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
;
45 uint8_t audio_buffer
[ 4096 * 10 ];
47 pthread_mutex_t audio_mutex
;
48 pthread_cond_t audio_cond
;
49 pthread_mutex_t video_mutex
;
50 pthread_cond_t video_cond
;
55 double last_frame_aspect
;
60 SDL_Surface
*sdl_screen
;
61 SDL_Overlay
*sdl_overlay
;
66 /** Forward references to static functions.
69 static int consumer_start( mlt_consumer parent
);
70 static int consumer_stop( mlt_consumer parent
);
71 static int consumer_is_stopped( mlt_consumer parent
);
72 static void consumer_close( mlt_consumer parent
);
73 static void *consumer_thread( void * );
74 static int consumer_get_dimensions( int *width
, int *height
);
76 /** This is what will be called by the factory - anything can be passed in
77 via the argument, but keep it simple.
80 mlt_consumer
consumer_sdl_init( char *arg
)
82 // Create the consumer object
83 consumer_sdl
this = calloc( sizeof( struct consumer_sdl_s
), 1 );
85 // If no malloc'd and consumer init ok
86 if ( this != NULL
&& mlt_consumer_init( &this->parent
, this ) == 0 )
89 this->queue
= mlt_deque_init( );
91 // Get the parent consumer object
92 mlt_consumer parent
= &this->parent
;
94 // We have stuff to clean up, so override the close method
95 parent
->close
= consumer_close
;
97 // get a handle on properties
98 mlt_service service
= mlt_consumer_service( parent
);
99 this->properties
= mlt_service_properties( service
);
101 // Set the default volume
102 mlt_properties_set_double( this->properties
, "volume", 1.0 );
104 // This is the initialisation of the consumer
105 pthread_mutex_init( &this->audio_mutex
, NULL
);
106 pthread_cond_init( &this->audio_cond
, NULL
);
107 pthread_mutex_init( &this->video_mutex
, NULL
);
108 pthread_cond_init( &this->video_cond
, NULL
);
110 // Default scaler (for now we'll use nearest)
111 mlt_properties_set( this->properties
, "rescale", "nearest" );
113 // Default buffer for low latency
114 mlt_properties_set_int( this->properties
, "buffer", 1 );
116 // Default progressive true
117 mlt_properties_set_int( this->properties
, "progressive", 0 );
119 // Default audio buffer
120 mlt_properties_set_int( this->properties
, "audio_buffer", 1024 );
122 // Get sample aspect ratio
123 this->aspect_ratio
= mlt_properties_get_double( this->properties
, "aspect_ratio" );
125 // Default display aspect ratio
126 this->display_aspect
= 4.0 / 3.0;
128 // process actual param
129 if ( arg
== NULL
|| sscanf( arg
, "%dx%d", &this->width
, &this->height
) != 2 )
131 this->width
= mlt_properties_get_int( this->properties
, "width" );
132 this->height
= mlt_properties_get_int( this->properties
, "height" );
134 // Default window size
135 this->window_width
= ( float )this->height
* this->display_aspect
;
136 this->window_height
= this->height
;
140 if ( (int)( ( float )this->width
/ this->height
* 1000 ) !=
141 (int)( this->display_aspect
* 1000 ) )
144 this->display_aspect
= ( float )this->width
/ this->height
;
145 this->aspect_ratio
= 1.0;
146 mlt_properties_set_double( this->properties
, "aspect_ratio", this->aspect_ratio
);
150 this->window_width
= this->width
;
151 this->window_height
= this->height
;
155 this->sdl_flags
= SDL_HWSURFACE
| SDL_ASYNCBLIT
| SDL_HWACCEL
| SDL_RESIZABLE
| SDL_DOUBLEBUF
;
157 // Allow thread to be started/stopped
158 parent
->start
= consumer_start
;
159 parent
->stop
= consumer_stop
;
160 parent
->is_stopped
= consumer_is_stopped
;
162 // Return the consumer produced
166 // malloc or consumer init failed
173 int consumer_start( mlt_consumer parent
)
175 consumer_sdl
this = parent
->child
;
177 if ( !this->running
)
179 pthread_attr_t thread_attributes
