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 library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library 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 GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <framework/mlt_consumer.h>
22 #include <framework/mlt_frame.h>
23 #include <framework/mlt_deque.h>
24 #include <framework/mlt_factory.h>
25 #include <framework/mlt_filter.h>
31 #include <SDL/SDL_syswm.h>
34 /** This classes definition.
37 typedef struct consumer_sdl_s *consumer_sdl;
41 struct mlt_consumer_s parent;
42 mlt_properties properties;
47 uint8_t audio_buffer[ 4096 * 10 ];
49 pthread_mutex_t audio_mutex;
50 pthread_cond_t audio_cond;
51 pthread_mutex_t video_mutex;
52 pthread_cond_t video_cond;
61 SDL_Surface *sdl_screen;
62 SDL_Overlay *sdl_overlay;
69 /** Forward references to static functions.
72 static int consumer_start( mlt_consumer parent );
73 static int consumer_stop( mlt_consumer parent );
74 static int consumer_is_stopped( mlt_consumer parent );
75 static void consumer_close( mlt_consumer parent );
76 static void *consumer_thread( void * );
77 static int consumer_get_dimensions( int *width, int *height );
78 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
80 /** This is what will be called by the factory - anything can be passed in
81 via the argument, but keep it simple.
84 mlt_consumer consumer_sdl_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
86 // Create the consumer object
87 consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
89 // If no malloc'd and consumer init ok
90 if ( this != NULL && mlt_consumer_init( &this->parent, this, profile ) == 0 )
93 this->queue = mlt_deque_init( );
95 // Get the parent consumer object
96 mlt_consumer parent = &this->parent;
98 // We have stuff to clean up, so override the close method
99 parent->close = consumer_close;
101 // get a handle on properties
102 mlt_service service = MLT_CONSUMER_SERVICE( parent );
103 this->properties = MLT_SERVICE_PROPERTIES( service );
105 // Set the default volume
106 mlt_properties_set_double( this->properties, "volume", 1.0 );
108 // This is the initialisation of the consumer
109 pthread_mutex_init( &this->audio_mutex, NULL );
110 pthread_cond_init( &this->audio_cond, NULL);
111 pthread_mutex_init( &this->video_mutex, NULL );
112 pthread_cond_init( &this->video_cond, NULL);
114 // Default scaler (for now we'll use nearest)
115 mlt_properties_set( this->properties, "rescale", "nearest" );
117 // Default buffer for low latency
118 mlt_properties_set_int( this->properties, "buffer", 1 );
120 // Default progressive true
121 mlt_properties_set_int( this->properties, "progressive", 0 );
123 // Default audio buffer
124 mlt_properties_set_int( this->properties, "audio_buffer", 512 );
126 // Ensure we don't join on a non-running object
129 // process actual param
130 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
132 this->width = mlt_properties_get_int( this->properties, "width" );
133 this->height = mlt_properties_get_int( this->properties, "height" );
137 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
139 // Allow thread to be started/stopped
140 parent->start = consumer_start;
141 parent->stop = consumer_stop;
142 parent->is_stopped = consumer_is_stopped;
144 // Register specific events
145 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
147 // Return the consumer produced
151 // malloc or consumer init failed
158 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
160 if ( listener != NULL )
161 listener( owner, this, ( SDL_Event * )args[ 0 ] );
164 int consumer_start( mlt_consumer parent )
166 consumer_sdl this = parent->child;
168 if ( !this->running )
170 int video_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "video_off" );
171 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
172 int display_off = video_off | preview_off;
173 int audio_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" );
174 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
176 consumer_stop( parent );
181 if ( mlt_properties_get_int( this->properties, "width" ) > 0 )
182 this->width = mlt_properties_get_int( this->properties, "width" );
183 if ( mlt_properties_get_int( this->properties, "height" ) > 0 )
184 this->height = mlt_properties_get_int( this->properties, "height" );
186 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
188 // Attach a colour space converter
189 if ( preview_off && !this->filtered )
191 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( parent ) );
192 mlt_filter filter = mlt_factory_filter( profile, "avcolour_space", NULL );
195 mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "forced", mlt_image_yuv422 );
196 mlt_service_attach( MLT_CONSUMER_SERVICE( parent ), filter );
197 mlt_filter_close( filter );
202 if ( sdl_started == 0 && display_off == 0 )
204 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
206 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
210 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
211 SDL_EnableUNICODE( 1 );
213 else if ( display_off == 0 )
215 this->sdl_screen = SDL_GetVideoSurface( );
218 if ( audio_off == 0 )
219 SDL_InitSubSystem( SDL_INIT_AUDIO );
221 // Default window size
222 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
223 this->window_width = ( double )this->height * display_ratio;
224 this->window_height = this->height;
226 if ( this->sdl_screen == NULL && display_off == 0 )
228 if ( mlt_properties_get_int( this->properties, "fullscreen" ) )
230 const SDL_VideoInfo *vi = SDL_GetVideoInfo();
231 this->window_width = vi->current_w;
232 this->window_height = vi->current_h;
