git.sesse.net Git - mlt/blob - src/modules/sdl/consumer_sdl_preview.c

   1 /*
   2  * consumer_sdl_preview.c -- A Simple DirectMedia Layer consumer
   3  * Copyright (C) 2004-2005, 2010 Ushodaya Enterprises Limited
   4  * Author: Charles Yates
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include <framework/mlt_consumer.h>
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_factory.h>
  24 #include <framework/mlt_producer.h>
  25 #include <framework/mlt_log.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <pthread.h>
  29 #include <SDL.h>
  30 #include <SDL_syswm.h>
  31 #include <sys/time.h>
  32
  33 extern pthread_mutex_t mlt_sdl_mutex;
  34
  35 typedef struct consumer_sdl_s *consumer_sdl;
  36
  37 struct consumer_sdl_s
  38 {
  39         struct mlt_consumer_s parent;
  40         mlt_consumer active;
  41         int ignore_change;
  42         mlt_consumer play;
  43         mlt_consumer still;
  44         pthread_t thread;
  45         int joined;
  46         int running;
  47         int sdl_flags;
  48         double last_speed;
  49         mlt_position last_position;
  50
  51         pthread_cond_t refresh_cond;
  52         pthread_mutex_t refresh_mutex;
  53         int refresh_count;
  54 };
  55
  56 /** Forward references to static functions.
  57 */
  58
  59 static int consumer_start( mlt_consumer parent );
  60 static int consumer_stop( mlt_consumer parent );
  61 static int consumer_is_stopped( mlt_consumer parent );
  62 static void consumer_close( mlt_consumer parent );
  63 static void *consumer_thread( void * );
  64 static void consumer_frame_show_cb( mlt_consumer sdl, mlt_consumer this, mlt_frame frame );
  65 static void consumer_sdl_event_cb( mlt_consumer sdl, mlt_consumer this, SDL_Event *event );
  66 static void consumer_refresh_cb( mlt_consumer sdl, mlt_consumer this, char *name );
  67
  68 mlt_consumer consumer_sdl_preview_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
  69 {
  70         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  71         if ( this != NULL && mlt_consumer_init( &this->parent, this, profile ) == 0 )
  72         {
  73                 // Get the parent consumer object
  74                 mlt_consumer parent = &this->parent;
  75
  76                 // Get the properties
  77                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
  78
  79                 // Get the width and height
  80                 int width = mlt_properties_get_int( properties, "width" );
  81                 int height = mlt_properties_get_int( properties, "height" );
  82
  83                 // Process actual param
  84                 if ( arg == NULL || sscanf( arg, "%dx%d", &width, &height ) == 2 )
  85                 {
  86                         mlt_properties_set_int( properties, "width", width );
  87                         mlt_properties_set_int( properties, "height", height );
  88                 }
  89
  90                 // Create child consumers
  91                 this->play = mlt_factory_consumer( profile, "sdl", arg );
  92                 this->still = mlt_factory_consumer( profile, "sdl_still", arg );
  93                 mlt_properties_set( properties, "real_time", "0" );
  94                 mlt_properties_set( properties, "rescale", "nearest" );
  95                 mlt_properties_set( properties, "deinterlace_method", "onefield" );
  96                 mlt_properties_set_int( properties, "prefill", 1 );
  97                 parent->close = consumer_close;
  98                 parent->start = consumer_start;
  99                 parent->stop = consumer_stop;
 100                 parent->is_stopped = consumer_is_stopped;
 101                 this->joined = 1;
 102                 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->play ), this, "consumer-frame-show", ( mlt_listener )consumer_frame_show_cb );
 103                 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->still ), this, "consumer-frame-show", ( mlt_listener )consumer_frame_show_cb );
 104                 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->play ), this, "consumer-sdl-event", ( mlt_listener )consumer_sdl_event_cb );
 105                 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->still ), this, "consumer-sdl-event", ( mlt_listener )consumer_sdl_event_cb );
 106                 pthread_cond_init( &this->refresh_cond, NULL );
 107                 pthread_mutex_init( &this->refresh_mutex, NULL );
 108                 mlt_events_listen( MLT_CONSUMER_PROPERTIES( parent ), this, "property-changed", ( mlt_listener )consumer_refresh_cb );
 109                 mlt_events_register( properties, "consumer-sdl-paused", NULL );
 110                 return parent;
 111         }
 112         free( this );
 113         return NULL;
 114 }
 115
 116 void consumer_frame_show_cb( mlt_consumer sdl, mlt_consumer parent, mlt_frame frame )
