research.m1stereo.tv/gitweb/ - melted/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 program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program 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
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * 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                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
 139                 char *window_id = mlt_properties_get( properties, "window_id" );
 140                 char *audio_driver = mlt_properties_get( properties, "audio_driver" );
 141
 142                 consumer_stop( parent );
 143
 144                 this->running = 1;
 145                 this->joined = 0;
 146                 this->last_speed = 1;
 147
 148                 if ( window_id != NULL )
 149                         setenv( "SDL_WINDOWID", window_id, 1 );
 150
 151                 if ( audio_driver != NULL )
 152                         setenv( "SDL_AUDIODRIVER", audio_driver, 1 );
 153
 154                 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 155                 {
 156                         fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 157                         return -1;
 158                 }
 159
 160                 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 161                 SDL_EnableUNICODE( 1 );
 162
 163                 pthread_create( &this->thread, NULL, consumer_thread, this );
 164         }
 165
 166         return 0;
 167 }
 168
 169 static int consumer_stop( mlt_consumer parent )
 170 {
 171         // Get the actual object
 172         consumer_sdl this = parent->child;
 173
 174         if ( this->joined == 0 )
 175         {
 176                 mlt_properties properties = MLT_CONSUMER_PROPERTIES( parent );
 177                 int app_locked = mlt_properties_get_int( properties, "app_locked" );
 178                 void ( *lock )( void ) = mlt_properties_get_data( properties, "app_lock", NULL );
 179                 void ( *unlock )( void ) = mlt_properties_get_data( properties, "app_unlock", NULL );
 180
 181                 if ( app_locked && unlock ) unlock( );
 182
 183                 // Kill the thread and clean up
 184                 this->running = 0;
 185
 186                 pthread_mutex_lock( &this->refresh_mutex );
 187                 pthread_cond_broadcast( &this->refresh_cond );
 188                 pthread_mutex_unlock( &this->refresh_mutex );
 189
 190                 pthread_join( this->thread, NULL );
 191                 this->joined = 1;
 192
 193                 if ( app_locked && lock ) lock( );
 194
 195                 SDL_Quit( );
 196         }
 197
 198         return 0;
 199 }
 200
 201 static int consumer_is_stopped( mlt_consumer parent )
 202 {
 203         consumer_sdl this = parent->child;
 204         return !this->running;
 205 }
 206
 207 static void *consumer_thread( void *arg )
 208 {
 209         // Identify the arg
 210         consumer_sdl this = arg;
 211
 212         // Get the consumer
 213         mlt_consumer consumer = &this->parent;
 214
 215         // internal intialization
 216         int first = 1;
 217         mlt_frame frame = NULL;
 218         int last_position = -1;
 219
 220         // properties
 221         mlt_properties properties = MLT_CONSUMER_PROPERTIES( consumer );
 222         mlt_properties play = MLT_CONSUMER_PROPERTIES( this->play );
 223         mlt_properties still = MLT_CONSUMER_PROPERTIES( this->still );
 224
 225         int progressive = mlt_properties_get_int( properties, "progressive" ) | mlt_properties_get_int( properties, "deinterlace" );
 226
 227         // Inform child consumers that we control the sdl
 228         mlt_properties_set_int( play, "sdl_started", 1 );
 229         mlt_properties_set_int( still, "sdl_started", 1 );
 230
 231         // Pass properties down
 232         mlt_properties_set_data( play, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
 233         mlt_properties_set_data( still, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
 234         mlt_properties_set_data( play, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
 235         mlt_properties_set_data( still, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
 236         mlt_properties_set_int( play, "resize", mlt_properties_get_int( properties, "resize" ) );
 237         mlt_properties_set_int( still, "resize", mlt_properties_get_int( properties, "resize" ) );
 238         mlt_properties_set( play, "rescale", mlt_properties_get( properties, "rescale" ) );
 239         mlt_properties_set( still, "rescale", mlt_properties_get( properties, "rescale" ) );
 240         mlt_properties_set_int( play, "width", mlt_properties_get_int( properties, "width" ) );
