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>
26 #include <framework/mlt_log.h>
32 #include <SDL/SDL_syswm.h>
35 /** This classes definition.
38 typedef struct consumer_sdl_s *consumer_sdl;
42 struct mlt_consumer_s parent;
43 mlt_properties properties;
48 uint8_t audio_buffer[ 4096 * 10 ];
50 pthread_mutex_t audio_mutex;
51 pthread_cond_t audio_cond;
52 pthread_mutex_t video_mutex;
53 pthread_cond_t video_cond;
62 SDL_Surface *sdl_screen;
63 SDL_Overlay *sdl_overlay;
70 /** Forward references to static functions.
73 static int consumer_start( mlt_consumer parent );
74 static int consumer_stop( mlt_consumer parent );
75 static int consumer_is_stopped( mlt_consumer parent );
76 static void consumer_close( mlt_consumer parent );
77 static void *consumer_thread( void * );
78 static int consumer_get_dimensions( int *width, int *height );
79 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args );
81 /** This is what will be called by the factory - anything can be passed in
82 via the argument, but keep it simple.
85 mlt_consumer consumer_sdl_init( mlt_profile profile, mlt_service_type type, const char *id, char *arg )
87 // Create the consumer object
88 consumer_sdl this = calloc( sizeof( struct consumer_sdl_s ), 1 );
90 // If no malloc'd and consumer init ok
91 if ( this != NULL && mlt_consumer_init( &this->parent, this, profile ) == 0 )
94 this->queue = mlt_deque_init( );
96 // Get the parent consumer object
97 mlt_consumer parent = &this->parent;
99 // We have stuff to clean up, so override the close method
100 parent->close = consumer_close;
102 // get a handle on properties
103 mlt_service service = MLT_CONSUMER_SERVICE( parent );
104 this->properties = MLT_SERVICE_PROPERTIES( service );
106 // Set the default volume
107 mlt_properties_set_double( this->properties, "volume", 1.0 );
109 // This is the initialisation of the consumer
110 pthread_mutex_init( &this->audio_mutex, NULL );
111 pthread_cond_init( &this->audio_cond, NULL);
112 pthread_mutex_init( &this->video_mutex, NULL );
113 pthread_cond_init( &this->video_cond, NULL);
115 // Default scaler (for now we'll use nearest)
116 mlt_properties_set( this->properties, "rescale", "nearest" );
118 // Default buffer for low latency
119 mlt_properties_set_int( this->properties, "buffer", 1 );
121 // Default audio buffer
122 mlt_properties_set_int( this->properties, "audio_buffer", 512 );
124 // Ensure we don't join on a non-running object
127 // process actual param
128 if ( arg == NULL || sscanf( arg, "%dx%d", &this->width, &this->height ) != 2 )
130 this->width = mlt_properties_get_int( this->properties, "width" );
131 this->height = mlt_properties_get_int( this->properties, "height" );
135 this->sdl_flags = SDL_HWSURFACE | SDL_ASYNCBLIT | SDL_HWACCEL | SDL_RESIZABLE | SDL_DOUBLEBUF;
137 // Allow thread to be started/stopped
138 parent->start = consumer_start;
139 parent->stop = consumer_stop;
140 parent->is_stopped = consumer_is_stopped;
142 // Register specific events
143 mlt_events_register( this->properties, "consumer-sdl-event", ( mlt_transmitter )consumer_sdl_event );
145 // Return the consumer produced
149 // malloc or consumer init failed
156 static void consumer_sdl_event( mlt_listener listener, mlt_properties owner, mlt_service this, void **args )
158 if ( listener != NULL )
159 listener( owner, this, ( SDL_Event * )args[ 0 ] );
162 int consumer_start( mlt_consumer parent )
164 consumer_sdl this = parent->child;
166 if ( !this->running )
168 int video_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "video_off" );
169 int preview_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "preview_off" );
170 int display_off = video_off | preview_off;
171 int audio_off = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" );
172 int sdl_started = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" );
174 consumer_stop( parent );
179 if ( mlt_properties_get_int( this->properties, "width" ) > 0 )
180 this->width = mlt_properties_get_int( this->properties, "width" );
181 if ( mlt_properties_get_int( this->properties, "height" ) > 0 )
182 this->height = mlt_properties_get_int( this->properties, "height" );
184 this->bpp = mlt_properties_get_int( this->properties, "bpp" );
186 // Attach a colour space converter
187 if ( preview_off && !this->filtered )
189 mlt_profile profile = mlt_service_profile( MLT_CONSUMER_SERVICE( parent ) );
190 mlt_filter filter = mlt_factory_filter( profile, "avcolour_space", NULL );
193 mlt_properties_set_int( MLT_FILTER_PROPERTIES( filter ), "forced", mlt_image_yuv422 );
