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>
28 #include <SDL/SDL_syswm.h>
30 /** This classes definition.
33 typedef struct consumer_sdl_s
*consumer_sdl
;
37 struct mlt_consumer_s parent
;
38 mlt_properties properties
;
43 uint8_t audio_buffer
[ 4096 * 3 ];
45 pthread_mutex_t audio_mutex
;
46 pthread_cond_t audio_cond
;
57 SDL_Surface
*sdl_screen
;
58 SDL_Overlay
*sdl_overlay
;
62 /** Forward references to static functions.
65 static int consumer_start( mlt_consumer parent
);
66 static int consumer_stop( mlt_consumer parent
);
67 static int consumer_is_stopped( mlt_consumer parent
);
68 static void consumer_close( mlt_consumer parent
);
69 static void *consumer_thread( void * );
70 static int consumer_get_dimensions( int *width
, int *height
);
72 /** This is what will be called by the factory - anything can be passed in
73 via the argument, but keep it simple.
76 mlt_consumer
consumer_sdl_init( char *arg
)
78 // Create the consumer object
79 consumer_sdl
this = calloc( sizeof( struct consumer_sdl_s
), 1 );
81 // If no malloc'd and consumer init ok
82 if ( this != NULL
&& mlt_consumer_init( &this->parent
, this ) == 0 )
84 // Get the parent consumer object
85 mlt_consumer parent
= &this->parent
;
87 // We have stuff to clean up, so override the close method
88 parent
->close
= consumer_close
;
90 // get a handle on properties
91 mlt_service service
= mlt_consumer_service( parent
);
92 this->properties
= mlt_service_properties( service
);
94 // Set the default volume
95 mlt_properties_set_double( this->properties
, "volume", 1.0 );
97 // This is the initialisation of the consumer
98 pthread_mutex_init( &this->audio_mutex
, NULL
);
99 pthread_cond_init( &this->audio_cond
, NULL
);
102 mlt_properties_set_double( this->properties
, "fps", 25 );
104 // Default scaler (for now we'll use nearest)
105 mlt_properties_set( this->properties
, "rescale", "nearest" );
107 // process actual param
108 if ( arg
== NULL
|| !strcmp( arg
, "PAL" ) )
113 else if ( !strcmp( arg
, "NTSC" ) )
117 mlt_properties_set_double( this->properties
, "fps", 29.97 );
119 else if ( sscanf( arg
, "%dx%d", &this->width
, &this->height
) != 2 )
125 // Default window size and aspect ratio
126 this->aspect_ratio
= 4.0 / 3.0;
127 this->window_width
= (int)( (float)this->height
* this->aspect_ratio
) + 1;
128 this->window_height
= this->height
;
131 this->sdl_flags
= SDL_HWSURFACE
| SDL_DOUBLEBUF
| SDL_HWACCEL
| SDL_RESIZABLE
;
133 // Allow thread to be started/stopped
134 parent
->start
= consumer_start
;
135 parent
->stop
= consumer_stop
;
136 parent
->is_stopped
= consumer_is_stopped
;
138 // Return the consumer produced
142 // malloc or consumer init failed
149 int consumer_start( mlt_consumer parent
)
151 consumer_sdl
this = parent
->child
;
153 if ( !this->running
)
156 pthread_create( &this->thread
, NULL
, consumer_thread
, this );
162 int consumer_stop( mlt_consumer parent
)
164 // Get the actual object
165 consumer_sdl
this = parent
->child
;
169 // Kill the thread and clean up
172 pthread_mutex_lock( &this->audio_mutex
);
173 pthread_cond_broadcast( &this->audio_cond
);
174 pthread_mutex_unlock( &this->audio_mutex
);
176 pthread_join( this->thread
, NULL
);
182 int consumer_is_stopped( mlt_consumer parent
)
