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
);
101 // Default scaler (for now we'll use nearest)
102 mlt_properties_set( this->properties
, "rescale", "nearest" );
105 this->aspect_ratio
= mlt_properties_get_double( this->properties
, "aspect_ratio" );
107 // process actual param
108 if ( arg
== NULL
|| sscanf( arg
, "%dx%d", &this->width
, &this->height
) != 2 )
110 this->width
= mlt_properties_get_int( this->properties
, "width" );
111 this->height
= mlt_properties_get_int( this->properties
, "height" );
114 // Default window size
115 this->window_width
= (int)( (float)this->height
* this->aspect_ratio
) + 1;
116 this->window_height
= this->height
;
119 this->sdl_flags
= SDL_HWSURFACE
| SDL_DOUBLEBUF
| SDL_HWACCEL
| SDL_RESIZABLE
;
121 // Allow thread to be started/stopped
122 parent
->start
= consumer_start
;
123 parent
->stop
= consumer_stop
;
124 parent
->is_stopped
= consumer_is_stopped
;
126 // Return the consumer produced
130 // malloc or consumer init failed
137 int consumer_start( mlt_consumer parent
)
139 consumer_sdl
this = parent
->child
;
141 if ( !this->running
)
144 pthread_create( &this->thread
, NULL
, consumer_thread
, this );
150 int consumer_stop( mlt_consumer parent
)
152 // Get the actual object
153 consumer_sdl
this = parent
->child
;
157 // Kill the thread and clean up
160 pthread_mutex_lock( &this->audio_mutex
);
161 pthread_cond_broadcast( &this->audio_cond
);
162 pthread_mutex_unlock( &this->audio_mutex
);
164 pthread_join( this->thread
, NULL
);
170 int consumer_is_stopped( mlt_consumer parent
)
172 consumer_sdl
this = parent
->child
;
173 return !this->running
;
176 static int sdl_lock_display( )
178 SDL_Surface
*screen
= SDL_GetVideoSurface( );
179 return screen
!= NULL
&& ( !SDL_MUSTLOCK( screen
) || SDL_LockSurface( screen
) >= 0 );
182 static void sdl_unlock_display( )
184 SDL_Surface
*screen
= SDL_GetVideoSurface( );
185 if ( screen
!= NULL
&& SDL_MUSTLOCK( screen
) )
186 SDL_UnlockSurface( screen
);
189 static void sdl_fill_audio( void *udata
, uint8_t *stream
, int len
)
191 consumer_sdl
this = udata
;
194 float volume
= mlt_properties_get_double( this->properties
, "volume" );
196 pthread_mutex_lock( &this->audio_mutex
);
198 // Block until audio received
199 while ( this->running
&& len
> this->audio_avail
)
200 pthread_cond_wait( &this->audio_cond
, &this->audio_mutex
);
202 if ( this->audio_avail
>= len
)
204 // Place in the audio buffer
205 SDL_MixAudio( stream
, this->audio_buffer
, len
, ( int )( ( float )SDL_MIX_MAXVOLUME
* volume
) );
207 // Remove len from the audio available
208 this->audio_avail
-= len
;
210 // Remove the samples
211 memmove( this->audio_buffer
, this->audio_buffer
+ len
, this->audio_avail
);
215 // Just to be safe, wipe the stream first
216 memset( stream
, 0, len
);
218 // Copy what we have into the stream
219 memcpy( stream
, this->audio_buffer
, this->audio_avail
);
222 SDL_MixAudio( stream
, stream
, len
, ( int )( ( float )SDL_MIX_MAXVOLUME
* volume
) );
225 this->audio_avail
= 0;
228 // We're definitely playing now
231 pthread_cond_broadcast( &this->audio_cond
);
232 pthread_mutex_unlock( &this->audio_mutex
);
235 static int consumer_play_audio( consumer_sdl
this, mlt_frame frame
, int init_audio
)
237 // Get the properties of this consumer
238 mlt_properties properties
= this->properties
;
239 mlt_audio_format afmt
= mlt_audio_pcm
;
241 // Set the preferred params of the test card signal
243 int frequency
= 48000;
244 static int counter
= 0;
245 if ( mlt_properties_get_int( properties
, "frequency" ) != 0 )
246 frequency
= mlt_properties_get_int( properties
, "frequency" );
248 int samples
= mlt_sample_calculator( mlt_properties_get_double( this->properties
, "fps" ), frequency
, counter
++ );
253 mlt_frame_get_audio( frame
, &pcm
, &afmt
, &frequency
, &channels
, &samples
);
