1 /*****************************************************************************
2 * vout_subpictures.c : subpicture management functions
3 *****************************************************************************
4 * Copyright (C) 2000-2007 the VideoLAN team
7 * Authors: Vincent Seguin <seguin@via.ecp.fr>
8 * Samuel Hocevar <sam@zoy.org>
9 * Gildas Bazin <gbazin@videolan.org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24 *****************************************************************************/
26 /*****************************************************************************
28 *****************************************************************************/
33 #include <vlc_common.h>
35 #include <vlc_block.h>
36 #include <vlc_filter.h>
38 #include "../libvlc.h"
42 /*****************************************************************************
44 *****************************************************************************/
45 static void UpdateSPU ( spu_t *, vlc_object_t * );
46 static int CropCallback( vlc_object_t *, char const *,
47 vlc_value_t, vlc_value_t, void * );
49 static int spu_vaControlDefault( spu_t *, int, va_list );
51 static subpicture_t *sub_new_buffer( filter_t * );
52 static void sub_del_buffer( filter_t *, subpicture_t * );
53 static subpicture_t *spu_new_buffer( filter_t * );
54 static void spu_del_buffer( filter_t *, subpicture_t * );
55 static picture_t *spu_new_video_buffer( filter_t * );
56 static void spu_del_video_buffer( filter_t *, picture_t * );
58 static int spu_ParseChain( spu_t * );
59 static int SubFilterCallback( vlc_object_t *, char const *,
60 vlc_value_t, vlc_value_t, void * );
62 static int sub_filter_allocation_init( filter_t *, void * );
63 static void sub_filter_allocation_clear( filter_t * );
64 struct filter_owner_sys_t
77 * Creates the subpicture unit
79 * \param p_this the parent object which creates the subpicture unit
81 spu_t *__spu_Create( vlc_object_t *p_this )
84 spu_t *p_spu = vlc_custom_create( p_this, sizeof( spu_t ),
85 VLC_OBJECT_GENERIC, "subpicture" );
87 for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++)
89 p_spu->p_subpicture[i_index].i_status = FREE_SUBPICTURE;
92 p_spu->p_blend = NULL;
94 p_spu->p_scale = NULL;
95 p_spu->pf_control = spu_vaControlDefault;
97 /* Register the default subpicture channel */
100 vlc_mutex_init( &p_spu->subpicture_lock );
102 vlc_object_attach( p_spu, p_this );
104 p_spu->p_chain = filter_chain_New( p_spu, "sub filter", false,
105 sub_filter_allocation_init,
106 sub_filter_allocation_clear,
112 * Initialise the subpicture unit
114 * \param p_spu the subpicture unit object
116 int spu_Init( spu_t *p_spu )
120 /* If the user requested a sub margin, we force the position. */
121 var_Create( p_spu, "sub-margin", VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
122 var_Get( p_spu, "sub-margin", &val );
123 p_spu->i_margin = val.i_int;
125 var_Create( p_spu, "sub-filter", VLC_VAR_STRING | VLC_VAR_DOINHERIT );
126 var_AddCallback( p_spu, "sub-filter", SubFilterCallback, p_spu );
128 spu_ParseChain( p_spu );
133 int spu_ParseChain( spu_t *p_spu )
135 char *psz_parser = var_GetString( p_spu, "sub-filter" );
136 if( filter_chain_AppendFromString( p_spu->p_chain, psz_parser ) < 0 )
147 * Destroy the subpicture unit
149 * \param p_this the parent object which destroys the subpicture unit
151 void spu_Destroy( spu_t *p_spu )
155 /* Destroy all remaining subpictures */
156 for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
158 if( p_spu->p_subpicture[i_index].i_status != FREE_SUBPICTURE )
160 spu_DestroySubpicture( p_spu, &p_spu->p_subpicture[i_index] );
166 if( p_spu->p_blend->p_module )
167 module_Unneed( p_spu->p_blend, p_spu->p_blend->p_module );
169 vlc_object_detach( p_spu->p_blend );
170 vlc_object_release( p_spu->p_blend );
175 if( p_spu->p_text->p_module )
176 module_Unneed( p_spu->p_text, p_spu->p_text->p_module );
178 vlc_object_detach( p_spu->p_text );
179 vlc_object_release( p_spu->p_text );
184 if( p_spu->p_scale->p_module )
185 module_Unneed( p_spu->p_scale, p_spu->p_scale->p_module );
187 vlc_object_detach( p_spu->p_scale );
188 vlc_object_release( p_spu->p_scale );
191 filter_chain_Delete( p_spu->p_chain );
193 vlc_mutex_destroy( &p_spu->subpicture_lock );
194 vlc_object_release( p_spu );
