1 /*****************************************************************************
2 * video_output.c : video output thread
3 * This module describes the programming interface for video output threads.
4 * It includes functions allowing to open a new thread, send pictures to a
5 * thread, and destroy a previously oppened video output thread.
6 *****************************************************************************
7 * Copyright (C) 2000-2001 VideoLAN
8 * $Id: video_output.c,v 1.204 2002/12/18 08:08:29 gbazin Exp $
10 * Authors: Vincent Seguin <seguin@via.ecp.fr>
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
25 *****************************************************************************/
27 /*****************************************************************************
29 *****************************************************************************/
30 #include <stdlib.h> /* free() */
34 #ifdef HAVE_SYS_TIMES_H
35 # include <sys/times.h>
39 #include "video_output.h"
41 #if defined( SYS_DARWIN )
42 #include "darwin_specific.h"
45 /*****************************************************************************
47 *****************************************************************************/
48 static int InitThread ( vout_thread_t * );
49 static void RunThread ( vout_thread_t * );
50 static void ErrorThread ( vout_thread_t * );
51 static void EndThread ( vout_thread_t * );
52 static void DestroyThread ( vout_thread_t * );
54 static int ReduceHeight ( int );
55 static int BinaryLog ( uint32_t );
56 static void MaskToShift ( int *, int *, uint32_t );
57 static void InitWindowSize ( vout_thread_t *, int *, int * );
59 /*****************************************************************************
60 * vout_Request: find a video output thread, create one, or destroy one.
61 *****************************************************************************
62 * This function looks for a video output thread matching the current
63 * properties. If not found, it spawns a new one.
64 *****************************************************************************/
65 vout_thread_t * __vout_Request ( vlc_object_t *p_this, vout_thread_t *p_vout,
66 unsigned int i_width, unsigned int i_height,
67 vlc_fourcc_t i_chroma, unsigned int i_aspect )
69 if( !i_width || !i_height || !i_chroma )
71 /* Reattach video output to p_vlc before bailing out */
74 vlc_object_detach( p_vout );
75 vlc_object_attach( p_vout, p_this->p_vlc );
81 /* If a video output was provided, lock it, otherwise look for one. */
84 vlc_object_yield( p_vout );
88 p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_CHILD );
92 p_vout = vlc_object_find( p_this, VLC_OBJECT_VOUT, FIND_ANYWHERE );
96 /* If we now have a video output, check it has the right properties */
99 if( ( p_vout->render.i_width != i_width ) ||
100 ( p_vout->render.i_height != i_height ) ||
101 ( p_vout->render.i_chroma != i_chroma ) ||
102 ( p_vout->render.i_aspect != i_aspect ) )
104 /* We are not interested in this format, close this vout */
105 vlc_object_detach( p_vout );
106 vlc_object_release( p_vout );
107 vout_Destroy( p_vout );
112 /* This video output is cool! Hijack it. */
113 vlc_object_detach( p_vout );
114 vlc_object_attach( p_vout, p_this );
115 vlc_object_release( p_vout );
121 msg_Dbg( p_this, "no usable vout present, spawning one" );
123 p_vout = vout_Create( p_this, i_width, i_height, i_chroma, i_aspect );
129 /*****************************************************************************
130 * vout_Create: creates a new video output thread
131 *****************************************************************************
132 * This function creates a new video output thread, and returns a pointer
133 * to its description. On error, it returns NULL.