194 mlt_service_attach( MLT_CONSUMER_SERVICE( parent ), filter );
195 mlt_filter_close( filter );
200 if ( sdl_started == 0 && display_off == 0 )
202 if ( SDL_Init( SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE ) < 0 )
204 fprintf( stderr, "Failed to initialize SDL: %s\n", SDL_GetError() );
208 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL );
209 SDL_EnableUNICODE( 1 );
211 else if ( display_off == 0 )
213 this->sdl_screen = SDL_GetVideoSurface( );
216 if ( audio_off == 0 )
217 SDL_InitSubSystem( SDL_INIT_AUDIO );
219 // Default window size
220 double display_ratio = mlt_properties_get_double( this->properties, "display_ratio" );
221 this->window_width = ( double )this->height * display_ratio;
222 this->window_height = this->height;
224 if ( this->sdl_screen == NULL && display_off == 0 )
226 if ( mlt_properties_get_int( this->properties, "fullscreen" ) )
228 const SDL_VideoInfo *vi = SDL_GetVideoInfo();
229 this->window_width = vi->current_w;
230 this->window_height = vi->current_h;
231 this->sdl_flags |= SDL_FULLSCREEN;
232 SDL_ShowCursor( SDL_DISABLE );
234 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, 0, this->sdl_flags );
237 pthread_create( &this->thread, NULL, consumer_thread, this );
243 int consumer_stop( mlt_consumer parent )
245 // Get the actual object
246 consumer_sdl this = parent->child;
248 if ( this->joined == 0 )
250 // Kill the thread and clean up
254 pthread_join( this->thread, NULL );
257 if ( this->sdl_overlay != NULL )
258 SDL_FreeYUVOverlay( this->sdl_overlay );
259 this->sdl_overlay = NULL;
261 if ( !mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "audio_off" ) )
263 pthread_mutex_lock( &this->audio_mutex );
264 pthread_cond_broadcast( &this->audio_cond );
265 pthread_mutex_unlock( &this->audio_mutex );
266 SDL_QuitSubSystem( SDL_INIT_AUDIO );
269 if ( mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( parent ), "sdl_started" ) == 0 )
272 this->sdl_screen = NULL;
278 int consumer_is_stopped( mlt_consumer parent )
280 consumer_sdl this = parent->child;
281 return !this->running;
284 static int sdl_lock_display( )
286 SDL_Surface *screen = SDL_GetVideoSurface( );
287 return screen != NULL && ( !SDL_MUSTLOCK( screen ) || SDL_LockSurface( screen ) >= 0 );
290 static void sdl_unlock_display( )
292 SDL_Surface *screen = SDL_GetVideoSurface( );
293 if ( screen != NULL && SDL_MUSTLOCK( screen ) )
294 SDL_UnlockSurface( screen );
297 static void sdl_fill_audio( void *udata, uint8_t *stream, int len )
299 consumer_sdl this = udata;
302 double volume = mlt_properties_get_double( this->properties, "volume" );
304 pthread_mutex_lock( &this->audio_mutex );
306 // Block until audio received
307 while ( this->running && len > this->audio_avail )
308 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
310 if ( this->audio_avail >= len )
312 // Place in the audio buffer
314 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
316 memcpy( stream, this->audio_buffer, len );
318 // Remove len from the audio available
319 this->audio_avail -= len;
321 // Remove the samples
322 memmove( this->audio_buffer, this->audio_buffer + len, this->audio_avail );
326 // Just to be safe, wipe the stream first
327 memset( stream, 0, len );
330 SDL_MixAudio( stream, this->audio_buffer, len, ( int )( ( float )SDL_MIX_MAXVOLUME * volume ) );
333 this->audio_avail = 0;
336 // We're definitely playing now
339 pthread_cond_broadcast( &this->audio_cond );
340 pthread_mutex_unlock( &this->audio_mutex );
343 static int consumer_play_audio( consumer_sdl this, mlt_frame frame, int init_audio, int *duration )
345 // Get the properties of this consumer
346 mlt_properties properties = this->properties;
347 mlt_audio_format afmt = mlt_audio_pcm;
349 // Set the preferred params of the test card signal
350 int channels = mlt_properties_get_int( properties, "channels" );
351 int frequency = mlt_properties_get_int( properties, "frequency" );
352 static int counter = 0;
354 int samples = mlt_sample_calculator( mlt_properties_get_double( this->properties, "fps" ), frequency, counter++ );
359 mlt_frame_get_audio( frame, &pcm, &afmt, &frequency, &channels, &samples );
360 *duration = ( ( samples * 1000 ) / frequency );
362 if ( mlt_properties_get_int( properties, "audio_off" ) )
369 if ( init_audio == 1 )
371 SDL_AudioSpec request;
374 int audio_buffer = mlt_properties_get_int( properties, "audio_buffer" );
376 // specify audio format
377 memset( &request, 0, sizeof( SDL_AudioSpec ) );
379 request.freq = frequency;
380 request.format = AUDIO_S16SYS;