198 * Attach/Detach the SPU from any input
200 * \param p_this the object in which to destroy the subpicture unit
201 * \param b_attach to select attach or detach
203 void spu_Attach( spu_t *p_spu, vlc_object_t *p_this, bool b_attach )
205 vlc_object_t *p_input;
207 p_input = vlc_object_find( p_this, VLC_OBJECT_INPUT, FIND_PARENT );
208 if( !p_input ) return;
212 UpdateSPU( p_spu, VLC_OBJECT(p_input) );
213 var_AddCallback( p_input, "highlight", CropCallback, p_spu );
214 vlc_object_release( p_input );
218 /* Delete callback */
219 var_DelCallback( p_input, "highlight", CropCallback, p_spu );
220 vlc_object_release( p_input );
225 * Create a subpicture region
227 * \param p_this vlc_object_t
228 * \param p_fmt the format that this subpicture region should have
230 static void RegionPictureRelease( picture_t *p_pic )
232 free( p_pic->p_data_orig );
234 subpicture_region_t *__spu_CreateRegion( vlc_object_t *p_this,
235 video_format_t *p_fmt )
237 subpicture_region_t *p_region = malloc( sizeof(subpicture_region_t) );
238 if( !p_region ) return NULL;
240 memset( p_region, 0, sizeof(subpicture_region_t) );
241 p_region->i_alpha = 0xff;
242 p_region->p_next = NULL;
243 p_region->p_cache = NULL;
244 p_region->fmt = *p_fmt;
245 p_region->psz_text = NULL;
246 p_region->p_style = NULL;
248 if( p_fmt->i_chroma == VLC_FOURCC('Y','U','V','P') )
249 p_fmt->p_palette = p_region->fmt.p_palette =
250 malloc( sizeof(video_palette_t) );
251 else p_fmt->p_palette = p_region->fmt.p_palette = NULL;
253 p_region->picture.p_data_orig = NULL;
255 if( p_fmt->i_chroma == VLC_FOURCC('T','E','X','T') ) return p_region;
257 vout_AllocatePicture( p_this, &p_region->picture, p_fmt->i_chroma,
258 p_fmt->i_width, p_fmt->i_height, p_fmt->i_aspect );
260 if( !p_region->picture.i_planes )
263 free( p_fmt->p_palette );
267 p_region->picture.pf_release = RegionPictureRelease;
273 * Make a subpicture region from an existing picture_t
275 * \param p_this vlc_object_t
276 * \param p_fmt the format that this subpicture region should have
277 * \param p_pic a pointer to the picture creating the region (not freed)
279 subpicture_region_t *__spu_MakeRegion( vlc_object_t *p_this,
280 video_format_t *p_fmt,
283 subpicture_region_t *p_region = malloc( sizeof(subpicture_region_t) );
285 if( !p_region ) return NULL;
286 memset( p_region, 0, sizeof(subpicture_region_t) );
287 p_region->i_alpha = 0xff;
288 p_region->p_next = 0;
289 p_region->p_cache = 0;
290 p_region->fmt = *p_fmt;
291 p_region->psz_text = 0;
292 p_region->p_style = NULL;
294 if( p_fmt->i_chroma == VLC_FOURCC('Y','U','V','P') )
295 p_fmt->p_palette = p_region->fmt.p_palette =
296 malloc( sizeof(video_palette_t) );
297 else p_fmt->p_palette = p_region->fmt.p_palette = NULL;
299 memcpy( &p_region->picture, p_pic, sizeof(picture_t) );
300 p_region->picture.pf_release = RegionPictureRelease;
306 * Destroy a subpicture region
308 * \param p_this vlc_object_t
309 * \param p_region the subpicture region to destroy
311 void __spu_DestroyRegion( vlc_object_t *p_this, subpicture_region_t *p_region )
313 if( !p_region ) return;
314 if( p_region->picture.pf_release )
315 p_region->picture.pf_release( &p_region->picture );
316 free( p_region->fmt.p_palette );
317 if( p_region->p_cache ) __spu_DestroyRegion( p_this, p_region->p_cache );
319 free( p_region->psz_text );
320 free( p_region->psz_html );
321 //free( p_region->p_style ); FIXME --fenrir plugin does not allocate the memory for it. I think it might lead to segfault, video renderer can live longer than the decoder
326 * Display a subpicture
328 * Remove the reservation flag of a subpicture, which will cause it to be
330 * \param p_spu the subpicture unit object
331 * \param p_subpic the subpicture to display
333 void spu_DisplaySubpicture( spu_t *p_spu, subpicture_t *p_subpic )
335 /* Check if status is valid */
336 if( p_subpic->i_status != RESERVED_SUBPICTURE )
338 msg_Err( p_spu, "subpicture %p has invalid status #%d",
339 p_subpic, p_subpic->i_status );
342 /* Remove reservation flag */
343 p_subpic->i_status = READY_SUBPICTURE;
345 if( p_subpic->i_channel == DEFAULT_CHAN )
347 p_subpic->i_channel = 0xFFFF;
348 spu_Control( p_spu, SPU_CHANNEL_CLEAR, DEFAULT_CHAN );
349 p_subpic->i_channel = DEFAULT_CHAN;
354 * Allocate a subpicture in the spu heap.
