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/timeb.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 * 6 ];
  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 };
  59
  60 /** Forward references to static functions.
  61 */
  62
  63 static int consumer_start( mlt_consumer parent );
  64 static int consumer_stop( mlt_consumer parent );
  65 static int consumer_is_stopped( mlt_consumer parent );
  66 static void consumer_close( mlt_consumer parent );
  67 static void *consumer_thread( void * );
  68 static int consumer_get_dimensions( int *width, int *height );
  69
  70 /** This is what will be called by the factory - anything can be passed in
  71         via the argument, but keep it simple.
  72 */
  73
  74 mlt_consumer consumer_sdl_init( char *arg )
  75 {
  76         // Create the consumer object
  77         consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
  78
  79         // If no malloc'd and consumer init ok
  80         if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
  81         {
  82                 // Create the queue
  83                 this->queue = mlt_deque_init( );
  84
  85                 // Get the parent consumer object
  86                 mlt_consumer parent = &this->parent;
  87
  88                 // We have stuff to clean up, so override the close method
  89                 parent->close = consumer_close;
  90
  91                 // get a handle on properties
  92                 mlt_service service = mlt_consumer_service( parent );
  93                 this->properties = mlt_service_properties( service );
  94
  95                 // Set the default volume
  96                 mlt_properties_set_double( this->properties, "volume", 1.0 );
  97
  98                 // This is the initialisation of the consumer
  99                 pthread_mutex_init( &this->audio_mutex, NULL );
 100                 pthread_cond_init( &this->audio_cond, NULL);
 101
 102                 // Default scaler (for now we'll use nearest)
 103                 mlt_properties_set( this->properties, "rescale", "nearest" );
 104
 105                 // Default progressive true
 106                 mlt_properties_set_int( this->properties, "progressive", 1 );
 107
 108                 // Get aspect ratio
 109                 this->aspect_ratio = mlt_properties_get_double( this->properties, "aspect_ratio" );
 110
 111                 // process actual param
 112                 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
 113                 {
 114                         this->width = mlt_properties_get_int( this->properties, "width" );
 115                         this->height = mlt_properties_get_int( this->properties, "height" );
 116                 }
 117
 118                 // Default window size
 119                 this->window_width = (int)( (float)this->height * this->aspect_ratio ) + 1;
 120                 this->window_height = this->height;
 121
 122                 // Set the sdl flags
 123                 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE;
 124
 125                 // Allow thread to be started/stopped
 126                 parent->start = consumer_start;
 127                 parent->stop = consumer_stop;
 128                 parent->is_stopped = consumer_is_stopped;
 129
 130                 // Return the consumer produced
 131                 return parent;
 132         }
 133
 134         // malloc or consumer init failed
 135         free( this );
 136
 137         // Indicate failure
 138         return NULL;
 139 }
 140
 141 int consumer_start( mlt_consumer parent )
 142 {
 143         consumer_sdl this = parent->child;
 144
 145         if ( !this->running )
 146         {
 147                 this->running = 1;
 148                 pthread_create( &this->thread, NULL, consumer_thread, this );
 149         }
 150
 151         return 0;
 152 }
 153
 154 int consumer_stop( mlt_consumer parent )
 155 {
 156         // Get the actual object
 157         consumer_sdl this = parent->child;
 158
 159         if ( this->running )
 160         {
 161                 // Kill the thread and clean up
 162                 this->running = 0;
 163
 164                 pthread_mutex_lock( &this->audio_mutex );
 165                 pthread_cond_broadcast( &this->audio_cond );
 166                 pthread_mutex_unlock( &this->audio_mutex );
 167
 168                 pthread_join( this->thread, NULL );
 169         }
 170
 171         return 0;
 172 }
 173
 174 int consumer_is_stopped( mlt_consumer parent )
 175 {
 176         consumer_sdl this = parent->child;
 177         return !this->running;
 178 }
 179
 180 static int sdl_lock_display( )
 181 {
 182         SDL_Surface *screen = SDL_GetVideoSurface( );
 183         return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
 184 }
 185
 186 static void sdl_unlock_display( )
 187 {
