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 // process actual param
105 if ( arg
== NULL
|| !strcmp( arg
, "PAL" ) )
110 else if ( !strcmp( arg
, "NTSC" ) )
114 mlt_properties_set_double( this->properties
, "fps", 29.97 );
116 else if ( sscanf( arg
, "%dx%d", &this->width
, &this->height
) != 2 )
122 // Default window size and aspect ratio
123 this->aspect_ratio
= 4.0 / 3.0;
124 this->window_width
= (int)( (float)this->height
* this->aspect_ratio
) + 1;
125 this->window_height
= this->height
;
128 this->sdl_flags
= SDL_HWSURFACE
| SDL_DOUBLEBUF
| SDL_HWACCEL
| SDL_RESIZABLE
;
130 // Allow thread to be started/stopped
131 parent
->start
= consumer_start
;
132 parent
->stop
= consumer_stop
;
133 parent
->is_stopped
= consumer_is_stopped
;
135 // Return the consumer produced
139 // malloc or consumer init failed
146 int consumer_start( mlt_consumer parent
)
148 consumer_sdl
this = parent
->child
;
150 if ( !this->running
)
153 pthread_create( &this->thread
, NULL
, consumer_thread
, this );
159 int consumer_stop( mlt_consumer parent
)
161 // Get the actual object
162 consumer_sdl
this = parent
->child
;
166 // Kill the thread and clean up
169 pthread_mutex_lock( &this->audio_mutex
);
170 pthread_cond_broadcast( &this->audio_cond
);
171 pthread_mutex_unlock( &this->audio_mutex
);
173 pthread_join( this->thread
, NULL
);
179 int consumer_is_stopped( mlt_consumer parent
)
181 consumer_sdl
this = parent
->child
;
182 return !this->running
;
185 static int sdl_lock_display( )
187 SDL_Surface
*screen
= SDL_GetVideoSurface( );
188 return screen
!= NULL
&& ( !SDL_MUSTLOCK( screen
) || SDL_LockSurface( screen
) >= 0 );
191 static void sdl_unlock_display( )
193 SDL_Surface
*screen
= SDL_GetVideoSurface( );
194 if ( screen
!= NULL
&& SDL_MUSTLOCK( screen
) )
195 SDL_UnlockSurface( screen
);
198 static void sdl_fill_audio( void *udata
, uint8_t *stream
, int len
)
200 consumer_sdl
this = udata
;
203 float volume
= mlt_properties_get_double( this->properties
, "volume" );
205 pthread_mutex_lock( &this->audio_mutex
);
207 // Block until audio received
208 while ( this->running
&& len
> this->audio_avail
)
209 pthread_cond_wait( &this->audio_cond
, &this->audio_mutex
);
211 if ( this->audio_avail
>= len
)
213 // Place in the audio buffer
214 SDL_MixAudio( stream
, this->audio_buffer
, len
, ( int )( ( float )SDL_MIX_MAXVOLUME
* volume
) );
216 // Remove len from the audio available
217 this->audio_avail
-= len
;
219 // Remove the samples
220 memmove( this->audio_buffer
, this->audio_buffer
+ len
, this->audio_avail
);
224 // Just to be safe, wipe the stream first
225 memset( stream
, 0, len
);
227 // Copy what we have into the stream
228 memcpy( stream
, this->audio_buffer
, this->audio_avail
);
231 SDL_MixAudio( stream
, stream
, len
, ( int )( ( float )SDL_MIX_MAXVOLUME
* volume
) );
234 this->audio_avail
= 0;
237 // We're definitely playing now
240 pthread_cond_broadcast( &this->audio_cond
);
241 pthread_mutex_unlock( &this->audio_mutex
);
244 static int consumer_play_audio( consumer_sdl
this, mlt_frame frame
, int init_audio
)
246 // Get the properties of this consumer
247 mlt_properties properties
= this->properties
;
248 mlt_audio_format afmt
= mlt_audio_pcm
;
250 // Set the preferred params of the test card signal
252 int frequency
= 48000;
253 static int counter
= 0;
254 int samples
= mlt_sample_calculator( mlt_properties_get_double( this->properties
, "fps" ), frequency
, counter
++ );
259 mlt_frame_get_audio( frame
, &pcm
, &afmt
, &frequency
, &channels
, &samples
);
