git.sesse.net Git - mlt/blob - src/modules/core/consumer_multi.c

   1 /*
   2  * Copyright (C) 2011 Ushodaya Enterprises Limited
   3  * Author: Dan Dennedy <dan@dennedy.org>
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 #include <framework/mlt.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <pthread.h>
  25 #include <sys/time.h>
  26
  27 // Forward references
  28 static int start( mlt_consumer consumer );
  29 static int stop( mlt_consumer consumer );
  30 static int is_stopped( mlt_consumer consumer );
  31 static void *consumer_thread( void *arg );
  32 static void consumer_close( mlt_consumer consumer );
  33
  34 static mlt_properties normalisers = NULL;
  35
  36 /** Initialise the consumer.
  37 */
  38
  39 mlt_consumer consumer_multi_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  40 {
  41         mlt_consumer consumer = mlt_consumer_new( profile );
  42
  43         if ( consumer )
  44         {
  45                 mlt_properties properties = MLT_CONSUMER_PROPERTIES(consumer);
  46
  47                 // Set defaults
  48                 mlt_properties_set( properties, "resource", arg );
  49                 mlt_properties_set_int( properties, "real_time", -1 );
  50                 mlt_properties_set_int( properties, "terminate_on_pause", 1 );
  51
  52                 // Init state
  53                 mlt_properties_set_int( properties, "joined", 1 );
  54
  55                 // Assign callbacks
  56                 consumer->close = consumer_close;
  57                 consumer->start = start;
  58                 consumer->stop = stop;
  59                 consumer->is_stopped = is_stopped;
  60         }
  61
  62         return consumer;
  63 }
  64
  65 static mlt_consumer create_consumer( mlt_profile profile, char *id, char *arg )
  66 {
  67         char *myid = id ? strdup( id ) : NULL;
  68         char *myarg = ( myid && !arg ) ? strchr( myid, ':' ) : NULL;
  69         if ( myarg )
  70                 *myarg ++ = '\0';
  71         else
  72                 myarg = arg;
  73         mlt_consumer consumer = mlt_factory_consumer( profile, myid, myarg );
  74         if ( myid )
  75                 free( myid );
  76         return consumer;
  77 }
  78
  79 static void create_filter( mlt_profile profile, mlt_service service, char *effect, int *created )
  80 {
  81         char *id = strdup( effect );
  82         char *arg = strchr( id, ':' );
  83         if ( arg != NULL )
  84                 *arg ++ = '\0';
  85
  86         // The swscale and avcolor_space filters require resolution as arg to test compatibility
  87         if ( strncmp( effect, "swscale", 7 ) == 0 || strncmp( effect, "avcolo", 6 ) == 0 )
  88                 arg = (char*) mlt_properties_get_int( MLT_SERVICE_PROPERTIES( service ), "meta.media.width" );
  89
  90         mlt_filter filter = mlt_factory_filter( profile, id, arg );
  91         if ( filter != NULL )
  92         {
  93                 mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "_loader", 1 );
  94                 mlt_service_attach( service, filter );
  95                 mlt_filter_close( filter );
  96                 *created = 1;
  97         }
  98         free( id );
  99 }
 100
 101 static void attach_normalisers( mlt_profile profile, mlt_service service )
 102 {
 103         // Loop variable
 104         int i;
 105
 106         // Tokeniser
 107         mlt_tokeniser tokeniser = mlt_tokeniser_init( );
 108
 109         // We only need to load the normalising properties once
 110         if ( normalisers == NULL )
 111         {
 112                 char temp[ 1024 ];
 113                 snprintf( temp, sizeof(temp), "%s/core/loader.ini", mlt_environment( "MLT_DATA" ) );
 114                 normalisers = mlt_properties_load( temp );
 115                 mlt_factory_register_for_clean_up( normalisers, ( mlt_destructor )mlt_properties_close );
 116         }
 117
 118         // Apply normalisers
 119         for ( i = 0; i < mlt_properties_count( normalisers ); i ++ )
 120         {
 121                 int j = 0;
 122                 int created = 0;
 123                 char *value = mlt_properties_get_value( normalisers, i );
 124                 mlt_tokeniser_parse_new( tokeniser, value, "," );
 125                 for ( j = 0; !created && j < mlt_tokeniser_count( tokeniser ); j ++ )
 126                         create_filter( profile, service, mlt_tokeniser_get_string( tokeniser, j ), &created );
 127         }
 128
 129         // Close the tokeniser
 130         mlt_tokeniser_close( tokeniser );
 131
 132         // Attach the audio and video format converters
 133         int created = 0;
 134         create_filter( profile, service, "avcolor_space", &created );
 135         if ( !created )
 136                 create_filter( profile, service, "imageconvert", &created );
 137         create_filter( profile, service, "audioconvert", &created );