381 request.channels = channels;
382 request.samples = audio_buffer;
383 request.callback = sdl_fill_audio;
384 request.userdata = (void *)this;
385 if ( SDL_OpenAudio( &request, &got ) != 0 )
387 mlt_log_error( MLT_CONSUMER_SERVICE( this ), "SDL failed to open audio: %s\n", SDL_GetError() );
390 else if ( got.size != 0 )
397 if ( init_audio == 0 )
399 mlt_properties properties = MLT_FRAME_PROPERTIES( frame );
400 bytes = ( samples * channels * 2 );
401 pthread_mutex_lock( &this->audio_mutex );
402 while ( this->running && bytes > ( sizeof( this->audio_buffer) - this->audio_avail ) )
403 pthread_cond_wait( &this->audio_cond, &this->audio_mutex );
406 if ( mlt_properties_get_double( properties, "_speed" ) == 1 )
407 memcpy( &this->audio_buffer[ this->audio_avail ], pcm, bytes );
409 memset( &this->audio_buffer[ this->audio_avail ], 0, bytes );
410 this->audio_avail += bytes;
412 pthread_cond_broadcast( &this->audio_cond );
413 pthread_mutex_unlock( &this->audio_mutex );
423 static int consumer_play_video( consumer_sdl this, mlt_frame frame )
425 // Get the properties of this consumer
426 mlt_properties properties = this->properties;
428 mlt_image_format vfmt = mlt_image_yuv422;
429 int width = this->width, height = this->height;
433 int video_off = mlt_properties_get_int( properties, "video_off" );
434 int preview_off = mlt_properties_get_int( properties, "preview_off" );
435 mlt_image_format preview_format = mlt_properties_get_int( properties, "preview_format" );
436 int display_off = video_off | preview_off;
438 if ( this->running && display_off == 0 )
440 // Get the image, width and height
441 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
442 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
443 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
446 if ( this->sdl_screen != NULL )
451 changed = consumer_get_dimensions( &this->window_width, &this->window_height );
452 sdl_unlock_display( );
454 while ( SDL_PollEvent( &event ) )
456 mlt_events_fire( this->properties, "consumer-sdl-event", &event, NULL );
460 case SDL_VIDEORESIZE:
461 this->window_width = event.resize.w;
462 this->window_height = event.resize.h;
470 mlt_producer producer = mlt_properties_get_data( properties, "transport_producer", NULL );
471 char keyboard[ 2 ] = " ";
472 void (*callback)( mlt_producer, char * ) = mlt_properties_get_data( properties, "transport_callback", NULL );
473 if ( callback != NULL && producer != NULL && event.key.keysym.unicode < 0x80 && event.key.keysym.unicode > 0 )
475 keyboard[ 0 ] = ( char )event.key.keysym.unicode;
476 callback( producer, keyboard );
486 if ( width != this->width || height != this->height )
488 if ( this->sdl_overlay != NULL )
489 SDL_FreeYUVOverlay( this->sdl_overlay );
490 this->sdl_overlay = NULL;
493 if ( this->running && ( this->sdl_screen == NULL || changed ) )
495 // Force an overlay recreation
496 if ( this->sdl_overlay != NULL )
497 SDL_FreeYUVOverlay( this->sdl_overlay );
498 this->sdl_overlay = NULL;
500 // open SDL window with video overlay, if possible
501 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
502 if ( consumer_get_dimensions( &this->window_width, &this->window_height ) )
503 this->sdl_screen = SDL_SetVideoMode( this->window_width, this->window_height, this->bpp, this->sdl_flags );
505 uint32_t color = mlt_properties_get_int( this->properties, "window_background" );
506 SDL_FillRect( this->sdl_screen, NULL, color >> 8 );
507 SDL_Flip( this->sdl_screen );
512 // Determine window's new display aspect ratio
513 double this_aspect = ( double )this->window_width / this->window_height;
515 // Get the display aspect ratio
516 double display_ratio = mlt_properties_get_double( properties, "display_ratio" );
518 // Determine frame's display aspect ratio
519 double frame_aspect = mlt_frame_get_aspect_ratio( frame ) * width / height;
521 // Store the width and height received
523 this->height = height;
525 // If using hardware scaler
526 if ( mlt_properties_get( properties, "rescale" ) != NULL &&
527 !strcmp( mlt_properties_get( properties, "rescale" ), "none" ) )
529 // Use hardware scaler to normalise display aspect ratio
530 this->rect.w = frame_aspect / this_aspect * this->window_width;
531 this->rect.h = this->window_height;
532 if ( this->rect.w > this->window_width )
534 this->rect.w = this->window_width;
535 this->rect.h = this_aspect / frame_aspect * this->window_height;
538 // Special case optimisation to negate odd effect of sample aspect ratio
539 // not corresponding exactly with image resolution.