184 consumer_sdl
this = parent
->child
;
185 return !this->running
;
188 static int sdl_lock_display( )
190 SDL_Surface
*screen
= SDL_GetVideoSurface( );
191 return screen
!= NULL
&& ( !SDL_MUSTLOCK( screen
) || SDL_LockSurface( screen
) >= 0 );
194 static void sdl_unlock_display( )
196 SDL_Surface
*screen
= SDL_GetVideoSurface( );
197 if ( screen
!= NULL
&& SDL_MUSTLOCK( screen
) )
198 SDL_UnlockSurface( screen
);
201 static void sdl_fill_audio( void *udata
, uint8_t *stream
, int len
)
203 consumer_sdl
this = udata
;
206 float volume
= mlt_properties_get_double( this->properties
, "volume" );
208 pthread_mutex_lock( &this->audio_mutex
);
210 // Block until audio received
211 while ( this->running
&& len
> this->audio_avail
)
212 pthread_cond_wait( &this->audio_cond
, &this->audio_mutex
);
214 if ( this->audio_avail
>= len
)
216 // Place in the audio buffer
217 SDL_MixAudio( stream
, this->audio_buffer
, len
, ( int )( ( float )SDL_MIX_MAXVOLUME
* volume
) );
219 // Remove len from the audio available
220 this->audio_avail
-= len
;
222 // Remove the samples
223 memmove( this->audio_buffer
, this->audio_buffer
+ len
, this->audio_avail
);
227 // Just to be safe, wipe the stream first
228 memset( stream
, 0, len
);
230 // Copy what we have into the stream
231 memcpy( stream
, this->audio_buffer
, this->audio_avail
);
234 SDL_MixAudio( stream
, stream
, len
, ( int )( ( float )SDL_MIX_MAXVOLUME
* volume
) );
237 this->audio_avail
= 0;
240 // We're definitely playing now
243 pthread_cond_broadcast( &this->audio_cond
);
244 pthread_mutex_unlock( &this->audio_mutex
);
247 static int consumer_play_audio( consumer_sdl
this, mlt_frame frame
, int init_audio
)
249 // Get the properties of this consumer
250 mlt_properties properties
= this->properties
;
251 mlt_audio_format afmt
= mlt_audio_pcm
;
253 // Set the preferred params of the test card signal
255 int frequency
= 48000;
256 static int counter
= 0;
257 if ( mlt_properties_get_int( properties
, "frequency" ) != 0 )
258 frequency
= mlt_properties_get_int( properties
, "frequency" );
260 int samples
= mlt_sample_calculator( mlt_properties_get_double( this->properties
, "fps" ), frequency
, counter
++ );
265 mlt_frame_get_audio( frame
, &pcm
, &afmt
, &frequency
, &channels
, &samples
);
267 if ( mlt_properties_get_int( properties
, "audio_off" ) )
273 if ( init_audio
== 1 )
275 SDL_AudioSpec request
;
278 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY
, SDL_DEFAULT_REPEAT_INTERVAL
);
279 SDL_EnableUNICODE( 1 );
281 // specify audio format
282 memset( &request
, 0, sizeof( SDL_AudioSpec
) );
284 request
.freq
= frequency
;
285 request
.format
= AUDIO_S16
;
286 request
.channels
= channels
;
287 request
.samples
= 1024;
288 request
.callback
= sdl_fill_audio
;
289 request
.userdata
= (void *)this;
290 if ( SDL_OpenAudio( &request
, &got
) != 0 )
292 fprintf( stderr
, "SDL failed to open audio: %s\n", SDL_GetError() );
295 else if ( got
.size
!= 0 )
302 if ( init_audio
== 0 )
304 bytes
= ( samples
* channels
* 2 );
305 pthread_mutex_lock( &this->audio_mutex
);
306 while ( bytes
> ( sizeof( this->audio_buffer
) - this->audio_avail
) )
307 pthread_cond_wait( &this->audio_cond
, &this->audio_mutex
);
308 mlt_properties properties
= mlt_frame_properties( frame