 138 }
 139
 140 static mlt_consumer generate_consumer( mlt_consumer consumer, mlt_properties props, int index )
 141 {
 142         mlt_profile profile = NULL;
 143         if ( mlt_properties_get( props, "mlt_profile" ) )
 144                 profile = mlt_profile_init( mlt_properties_get( props, "mlt_profile" ) );
 145         if ( !profile )
 146                 profile = mlt_profile_clone( mlt_service_profile( MLT_CONSUMER_SERVICE(consumer) ) );
 147         mlt_consumer nested = create_consumer( profile, mlt_properties_get( props, "mlt_service" ),
 148                 mlt_properties_get( props, "target" ) );
 149
 150         if ( nested )
 151         {
 152                 mlt_properties properties = MLT_CONSUMER_PROPERTIES(consumer);
 153                 mlt_properties nested_props = MLT_CONSUMER_PROPERTIES(nested);
 154                 char key[30];
 155
 156                 snprintf( key, sizeof(key), "%d.consumer", index );
 157                 mlt_properties_set_data( properties, key, nested, 0, (mlt_destructor) mlt_consumer_close, NULL );
 158                 snprintf( key, sizeof(key), "%d.profile", index );
 159                 mlt_properties_set_data( properties, key, profile, 0, (mlt_destructor) mlt_profile_close, NULL );
 160
 161                 mlt_properties_set_int( nested_props, "put_mode", 1 );
 162                 mlt_properties_pass_list( nested_props, properties, "terminate_on_pause" );
 163                 mlt_properties_set( props, "consumer", NULL );
 164                 // set mlt_profile before other properties to facilitate presets
 165                 mlt_properties_pass_list( nested_props, props, "mlt_profile" );
 166                 mlt_properties_inherit( nested_props, props );
 167
 168                 attach_normalisers( profile, MLT_CONSUMER_SERVICE(nested) );
 169         }
 170         else
 171         {
 172                 mlt_profile_close( profile );
 173         }
 174         return nested;
 175 }
 176
 177 static void foreach_consumer_init( mlt_consumer consumer )
 178 {
 179         const char *resource = mlt_properties_get( MLT_CONSUMER_PROPERTIES(consumer), "resource" );
 180         mlt_properties properties = mlt_properties_parse_yaml( resource );
 181         char key[20];
 182         int index = 0;
 183
 184         if ( mlt_properties_get_data( MLT_CONSUMER_PROPERTIES(consumer), "0", NULL ) )
 185         {
 186                 // Properties set directly by application
 187                 mlt_properties p;
 188
 189                 if ( properties )
 190                         mlt_properties_close( properties );
 191                 properties = MLT_CONSUMER_PROPERTIES(consumer);
 192                 do {
 193                         snprintf( key, sizeof(key), "%d", index );
 194                         if ( ( p = mlt_properties_get_data( properties, key, NULL ) ) )
 195                                 generate_consumer( consumer, p, index++ );
 196                 } while ( p );
 197         }
 198         else if ( properties && mlt_properties_get_data( properties, "0", NULL ) )
 199         {
 200                 // YAML file supplied
 201                 mlt_properties p;
 202
 203                 do {
 204                         snprintf( key, sizeof(key), "%d", index );
 205                         if ( ( p = mlt_properties_get_data( properties, key, NULL ) ) )
 206                                 generate_consumer( consumer, p, index++ );
 207                 } while ( p );
 208                 mlt_properties_close( properties );
 209         }
 210         else
 211         {
 212                 // properties file supplied or properties on this consumer
 213                 const char *s;
 214
 215                 if ( properties )
 216                         mlt_properties_close( properties );
 217                 if ( resource )
 218                         properties = mlt_properties_load( resource );
 219                 else
 220                         properties = MLT_CONSUMER_PROPERTIES( consumer );
 221
 222                 do {
 223                         snprintf( key, sizeof(key), "%d", index );
 224                         if ( ( s = mlt_properties_get( properties, key ) ) )
 225                         {
 226                                 mlt_properties p = mlt_properties_new();
 227                                 int i, count;
 228
 229                                 if ( !p ) break;
 230                                 mlt_properties_set( p, "mlt_service", mlt_properties_get( properties, key ) );
 231                                 snprintf( key, sizeof(key), "%d.", index );
 232
 233                                 count = mlt_properties_count( properties );
 234                                 for ( i = 0; i < count; i++ )
 235                                 {
 236                                         char *name = mlt_properties_get_name( properties, i );
