2 * consumer_sdl.c -- A Simple DirectMedia Layer consumer
3 * Copyright (C) 2003-2004 Ushodaya Enterprises Limited
4 * Author: Dan Dennedy <dan@dennedy.org>
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.
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.
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.
21 #include "consumer_sdl.h"
22 #include <framework/mlt_frame.h>
23 #include <framework/mlt_deque.h>
29 #include <SDL/SDL_syswm.h>
32 /** This classes definition.
35 typedef struct consumer_sdl_s *consumer_sdl;
39 struct mlt_consumer_s parent;
40 mlt_properties properties;
44 uint8_t audio_buffer[ 4096 * 19 ];
46 pthread_mutex_t audio_mutex;
47 pthread_cond_t audio_cond;
55 SDL_Surface *sdl_screen;
56 SDL_Overlay *sdl_overlay;
60 /** Forward references to static functions.
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 );
70 /** This is what will be called by the factory - anything can be passed in
71 via the argument, but keep it simple.
74 mlt_consumer consumer_sdl_init( char *arg )
76 // Create the consumer object
77 consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
79 // If no malloc'd and consumer init ok
80 if ( this != NULL && mlt_consumer_init( &this->parent, this ) == 0 )
83 this->queue = mlt_deque_init( );
85 // Get the parent consumer object
86 mlt_consumer parent = &this->parent;
88 // We have stuff to clean up, so override the close method
89 parent->close = consumer_close;
91 // get a handle on properties
92 mlt_service service = mlt_consumer_service( parent );
93 this->properties = mlt_service_properties( service );
95 // Set the default volume
96 mlt_properties_set_double( this->properties, "volume", 1.0 );
98 // This is the initialisation of the consumer
99 pthread_mutex_init( &this->audio_mutex, NULL );
100 pthread_cond_init( &this->audio_cond, NULL);
102 // Default scaler (for now we'll use nearest)
103 mlt_properties_set( this->properties, "rescale", "nearest" );
105 // Default buffer for low latency
106 mlt_properties_set_int( this->properties, "buffer", 8 );
108 // Default progressive true
109 mlt_properties_set_int( this->properties, "progressive", 0 );
112 this->aspect_ratio = mlt_properties_get_double( this->properties, "aspect_ratio" );
114 // process actual param
115 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
117 this->width = mlt_properties_get_int( this->properties, "width" );
118 this->height = mlt_properties_get_int( this->properties, "height" );
121 // Default window size
122 this->window_width = (int)( (float)this->height * 4.0/3.0 + 0.5);
123 this->window_height = this->height;
126 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE;
128 // Allow thread to be started/stopped
129 parent->start = consumer_start;
130 parent->stop = consumer_stop;
131 parent->is_stopped = consumer_is_stopped;
133 // Return the consumer produced
137 // malloc or consumer init failed
144 int consumer_start( mlt_consumer parent )
146 consumer_sdl this = parent->child;
148 if ( !this->running )
151 pthread_create( &this->thread, NULL, consumer_thread, this );
157 int consumer_stop( mlt_consumer parent )
159 // Get the actual object
160 consumer_sdl this = parent->child;
164 // Kill the thread and clean up
167 pthread_mutex_lock( &this->audio_mutex );
168 pthread_cond_broadcast( &this->audio_cond );
169 pthread_mutex_unlock( &this->audio_mutex );
171 pthread_join( this->thread, NULL );
177 int consumer_is_stopped( mlt_consumer parent )
179 consumer_sdl this = parent->child;
180 return !this->running;
183 static int sdl_lock_display( )
185 SDL_Surface *screen = SDL_GetVideoSurface( );
186 return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
189 static void sdl_unlock_display( )
191 SDL_Surface *screen = SDL_GetVideoSurface( );
192 if ( screen != NULL && SDL_MUSTLOCK( screen ) )
193 SDL_UnlockSurface( screen );
196 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
198 consumer_sdl this = udata;
201 float volume = mlt_properties_get_double( this->properties, "volume" );
203 pthread_mutex_lock( &this->audio_mutex );
205 // Block until audio received
206 while ( this->running && len > this->audio_avail )
207 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
209 if ( this->audio_avail >= len )
211 // Place in the audio buffer
212 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
214 // Remove len from the audio available
215 this->audio_avail -= len;
217 // Remove the samples
218 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
222 // Just to be safe, wipe the stream first
223 memset( stream, 0, len );
225 // Copy what we have into the stream
226 memcpy( stream, this->audio_buffer, this->audio_avail );
229 SDL_MixAudio( stream, stream, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
232 this->audio_avail = 0;
235 // We're definitely playing now
