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