;
184 // Allow the user to force resizing to window size
185 if ( mlt_properties_get_int( this->properties
, "resize" ) )
187 mlt_properties_set_int( this->properties
, "width", this->width
);
188 mlt_properties_set_int( this->properties
, "height", this->height
);
191 // Inherit the scheduling priority
192 pthread_attr_init( &thread_attributes
);
193 pthread_attr_setinheritsched( &thread_attributes
, PTHREAD_INHERIT_SCHED
);
195 pthread_create( &this->thread
, &thread_attributes
, consumer_thread
, this );
201 int consumer_stop( mlt_consumer parent
)
203 // Get the actual object
204 consumer_sdl
this = parent
->child
;
206 if ( this->joined
== 0 )
208 // Kill the thread and clean up
211 pthread_mutex_lock( &this->audio_mutex
);
212 pthread_cond_broadcast( &this->audio_cond
);
213 pthread_mutex_unlock( &this->audio_mutex
);
215 pthread_join( this->thread
, NULL
);
222 int consumer_is_stopped( mlt_consumer parent
)
224 consumer_sdl
this = parent
->child
;
225 return !this->running
;
228 static int sdl_lock_display( )
230 SDL_Surface
*screen
= SDL_GetVideoSurface( );
231 return screen
!= NULL
&& ( !SDL_MUSTLOCK( screen
) || SDL_LockSurface( screen
) >= 0 );
234 static void sdl_unlock_display( )
236 SDL_Surface
*screen
= SDL_GetVideoSurface( );
237 if ( screen
!= NULL
&& SDL_MUSTLOCK( screen
) )
238 SDL_UnlockSurface( screen
);
241 static void sdl_fill_audio( void *udata
, uint8_t *stream
, int len
)
243 consumer_sdl
this = udata
;
246 float volume
= mlt_properties_get_double( this->properties
, "volume" );
248 pthread_mutex_lock( &this->audio_mutex
);
250 // Block until audio received
251 while ( this->running
&& len
> this->audio_avail
)
252 pthread_cond_wait( &this->audio_cond
, &this->audio_mutex
);
254 if ( this->audio_avail
>= len
)
256 // Place in the audio buffer
257 memcpy( stream
, this->audio_buffer
, len
);
259 // Remove len from the audio available
260 this->audio_avail
-= len
;
262 // Remove the samples
263 memmove( this->audio_buffer
, this->audio_buffer
+ len
, this->audio_avail
);
267 // Just to be safe, wipe the stream first
268 memset( stream
, 0, len
);
270 // Copy what we have into the stream
271 memcpy( stream
, this->audio_buffer
, this->audio_avail
);
274 SDL_MixAudio( stream
, stream
, len
, ( int )( ( float )SDL_MIX_MAXVOLUME
* volume
) );
277 this->audio_avail
= 0;
280 // We're definitely playing now
283 pthread_cond_broadcast( &this->audio_cond
);
284 pthread_mutex_unlock( &this->audio_mutex
);
287 static int consumer_play_audio( consumer_sdl
this, mlt_frame frame
, int init_audio
, int *duration
)
289 // Get the properties of this consumer
290 mlt_properties properties
= this->properties
;
291 mlt_audio_format afmt
= mlt_audio_pcm
;
293 // Set the preferred params of the test card signal
294 int channels
= mlt_properties_get_int( properties
, "channels" );
295 int frequency
= mlt_properties_get_int( properties
, "frequency" );
296 static int counter
= 0;
298 int samples
= mlt_sample_calculator( mlt_properties_get_double( this->properties
, "fps" ), frequency
, counter
++ );
303 mlt_frame_get_audio( frame
, &pcm
, &afmt
, &frequency
, &channels
, &samples
);
304 *duration
= ( ( samples
* 1000 ) / frequency
);
306 if ( mlt_properties_get_int( properties
, "audio_off" ) )
313 if ( init_audio
== 1 )
315 SDL_AudioSpec request
;
318 int audio_buffer
= mlt_properties_get_int( properties
, "audio_buffer" );
320 // specify audio format
321 memset( &request
, 0, sizeof( SDL_AudioSpec
) );
323 request
.freq
= frequency
;
324 request
.format
= AUDIO_S16
;
325 request
.channels
= channels
;
326 request
.samples
= audio_buffer
;
327 request
