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>
30 #include <sys/timeb.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 * 6 ];
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 progressive true
106 mlt_properties_set_int( this->properties
, "progressive", 1 );
109 this->aspect_ratio
= mlt_properties_get_double( this->properties
, "aspect_ratio" );
111 // process actual param
112 if ( arg
== NULL
|| sscanf( arg
, "%dx%d", &this->width
, &this->height
) != 2 )
114 this->width
= mlt_properties_get_int( this->properties
, "width" );
115 this->height
= mlt_properties_get_int( this->properties
, "height" );
118 // Default window size
119 this->window_width
= (int)( (float)this->height
* this->aspect_ratio
) + 1;
120 this->window_height
= this->height
;
123 this->sdl_flags
= SDL_HWSURFACE
| SDL_ASYNCBLIT
| SDL_HWACCEL
| SDL_RESIZABLE
;
125 // Allow thread to be started/stopped
126 parent
->start
= consumer_start
;
127 parent
->stop
= consumer_stop
;
128 parent
->is_stopped
= consumer_is_stopped
;
130 // Return the consumer produced
134 // malloc or consumer init failed
141 int consumer_start( mlt_consumer parent
)
143 consumer_sdl
this = parent
->child
;
145 if ( !this->running
)
148 pthread_create( &this->thread
, NULL
, consumer_thread
, this );
154 int consumer_stop( mlt_consumer parent
)
156 // Get the actual object
157 consumer_sdl
this = parent
->child
;
161 // Kill the thread and clean up
164 pthread_mutex_lock( &this->audio_mutex
);
165 pthread_cond_broadcast( &this->audio_cond
);
166 pthread_mutex_unlock( &this->audio_mutex
);
168 pthread_join( this->thread
, NULL
);
174 int consumer_is_stopped( mlt_consumer parent
)
176 consumer_sdl
this = parent
->child
;
177 return !this->running
;
180 static int sdl_lock_display( )
182 SDL_Surface
*screen
= SDL_GetVideoSurface( );
183 return screen
!= NULL
&& ( !SDL_MUSTLOCK( screen
) || SDL_LockSurface( screen
) >= 0 );
186 static void sdl_unlock_display( )
188 SDL_Surface
*screen
= SDL_GetVideoSurface( );
189 if ( screen
!= NULL
&& SDL_MUSTLOCK( screen
) )
190 SDL_UnlockSurface( screen
);
193 static void sdl_fill_audio( void *udata
, uint8_t *stream
, int len
)
195 consumer_sdl
this = udata
;
198 float volume
= mlt_properties_get_double( this->properties
, "volume" );
200 pthread_mutex_lock( &this->audio_mutex
);
202 // Block until audio received
203 while ( this->running
&& len
> this->audio_avail
)
204 pthread_cond_wait( &this->audio_cond
, &this->audio_mutex
);
206 if ( this->audio_avail
>= len
)
208 // Place in the audio buffer
209 SDL_MixAudio( stream
, this->audio_buffer
, len
, ( int )( ( float )SDL_MIX_MAXVOLUME
* volume
) );
211 // Remove len from the audio available
212 this->audio_avail
-= len
;
214 // Remove the samples
215 memmove( this->audio_buffer
, this->audio_buffer
+ len
, this->audio_avail
);
219 // Just to be safe, wipe the stream first
220 memset( stream
, 0, len
);
222 // Copy what we have into the stream
223 memcpy( stream
, this->audio_buffer
, this->audio_avail
);
226 SDL_MixAudio( stream
, stream
, len
, ( int )( ( float )SDL_MIX_MAXVOLUME
* volume
) );
229 this->audio_avail
= 0;
232 // We're definitely playing now
235 pthread_cond_broadcast( &this->audio_cond
);
236 pthread_mutex_unlock( &this->audio_mutex
);
239 static int consumer_play_audio( consumer_sdl
this, mlt_frame frame
, int init_audio
, int *duration
)
241 // Get the properties of this consumer
242 mlt_properties properties
= this->properties
;
243 mlt_audio_format afmt
= mlt_audio_pcm
;
245 // Set the preferred params of the test card signal
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" );
252 int samples
= mlt_sample_calculator( mlt_properties_get_double( this->properties
, "fps" ), frequency
, counter
++ );
257 mlt_frame_get_audio( frame
, &pcm
, &afmt
, &frequency
, &channels
, &samples
);
258 *duration
= ( ( samples
* 1000 ) / frequency
);
260 if ( mlt_properties_get_int( properties
, "audio_off" ) )
266 if ( init_audio
== 1 )
268 SDL_AudioSpec request
;
271 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY
, SDL_DEFAULT_REPEAT_INTERVAL
);