 188         SDL_Surface *screen = SDL_GetVideoSurface( );
 189         if ( screen != NULL && SDL_MUSTLOCK( screen ) )
 190                 SDL_UnlockSurface( screen );
 191 }
 192
 193 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
 194 {
 195         consumer_sdl this = udata;
 196
 197         // Get the volume
 198         float volume = mlt_properties_get_double( this->properties, "volume" );
 199
 200         pthread_mutex_lock( &this->audio_mutex );
 201
 202         // Block until audio received
 203         while ( this->running && len > this->audio_avail )
 204                 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 205
 206         if ( this->audio_avail >= len )
 207         {
 208                 // Place in the audio buffer
 209                 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 210
 211                 // Remove len from the audio available
 212                 this->audio_avail -= len;
 213
 214                 // Remove the samples
 215                 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
 216         }
 217         else
 218         {
 219                 // Just to be safe, wipe the stream first
 220                 memset( stream, 0, len );
 221
 222                 // Copy what we have into the stream
 223                 memcpy( stream, this->audio_buffer, this->audio_avail );
 224
 225                 // Mix the audio
 226                 SDL_MixAudio( stream, stream, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
 227
 228                 // No audio left
 229                 this->audio_avail = 0;
 230         }
 231
 232         // We're definitely playing now
 233         this->playing = 1;
 234
 235         pthread_cond_broadcast( &this->audio_cond );
 236         pthread_mutex_unlock( &this->audio_mutex );
 237 }
 238
 239 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
 240 {
 241         // Get the properties of this consumer
 242         mlt_properties properties = this->properties;
 243         mlt_audio_format afmt = mlt_audio_pcm;
 244
 245         // Set the preferred params of the test card signal
 246         int channels = 2;
 247         int frequency = 48000;
 248         static int counter = 0;
 249         if ( mlt_properties_get_int( properties, "frequency" ) != 0 )
 250                 frequency =  mlt_properties_get_int( properties, "frequency" );
 251
 252         int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
 253
 254         int16_t *pcm;
 255         int bytes;
 256
 257         mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
 258         *duration = ( ( samples * 1000 ) / frequency );
 259
 260         if ( mlt_properties_get_int( properties, "audio_off" ) )
 261         {
 262                 this->playing = 1;
 263                 return init_audio;
 264         }
 265
 266         if ( init_audio == 1 )
 267         {
 268                 SDL_AudioSpec request;
 269                 SDL_AudioSpec got;
 270
 271                 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
 272                 SDL_EnableUNICODE( 1 );
 273
 274                 // specify audio format
 275                 memset( &request, 0, sizeof( SDL_AudioSpec ) );
 276                 this->playing = 0;
 277                 request.freq = frequency;
 278                 request.format = AUDIO_S16;
 279                 request.channels = channels;
 280                 request.samples = 2048;
 281                 request.callback = sdl_fill_audio;
 282                 request.userdata = (void *)this;
 283                 if ( SDL_OpenAudio( &request, &got ) != 0 )
 284                 {
 285                         fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
 286                         init_audio = 2;
 287                 }
 288                 else if ( got.size != 0 )
 289                 {
 290                         SDL_PauseAudio( 0 );
 291                         init_audio = 0;
 292                 }
 293         }
 294
 295         if ( init_audio == 0 )
 296         {
 297                 bytes = ( samples * channels * 2 );
 298                 pthread_mutex_lock( &this->audio_mutex );
 299                 while ( bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
 300                         pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
 301                 mlt_properties properties = mlt_frame_properties( frame );
 302                 if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
 303                         memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
 304                 else
 305                         memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
 306                 this->audio_avail += bytes;
 307                 pthread_cond_broadcast( &this->audio_cond );
 308                 pthread_mutex_unlock( &this->audio_mutex );
