2 Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 #include "ffmpeg_decoder.h"
24 #include "ffmpeg_content.h"
25 #include "imagemagick_decoder.h"
26 #include "imagemagick_content.h"
27 #include "sndfile_decoder.h"
28 #include "sndfile_content.h"
32 #include "null_content.h"
33 #include "black_decoder.h"
34 #include "silence_decoder.h"
41 using boost::shared_ptr;
42 using boost::weak_ptr;
43 using boost::dynamic_pointer_cast;
47 Piece (shared_ptr<Content> c, shared_ptr<Decoder> d)
52 shared_ptr<Content> content;
53 shared_ptr<Decoder> decoder;
56 Player::Player (shared_ptr<const Film> f, shared_ptr<const Playlist> p)
61 , _have_valid_pieces (false)
63 , _audio_buffers (f->dcp_audio_channels(), 0)
66 _playlist->Changed.connect (bind (&Player::playlist_changed, this));
67 _playlist->ContentChanged.connect (bind (&Player::content_changed, this, _1, _2));
71 Player::disable_video ()
77 Player::disable_audio ()
85 if (!_have_valid_pieces) {
87 _have_valid_pieces = true;
90 /* Here we are just finding the active decoder with the earliest last emission time, then
94 Time earliest_t = TIME_MAX;
95 shared_ptr<Piece> earliest;
97 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
98 cout << "check " << (*i)->content->file()
99 << " start=" << (*i)->content->start()
100 << ", position=" << (*i)->decoder->position()
101 << ", end=" << (*i)->content->end() << "\n";
103 if ((*i)->decoder->done ()) {
107 if (!_audio && dynamic_pointer_cast<AudioDecoder> ((*i)->decoder) && !dynamic_pointer_cast<VideoDecoder> ((*i)->decoder)) {
111 Time const t = (*i)->content->start() + (*i)->decoder->position();
112 if (t < earliest_t) {
113 cout << "\t candidate; " << t << " " << (t / TIME_HZ) << ".\n";
125 cout << "\tpass " << earliest->content->file() << " ";
126 if (dynamic_pointer_cast<FFmpegContent> (earliest->content)) {
127 cout << " FFmpeg.\n";
128 } else if (dynamic_pointer_cast<ImageMagickContent> (earliest->content)) {
129 cout << " ImageMagickContent.\n";
130 } else if (dynamic_pointer_cast<SndfileContent> (earliest->content)) {
131 cout << " SndfileContent.\n";
132 } else if (dynamic_pointer_cast<BlackDecoder> (earliest->decoder)) {
134 } else if (dynamic_pointer_cast<SilenceDecoder> (earliest->decoder)) {
135 cout << " Silence.\n";
138 earliest->decoder->pass ();
139 _position = earliest->content->start() + earliest->decoder->position ();
140 cout << "\tpassed to " << _position << " " << (_position / TIME_HZ) << "\n";
146 Player::process_video (weak_ptr<Content> weak_content, shared_ptr<const Image> image, bool same, Time time)
148 shared_ptr<Content> content = weak_content.lock ();
153 time += content->start ();
155 Video (image, same, time);
159 Player::process_audio (weak_ptr<Content> weak_content, shared_ptr<const AudioBuffers> audio, Time time)
161 shared_ptr<Content> content = weak_content.lock ();
166 /* The time of this audio may indicate that some of our buffered audio is not going to
167 be added to any more, so it can be emitted.
170 time += content->start ();
172 if (time > _next_audio) {
173 /* We can emit some audio from our buffers */
174 OutputAudioFrame const N = _film->time_to_audio_frames (time - _next_audio);
175 assert (N <= _audio_buffers.frames());
176 shared_ptr<AudioBuffers> emit (new AudioBuffers (_audio_buffers.channels(), N));
177 emit->copy_from (&_audio_buffers, N, 0, 0);
178 Audio (emit, _next_audio);
179 _next_audio += _film->audio_frames_to_time (N);
181 /* And remove it from our buffers */
182 if (_audio_buffers.frames() > N) {
183 _audio_buffers.move (N, 0, _audio_buffers.frames() - N);
185 _audio_buffers.set_frames (_audio_buffers.frames() - N);
188 /* Now accumulate the new audio into our buffers */
189 _audio_buffers.ensure_size (_audio_buffers.frames() + audio->frames());
190 _audio_buffers.accumulate_frames (audio.get(), 0, 0, audio->frames ());
191 _audio_buffers.set_frames (_audio_buffers.frames() + audio->frames());
197 if (_audio_buffers.frames() > 0) {
198 shared_ptr<AudioBuffers> emit (new AudioBuffers (_audio_buffers.channels(), _audio_buffers.frames()));
199 emit->copy_from (&_audio_buffers, _audio_buffers.frames(), 0, 0);
200 Audio (emit, _next_audio);
201 _next_audio += _film->audio_frames_to_time (_audio_buffers.frames ());
202 _audio_buffers.set_frames (0);
206 /** @return true on error */
208 Player::seek (Time t)
210 if (!_have_valid_pieces) {
212 _have_valid_pieces = true;
215 if (_pieces.empty ()) {
219 // cout << "seek to " << t << " " << (t / TIME_HZ) << "\n";
221 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
222 Time s = t - (*i)->content->start ();