 117 {
 118         consumer_sdl this = parent->child;
 119         this->last_speed = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" );
 120         this->last_position = mlt_frame_get_position( frame );
 121         mlt_events_fire( MLT_CONSUMER_PROPERTIES( parent ), "consumer-frame-show", frame, NULL );
 122 }
 123
 124 static void consumer_sdl_event_cb( mlt_consumer sdl, mlt_consumer parent, SDL_Event *event )
 125 {
 126         mlt_events_fire( MLT_CONSUMER_PROPERTIES( parent ), "consumer-sdl-event", event, NULL );
 127 }
 128
 129 static void consumer_refresh_cb( mlt_consumer sdl, mlt_consumer parent, char *name )
 130 {
 131         if ( !strcmp( name, "refresh" ) )
 132         {
 133                 consumer_sdl this = parent->child;
 134                 pthread_mutex_lock( &this->refresh_mutex );
 135                 this->refresh_count = this->refresh_count <= 0 ? 1 : this->refresh_count + 1;
 136                 pthread_cond_broadcast( &this->refresh_cond );
 137                 pthread_mutex_unlock( &this->refresh_mutex );
 138         }
 139 }
 140
 141 static int consumer_start( mlt_consumer parent )
 142 {
 143         consumer_sdl this = parent->child;
 144
 145         if ( !this->running )
 146         {
 147                 // properties
 148                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
 149                 mlt_properties play = MLT_CONSUMER_PROPERTIES( this->play );
 150                 mlt_properties still = MLT_CONSUMER_PROPERTIES( this->still );
 151
 152                 char *window_id = mlt_properties_get( properties, "window_id" );
 153                 char *audio_driver = mlt_properties_get( properties, "audio_driver" );
 154                 char *video_driver = mlt_properties_get( properties, "video_driver" );
 155                 char *audio_device = mlt_properties_get( properties, "audio_device" );
 156                 char *output_display = mlt_properties_get( properties, "output_display" );
 157                 int progressive = mlt_properties_get_int( properties, "progressive" ) | mlt_properties_get_int( properties, "deinterlace" );
 158
 159                 consumer_stop( parent );
 160
 161                 this->running = 1;
 162                 this->joined = 0;
 163                 this->last_speed = 1;
 164
 165                 if ( output_display != NULL )
 166                         setenv( "DISPLAY", output_display, 1 );
 167
 168                 if ( window_id != NULL )
 169                         setenv( "SDL_WINDOWID", window_id, 1 );
 170
 171                 if ( video_driver != NULL )
 172                         setenv( "SDL_VIDEODRIVER", video_driver, 1 );
 173
 174                 if ( audio_driver != NULL )
 175                         setenv( "SDL_AUDIODRIVER", audio_driver, 1 );
 176
 177                 if ( audio_device != NULL )
 178                         setenv( "AUDIODEV", audio_device, 1 );
 179
 180                 pthread_mutex_lock( &mlt_sdl_mutex );
 181                 int ret = SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE );
 182                 pthread_mutex_unlock( &mlt_sdl_mutex );
 183                 if ( ret < 0 )
 184                 {
 185                         fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 186                         return -1;
 187                 }
 188
 189                 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 190                 SDL_EnableUNICODE( 1 );
 191
 192                 // Pass properties down
 193                 mlt_properties_set_data( play, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
 194                 mlt_properties_set_data( still, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
 195                 mlt_properties_set_data( play, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
 196                 mlt_properties_set_data( still, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
 197
 198                 mlt_properties_set_int( play, "progressive", progressive );
 199                 mlt_properties_set_int( still, "progressive", progressive );
 200
 201                 mlt_properties_pass_list( play, properties,
 202                         "deinterlace_method,resize,rescale,width,height,aspect_ratio,display_ratio,volume,real_time,buffer,prefill" );
 203                 mlt_properties_pass_list( still, properties,
 204                         "deinterlace_method,resize,rescale,width,height,aspect_ratio,display_ratio" );
 205                 mlt_properties_pass_list( play, properties, "preview_off,preview_format,window_background" );
 206                 mlt_properties_pass_list( still, properties, "preview_off,preview_format,window_background" );
 207
 208                 mlt_properties_pass( play, properties, "play." );
 209                 mlt_properties_pass( still, properties, "still." );
 210