233 this->sdl_flags |= SDL_FULLSCREEN;
234 SDL_ShowCursor( SDL_DISABLE );
236 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
239 pthread_create( &this->thread, NULL, consumer_thread, this );
245 int consumer_stop( mlt_consumer parent )
247 // Get the actual object
248 consumer_sdl this = parent->child;
250 if ( this->joined == 0 )
252 // Kill the thread and clean up
256 pthread_join( this->thread, NULL );
259 if ( this->sdl_overlay != NULL )
260 SDL_FreeYUVOverlay( this->sdl_overlay );
261 this->sdl_overlay = NULL;
263 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
265 pthread_mutex_lock( &this->audio_mutex );
266 pthread_cond_broadcast( &this->audio_cond );
267 pthread_mutex_unlock( &this->audio_mutex );
268 SDL_QuitSubSystem( SDL_INIT_AUDIO );
271 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
274 this->sdl_screen = NULL;
280 int consumer_is_stopped( mlt_consumer parent )
282 consumer_sdl this = parent->child;
283 return !this->running;
286 static int sdl_lock_display( )
288 SDL_Surface *screen = SDL_GetVideoSurface( );
289 return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
292 static void sdl_unlock_display( )
294 SDL_Surface *screen = SDL_GetVideoSurface( );
295 if ( screen != NULL && SDL_MUSTLOCK( screen ) )
296 SDL_UnlockSurface( screen );
299 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
301 consumer_sdl this = udata;
304 double volume = mlt_properties_get_double( this->properties, "volume" );
306 pthread_mutex_lock( &this->audio_mutex );
308 // Block until audio received
309 while ( this->running && len > this->audio_avail )
310 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
312 if ( this->audio_avail >= len )
314 // Place in the audio buffer
316 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
318 memcpy( stream, this->audio_buffer, len );
320 // Remove len from the audio available
321 this->audio_avail -= len;
323 // Remove the samples
324 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
328 // Just to be safe, wipe the stream first
329 memset( stream, 0, len );
332 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
335 this->audio_avail = 0;
338 // We're definitely playing now
341 pthread_cond_broadcast( &this->audio_cond );
342 pthread_mutex_unlock( &this->audio_mutex );
345 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
347 // Get the properties of this consumer
348 mlt_properties properties = this->properties;
349 mlt_audio_format afmt = mlt_audio_pcm;
351 // Set the preferred params of the test card signal
352 int channels = mlt_properties_get_int( properties, "channels" );
353 int frequency = mlt_properties_get_int( properties, "frequency" );
354 static int counter = 0;
356 int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
361 mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
362 *duration = ( ( samples * 1000 ) / frequency );
364 if ( mlt_properties_get_int( properties, "audio_off" ) )
371 if ( init_audio == 1 )
373 SDL_AudioSpec request;
376 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
378 // specify audio format
379 memset( &request, 0, sizeof( SDL_AudioSpec ) );
381 request.freq = frequency;
382 request.format = AUDIO_S16SYS;
383 request.channels = channels;
384 request.samples = audio_buffer;
385 request.callback = sdl_fill_audio;
386 request.userdata = (void *)this;
387 if ( SDL_OpenAudio( &request, &got ) != 0 )
389 fprintf( stderr, "SDL failed to open audio: %s\n", SDL_GetError() );
392 else if ( got.size != 0 )
399 if ( init_audio == 0 )
401 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
402 bytes = ( samples * channels * 2 );
403 pthread_mutex_lock( &this->audio_mutex );
404 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
405 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
408 if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
409 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
411 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
412 this->audio_avail += bytes;
414 pthread_cond_broadcast( &this->audio_cond );
415 pthread_mutex_unlock( &this->audio_mutex );
425 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
427 // Get the properties of this consumer
428 mlt_properties properties = this->properties;
430 mlt_image_format vfmt = mlt_image_yuv422;
431 int width = this->width, height = this->height;
435 int video_off = mlt_properties_get_int( properties, "video_off" );
436 int preview_off = mlt_properties_get_int( properties, "preview_off" );
437 mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
438 int display_off = video_off | preview_off;
440 if ( this->running && display_off == 0 )
442 // Get the image, width and height
443 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
444 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
445 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
448 if ( this->sdl_screen != NULL )
453 changed = consumer_get_dimensions( &this->window_width, &this->window_height );
454 sdl_unlock_display( );
456 while ( SDL_PollEvent( &event ) )
458 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
462 case SDL_VIDEORESIZE:
463 this->window_width = event.resize.w;
464 this->window_height = event.resize.h;
472 mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
473 char keyboard[ 2 ] = " ";
474 void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
475 if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
477 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
478 callback( producer, keyboard );
488 if ( width != this->width || height != this->height )
490 if ( this->sdl_overlay != NULL )
491 SDL_FreeYUVOverlay( this->sdl_overlay );
