src/lib/player.cc

   1 /*
   2     Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
   3
   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.
   8
   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.
  13
  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.
  17
  18 */
  19
  20 #include "player.h"
  21 #include "film.h"
  22 #include "ffmpeg_decoder.h"
  23 #include "imagemagick_decoder.h"
  24 #include "sndfile_decoder.h"
  25 #include "sndfile_content.h"
  26 #include "playlist.h"
  27 #include "job.h"
  28
  29 using std::list;
  30 using std::cout;
  31 using boost::shared_ptr;
  32 using boost::weak_ptr;
  33 using boost::dynamic_pointer_cast;
  34
  35 Player::Player (shared_ptr<const Film> f, shared_ptr<const Playlist> p)
  36         : _film (f)
  37         , _playlist (p)
  38         , _video (true)
  39         , _audio (true)
  40         , _subtitles (true)
  41         , _have_valid_decoders (false)
  42         , _ffmpeg_decoder_done (false)
  43         , _video_sync (true)
  44 {
  45         _playlist->Changed.connect (bind (&Player::playlist_changed, this));
  46         _playlist->ContentChanged.connect (bind (&Player::content_changed, this, _1, _2));
  47 }
  48
  49 void
  50 Player::disable_video ()
  51 {
  52         _video = false;
  53 }
  54
  55 void
  56 Player::disable_audio ()
  57 {
  58         _audio = false;
  59 }
  60
  61 void
  62 Player::disable_subtitles ()
  63 {
  64         _subtitles = false;
  65 }
  66
  67 bool
  68 Player::pass ()
  69 {
  70         if (!_have_valid_decoders) {
  71                 setup_decoders ();
  72                 _have_valid_decoders = true;
  73         }
  74
  75         bool done = true;
  76
  77         if (_playlist->video_from() == Playlist::VIDEO_FFMPEG || _playlist->audio_from() == Playlist::AUDIO_FFMPEG) {
  78                 if (!_ffmpeg_decoder_done) {
  79                         if (_ffmpeg_decoder->pass ()) {
  80                                 _ffmpeg_decoder_done = true;
  81                         } else {
  82                                 done = false;
  83                         }
  84                 }
  85         }
  86
  87         if (_playlist->video_from() == Playlist::VIDEO_IMAGEMAGICK) {
  88                 if (_imagemagick_decoder != _imagemagick_decoders.end ()) {
  89                         if ((*_imagemagick_decoder)->pass ()) {
  90                                 _imagemagick_decoder++;
  91                         }
  92
  93                         if (_imagemagick_decoder != _imagemagick_decoders.end ()) {
  94                                 done = false;
  95                         }
  96                 }
  97         }
  98
  99         if (_playlist->audio_from() == Playlist::AUDIO_SNDFILE) {
 100                 for (list<shared_ptr<SndfileDecoder> >::iterator i = _sndfile_decoders.begin(); i != _sndfile_decoders.end(); ++i) {
 101                         if (!(*i)->pass ()) {
 102                                 done = false;
 103                         }
 104                 }
 105
 106                 Audio (_sndfile_buffers);
 107                 _sndfile_buffers.reset ();
 108         }
 109
 110         return done;
 111 }
 112
 113 void
 114 Player::set_progress (shared_ptr<Job> job)
 115 {
 116         /* Assume progress can be divined from how far through the video we are */
 117         switch (_playlist->video_from ()) {
 118         case Playlist::VIDEO_NONE:
 119                 break;
 120         case Playlist::VIDEO_FFMPEG:
 121                 if (_playlist->video_length ()) {
 122                         job->set_progress (float(_ffmpeg_decoder->video_frame()) / _playlist->video_length ());
 123                 }
 124                 break;
 125         case Playlist::VIDEO_IMAGEMAGICK:
 126         {
 127                 int n = 0;
 128                 for (list<shared_ptr<ImageMagickDecoder> >::iterator i = _imagemagick_decoders.begin(); i != _imagemagick_decoders.end(); ++i) {