223 s = max (static_cast<Time> (0), s);
224 s = min ((*i)->content->length(), s);
225 // cout << "seek [" << (*i)->content->file() << "," << (*i)->content->start() << "," << (*i)->content->end() << "] to " << s << "\n";
226 (*i)->decoder->seek (s);
229 /* XXX: don't seek audio because we don't need to... */
240 Player::seek_forward ()
246 Player::add_black_piece (Time s, Time len)
248 shared_ptr<NullContent> nc (new NullContent (_film, s, len));
249 nc->set_ratio (_film->container ());
250 shared_ptr<BlackDecoder> bd (new BlackDecoder (_film, nc));
251 bd->Video.connect (bind (&Player::process_video, this, nc, _1, _2, _3));
252 _pieces.push_back (shared_ptr<Piece> (new Piece (nc, bd)));
253 cout << "\tblack @ " << s << " -- " << (s + len) << "\n";
257 Player::add_silent_piece (Time s, Time len)
259 shared_ptr<NullContent> nc (new NullContent (_film, s, len));
260 shared_ptr<SilenceDecoder> sd (new SilenceDecoder (_film, nc));
261 sd->Audio.connect (bind (&Player::process_audio, this, nc, _1, _2));
262 _pieces.push_back (shared_ptr<Piece> (new Piece (nc, sd)));
263 cout << "\tsilence @ " << s << " -- " << (s + len) << "\n";
268 Player::setup_pieces ()
270 cout << "----- Player SETUP PIECES.\n";
272 list<shared_ptr<Piece> > old_pieces = _pieces;
276 Playlist::ContentList content = _playlist->content ();
277 sort (content.begin(), content.end(), ContentSorter ());
279 for (Playlist::ContentList::iterator i = content.begin(); i != content.end(); ++i) {
281 shared_ptr<Decoder> decoder;
283 /* XXX: into content? */
285 shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<const FFmpegContent> (*i);
287 shared_ptr<FFmpegDecoder> fd (new FFmpegDecoder (_film, fc, _video, _audio));
289 fd->Video.connect (bind (&Player::process_video, this, *i, _1, _2, _3));
290 fd->Audio.connect (bind (&Player::process_audio, this, *i, _1, _2));
291 if (_video_container_size) {
292 fd->set_video_container_size (_video_container_size.get ());
296 cout << "\tFFmpeg @ " << fc->start() << " -- " << fc->end() << "\n";
299 shared_ptr<const ImageMagickContent> ic = dynamic_pointer_cast<const ImageMagickContent> (*i);
301 shared_ptr<ImageMagickDecoder> id;
303 /* See if we can re-use an old ImageMagickDecoder */
304 for (list<shared_ptr<Piece> >::const_iterator j = old_pieces.begin(); j != old_pieces.end(); ++j) {
305 shared_ptr<ImageMagickDecoder> imd = dynamic_pointer_cast<ImageMagickDecoder> ((*j)->decoder);
306 if (imd && imd->content() == ic) {
312 id.reset (new ImageMagickDecoder (_film, ic));
313 id->Video.connect (bind (&Player::process_video, this, *i, _1, _2, _3));
314 if (_video_container_size) {
315 id->set_video_container_size (_video_container_size.get ());
320 cout << "\tImageMagick @ " << ic->start() << " -- " << ic->end() << "\n";
323 shared_ptr<const SndfileContent> sc = dynamic_pointer_cast<const SndfileContent> (*i);
325 shared_ptr<AudioDecoder> sd (new SndfileDecoder (_film, sc));
326 sd->Audio.connect (bind (&Player::process_audio, this, *i, _1, _2));
329 cout << "\tSndfile @ " << sc->start() << " -- " << sc->end() << "\n";
332 _pieces.push_back (shared_ptr<Piece> (new Piece (*i, decoder)));
335 /* Fill in visual gaps with black and audio gaps with silence */
339 list<shared_ptr<Piece> > pieces_copy = _pieces;
340 for (list<shared_ptr<Piece> >::iterator i = pieces_copy.begin(); i != pieces_copy.end(); ++i) {
341 if (dynamic_pointer_cast<VideoContent> ((*i)->content)) {
342 Time const diff = (*i)->content->start() - video_pos;
344 add_black_piece (video_pos, diff);
346 video_pos = (*i)->content->end();
349 shared_ptr<AudioContent> ac = dynamic_pointer_cast<AudioContent> ((*i)->content);
350 if (ac && ac->audio_channels()) {
351 Time const diff = (*i)->content->start() - audio_pos;
353 add_silent_piece (video_pos, diff);
355 audio_pos = (*i)->content->end();
359 if (video_pos < audio_pos) {
360 add_black_piece (video_pos, audio_pos - video_pos);
361 } else if (audio_pos < video_pos) {
362 add_silent_piece (audio_pos, video_pos - audio_pos);
367 Player::content_changed (weak_ptr<Content> w, int p)
369 shared_ptr<Content> c = w.lock ();
374 if (p == ContentProperty::START || p == ContentProperty::LENGTH) {
375 _have_valid_pieces = false;
380 Player::playlist_changed ()
382 _have_valid_pieces = false;
386 Player::set_video_container_size (libdcp::Size s)
388 _video_container_size = s;
389 for (list<shared_ptr<Piece> >::iterator i = _pieces.begin(); i != _pieces.end(); ++i) {
390 shared_ptr<VideoDecoder> vd = dynamic_pointer_cast<VideoDecoder> ((*i)->decoder);
392 vd->set_video_container_size (s);