.callback
= sdl_fill_audio
;
328 request
.userdata
= (void *)this;
329 if ( SDL_OpenAudio( &request
, &got
) != 0 )
331 fprintf( stderr
, "SDL failed to open audio: %s\n", SDL_GetError() );
334 else if ( got
.size
!= 0 )
341 if ( init_audio
== 0 )
343 mlt_properties properties
= mlt_frame_properties( frame
);
344 bytes
= ( samples
* channels
* 2 );
345 pthread_mutex_lock( &this->audio_mutex
);
346 while ( this->running
&& bytes
> ( sizeof( this->audio_buffer
) - this->audio_avail
) )
347 pthread_cond_wait( &this->audio_cond
, &this->audio_mutex
);
350 if ( mlt_properties_get_double( properties
, "_speed" ) == 1 )
351 memcpy( &this->audio_buffer
[ this->audio_avail
], pcm
, bytes
);
353 memset( &this->audio_buffer
[ this->audio_avail
], 0, bytes
);
354 this->audio_avail
+= bytes
;
356 pthread_cond_broadcast( &this->audio_cond
);
357 pthread_mutex_unlock( &this->audio_mutex
);
367 static int consumer_play_video( consumer_sdl
this, mlt_frame frame
)
369 // Get the properties of this consumer
370 mlt_properties properties
= this->properties
;
372 mlt_image_format vfmt
= mlt_image_yuv422
;
373 int width
= this->width
, height
= this->height
;
377 if ( mlt_properties_get_int( properties
, "video_off" ) == 0 )
379 // Get the image, width and height
380 mlt_frame_get_image( frame
, &image
, &vfmt
, &width
, &height
, 0 );
383 if ( this->sdl_screen
!= NULL
)
387 changed
= consumer_get_dimensions( &this->window_width
, &this->window_height
);
389 while ( SDL_PollEvent( &event
) )
393 case SDL_VIDEORESIZE
:
394 this->window_width
= event
.resize
.w
;
395 this->window_height
= event
.resize
.h
;
403 mlt_producer producer
= mlt_properties_get_data( properties
, "transport_producer", NULL
);
404 char keyboard
[ 2 ] = " ";
405 void (*callback
)( mlt_producer
, char * ) = mlt_properties_get_data( properties
, "transport_callback", NULL
);
406 if ( callback
!= NULL
&& producer
!= NULL
&& event
.key
.keysym
.unicode
< 0x80 && event
.key
.keysym
.unicode
> 0 )
408 keyboard
[ 0 ] = ( char )event
.key
.keysym
.unicode
;
409 callback( producer
, keyboard
);
417 if ( width
!= this->width
|| height
!= this->height
|| this->last_frame_aspect
!= mlt_frame_get_aspect_ratio( frame
) )
420 this->height
= height
;
421 this->last_frame_aspect
= mlt_frame_get_aspect_ratio( frame
);
425 if ( this->sdl_screen
== NULL
|| changed
)
427 // Determine frame's display aspect ratio
428 float frame_aspect
= mlt_frame_get_aspect_ratio( frame
) * this->width
/ this->height
;
430 // Determine window's new display aspect ratio
431 float this_aspect
= ( float )this->window_width
/ this->window_height
;
433 // If using hardware scaler
434 if ( mlt_properties_get( properties
, "rescale" ) != NULL
&&
435 !strcmp( mlt_properties_get( properties
, "rescale" ), "none" ) )
437 // Special case optimisation to negate odd effect of sample aspect ratio
438 // not corresponding exactly with image resolution.
439 if ( ( (int)( this_aspect
* 1000 ) == (int)( this->display_aspect
* 1000 ) ) &&
440 ( (int)( mlt_frame_get_aspect_ratio( frame
) * 1000 ) == (int)( this->aspect_ratio
* 1000 ) ) )
442 this->rect
.w
= this->window_width
;
443 this->rect
.h
= this->window_height
;
447 // Use hardware scaler to normalise display aspect ratio
448 this->rect
.w
= frame_aspect
/ this_aspect
* this->window_width
;
449 this->rect
.h
= this->window_height
;
450 if ( this->rect
.w
> this->window_width
)
452 this->rect
.w
= this->window_width
;
453 this->rect
.h
= this_aspect
/ frame_aspect
* this->window_height
;
457 // Special case optimisation to negate odd effect of sample aspect ratio
458 // not corresponding exactly with image resolution.