);
309 if ( mlt_properties_get_double( properties
, "_speed" ) == 1 )
310 memcpy( &this->audio_buffer
[ this->audio_avail
], pcm
, bytes
);
312 memset( &this->audio_buffer
[ this->audio_avail
], 0, bytes
);
313 this->audio_avail
+= bytes
;
314 pthread_cond_broadcast( &this->audio_cond
);
315 pthread_mutex_unlock( &this->audio_mutex
);
325 static int consumer_play_video( consumer_sdl
this, mlt_frame frame
)
327 // Get the properties of this consumer
328 mlt_properties properties
= this->properties
;
330 mlt_image_format vfmt
= mlt_image_yuv422
;
331 int width
= this->width
, height
= this->height
;
335 if ( mlt_properties_get_int( properties
, "video_off" ) )
337 mlt_frame_close( frame
);
341 if ( this->count
== this->size
)
344 this->queue
= realloc( this->queue
, sizeof( mlt_frame
) * this->size
);
346 this->queue
[ this->count
++ ] = frame
;
348 if ( mlt_properties_get( properties
, "rescale" ) != NULL
)
349 mlt_properties_set( mlt_frame_properties( frame
), "rescale.interp", mlt_properties_get( properties
, "rescale" ) );
353 // We're working on the oldest frame now
354 frame
= this->queue
[ 0 ];
356 // Shunt the frames in the queue down
358 for ( i
= 1; i
< this->count
; i
++ )
359 this->queue
[ i
- 1 ] = this->queue
[ i
];
362 // Get the image, width and height
363 mlt_frame_get_image( frame
, &image
, &vfmt
, &width
, &height
, 0 );
365 if ( this->sdl_screen
!= NULL
)
369 changed
= consumer_get_dimensions( &this->window_width
, &this->window_height
);
371 while ( SDL_PollEvent( &event
) )
375 case SDL_VIDEORESIZE
:
376 this->window_width
= event
.resize
.w
;
377 this->window_height
= event
.resize
.h
;
382 mlt_producer producer
= mlt_properties_get_data( properties
, "transport_producer", NULL
);
383 char keyboard
[ 2 ] = " ";
384 void (*callback
)( mlt_producer
, char * ) = mlt_properties_get_data( properties
, "transport_callback", NULL
);
385 if ( callback
!= NULL
&& producer
!= NULL
&& event
.key
.keysym
.unicode
< 0x80 && event
.key
.keysym
.unicode
> 0 )
387 keyboard
[ 0 ] = ( char )event
.key
.keysym
.unicode
;
388 callback( producer
, keyboard
);
397 if ( width
!= this->width
|| height
!= this->height
)
400 this->height
= height
;
404 if ( this->sdl_screen
== NULL
|| changed
)
406 double aspect_ratio
= mlt_frame_get_aspect_ratio( frame
);
407 float display_aspect_ratio
= (float)width
/ (float)height
;
410 if ( mlt_properties_get_double( properties
, "aspect_ratio" ) )
411 aspect_ratio
= mlt_properties_get_double( properties
, "aspect_ratio" );
413 if ( aspect_ratio
== 1 )
415 rect
.w
= this->window_width
;
416 rect
.h
= this->window_height
;
418 else if ( this->window_width
< this->window_height
* aspect_ratio
)
420 rect
.w
= this->window_width
;
421 rect
.h
= this->window_width
/ aspect_ratio
;
425 rect
.w
= this->window_height
* aspect_ratio
;
426 rect
.h
= this->window_height
;
429 if ( mlt_properties_get_int( properties
, "scale_overlay" ) )
431 if ( ( float )rect
.w
* display_aspect_ratio
< this->window_width
)
432 rect
.w
= ( int )( ( float )rect
.w
* display_aspect_ratio
);
433 else if ( ( float )rect
.h
* display_aspect_ratio
< this->window_height
)
434 rect
.h
= ( int )( ( float )rect
.h
* display_aspect_ratio
);
437 rect
.x
= ( this->window_width
- rect