134 *****************************************************************************/
135 vout_thread_t * __vout_Create( vlc_object_t *p_parent,
136 unsigned int i_width, unsigned int i_height,
137 vlc_fourcc_t i_chroma, unsigned int i_aspect )
139 vout_thread_t * p_vout; /* thread descriptor */
140 int i_index; /* loop variable */
144 /* Allocate descriptor */
145 p_vout = vlc_object_create( p_parent, VLC_OBJECT_VOUT );
148 msg_Err( p_parent, "out of memory" );
152 var_Create( p_vout, "intf-change", VLC_VAR_BOOL );
153 val.b_bool = VLC_TRUE;
154 var_Set( p_vout, "intf-change", val );
156 /* If the parent is not a VOUT object, that means we are at the start of
157 * the video output pipe */
158 if( p_parent->i_object_type != VLC_OBJECT_VOUT )
160 char *psz_aspect = config_GetPsz( p_parent, "aspect-ratio" );
162 /* Check whether the user tried to override aspect ratio */
165 unsigned int i_new_aspect = i_aspect;
166 char *psz_parser = strchr( psz_aspect, ':' );
170 *psz_parser++ = '\0';
171 i_new_aspect = atoi( psz_aspect ) * VOUT_ASPECT_FACTOR
172 / atoi( psz_parser );
176 i_new_aspect = i_width * VOUT_ASPECT_FACTOR
183 if( i_new_aspect && i_new_aspect != i_aspect )
185 int i_pgcd = ReduceHeight( i_new_aspect );
187 msg_Dbg( p_vout, "overriding source aspect ratio to %i:%i",
188 i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
190 i_aspect = i_new_aspect;
194 /* Look for the default filter configuration */
195 p_vout->psz_filter_chain = config_GetPsz( p_parent, "filter" );
199 /* continue the parent's filter chain */
202 psz_end = strchr( ((vout_thread_t *)p_parent)->psz_filter_chain, ':' );
203 if( psz_end && *(psz_end+1) )
204 p_vout->psz_filter_chain = strdup( psz_end+1 );
205 else p_vout->psz_filter_chain = NULL;
208 /* Choose the video output module */
209 if( !p_vout->psz_filter_chain )
211 psz_plugin = config_GetPsz( p_parent, "vout" );
215 /* the filter chain is a string list of filters separated by double
219 psz_end = strchr( p_vout->psz_filter_chain, ':' );
221 psz_plugin = strndup( p_vout->psz_filter_chain,
222 psz_end - p_vout->psz_filter_chain );
223 else psz_plugin = strdup( p_vout->psz_filter_chain );
226 /* Initialize pictures and subpictures - translation tables and functions
227 * will be initialized later in InitThread */
228 for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++)
230 p_vout->p_picture[i_index].i_status = FREE_PICTURE;
231 p_vout->p_picture[i_index].i_type = EMPTY_PICTURE;
234 for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
236 p_vout->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
237 p_vout->p_subpicture[i_index].i_type = EMPTY_SUBPICTURE;
240 /* No images in the heap */
241 p_vout->i_heap_size = 0;
243 /* Initialize the rendering heap */
244 I_RENDERPICTURES = 0;
245 p_vout->render.i_width = i_width;
246 p_vout->render.i_height = i_height;
247 p_vout->render.i_chroma = i_chroma;
248 p_vout->render.i_aspect = i_aspect;
250 p_vout->render.i_rmask = 0;
251 p_vout->render.i_gmask = 0;
252 p_vout->render.i_bmask = 0;
254 p_vout->render.i_last_used_pic = -1;
255 p_vout->render.b_allow_modify_pics = 1;
257 /* Zero the output heap */
258 I_OUTPUTPICTURES = 0;
259 p_vout->output.i_width = 0;
260 p_vout->output.i_height = 0;
261 p_vout->output.i_chroma = 0;
262 p_vout->output.i_aspect = 0;
264 p_vout->output.i_rmask = 0;
265 p_vout->output.i_gmask = 0;
266 p_vout->output.i_bmask = 0;
268 /* Initialize misc stuff */
269 p_vout->i_changes = 0;
271 p_vout->b_grayscale = 0;
273 p_vout->b_interface = 0;
275 p_vout->b_fullscreen = 0;
276 p_vout->render_time = 10;
277 p_vout->c_fps_samples= 0;
279 /* Mouse coordinates */
280 var_Create( p_vout, "mouse-x", VLC_VAR_INTEGER );
281 var_Create( p_vout, "mouse-y", VLC_VAR_INTEGER );
282 var_Create( p_vout, "mouse-moved", VLC_VAR_BOOL );
283 var_Create( p_vout, "mouse-clicked", VLC_VAR_INTEGER );
285 /* user requested fullscreen? */
286 if( config_GetInt( p_vout, "fullscreen" ) )
288 p_vout->i_changes |= VOUT_FULLSCREEN_CHANGE;
291 /* Initialize the dimensions of the video window */
292 InitWindowSize( p_vout, &p_vout->i_window_width,
293 &p_vout->i_window_height );
296 p_vout->p_module = module_Need( p_vout,
297 ( p_vout->psz_filter_chain ) ?