356 * This function create a reserved subpicture in the spu heap.
357 * A null pointer is returned if the function fails. This method provides an
358 * already allocated zone of memory in the spu data fields. It needs locking
359 * since several pictures can be created by several producers threads.
360 * \param p_spu the subpicture unit in which to create the subpicture
361 * \return NULL on error, a reserved subpicture otherwise
363 subpicture_t *spu_CreateSubpicture( spu_t *p_spu )
365 int i_subpic; /* subpicture index */
366 subpicture_t * p_subpic = NULL; /* first free subpicture */
369 vlc_mutex_lock( &p_spu->subpicture_lock );
372 * Look for an empty place
375 for( i_subpic = 0; i_subpic < VOUT_MAX_SUBPICTURES; i_subpic++ )
377 if( p_spu->p_subpicture[i_subpic].i_status == FREE_SUBPICTURE )
379 /* Subpicture is empty and ready for allocation */
380 p_subpic = &p_spu->p_subpicture[i_subpic];
381 p_spu->p_subpicture[i_subpic].i_status = RESERVED_SUBPICTURE;
386 /* If no free subpicture could be found */
387 if( p_subpic == NULL )
389 msg_Err( p_spu, "subpicture heap is full" );
390 vlc_mutex_unlock( &p_spu->subpicture_lock );
394 /* Copy subpicture information, set some default values */
395 memset( p_subpic, 0, sizeof(subpicture_t) );
396 p_subpic->i_status = RESERVED_SUBPICTURE;
397 p_subpic->b_absolute = true;
398 p_subpic->b_pausable = false;
399 p_subpic->b_fade = false;
400 p_subpic->i_alpha = 0xFF;
401 p_subpic->p_region = NULL;
402 p_subpic->pf_render = NULL;
403 p_subpic->pf_destroy = NULL;
404 p_subpic->p_sys = NULL;
405 vlc_mutex_unlock( &p_spu->subpicture_lock );
407 p_subpic->pf_create_region = __spu_CreateRegion;
408 p_subpic->pf_make_region = __spu_MakeRegion;
409 p_subpic->pf_destroy_region = __spu_DestroyRegion;
415 * Remove a subpicture from the heap
417 * This function frees a previously reserved subpicture.
418 * It is meant to be used when the construction of a picture aborted.
419 * This function does not need locking since reserved subpictures are ignored
422 void spu_DestroySubpicture( spu_t *p_spu, subpicture_t *p_subpic )
425 vlc_mutex_lock( &p_spu->subpicture_lock );
427 /* There can be race conditions so we need to check the status */
428 if( p_subpic->i_status == FREE_SUBPICTURE )
430 vlc_mutex_unlock( &p_spu->subpicture_lock );
434 /* Check if status is valid */
435 if( ( p_subpic->i_status != RESERVED_SUBPICTURE )
436 && ( p_subpic->i_status != READY_SUBPICTURE ) )
438 msg_Err( p_spu, "subpicture %p has invalid status %d",
439 p_subpic, p_subpic->i_status );
442 while( p_subpic->p_region )
444 subpicture_region_t *p_region = p_subpic->p_region;
445 p_subpic->p_region = p_region->p_next;
446 spu_DestroyRegion( p_spu, p_region );
449 if( p_subpic->pf_destroy )
451 p_subpic->pf_destroy( p_subpic );
454 p_subpic->i_status = FREE_SUBPICTURE;
456 vlc_mutex_unlock( &p_spu->subpicture_lock );
459 /*****************************************************************************
460 * spu_RenderSubpictures: render a subpicture list
461 *****************************************************************************
462 * This function renders all sub picture units in the list.