272 SDL_EnableUNICODE( 1 );
274 // specify audio format
275 memset( &request
, 0, sizeof( SDL_AudioSpec
) );
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 )
285 fprintf( stderr
, "SDL failed to open audio: %s\n", SDL_GetError() );
288 else if ( got
.size
!= 0 )
295 if ( init_audio
== 0 )
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
);
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
);
318 static int consumer_play_video( consumer_sdl
this, mlt_frame frame
, int64_t elapsed
, int skip
, int64_t playtime
)
320 // Get the properties of this consumer
321 mlt_properties properties
= this->properties
;
323 mlt_image_format vfmt
= mlt_image_yuv422
;
324 int width
= this->width
, height
= this->height
;
329 if ( mlt_properties_get_int( properties
, "video_off" ) )
331 mlt_frame_close( frame
);
336 if ( this->sdl_screen
!= NULL
)
340 changed
= consumer_get_dimensions( &this->window_width
, &this->window_height
);
342 while ( SDL_PollEvent( &event
) )
346 case SDL_VIDEORESIZE
:
347 this->window_width
= event
.resize
.w
;
348 this->window_height
= event
.resize
.h
;
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 )
358 keyboard
[ 0 ] = ( char )event
.key
.keysym
.unicode
;
359 callback( producer
, keyboard
);
368 mlt_properties_set_int( mlt_frame_properties( frame
), "skip", skip
);
369 mlt_properties_set_position( mlt_frame_properties( frame
), "playtime", playtime
);
371 // Push this frame to the back of the queue
372 mlt_deque_push_back( this->queue
, frame
);
377 // We might want to use an old frame if the current frame is skipped
378 mlt_frame candidate
= NULL
;
380 while ( frame
== NULL
&& mlt_deque_count( this->queue
) )
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" );
386 // Check if frame is in the future or past
389 frame
= mlt_deque_pop_front( this->queue
);
390 mlt_frame_close( frame
);
393 else if ( playtime
> elapsed
)
395 // no frame to show or remove
399 else if ( playtime
< elapsed
- 40 )
401 if ( candidate
!= NULL
)
402 mlt_frame_close( candidate
);
403 candidate
= mlt_deque_pop_front( this->queue
);
408 // Get the frame at the front of the queue
409 frame
= mlt_deque_pop_front( this->queue
);
415 else if ( candidate
!= NULL
)
416 mlt_frame_close( candidate
);
419 if ( this->playing
&& frame
!= NULL
)
421 // Get the image, width and height
422 mlt_frame_get_image( frame
, &image
, &vfmt
, &width
, &height
, 0 );
424 if ( width
!= this->width
|| height
!= this->height
)
427 this->height
= height
;
431 if ( this->sdl_screen
== NULL
|| changed
)
433 double aspect_ratio
= mlt_frame_get_aspect_ratio( frame
);
434 float display_aspect_ratio
= (float)width
/ (float)height
;
437 if ( mlt_properties_get_double( properties
, "aspect_ratio" ) )
438 aspect_ratio
= mlt_properties_get_double( properties
, "aspect_ratio" );
440 if ( aspect_ratio
== 1 )
442 rect
.w
= this->window_width
;
443 rect
.h
= this->window_height
;
445 else if ( this->window_width
< this->window_height
* aspect_ratio
)
447 rect
.w
= this->window_width
;
448 rect
.h
= this->window_width
/ aspect_ratio
;
452 rect
.w
= this->window_height
* aspect_ratio
;
453 rect
.h
= this->window_height
;
456 if ( mlt_properties_get_int( properties
, "scale_overlay" ) )
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
);
464 rect
.x
= ( this->window_width
- rect
.w
) / 2;
465 rect
.y
= ( this->window_height
- rect
.h
) / 2;
467 // Force an overlay recreation
468 if ( this->sdl_overlay
!= NULL
)
469 SDL_FreeYUVOverlay( this->sdl_overlay
);
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
);
474 if ( this->sdl_screen
!= NULL
)
476 SDL_SetClipRect( this->sdl_screen
, &rect
);
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();
484 if ( this->sdl_screen
!= NULL
&& this->sdl_overlay
!= NULL
)
486 this->buffer
= this->sdl_overlay
->pixels
[ 0 ];
487 if ( SDL_LockYUVOverlay( this->sdl_overlay
) >= 0 )
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
);
498 mlt_frame_close( frame
);
500 if ( mlt_deque_count( this->queue
) && !skip
)
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 );
512 /** Threaded wrapper for pipe.
