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
;
44 uint8_t audio_buffer
[ 4096 * 19 ];
46 pthread_mutex_t audio_mutex
;
47 pthread_cond_t audio_cond
;
55 SDL_Surface
*sdl_screen
;
56 SDL_Overlay
*sdl_overlay
;
61 /** Forward references to static functions.
64 static int consumer_start( mlt_consumer parent
);
65 static int consumer_stop( mlt_consumer parent
);
66 static int consumer_is_stopped( mlt_consumer parent
);
67 static void consumer_close( mlt_consumer parent
);
68 static void *consumer_thread( void * );
69 static int consumer_get_dimensions( int *width
, int *height
);
71 /** This is what will be called by the factory - anything can be passed in
72 via the argument, but keep it simple.
75 mlt_consumer
consumer_sdl_init( char *arg
)
77 // Create the consumer object
78 consumer_sdl
this = calloc( sizeof( struct consumer_sdl_s
), 1 );
80 // If no malloc'd and consumer init ok
81 if ( this != NULL
&& mlt_consumer_init( &this->parent
, this ) == 0 )
84 this->queue
= mlt_deque_init( );
86 // Get the parent consumer object
87 mlt_consumer parent
= &this->parent
;
89 // We have stuff to clean up, so override the close method
90 parent
->close
= consumer_close
;
92 // get a handle on properties
93 mlt_service service
= mlt_consumer_service( parent
);
94 this->properties
= mlt_service_properties( service
);
96 // Set the default volume
97 mlt_properties_set_double( this->properties
, "volume", 1.0 );
99 // This is the initialisation of the consumer
100 pthread_mutex_init( &this->audio_mutex
, NULL
);
101 pthread_cond_init( &this->audio_cond
, NULL
);
103 // Default scaler (for now we'll use nearest)
104 mlt_properties_set( this->properties
, "rescale", "nearest" );
106 // Default buffer for low latency
107 mlt_properties_set_int( this->properties
, "buffer", 8 );
109 // Default progressive true
110 mlt_properties_set_int( this->properties
, "progressive", 1 );
113 this->aspect_ratio
= mlt_properties_get_double( this->properties
, "aspect_ratio" );
115 // process actual param
116 if ( arg
== NULL
|| sscanf( arg
, "%dx%d", &this->width
, &this->height
) != 2 )
118 this->width
= mlt_properties_get_int( this->properties
, "width" );
119 this->height
= mlt_properties_get_int( this->properties
, "height" );
122 // Default window size
123 this->window_width
= (int)( (float)this->height
* 4.0/3.0 + 0.5);
124 this->window_height
= this->height
;
127 this->sdl_flags
= SDL_HWSURFACE
| SDL_ASYNCBLIT
| SDL_HWACCEL
| SDL_RESIZABLE
;
129 // Allow thread to be started/stopped
130 parent
->start
= consumer_start
;
131 parent
->stop
= consumer_stop
;
132 parent
->is_stopped
= consumer_is_stopped
;
134 // Return the consumer produced
138 // malloc or consumer init failed
145 int consumer_start( mlt_consumer parent
)
147 consumer_sdl
this = parent
->child
;
149 if ( !this->running
)
152 pthread_create( &this->thread
, NULL
, consumer_thread
, this );
158 int consumer_stop( mlt_consumer parent
)
160 // Get the actual object
161 consumer_sdl
this = parent
->child
;
165 // Kill the thread and clean up
168 pthread_mutex_lock( &this->audio_mutex
);
169 pthread_cond_broadcast( &this->audio_cond
);
170 pthread_mutex_unlock( &this->audio_mutex
);
172 pthread_join( this->thread
, NULL
);
178 int consumer_is_stopped( mlt_consumer parent
)
180 consumer_sdl
this = parent
->child
;
181 return !this->running
;
184 static int sdl_lock_display( )
186 SDL_Surface
*screen
= SDL_GetVideoSurface( );
187 return screen
!= NULL
&& ( !SDL_MUSTLOCK( screen
) || SDL_LockSurface( screen
) >= 0 );
190 static void sdl_unlock_display( )
192 SDL_Surface
*screen
= SDL_GetVideoSurface( );
193 if ( screen
!= NULL
&& SDL_MUSTLOCK( screen
) )
194 SDL_UnlockSurface( screen
);
197 static void sdl_fill_audio( void *udata
, uint8_t *stream
, int len
)
199 consumer_sdl
this = udata
;
202 float volume
= mlt_properties_get_double( this->properties
, "volume" );
204 pthread_mutex_lock( &this->audio_mutex
);
206 // Block until audio received
207 while ( this->running
&& len
> this->audio_avail
)
208 pthread_cond_wait( &this->audio_cond
, &this->audio_mutex
);
210 if ( this->audio_avail
