git.sesse.net Git - mlt/blob - src/modules/sdl/consumer_sdl.c

   1 /*
   2  * consumer_sdl.c -- A Simple DirectMedia Layer consumer
   3  * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
   4  * Author: Dan Dennedy <dan@dennedy.org>
   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_deque.h>
  24 #include <stdio.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 #include <sys/time.h>
  31
  32 /** This classes definition.
  33 */
  34
  35 typedef struct consumer_sdl_s *consumer_sdl;
  36
  37 struct consumer_sdl_s
  38 {
  39         struct mlt_consumer_s parent;
  40         mlt_properties properties;
  41         mlt_deque queue;
  42         pthread_t thread;
  43         int running;
  44         uint8_t audio_buffer[ 4096 * 19 ];
  45         int audio_avail;
  46         pthread_mutex_t audio_mutex;
  47         pthread_cond_t audio_cond;
  48         int window_width;
  49         int window_height;
  50         float aspect_ratio;
  51         int width;
  52         int height;
  53         int playing;
  54         int sdl_flags;
  55         SDL_Surface *sdl_screen;
  56         SDL_Overlay *sdl_overlay;
  57         uint8_t *buffer;
  58         int time_taken;
  59 };
  60
  61 /** Forward references to static functions.
  62 */
  63
  64 static int consumer_start( mlt_consumer parent );
  65 static int consumer_stop( mlt_consumer parent );
  66 static int consumer_is_stopped( mlt_consumer parent );
  67 static void consumer_close( mlt_consumer parent );
  68 static void *consumer_thread( void * );
  69 static int consumer_get_dimensions( int *width, int *height );
  70
  71 /** This is what will be called by the factory - anything can be passed in
  72         via the argument, but keep it simple.
  73 */
  74
  75 mlt_consumer consumer_sdl_init( char *arg )
  76 {
  77         // Create the consumer object
  78         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  79
  80         // If no malloc'd and consumer init ok
  81         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
  82         {
  83                 // Create the queue
  84                 this->queue = mlt_deque_init( );
  85
  86                 // Get the parent consumer object
  87                 mlt_consumer parent = &this->parent;
  88
  89                 // We have stuff to clean up, so override the close method
  90                 parent->close = consumer_close;
  91
  92                 // get a handle on properties
  93                 mlt_service service = mlt_consumer_service( parent );
  94                 this->properties = mlt_service_properties( service );
  95
  96                 // Set the default volume
  97                 mlt_properties_set_double( this->properties, "volume", 1.0 );
  98
  99                 // This is the initialisation of the consumer
 100                 pthread_mutex_init( &this->audio_mutex, NULL );
 101                 pthread_cond_init( &this->audio_cond, NULL);
 102
 103                 // Default scaler (for now we'll use nearest)
 104                 mlt_properties_set( this->properties, "rescale", "nearest" );
 105
 106                 // Default buffer for low latency
 107                 mlt_properties_set_int( this->properties, "buffer", 8 );
 108
 109                 // Default progressive true
 110                 mlt_properties_set_int( this->properties, "progressive", 1 );
 111
 112                 // Get aspect ratio
 113                 this->aspect_ratio = mlt_properties_get_double( this->properties, "aspect_ratio" );
 114
 115                 // process actual param
 116                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 117                 {
 118                         this->width = mlt_properties_get_int( this->properties, "width" );
 119                         this->height = mlt_properties_get_int( this->properties, "height" );
 120                 }
 121
 122                 // Default window size
 123                 this->window_width = (int)( (float)this->height * 4.0/3.0 + 0.5);
 124                 this->window_height = this->height;
 125
 126                 // Set the sdl flags
 127                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE;
 128
 129                 // Allow thread to be started/stopped
 130                 parent->start = consumer_start;
 131                 parent->stop = consumer_stop;
 132                 parent->is_stopped = consumer_is_stopped;
 133
 134                 // Return the consumer produced
 135                 return parent;
 136         }
 137
 138         // malloc or consumer init failed
 139         free( this );
 140
 141         // Indicate failure
 142         return NULL;
 143 }
 144
 145 int consumer_start( mlt_consumer parent )
 146 {
 147         consumer_sdl this = parent->child;
 148
 149         if ( !this->running )
 150         {
 151                 this->running = 1;
 152                 pthread_create( &this->thread, NULL, consumer_thread, this );
 153         }
 154
 155         return 0;
 156 }
 157
 158 int consumer_stop( mlt_consumer parent )
 159 {
 160         // Get the actual object
 161         consumer_sdl this = parent->child;
 162
 163         if ( this->running )
 164         {
 165                 // Kill the thread and clean up
 166                 this->running = 0;
 167
 168                 pthread_mutex_lock( &this->audio_mutex );
 169                 pthread_cond_broadcast( &this->audio_cond );
 170                 pthread_mutex_unlock( &this->audio_mutex );
 171
 172                 pthread_join( this->thread, NULL );
 173         }
 174
 175         return 0;
 176 }
 177
 178 int consumer_is_stopped( mlt_consumer parent )
 179 {
 180         consumer_sdl this = parent->child;
 181         return !this->running;
 182 }
 183
 184 static int sdl_lock_display( )
 185 {
 186         SDL_Surface *screen = SDL_GetVideoSurface( );
 187         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 188 }
 189
 190 static void sdl_unlock_display( )
 191 {
 192         SDL_Surface *screen = SDL_GetVideoSurface( );
 193         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 194                 SDL_UnlockSurface( screen );
 195 }
 196
