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 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 "consumer_sdl.h"
  22 #include <framework/mlt_frame.h>
  23 #include <framework/mlt_factory.h>
  24 #include <framework/mlt_producer.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <pthread.h>
  28 #include <SDL/SDL.h>
  29 #include <SDL/SDL_syswm.h>
  30
  31 typedef struct consumer_sdl_s *consumer_sdl;
  32
  33 struct consumer_sdl_s
  34 {
  35         struct mlt_consumer_s parent;
  36         mlt_consumer active;
  37         int ignore_change;
  38         mlt_consumer play;
  39         mlt_consumer still;
  40         pthread_t thread;
  41         int joined;
  42         int running;
  43         int sdl_flags;
  44         double last_speed;
  45
  46         pthread_cond_t refresh_cond;
  47         pthread_mutex_t refresh_mutex;
  48         int refresh_count;
  49 };
  50
  51 /** Forward references to static functions.
  52 */
  53
  54 static int consumer_start( mlt_consumer parent );
  55 static int consumer_stop( mlt_consumer parent );
  56 static int consumer_is_stopped( mlt_consumer parent );
  57 static void consumer_close( mlt_consumer parent );
  58 static void *consumer_thread( void * );
  59 static void consumer_frame_show_cb( mlt_consumer sdl, mlt_consumer this, mlt_frame frame );
  60 static void consumer_sdl_event_cb( mlt_consumer sdl, mlt_consumer this, SDL_Event *event );
  61 static void consumer_refresh_cb( mlt_consumer sdl, mlt_consumer this, char *name );
  62
  63 mlt_consumer consumer_sdl_preview_init( char *arg )
  64 {
  65         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  66         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
  67         {
  68                 // Get the parent consumer object
  69                 mlt_consumer parent = &this->parent;
  70
  71                 // Get the properties
  72                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
  73
  74                 // Get the width and height
  75                 int width = mlt_properties_get_int( properties, "width" );
  76                 int height = mlt_properties_get_int( properties, "height" );
  77
  78                 // Process actual param
  79                 if ( arg == NULL || sscanf( arg, "%dx%d", &width, &height ) == 2 )
  80                 {
  81                         mlt_properties_set_int( properties, "width", width );
  82                         mlt_properties_set_int( properties, "height", height );
  83                 }
  84
  85                 // Create child consumers
  86                 this->play = mlt_factory_consumer( "sdl", arg );
  87                 this->still = mlt_factory_consumer( "sdl_still", arg );
  88                 mlt_properties_set( MLT_CONSUMER_PROPERTIES( parent ), "real_time", "0" );
  89                 mlt_properties_set( MLT_CONSUMER_PROPERTIES( parent ), "rescale", "nearest" );
  90                 parent->close = consumer_close;
  91                 parent->start = consumer_start;
  92                 parent->stop = consumer_stop;
  93                 parent->is_stopped = consumer_is_stopped;
  94                 this->joined = 1;
  95                 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->play ), this, "consumer-frame-show", ( mlt_listener )consumer_frame_show_cb );
  96                 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->still ), this, "consumer-frame-show", ( mlt_listener )consumer_frame_show_cb );
  97                 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->play ), this, "consumer-sdl-event", ( mlt_listener )consumer_sdl_event_cb );
  98                 mlt_events_listen( MLT_CONSUMER_PROPERTIES( this->still ), this, "consumer-sdl-event", ( mlt_listener )consumer_sdl_event_cb );
  99                 pthread_cond_init( &this->refresh_cond, NULL );
 100                 pthread_mutex_init( &this->refresh_mutex, NULL );
 101                 mlt_events_listen( MLT_CONSUMER_PROPERTIES( parent ), this, "property-changed", ( mlt_listener )consumer_refresh_cb );
 102                 return parent;
 103         }
 104         free( this );
 105         return NULL;
 106 }
 107
 108 void consumer_frame_show_cb( mlt_consumer sdl, mlt_consumer parent, mlt_frame frame )
 109 {
 110         consumer_sdl this = parent->child;
 111         this->last_speed = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" );
 112         mlt_events_fire( MLT_CONSUMER_PROPERTIES( parent ), "consumer-frame-show", frame, NULL );
 113 }
 114
 115 static void consumer_sdl_event_cb( mlt_consumer sdl, mlt_consumer parent, SDL_Event *event )
 116 {
 117         mlt_events_fire( MLT_CONSUMER_PROPERTIES( parent ), "consumer-sdl-event", event, NULL );
 118 }
 119
 120 static void consumer_refresh_cb( mlt_consumer sdl, mlt_consumer parent, char *name )
 121 {
 122         if ( !strcmp( name, "refresh" ) )
 123         {
