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 self, mlt_frame frame );
  65 static void consumer_sdl_event_cb( mlt_consumer sdl, mlt_consumer self, SDL_Event *event );
  66 static void consumer_refresh_cb( mlt_consumer sdl, mlt_consumer self, 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 self = calloc( 1, sizeof( struct consumer_sdl_s ) );
  71         if ( self != NULL && mlt_consumer_init( &self->parent, self, profile ) == 0 )
  72         {
  73                 // Get the parent consumer object
  74                 mlt_consumer parent = &self->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                 self->play = mlt_factory_consumer( profile, "sdl", arg );
  92                 self->still = mlt_factory_consumer( profile, "sdl_still", arg );
  93                 mlt_properties_set( properties, "rescale", "nearest" );
  94                 mlt_properties_set( properties, "deinterlace_method", "onefield" );
  95                 mlt_properties_set_int( properties, "prefill", 1 );
  96                 mlt_properties_set_int( properties, "top_field_first", -1 );
  97
  98                 parent->close = consumer_close;
  99                 parent->start = consumer_start;
 100                 parent->stop = consumer_stop;
 101                 parent->is_stopped = consumer_is_stopped;
 102                 self->joined = 1;
 103                 mlt_events_listen( MLT_CONSUMER_PROPERTIES( self->play ), self, "consumer-frame-show", ( mlt_listener )consumer_frame_show_cb );
 104                 mlt_events_listen( MLT_CONSUMER_PROPERTIES( self->still ), self, "consumer-frame-show", ( mlt_listener )consumer_frame_show_cb );
 105                 mlt_events_listen( MLT_CONSUMER_PROPERTIES( self->play ), self, "consumer-sdl-event", ( mlt_listener )consumer_sdl_event_cb );
 106                 mlt_events_listen( MLT_CONSUMER_PROPERTIES( self->still ), self, "consumer-sdl-event", ( mlt_listener )consumer_sdl_event_cb );
 107                 pthread_cond_init( &self->refresh_cond, NULL );
 108                 pthread_mutex_init( &self->refresh_mutex, NULL );
 109                 mlt_events_listen( MLT_CONSUMER_PROPERTIES( parent ), self, "property-changed", ( mlt_listener )consumer_refresh_cb );
 110                 mlt_events_register( properties, "consumer-sdl-paused", NULL );
 111                 return parent;
 112         }
 113         free( self );
 114         return NULL;
 115 }
 116
 117 void consumer_frame_show_cb( mlt_consumer sdl, mlt_consumer parent, mlt_frame frame )
 118 {
 119         consumer_sdl self = parent->child;
 120         self->last_speed = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" );
 121         self->last_position = mlt_frame_get_position( frame );
 122         mlt_events_fire( MLT_CONSUMER_PROPERTIES( parent ), "consumer-frame-show", frame, NULL );
 123 }
 124
 125 static void consumer_sdl_event_cb( mlt_consumer sdl, mlt_consumer parent, SDL_Event *event )
 126 {
 127         mlt_events_fire( MLT_CONSUMER_PROPERTIES( parent ), "consumer-sdl-event", event, NULL );
 128 }
 129
 130 static void consumer_refresh_cb( mlt_consumer sdl, mlt_consumer parent, char *name )
 131 {
 132         if ( !strcmp( name, "refresh" ) )
 133         {
 134                 consumer_sdl self = parent->child;
 135                 pthread_mutex_lock( &self->refresh_mutex );
 136                 self->refresh_count = self->refresh_count <= 0 ? 1 : self->refresh_count + 1;
 137                 pthread_cond_broadcast( &self->refresh_cond );
 138                 pthread_mutex_unlock( &self->refresh_mutex );
 139         }
 140 }
 141
 142 static int consumer_start( mlt_consumer parent )
 143 {
 144         consumer_sdl self = parent->child;
 145
 146         if ( !self->running )
 147         {
 148                 // properties
 149                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
 150                 mlt_properties play = MLT_CONSUMER_PROPERTIES( self->play );
 151                 mlt_properties still = MLT_CONSUMER_PROPERTIES( self->still );
 152
 153                 char *window_id = mlt_properties_get( properties, "window_id" );
 154                 char *audio_driver = mlt_properties_get( properties, "audio_driver" );
 155                 char *video_driver = mlt_properties_get( properties, "video_driver" );
 156                 char *audio_device = mlt_properties_get( properties, "audio_device" );
 157                 char *output_display = mlt_properties_get( properties, "output_display" );
 158                 int progressive = mlt_properties_get_int( properties, "progressive" ) | mlt_properties_get_int( properties, "deinterlace" );
 159
 160                 consumer_stop( parent );
 161
 162                 self->running = 1;
 163                 self->joined = 0;
 164                 self->last_speed = 1;
 165
 166                 if ( output_display != NULL )
 167                         setenv( "DISPLAY", output_display, 1 );
 168
 169                 if ( window_id != NULL )
 170                         setenv( "SDL_WINDOWID", window_id, 1 );
 171
 172                 if ( video_driver != NULL )
 173                         setenv( "SDL_VIDEODRIVER", video_driver, 1 );
 174
 175                 if ( audio_driver != NULL )
 176                         setenv( "SDL_AUDIODRIVER", audio_driver, 1 );
 177
 178                 if ( audio_device != NULL )
 179                         setenv( "AUDIODEV", audio_device, 1 );
 180
 181                 pthread_mutex_lock( &mlt_sdl_mutex );