 197 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 198 {
 199         consumer_sdl this = udata;
 200
 201         // Get the volume
 202         float volume = mlt_properties_get_double( this->properties, "volume" );
 203
 204         pthread_mutex_lock( &this->audio_mutex );
 205
 206         // Block until audio received
 207         while ( this->running && len > this->audio_avail )
 208                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 209
 210         if ( this->audio_avail >= len )
 211         {
 212                 // Place in the audio buffer
 213                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 214
 215                 // Remove len from the audio available
 216                 this->audio_avail -= len;
 217
 218                 // Remove the samples
 219                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 220         }
 221         else
 222         {
 223                 // Just to be safe, wipe the stream first
 224                 memset( stream, 0, len );
 225
 226                 // Copy what we have into the stream
 227                 memcpy( stream, this->audio_buffer, this->audio_avail );
 228
 229                 // Mix the audio
 230                 SDL_MixAudio( stream, stream, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 231
 232                 // No audio left
 233                 this->audio_avail = 0;
 234         }
 235
 236         // We're definitely playing now
 237         this->playing = 1;
 238
 239         pthread_cond_broadcast( &this->audio_cond );
 240         pthread_mutex_unlock( &this->audio_mutex );
 241 }
 242
 243 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 244 {
 245         // Get the properties of this consumer
 246         mlt_properties properties = this->properties;
 247         mlt_audio_format afmt = mlt_audio_pcm;
 248
 249         // Set the preferred params of the test card signal
 250         int channels = 2;
 251         int frequency = 48000;
 252         static int counter = 0;
 253         if ( mlt_properties_get_int( properties, "frequency" ) != 0 )
 254                 frequency =  mlt_properties_get_int( properties, "frequency" );
 255
 256         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 257
 258         int16_t *pcm;
 259         int bytes;
 260
 261         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 262         *duration = ( ( samples * 1000 ) / frequency );
 263
 264         if ( mlt_properties_get_int( properties, "audio_off" ) )
 265         {
 266                 this->playing = 1;
 267                 return init_audio;
 268         }
 269
 270         if ( init_audio == 1 )
 271         {
 272                 SDL_AudioSpec request;
 273                 SDL_AudioSpec got;
 274
 275                 // specify audio format
 276                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 277                 this->playing = 0;
 278                 request.freq = frequency;
 279                 request.format = AUDIO_S16;
 280                 request.channels = channels;
 281                 request.samples = 4096;
 282                 request.callback = sdl_fill_audio;
 283                 request.userdata = (void *)this;
 284                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 285                 {
 286                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 287                         init_audio = 2;
 288                 }
 289                 else if ( got.size != 0 )
 290                 {
 291                         SDL_PauseAudio( 0 );
 292                         init_audio = 0;
 293                 }
 294         }
 295
 296         if ( init_audio == 0 )
 297         {
 298                 bytes = ( samples * channels * 2 );
 299                 pthread_mutex_lock( &this->audio_mutex );
 300                 while ( bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 301                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 302                 mlt_properties properties = mlt_frame_properties( frame );
 303                 if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 304                         memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 305                 else
 306                         memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 307                 this->audio_avail += bytes;
 308                 pthread_cond_broadcast( &this->audio_cond );
 309                 pthread_mutex_unlock( &this->audio_mutex );
 310         }
 311         else
 312         {
 313                 this->playing = 1;
 314         }
 315
 316         return init_audio;
 317 }
 318
 319 static int consumer_play_video( consumer_sdl this, mlt_frame frame, int64_t elapsed, int64_t playtime )
 320 {
 321         // Get the properties of this consumer
 322         mlt_properties properties = this->properties;
 323
 324         mlt_image_format vfmt = mlt_image_yuv422;
 325         int width = this->width, height = this->height;
 326         uint8_t *image;
 327         int changed = 0;
 328
 329         if ( mlt_properties_get_int( properties, "video_off" ) )
 330         {
 331                 mlt_frame_close( frame );
 332                 return 0;
 333         }
 334
 335         // Set skip
 336         mlt_properties_set_position( mlt_frame_properties( frame ), "playtime", playtime );
 337
 338         // Push this frame to the back of the queue
 339         mlt_deque_push_back( this->queue, frame );
 340         frame = NULL;
 341
 342         if ( this->playing )
 343                 frame = mlt_deque_pop_front( this->queue );
 344
 345         if ( this->playing && frame != NULL && mlt_properties_get_int( mlt_frame_properties( frame ), "rendered" ) == 1 )
 346         {
 347                 playtime = mlt_properties_get_position( mlt_frame_properties( frame ), "playtime" );
 348
 349                 // Get the image, width and height
 350                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 351
 352                 if ( playtime > elapsed + 25000 )
 353                 {
 354                         struct timespec tm = { ( playtime - elapsed ) / 1000000, ( ( playtime - elapsed ) % 1000000 ) * 1000 };