 124                 consumer_sdl this = parent->child;
 125                 pthread_mutex_lock( &this->refresh_mutex );
 126                 this->refresh_count = this->refresh_count <= 0 ? 1 : this->refresh_count ++;
 127                 pthread_cond_broadcast( &this->refresh_cond );
 128                 pthread_mutex_unlock( &this->refresh_mutex );
 129         }
 130 }
 131
 132 static int consumer_start( mlt_consumer parent )
 133 {
 134         consumer_sdl this = parent->child;
 135
 136         if ( !this->running )
 137         {
 138                 // properties
 139                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
 140                 mlt_properties play = MLT_CONSUMER_PROPERTIES( this->play );
 141                 mlt_properties still = MLT_CONSUMER_PROPERTIES( this->still );
 142
 143                 char *window_id = mlt_properties_get( properties, "window_id" );
 144                 char *audio_driver = mlt_properties_get( properties, "audio_driver" );
 145                 char *video_driver = mlt_properties_get( properties, "video_driver" );
 146                 char *audio_device = mlt_properties_get( properties, "audio_device" );
 147                 char *output_display = mlt_properties_get( properties, "output_display" );
 148                 int progressive = mlt_properties_get_int( properties, "progressive" ) | mlt_properties_get_int( properties, "deinterlace" );
 149
 150                 consumer_stop( parent );
 151
 152                 this->running = 1;
 153                 this->joined = 0;
 154                 this->last_speed = 1;
 155
 156                 if ( output_display != NULL )
 157                         setenv( "DISPLAY", output_display, 1 );
 158
 159                 if ( window_id != NULL )
 160                         setenv( "SDL_WINDOWID", window_id, 1 );
 161
 162                 if ( video_driver != NULL )
 163                         setenv( "SDL_VIDEODRIVER", video_driver, 1 );
 164
 165                 if ( audio_driver != NULL )
 166                         setenv( "SDL_AUDIODRIVER", audio_driver, 1 );
 167
 168                 if ( audio_device != NULL )
 169                         setenv( "AUDIODEV", audio_device, 1 );
 170
 171                 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 172                 {
 173                         fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 174                         return -1;
 175                 }
 176
 177                 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 178                 SDL_EnableUNICODE( 1 );
 179
 180                 // Pass properties down
 181                 mlt_properties_set_data( play, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
 182                 mlt_properties_set_data( still, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
 183                 mlt_properties_set_data( play, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
 184                 mlt_properties_set_data( still, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
 185
 186                 mlt_properties_set_int( play, "progressive", progressive );
 187                 mlt_properties_set_int( still, "progressive", progressive );
 188
 189                 mlt_properties_pass_list( play, properties, "resize,rescale,width,height,aspect_ratio,display_ratio,volume" );
 190                 mlt_properties_pass_list( still, properties, "resize,rescale,width,height,aspect_ratio,display_ratio" );
 191                 mlt_properties_pass_list( play, properties, "deinterlace_method" );
 192                 mlt_properties_pass_list( still, properties, "deinterlace_method" );
 193                 mlt_properties_pass_list( play, properties, "preview_off,preview_format" );
 194                 mlt_properties_pass_list( still, properties, "preview_off,preview_format" );
 195
 196                 mlt_properties_pass( play, properties, "play." );
 197                 mlt_properties_pass( still, properties, "still." );
 198
 199                 mlt_properties_set_data( play, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
 200                 mlt_properties_set_data( still, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
 201                 mlt_properties_set_data( play, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
 202                 mlt_properties_set_data( still, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
 203
 204                 mlt_properties_set_int( play, "put_mode", 1 );
 205                 mlt_properties_set_int( still, "put_mode", 1 );
 206
 207                 // Start the still producer just to initialise the gui
 208                 mlt_consumer_start( this->still );
 209                 this->active = this->still;
 210
 211                 // Inform child consumers that we control the sdl
 212                 mlt_properties_set_int( play, "sdl_started", 1 );
 213                 mlt_properties_set_int( still, "sdl_started", 1 );