 129                         if (_imagemagick_decoder == i) {
 130                                 job->set_progress (float (n) / _imagemagick_decoders.size ());
 131                         }
 132                         ++n;
 133                 }
 134                 break;
 135         }
 136         }
 137 }
 138
 139 void
 140 Player::process_video (shared_ptr<Image> i, bool same, shared_ptr<Subtitle> s)
 141 {
 142         Video (i, same, s);
 143 }
 144
 145 void
 146 Player::process_audio (weak_ptr<const AudioContent> c, shared_ptr<AudioBuffers> b)
 147 {
 148         if (_playlist->audio_from() == Playlist::AUDIO_SNDFILE) {
 149                 AudioMapping mapping = _film->audio_mapping ();
 150                 if (!_sndfile_buffers) {
 151                         _sndfile_buffers.reset (new AudioBuffers (mapping.dcp_channels(), b->frames ()));
 152                         _sndfile_buffers->make_silent ();
 153                 }
 154
 155                 for (int i = 0; i < b->channels(); ++i) {
 156                         list<libdcp::Channel> dcp = mapping.content_to_dcp (AudioMapping::Channel (c, i));
 157                         for (list<libdcp::Channel>::iterator j = dcp.begin(); j != dcp.end(); ++j) {
 158                                 _sndfile_buffers->accumulate (b, i, static_cast<int> (*j));
 159                         }
 160                 }
 161
 162         } else {
 163                 Audio (b);
 164         }
 165 }
 166
 167 /** @return true on error */
 168 bool
 169 Player::seek (double t)
 170 {
 171         if (!_have_valid_decoders) {
 172                 setup_decoders ();
 173                 _have_valid_decoders = true;
 174         }
 175
 176         bool r = false;
 177
 178         switch (_playlist->video_from()) {
 179         case Playlist::VIDEO_NONE:
 180                 break;
 181         case Playlist::VIDEO_FFMPEG:
 182                 if (!_ffmpeg_decoder || _ffmpeg_decoder->seek (t)) {
 183                         r = true;
 184                 }
 185                 /* We're seeking, so all `all done' bets are off */
 186                 _ffmpeg_decoder_done = false;
 187                 break;
 188         case Playlist::VIDEO_IMAGEMAGICK:
 189                 /* Find the decoder that contains this position */
 190                 _imagemagick_decoder = _imagemagick_decoders.begin ();
 191                 while (_imagemagick_decoder != _imagemagick_decoders.end ()) {
 192                         double const this_length = (*_imagemagick_decoder)->video_length() / _film->video_frame_rate ();
 193                         if (t < this_length) {
 194                                 break;
 195                         }
 196                         t -= this_length;
 197                         ++_imagemagick_decoder;
 198                 }
 199
 200                 if (_imagemagick_decoder != _imagemagick_decoders.end()) {
 201                         (*_imagemagick_decoder)->seek (t);
 202                 } else {
 203                         r = true;
 204                 }
 205                 break;
 206         }
 207
 208         /* XXX: don't seek audio because we don't need to... */
 209
 210         return r;
 211 }
 212
 213 bool
 214 Player::seek_to_last ()
 215 {
 216         if (!_have_valid_decoders) {
 217                 setup_decoders ();
 218                 _have_valid_decoders = true;
 219         }
 220
 221         bool r = false;
 222
 223         switch (_playlist->video_from ()) {
 224         case Playlist::VIDEO_NONE:
 225                 break;
 226         case Playlist::VIDEO_FFMPEG:
 227                 if (!_ffmpeg_decoder || _ffmpeg_decoder->seek_to_last ()) {
 228                         r = true;
 229                 }
 230
 231                 /* We're seeking, so all `all done' bets are off */
 232                 _ffmpeg_decoder_done = false;
 233                 break;
 234         case Playlist::VIDEO_IMAGEMAGICK:
 235                 if ((*_imagemagick_decoder)->seek_to_last ()) {
 236                         r = true;