 355                         nanosleep( &tm, NULL );
 356                 }
 357
 358                 // Handle events
 359                 if ( this->sdl_screen != NULL )
 360                 {
 361                         SDL_Event event;
 362
 363                         changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 364
 365                         while ( SDL_PollEvent( &event ) )
 366                         {
 367                                 switch( event.type )
 368                                 {
 369                                         case SDL_VIDEORESIZE:
 370                                                 this->window_width = event.resize.w;
 371                                                 this->window_height = event.resize.h;
 372                                                 changed = 1;
 373                                                 break;
 374                                         case SDL_KEYDOWN:
 375                                                 {
 376                                                         mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 377                                                         char keyboard[ 2 ] = " ";
 378                                                         void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 379                                                         if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 380                                                         {
 381                                                                 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 382                                                                 callback( producer, keyboard );
 383                                                         }
 384                                                 }
 385                                                 break;
 386                                 }
 387                         }
 388                 }
 389
 390                 if ( width != this->width || height != this->height )
 391                 {
 392                         this->width = width;
 393                         this->height = height;
 394                         changed = 1;
 395                 }
 396
 397                 if ( this->sdl_screen == NULL || changed )
 398                 {
 399                         double aspect_ratio = ( float )this->aspect_ratio * this->width / this->height;
 400                         float display_aspect_ratio = ( float )width / height;
 401                         SDL_Rect rect;
 402                         if ( mlt_properties_get( properties, "rescale" ) != NULL &&
 403                                         !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
 404                                 aspect_ratio = mlt_frame_get_aspect_ratio( frame ) * mlt_properties_get_int(mlt_frame_properties(frame),"width") / mlt_properties_get_int(mlt_frame_properties(frame),"height");
 405
 406                         if ( aspect_ratio == 1 )
 407                         {
 408                                 rect.w = this->window_width;
 409                                 rect.h = this->window_height;
 410                         }
 411                         else if ( this->window_width < this->window_height * aspect_ratio )
 412                         {
 413                                 rect.w = this->window_width;
 414                                 rect.h = this->window_width / aspect_ratio + 1;
 415                         }
 416                         else
 417                         {
 418                                 rect.w = this->window_height * aspect_ratio + 1;
 419                                 rect.h = this->window_height;
 420                         }
 421
 422                         if ( mlt_properties_get_int( properties, "scale_overlay" ) )
 423                         {
 424                                 if ( ( float )rect.w * display_aspect_ratio < this->window_width )
 425                                         rect.w = ( int )( ( float )rect.w * display_aspect_ratio );
 426                                 else if ( ( float )rect.h * display_aspect_ratio < this->window_height )
 427                                         rect.h = ( int )( ( float )rect.h * display_aspect_ratio );
 428                         }
 429
 430                         rect.x = ( this->window_width - rect.w ) / 2;
 431                         rect.y = ( this->window_height - rect.h ) / 2;
 432
 433                         // Force an overlay recreation
 434                         if ( this->sdl_overlay != NULL )
 435                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 436
 437                         // open SDL window with video overlay, if possible
 438                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 439
 440                         if ( this->sdl_screen != NULL )
 441                         {
 442                                 SDL_SetClipRect( this->sdl_screen, &rect );
 443
 444                                 sdl_lock_display();
 445                                 this->sdl_overlay = SDL_CreateYUVOverlay( this->width - (this->width % 4), this->height- (this->height % 2 ), SDL_YUY2_OVERLAY, this->sdl_screen );
 446                                 sdl_unlock_display();
 447                         }
 448                 }
 449
 450                 if ( this->sdl_screen != NULL && this->sdl_overlay != NULL )
 451                 {
 452                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 453                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 454                         {
 455                                 memcpy( this->buffer, image, width * height * 2 );
 456                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 457                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 458                         }
 459                 }
 460         }
 461
 462         // Close the frame
 463         if ( frame != NULL )
 464                 mlt_frame_close( frame );
 465
 466         return 0;
 467 }
 468
 469 /** Threaded wrapper for pipe.