 211                 mlt_properties_set_data( play, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
 212                 mlt_properties_set_data( still, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
 213                 mlt_properties_set_data( play, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
 214                 mlt_properties_set_data( still, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
 215
 216                 mlt_properties_set_int( play, "put_mode", 1 );
 217                 mlt_properties_set_int( still, "put_mode", 1 );
 218                 mlt_properties_set_int( play, "terminate_on_pause", 1 );
 219
 220                 // Start the still producer just to initialise the gui
 221                 mlt_consumer_start( this->still );
 222                 this->active = this->still;
 223
 224                 // Inform child consumers that we control the sdl
 225                 mlt_properties_set_int( play, "sdl_started", 1 );
 226                 mlt_properties_set_int( still, "sdl_started", 1 );
 227
 228                 pthread_create( &this->thread, NULL, consumer_thread, this );
 229         }
 230
 231         return 0;
 232 }
 233
 234 static int consumer_stop( mlt_consumer parent )
 235 {
 236         // Get the actual object
 237         consumer_sdl this = parent->child;
 238
 239         if ( this->joined == 0 )
 240         {
 241                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
 242                 int app_locked = mlt_properties_get_int( properties, "app_locked" );
 243                 void ( *lock )( void ) = mlt_properties_get_data( properties, "app_lock", NULL );
 244                 void ( *unlock )( void ) = mlt_properties_get_data( properties, "app_unlock", NULL );
 245
 246                 if ( app_locked && unlock ) unlock( );
 247
 248                 // Kill the thread and clean up
 249                 this->running = 0;
 250
 251                 pthread_mutex_lock( &this->refresh_mutex );
 252                 pthread_cond_broadcast( &this->refresh_cond );
 253                 pthread_mutex_unlock( &this->refresh_mutex );
 254 #ifndef WIN32
 255                 if ( this->thread )
 256 #endif
 257                         pthread_join( this->thread, NULL );
 258                 this->joined = 1;
 259
 260                 if ( app_locked && lock ) lock( );
 261
 262                 pthread_mutex_lock( &mlt_sdl_mutex );
 263                 SDL_Quit( );
 264                 pthread_mutex_unlock( &mlt_sdl_mutex );
 265         }
 266
 267         return 0;
 268 }
 269
 270 static int consumer_is_stopped( mlt_consumer parent )
 271 {
 272         consumer_sdl this = parent->child;
 273         return !this->running;
 274 }
 275
 276 static void *consumer_thread( void *arg )
 277 {
 278         // Identify the arg
 279         consumer_sdl this = arg;
 280
 281         // Get the consumer
 282         mlt_consumer consumer = &this->parent;
 283
 284         // Get the properties
 285         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 286
 287         // internal intialization
 288         int first = 1;
 289         mlt_frame frame = NULL;
 290         int last_position = -1;
 291         int eos = 0;
 292         int eos_threshold = 20 + mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( this->play ), "buffer" );
 293
 294         // Determine if the application is dealing with the preview
 295         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 296
 297         this->refresh_count = 0;
 298
 299         // Loop until told not to
 300         while( this->running )
 301         {
 302                 // Get a frame from the attached producer
 303                 frame = mlt_consumer_get_frame( consumer );
 304
 305                 // Ensure that we have a frame
 306                 if ( this->running && frame != NULL )
 307                 {
 308                         // Get the speed of the frame
 309                         double speed = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" );
 310
 311                         // Lock during the operation
 312                         mlt_service_lock( MLT_CONSUMER_SERVICE( consumer ) );
 313
 314                         // Get refresh request for the current frame
 315                         int refresh = mlt_properties_get_int( properties, "refresh" );
 316
 317                         // Decrement refresh and clear changed
 318                         mlt_events_block( properties, properties );
 319                         mlt_properties_set_int( properties, "refresh", 0 );
 320                         mlt_events_unblock( properties, properties );
 321
 322                         // Unlock after the operation
 323                         mlt_service_unlock( MLT_CONSUMER_SERVICE( consumer ) );
 324
 325                         // Set the changed property on this frame for the benefit of still