298 "video filter" : "video output",
301 if( psz_plugin ) free( psz_plugin );
302 if( p_vout->p_module == NULL )
304 msg_Err( p_vout, "no suitable vout module" );
305 vlc_object_destroy( p_vout );
309 /* Create thread and set locks */
310 vlc_mutex_init( p_vout, &p_vout->picture_lock );
311 vlc_mutex_init( p_vout, &p_vout->subpicture_lock );
312 vlc_mutex_init( p_vout, &p_vout->change_lock );
314 vlc_object_attach( p_vout, p_parent );
316 if( vlc_thread_create( p_vout, "video output", RunThread,
317 VLC_THREAD_PRIORITY_OUTPUT, VLC_FALSE ) )
319 msg_Err( p_vout, "out of memory" );
320 module_Unneed( p_vout, p_vout->p_module );
321 vlc_object_destroy( p_vout );
328 /*****************************************************************************
329 * vout_Destroy: destroys a previously created video output
330 *****************************************************************************
331 * Destroy a terminated thread.
332 * The function will request a destruction of the specified thread. If pi_error
333 * is NULL, it will return once the thread is destroyed. Else, it will be
334 * update using one of the THREAD_* constants.
335 *****************************************************************************/
336 void vout_Destroy( vout_thread_t *p_vout )
338 /* Request thread destruction */
339 p_vout->b_die = VLC_TRUE;
340 vlc_thread_join( p_vout );
342 var_Destroy( p_vout, "intf-change" );
345 vlc_object_destroy( p_vout );
348 /*****************************************************************************
349 * InitThread: initialize video output thread
350 *****************************************************************************
351 * This function is called from RunThread and performs the second step of the
352 * initialization. It returns 0 on success. Note that the thread's flag are not
353 * modified inside this function.
354 *****************************************************************************/
355 static int InitThread( vout_thread_t *p_vout )
359 vlc_mutex_lock( &p_vout->change_lock );
365 /* Initialize output method, it allocates direct buffers for us */
366 if( p_vout->pf_init( p_vout ) )
368 vlc_mutex_unlock( &p_vout->change_lock );
372 if( !I_OUTPUTPICTURES )
374 msg_Err( p_vout, "plugin was unable to allocate at least "
375 "one direct buffer" );
376 p_vout->pf_end( p_vout );
377 vlc_mutex_unlock( &p_vout->change_lock );
381 if( I_OUTPUTPICTURES > VOUT_MAX_PICTURES )
383 msg_Err( p_vout, "plugin allocated too many direct buffers, "
384 "our internal buffers must have overflown." );
385 p_vout->pf_end( p_vout );
386 vlc_mutex_unlock( &p_vout->change_lock );
390 msg_Dbg( p_vout, "got %i direct buffer(s)", I_OUTPUTPICTURES );
393 if( !p_vout->psz_filter_chain )
395 char *psz_aspect = config_GetPsz( p_vout, "pixel-ratio" );
399 int i_new_aspect = p_vout->output.i_width * VOUT_ASPECT_FACTOR
401 / p_vout->output.i_height;
404 if( i_new_aspect && i_new_aspect != p_vout->output.i_aspect )
406 int i_pgcd = ReduceHeight( i_new_aspect );
407 msg_Dbg( p_vout, "output ratio forced to %i:%i\n",
408 i_new_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
409 p_vout->output.i_aspect = i_new_aspect;
415 i_pgcd = ReduceHeight( p_vout->render.i_aspect );
417 "picture in %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
418 p_vout->render.i_width, p_vout->render.i_height,
419 p_vout->render.i_chroma, (char*)&p_vout->render.i_chroma,
420 p_vout->render.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