492 this->sdl_overlay = NULL;
495 if ( this->running && ( this->sdl_screen == NULL || changed ) )
497 // Force an overlay recreation
498 if ( this->sdl_overlay != NULL )
499 SDL_FreeYUVOverlay( this->sdl_overlay );
500 this->sdl_overlay = NULL;
502 // open SDL window with video overlay, if possible
503 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
504 if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
505 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
507 uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
508 SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
509 SDL_Flip( this->sdl_screen );
514 // Determine window's new display aspect ratio
515 double this_aspect = ( double )this->window_width / this->window_height;
517 // Get the display aspect ratio
518 double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
520 // Determine frame's display aspect ratio
521 double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
523 // Store the width and height received
525 this->height = height;
527 // If using hardware scaler
528 if ( mlt_properties_get( properties, "rescale" ) != NULL &&
529 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
531 // Use hardware scaler to normalise display aspect ratio
532 this->rect.w = frame_aspect / this_aspect * this->window_width;
533 this->rect.h = this->window_height;
534 if ( this->rect.w > this->window_width )
536 this->rect.w = this->window_width;
537 this->rect.h = this_aspect / frame_aspect * this->window_height;
540 // Special case optimisation to negate odd effect of sample aspect ratio
541 // not corresponding exactly with image resolution.
542 else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
544 this->rect.w = this->window_width;
545 this->rect.h = this->window_height;
547 // Use hardware scaler to normalise sample aspect ratio
548 else if ( this->window_height * display_ratio > this->window_width )
550 this->rect.w = this->window_width;
551 this->rect.h = this->window_width / display_ratio;
555 this->rect.w = this->window_height * display_ratio;
556 this->rect.h = this->window_height;
559 this->rect.x = ( this->window_width - this->rect.w ) / 2;
560 this->rect.y = ( this->window_height - this->rect.h ) / 2;
561 this->rect.x -= this->rect.x % 2;
563 mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
564 mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
565 mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
566 mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
568 SDL_SetClipRect( this->sdl_screen, &this->rect );
571 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
573 SDL_SetClipRect( this->sdl_screen, &this->rect );
574 this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
577 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
579 this->buffer = this->sdl_overlay->pixels[ 0 ];
580 if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
583 memcpy( this->buffer, image, width * height * 2 );
584 SDL_UnlockYUVOverlay( this->sdl_overlay );
585 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
589 sdl_unlock_display();
591 else if ( this->running )
593 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
595 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
596 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
597 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
603 static void *video_thread( void *arg )
606 consumer_sdl this = arg;
608 // Obtain time of thread start
613 mlt_frame next = NULL;
614 mlt_properties properties = NULL;
617 // Get real time flag
618 int real_time = mlt_properties_get_int( this->properties, "real_time" );
620 // Get the current time
621 gettimeofday( &now, NULL );
623 // Determine start time
624 start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
626 while ( this->running )
628 // Pop the next frame
629 pthread_mutex_lock( &this->video_mutex );
630 next = mlt_deque_pop_front( this->queue );
631 while ( next == NULL && this->running )
633 pthread_cond_wait( &this->video_cond, &this->video_mutex );
634 next = mlt_deque_pop_front( this->queue );
636 pthread_mutex_unlock( &this->video_mutex );
638 if ( !this->running || next == NULL ) break;
640 // Get the properties
641 properties = MLT_FRAME_PROPERTIES( next );
643 // Get the speed of the frame
644 speed = mlt_properties_get_double( properties, "_speed" );
646 // Get the current time
647 gettimeofday( &now, NULL );
649 // Get the elapsed time
650 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
652 // See if we have to delay the display of the current frame
653 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
655 // Obtain the scheduled playout time
656 int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
658 // Determine the difference between the elapsed time and the scheduled playout time
659 int64_t difference = scheduled - elapsed;
661 // Smooth playback a bit
662 if ( real_time && ( difference > 20000 && speed == 1.0 ) )
664 tm.tv_sec = difference / 1000000;
665 tm.tv_nsec = ( difference % 1000000 ) * 500;
666 nanosleep( &tm, NULL );
669 // Show current frame if not too old
670 if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
671 consumer_play_video( this, next );
673 // If the queue is empty, recalculate start to allow build up again
674 if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
676 gettimeofday( &now, NULL );
677 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
681 // This frame can now be closed
682 mlt_frame_close( next );
687 mlt_frame_close( next );
689 mlt_consumer_stopped( &this->parent );
694 /** Threaded wrapper for pipe.