 237                                         if ( !strncmp( name, key, strlen(key) ) )
 238                                                 mlt_properties_set( p, name + strlen(key),
 239                                                         mlt_properties_get_value( properties, i ) );
 240                                 }
 241                                 generate_consumer( consumer, p, index++ );
 242                                 mlt_properties_close( p );
 243                         }
 244                 } while ( s );
 245                 if ( resource )
 246                         mlt_properties_close( properties );
 247         }
 248 }
 249
 250 static void foreach_consumer_start( mlt_consumer consumer )
 251 {
 252         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 253         mlt_consumer nested = NULL;
 254         char key[30];
 255         int index = 0;
 256
 257         do {
 258                 snprintf( key, sizeof(key), "%d.consumer", index++ );
 259                 nested = mlt_properties_get_data( properties, key, NULL );
 260                 if ( nested )
 261                 {
 262                         mlt_properties nested_props = MLT_CONSUMER_PROPERTIES(nested);
 263                         mlt_properties_set_position( nested_props, "_multi_position", 0 );
 264                         mlt_properties_set_data( nested_props, "_multi_audio", NULL, 0, NULL, NULL );
 265                         mlt_properties_set_int( nested_props, "_multi_samples", 0 );
 266                         mlt_consumer_start( nested );
 267                 }
 268         } while ( nested );
 269 }
 270
 271 static void foreach_consumer_refresh( mlt_consumer consumer )
 272 {
 273         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 274         mlt_consumer nested = NULL;
 275         char key[30];
 276         int index = 0;
 277
 278         do {
 279                 snprintf( key, sizeof(key), "%d.consumer", index++ );
 280                 nested = mlt_properties_get_data( properties, key, NULL );
 281                 if ( nested ) mlt_properties_set_int( MLT_CONSUMER_PROPERTIES(nested), "refresh", 1 );
 282         } while ( nested );
 283 }
 284
 285 static void foreach_consumer_put( mlt_consumer consumer, mlt_frame frame )
 286 {
 287         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 288         mlt_consumer nested = NULL;
 289         char key[30];
 290         int index = 0;
 291
 292         do {
 293                 snprintf( key, sizeof(key), "%d.consumer", index++ );
 294                 nested = mlt_properties_get_data( properties, key, NULL );
 295                 if ( nested )
 296                 {
 297                         mlt_properties nested_props = MLT_CONSUMER_PROPERTIES(nested);
 298                         double self_fps = mlt_properties_get_double( properties, "fps" );
 299                         double nested_fps = mlt_properties_get_double( nested_props, "fps" );
 300                         mlt_position nested_pos = mlt_properties_get_position( nested_props, "_multi_position" );
 301                         mlt_position self_pos = mlt_frame_get_position( frame );
 302                         double self_time = self_pos / self_fps;
 303                         double nested_time = nested_pos / nested_fps;
 304
 305                         // get the audio for the current frame
 306                         uint8_t *buffer = NULL;
 307                         mlt_audio_format format = mlt_audio_s16;
 308                         int channels = mlt_properties_get_int( properties, "channels" );
 309                         int frequency = mlt_properties_get_int( properties, "frequency" );
 310                         int current_samples = mlt_sample_calculator( self_fps, frequency, self_pos );
 311                         mlt_frame_get_audio( frame, (void**) &buffer, &format, &frequency, &channels, &current_samples );
 312                         int current_size = mlt_audio_format_size( format, current_samples, channels );
 313
 314                         // get any leftover audio
 315                         int prev_size = 0;
 316                         uint8_t *prev_buffer = mlt_properties_get_data( nested_props, "_multi_audio", &prev_size );
 317                         uint8_t *new_buffer = NULL;
 318                         if ( prev_size > 0 )
 319                         {
 320                                 new_buffer = mlt_pool_alloc( prev_size + current_size );
 321                                 memcpy( new_buffer, prev_buffer, prev_size );
 322                                 memcpy( new_buffer + prev_size, buffer, current_size );
 323                                 buffer = new_buffer;
 324                         }
 325                         current_size += prev_size;