422 i_pgcd = ReduceHeight( p_vout->output.i_aspect );
424 "picture out %ix%i, chroma 0x%.8x (%4.4s), aspect ratio %i:%i",
425 p_vout->output.i_width, p_vout->output.i_height,
426 p_vout->output.i_chroma, (char*)&p_vout->output.i_chroma,
427 p_vout->output.i_aspect / i_pgcd, VOUT_ASPECT_FACTOR / i_pgcd );
429 /* Calculate shifts from system-updated masks */
430 MaskToShift( &p_vout->output.i_lrshift, &p_vout->output.i_rrshift,
431 p_vout->output.i_rmask );
432 MaskToShift( &p_vout->output.i_lgshift, &p_vout->output.i_rgshift,
433 p_vout->output.i_gmask );
434 MaskToShift( &p_vout->output.i_lbshift, &p_vout->output.i_rbshift,
435 p_vout->output.i_bmask );
437 /* Check whether we managed to create direct buffers similar to
438 * the render buffers, ie same size and chroma */
439 if( ( p_vout->output.i_width == p_vout->render.i_width )
440 && ( p_vout->output.i_height == p_vout->render.i_height )
441 && ( vout_ChromaCmp( p_vout->output.i_chroma, p_vout->render.i_chroma ) ) )
443 /* Cool ! We have direct buffers, we can ask the decoder to
444 * directly decode into them ! Map the first render buffers to
445 * the first direct buffers, but keep the first direct buffer
446 * for memcpy operations */
447 p_vout->b_direct = 1;
449 for( i = 1; i < VOUT_MAX_PICTURES; i++ )
451 if( p_vout->p_picture[ i ].i_type != DIRECT_PICTURE &&
452 I_RENDERPICTURES >= VOUT_MIN_DIRECT_PICTURES - 1 &&
453 p_vout->p_picture[ i - 1 ].i_type == DIRECT_PICTURE )
455 /* We have enough direct buffers so there's no need to
456 * try to use system memory buffers. */
459 PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
463 msg_Dbg( p_vout, "direct render, mapping "
464 "render pictures 0-%i to system pictures 1-%i",
465 VOUT_MAX_PICTURES - 2, VOUT_MAX_PICTURES - 1 );
469 /* Rats... Something is wrong here, we could not find an output
470 * plugin able to directly render what we decode. See if we can
471 * find a chroma plugin to do the conversion */
472 p_vout->b_direct = 0;
474 /* Choose the best module */
475 p_vout->chroma.p_module = module_Need( p_vout, "chroma", NULL );
477 if( p_vout->chroma.p_module == NULL )
479 msg_Err( p_vout, "no chroma module for %4.4s to %4.4s",
480 &p_vout->render.i_chroma, &p_vout->output.i_chroma );
481 p_vout->pf_end( p_vout );
482 vlc_mutex_unlock( &p_vout->change_lock );
486 msg_Dbg( p_vout, "indirect render, mapping "
487 "render pictures 0-%i to system pictures %i-%i",
488 VOUT_MAX_PICTURES - 1, I_OUTPUTPICTURES,
489 I_OUTPUTPICTURES + VOUT_MAX_PICTURES - 1 );
491 /* Append render buffers after the direct buffers */
492 for( i = I_OUTPUTPICTURES; i < 2 * VOUT_MAX_PICTURES; i++ )
494 PP_RENDERPICTURE[ I_RENDERPICTURES ] = &p_vout->p_picture[ i ];
497 /* Check if we have enough render pictures */
498 if( I_RENDERPICTURES == VOUT_MAX_PICTURES )
503 /* Link pictures back to their heap */
504 for( i = 0 ; i < I_RENDERPICTURES ; i++ )
506 PP_RENDERPICTURE[ i ]->p_heap = &p_vout->render;
509 for( i = 0 ; i < I_OUTPUTPICTURES ; i++ )
511 PP_OUTPUTPICTURE[ i ]->p_heap = &p_vout->output;
514 /* XXX XXX mark thread ready */
518 /*****************************************************************************
519 * RunThread: video output thread
520 *****************************************************************************
521 * Video output thread. This function does only returns when the thread is
522 * terminated. It handles the pictures arriving in the video heap and the
523 * display device events.