459 else if ( (int)( this_aspect
* 1000 ) == (int)( this->display_aspect
* 1000 ) )
461 this->rect
.w
= this->window_width
;
462 this->rect
.h
= this->window_height
;
464 // Use hardware scaler to normalise sample aspect ratio
465 else if ( this->window_height
* this->display_aspect
> this->window_width
)
467 this->rect
.w
= this->window_width
;
468 this->rect
.h
= this->window_width
/ this->display_aspect
;
472 this->rect
.w
= this->window_height
* this->display_aspect
;
473 this->rect
.h
= this->window_height
;
476 this->rect
.x
= ( this->window_width
- this->rect
.w
) / 2;
477 this->rect
.y
= ( this->window_height
- this->rect
.h
) / 2;
479 mlt_properties_set_int( this->properties
, "rect_x", this->rect
.x
);
480 mlt_properties_set_int( this->properties
, "rect_y", this->rect
.y
);
481 mlt_properties_set_int( this->properties
, "rect_w", this->rect
.w
);
482 mlt_properties_set_int( this->properties
, "rect_h", this->rect
.h
);
484 // Force an overlay recreation
485 if ( this->sdl_overlay
!= NULL
)
486 SDL_FreeYUVOverlay( this->sdl_overlay
);
488 // open SDL window with video overlay, if possible
490 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
491 sdl_unlock_display();
493 if ( this->sdl_screen
!= NULL
)
495 SDL_SetClipRect( this->sdl_screen
, &this->rect
);
497 this->sdl_overlay
= SDL_CreateYUVOverlay( this->width
, this->height
, SDL_YUY2_OVERLAY
, this->sdl_screen
);
498 sdl_unlock_display();
502 if ( mlt_properties_get_int( properties
, "changed" ) )
505 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
506 SDL_SetClipRect( this->sdl_screen
, &this->rect
);
507 SDL_Flip( this->sdl_screen
);
508 sdl_unlock_display();
509 mlt_properties_set_int( properties
, "changed", 0 );
512 if ( this->sdl_screen
!= NULL
&& this->sdl_overlay
!= NULL
)
514 this->buffer
= this->sdl_overlay
->pixels
[ 0 ];
516 if ( SDL_LockYUVOverlay( this->sdl_overlay
) >= 0 )
519 memcpy( this->buffer
, image
, width
* height
* 2 );
520 SDL_UnlockYUVOverlay( this->sdl_overlay
);
521 SDL_DisplayYUVOverlay( this->sdl_overlay
, &this->sdl_screen
->clip_rect
);
523 sdl_unlock_display();
530 static void *video_thread( void *arg
)
533 consumer_sdl
this = arg
;
535 // Obtain time of thread start
540 mlt_frame next
= NULL
;
541 mlt_properties properties
= NULL
;
544 // Get real time flag
545 int real_time
= mlt_properties_get_int( this->properties
, "real_time" );
547 // Get the current time
548 gettimeofday( &now
, NULL
);
550 // Determine start time
551 start
= ( int64_t )now
.tv_sec
* 1000000 + now
.tv_usec
;
553 while ( this->running
)
555 // Pop the next frame
556 pthread_mutex_lock( &this->video_mutex
);
557 while ( ( next
= mlt_deque_pop_front( this->queue
) ) == NULL
&& this->running
)
558 pthread_cond_wait( &this->video_cond
, &this->video_mutex
);
559 pthread_mutex_unlock( &this->video_mutex
);
561 // Get the properties
562 properties
= mlt_frame_properties( next
);
564 // Get the speed of the frame
565 speed
= mlt_properties_get_double( properties
, "_speed" );
567 // Get the current time
568 gettimeofday( &now
, NULL
);
570 // Get the elapsed time
571 elapsed
= ( ( int64_t )now
.tv_sec
* 1000000 + now
.tv_usec
) - start
;
573 // See if we have to delay the display of the current frame
574 if ( mlt_properties_get_int( properties
, "rendered" ) == 1 && this->running
)
576 // Obtain the scheduled playout time
577 mlt_position scheduled
= mlt_properties_get_position( properties
, "playtime" );
579 // Determine the difference between the elapsed time and the scheduled playout time
580 mlt_position difference
= scheduled
- elapsed
;
582 // Smooth playback a bit
583 if ( real_time
&& ( difference
> 20000 && speed
== 1.0 ) )
585 tm
.tv_sec
= difference
/ 1000000;
586 tm
.tv_nsec
= ( difference
% 1000000 ) * 500;
587 nanosleep( &tm
, NULL
);
590 // Show current frame if not too old
591 if ( !real_time
|| ( difference
> -10000 || speed
!= 1.0 || mlt_deque_count( this->queue
) < 2 ) )
592 consumer_play_video( this, next
);
594 // If the queue is empty, recalculate start to allow build up again
595 if ( real_time
&& ( mlt_deque_count( this->queue
) == 0 && speed
== 1.0 ) )
597 gettimeofday( &now
, NULL
);
598 start
= ( ( int64_t )now
.tv_sec
* 1000000 + now
.tv_usec
) - scheduled
+ 20000;
602 // This frame can now be closed
603 mlt_frame_close( next
);
606 mlt_consumer_stopped( &this->parent
);
611 /** Threaded wrapper for pipe.