 326                         current_samples += mlt_properties_get_int( nested_props, "_multi_samples" );
 327
 328                         while ( nested_time <= self_time )
 329                         {
 330                                 // put ideal number of samples into cloned frame
 331                                 mlt_frame clone_frame = mlt_frame_clone( frame, 0 );
 332                                 int nested_samples = mlt_sample_calculator( nested_fps, frequency, nested_pos );
 333                                 // -10 is an optimization to avoid tiny amounts of leftover samples
 334                                 nested_samples = nested_samples > current_samples - 10 ? current_samples : nested_samples;
 335                                 int nested_size = mlt_audio_format_size( format, nested_samples, channels );
 336                                 if ( nested_size > 0 )
 337                                 {
 338                                         prev_buffer = mlt_pool_alloc( nested_size );
 339                                         memcpy( prev_buffer, buffer, nested_size );
 340                                 }
 341                                 else
 342                                 {
 343                                         prev_buffer = NULL;
 344                                         nested_size = 0;
 345                                 }
 346                                 mlt_frame_set_audio( clone_frame, prev_buffer, format, nested_size, mlt_pool_release );
 347                                 mlt_properties_set_int( MLT_FRAME_PROPERTIES(clone_frame), "audio_samples", nested_samples );
 348                                 mlt_properties_set_int( MLT_FRAME_PROPERTIES(clone_frame), "audio_frequency", frequency );
 349                                 mlt_properties_set_int( MLT_FRAME_PROPERTIES(clone_frame), "audio_channels", channels );
 350
 351                                 // chomp the audio
 352                                 current_samples -= nested_samples;
 353                                 current_size -= nested_size;
 354                                 buffer += nested_size;
 355
 356                                 // send frame to nested consumer
 357                                 mlt_consumer_put_frame( nested, clone_frame );
 358                                 mlt_properties_set_position( nested_props, "_multi_position", ++nested_pos );
 359                                 nested_time = nested_pos / nested_fps;
 360                         }
 361
 362                         // save any remaining audio
 363                         if ( current_size > 0 )
 364                         {
 365                                 prev_buffer = mlt_pool_alloc( current_size );
 366                                 memcpy( prev_buffer, buffer, current_size );
 367                         }
 368                         else
 369                         {
 370                                 prev_buffer = NULL;
 371                                 current_size = 0;
 372                         }
 373                         mlt_pool_release( new_buffer );
 374                         mlt_properties_set_data( nested_props, "_multi_audio", prev_buffer, current_size, mlt_pool_release, NULL );
 375                         mlt_properties_set_int( nested_props, "_multi_samples", current_samples );
 376                 }
 377         } while ( nested );
 378 }
 379
 380 static void foreach_consumer_stop( mlt_consumer consumer )
 381 {
 382         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 383         mlt_consumer nested = NULL;
 384         char key[30];
 385         int index = 0;
 386         struct timespec tm = { 0, 1000 * 1000 };
 387
 388         do {
 389                 snprintf( key, sizeof(key), "%d.consumer", index++ );
 390                 nested = mlt_properties_get_data( properties, key, NULL );
 391                 if ( nested )
 392                 {
 393                         // Let consumer with terminate_on_pause stop on their own
 394                         if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES(nested), "terminate_on_pause" ) )
 395                         {
 396                                 // Send additional dummy frame to unlatch nested consumer's threads
 397                                 mlt_consumer_put_frame( nested, mlt_frame_init( MLT_CONSUMER_SERVICE(consumer) ) );
 398                                 // wait for stop
 399                                 while ( !mlt_consumer_is_stopped( nested ) )
 400                                         nanosleep( &tm, NULL );
 401                         }
 402                         else
 403                         {
 404                                 mlt_consumer_stop( nested );
 405                         }
 406                 }
 407         } while ( nested );
 408 }
 409
 410 /** Start the consumer.
