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