614 static void *consumer_thread( void *arg
)
617 consumer_sdl
this = arg
;
620 mlt_consumer consumer
= &this->parent
;
625 // internal intialization
628 mlt_frame frame
= NULL
;
629 mlt_properties properties
= NULL
;
631 int64_t playtime
= 0;
632 struct timespec tm
= { 0, 100000 };
634 if ( SDL_Init( SDL_INIT_VIDEO
| SDL_INIT_AUDIO
| SDL_INIT_NOPARACHUTE
) < 0 )
636 fprintf( stderr
, "Failed to initialize SDL: %s\n", SDL_GetError() );
640 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY
, SDL_DEFAULT_REPEAT_INTERVAL
);
641 SDL_EnableUNICODE( 1 );
643 // Loop until told not to
644 while( this->running
)
646 // Get a frame from the attached producer
647 frame
= mlt_consumer_rt_frame( consumer
);
649 // Ensure that we have a frame
652 // Get the frame properties
653 properties
= mlt_frame_properties( frame
);
656 init_audio
= consumer_play_audio( this, frame
, init_audio
, &duration
);
658 // Determine the start time now
659 if ( this->playing
&& init_video
)
661 // Create the video thread
662 pthread_create( &thread
, NULL
, video_thread
, this );
664 // Video doesn't need to be initialised any more
668 // Set playtime for this frame
669 mlt_properties_set_position( properties
, "playtime", playtime
);
671 while ( this->running
&& mlt_deque_count( this->queue
) > 15 )
672 nanosleep( &tm
, NULL
);
674 // Push this frame to the back of the queue
675 pthread_mutex_lock( &this->video_mutex
);
676 mlt_deque_push_back( this->queue
, frame
);
677 pthread_cond_broadcast( &this->video_cond
);
678 pthread_mutex_unlock( &this->video_mutex
);
680 // Calculate the next playtime
681 playtime
+= ( duration
* 1000 );
685 // Kill the video thread
686 if ( init_video
== 0 )
688 pthread_mutex_lock( &this->video_mutex
);
689 pthread_cond_broadcast( &this->video_cond
);
690 pthread_mutex_unlock( &this->video_mutex
);
691 pthread_join( thread
, NULL
);
695 if ( this->sdl_overlay
!= NULL
)
696 SDL_FreeYUVOverlay( this->sdl_overlay
);
699 while( mlt_deque_count( this->queue
) )
700 mlt_frame_close( mlt_deque_pop_back( this->queue
) );
702 this->sdl_screen
= NULL
;
703 this->sdl_overlay
= NULL
;
704 this->audio_avail
= 0;
709 static int consumer_get_dimensions( int *width
, int *height
)
713 // SDL windows manager structure
716 // Specify the SDL Version
717 SDL_VERSION( &wm
.version
);
722 // Get the wm structure
723 if ( SDL_GetWMInfo( &wm
) == 1 )
725 // Check that we have the X11 wm
726 if ( wm
.subsystem
== SDL_SYSWM_X11
)
728 // Get the SDL window
729 Window window
= wm
.info
.x11
.window
;
731 // Get the display session
732 Display
*display
= wm
.info
.x11
.display
;
734 // Get the window attributes
735 XWindowAttributes attr
;
736 XGetWindowAttributes( display
, window
, &attr
);
738 // Determine whether window has changed
739 changed
= *width
!= attr
.width
|| *height
!= attr
.height
;
741 // Return width and height
743 *height
= attr
.height
;
747 // Unlock the display
753 /** Callback to allow override of the close method.
756 static void consumer_close( mlt_consumer parent
)
758 // Get the actual object
759 consumer_sdl
this = parent
->child
;
762 mlt_consumer_stop( parent
);
765 mlt_deque_close( this->queue
);
768 pthread_mutex_destroy( &this->audio_mutex
);
769 pthread_cond_destroy( &this->audio_cond
);
771 // Now clean up the rest
772 mlt_consumer_close( parent
);
774 // Finally clean up this