463 *****************************************************************************/
464 static void SpuRenderCreateBlend( spu_t *p_spu, vlc_fourcc_t i_chroma, int i_aspect )
468 assert( !p_spu->p_blend );
471 p_blend = vlc_custom_create( p_spu, sizeof(filter_t),
472 VLC_OBJECT_GENERIC, "blend" );
476 es_format_Init( &p_blend->fmt_in, VIDEO_ES, 0 );
478 es_format_Init( &p_blend->fmt_out, VIDEO_ES, 0 );
479 p_blend->fmt_out.video.i_x_offset = 0;
480 p_blend->fmt_out.video.i_y_offset = 0;
481 p_blend->fmt_out.video.i_chroma = i_chroma;
482 p_blend->fmt_out.video.i_aspect = i_aspect;
484 /* The blend module will be loaded when needed with the real
486 p_blend->p_module = NULL;
489 vlc_object_attach( p_blend, p_spu );
491 static void SpuRenderUpdateBlend( spu_t *p_spu, const video_format_t *p_vfmt )
493 filter_t *p_blend = p_spu->p_blend;
498 if( p_blend->p_module && p_blend->fmt_in.video.i_chroma != p_vfmt->i_chroma )
500 /* The chroma is not the same, we need to reload the blend module
501 * XXX to match the old behaviour just test !p_blend->fmt_in.video.i_chroma */
502 module_Unneed( p_blend, p_blend->p_module );
503 p_blend->p_module = NULL;
507 p_blend->fmt_in.video = *p_vfmt;
510 if( !p_blend->p_module )
511 p_blend->p_module = module_Need( p_blend, "video blending", 0, 0 );
513 static void SpuRenderCreateAndLoadText( spu_t *p_spu, int i_width, int i_height )
517 assert( !p_spu->p_text );
520 p_text = vlc_custom_create( p_spu, sizeof(filter_t),
521 VLC_OBJECT_GENERIC, "spu text" );
525 es_format_Init( &p_text->fmt_in, VIDEO_ES, 0 );
527 es_format_Init( &p_text->fmt_out, VIDEO_ES, 0 );
528 p_text->fmt_out.video.i_width =
529 p_text->fmt_out.video.i_visible_width = i_width;
530 p_text->fmt_out.video.i_height =
531 p_text->fmt_out.video.i_visible_height = i_height;
533 p_text->pf_sub_buffer_new = spu_new_buffer;
534 p_text->pf_sub_buffer_del = spu_del_buffer;
536 vlc_object_attach( p_text, p_spu );
538 /* FIXME TOCHECK shouldn't module_Need( , , psz_modulename, false ) do the
539 * same than these 2 calls ? */
540 char *psz_modulename = var_CreateGetString( p_spu, "text-renderer" );
541 if( psz_modulename && *psz_modulename )
543 p_text->p_module = module_Need( p_text, "text renderer",
544 psz_modulename, true );
546 free( psz_modulename );
548 if( !p_text->p_module )
549 p_text->p_module = module_Need( p_text, "text renderer", NULL, false );
552 static void SpuRenderCreateAndLoadScale( spu_t *p_spu )
554 /* FIXME: We'll also be using it for YUVA and RGBA blending ... */
555 const vlc_fourcc_t i_dummy_chroma = VLC_FOURCC('Y','U','V','P');
559 assert( !p_spu->p_scale );
562 p_scale = vlc_custom_create( p_spu, sizeof(filter_t),
563 VLC_OBJECT_GENERIC, "scale" );
567 es_format_Init( &p_scale->fmt_in, VIDEO_ES, 0 );
568 p_scale->fmt_in.video.i_chroma = i_dummy_chroma;
569 p_scale->fmt_in.video.i_width =
570 p_scale->fmt_in.video.i_height = 32;
572 es_format_Init( &p_scale->fmt_out, VIDEO_ES, 0 );
573 p_scale->fmt_out.video.i_chroma = i_dummy_chroma;
574 p_scale->fmt_out.video.i_width =
575 p_scale->fmt_out.video.i_height = 16;
577 p_scale->pf_vout_buffer_new = spu_new_video_buffer;
578 p_scale->pf_vout_buffer_del = spu_del_video_buffer;
580 vlc_object_attach( p_scale, p_spu );
581 p_scale->p_module = module_Need( p_spu->p_scale, "video filter2", 0, 0 );
585 void spu_RenderSubpictures( spu_t *p_spu, video_format_t *p_fmt,
586 picture_t *p_pic_dst, picture_t *p_pic_src,
587 subpicture_t *p_subpic,
588 int i_scale_width_orig, int i_scale_height_orig )
590 int i_source_video_width;
591 int i_source_video_height;
592 subpicture_t *p_subpic_v = p_subpic;
595 vlc_mutex_lock( &p_spu->subpicture_lock );
597 for( p_subpic_v = p_subpic;
598 p_subpic_v != NULL && p_subpic_v->i_status != FREE_SUBPICTURE;
599 p_subpic_v = p_subpic_v->p_next )
601 if( p_subpic_v->pf_pre_render )
603 p_subpic_v->pf_pre_render( p_fmt, p_spu, p_subpic_v, mdate() );
607 if( i_scale_width_orig <= 0 )
608 i_scale_width_orig = 1;
609 if( i_scale_height_orig <= 0 )
610 i_scale_height_orig = 1;