238 pthread_cond_broadcast( &this->audio_cond );
239 pthread_mutex_unlock( &this->audio_mutex );
242 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
244 // Get the properties of this consumer
245 mlt_properties properties = this->properties;
246 mlt_audio_format afmt = mlt_audio_pcm;
248 // Set the preferred params of the test card signal
250 int frequency = 48000;
251 static int counter = 0;
252 if ( mlt_properties_get_int( properties, "frequency" ) != 0 )
253 frequency = mlt_properties_get_int( properties, "frequency" );
255 int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
260 mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
261 *duration = ( ( samples * 1000 ) / frequency );
263 if ( mlt_properties_get_int( properties, "audio_off" ) )
270 if ( init_audio == 1 )
272 SDL_AudioSpec request;
275 // specify audio format
276 memset( &request, 0, sizeof( SDL_AudioSpec ) );
278 request.freq = frequency;
279 request.format = AUDIO_S16;
280 request.channels = channels;
281 request.samples = 1024;
282 request.callback = sdl_fill_audio;
283 request.userdata = (void *)this;
284 if ( SDL_OpenAudio( &request, &got ) != 0 )
286 fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
289 else if ( got.size != 0 )
296 if ( init_audio == 0 )
298 mlt_properties properties = mlt_frame_properties( frame );
299 bytes = ( samples * channels * 2 );
300 pthread_mutex_lock( &this->audio_mutex );
301 while ( bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
302 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
303 if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
304 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
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 );
319 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
321 // Get the properties of this consumer
322 mlt_properties properties = this->properties;
324 mlt_image_format vfmt = mlt_image_yuv422;
325 int width = this->width, height = this->height;
329 if ( mlt_properties_get_int( properties, "video_off" ) == 0 )
331 // Get the image, width and height
332 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
335 if ( this->sdl_screen != NULL )
339 changed = consumer_get_dimensions( &this->window_width, &this->window_height );
341 while ( SDL_PollEvent( &event ) )
345 case SDL_VIDEORESIZE:
346 this->window_width = event.resize.w;
347 this->window_height = event.resize.h;
352 mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
353 char keyboard[ 2 ] = " ";
354 void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
355 if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
357 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
358 callback( producer, keyboard );
366 if ( width != this->width || height != this->height )
369 this->height = height;
373 if ( this->sdl_screen == NULL || changed )
375 double aspect_ratio = ( float )this->aspect_ratio * this->width / this->height;
376 float display_aspect_ratio = ( float )width / height;
378 if ( mlt_properties_get( properties, "rescale" ) != NULL &&
379 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
380 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");
382 if ( aspect_ratio == 1 )
384 rect.w = this->window_width;
385 rect.h = this->window_height;
387 else if ( this->window_width < this->window_height * aspect_ratio )
389 rect.w = this->window_width;
390 rect.h = this->window_width / aspect_ratio + 1;
394 rect.w = this->window_height * aspect_ratio + 1;
395 rect.h = this->window_height;
398 if ( mlt_properties_get_int( properties, "scale_overlay" ) )
400 if ( ( float )rect.w * display_aspect_ratio < this->window_width )
401 rect.w = ( int )( ( float )rect.w * display_aspect_ratio );
402 else if ( ( float )rect.h * display_aspect_ratio < this->window_height )
403 rect.h = ( int )( ( float )rect.h * display_aspect_ratio );
406 rect.x = ( this->window_width - rect.w ) / 2;
407 rect.y = ( this->window_height - rect.h ) / 2;
409 // Force an overlay recreation
410 if ( this->sdl_overlay != NULL )
411 SDL_FreeYUVOverlay( this->sdl_overlay );
413 // open SDL window with video overlay, if possible
414 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
416 if ( this->sdl_screen != NULL )
418 SDL_SetClipRect( this->sdl_screen, &rect );
421 this->sdl_overlay = SDL_CreateYUVOverlay( this->width - (this->width % 4), this->height- (this->height % 2 ), SDL_YUY2_OVERLAY, this->sdl_screen );
422 sdl_unlock_display();
426 if ( this->sdl_screen != NULL && this->sdl_overlay != NULL )
428 this->buffer = this->sdl_overlay->pixels[ 0 ];
429 if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
431 memcpy( this->buffer, image, width * height * 2 );
432 SDL_UnlockYUVOverlay( this->sdl_overlay );
433 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
439 mlt_frame_close( frame );
444 /** Threaded wrapper for pipe.