.w
) / 2;
438 rect
.y
= ( this->window_height
- rect
.h
) / 2;
440 // Force an overlay recreation
441 if ( this->sdl_overlay
!= NULL
)
442 SDL_FreeYUVOverlay( this->sdl_overlay
);
444 // open SDL window with video overlay, if possible
445 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
447 if ( this->sdl_screen
!= NULL
)
449 SDL_SetClipRect( this->sdl_screen
, &rect
);
452 this->sdl_overlay
= SDL_CreateYUVOverlay( this->width
- (this->width
% 4), this->height
- (this->height
% 2 ), SDL_YUY2_OVERLAY
, this->sdl_screen
);
453 sdl_unlock_display();
457 if ( this->sdl_screen
!= NULL
&& this->sdl_overlay
!= NULL
)
459 this->buffer
= this->sdl_overlay
->pixels
[ 0 ];
460 if ( SDL_LockYUVOverlay( this->sdl_overlay
) >= 0 )
462 mlt_resize_yuv422( this->buffer
, this->width
- (this->width
% 4 ), this->height
- (this->height
% 2 ), image
, width
, height
);
463 SDL_UnlockYUVOverlay( this->sdl_overlay
);
464 SDL_DisplayYUVOverlay( this->sdl_overlay
, &this->sdl_screen
->clip_rect
);
475 mlt_frame_close( frame
);
478 mlt_frame_get_image( this->queue
[ this->count
- 1 ], &image
, &vfmt
, &width
, &height
, 0 );
483 /** Threaded wrapper for pipe.
486 static void *consumer_thread( void *arg
)
489 consumer_sdl
this = arg
;
492 mlt_consumer consumer
= &this->parent
;
494 // Get the service assoicated to the consumer
495 mlt_service service
= mlt_consumer_service( consumer
);
497 // Define a frame pointer
500 // internal intialization
503 if ( SDL_Init( SDL_INIT_VIDEO
| SDL_INIT_AUDIO
| SDL_INIT_NOPARACHUTE
) < 0 )
505 fprintf( stderr
, "Failed to initialize SDL: %s\n", SDL_GetError() );
509 // Loop until told not to
510 while( this->running
)
512 // Get a frame from the service (should never return anything other than 0)
513 if ( mlt_service_get_frame( service
, &frame
, 0 ) == 0 )
515 init_audio
= consumer_play_audio( this, frame
, init_audio
);
516 consumer_play_video( this, frame
);
521 if ( init_audio
== 0 )
523 if ( this->sdl_overlay
!= NULL
)
524 SDL_FreeYUVOverlay( this->sdl_overlay
);
527 this->sdl_screen
= NULL
;
528 this->sdl_overlay
= NULL
;
529 this->audio_avail
= 0;
534 static int consumer_get_dimensions( int *width
, int *height
)
538 // SDL windows manager structure
541 // Specify the SDL Version
542 SDL_VERSION( &wm
.version
);
544 // Get the wm structure
545 if ( SDL_GetWMInfo( &wm
) == 1 )
547 // Check that we have the X11 wm
548 if ( wm
.subsystem
== SDL_SYSWM_X11
)
550 // Get the SDL window
551 Window window
= wm
.info
.x11
.window
;
553 // Get the display session
554 Display
*display
= wm
.info
.x11
.display
;
556 // Get the window attributes
557 XWindowAttributes attr
;
558 XGetWindowAttributes( display
, window
, &attr
);
560 // Determine whether window has changed
561 changed
= *width
!= attr
.width
|| *height
!= attr
.height
;
563 // Return width and height
565 *height
= attr
.height
;
572 /** Callback to allow override of the close method.
575 static void consumer_close( mlt_consumer parent
)
577 // Get the actual object
578 consumer_sdl
this = parent
->child
;
581 mlt_consumer_stop( parent
);
584 pthread_mutex_destroy( &this->audio_mutex
);
585 pthread_cond_destroy( &this->audio_cond
);
587 // Now clean up the rest
588 mlt_consumer_close( parent
);
590 // Finally clean up this