 326                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "refresh", refresh );
 327
 328                         // Make sure the recipient knows that this frame isn't really rendered
 329                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 0 );
 330
 331                         // Optimisation to reduce latency
 332                         if ( speed == 1.0 )
 333                         {
 334                                 if ( last_position != -1 && last_position + 1 != mlt_frame_get_position( frame ) )
 335                                         mlt_consumer_purge( this->play );
 336                                 last_position = mlt_frame_get_position( frame );
 337                         }
 338                         else
 339                         {
 340                                 //mlt_consumer_purge( this->play );
 341                                 last_position = -1;
 342                         }
 343
 344                         // If we aren't playing normally, then use the still
 345                         if ( speed != 1 )
 346                         {
 347                                 mlt_producer producer = MLT_PRODUCER( mlt_service_get_producer( MLT_CONSUMER_SERVICE( consumer ) ) );
 348                                 mlt_position duration = mlt_producer_get_playtime( producer );
 349                                 int pause = 0;
 350
 351 #ifndef SKIP_WAIT_EOS
 352                                 if ( this->active == this->play )
 353                                 {
 354                                         // Do not interrupt the play consumer near the end
 355                                         if ( duration - this->last_position > eos_threshold )
 356                                         {
 357                                                 // Get a new frame at the sought position
 358                                                 mlt_frame_close( frame );
 359                                                 if ( producer )
 360                                                         mlt_producer_seek( producer, this->last_position );
 361                                                 frame = mlt_consumer_get_frame( consumer );
 362                                                 pause = 1;
 363                                         }
 364                                         else
 365                                         {
 366                                                 // Send frame with speed 0 to stop it
 367                                                 if ( frame && !mlt_consumer_is_stopped( this->play ) )
 368                                                 {
 369                                                         mlt_consumer_put_frame( this->play, frame );
 370                                                         frame = NULL;
 371                                                         eos = 1;
 372                                                 }
 373
 374                                                 // Check for end of stream
 375                                                 if ( mlt_consumer_is_stopped( this->play ) )
 376                                                 {
 377                                                         // Stream has ended
 378                                                         mlt_log_verbose( MLT_CONSUMER_SERVICE( consumer ), "END OF STREAM\n" );
 379                                                         pause = 1;
 380                                                         eos = 0; // reset eos indicator
 381                                                 }
 382                                                 else
 383                                                 {
 384                                                         // Prevent a tight busy loop
 385                                                         struct timespec tm = { 0, 100000L }; // 100 usec
 386                                                         nanosleep( &tm, NULL );
 387                                                 }
 388                                         }
 389                                 }
 390 #else
 391                                 pause = this->active == this->play;
 392 #endif
 393                                 if ( pause )
 394                                 {
 395                                         // Start the still consumer
 396                                         mlt_consumer_stop( this->play );
 397                                         this->last_speed = speed;
 398                                         this->active = this->still;
 399                                         this->ignore_change = 0;
 400                                         mlt_consumer_start( this->still );
 401                                 }