524 *****************************************************************************/
525 static void RunThread( vout_thread_t *p_vout)
527 int i_index; /* index in heap */
528 int i_idle_loops = 0; /* loops without displaying a picture */
529 mtime_t current_date; /* current date */
530 mtime_t display_date; /* display date */
532 picture_t * p_picture; /* picture pointer */
533 picture_t * p_last_picture = NULL; /* last picture */
534 picture_t * p_directbuffer; /* direct buffer to display */
536 subpicture_t * p_subpic; /* subpicture pointer */
541 p_vout->b_error = InitThread( p_vout );
542 if( p_vout->b_error )
544 /* Destroy thread structures allocated by Create and InitThread */
545 DestroyThread( p_vout );
550 * Main loop - it is not executed if an error occured during
553 while( (!p_vout->b_die) && (!p_vout->b_error) )
555 /* Initialize loop variables */
558 current_date = mdate();
562 if( !(p_vout->c_loops % VOUT_STATS_NB_LOOPS) )
564 msg_Dbg( p_vout, "picture heap: %d/%d",
565 I_RENDERPICTURES, p_vout->i_heap_size );
570 * Find the picture to display (the one with the earliest date).
571 * This operation does not need lock, since only READY_PICTUREs
573 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
575 if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
576 && ( (p_picture == NULL) ||
577 (PP_RENDERPICTURE[i_index]->date < display_date) ) )
579 p_picture = PP_RENDERPICTURE[i_index];
580 display_date = p_picture->date;
586 /* If we met the last picture, parse again to see whether there is
587 * a more appropriate one. */
588 if( p_picture == p_last_picture )
590 for( i_index = 0; i_index < I_RENDERPICTURES; i_index++ )
592 if( (PP_RENDERPICTURE[i_index]->i_status == READY_PICTURE)
593 && (PP_RENDERPICTURE[i_index] != p_last_picture)
594 && ((p_picture == p_last_picture) ||
595 (PP_RENDERPICTURE[i_index]->date < display_date)) )
597 p_picture = PP_RENDERPICTURE[i_index];
598 display_date = p_picture->date;
603 /* If we found better than the last picture, destroy it */
604 if( p_last_picture && p_picture != p_last_picture )
606 vlc_mutex_lock( &p_vout->picture_lock );
607 if( p_last_picture->i_refcount )
609 p_last_picture->i_status = DISPLAYED_PICTURE;
613 p_last_picture->i_status = DESTROYED_PICTURE;
614 p_vout->i_heap_size--;
616 vlc_mutex_unlock( &p_vout->picture_lock );
617 p_last_picture = NULL;
620 /* Compute FPS rate */
621 p_vout->p_fps_sample[ p_vout->c_fps_samples++ % VOUT_FPS_SAMPLES ]
624 if( !p_picture->b_force &&
625 p_picture != p_last_picture &&
626 display_date < current_date + p_vout->render_time )
628 /* Picture is late: it will be destroyed and the thread
629 * will directly choose the next picture */
630 vlc_mutex_lock( &p_vout->picture_lock );
631 if( p_picture->i_refcount )
633 /* Pretend we displayed the picture, but don't destroy
634 * it since the decoder might still need it. */
635 p_picture->i_status = DISPLAYED_PICTURE;
639 /* Destroy the picture without displaying it */
640 p_picture->i_status = DESTROYED_PICTURE;
641 p_vout->i_heap_size--;
643 msg_Warn( p_vout, "late picture skipped ("I64Fd")",
644 current_date - display_date );
645 vlc_mutex_unlock( &p_vout->picture_lock );
650 /* Removed because it causes problems for some people --Meuuh */
651 if( display_date > current_date + VOUT_BOGUS_DELAY )
653 /* Picture is waaay too early: it will be destroyed */
654 vlc_mutex_lock( &p_vout->picture_lock );
655 if( p_picture->i_refcount )
657 /* Pretend we displayed the picture, but don't destroy
658 * it since the decoder might still need it. */
659 p_picture->i_status = DISPLAYED_PICTURE;
663 /* Destroy the picture without displaying it */
664 p_picture->i_status = DESTROYED_PICTURE;