 182                 int ret = SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE );
 183                 pthread_mutex_unlock( &mlt_sdl_mutex );
 184                 if ( ret < 0 )
 185                 {
 186                         fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 187                         return -1;
 188                 }
 189
 190                 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 191                 SDL_EnableUNICODE( 1 );
 192
 193                 // Pass properties down
 194                 mlt_properties_set_data( play, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
 195                 mlt_properties_set_data( still, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
 196                 mlt_properties_set_data( play, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
 197                 mlt_properties_set_data( still, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
 198
 199                 mlt_properties_set_int( play, "progressive", progressive );
 200                 mlt_properties_set_int( still, "progressive", progressive );
 201
 202                 mlt_properties_pass_list( play, properties,
 203                         "deinterlace_method,resize,rescale,width,height,aspect_ratio,display_ratio,preview_off,preview_format,window_background"
 204                         ",top_field_first,volume,real_time,buffer,prefill,audio_off,frequency,drop_max" );
 205                 mlt_properties_pass_list( still, properties,
 206                         "deinterlace_method,resize,rescale,width,height,aspect_ratio,display_ratio,preview_off,preview_format,window_background"
 207                         ",top_field_first");
 208
 209                 mlt_properties_pass( play, properties, "play." );
 210                 mlt_properties_pass( still, properties, "still." );
 211
 212                 mlt_properties_set_data( play, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
 213                 mlt_properties_set_data( still, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
 214                 mlt_properties_set_data( play, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
 215                 mlt_properties_set_data( still, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
 216
 217                 mlt_properties_set_int( play, "put_mode", 1 );
 218                 mlt_properties_set_int( still, "put_mode", 1 );
 219                 mlt_properties_set_int( play, "terminate_on_pause", 1 );
 220
 221                 // Start the still producer just to initialise the gui
 222                 mlt_consumer_start( self->still );
 223                 self->active = self->still;
 224
 225                 // Inform child consumers that we control the sdl
 226                 mlt_properties_set_int( play, "sdl_started", 1 );
 227                 mlt_properties_set_int( still, "sdl_started", 1 );
 228
 229                 pthread_create( &self->thread, NULL, consumer_thread, self );
 230         }
 231
 232         return 0;
 233 }
 234
 235 static int consumer_stop( mlt_consumer parent )
 236 {
 237         // Get the actual object
 238         consumer_sdl self = parent->child;
 239
 240         if ( self->joined == 0 )
 241         {
 242                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
 243                 int app_locked = mlt_properties_get_int( properties, "app_locked" );
 244                 void ( *lock )( void ) = mlt_properties_get_data( properties, "app_lock", NULL );
 245                 void ( *unlock )( void ) = mlt_properties_get_data( properties, "app_unlock", NULL );
 246
 247                 if ( app_locked && unlock ) unlock( );
 248
 249                 // Kill the thread and clean up
 250                 self->running = 0;
 251
 252                 pthread_mutex_lock( &self->refresh_mutex );
 253                 pthread_cond_broadcast( &self->refresh_cond );
 254                 pthread_mutex_unlock( &self->refresh_mutex );
 255 #ifndef WIN32
 256                 if ( self->thread )
 257 #endif
 258                         pthread_join( self->thread, NULL );
 259                 self->joined = 1;
 260
 261                 if ( app_locked && lock ) lock( );
 262
 263                 pthread_mutex_lock( &mlt_sdl_mutex );
 264                 SDL_Quit( );
 265                 pthread_mutex_unlock( &mlt_sdl_mutex );
 266         }
 267
 268         return 0;
 269 }
 270
 271 static int consumer_is_stopped( mlt_consumer parent )
 272 {
 273         consumer_sdl self = parent->child;
 274         return !self->running;
 275 }
 276
 277 static void *consumer_thread( void *arg )
 278 {
 279         // Identify the arg
 280         consumer_sdl self = arg;
 281
 282         // Get the consumer
 283         mlt_consumer consumer = &self->parent;
 284
 285         // Get the properties
 286         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 287
 288         // internal intialization
 289         mlt_frame frame = NULL;
 290         int last_position = -1;
 291         int eos = 0;
 292         int eos_threshold = 20;
 293         if ( self->play )
 294                 eos_threshold = eos_threshold + mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( self->play ), "buffer" );
 295
 296         // Determine if the application is dealing with the preview
 297         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 298
 299         pthread_mutex_lock( &self->refresh_mutex );
 300         self->refresh_count = 0;
 301         pthread_mutex_unlock( &self->refresh_mutex );
 302
