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 <pthread.h>
  27 #include <SDL/SDL.h>
  28 #include <SDL/SDL_syswm.h>
  29
  30 typedef struct consumer_sdl_s *consumer_sdl;
  31
  32 struct consumer_sdl_s
  33 {
  34         struct mlt_consumer_s parent;
  35         mlt_consumer active;
  36         int ignore_change;
  37         mlt_consumer play;
  38         mlt_consumer still;
  39         pthread_t thread;
  40         int joined;
  41         int running;
  42         int sdl_flags;
  43         double last_speed;
  44 };
  45
  46 /** Forward references to static functions.
  47 */
  48
  49 static int consumer_start( mlt_consumer parent );
  50 static int consumer_stop( mlt_consumer parent );
  51 static int consumer_is_stopped( mlt_consumer parent );
  52 static void consumer_close( mlt_consumer parent );
  53 static void *consumer_thread( void * );
  54 static void consumer_frame_show_cb( mlt_consumer sdl, mlt_consumer this, mlt_frame frame );
  55 static void consumer_sdl_event_cb( mlt_consumer sdl, mlt_consumer this, SDL_Event *event );
  56
  57 mlt_consumer consumer_sdl_preview_init( char *arg )
  58 {
  59         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  60         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
  61         {
  62                 // Get the parent consumer object
  63                 mlt_consumer parent = &this->parent;
  64                 this->play = mlt_factory_consumer( "sdl", arg );
  65                 this->still = mlt_factory_consumer( "sdl_still", arg );
  66                 mlt_properties_set( mlt_consumer_properties( parent ), "real_time", "0" );
  67                 parent->close = consumer_close;
  68                 parent->start = consumer_start;
  69                 parent->stop = consumer_stop;
  70                 parent->is_stopped = consumer_is_stopped;
  71                 this->joined = 1;
  72                 mlt_events_listen( mlt_consumer_properties( this->play ), this, "consumer-frame-show", ( mlt_listener )consumer_frame_show_cb );
  73                 mlt_events_listen( mlt_consumer_properties( this->still ), this, "consumer-frame-show", ( mlt_listener )consumer_frame_show_cb );
  74                 mlt_events_listen( mlt_consumer_properties( this->play ), this, "consumer-sdl-event", ( mlt_listener )consumer_sdl_event_cb );
  75                 mlt_events_listen( mlt_consumer_properties( this->still ), this, "consumer-sdl-event", ( mlt_listener )consumer_sdl_event_cb );
  76                 return parent;
  77         }
  78         free( this );
  79         return NULL;
  80 }
  81
  82 void consumer_frame_show_cb( mlt_consumer sdl, mlt_consumer parent, mlt_frame frame )
  83 {
  84         consumer_sdl this = parent->child;
  85         this->last_speed = mlt_properties_get_double( mlt_frame_properties( frame ), "_speed" );
  86         mlt_events_fire( mlt_consumer_properties( parent ), "consumer-frame-show", frame, NULL );
  87 }
  88
  89 static void consumer_sdl_event_cb( mlt_consumer sdl, mlt_consumer parent, SDL_Event *event )
  90 {
  91         mlt_events_fire( mlt_consumer_properties( parent ), "consumer-sdl-event", event, NULL );
  92 }
  93
  94 static int consumer_start( mlt_consumer parent )
  95 {
  96         consumer_sdl this = parent->child;
  97
  98         if ( !this->running )
  99         {
 100                 pthread_attr_t thread_attributes;
 101
 102                 consumer_stop( parent );
 103
 104                 this->running = 1;
 105                 this->joined = 0;
 106                 this->last_speed = 1;
 107
 108                 // Inherit the scheduling priority
 109                 pthread_attr_init( &thread_attributes );
 110                 pthread_attr_setinheritsched( &thread_attributes, PTHREAD_INHERIT_SCHED );
 111
 112                 pthread_create( &this->thread, &thread_attributes, consumer_thread, this );
 113         }
 114
 115         return 0;
 116 }
 117
 118 static int consumer_stop( mlt_consumer parent )
 119 {
 120         // Get the actual object
 121         consumer_sdl this = parent->child;
 122
 123         if ( this->joined == 0 )
 124         {
 125                 // Kill the thread and clean up
 126                 this->running = 0;
 127
 128                 pthread_join( this->thread, NULL );
 129                 this->joined = 1;
 130         }
 131
 132         return 0;
 133 }
 134
 135 static int consumer_is_stopped( mlt_consumer parent )
 136 {
 137         consumer_sdl this = parent->child;
 138         return !this->running;
 139 }
 140
 141 static void *consumer_thread( void *arg )