 214
 215                 pthread_create( &this->thread, NULL, consumer_thread, this );
 216         }
 217
 218         return 0;
 219 }
 220
 221 static int consumer_stop( mlt_consumer parent )
 222 {
 223         // Get the actual object
 224         consumer_sdl this = parent->child;
 225
 226         if ( this->joined == 0 )
 227         {
 228                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
 229                 int app_locked = mlt_properties_get_int( properties, "app_locked" );
 230                 void ( *lock )( void ) = mlt_properties_get_data( properties, "app_lock", NULL );
 231                 void ( *unlock )( void ) = mlt_properties_get_data( properties, "app_unlock", NULL );
 232
 233                 if ( app_locked && unlock ) unlock( );
 234
 235                 // Kill the thread and clean up
 236                 this->running = 0;
 237
 238                 pthread_mutex_lock( &this->refresh_mutex );
 239                 pthread_cond_broadcast( &this->refresh_cond );
 240                 pthread_mutex_unlock( &this->refresh_mutex );
 241
 242                 pthread_join( this->thread, NULL );
 243                 this->joined = 1;
 244
 245                 if ( app_locked && lock ) lock( );
 246
 247                 SDL_Quit( );
 248         }
 249
 250         return 0;
 251 }
 252
 253 static int consumer_is_stopped( mlt_consumer parent )
 254 {
 255         consumer_sdl this = parent->child;
 256         return !this->running;
 257 }
 258
 259 static void *consumer_thread( void *arg )
 260 {
 261         // Identify the arg
 262         consumer_sdl this = arg;
 263
 264         // Get the consumer
 265         mlt_consumer consumer = &this->parent;
 266
 267         // Get the properties
 268         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 269
 270         // internal intialization
 271         int first = 1;
 272         mlt_frame frame = NULL;
 273         int last_position = -1;
 274
 275         // Determine if the application is dealing with the preview
 276         int preview_off = mlt_properties_get_int( properties, "preview_off" );
 277
 278         this->refresh_count = 0;
 279
 280         // Loop until told not to
 281         while( this->running )
 282         {
 283                 // Get a frame from the attached producer
 284                 frame = mlt_consumer_get_frame( consumer );
 285
 286                 // Ensure that we have a frame
 287                 if ( this->running && frame != NULL )
 288                 {
 289                         // Get the speed of the frame
 290                         double speed = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" );
 291
 292                         // Lock during the operation
 293                         mlt_service_lock( MLT_CONSUMER_SERVICE( consumer ) );
 294
 295                         // Get refresh request for the current frame
 296                         int refresh = mlt_properties_get_int( properties, "refresh" );
 297
 298                         // Decrement refresh and clear changed
 299                         mlt_events_block( properties, properties );
 300                         mlt_properties_set_int( properties, "refresh", 0 );
 301                         mlt_events_unblock( properties, properties );
 302
 303                         // Unlock after the operation
 304                         mlt_service_unlock( MLT_CONSUMER_SERVICE( consumer ) );
 305
 306                         // Set the changed property on this frame for the benefit of still
 307                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "refresh", refresh );
 308
 309                         // Make sure the recipient knows that this frame isn't really rendered
 310                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 0 );
 311
 312                         // Optimisation to reduce latency
 313                         if ( speed == 1.0 )
 314                         {
 315                                 if ( last_position != -1 && last_position + 1 != mlt_frame_get_position( frame ) )
 316                                         mlt_consumer_purge( this->play );
 317                                 last_position = mlt_frame_get_position( frame );
 318                         }
 319                         else
 320                         {
 321                                 //mlt_consumer_purge( this->play );
 322                                 last_position = -1;
 323                         }
 324
 325                         // If we're not the first frame and both consumers are stopped, then stop ourselves
 326                         if ( !first && mlt_consumer_is_stopped( this->play ) && mlt_consumer_is_stopped( this->still ) )
 327                         {
 328                                 this->running = 0;
 329                                 mlt_frame_close( frame );