255 if ( mlt_properties_get_int( properties
, "audio_off" ) )
261 if ( init_audio
== 1 )
263 SDL_AudioSpec request
;
266 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY
, SDL_DEFAULT_REPEAT_INTERVAL
);
267 SDL_EnableUNICODE( 1 );
269 // specify audio format
270 memset( &request
, 0, sizeof( SDL_AudioSpec
) );
272 request
.freq
= frequency
;
273 request
.format
= AUDIO_S16
;
274 request
.channels
= channels
;
275 request
.samples
= 1024;
276 request
.callback
= sdl_fill_audio
;
277 request
.userdata
= (void *)this;
278 if ( SDL_OpenAudio( &request
, &got
) != 0 )
280 fprintf( stderr
, "SDL failed to open audio: %s\n", SDL_GetError() );
283 else if ( got
.size
!= 0 )
290 if ( init_audio
== 0 )
292 bytes
= ( samples
* channels
* 2 );
293 pthread_mutex_lock( &this->audio_mutex
);
294 while ( bytes
> ( sizeof( this->audio_buffer
) - this->audio_avail
) )
295 pthread_cond_wait( &this->audio_cond
, &this->audio_mutex
);
296 mlt_properties properties
= mlt_frame_properties( frame
);
297 if ( mlt_properties_get_double( properties
, "_speed" ) == 1 )
298 memcpy( &this->audio_buffer
[ this->audio_avail
], pcm
, bytes
);
300 memset( &this->audio_buffer
[ this->audio_avail
], 0, bytes
);
301 this->audio_avail
+= bytes
;
302 pthread_cond_broadcast( &this->audio_cond
);
303 pthread_mutex_unlock( &this->audio_mutex
);
313 static int consumer_play_video( consumer_sdl
this, mlt_frame frame
)
315 // Get the properties of this consumer
316 mlt_properties properties
= this->properties
;
318 mlt_image_format vfmt
= mlt_image_yuv422
;
319 int width
= this->width
, height
= this->height
;
323 if ( mlt_properties_get_int( properties
, "video_off" ) )
325 mlt_frame_close( frame
);
329 if ( this->count
== this->size
)
332 this->queue
= realloc( this->queue
, sizeof( mlt_frame
) * this->size
);
334 this->queue
[ this->count
++ ] = frame
;
338 // We're working on the oldest frame now
339 frame
= this->queue
[ 0 ];
341 // Shunt the frames in the queue down
343 for ( i
= 1; i
< this->count
; i
++ )
344 this->queue
[ i
- 1 ] = this->queue
[ i
];
347 // Get the image, width and height
348 mlt_frame_get_image( frame
, &image
, &vfmt
, &width
, &height
, 0 );
350 if ( this->sdl_screen
!= NULL
)
354 changed
= consumer_get_dimensions( &this->window_width
, &this->window_height
);
356 while ( SDL_PollEvent( &event
) )
360 case SDL_VIDEORESIZE
:
361 this->window_width
= event
.resize
.w
;
362 this->window_height
= event
.resize
.h
;
367 mlt_producer producer
= mlt_properties_get_data( properties
, "transport_producer", NULL
);
368 char keyboard
[ 2 ] = " ";
369 void (*callback
)( mlt_producer
, char * ) = mlt_properties_get_data( properties
, "transport_callback", NULL
);
370 if ( callback
!= NULL
&& producer
!= NULL
&& event
.key
.keysym
.unicode
< 0x80 && event
.key
.keysym
.unicode
> 0 )
372 keyboard
[ 0 ] = ( char )event
.key
.keysym
.unicode
;
373 callback( producer
, keyboard
);
382 if ( width
!= this->width
|| height
!= this->height
)
385 this->height
= height
;
389 if ( this->sdl_screen
== NULL
|| changed
)
391 double aspect_ratio
= mlt_frame_get_aspect_ratio( frame
);
392 float display_aspect_ratio
= (float)width
/ (float)height
;
395 if ( mlt_properties_get_double( properties
, "aspect_ratio" ) )
396 aspect_ratio
= mlt_properties_get_double( properties
, "aspect_ratio" );
398 if ( aspect_ratio
== 1 )
400 rect
.w
= this->window_width
;
401 rect
.h
= this->window_height
;
403 else if ( this->window_width
< this->window_height
* aspect_ratio
)
405 rect
.w
= this->window_width
;
406 rect
.h
= this->window_width
/ aspect_ratio
;
410 rect
.w
= this->window_height
* aspect_ratio
;
411 rect
.h
= this->window_height
;
414 if ( mlt_properties_get_int( properties
, "scale_overlay" ) )
416 if ( ( float )rect
.w
* display_aspect_ratio
< this->window_width
)
417 rect
.w
= ( int )( ( float )rect
.w
* display_aspect_ratio
);