540 else if ( (int)( this_aspect * 1000 ) == (int)( display_ratio * 1000 ) )
542 this->rect.w = this->window_width;
543 this->rect.h = this->window_height;
545 // Use hardware scaler to normalise sample aspect ratio
546 else if ( this->window_height * display_ratio > this->window_width )
548 this->rect.w = this->window_width;
549 this->rect.h = this->window_width / display_ratio;
553 this->rect.w = this->window_height * display_ratio;
554 this->rect.h = this->window_height;
557 this->rect.x = ( this->window_width - this->rect.w ) / 2;
558 this->rect.y = ( this->window_height - this->rect.h ) / 2;
559 this->rect.x -= this->rect.x % 2;
561 mlt_properties_set_int( this->properties, "rect_x", this->rect.x );
562 mlt_properties_set_int( this->properties, "rect_y", this->rect.y );
563 mlt_properties_set_int( this->properties, "rect_w", this->rect.w );
564 mlt_properties_set_int( this->properties, "rect_h", this->rect.h );
566 SDL_SetClipRect( this->sdl_screen, &this->rect );
569 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay == NULL )
571 SDL_SetClipRect( this->sdl_screen, &this->rect );
572 this->sdl_overlay = SDL_CreateYUVOverlay( width, height, SDL_YUY2_OVERLAY, this->sdl_screen );
575 if ( this->running && this->sdl_screen != NULL && this->sdl_overlay != NULL )
577 this->buffer = this->sdl_overlay->pixels[ 0 ];
578 if ( SDL_LockYUVOverlay( this->sdl_overlay ) >= 0 )
581 memcpy( this->buffer, image, width * height * 2 );
582 SDL_UnlockYUVOverlay( this->sdl_overlay );
583 SDL_DisplayYUVOverlay( this->sdl_overlay, &this->sdl_screen->clip_rect );
587 sdl_unlock_display();
589 else if ( this->running )
591 vfmt = preview_format == mlt_image_none ? mlt_image_rgb24a : preview_format;
593 mlt_frame_get_image( frame, &image, &vfmt, &width, &height, 0 );
594 mlt_properties_set_int( MLT_FRAME_PROPERTIES( frame ), "format", vfmt );
595 mlt_events_fire( properties, "consumer-frame-show", frame, NULL );
601 static void *video_thread( void *arg )
604 consumer_sdl this = arg;
606 // Obtain time of thread start
611 mlt_frame next = NULL;
612 mlt_properties properties = NULL;
615 // Get real time flag
616 int real_time = mlt_properties_get_int( this->properties, "real_time" );
618 // Get the current time
619 gettimeofday( &now, NULL );
621 // Determine start time
622 start = ( int64_t )now.tv_sec * 1000000 + now.tv_usec;
624 while ( this->running )
626 // Pop the next frame
627 pthread_mutex_lock( &this->video_mutex );
628 next = mlt_deque_pop_front( this->queue );
629 while ( next == NULL && this->running )
631 pthread_cond_wait( &this->video_cond, &this->video_mutex );
632 next = mlt_deque_pop_front( this->queue );
634 pthread_mutex_unlock( &this->video_mutex );
636 if ( !this->running || next == NULL ) break;
638 // Get the properties
639 properties = MLT_FRAME_PROPERTIES( next );
641 // Get the speed of the frame
642 speed = mlt_properties_get_double( properties, "_speed" );
644 // Get the current time
645 gettimeofday( &now, NULL );
647 // Get the elapsed time
648 elapsed = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - start;
650 // See if we have to delay the display of the current frame
651 if ( mlt_properties_get_int( properties, "rendered" ) == 1 && this->running )
653 // Obtain the scheduled playout time
654 int64_t scheduled = mlt_properties_get_int( properties, "playtime" );
656 // Determine the difference between the elapsed time and the scheduled playout time
657 int64_t difference = scheduled - elapsed;
659 // Smooth playback a bit
660 if ( real_time && ( difference > 20000 && speed == 1.0 ) )
662 tm.tv_sec = difference / 1000000;
663 tm.tv_nsec = ( difference % 1000000 ) * 500;
664 nanosleep( &tm, NULL );
667 // Show current frame if not too old
668 if ( !real_time || ( difference > -10000 || speed != 1.0 || mlt_deque_count( this->queue ) < 2 ) )
669 consumer_play_video( this, next );
671 // If the queue is empty, recalculate start to allow build up again
672 if ( real_time && ( mlt_deque_count( this->queue ) == 0 && speed == 1.0 ) )
674 gettimeofday( &now, NULL );
675 start = ( ( int64_t )now.tv_sec * 1000000 + now.tv_usec ) - scheduled + 20000;
679 // This frame can now be closed
680 mlt_frame_close( next );
685 mlt_frame_close( next );
687 mlt_consumer_stopped( &this->parent );
692 /** Threaded wrapper for pipe.