 330                         }
 331                         // Allow a little grace time before switching consumers on speed changes
 332                         else if ( this->ignore_change -- > 0 && this->active != NULL && !mlt_consumer_is_stopped( this->active ) )
 333                         {
 334                                 mlt_consumer_put_frame( this->active, frame );
 335                         }
 336                         // If we aren't playing normally, then use the still
 337                         else if ( speed != 1 )
 338                         {
 339                                 if ( !mlt_consumer_is_stopped( this->play ) )
 340                                         mlt_consumer_stop( this->play );
 341                                 if ( mlt_consumer_is_stopped( this->still ) )
 342                                 {
 343                                         this->last_speed = speed;
 344                                         this->active = this->still;
 345                                         this->ignore_change = 0;
 346                                         mlt_consumer_start( this->still );
 347                                 }
 348                                 mlt_consumer_put_frame( this->still, frame );
 349                         }
 350                         // Otherwise use the normal player
 351                         else
 352                         {
 353                                 if ( !mlt_consumer_is_stopped( this->still ) )
 354                                         mlt_consumer_stop( this->still );
 355                                 if ( mlt_consumer_is_stopped( this->play ) )
 356                                 {
 357                                         this->last_speed = speed;
 358                                         this->active = this->play;
 359                                         this->ignore_change = 25;
 360                                         mlt_consumer_start( this->play );
 361                                 }
 362                                 mlt_consumer_put_frame( this->play, frame );
 363                         }
 364
 365                         // Copy the rectangle info from the active consumer
 366                         if ( this->running && preview_off == 0 )
 367                         {
 368                                 mlt_properties active = MLT_CONSUMER_PROPERTIES( this->active );
 369                                 mlt_service_lock( MLT_CONSUMER_SERVICE( consumer ) );
 370                                 mlt_properties_set_int( properties, "rect_x", mlt_properties_get_int( active, "rect_x" ) );
 371                                 mlt_properties_set_int( properties, "rect_y", mlt_properties_get_int( active, "rect_y" ) );
 372                                 mlt_properties_set_int( properties, "rect_w", mlt_properties_get_int( active, "rect_w" ) );
 373                                 mlt_properties_set_int( properties, "rect_h", mlt_properties_get_int( active, "rect_h" ) );
 374                                 mlt_service_unlock( MLT_CONSUMER_SERVICE( consumer ) );
 375                         }
 376
 377                         if ( this->active == this->still )
 378                         {
 379                                 pthread_mutex_lock( &this->refresh_mutex );
 380                                 if ( this->running && speed == 0 && this->refresh_count <= 0 )
 381                                         pthread_cond_wait( &this->refresh_cond, &this->refresh_mutex );
 382                                 this->refresh_count --;
 383                                 pthread_mutex_unlock( &this->refresh_mutex );
 384                         }
 385
 386                         // We are definitely not waiting on the first frame any more
 387                         first = 0;
 388                 }
 389                 else
 390                 {
 391                         if ( frame ) mlt_frame_close( frame );
 392                         mlt_consumer_put_frame( this->active, NULL );
 393                         this->running = 0;
 394                 }
 395         }
 396
 397         if ( this->play ) mlt_consumer_stop( this->play );
 398         if ( this->still ) mlt_consumer_stop( this->still );
 399
 400         return NULL;
 401 }
 402
 403 /** Callback to allow override of the close method.
 404 */
 405
 406 static void consumer_close( mlt_consumer parent )
 407 {
 408         // Get the actual object
 409         consumer_sdl this = parent->child;
 410
 411         // Stop the consumer
 412         mlt_consumer_stop( parent );
 413
 414         // Close the child consumers
 415         mlt_consumer_close( this->play );
 416         mlt_consumer_close( this->still );
 417
 418         // Now clean up the rest
 419         mlt_consumer_close( parent );
 420
 421         // Finally clean up this
 422         free( this );
 423 }