447 static void *consumer_thread( void *arg )
450 consumer_sdl this = arg;
453 mlt_consumer consumer = &this->parent;
455 // internal intialization
458 // Obtain time of thread start
463 int64_t playtime = 0;
465 mlt_frame next = NULL;
466 mlt_frame frame = NULL;
468 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_INIT_NOPARACHUTE ) < 0 )
470 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
474 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
475 SDL_EnableUNICODE( 1 );
477 // Loop until told not to
478 while( this->running )
480 // Get a frame from the attached producer
481 frame = mlt_consumer_rt_frame( consumer );
483 // Ensure that we have a frame
487 init_audio = consumer_play_audio( this, frame, init_audio, &duration );
491 // Get the current time
492 gettimeofday( &now, NULL );
494 // Determine elapsed time
496 start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
498 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec) - start;
501 // Set playtime for this frame
502 mlt_properties_set_position( mlt_frame_properties( frame ), "playtime", playtime );
504 // Push this frame to the back of the queue
505 mlt_deque_push_back( this->queue, frame );
507 // Calculate the next playtime
508 playtime += ( duration * 1000 );
513 // Pop the next frame
514 next = mlt_deque_pop_front( this->queue );
516 // See if we have to delay the display of the current frame
517 if ( next != NULL && mlt_properties_get_int( mlt_frame_properties( next ), "rendered" ) == 1 )
519 mlt_position scheduled = mlt_properties_get_position( mlt_frame_properties( next ), "playtime" ) + 5000;
520 if ( scheduled > elapsed && mlt_deque_count( this->queue ) > 25 )
522 tm.tv_sec = ( scheduled - elapsed ) / 1000000;
523 tm.tv_nsec = ( ( scheduled - elapsed ) % 1000000 ) * 1000;
524 nanosleep( &tm, NULL );
526 // Show current frame
527 consumer_play_video( this, next );
529 else if ( scheduled > elapsed )
532 mlt_deque_push_front( this->queue, next );
536 // Show current frame
537 consumer_play_video( this, next );
542 // This is an unrendered frame - just close it
543 mlt_frame_close( next );
549 if ( init_audio == 0 )
551 if ( this->sdl_overlay != NULL )
552 SDL_FreeYUVOverlay( this->sdl_overlay );
555 while( mlt_deque_count( this->queue ) )
556 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
558 this->sdl_screen = NULL;
559 this->sdl_overlay = NULL;
560 this->audio_avail = 0;
565 static int consumer_get_dimensions( int *width, int *height )
569 // SDL windows manager structure
572 // Specify the SDL Version
573 SDL_VERSION( &wm.version );
575 // Get the wm structure
576 if ( SDL_GetWMInfo( &wm ) == 1 )
578 // Check that we have the X11 wm
579 if ( wm.subsystem == SDL_SYSWM_X11 )
581 // Get the SDL window
582 Window window = wm.info.x11.window;
584 // Get the display session
585 Display *display = wm.info.x11.display;
587 // Get the window attributes
588 XWindowAttributes attr;
589 XGetWindowAttributes( display, window, &attr );
591 // Determine whether window has changed
592 changed = *width != attr.width || *height != attr.height;
594 // Return width and height
596 *height = attr.height;
603 /** Callback to allow override of the close method.
606 static void consumer_close( mlt_consumer parent )
608 // Get the actual object
609 consumer_sdl this = parent->child;
612 mlt_consumer_stop( parent );
615 pthread_mutex_destroy( &this->audio_mutex );
616 pthread_cond_destroy( &this->audio_cond );
618 // Now clean up the rest
619 mlt_consumer_close( parent );
621 // Finally clean up this