 309         }
 310         else
 311         {
 312                 this->playing = 1;
 313         }
 314
 315         return init_audio;
 316 }
 317
 318 static int consumer_play_video( consumer_sdl this, mlt_frame frame, int64_t elapsed, int skip, int64_t playtime )
 319 {
 320         // Get the properties of this consumer
 321         mlt_properties properties = this->properties;
 322
 323         mlt_image_format vfmt = mlt_image_yuv422;
 324         int width = this->width, height = this->height;
 325         uint8_t *image;
 326         int changed = 0;
 327         int show = 1;
 328
 329         if ( mlt_properties_get_int( properties, "video_off" ) )
 330         {
 331                 mlt_frame_close( frame );
 332                 return 0;
 333         }
 334
 335         // Handle events
 336         if ( this->sdl_screen != NULL )
 337         {
 338                 SDL_Event event;
 339
 340                 changed = consumer_get_dimensions( &this->window_width, &this->window_height );
 341
 342                 while ( SDL_PollEvent( &event ) )
 343                 {
 344                         switch( event.type )
 345                         {
 346                                 case SDL_VIDEORESIZE:
 347                                         this->window_width = event.resize.w;
 348                                         this->window_height = event.resize.h;
 349                                         changed = 1;
 350                                         break;
 351                                 case SDL_KEYDOWN:
 352                                         {
 353                                                 mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
 354                                                 char keyboard[ 2 ] = " ";
 355                                                 void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
 356                                                 if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
 357                                                 {
 358                                                         keyboard[ 0 ] = ( char )event.key.keysym.unicode;
 359                                                         callback( producer, keyboard );
 360                                                 }
 361                                         }
 362                                         break;
 363                         }
 364                 }
 365         }
 366
 367         // Set skip
 368         mlt_properties_set_int( mlt_frame_properties( frame ), "skip", skip );
 369         mlt_properties_set_position( mlt_frame_properties( frame ), "playtime", playtime );
 370
 371         // Push this frame to the back of the queue
 372         mlt_deque_push_back( this->queue, frame );
 373         frame = NULL;
 374
 375         if ( this->playing )
 376         {
 377                 // We might want to use an old frame if the current frame is skipped
 378                 mlt_frame candidate = NULL;
 379
 380                 while ( frame == NULL && mlt_deque_count( this->queue ) )
 381                 {
 382                         frame = mlt_deque_peek_front( this->queue );
 383                         show = !mlt_properties_get_int( mlt_frame_properties( frame ), "skip" );
 384                         playtime = mlt_properties_get_position( mlt_frame_properties( frame ), "playtime" );
 385
 386                         // Check if frame is in the future or past
 387                         if ( !show )
 388                         {
 389                                 frame = mlt_deque_pop_front( this->queue );
 390                                 mlt_frame_close( frame );
 391                                 frame = NULL;
 392                         }
 393                         else if ( playtime > elapsed )
 394                         {
 395                                 // no frame to show or remove
 396                                 frame = NULL;
 397                                 break;
 398                         }
 399                         else if ( playtime < elapsed - 40 )
 400                         {
 401                                 if ( candidate != NULL )
 402                                         mlt_frame_close( candidate );
 403                                 candidate = mlt_deque_pop_front( this->queue );
 404                                 frame = NULL;
 405                         }
 406                         else
 407                         {
 408                                 // Get the frame at the front of the queue
 409                                 frame = mlt_deque_pop_front( this->queue );
 410                         }
 411                 }
 412
 413                 if ( frame == NULL )
 414                         frame = candidate;