 142 {
 143         // Identify the arg
 144         consumer_sdl this = arg;
 145
 146         // Get the consumer
 147         mlt_consumer consumer = &this->parent;
 148
 149         // internal intialization
 150         int first = 1;
 151         mlt_frame frame = NULL;
 152
 153         // properties
 154         mlt_properties properties = mlt_consumer_properties( consumer );
 155         mlt_properties play = mlt_consumer_properties( this->play );
 156         mlt_properties still = mlt_consumer_properties( this->still );
 157
 158         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
 159         {
 160                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 161                 return NULL;
 162         }
 163
 164         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 165         SDL_EnableUNICODE( 1 );
 166
 167         // Inform child consumers that we control the sdl
 168         mlt_properties_set_int( play, "sdl_started", 1 );
 169         mlt_properties_set_int( still, "sdl_started", 1 );
 170
 171         // Pass properties down
 172         mlt_properties_set_data( play, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
 173         mlt_properties_set_data( still, "transport_producer", mlt_properties_get_data( properties, "transport_producer", NULL ), 0, NULL, NULL );
 174         mlt_properties_set_data( play, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
 175         mlt_properties_set_data( still, "transport_callback", mlt_properties_get_data( properties, "transport_callback", NULL ), 0, NULL, NULL );
 176         mlt_properties_set( play, "rescale", mlt_properties_get( properties, "rescale" ) );
 177         mlt_properties_set( still, "rescale", mlt_properties_get( properties, "rescale" ) );
 178         mlt_properties_set( play, "width", mlt_properties_get( properties, "width" ) );
 179         mlt_properties_set( still, "width", mlt_properties_get( properties, "width" ) );
 180         mlt_properties_set( play, "height", mlt_properties_get( properties, "height" ) );
 181         mlt_properties_set( still, "height", mlt_properties_get( properties, "height" ) );
 182
 183         mlt_properties_pass( play, mlt_consumer_properties( consumer ), "play." );
 184         mlt_properties_pass( still, mlt_consumer_properties( consumer ), "still." );
 185
 186         mlt_properties_set_data( play, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
 187         mlt_properties_set_data( still, "app_lock", mlt_properties_get_data( properties, "app_lock", NULL ), 0, NULL, NULL );
 188         mlt_properties_set_data( play, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
 189         mlt_properties_set_data( still, "app_unlock", mlt_properties_get_data( properties, "app_unlock", NULL ), 0, NULL, NULL );
 190
 191         mlt_properties_set_int( play, "put_mode", 1 );
 192         mlt_properties_set_int( still, "put_mode", 1 );
 193
 194         // Loop until told not to
 195         while( this->running )
 196         {
 197                 // Get a frame from the attached producer
 198                 frame = mlt_consumer_get_frame( consumer );
 199
 200                 // Ensure that we have a frame
 201                 if ( frame != NULL )
 202                 {
 203                         // Get the speed of the frame
 204                         double speed = mlt_properties_get_double( mlt_frame_properties( frame ), "_speed" );
 205
 206                         // Determine which speed to use
 207                         double use_speed = first ? speed : this->last_speed;
 208
 209                         // Get changed requests to the preview (focus changes)
 210                         int changed = mlt_properties_get_int( properties, "changed" );
 211
 212                         // Get refresh request for the current frame (effect changes in still mode)
 213                         int refresh = mlt_properties_get_int( properties, "refresh" );
 214
 215                         // Decrement refresh and clear changed
 216                         mlt_properties_set_int( properties, "refresh", refresh > 0 ? refresh - 1 : 0 );
 217                         mlt_properties_set_int( properties, "changed", 0 );
 218
 219                         // Set the changed property on this frame for the benefit of still
 220                         mlt_properties_set_int( mlt_frame_properties( frame ), "refresh", refresh );
 221
 222                         // Make sure the recipient knows that this frame isn't really rendered
 223                         mlt_properties_set_int( mlt_frame_properties( frame ), "rendered", 0 );