515 static void *consumer_thread( void *arg
)
518 consumer_sdl
this = arg
;
521 mlt_consumer consumer
= &this->parent
;
523 // internal intialization
526 // Obtain time of thread start
531 int64_t playtime
= 0;
534 if ( SDL_Init( SDL_INIT_VIDEO
| SDL_INIT_AUDIO
| SDL_INIT_NOPARACHUTE
) < 0 )
536 fprintf( stderr
, "Failed to initialize SDL: %s\n", SDL_GetError() );
540 // Loop until told not to
541 while( this->running
)
543 // Get a frame from the attached producer
544 mlt_frame frame
= mlt_consumer_get_frame( consumer
);
546 // Ensure that we have a frame
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 ) );
556 init_audio
= consumer_play_audio( this, frame
, init_audio
, &duration
);
560 // Get the current time
563 // Determine elapsed time
565 start
= ( int64_t )now
.time
* 1000 + now
.millitm
;
567 elapsed
= ( ( int64_t )now
.time
* 1000 + now
.millitm
) - start
;
569 skip
= playtime
< elapsed
;
572 start
= start
+ ( elapsed
- playtime
);
575 consumer_play_video( this, frame
, elapsed
, skip
, playtime
);
577 playtime
+= duration
;
582 if ( init_audio
== 0 )
584 if ( this->sdl_overlay
!= NULL
)
585 SDL_FreeYUVOverlay( this->sdl_overlay
);
588 while( mlt_deque_count( this->queue
) )
589 mlt_frame_close( mlt_deque_pop_back( this->queue
) );
591 this->sdl_screen
= NULL
;
592 this->sdl_overlay
= NULL
;
593 this->audio_avail
= 0;
598 static int consumer_get_dimensions( int *width
, int *height
)
602 // SDL windows manager structure
605 // Specify the SDL Version
606 SDL_VERSION( &wm
.version
);
608 // Get the wm structure
609 if ( SDL_GetWMInfo( &wm
) == 1 )
611 // Check that we have the X11 wm
612 if ( wm
.subsystem
== SDL_SYSWM_X11
)
614 // Get the SDL window
615 Window window
= wm
.info
.x11
.window
;
617 // Get the display session
618 Display
*display
= wm
.info
.x11
.display
;
620 // Get the window attributes
621 XWindowAttributes attr
;
622 XGetWindowAttributes( display
, window
, &attr
);
624 // Determine whether window has changed
625 changed
= *width
!= attr
.width
|| *height
!= attr
.height
;
627 // Return width and height
629 *height
= attr
.height
;
636 /** Callback to allow override of the close method.
639 static void consumer_close( mlt_consumer parent
)
641 // Get the actual object
642 consumer_sdl
this = parent
->child
;
645 mlt_consumer_stop( parent
);
648 pthread_mutex_destroy( &this->audio_mutex
);
649 pthread_cond_destroy( &this->audio_cond
);
651 // Now clean up the rest
652 mlt_consumer_close( parent
);
654 // Finally clean up this