418 else if ( ( float )rect
.h
* display_aspect_ratio
< this->window_height
)
419 rect
.h
= ( int )( ( float )rect
.h
* display_aspect_ratio
);
422 rect
.x
= ( this->window_width
- rect
.w
) / 2;
423 rect
.y
= ( this->window_height
- rect
.h
) / 2;
425 // Force an overlay recreation
426 if ( this->sdl_overlay
!= NULL
)
427 SDL_FreeYUVOverlay( this->sdl_overlay
);
429 // open SDL window with video overlay, if possible
430 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
432 if ( this->sdl_screen
!= NULL
)
434 SDL_SetClipRect( this->sdl_screen
, &rect
);
437 this->sdl_overlay
= SDL_CreateYUVOverlay( this->width
- (this->width
% 4), this->height
- (this->height
% 2 ), SDL_YUY2_OVERLAY
, this->sdl_screen
);
438 sdl_unlock_display();
442 if ( this->sdl_screen
!= NULL
&& this->sdl_overlay
!= NULL
)
444 this->buffer
= this->sdl_overlay
->pixels
[ 0 ];
445 if ( SDL_LockYUVOverlay( this->sdl_overlay
) >= 0 )
447 mlt_resize_yuv422( this->buffer
, this->width
- (this->width
% 4 ), this->height
- (this->height
% 2 ), image
, width
, height
);
448 SDL_UnlockYUVOverlay( this->sdl_overlay
);
449 SDL_DisplayYUVOverlay( this->sdl_overlay
, &this->sdl_screen
->clip_rect
);
460 mlt_frame_close( frame
);
464 // Tell the producers about our scale relative to the normalisation
465 mlt_properties_set_double( mlt_frame_properties( this->queue
[ this->count
- 1 ] ), "consumer_scale",
466 ( double )height
/ mlt_properties_get_double( properties
, "height" ) );
467 mlt_frame_get_image( this->queue
[ this->count
- 1 ], &image
, &vfmt
, &width
, &height
, 0 );
473 /** Threaded wrapper for pipe.
476 static void *consumer_thread( void *arg
)
479 consumer_sdl
this = arg
;
482 mlt_consumer consumer
= &this->parent
;
484 // internal intialization
487 if ( SDL_Init( SDL_INIT_VIDEO
| SDL_INIT_AUDIO
| SDL_INIT_NOPARACHUTE
) < 0 )
489 fprintf( stderr
, "Failed to initialize SDL: %s\n", SDL_GetError() );
493 // Loop until told not to
494 while( this->running
)
496 // Get a frame from the attached producer
497 mlt_frame frame
= mlt_consumer_get_frame( consumer
);
499 // Ensure that we have a frame
502 // SDL adapts display aspect, but set this so pixel aspect can be normalised
503 // mlt_properties_set_double( mlt_frame_properties( frame ), "consumer_aspect_ratio",
504 // mlt_frame_get_aspect_ratio( frame ) );
506 init_audio
= consumer_play_audio( this, frame
, init_audio
);
507 consumer_play_video( this, frame
);
512 if ( init_audio
== 0 )
514 if ( this->sdl_overlay
!= NULL
)
515 SDL_FreeYUVOverlay( this->sdl_overlay
);
518 while( -- this->count
>= 0 )
519 mlt_frame_close( this->queue
[ this->count
] );
521 this->sdl_screen
= NULL
;
522 this->sdl_overlay
= NULL
;
523 this->audio_avail
= 0;
528 static int consumer_get_dimensions( int *width
, int *height
)
532 // SDL windows manager structure
535 // Specify the SDL Version
536 SDL_VERSION( &wm
.version
);
538 // Get the wm structure
539 if ( SDL_GetWMInfo( &wm
) == 1 )
541 // Check that we have the X11 wm
542 if ( wm
.subsystem
== SDL_SYSWM_X11
)
544 // Get the SDL window
545 Window window
= wm
.info
.x11
.window
;
547 // Get the display session
548 Display
*display
= wm
.info
.x11
.display
;
550 // Get the window attributes
551 XWindowAttributes attr
;
552 XGetWindowAttributes( display
, window
, &attr
);
554 // Determine whether window has changed
555 changed
= *width
!= attr
.width
|| *height
!= attr
.height
;
557 // Return width and height
559 *height
= attr
.height
;
566 /** Callback to allow override of the close method.
569 static void consumer_close( mlt_consumer parent
)
571 // Get the actual object
572 consumer_sdl
this = parent
->child
;
575 mlt_consumer_stop( parent
);
578 pthread_mutex_destroy( &this->audio_mutex
);
579 pthread_cond_destroy( &this->audio_cond
);
581 // Now clean up the rest
582 mlt_consumer_close( parent
);
584 // Finally clean up this