>= len
)
212 // Place in the audio buffer
213 SDL_MixAudio( stream
, this->audio_buffer
, len
, ( int )( ( float )SDL_MIX_MAXVOLUME
* volume
) );
215 // Remove len from the audio available
216 this->audio_avail
-= len
;
218 // Remove the samples
219 memmove( this->audio_buffer
, this->audio_buffer
+ len
, this->audio_avail
);
223 // Just to be safe, wipe the stream first
224 memset( stream
, 0, len
);
226 // Copy what we have into the stream
227 memcpy( stream
, this->audio_buffer
, this->audio_avail
);
230 SDL_MixAudio( stream
, stream
, len
, ( int )( ( float )SDL_MIX_MAXVOLUME
* volume
) );
233 this->audio_avail
= 0;
236 // We're definitely playing now
239 pthread_cond_broadcast( &this->audio_cond
);
240 pthread_mutex_unlock( &this->audio_mutex
);
243 static int consumer_play_audio( consumer_sdl
this, mlt_frame frame
, int init_audio
, int *duration
)
245 // Get the properties of this consumer
246 mlt_properties properties
= this->properties
;
247 mlt_audio_format afmt
= mlt_audio_pcm
;
249 // Set the preferred params of the test card signal
251 int frequency
= 48000;
252 static int counter
= 0;
253 if ( mlt_properties_get_int( properties
, "frequency" ) != 0 )
254 frequency
= mlt_properties_get_int( properties
, "frequency" );
256 int samples
= mlt_sample_calculator( mlt_properties_get_double( this->properties
, "fps" ), frequency
, counter
++ );
261 mlt_frame_get_audio( frame
, &pcm
, &afmt
, &frequency
, &channels
, &samples
);
262 *duration
= ( ( samples
* 1000 ) / frequency
);
264 if ( mlt_properties_get_int( properties
, "audio_off" ) )
270 if ( init_audio
== 1 )
272 SDL_AudioSpec request
;
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
= 4096;
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
, int64_t elapsed
, int64_t playtime
)
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
);
336 mlt_properties_set_position( mlt_frame_properties( frame
), "playtime", playtime
);
338 // Push this frame to the back of the queue
339 mlt_deque_push_back( this->queue
, frame
);
343 frame
= mlt_deque_pop_front( this->queue
);
345 if ( this->playing
&& frame
!= NULL
&& mlt_properties_get_int( mlt_frame_properties( frame
), "rendered" ) == 1 )
347 playtime
= mlt_properties_get_position( mlt_frame_properties( frame
), "playtime" );
349 // Get the image, width and height
350 mlt_frame_get_image( frame
, &image
, &vfmt
, &width
, &height
, 0 );
352 if ( playtime
> elapsed
+ 25000 )
354 struct timespec tm
= { ( playtime
- elapsed
) / 1000000, ( ( playtime
- elapsed
) % 1000000 ) * 1000 };
355 nanosleep( &tm
, NULL
);
359 if ( this->sdl_screen
!= NULL
)
363 changed
= consumer_get_dimensions( &this->window_width
, &this->window_height
);
365 while ( SDL_PollEvent( &event
) )
369 case SDL_VIDEORESIZE
:
370 this->window_width
= event
.resize
.w
;
371 this->window_height
= event
.resize
.h
;
376 mlt_producer producer
= mlt_properties_get_data( properties
, "transport_producer", NULL
);
377 char keyboard
[ 2 ] = " ";
378 void (*callback
)( mlt_producer
, char * ) = mlt_properties_get_data( properties
, "transport_callback", NULL
);
379 if ( callback
!= NULL
&& producer
!= NULL
&& event
.key
.keysym
.unicode
< 0x80 && event
.key
.keysym
.unicode
> 0 )
381 keyboard
[ 0 ] = ( char )event
.key
.keysym
.unicode
;
382 callback( producer
, keyboard
);
390 if ( width
!= this->width
|| height
!= this->height
)
393 this->height
= height
;
397 if ( this->sdl_screen
== NULL
|| changed
)
399 double aspect_ratio
= ( float )this->aspect_ratio
* this->width
/ this->height
;
400 float display_aspect_ratio
= ( float )width
/ height
;
402 if ( mlt_properties_get( properties
, "rescale" ) != NULL
&&
403 !strcmp( mlt_properties_get( properties
, "rescale" ), "none" ) )
404 aspect_ratio
= mlt_frame_get_aspect_ratio( frame
) * mlt_properties_get_int(mlt_frame_properties(frame
),"width") / mlt_properties_get_int(mlt_frame_properties(frame
),"height");
406 if ( aspect_ratio
== 1 )
408 rect
.w
= this->window_width
;
409 rect
.h
= this->window_height
;
411 else if ( this->window_width
< this->window_height
* aspect_ratio
)
413 rect
.w