 415                 else if ( candidate != NULL )
 416                         mlt_frame_close( candidate );
 417         }
 418
 419         if ( this->playing && frame != NULL )
 420         {
 421                 // Get the image, width and height
 422                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 423
 424                 if ( width != this->width || height != this->height )
 425                 {
 426                         this->width = width;
 427                         this->height = height;
 428                         changed = 1;
 429                 }
 430
 431                 if ( this->sdl_screen == NULL || changed )
 432                 {
 433                         double aspect_ratio = mlt_frame_get_aspect_ratio( frame );
 434                         float display_aspect_ratio = (float)width / (float)height;
 435                         SDL_Rect rect;
 436
 437                         if ( mlt_properties_get_double( properties, "aspect_ratio" ) )
 438                                 aspect_ratio = mlt_properties_get_double( properties, "aspect_ratio" );
 439
 440                         if ( aspect_ratio == 1 )
 441                         {
 442                                 rect.w = this->window_width;
 443                                 rect.h = this->window_height;
 444                         }
 445                         else if ( this->window_width < this->window_height * aspect_ratio )
 446                         {
 447                                 rect.w = this->window_width;
 448                                 rect.h = this->window_width / aspect_ratio;
 449                         }
 450                         else
 451                         {
 452                                 rect.w = this->window_height * aspect_ratio;
 453                                 rect.h = this->window_height;
 454                         }
 455
 456                         if ( mlt_properties_get_int( properties, "scale_overlay" ) )
 457                         {
 458                                 if ( ( float )rect.w * display_aspect_ratio < this->window_width )
 459                                         rect.w = ( int )( ( float )rect.w * display_aspect_ratio );
 460                                 else if ( ( float )rect.h * display_aspect_ratio < this->window_height )
 461                                         rect.h = ( int )( ( float )rect.h * display_aspect_ratio );
 462                         }
 463
 464                         rect.x = ( this->window_width - rect.w ) / 2;
 465                         rect.y = ( this->window_height - rect.h ) / 2;
 466
 467                         // Force an overlay recreation
 468                         if ( this->sdl_overlay != NULL )
 469                                 SDL_FreeYUVOverlay( this->sdl_overlay );
 470
 471                         // open SDL window with video overlay, if possible
 472                         this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
 473
 474                         if ( this->sdl_screen != NULL )
 475                         {
 476                                 SDL_SetClipRect( this->sdl_screen, &rect );
 477
 478                                 sdl_lock_display();
 479                                 this->sdl_overlay = SDL_CreateYUVOverlay( this->width - (this->width % 4), this->height- (this->height % 2 ), SDL_YUY2_OVERLAY, this->sdl_screen );
 480                                 sdl_unlock_display();
 481                         }
 482                 }
 483
 484                 if ( this->sdl_screen != NULL && this->sdl_overlay != NULL )
 485                 {
 486                         this->buffer = this->sdl_overlay->pixels[ 0 ];
 487                         if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
 488                         {
 489                                 memcpy( this->buffer, image, width * height * 2 );
 490                                 SDL_UnlockYUVOverlay( this->sdl_overlay );
 491                                 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
 492                         }
 493                 }
 494         }
 495
 496         // Close the frame
 497         if ( frame != NULL )
 498                 mlt_frame_close( frame );
 499
 500         if ( mlt_deque_count( this->queue ) && !skip )
 501         {
 502                 // Tell the producers about our scale relative to the normalisation
 503                 frame = mlt_deque_peek_front( this->queue );
 504                 mlt_properties_set_double( mlt_frame_properties( frame ), "consumer_scale",
 505                         ( double )height / mlt_properties_get_double( properties, "height" ) );
 506                 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
 507         }
 508
 509         return 0;
 510 }
 511
 512 /** Threaded wrapper for pipe.