612 i_source_video_width = p_fmt->i_width * 1000 / i_scale_width_orig;
613 i_source_video_height = p_fmt->i_height * 1000 / i_scale_height_orig;
615 /* Check i_status again to make sure spudec hasn't destroyed the subpic */
616 while( ( p_subpic != NULL ) && ( p_subpic->i_status != FREE_SUBPICTURE ) )
618 subpicture_region_t *p_region;
619 int pi_scale_width[ SCALE_SIZE ];
620 int pi_scale_height[ SCALE_SIZE ];
621 int pi_subpic_x[ SCALE_SIZE ];
624 /* If the source video and subtitles stream agree on the size of
625 * the video then disregard all further references to the subtitle
628 if( ( i_source_video_height == p_subpic->i_original_picture_height ) &&
629 ( i_source_video_width == p_subpic->i_original_picture_width ) )
631 p_subpic->i_original_picture_height = 0;
632 p_subpic->i_original_picture_width = 0;
635 for( k = 0; k < SCALE_SIZE ; k++ )
636 pi_subpic_x[ k ] = p_subpic->i_x;
638 if( p_subpic->pf_update_regions )
640 if ( p_subpic->p_region ) {
641 spu_DestroyRegion( p_spu, p_subpic->p_region );
644 /* TODO do not reverse the scaling that was done before calling
645 * spu_RenderSubpictures, just pass it along (or do it inside
646 * spu_RenderSubpictures) */
647 video_format_t fmt_org = *p_fmt;
649 fmt_org.i_visible_width = i_source_video_width;
651 fmt_org.i_visible_height = i_source_video_height;
653 p_subpic->p_region = p_region = p_subpic->pf_update_regions( &fmt_org, p_spu, p_subpic, mdate() );
657 p_region = p_subpic->p_region;
660 /* Create the blending module */
661 if( !p_spu->p_blend && p_region )
662 SpuRenderCreateBlend( p_spu, p_fmt->i_chroma, p_fmt->i_aspect );
664 /* Load the text rendering module; it is possible there is a
665 * text region somewhere in the subpicture other than the first
666 * element in the region list, so just load it anyway as we'll
667 * probably want it sooner or later. */
668 if( !p_spu->p_text && p_region )
669 SpuRenderCreateAndLoadText( p_spu, p_fmt->i_width, p_fmt->i_height );
673 subpicture_region_t *p_text_region = p_subpic->p_region;
675 /* Only overwrite the size fields if the region is still in
676 * pre-rendered TEXT format. We have to traverse the subregion
677 * list because if more than one subregion is present, the text
678 * region isn't guarentteed to be the first in the list, and
679 * only text regions use this flag. All of this effort assists
680 * with the rescaling of text that has been rendered at native
681 * resolution, rather than video resolution.
683 while( p_text_region &&
684 ( p_text_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') ) )
686 p_text_region = p_text_region->p_next;
690 ( ( p_text_region->i_align & SUBPICTURE_RENDERED ) == 0 ) )
692 if( (p_subpic->i_original_picture_height > 0) &&
693 (p_subpic->i_original_picture_width > 0) )
695 p_spu->p_text->fmt_out.video.i_width =
696 p_spu->p_text->fmt_out.video.i_visible_width =
697 p_subpic->i_original_picture_width;
698 p_spu->p_text->fmt_out.video.i_height =
699 p_spu->p_text->fmt_out.video.i_visible_height =
700 p_subpic->i_original_picture_height;
704 p_spu->p_text->fmt_out.video.i_width =
705 p_spu->p_text->fmt_out.video.i_visible_width =
707 p_spu->p_text->fmt_out.video.i_height =
708 p_spu->p_text->fmt_out.video.i_visible_height =
714 pi_scale_width[ SCALE_DEFAULT ] = i_scale_width_orig;
715 pi_scale_height[ SCALE_DEFAULT ] = i_scale_height_orig;
719 pi_scale_width[ SCALE_TEXT ] = ( p_fmt->i_width * 1000 ) /
720 p_spu->p_text->fmt_out.video.i_width;
721 pi_scale_height[ SCALE_TEXT ] = ( p_fmt->i_height * 1000 ) /
722 p_spu->p_text->fmt_out.video.i_height;
724 /* If we have an explicit size plane to render to, then turn off
725 * the fontsize rescaling.
727 if( (p_subpic->i_original_picture_height > 0) &&
728 (p_subpic->i_original_picture_width > 0) )
730 i_scale_width_orig = 1000;
731 i_scale_height_orig = 1000;
734 for( k = 0; k < SCALE_SIZE ; k++ )
736 /* Case of both width and height being specified has been dealt
737 * with above by instead rendering to an output pane of the
738 * explicit dimensions specified - we don't need to scale it.