 224
 225                         // If we're not the first frame and both consumers are stopped, then stop ourselves
 226                         if ( !first && mlt_consumer_is_stopped( this->play ) && mlt_consumer_is_stopped( this->still ) )
 227                         {
 228                                 this->running = 0;
 229                                 mlt_frame_close( frame );
 230                         }
 231                         // Allow a little grace time before switching consumers on speed changes
 232                         else if ( this->ignore_change -- > 0 && this->active != NULL && !mlt_consumer_is_stopped( this->active ) )
 233                         {
 234                                 mlt_consumer_put_frame( this->active, frame );
 235                                 mlt_properties_set_int( still, "changed", changed );
 236                         }
 237                         // If we aren't playing normally, then use the still
 238                         else if ( use_speed != 1 )
 239                         {
 240                                 if ( !mlt_consumer_is_stopped( this->play ) )
 241                                         mlt_consumer_stop( this->play );
 242                                 if ( mlt_consumer_is_stopped( this->still ) )
 243                                 {
 244                                         this->last_speed = use_speed;
 245                                         this->active = this->still;
 246                                         this->ignore_change = 5;
 247                                         mlt_consumer_start( this->still );
 248                                 }
 249                                 mlt_properties_set_int( still, "changed", changed );
 250                                 mlt_consumer_put_frame( this->still, frame );
 251                         }
 252                         // Otherwise use the normal player
 253                         else
 254                         {
 255                                 if ( !mlt_consumer_is_stopped( this->still ) )
 256                                         mlt_consumer_stop( this->still );
 257                                 if ( mlt_consumer_is_stopped( this->play ) )
 258                                 {
 259                                         this->last_speed = use_speed;
 260                                         this->active = this->play;
 261                                         this->ignore_change = 25;
 262                                         mlt_consumer_start( this->play );
 263                                 }
 264                                 mlt_properties_set_int( still, "changed", changed );
 265                                 mlt_consumer_put_frame( this->play, frame );
 266                         }
 267
 268                         // Copy the rectangle info from the active consumer
 269                         if ( this->running )
 270                         {
 271                                 mlt_properties active = mlt_consumer_properties( this->active );
 272                                 mlt_properties_set_int( properties, "rect_x", mlt_properties_get_int( active, "rect_x" ) );
 273                                 mlt_properties_set_int( properties, "rect_y", mlt_properties_get_int( active, "rect_y" ) );
 274                                 mlt_properties_set_int( properties, "rect_w", mlt_properties_get_int( active, "rect_w" ) );
 275                                 mlt_properties_set_int( properties, "rect_h", mlt_properties_get_int( active, "rect_h" ) );
 276                         }
 277
 278                         // We are definitely not waiting on the first frame any more
 279                         first = 0;
 280                 }
 281         }
 282
 283         mlt_consumer_stop( this->play );
 284         mlt_consumer_stop( this->still );
 285
 286         SDL_Quit( );
 287
 288         return NULL;
 289 }
 290
 291 /** Callback to allow override of the close method.
 292 */
 293
 294 static void consumer_close( mlt_consumer parent )
 295 {
 296         // Get the actual object
 297         consumer_sdl this = parent->child;
 298
 299         // Stop the consumer
 300         mlt_consumer_stop( parent );
 301
 302         // Now clean up the rest
 303         mlt_consumer_close( parent );
 304
 305         // Close the child consumers
 306         mlt_consumer_close( this->play );
 307         mlt_consumer_close( this->still );
 308
 309         // Finally clean up this
 310         free( this );
 311 }