665 p_vout->i_heap_size--;
667 intf_WarnMsg( 1, "vout warning: early picture skipped "
668 "("I64Fd")", display_date - current_date );
669 vlc_mutex_unlock( &p_vout->picture_lock );
674 if( display_date > current_date + VOUT_DISPLAY_DELAY )
676 /* A picture is ready to be rendered, but its rendering date
677 * is far from the current one so the thread will perform an
678 * empty loop as if no picture were found. The picture state
683 else if( p_picture == p_last_picture )
685 /* We are asked to repeat the previous picture, but we first
686 * wait for a couple of idle loops */
687 if( i_idle_loops < 4 )
694 /* We set the display date to something high, otherwise
695 * we'll have lots of problems with late pictures */
696 display_date = current_date + p_vout->render_time;
701 if( p_picture == NULL )
707 * Check for subpictures to display
709 p_subpic = vout_SortSubPictures( p_vout, display_date );
714 p_directbuffer = vout_RenderPicture( p_vout, p_picture, p_subpic );
717 * Call the plugin-specific rendering method if there is one
719 if( p_picture != NULL && p_vout->pf_render )
721 /* Render the direct buffer returned by vout_RenderPicture */
722 p_vout->pf_render( p_vout, p_directbuffer );
728 if( display_date != 0 )
730 /* Store render time using a sliding mean */
731 p_vout->render_time += mdate() - current_date;
732 p_vout->render_time >>= 1;
735 /* Give back change lock */
736 vlc_mutex_unlock( &p_vout->change_lock );
738 /* Sleep a while or until a given date */
739 if( display_date != 0 )
741 mwait( display_date - VOUT_MWAIT_TOLERANCE );
745 msleep( VOUT_IDLE_SLEEP );
748 /* On awakening, take back lock and send immediately picture
750 vlc_mutex_lock( &p_vout->change_lock );
753 * Display the previously rendered picture
755 if( p_picture != NULL )
757 /* Display the direct buffer returned by vout_RenderPicture */
758 if( p_vout->pf_display )
760 p_vout->pf_display( p_vout, p_directbuffer );
763 /* Reinitialize idle loop count */
766 /* Tell the vout this was the last picture and that it does not
767 * need to be forced anymore. */
768 p_last_picture = p_picture;
769 p_last_picture->b_force = 0;
773 * Check events and manage thread
775 if( p_vout->pf_manage && p_vout->pf_manage( p_vout ) )
777 /* A fatal error occured, and the thread must terminate
778 * immediately, without displaying anything - setting b_error to 1
779 * causes the immediate end of the main while() loop. */
783 if( p_vout->i_changes & VOUT_SIZE_CHANGE )
785 /* this must only happen when the vout plugin is incapable of
786 * rescaling the picture itself. In this case we need to destroy
787 * the current picture buffers and recreate new ones with the right
791 p_vout->i_changes &= ~VOUT_SIZE_CHANGE;
793 p_vout->pf_end( p_vout );
794 for( i = 0; i < I_OUTPUTPICTURES; i++ )
795 p_vout->p_picture[ i ].i_status = FREE_PICTURE;
797 I_OUTPUTPICTURES = 0;
798 if( p_vout->pf_init( p_vout ) )
800 msg_Err( p_vout, "cannot resize display" );
801 /* FIXME: pf_end will be called again in EndThread() */
805 /* Need to reinitialise the chroma plugin */
806 p_vout->chroma.p_module->pf_deactivate( VLC_OBJECT(p_vout) );
807 p_vout->chroma.p_module->pf_activate( VLC_OBJECT(p_vout) );
812 * Error loop - wait until the thread destruction is requested
814 if( p_vout->b_error )
816 ErrorThread( p_vout );
822 /* Destroy thread structures allocated by CreateThread */
823 DestroyThread( p_vout );
826 /*****************************************************************************
827 * ErrorThread: RunThread() error loop
828 *****************************************************************************
829 * This function is called when an error occured during thread main's loop. The