261 if ( mlt_properties_get_int( properties
, "audio_off" ) )
267 if ( init_audio
== 1 )
269 SDL_AudioSpec request
;
272 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY
, SDL_DEFAULT_REPEAT_INTERVAL
);
273 SDL_EnableUNICODE( 1 );
275 // specify audio format
276 memset( &request
, 0, sizeof( SDL_AudioSpec
) );
278 request
.freq
= frequency
;
279 request
.format
= AUDIO_S16
;
280 request
.channels
= channels
;
281 request
.samples
= 1024;
282 request
.callback
= sdl_fill_audio
;
283 request
.userdata
= (void *)this;
284 if ( SDL_OpenAudio( &request
, &got
) != 0 )
286 fprintf( stderr
, "SDL failed to open audio: %s\n", SDL_GetError() );
289 else if ( got
.size
!= 0 )
296 if ( init_audio
== 0 )
298 bytes
= ( samples
* channels
* 2 );
299 pthread_mutex_lock( &this->audio_mutex
);
300 while ( bytes
> ( sizeof( this->audio_buffer
) - this->audio_avail
) )
301 pthread_cond_wait( &this->audio_cond
, &this->audio_mutex
);
302 mlt_properties properties
= mlt_frame_properties( frame
);
303 if ( mlt_properties_get_double( properties
, "speed" ) == 1 )
304 memcpy( &this->audio_buffer
[ this->audio_avail
], pcm
, bytes
);
306 memset( &this->audio_buffer
[ this->audio_avail
], 0, bytes
);
307 this->audio_avail
+= bytes
;
308 pthread_cond_broadcast( &this->audio_cond
);
309 pthread_mutex_unlock( &this->audio_mutex
);
319 static int consumer_play_video( consumer_sdl
this, mlt_frame frame
)
321 // Get the properties of this consumer
322 mlt_properties properties
= this->properties
;
324 mlt_image_format vfmt
= mlt_image_yuv422
;
325 int width
= this->width
, height
= this->height
;
329 if ( mlt_properties_get_int( properties
, "video_off" ) )
331 mlt_frame_close( frame
);
335 if ( this->count
== this->size
)
338 this->queue
= realloc( this->queue
, sizeof( mlt_frame
) * this->size
);
340 this->queue
[ this->count
++ ] = frame
;
344 // We're working on the oldest frame now
345 frame
= this->queue
[ 0 ];
347 // Shunt the frames in the queue down
349 for ( i
= 1; i
< this->count
; i
++ )
350 this->queue
[ i
- 1 ] = this->queue
[ i
];
353 // Get the image, width and height
354 mlt_frame_get_image( frame
, &image
, &vfmt
, &width
, &height
, 0 );
356 if ( this->sdl_screen
!= NULL
)
360 changed
= consumer_get_dimensions( &this->window_width
, &this->window_height
);
362 while ( SDL_PollEvent( &event
) )
366 case SDL_VIDEORESIZE
:
367 this->window_width
= event
.resize
.w
;
368 this->window_height
= event
.resize
.h
;
373 mlt_producer producer
= mlt_properties_get_data( properties
, "transport_producer", NULL
);
374 char keyboard
[ 2 ] = " ";
375 void (*callback
)( mlt_producer
, char * ) = mlt_properties_get_data( properties
, "transport_callback", NULL
);
376 if ( callback
!= NULL
&& producer
!= NULL
&& event
.key
.keysym
.unicode
< 0x80 && event
.key
.keysym
.unicode
> 0 )
378 keyboard
[ 0 ] = ( char )event
.key
.keysym
.unicode
;
379 callback( producer
, keyboard
);
388 if ( width
!= this->width
|| height
!= this->height
)
391 this->height
= height
;
395 if ( this->sdl_screen
== NULL
|| changed
)
397 double aspect_ratio
= mlt_frame_get_aspect_ratio( frame
);
398 float display_aspect_ratio
= (float)width
/ (float)height
;
401 if ( mlt_properties_get_double( properties
, "aspect_ratio" ) )
402 aspect_ratio
= mlt_properties_get_double( properties
, "aspect_ratio" );
404 if ( aspect_ratio
== 1 )
406 rect
.w
= this->window_width
;
407 rect
.h
= this->window_height
;
409 else if ( this->window_width
< this->window_height
* aspect_ratio
)
411 rect
.w
= this->window_width
;
412 rect
.h
= this->window_width
/ aspect_ratio
;
416 rect