695 static void *consumer_thread( void *arg )
698 consumer_sdl this = arg;
701 mlt_consumer consumer = &this->parent;
703 // Convenience functionality
704 int terminate_on_pause = mlt_properties_get_int( MLT_CONSUMER_PROPERTIES( consumer ), "terminate_on_pause" );
710 // internal intialization
713 mlt_frame frame = NULL;
714 mlt_properties properties = NULL;
716 int64_t playtime = 0;
717 struct timespec tm = { 0, 100000 };
719 // Loop until told not to
720 while( !terminated && this->running )
722 // Get a frame from the attached producer
723 frame = mlt_consumer_rt_frame( consumer );
725 // Check for termination
726 if ( terminate_on_pause && frame != NULL )
727 terminated = mlt_properties_get_double( MLT_FRAME_PROPERTIES( frame ), "_speed" ) == 0.0;
729 // Ensure that we have a frame
732 // Get the frame properties
733 properties = MLT_FRAME_PROPERTIES( frame );
736 init_audio = consumer_play_audio( this, frame, init_audio, &duration );
738 // Determine the start time now
739 if ( this->playing && init_video )
741 // Create the video thread
742 pthread_create( &thread, NULL, video_thread, this );
744 // Video doesn't need to be initialised any more
748 // Set playtime for this frame
749 mlt_properties_set_int( properties, "playtime", playtime );
751 while ( this->running && mlt_deque_count( this->queue ) > 15 )
752 nanosleep( &tm, NULL );
754 // Push this frame to the back of the queue
755 pthread_mutex_lock( &this->video_mutex );
756 mlt_deque_push_back( this->queue, frame );
757 pthread_cond_broadcast( &this->video_cond );
758 pthread_mutex_unlock( &this->video_mutex );
760 // Calculate the next playtime
761 playtime += ( duration * 1000 );
767 // Kill the video thread
768 if ( init_video == 0 )
770 pthread_mutex_lock( &this->video_mutex );
771 pthread_cond_broadcast( &this->video_cond );
772 pthread_mutex_unlock( &this->video_mutex );
773 pthread_join( thread, NULL );
776 while( mlt_deque_count( this->queue ) )
777 mlt_frame_close( mlt_deque_pop_back( this->queue ) );
779 this->sdl_screen = NULL;
780 this->audio_avail = 0;
785 static int consumer_get_dimensions( int *width, int *height )
789 // SDL windows manager structure
792 // Specify the SDL Version
793 SDL_VERSION( &wm.version );
796 //sdl_lock_display();
799 // Get the wm structure
800 if ( SDL_GetWMInfo( &wm ) == 1 )
802 // Check that we have the X11 wm
803 if ( wm.subsystem == SDL_SYSWM_X11 )
805 // Get the SDL window
806 Window window = wm.info.x11.window;
808 // Get the display session
809 Display *display = wm.info.x11.display;
811 // Get the window attributes
812 XWindowAttributes attr;
813 XGetWindowAttributes( display, window, &attr );
815 // Determine whether window has changed
816 changed = *width != attr.width || *height != attr.height;
818 // Return width and height
820 *height = attr.height;
825 // Unlock the display
826 //sdl_unlock_display();
831 /** Callback to allow override of the close method.
834 static void consumer_close( mlt_consumer parent )
836 // Get the actual object
837 consumer_sdl this = parent->child;
840 ///mlt_consumer_stop( parent );
842 // Now clean up the rest
843 mlt_consumer_close( parent );
846 mlt_deque_close( this->queue );
849 pthread_mutex_destroy( &this->audio_mutex );
850 pthread_cond_destroy( &this->audio_cond );
852 // Finally clean up this