 411 */
 412
 413 static int start( mlt_consumer consumer )
 414 {
 415         // Check that we're not already running
 416         if ( is_stopped( consumer ) )
 417         {
 418                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 419                 pthread_t *thread = calloc( 1, sizeof( pthread_t ) );
 420
 421                 // Assign the thread to properties with automatic dealloc
 422                 mlt_properties_set_data( properties, "thread", thread, sizeof( pthread_t ), free, NULL );
 423
 424                 // Set the running state
 425                 mlt_properties_set_int( properties, "running", 1 );
 426                 mlt_properties_set_int( properties, "joined", 0 );
 427
 428                 // Construct and start nested consumers
 429                 if ( !mlt_properties_get_data( properties, "0.consumer", NULL ) )
 430                         foreach_consumer_init( consumer );
 431                 foreach_consumer_start( consumer );
 432
 433                 // Create the thread
 434                 pthread_create( thread, NULL, consumer_thread, consumer );
 435         }
 436         return 0;
 437 }
 438
 439 /** Stop the consumer.
 440 */
 441
 442 static int stop( mlt_consumer consumer )
 443 {
 444         // Check that we're running
 445         if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES(consumer), "joined" ) )
 446         {
 447                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 448                 pthread_t *thread = mlt_properties_get_data( properties, "thread", NULL );
 449
 450                 // Stop the thread
 451                 mlt_properties_set_int( properties, "running", 0 );
 452
 453                 // Wait for termination
 454                 if ( thread )
 455                 {
 456                         foreach_consumer_refresh( consumer );
 457                         pthread_join( *thread, NULL );
 458                 }
 459                 mlt_properties_set_int( properties, "joined", 1 );
 460
 461                 // Stop nested consumers
 462                 foreach_consumer_stop( consumer );
 463         }
 464
 465         return 0;
 466 }
 467
 468 /** Determine if the consumer is stopped.
 469 */
 470
 471 static int is_stopped( mlt_consumer consumer )
 472 {
 473         return !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "running" );
 474 }
 475
 476 /** The main thread - the argument is simply the consumer.
 477 */
 478
 479 static void *consumer_thread( void *arg )
 480 {
 481         mlt_consumer consumer = arg;
 482         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 483         mlt_frame frame = NULL;
 484
 485         // Determine whether to stop at end-of-media
 486         int terminate_on_pause = mlt_properties_get_int( properties, "terminate_on_pause" );
 487         int terminated = 0;
 488
 489         // Loop while running
 490         while ( !terminated && !is_stopped( consumer ) )
 491         {
 492                 // Get the next frame
 493                 frame = mlt_consumer_rt_frame( consumer );
 494
 495                 // Check for termination
 496                 if ( terminate_on_pause && frame )
 497                         terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
 498
 499                 // Check that we have a frame to work with
 500                 if ( frame && !terminated && !is_stopped( consumer ) )
 501                 {
 502                         if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES(frame), "rendered" ) )
 503                         {
 504                                 if ( mlt_properties_get_int( MLT_FRAME_PROPERTIES(frame), "_speed" ) == 0 )
 505                                         foreach_consumer_refresh( consumer );
 506                                 foreach_consumer_put( consumer, frame );
 507                                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 508                         }
 509                         else
 510                         {
 511                                 int dropped = mlt_properties_get_int( properties, "_dropped" );
 512                                 mlt_log_info( MLT_CONSUMER_SERVICE(consumer), "dropped frame %d\n", ++dropped );
 513                                 mlt_properties_set_int( properties, "_dropped", dropped );
 514                         }
 515                         mlt_frame_close( frame );
 516                 }
 517                 else
 518                 {
 519                         if ( frame && terminated )
 520                         {
 521                                 // Send this termination frame to nested consumers for their cancellation
 522                                 foreach_consumer_put( consumer, frame );
 523                                 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
 524                         }
 525                         if ( frame )
 526                                 mlt_frame_close( frame );
 527                         terminated = 1;
 528                 }
 529         }
 530
 531         // Indicate that the consumer is stopped
 532         mlt_consumer_stopped( consumer );
 533
 534         return NULL;
 535 }
 536
 537 /** Close the consumer.
 538 */
 539
 540 static void consumer_close( mlt_consumer consumer )
 541 {
 542         mlt_consumer_stop( consumer );
 543
 544         // Close the parent
 545         mlt_consumer_close( consumer );
 546         free( consumer );
 547 }