 303         // Loop until told not to
 304         while( self->running )
 305         {
 306                 // Get a frame from the attached producer
 307                 frame = mlt_consumer_get_frame( consumer );
 308
 309                 // Ensure that we have a frame
 310                 if ( self->running && frame != NULL )
 311                 {
 312                         // Get the speed of the frame
 313                         double speed = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" );
 314
 315                         // Lock during the operation
 316                         mlt_service_lock( MLT_CONSUMER_SERVICE( consumer ) );
 317
 318                         // Get refresh request for the current frame
 319                         int refresh = mlt_properties_get_int( properties, "refresh" );
 320
 321                         // Decrement refresh and clear changed
 322                         mlt_events_block( properties, properties );
 323                         mlt_properties_set_int( properties, "refresh", 0 );
 324                         mlt_events_unblock( properties, properties );
 325
 326                         // Unlock after the operation
 327                         mlt_service_unlock( MLT_CONSUMER_SERVICE( consumer ) );
 328
 329                         // Set the changed property on this frame for the benefit of still
 330                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "refresh", refresh );
 331
 332                         // Make sure the recipient knows that this frame isn't really rendered
 333                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 0 );
 334
 335                         // Optimisation to reduce latency
 336                         if ( speed == 1.0 )
 337                         {
 338                                 if ( last_position != -1 && last_position + 1 != mlt_frame_get_position( frame ) )
 339                                         mlt_consumer_purge( self->play );
 340                                 last_position = mlt_frame_get_position( frame );
 341                         }
 342                         else
 343                         {
 344                                 //mlt_consumer_purge( self->play );
 345                                 last_position = -1;
 346                         }
 347
 348                         // If we aren't playing normally, then use the still
 349                         if ( speed != 1 )
 350                         {
 351                                 mlt_producer producer = MLT_PRODUCER( mlt_service_get_producer( MLT_CONSUMER_SERVICE( consumer ) ) );
 352                                 mlt_position duration = producer? mlt_producer_get_playtime( producer ) : -1;
 353                                 int pause = 0;
 354
 355 #ifndef SKIP_WAIT_EOS
 356                                 if ( self->active == self->play )
 357                                 {
 358                                         // Do not interrupt the play consumer near the end
 359                                         if ( duration - self->last_position > eos_threshold )
 360                                         {
 361                                                 // Get a new frame at the sought position
 362                                                 mlt_frame_close( frame );
 363                                                 if ( producer )
 364                                                         mlt_producer_seek( producer, self->last_position );
 365                                                 frame = mlt_consumer_get_frame( consumer );
 366                                                 pause = 1;
 367                                         }
 368                                         else
 369                                         {
 370                                                 // Send frame with speed 0 to stop it
 371                                                 if ( frame && !mlt_consumer_is_stopped( self->play ) )
 372                                                 {
 373                                                         mlt_consumer_put_frame( self->play, frame );
 374                                                         frame = NULL;
 375                                                         eos = 1;
 376                                                 }
 377
 378                                                 // Check for end of stream
 379                                                 if ( mlt_consumer_is_stopped( self->play ) )
 380                                                 {
 381                                                         // Stream has ended
 382                                                         mlt_log_verbose( MLT_CONSUMER_SERVICE( consumer ), "END OF STREAM\n" );
 383                                                         pause = 1;
 384                                                         eos = 0; // reset eos indicator
 385                                                 }
 386                                                 else
 387                                                 {
 388                                                         // Prevent a tight busy loop
 389                                                         struct timespec tm = { 0, 100000L }; // 100 usec
 390                                                         nanosleep( &tm, NULL );
 391                                                 }
 392                                         }