740 if( (p_subpic->i_original_picture_height > 0) &&
741 (p_subpic->i_original_picture_width <= 0) )
743 pi_scale_height[ k ] = pi_scale_height[ k ] * i_source_video_height /
744 p_subpic->i_original_picture_height;
745 pi_scale_width[ k ] = pi_scale_width[ k ] * i_source_video_height /
746 p_subpic->i_original_picture_height;
750 /* Set default subpicture aspect ratio */
751 if( p_region && p_region->fmt.i_aspect &&
752 ( !p_region->fmt.i_sar_num || !p_region->fmt.i_sar_den ) )
754 p_region->fmt.i_sar_den = p_region->fmt.i_aspect;
755 p_region->fmt.i_sar_num = VOUT_ASPECT_FACTOR;
758 ( !p_region->fmt.i_sar_num || !p_region->fmt.i_sar_den ) )
760 p_region->fmt.i_sar_den = p_fmt->i_sar_den;
761 p_region->fmt.i_sar_num = p_fmt->i_sar_num;
764 /* Take care of the aspect ratio */
766 ( ( p_region->fmt.i_sar_num * p_fmt->i_sar_den ) !=
767 ( p_region->fmt.i_sar_den * p_fmt->i_sar_num ) ) )
769 for( k = 0; k < SCALE_SIZE ; k++ )
771 pi_scale_width[ k ] = pi_scale_width[ k ] *
772 (int64_t)p_region->fmt.i_sar_num * p_fmt->i_sar_den /
773 p_region->fmt.i_sar_den / p_fmt->i_sar_num;
774 pi_subpic_x[ k ] = p_subpic->i_x * pi_scale_width[ k ] / 1000;
778 /* Load the scaling module */
779 if( !p_spu->p_scale &&
780 ((((pi_scale_width[ SCALE_TEXT ] > 0) || (pi_scale_height[ SCALE_TEXT ] > 0)) &&
781 ((pi_scale_width[ SCALE_TEXT ] != 1000) || (pi_scale_height[ SCALE_TEXT ] != 1000))) ||
782 (((pi_scale_width[ SCALE_DEFAULT ] > 0) || (pi_scale_height[ SCALE_DEFAULT ] > 0)) &&
783 ((pi_scale_width[ SCALE_DEFAULT ] != 1000) || (pi_scale_height[ SCALE_DEFAULT ] != 1000)))) )
785 SpuRenderCreateAndLoadScale( p_spu );
790 video_format_t orig_fmt = p_region->fmt;
791 bool b_rerender_text = false;
792 int i_fade_alpha = 255;
795 int i_scale_idx = SCALE_DEFAULT;
796 int i_inv_scale_x = 1000;
797 int i_inv_scale_y = 1000;
799 if( p_region->fmt.i_chroma == VLC_FOURCC('T','E','X','T') )
801 if( p_spu->p_text && p_spu->p_text->p_module )
805 /* Setup 3 variables which can be used to render
806 * time-dependent text (and effects). The first indicates
807 * the total amount of time the text will be on screen,
808 * the second the amount of time it has already been on
809 * screen (can be a negative value as text is layed out
810 * before it is rendered) and the third is a feedback
811 * variable from the renderer - if the renderer sets it
812 * then this particular text is time-dependent, eg. the
813 * visual progress bar inside the text in karaoke and the
814 * text needs to be rendered multiple times in order for
815 * the effect to work - we therefore need to return the
816 * region to its original state at the end of the loop,
817 * instead of leaving it in YUVA or YUVP.
818 * Any renderer which is unaware of how to render
819 * time-dependent text can happily ignore the variables
820 * and render the text the same as usual - it should at
821 * least show up on screen, but the effect won't change
822 * the text over time.
