;
+ }
+
+ cout << "PASS:\n";
+ cout << "\tpass " << earliest->content->file() << " ";
+ if (dynamic_pointer_cast<FFmpegContent> (earliest->content)) {
+ cout << " FFmpeg.\n";
+ } else if (dynamic_pointer_cast<ImageMagickContent> (earliest->content)) {
+ cout << " ImageMagickContent.\n";
+ } else if (dynamic_pointer_cast<SndfileContent> (earliest->content)) {
+ cout << " SndfileContent.\n";
+ } else if (dynamic_pointer_cast<BlackDecoder> (earliest->decoder)) {
+ cout << " Black.\n";
+ } else if (dynamic_pointer_cast<SilenceDecoder> (earliest->decoder)) {
+ cout << " Silence.\n";
+ }
+
+ earliest->decoder->pass ();
+ _position = earliest->content->start() + earliest->decoder->next ();
+ cout << "\tpassed to " << _position << " " << (_position / TIME_HZ) << "\n";
+
+ return false;
+}
+
+void
+Player::process_video (weak_ptr<Content> weak_content, shared_ptr<const Image> image, bool same, Time time)
+{
+ shared_ptr<Content> content = weak_content.lock ();
+ if (!content) {
+ return;
+ }
+
+ time += content->start ();
+
+ Video (image, same, time);
+}
+
+void
+Player::process_audio (weak_ptr<Content> weak_content, shared_ptr<const AudioBuffers> audio, Time time)
+{
+ shared_ptr<Content> content = weak_content.lock ();
+ if (!content) {
+ return;
+ }
+
+ /* 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.
+ */
+
+ time += content->start ();
+
+ if (time > _next_audio) {
+ /* We can emit some audio from our buffers */
+ OutputAudioFrame const N = _film->time_to_audio_frames (time - _next_audio);
+ 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, _next_audio);
+ _next_audio += _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());
+}
+
+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, _next_audio);
+ _next_audio += _film->audio_frames_to_time (_audio_buffers.frames ());
+ _audio_buffers.set_frames (0);
+ }
+}
+
+/** @return true on error */
+void
+Player::seek (Time t)
+{
+ if (!_have_valid_pieces) {
+ setup_pieces ();
+ _have_valid_pieces = true;
+ }
+
+ if (_pieces.empty ()) {
+ return;
+ }
+
+// cout << "seek to " << t << " " << (t / TIME_HZ) << "\n";
+
+ for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
+ Time s = t - (*i)->content->start ();
+ s = max (static_cast<Time> (0), s);
+ s = min ((*i)->content->length(), s);
+// cout << "seek [" << (*i)->content->file() << "," << (*i)->content->start() << "," << (*i)->content->end() << "] to " << s << "\n";
+ (*i)->decoder->seek (s);
+ }
+
+ /* XXX: don't seek audio because we don't need to... */
+}
+
+
+void
+Player::seek_back ()
+{
+
+}
+
+void
+Player::seek_forward ()
+{
+
+}
+
+void
+Player::add_black_piece (Time s, Time len)
+{
+ shared_ptr<NullContent> nc (new NullContent (_film, s, len));
+ nc->set_ratio (_film->container ());
+ shared_ptr<BlackDecoder> bd (new BlackDecoder (_film, nc));
+ bd->Video.connect (bind (&Player::process_video, this, nc, _1, _2, _3));
+ _pieces.push_back (shared_ptr<Piece> (new Piece (nc, bd)));
+ cout << "\tblack @ " << s << " -- " << (s + len) << "\n";
+}
+
+void
+Player::add_silent_piece (Time s, Time len)
+{
+ shared_ptr<NullContent> nc (new NullContent (_film, s, len));
+ shared_ptr<SilenceDecoder> sd (new SilenceDecoder (_film, nc));
+ sd->Audio.connect (bind (&Player::process_audio, this, nc, _1, _2));