 241         mlt_properties_set_int( still, "width", mlt_properties_get_int( properties, "width" ) );
 242         mlt_properties_set_int( play, "height", mlt_properties_get_int( properties, "height" ) );
 243         mlt_properties_set_int( still, "height", mlt_properties_get_int( properties, "height" ) );
 244         mlt_properties_set_double( play, "aspect_ratio", mlt_properties_get_double( properties, "aspect_ratio" ) );
 245         mlt_properties_set_double( still, "aspect_ratio", mlt_properties_get_double( properties, "aspect_ratio" ) );
 246         mlt_properties_set_double( play, "display_ratio", mlt_properties_get_double( properties, "display_ratio" ) );
 247         mlt_properties_set_double( still, "display_ratio", mlt_properties_get_double( properties, "display_ratio" ) );
 248
 249         mlt_properties_set_int( play, "progressive", progressive );
 250         mlt_properties_set_int( still, "progressive", progressive );
 251         mlt_properties_set( play, "deinterlace_method", mlt_properties_get( properties, "deinterlace_method" ) );
 252         mlt_properties_set( still, "deinterlace_method", mlt_properties_get( properties, "deinterlace_method" ) );
 253
 254         mlt_properties_pass( play, MLT_CONSUMER_PROPERTIES( consumer ), "play." );
 255         mlt_properties_pass( still, MLT_CONSUMER_PROPERTIES( consumer ), "still." );
 256
 257         mlt_properties_set_data( play, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
 258         mlt_properties_set_data( still, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
 259         mlt_properties_set_data( play, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
 260         mlt_properties_set_data( still, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
 261
 262         mlt_properties_set_int( play, "put_mode", 1 );
 263         mlt_properties_set_int( still, "put_mode", 1 );
 264
 265         this->refresh_count = 0;
 266
 267         // Loop until told not to
 268         while( this->running )
 269         {
 270                 // Get a frame from the attached producer
 271                 frame = mlt_consumer_get_frame( consumer );
 272
 273                 // Ensure that we have a frame
 274                 if ( this->running && frame != NULL )
 275                 {
 276                         // Get the speed of the frame
 277                         double speed = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" );
 278
 279                         // Lock during the operation
 280                         mlt_service_lock( MLT_CONSUMER_SERVICE( consumer ) );
 281
 282                         // Get refresh request for the current frame
 283                         int refresh = mlt_properties_get_int( properties, "refresh" );
 284
 285                         // Decrement refresh and clear changed
 286                         mlt_events_block( properties, properties );
 287                         mlt_properties_set_int( properties, "refresh", 0 );
 288                         mlt_events_unblock( properties, properties );
 289
 290                         // Unlock after the operation
 291                         mlt_service_unlock( MLT_CONSUMER_SERVICE( consumer ) );
 292
 293                         // Set the changed property on this frame for the benefit of still
 294                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "refresh", refresh );
 295
 296                         // Make sure the recipient knows that this frame isn't really rendered
 297                         mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "rendered", 0 );
 298
 299                         // Optimisation to reduce latency
 300                         if ( speed == 1.0 )
 301                         {
 302                                 if ( last_position != -1 && last_position + 1 != mlt_frame_get_position( frame ) )
 303                                         mlt_consumer_purge( this->play );
 304                                 last_position = mlt_frame_get_position( frame );
 305                         }
 306                         else
 307                         {
 308                                 //mlt_consumer_purge( this->play );
 309                                 last_position = -1;
 310                         }
 311
 312                         // If we're not the first frame and both consumers are stopped, then stop ourselves
 313                         if ( !first && mlt_consumer_is_stopped( this->play ) && mlt_consumer_is_stopped( this->still ) )
 314                         {
 315                                 this->running = 0;
 316                                 mlt_frame_close( frame );
 317                         }
 318                         // Allow a little grace time before switching consumers on speed changes