.w
= this->window_height
* aspect_ratio
;
417 rect
.h
= this->window_height
;
420 if ( mlt_properties_get_int( properties
, "scale_overlay" ) )
422 if ( ( float )rect
.w
* display_aspect_ratio
< this->window_width
)
423 rect
.w
= ( int )( ( float )rect
.w
* display_aspect_ratio
);
424 else if ( ( float )rect
.h
* display_aspect_ratio
< this->window_height
)
425 rect
.h
= ( int )( ( float )rect
.h
* display_aspect_ratio
);
428 rect
.x
= ( this->window_width
- rect
.w
) / 2;
429 rect
.y
= ( this->window_height
- rect
.h
) / 2;
431 // Force an overlay recreation
432 if ( this->sdl_overlay
!= NULL
)
433 SDL_FreeYUVOverlay( this->sdl_overlay
);
435 // open SDL window with video overlay, if possible
436 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
438 if ( this->sdl_screen
!= NULL
)
440 SDL_SetClipRect( this->sdl_screen
, &rect
);
443 this->sdl_overlay
= SDL_CreateYUVOverlay( this->width
- (this->width
% 4), this->height
- (this->height
% 2 ), SDL_YUY2_OVERLAY
, this->sdl_screen
);
444 sdl_unlock_display();
448 if ( this->sdl_screen
!= NULL
&& this->sdl_overlay
!= NULL
)
450 this->buffer
= this->sdl_overlay
->pixels
[ 0 ];
451 if ( SDL_LockYUVOverlay( this->sdl_overlay
) >= 0 )
453 mlt_resize_yuv422( this->buffer
, this->width
- (this->width
% 4 ), this->height
- (this->height
% 2 ), image
, width
, height
);
454 SDL_UnlockYUVOverlay( this->sdl_overlay
);
455 SDL_DisplayYUVOverlay( this->sdl_overlay
, &this->sdl_screen
->clip_rect
);
466 mlt_frame_close( frame
);
469 mlt_frame_get_image( this->queue
[ this->count
- 1 ], &image
, &vfmt
, &width
, &height
, 0 );
474 /** Threaded wrapper for pipe.
477 static void *consumer_thread( void *arg
)
480 consumer_sdl
this = arg
;
483 mlt_consumer consumer
= &this->parent
;
485 // Get the service assoicated to the consumer
486 mlt_service service
= mlt_consumer_service( consumer
);
488 // Define a frame pointer
491 // internal intialization
494 if ( SDL_Init( SDL_INIT_VIDEO
| SDL_INIT_AUDIO
| SDL_INIT_NOPARACHUTE
) < 0 )
496 fprintf( stderr
, "Failed to initialize SDL: %s\n", SDL_GetError() );
500 // Loop until told not to
501 while( this->running
)
503 // Get a frame from the service (should never return anything other than 0)
504 if ( mlt_service_get_frame( service
, &frame
, 0 ) == 0 )
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 this->sdl_screen
= NULL
;
519 this->sdl_overlay
= NULL
;
520 this->audio_avail
= 0;
525 static int consumer_get_dimensions( int *width
, int *height
)
529 // SDL windows manager structure
532 // Specify the SDL Version
533 SDL_VERSION( &wm
.version
);
535 // Get the wm structure
536 if ( SDL_GetWMInfo( &wm
) == 1 )
538 // Check that we have the X11 wm
539 if ( wm
.subsystem
== SDL_SYSWM_X11
)
541 // Get the SDL window
542 Window window
= wm
.info
.x11
.window
;
544 // Get the display session
545 Display
*display
= wm
.info
.x11
.display
;
547 // Get the window attributes
548 XWindowAttributes attr
;
549 XGetWindowAttributes( display
, window
, &attr
);
551 // Determine whether window has changed
552 changed
= *width
!= attr
.width
|| *height
!= attr
.height
;
554 // Return width and height
556 *height
= attr
.height
;
563 /** Callback to allow override of the close method.
566 static void consumer_close( mlt_consumer parent
)
568 // Get the actual object
569 consumer_sdl
this = parent
->child
;
572 mlt_consumer_stop( parent
);
575 pthread_mutex_destroy( &this->audio_mutex
);
576 pthread_cond_destroy( &this->audio_cond
);
578 // Now clean up the rest
579 mlt_consumer_close( parent
);
581 // Finally clean up this