830 * thread can still receive feed, but must be ready to terminate as soon as
832 *****************************************************************************/
833 static void ErrorThread( vout_thread_t *p_vout )
835 /* Wait until a `die' order */
836 while( !p_vout->b_die )
839 msleep( VOUT_IDLE_SLEEP );
843 /*****************************************************************************
844 * EndThread: thread destruction
845 *****************************************************************************
846 * This function is called when the thread ends after a sucessful
847 * initialization. It frees all ressources allocated by InitThread.
848 *****************************************************************************/
849 static void EndThread( vout_thread_t *p_vout )
851 int i_index; /* index in heap */
855 struct tms cpu_usage;
858 msg_Dbg( p_vout, "cpu usage (user: %d, system: %d)",
859 cpu_usage.tms_utime, cpu_usage.tms_stime );
863 if( !p_vout->b_direct )
865 module_Unneed( p_vout, p_vout->chroma.p_module );
868 /* Destroy all remaining pictures */
869 for( i_index = 0; i_index < 2 * VOUT_MAX_PICTURES; i_index++ )
871 if ( p_vout->p_picture[i_index].i_type == MEMORY_PICTURE )
873 free( p_vout->p_picture[i_index].p_data_orig );
877 /* Destroy all remaining subpictures */
878 for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
880 if( p_vout->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
882 free( p_vout->p_subpicture[i_index].p_sys );
886 /* Destroy translation tables */
887 p_vout->pf_end( p_vout );
889 /* Release the change lock */
890 vlc_mutex_unlock( &p_vout->change_lock );
893 /*****************************************************************************
894 * DestroyThread: thread destruction
895 *****************************************************************************
896 * This function is called when the thread ends. It frees all ressources
897 * allocated by CreateThread. Status is available at this stage.
898 *****************************************************************************/
899 static void DestroyThread( vout_thread_t *p_vout )
901 /* Destroy the locks */
902 vlc_mutex_destroy( &p_vout->picture_lock );
903 vlc_mutex_destroy( &p_vout->subpicture_lock );
904 vlc_mutex_destroy( &p_vout->change_lock );
906 /* Release the module */
907 module_Unneed( p_vout, p_vout->p_module );
910 /* following functions are local */
912 static int ReduceHeight( int i_ratio )
914 int i_dummy = VOUT_ASPECT_FACTOR;
922 /* VOUT_ASPECT_FACTOR is (2^7 * 3^3 * 5^3), we just check for 2, 3 and 5 */
923 while( !(i_ratio & 1) && !(i_dummy & 1) )
930 while( !(i_ratio % 3) && !(i_dummy % 3) )
937 while( !(i_ratio % 5) && !(i_dummy % 5) )
947 /*****************************************************************************
948 * BinaryLog: computes the base 2 log of a binary value
949 *****************************************************************************
950 * This functions is used by MaskToShift, to get a bit index from a binary
952 *****************************************************************************/
953 static int BinaryLog( uint32_t i )
957 if( i == 0 ) return -31337;
959 if( i & 0xffff0000 ) i_log += 16;
960 if( i & 0xff00ff00 ) i_log += 8;
961 if( i & 0xf0f0f0f0 ) i_log += 4;
962 if( i & 0xcccccccc ) i_log += 2;
963 if( i & 0xaaaaaaaa ) i_log += 1;
968 /*****************************************************************************
969 * MaskToShift: transform a color mask into right and left shifts
970 *****************************************************************************
971 * This function is used for obtaining color shifts from masks.
