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