= this->window_width
;
414 rect
.h
= this->window_width
/ aspect_ratio
+ 1;
418 rect
.w
= this->window_height
* aspect_ratio
+ 1;
419 rect
.h
= this->window_height
;
422 if ( mlt_properties_get_int( properties
, "scale_overlay" ) )
424 if ( ( float )rect
.w
* display_aspect_ratio
< this->window_width
)
425 rect
.w
= ( int )( ( float )rect
.w
* display_aspect_ratio
);
426 else if ( ( float )rect
.h
* display_aspect_ratio
< this->window_height
)
427 rect
.h
= ( int )( ( float )rect
.h
* display_aspect_ratio
);
430 rect
.x
= ( this->window_width
- rect
.w
) / 2;
431 rect
.y
= ( this->window_height
- rect
.h
) / 2;
433 // Force an overlay recreation
434 if ( this->sdl_overlay
!= NULL
)
435 SDL_FreeYUVOverlay( this->sdl_overlay
);
437 // open SDL window with video overlay, if possible
438 this->sdl_screen
= SDL_SetVideoMode( this->window_width
, this->window_height
, 0, this->sdl_flags
);
440 if ( this->sdl_screen
!= NULL
)
442 SDL_SetClipRect( this->sdl_screen
, &rect
);
445 this->sdl_overlay
= SDL_CreateYUVOverlay( this->width
- (this->width
% 4), this->height
- (this->height
% 2 ), SDL_YUY2_OVERLAY
, this->sdl_screen
);
446 sdl_unlock_display();
450 if ( this->sdl_screen
!= NULL
&& this->sdl_overlay
!= NULL
)
452 this->buffer
= this->sdl_overlay
->pixels
[ 0 ];
453 if ( SDL_LockYUVOverlay( this->sdl_overlay
) >= 0 )
455 memcpy( this->buffer
, image
, width
* height
* 2 );
456 SDL_UnlockYUVOverlay( this->sdl_overlay
);
457 SDL_DisplayYUVOverlay( this->sdl_overlay
, &this->sdl_screen
->clip_rect
);
464 mlt_frame_close( frame
);
469 /** Threaded wrapper for pipe.
472 static void *consumer_thread( void *arg
)
475 consumer_sdl
this = arg
;
478 mlt_consumer consumer
= &this->parent
;
480 // internal intialization
483 // Obtain time of thread start
488 int64_t playtime
= 0;
490 if ( SDL_Init( SDL_INIT_VIDEO
| SDL_INIT_AUDIO
| SDL_INIT_NOPARACHUTE
) < 0 )
492 fprintf( stderr
, "Failed to initialize SDL: %s\n", SDL_GetError() );
496 SDL_EnableKeyRepeat( SDL_DEFAULT_REPEAT_DELAY
, SDL_DEFAULT_REPEAT_INTERVAL
);
497 SDL_EnableUNICODE( 1 );
499 // Loop until told not to
500 while( this->running
)
502 // Get a frame from the attached producer
503 mlt_frame frame
= mlt_consumer_rt_frame( consumer
);
505 // Ensure that we have a frame
509 init_audio
= consumer_play_audio( this, frame
, init_audio
, &duration
);
513 // Get the current time
514 gettimeofday( &now
, NULL
);
516 // Determine elapsed time
518 start
= ( int64_t )now
.tv_sec
* 1000000 + now
.tv_usec
;
520 elapsed
= ( ( int64_t )now
.tv_sec
* 1000000 + now
.tv_usec
) - start
;
524 consumer_play_video( this, frame
, elapsed
, playtime
);
526 playtime
+= ( duration
* 1000 );
531 if ( init_audio
== 0 )
533 if ( this->sdl_overlay
!= NULL
)
534 SDL_FreeYUVOverlay( this->sdl_overlay
);
537 while( mlt_deque_count( this->queue
) )
538 mlt_frame_close( mlt_deque_pop_back( this->queue
) );
540 this->sdl_screen
= NULL
;
541 this->sdl_overlay
= NULL
;
542 this->audio_avail
= 0;
547 static int consumer_get_dimensions( int *width
, int *height
)
551 // SDL windows manager structure
554 // Specify the SDL Version
555 SDL_VERSION( &wm
.version
);
557 // Get the wm structure
558 if ( SDL_GetWMInfo( &wm
) == 1 )
560 // Check that we have the X11 wm
561 if ( wm
.subsystem
== SDL_SYSWM_X11
)
563 // Get the SDL window
564 Window window
= wm
.info
.x11
.window
;
566 // Get the display session
567 Display
*display
= wm
.info
.x11
.display
;
569 // Get the window attributes
570 XWindowAttributes attr
;
571 XGetWindowAttributes( display
, window
, &attr
);
573 // Determine whether window has changed
574 changed
= *width
!= attr
.width
|| *height
!= attr
.height
;
576 // Return width and height
578 *height
= attr
.height
;
585 /** Callback to allow override of the close method.
588 static void consumer_close( mlt_consumer parent
)
590 // Get the actual object
591 consumer_sdl
this = parent
->child
;
594 mlt_consumer_stop( parent
);
597 pthread_mutex_destroy( &this->audio_mutex
);
598 pthread_cond_destroy( &this->audio_cond
);
600 // Now clean up the rest
601 mlt_consumer_close( parent
);
603 // Finally clean up this