972 *****************************************************************************/
973 static void MaskToShift( int *pi_left, int *pi_right, uint32_t i_mask )
975 uint32_t i_low, i_high; /* lower hand higher bits of the mask */
979 *pi_left = *pi_right = 0;
984 i_low = i_mask & (- (int32_t)i_mask); /* lower bit of the mask */
985 i_high = i_mask + i_low; /* higher bit of the mask */
987 /* Transform bits into an index */
988 i_low = BinaryLog (i_low);
989 i_high = BinaryLog (i_high);
991 /* Update pointers and return */
993 *pi_right = (8 - i_high + i_low);
996 /*****************************************************************************
997 * InitWindowSize: find the initial dimensions the video window should have.
998 *****************************************************************************
999 * This function will check the "width", "height" and "zoom" config options and
1000 * will calculate the size that the video window should have.
1001 *****************************************************************************/
1002 static void InitWindowSize( vout_thread_t *p_vout, int *pi_width,
1005 int i_width, i_height;
1008 #define FP_FACTOR 1000 /* our fixed point factor */
1010 i_width = config_GetInt( p_vout, "width" );
1011 i_height = config_GetInt( p_vout, "height" );
1012 ll_zoom = (uint64_t)( FP_FACTOR * config_GetFloat( p_vout, "zoom" ) );
1014 if( (i_width >= 0) && (i_height >= 0))
1016 *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1017 *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1020 else if( i_width >= 0 )
1022 *pi_width = (int)( i_width * ll_zoom / FP_FACTOR );
1023 *pi_height = (int)( i_width * ll_zoom * VOUT_ASPECT_FACTOR /
1024 p_vout->render.i_aspect / FP_FACTOR );
1027 else if( i_height >= 0 )
1029 *pi_height = (int)( i_height * ll_zoom / FP_FACTOR );
1030 *pi_width = (int)( i_height * ll_zoom * p_vout->render.i_aspect /
1031 VOUT_ASPECT_FACTOR / FP_FACTOR );
1035 if( p_vout->render.i_height * p_vout->render.i_aspect
1036 >= p_vout->render.i_width * VOUT_ASPECT_FACTOR )
1038 *pi_width = (int)( p_vout->render.i_height * ll_zoom
1039 * p_vout->render.i_aspect / VOUT_ASPECT_FACTOR / FP_FACTOR );
1040 *pi_height = (int)( p_vout->render.i_height * ll_zoom / FP_FACTOR );
1044 *pi_width = (int)( p_vout->render.i_width * ll_zoom / FP_FACTOR );
1045 *pi_height = (int)( p_vout->render.i_width * ll_zoom
1046 * VOUT_ASPECT_FACTOR / p_vout->render.i_aspect / FP_FACTOR );
1052 /*****************************************************************************
1053 * vout_VarCallback: generic callback for intf variables
1054 *****************************************************************************/
1055 int vout_VarCallback( vlc_object_t * p_this, const char * psz_variable,
1056 vlc_value_t old_value, vlc_value_t new_value,
1059 vout_thread_t * p_vout = (vout_thread_t *)p_this;
1062 var_Set( p_vout, "intf-change", val );