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