 237                 }
 238                 break;
 239         }
 240
 241         /* XXX: don't seek audio because we don't need to... */
 242
 243         return r;
 244 }
 245
 246 void
 247 Player::setup_decoders ()
 248 {
 249         if ((_video && _playlist->video_from() == Playlist::VIDEO_FFMPEG) || (_audio && _playlist->audio_from() == Playlist::AUDIO_FFMPEG)) {
 250                 _ffmpeg_decoder.reset (
 251                         new FFmpegDecoder (
 252                                 _film,
 253                                 _playlist->ffmpeg(),
 254                                 _video && _playlist->video_from() == Playlist::VIDEO_FFMPEG,
 255                                 _audio && _playlist->audio_from() == Playlist::AUDIO_FFMPEG,
 256                                 _subtitles && _film->with_subtitles(),
 257                                 _video_sync
 258                                 )
 259                         );
 260         }
 261
 262         if (_video && _playlist->video_from() == Playlist::VIDEO_FFMPEG) {
 263                 _ffmpeg_decoder->connect_video (shared_from_this ());
 264         }
 265
 266         if (_audio && _playlist->audio_from() == Playlist::AUDIO_FFMPEG) {
 267                 _ffmpeg_decoder->Audio.connect (bind (&Player::process_audio, this, _playlist->ffmpeg (), _1));
 268         }
 269
 270         if (_video && _playlist->video_from() == Playlist::VIDEO_IMAGEMAGICK) {
 271                 list<shared_ptr<const ImageMagickContent> > ic = _playlist->imagemagick ();
 272                 for (list<shared_ptr<const ImageMagickContent> >::iterator i = ic.begin(); i != ic.end(); ++i) {
 273                         shared_ptr<ImageMagickDecoder> d (new ImageMagickDecoder (_film, *i));
 274                         _imagemagick_decoders.push_back (d);
 275                         d->connect_video (shared_from_this ());
 276                 }
 277
 278                 _imagemagick_decoder = _imagemagick_decoders.begin ();
 279         }
 280
 281         if (_audio && _playlist->audio_from() == Playlist::AUDIO_SNDFILE) {
 282                 list<shared_ptr<const SndfileContent> > sc = _playlist->sndfile ();
 283                 for (list<shared_ptr<const SndfileContent> >::iterator i = sc.begin(); i != sc.end(); ++i) {
 284                         shared_ptr<SndfileDecoder> d (new SndfileDecoder (_film, *i));
 285                         _sndfile_decoders.push_back (d);
 286                         d->Audio.connect (bind (&Player::process_audio, this, *i, _1));
 287                 }
 288         }
 289 }
 290
 291 void
 292 Player::disable_video_sync ()
 293 {
 294         _video_sync = false;
 295 }
 296
 297 double
 298 Player::last_video_time () const
 299 {
 300         switch (_playlist->video_from ()) {
 301         case Playlist::VIDEO_NONE:
 302                 return 0;
 303         case Playlist::VIDEO_FFMPEG:
 304                 return _ffmpeg_decoder->last_source_time ();
 305         case Playlist::VIDEO_IMAGEMAGICK:
 306         {
 307                 double t = 0;
 308                 for (list<shared_ptr<ImageMagickDecoder> >::const_iterator i = _imagemagick_decoders.begin(); i != _imagemagick_decoder; ++i) {
 309                         t += (*i)->video_length() / (*i)->video_frame_rate ();
 310                 }
 311
 312                 return t + (*_imagemagick_decoder)->last_source_time ();
 313         }
 314         }
 315
 316         return 0;
 317 }
 318
 319 void
 320 Player::content_changed (weak_ptr<Content> w, int p)
 321 {
 322         shared_ptr<Content> c = w.lock ();
 323         if (!c) {
 324                 return;
 325         }
 326
 327         if (p == VideoContentProperty::VIDEO_LENGTH) {
 328                 if (dynamic_pointer_cast<FFmpegContent> (c)) {
 329                         _have_valid_decoders = false;
 330                 }
 331         }
 332 }
 333
 334 void
 335 Player::playlist_changed ()
 336 {
 337         _have_valid_decoders = false;
 338 }