 319                         else if ( this->ignore_change -- > 0 && this->active != NULL && !mlt_consumer_is_stopped( this->active ) )
 320                         {
 321                                 mlt_consumer_put_frame( this->active, frame );
 322                         }
 323                         // If we aren't playing normally, then use the still
 324                         else if ( speed != 1 )
 325                         {
 326                                 if ( !mlt_consumer_is_stopped( this->play ) )
 327                                         mlt_consumer_stop( this->play );
 328                                 if ( mlt_consumer_is_stopped( this->still ) )
 329                                 {
 330                                         this->last_speed = speed;
 331                                         this->active = this->still;
 332                                         this->ignore_change = 0;
 333                                         mlt_consumer_start( this->still );
 334                                 }
 335                                 mlt_consumer_put_frame( this->still, frame );
 336                         }
 337                         // Otherwise use the normal player
 338                         else
 339                         {
 340                                 if ( !mlt_consumer_is_stopped( this->still ) )
 341                                         mlt_consumer_stop( this->still );
 342                                 if ( mlt_consumer_is_stopped( this->play ) )
 343                                 {
 344                                         this->last_speed = speed;
 345                                         this->active = this->play;
 346                                         this->ignore_change = 25;
 347                                         mlt_consumer_start( this->play );
 348                                 }
 349                                 mlt_consumer_put_frame( this->play, frame );
 350                         }
 351
 352                         // Copy the rectangle info from the active consumer
 353                         if ( this->running )
 354                         {
 355                                 mlt_properties active = MLT_CONSUMER_PROPERTIES( this->active );
 356                                 mlt_service_lock( MLT_CONSUMER_SERVICE( consumer ) );
 357                                 mlt_properties_set_int( properties, "rect_x", mlt_properties_get_int( active, "rect_x" ) );
 358                                 mlt_properties_set_int( properties, "rect_y", mlt_properties_get_int( active, "rect_y" ) );
 359                                 mlt_properties_set_int( properties, "rect_w", mlt_properties_get_int( active, "rect_w" ) );
 360                                 mlt_properties_set_int( properties, "rect_h", mlt_properties_get_int( active, "rect_h" ) );
 361                                 mlt_service_unlock( MLT_CONSUMER_SERVICE( consumer ) );
 362                         }
 363
 364                         if ( this->active == this->still )
 365                         {
 366                                 pthread_mutex_lock( &this->refresh_mutex );
 367                                 if ( this->running && speed == 0 && this->refresh_count <= 0 )
 368                                         pthread_cond_wait( &this->refresh_cond, &this->refresh_mutex );
 369                                 this->refresh_count --;
 370                                 pthread_mutex_unlock( &this->refresh_mutex );
 371                         }
 372
 373                         // We are definitely not waiting on the first frame any more
 374                         first = 0;
 375                 }
 376                 else
 377                 {
 378                         if ( frame ) mlt_frame_close( frame );
 379                         mlt_consumer_put_frame( this->active, NULL );
 380                         this->running = 0;
 381                 }
 382         }
 383
 384         if ( this->play ) mlt_consumer_stop( this->play );
 385         if ( this->still ) mlt_consumer_stop( this->still );
 386
 387         return NULL;
 388 }
 389
 390 /** Callback to allow override of the close method.
 391 */
 392
 393 static void consumer_close( mlt_consumer parent )
 394 {
 395         // Get the actual object
 396         consumer_sdl this = parent->child;
 397
 398         // Stop the consumer
 399         mlt_consumer_stop( parent );
 400
 401         // Close the child consumers
 402         mlt_consumer_close( this->play );
 403         mlt_consumer_close( this->still );
 404
 405         // Now clean up the rest
 406         mlt_consumer_close( parent );
 407
 408         // Finally clean up this
 409         free( this );
 410 }