 402                                 // Send the frame to the active child
 403                                 if ( frame && !eos )
 404                                 {
 405                                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "refresh", 1 );
 406                                         mlt_consumer_put_frame( this->active, frame );
 407                                 }
 408                                 if ( pause && speed == 0.0 )
 409                                 {
 410                                         mlt_events_fire( properties, "consumer-sdl-paused", NULL );
 411                                 }
 412                         }
 413                         // Allow a little grace time before switching consumers on speed changes
 414                         else if ( this->ignore_change -- > 0 && this->active != NULL && !mlt_consumer_is_stopped( this->active ) )
 415                         {
 416                                 mlt_consumer_put_frame( this->active, frame );
 417                         }
 418                         // Otherwise use the normal player
 419                         else
 420                         {
 421                                 if ( !mlt_consumer_is_stopped( this->still ) )
 422                                         mlt_consumer_stop( this->still );
 423                                 if ( mlt_consumer_is_stopped( this->play ) )
 424                                 {
 425                                         this->last_speed = speed;
 426                                         this->active = this->play;
 427                                         this->ignore_change = 0;
 428                                         mlt_consumer_start( this->play );
 429                                 }
 430                                 mlt_consumer_put_frame( this->play, frame );
 431                         }
 432
 433                         // Copy the rectangle info from the active consumer
 434                         if ( this->running && preview_off == 0 )
 435                         {
 436                                 mlt_properties active = MLT_CONSUMER_PROPERTIES( this->active );
 437                                 mlt_service_lock( MLT_CONSUMER_SERVICE( consumer ) );
 438                                 mlt_properties_set_int( properties, "rect_x", mlt_properties_get_int( active, "rect_x" ) );
 439                                 mlt_properties_set_int( properties, "rect_y", mlt_properties_get_int( active, "rect_y" ) );
 440                                 mlt_properties_set_int( properties, "rect_w", mlt_properties_get_int( active, "rect_w" ) );
 441                                 mlt_properties_set_int( properties, "rect_h", mlt_properties_get_int( active, "rect_h" ) );
 442                                 mlt_service_unlock( MLT_CONSUMER_SERVICE( consumer ) );
 443                         }
 444
 445                         if ( this->active == this->still )
 446                         {
 447                                 pthread_mutex_lock( &this->refresh_mutex );
 448                                 if ( this->running && speed == 0 && this->refresh_count <= 0 )
 449                                 {
 450                                         mlt_events_fire( properties, "consumer-sdl-paused", NULL );
 451                                         pthread_cond_wait( &this->refresh_cond, &this->refresh_mutex );
 452                                 }
 453                                 this->refresh_count --;
 454                                 pthread_mutex_unlock( &this->refresh_mutex );
 455                         }
 456
 457                         // We are definitely not waiting on the first frame any more
 458                         first = 0;
 459                 }
 460                 else
 461                 {
 462                         if ( frame ) mlt_frame_close( frame );
 463                         mlt_consumer_put_frame( this->active, NULL );
 464                         this->running = 0;
 465                 }
 466         }
 467
 468         if ( this->play ) mlt_consumer_stop( this->play );
 469         if ( this->still ) mlt_consumer_stop( this->still );
 470
 471         return NULL;
 472 }
 473
 474 /** Callback to allow override of the close method.
 475 */
 476
 477 static void consumer_close( mlt_consumer parent )
 478 {
 479         // Get the actual object
 480         consumer_sdl this = parent->child;
 481
 482         // Stop the consumer
 483         mlt_consumer_stop( parent );
 484
 485         // Close the child consumers
 486         mlt_consumer_close( this->play );
 487         mlt_consumer_close( this->still );
 488
 489         // Now clean up the rest
 490         mlt_consumer_close( parent );
 491
 492         // Finally clean up this
 493         free( this );
 494 }