 470 */
 471
 472 static void *consumer_thread( void *arg )
 473 {
 474         // Identify the arg
 475         consumer_sdl this = arg;
 476
 477         // Get the consumer
 478         mlt_consumer consumer = &this->parent;
 479
 480         // internal intialization
 481         int init_audio = 1;
 482
 483         // Obtain time of thread start
 484         struct timeval now;
 485         int64_t start = 0;
 486         int64_t elapsed = 0;
 487         int duration = 0;
 488         int64_t playtime = 0;
 489
 490         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_NOPARACHUTE ) < 0 )
 491         {
 492                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 493                 return NULL;
 494         }
 495
 496         SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 497         SDL_EnableUNICODE( 1 );
 498
 499         // Loop until told not to
 500         while( this->running )
 501         {
 502                 // Get a frame from the attached producer
 503                 mlt_frame frame = mlt_consumer_rt_frame( consumer );
 504
 505                 // Ensure that we have a frame
 506                 if ( frame != NULL )
 507                 {
 508                         // Play audio
 509                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 510
 511                         if ( this->playing )
 512                         {
 513                                 // Get the current time
 514                                 gettimeofday( &now, NULL );
 515
 516                                 // Determine elapsed time
 517                                 if ( start == 0 )
 518                                         start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
 519                                 else
 520                                         elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec) - start;
 521
 522                         }
 523
 524                         consumer_play_video( this, frame, elapsed, playtime );
 525
 526                         playtime += ( duration * 1000 );
 527                 }
 528         }
 529
 530         // internal cleanup
 531         if ( init_audio == 0 )
 532                 SDL_AudioQuit( );
 533         if ( this->sdl_overlay != NULL )
 534                 SDL_FreeYUVOverlay( this->sdl_overlay );
 535         SDL_Quit( );
 536
 537         while( mlt_deque_count( this->queue ) )
 538                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 539
 540         this->sdl_screen = NULL;
 541         this->sdl_overlay = NULL;
 542         this->audio_avail = 0;
 543
 544         return NULL;
 545 }
 546
 547 static int consumer_get_dimensions( int *width, int *height )
 548 {
 549         int changed = 0;
 550
 551         // SDL windows manager structure
 552         SDL_SysWMinfo wm;
 553
 554         // Specify the SDL Version
 555         SDL_VERSION( &wm.version );
 556
 557         // Get the wm structure
 558         if ( SDL_GetWMInfo( &wm ) == 1 )
 559         {
 560                 // Check that we have the X11 wm
 561                 if ( wm.subsystem == SDL_SYSWM_X11 )
 562                 {
 563                         // Get the SDL window
 564                         Window window = wm.info.x11.window;
 565
 566                         // Get the display session
 567                         Display *display = wm.info.x11.display;
 568
 569                         // Get the window attributes
 570                         XWindowAttributes attr;
 571                         XGetWindowAttributes( display, window, &attr );
 572
 573                         // Determine whether window has changed
 574                         changed = *width != attr.width || *height != attr.height;
 575
 576                         // Return width and height
 577                         *width = attr.width;
 578                         *height = attr.height;
 579                 }
 580         }
 581
 582         return changed;
 583 }
 584
 585 /** Callback to allow override of the close method.
 586 */
 587
 588 static void consumer_close( mlt_consumer parent )
 589 {
 590         // Get the actual object
 591         consumer_sdl this = parent->child;
 592
 593         // Stop the consumer
 594         mlt_consumer_stop( parent );
 595
 596         // Destroy mutexes
 597         pthread_mutex_destroy( &this->audio_mutex );
 598         pthread_cond_destroy( &this->audio_cond );
 599
 600         // Now clean up the rest
 601         mlt_consumer_close( parent );
 602
 603         // Finally clean up this
 604         free( this );
 605 }