+ _pieces.push_back (shared_ptr<Piece> (new Piece (nc, sd)));
+ cout << "\tsilence @ " << s << " -- " << (s + len) << "\n";
+}
+
+
+void
+Player::setup_pieces ()
+{
+ cout << "----- Player SETUP PIECES.\n";
+
+ list<shared_ptr<Piece> > old_pieces = _pieces;
+
+ _pieces.clear ();
+
+ Playlist::ContentList content = _playlist->content ();
+ sort (content.begin(), content.end(), ContentSorter ());
+
+ for (Playlist::ContentList::iterator i = content.begin(); i != content.end(); ++i) {
+
+ shared_ptr<Decoder> decoder;
+
+ /* XXX: into content? */
+
+ shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<const FFmpegContent> (*i);
+ if (fc) {
+ shared_ptr<FFmpegDecoder> fd (new FFmpegDecoder (_film, fc, _video, _audio, _subtitles));
+
+ fd->Video.connect (bind (&Player::process_video, this, *i, _1, _2, _3));
+ fd->Audio.connect (bind (&Player::process_audio, this, *i, _1, _2));
+
+ decoder = fd;
+ cout << "\tFFmpeg @ " << fc->start() << " -- " << fc->end() << "\n";
+ }
+
+ shared_ptr<const ImageMagickContent> ic = dynamic_pointer_cast<const ImageMagickContent> (*i);
+ if (ic) {
+ shared_ptr<ImageMagickDecoder> id;
+
+ /* See if we can re-use an old ImageMagickDecoder */
+ for (list<shared_ptr<Piece> >::const_iterator j = old_pieces.begin(); j != old_pieces.end(); ++j) {
+ shared_ptr<ImageMagickDecoder> imd = dynamic_pointer_cast<ImageMagickDecoder> ((*j)->decoder);
+ if (imd && imd->content() == ic) {
+ id = imd;
+ }
+ }
+
+ if (!id) {
+ id.reset (new ImageMagickDecoder (_film, ic));
+ id->Video.connect (bind (&Player::process_video, this, *i, _1, _2, _3));
+ }
+
+ decoder = id;
+ cout << "\tImageMagick @ " << ic->start() << " -- " << ic->end() << "\n";
+ }
+
+ 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, *i, _1, _2));
+
+ decoder = sd;
+ cout << "\tSndfile @ " << sc->start() << " -- " << sc->end() << "\n";
+ }
+
+ _pieces.push_back (shared_ptr<Piece> (new Piece (*i, decoder)));
+ }
+
+ /* Fill in visual gaps with black and audio gaps with silence */
+
+ Time video_pos = 0;
+ Time audio_pos = 0;
+ list<shared_ptr<Piece> > pieces_copy = _pieces;
+ for (list<shared_ptr<Piece> >::iterator i = pieces_copy.begin(); i != pieces_copy.end(); ++i) {
+ if (dynamic_pointer_cast<VideoContent> ((*i)->content)) {
+ Time const diff = (*i)->content->start() - video_pos;
+ if (diff > 0) {
+ add_black_piece (video_pos, diff);
+ }
+ video_pos = (*i)->content->end();
+ }
+
+ shared_ptr<AudioContent> ac = dynamic_pointer_cast<AudioContent> ((*i)->content);
+ if (ac && ac->audio_channels()) {
+ Time const diff = (*i)->content->start() - audio_pos;
+ if (diff > 0) {
+ add_silent_piece (video_pos, diff);
+ }
+ audio_pos = (*i)->content->end();
+ }
+ }
+
+ if (video_pos < audio_pos) {
+ add_black_piece (video_pos, audio_pos - video_pos);
+ } else if (audio_pos < video_pos) {
+ add_silent_piece (audio_pos, video_pos - audio_pos);
+ }
+}
+
+void
+Player::content_changed (weak_ptr<Content> w, int p)
+{
+ shared_ptr<Content> c = w.lock ();
+ if (!c) {
+ return;
+ }
+
+ if (p == ContentProperty::START || p == ContentProperty::LENGTH) {
+ _have_valid_pieces = false;
+ }
+}
+
+void
+Player::playlist_changed ()
+{
+ _have_valid_pieces = false;
+}
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