825 var_Create( p_spu->p_text, "spu-duration", VLC_VAR_TIME );
826 val.i_time = p_subpic->i_stop - p_subpic->i_start;
827 var_Set( p_spu->p_text, "spu-duration", val );
829 var_Create( p_spu->p_text, "spu-elapsed", VLC_VAR_TIME );
830 val.i_time = mdate() - p_subpic->i_start;
831 var_Set( p_spu->p_text, "spu-elapsed", val );
833 var_Create( p_spu->p_text, "text-rerender", VLC_VAR_BOOL );
834 var_SetBool( p_spu->p_text, "text-rerender", false );
836 var_Create( p_spu->p_text, "scale", VLC_VAR_INTEGER );
837 var_SetInteger( p_spu->p_text, "scale",
838 __MIN(i_scale_width_orig, i_scale_height_orig) );
840 if( p_spu->p_text->pf_render_html && p_region->psz_html )
842 p_spu->p_text->pf_render_html( p_spu->p_text,
843 p_region, p_region );
845 else if( p_spu->p_text->pf_render_text )
847 p_spu->p_text->pf_render_text( p_spu->p_text,
848 p_region, p_region );
850 b_rerender_text = var_GetBool( p_spu->p_text, "text-rerender" );
852 var_Destroy( p_spu->p_text, "spu-duration" );
853 var_Destroy( p_spu->p_text, "spu-elapsed" );
854 var_Destroy( p_spu->p_text, "text-rerender" );
855 var_Destroy( p_spu->p_text, "scale" );
857 p_region->i_align |= SUBPICTURE_RENDERED;
860 if( p_region->i_align & SUBPICTURE_RENDERED )
862 i_scale_idx = SCALE_TEXT;
863 i_inv_scale_x = i_scale_width_orig;
864 i_inv_scale_y = i_scale_height_orig;
867 i_x_offset = (p_region->i_x + pi_subpic_x[ i_scale_idx ]) * i_inv_scale_x / 1000;
868 i_y_offset = (p_region->i_y + p_subpic->i_y) * i_inv_scale_y / 1000;
870 /* Force palette if requested */
871 if( p_spu->b_force_palette &&
872 ( VLC_FOURCC('Y','U','V','P') == p_region->fmt.i_chroma ) )
874 memcpy( p_region->fmt.p_palette->palette,
875 p_spu->palette, 16 );
878 /* Scale SPU if necessary */
879 if( p_region->p_cache &&
880 ( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') ) )
882 if( pi_scale_width[ i_scale_idx ] * p_region->fmt.i_width / 1000 !=
883 p_region->p_cache->fmt.i_width ||
884 pi_scale_height[ i_scale_idx ] * p_region->fmt.i_height / 1000 !=
885 p_region->p_cache->fmt.i_height )
887 p_subpic->pf_destroy_region( VLC_OBJECT(p_spu),
889 p_region->p_cache = 0;
893 if( ( ( pi_scale_width[ i_scale_idx ] != 1000 ) ||
894 ( pi_scale_height[ i_scale_idx ] != 1000 ) ) &&
895 ( ( pi_scale_width[ i_scale_idx ] > 0 ) ||
896 ( pi_scale_height[ i_scale_idx ] > 0 ) ) &&
897 p_spu->p_scale && !p_region->p_cache &&
898 ( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') ) )
902 p_spu->p_scale->fmt_in.video = p_region->fmt;
903 p_spu->p_scale->fmt_out.video = p_region->fmt;
906 p_subpic->pf_create_region( VLC_OBJECT(p_spu),
907 &p_spu->p_scale->fmt_out.video );
908 if( p_spu->p_scale->fmt_out.video.p_palette )
909 *p_spu->p_scale->fmt_out.video.p_palette =
910 *p_region->fmt.p_palette;
911 p_region->p_cache->p_next = p_region->p_next;
913 vout_CopyPicture( p_spu, &p_region->p_cache->picture,
914 &p_region->picture );
916 p_spu->p_scale->fmt_out.video.i_width =
917 p_region->fmt.i_width * pi_scale_width[ i_scale_idx ] / 1000;
918 p_spu->p_scale->fmt_out.video.i_visible_width =
919 p_region->fmt.i_visible_width * pi_scale_width[ i_scale_idx ] / 1000;
920 p_spu->p_scale->fmt_out.video.i_height =
921 p_region->fmt.i_height * pi_scale_height[ i_scale_idx ] / 1000;
922 p_spu->p_scale->fmt_out.video.i_visible_height =
923 p_region->fmt.i_visible_height * pi_scale_height[ i_scale_idx ] / 1000;
924 p_region->p_cache->fmt = p_spu->p_scale->fmt_out.video;
925 p_region->p_cache->i_x = p_region->i_x * pi_scale_width[ i_scale_idx ] / 1000;
926 p_region->p_cache->i_y = p_region->i_y * pi_scale_height[ i_scale_idx ] / 1000;
927 p_region->p_cache->i_align = p_region->i_align;
928 p_region->p_cache->i_alpha = p_region->i_alpha;
930 p_pic = p_spu->p_scale->pf_video_filter(
931 p_spu->p_scale, &p_region->p_cache->picture );