 513 */
 514
 515 static void *consumer_thread( void *arg )
 516 {
 517         // Identify the arg
 518         consumer_sdl this = arg;
 519
 520         // Get the consumer
 521         mlt_consumer consumer = &this->parent;
 522
 523         // internal intialization
 524         int init_audio = 1;
 525
 526         // Obtain time of thread start
 527         struct timeb now;
 528         int64_t start = 0;
 529         int64_t elapsed = 0;
 530         int duration = 0;
 531         int64_t playtime = 0;
 532         int skip = 0;
 533
 534         if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_NOPARACHUTE ) < 0 )
 535         {
 536                 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
 537                 return NULL;
 538         }
 539
 540         // Loop until told not to
 541         while( this->running )
 542         {
 543                 // Get a frame from the attached producer
 544                 mlt_frame frame = mlt_consumer_get_frame( consumer );
 545
 546                 // Ensure that we have a frame
 547                 if ( frame != NULL )
 548                 {
 549                         skip = 0;
 550
 551                         // SDL adapts display aspect, but set this so pixel aspect can be normalised
 552 //                      mlt_properties_set_double( mlt_frame_properties( frame ), "consumer_aspect_ratio",
 553 //                              mlt_frame_get_aspect_ratio( frame ) );
 554
 555                         // Play audio
 556                         init_audio = consumer_play_audio( this, frame, init_audio, &duration );
 557
 558                         if ( this->playing )
 559                         {
 560                                 // Get the current time
 561                                 ftime( &now );
 562
 563                                 // Determine elapsed time
 564                                 if ( start == 0 )
 565                                         start = ( int64_t )now.time * 1000 + now.millitm;
 566                                 else
 567                                         elapsed = ( ( int64_t )now.time * 1000 + now.millitm ) - start;
 568
 569                                 skip = playtime < elapsed;
 570
 571                                 if ( skip )
 572                                         start = start + ( elapsed - playtime );
 573                         }
 574
 575                         consumer_play_video( this, frame, elapsed, skip, playtime );
 576
 577                         playtime += duration;
 578                 }
 579         }
 580
 581         // internal cleanup
 582         if ( init_audio == 0 )
 583                 SDL_AudioQuit( );
 584         if ( this->sdl_overlay != NULL )
 585                 SDL_FreeYUVOverlay( this->sdl_overlay );
 586         SDL_Quit( );
 587
 588         while( mlt_deque_count( this->queue ) )
 589                 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
 590
 591         this->sdl_screen = NULL;
 592         this->sdl_overlay = NULL;
 593         this->audio_avail = 0;
 594
 595         return NULL;
 596 }
 597
 598 static int consumer_get_dimensions( int *width, int *height )
 599 {
 600         int changed = 0;
 601
 602         // SDL windows manager structure
 603         SDL_SysWMinfo wm;
 604
 605         // Specify the SDL Version
 606         SDL_VERSION( &wm.version );
 607
 608         // Get the wm structure
 609         if ( SDL_GetWMInfo( &wm ) == 1 )
 610         {
 611                 // Check that we have the X11 wm
 612                 if ( wm.subsystem == SDL_SYSWM_X11 )
 613                 {
 614                         // Get the SDL window
 615                         Window window = wm.info.x11.window;
 616
 617                         // Get the display session
 618                         Display *display = wm.info.x11.display;
 619
 620                         // Get the window attributes
 621                         XWindowAttributes attr;
 622                         XGetWindowAttributes( display, window, &attr );
 623
 624                         // Determine whether window has changed
 625                         changed = *width != attr.width || *height != attr.height;
 626
 627                         // Return width and height
 628                         *width = attr.width;
 629                         *height = attr.height;
 630                 }
 631         }
 632
 633         return changed;
 634 }
 635
 636 /** Callback to allow override of the close method.
 637 */
 638
 639 static void consumer_close( mlt_consumer parent )
 640 {
 641         // Get the actual object
 642         consumer_sdl this = parent->child;
 643
 644         // Stop the consumer
 645         mlt_consumer_stop( parent );
 646
 647         // Destroy mutexes
 648         pthread_mutex_destroy( &this->audio_mutex );
 649         pthread_cond_destroy( &this->audio_cond );
 650
 651         // Now clean up the rest
 652         mlt_consumer_close( parent );
 653
 654         // Finally clean up this
 655         free( this );
 656 }
 657