697 static void *consumer_thread( void *arg )
700 consumer_sdl this = arg;
703 mlt_consumer consumer = &this->parent;
705 // Convenience functionality
706 int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
712 // internal intialization
715 mlt_frame frame = NULL;
716 mlt_properties properties = NULL;
718 int64_t playtime = 0;
719 struct timespec tm = { 0, 100000 };
721 // Loop until told not to
722 while( !terminated && this->running )
724 // Get a frame from the attached producer
725 frame = mlt_consumer_rt_frame( consumer );
727 // Check for termination
728 if ( terminate_on_pause && frame != NULL )
729 terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
731 // Ensure that we have a frame
734 // Get the frame properties
735 properties = MLT_FRAME_PROPERTIES( frame );
738 init_audio = consumer_play_audio( this, frame, init_audio, &duration );
740 // Determine the start time now
741 if ( this->playing && init_video )
743 // Create the video thread
744 pthread_create( &thread, NULL, video_thread, this );
746 // Video doesn't need to be initialised any more
750 // Set playtime for this frame
751 mlt_properties_set_int( properties, "playtime", playtime );
753 while ( this->running && mlt_deque_count( this->queue ) > 15 )
754 nanosleep( &tm, NULL );
756 // Push this frame to the back of the queue
757 pthread_mutex_lock( &this->video_mutex );
758 mlt_deque_push_back( this->queue, frame );
759 pthread_cond_broadcast( &this->video_cond );
760 pthread_mutex_unlock( &this->video_mutex );
762 // Calculate the next playtime
763 playtime += ( duration * 1000 );
769 // Kill the video thread
770 if ( init_video == 0 )
772 pthread_mutex_lock( &this->video_mutex );
773 pthread_cond_broadcast( &this->video_cond );
774 pthread_mutex_unlock( &this->video_mutex );
775 pthread_join( thread, NULL );
778 while( mlt_deque_count( this->queue ) )
779 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
781 this->sdl_screen = NULL;
782 this->audio_avail = 0;
787 static int consumer_get_dimensions( int *width, int *height )
791 // SDL windows manager structure
794 // Specify the SDL Version
795 SDL_VERSION( &wm.version );
798 //sdl_lock_display();
801 // Get the wm structure
802 if ( SDL_GetWMInfo( &wm ) == 1 )
804 // Check that we have the X11 wm
805 if ( wm.subsystem == SDL_SYSWM_X11 )
807 // Get the SDL window
808 Window window = wm.info.x11.window;
810 // Get the display session
811 Display *display = wm.info.x11.display;
813 // Get the window attributes
814 XWindowAttributes attr;
815 XGetWindowAttributes( display, window, &attr );
817 // Determine whether window has changed
818 changed = *width != attr.width || *height != attr.height;
820 // Return width and height
822 *height = attr.height;
827 // Unlock the display
828 //sdl_unlock_display();
833 /** Callback to allow override of the close method.
836 static void consumer_close( mlt_consumer parent )
838 // Get the actual object
839 consumer_sdl this = parent->child;
842 ///mlt_consumer_stop( parent );
844 // Now clean up the rest
845 mlt_consumer_close( parent );
848 mlt_deque_close( this->queue );
851 pthread_mutex_destroy( &this->audio_mutex );
852 pthread_cond_destroy( &this->audio_cond );
854 // Finally clean up this