 393                                 }
 394 #else
 395                                 pause = self->active == self->play;
 396 #endif
 397                                 if ( pause )
 398                                 {
 399                                         // Start the still consumer
 400                                         mlt_consumer_stop( self->play );
 401                                         self->last_speed = speed;
 402                                         self->active = self->still;
 403                                         self->ignore_change = 0;
 404                                         mlt_consumer_start( self->still );
 405                                 }
 406                                 // Send the frame to the active child
 407                                 if ( frame && !eos )
 408                                 {
 409                                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "refresh", 1 );
 410                                         mlt_consumer_put_frame( self->active, frame );
 411                                 }
 412                                 if ( pause && speed == 0.0 )
 413                                 {
 414                                         mlt_events_fire( properties, "consumer-sdl-paused", NULL );
 415                                 }
 416                         }
 417                         // Allow a little grace time before switching consumers on speed changes
 418                         else if ( self->ignore_change -- > 0 && self->active != NULL && !mlt_consumer_is_stopped( self->active ) )
 419                         {
 420                                 mlt_consumer_put_frame( self->active, frame );
 421                         }
 422                         // Otherwise use the normal player
 423                         else
 424                         {
 425                                 if ( !mlt_consumer_is_stopped( self->still ) )
 426                                         mlt_consumer_stop( self->still );
 427                                 if ( mlt_consumer_is_stopped( self->play ) )
 428                                 {
 429                                         self->last_speed = speed;
 430                                         self->active = self->play;
 431                                         self->ignore_change = 0;
 432                                         mlt_consumer_start( self->play );
 433                                 }
 434                                 if ( self->play )
 435                                         mlt_consumer_put_frame( self->play, frame );
 436                         }
 437
 438                         // Copy the rectangle info from the active consumer
 439                         if ( self->running && preview_off == 0 )
 440                         {
 441                                 mlt_properties active = MLT_CONSUMER_PROPERTIES( self->active );
 442                                 mlt_service_lock( MLT_CONSUMER_SERVICE( consumer ) );
 443                                 mlt_properties_set_int( properties, "rect_x", mlt_properties_get_int( active, "rect_x" ) );
 444                                 mlt_properties_set_int( properties, "rect_y", mlt_properties_get_int( active, "rect_y" ) );
 445                                 mlt_properties_set_int( properties, "rect_w", mlt_properties_get_int( active, "rect_w" ) );
 446                                 mlt_properties_set_int( properties, "rect_h", mlt_properties_get_int( active, "rect_h" ) );
 447                                 mlt_service_unlock( MLT_CONSUMER_SERVICE( consumer ) );
 448                         }
 449
 450                         if ( self->active == self->still )
 451                         {
 452                                 pthread_mutex_lock( &self->refresh_mutex );
 453                                 if ( self->running && speed == 0 && self->refresh_count <= 0 )
 454                                 {
 455                                         mlt_events_fire( properties, "consumer-sdl-paused", NULL );
 456                                         pthread_cond_wait( &self->refresh_cond, &self->refresh_mutex );
 457                                 }
 458                                 self->refresh_count --;
 459                                 pthread_mutex_unlock( &self->refresh_mutex );
 460                         }
 461                 }
 462                 else
 463                 {
 464                         if ( frame ) mlt_frame_close( frame );
 465                         mlt_consumer_put_frame( self->active, NULL );
 466                         self->running = 0;
 467                 }
 468         }
 469
 470         if ( self->play ) mlt_consumer_stop( self->play );
 471         if ( self->still ) mlt_consumer_stop( self->still );
 472
 473         return NULL;
 474 }
 475
 476 /** Callback to allow override of the close method.
 477 */
 478
 479 static void consumer_close( mlt_consumer parent )
 480 {
 481         // Get the actual object
 482         consumer_sdl self = parent->child;
 483
 484         // Stop the consumer
 485         mlt_consumer_stop( parent );
 486
 487         // Close the child consumers
 488         mlt_consumer_close( self->play );
 489         mlt_consumer_close( self->still );
 490
 491         // Now clean up the rest
 492         mlt_consumer_close( parent );
 493
 494         // Finally clean up self
 495         free( self );
 496 }