934 picture_t p_pic_tmp = p_region->p_cache->picture;
935 p_region->p_cache->picture = *p_pic;
941 if( ( ( pi_scale_width[ i_scale_idx ] != 1000 ) ||
942 ( pi_scale_height[ i_scale_idx ] != 1000 ) ) &&
943 ( ( pi_scale_width[ i_scale_idx ] > 0 ) ||
944 ( pi_scale_height[ i_scale_idx ] > 0 ) ) &&
945 p_spu->p_scale && p_region->p_cache &&
946 ( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') ) )
948 p_region = p_region->p_cache;
951 if( p_region->i_align & SUBPICTURE_ALIGN_BOTTOM )
953 i_y_offset = p_fmt->i_height - p_region->fmt.i_height -
954 (p_subpic->i_y + p_region->i_y) * i_inv_scale_y / 1000;
956 else if ( !(p_region->i_align & SUBPICTURE_ALIGN_TOP) )
958 i_y_offset = p_fmt->i_height / 2 - p_region->fmt.i_height / 2;
961 if( p_region->i_align & SUBPICTURE_ALIGN_RIGHT )
963 i_x_offset = p_fmt->i_width - p_region->fmt.i_width -
964 (pi_subpic_x[ i_scale_idx ] + p_region->i_x)
965 * i_inv_scale_x / 1000;
967 else if ( !(p_region->i_align & SUBPICTURE_ALIGN_LEFT) )
969 i_x_offset = p_fmt->i_width / 2 - p_region->fmt.i_width / 2;
972 if( p_subpic->b_absolute )
974 i_x_offset = (p_region->i_x +
975 pi_subpic_x[ i_scale_idx ] *
976 pi_scale_width[ i_scale_idx ] / 1000)
977 * i_inv_scale_x / 1000;
978 i_y_offset = (p_region->i_y +
979 p_subpic->i_y * pi_scale_height[ i_scale_idx ] / 1000)
980 * i_inv_scale_y / 1000;
984 i_x_offset = __MAX( i_x_offset, 0 );
985 i_y_offset = __MAX( i_y_offset, 0 );
987 if( ( p_spu->i_margin != 0 ) &&
988 ( p_spu->b_force_crop == false ) )
991 int i_low = (i_y_offset - p_spu->i_margin) * i_inv_scale_y / 1000;
992 int i_high = i_low + p_region->fmt.i_height;
994 /* crop extra margin to keep within bounds */
997 if( i_high > (int)p_fmt->i_height )
998 i_diff = i_high - p_fmt->i_height;
999 i_y_offset -= ( p_spu->i_margin * i_inv_scale_y / 1000 + i_diff );
1002 if( p_subpic->b_fade )
1004 mtime_t i_fade_start = ( p_subpic->i_stop +
1005 p_subpic->i_start ) / 2;
1006 mtime_t i_now = mdate();
1007 if( i_now >= i_fade_start && p_subpic->i_stop > i_fade_start )
1009 i_fade_alpha = 255 * ( p_subpic->i_stop - i_now ) /
1010 ( p_subpic->i_stop - i_fade_start );
1014 if( p_region->fmt.i_chroma != VLC_FOURCC('T','E','X','T') )
1017 SpuRenderUpdateBlend( p_spu, &p_region->fmt );
1019 /* Force cropping if requested */
1020 if( p_spu->b_force_crop )
1022 video_format_t *p_fmt = &p_spu->p_blend->fmt_in.video;
1023 int i_crop_x = p_spu->i_crop_x * pi_scale_width[ i_scale_idx ] / 1000
1024 * i_inv_scale_x / 1000;
1025 int i_crop_y = p_spu->i_crop_y * pi_scale_height[ i_scale_idx ] / 1000
1026 * i_inv_scale_y / 1000;
1027 int i_crop_width = p_spu->i_crop_width * pi_scale_width[ i_scale_idx ] / 1000
1028 * i_inv_scale_x / 1000;
1029 int i_crop_height = p_spu->i_crop_height * pi_scale_height[ i_scale_idx ] / 1000
1030 * i_inv_scale_y / 1000;
1032 /* Find the intersection */
1033 if( i_crop_x + i_crop_width <= i_x_offset ||
1034 i_x_offset + (int)p_fmt->i_visible_width < i_crop_x ||
1035 i_crop_y + i_crop_height <= i_y_offset ||
1036 i_y_offset + (int)p_fmt->i_visible_height < i_crop_y )
1038 /* No intersection */
1039 p_fmt->i_visible_width = p_fmt->i_visible_height = 0;
1043 int i_x, i_y, i_x_end, i_y_end;
1044 i_x = __MAX( i_crop_x, i_x_offset );
1045 i_y = __MAX( i_crop_y, i_y_offset );
1046 i_x_end = __MIN( i_crop_x + i_crop_width,
1047 i_x_offset + (int)p_fmt->i_visible_width );
1048 i_y_end = __MIN( i_crop_y + i_crop_height,
1049 i_y_offset + (int)p_fmt->i_visible_height );
1051 p_fmt->i_x_offset = i_x - i_x_offset;
1052 p_fmt->i_y_offset = i_y - i_y_offset;
1053 p_fmt->i_visible_width = i_x_end - i_x;
1054 p_fmt->i_visible_height = i_y_end - i_y;
1061 i_x_offset = __MAX( i_x_offset, 0 );
1062 i_y_offset = __MAX( i_y_offset, 0 );
1064 /* Update the output picture size */
1065 p_spu->p_blend->fmt_out.video.i_width =
1066 p_spu->p_blend->fmt_out.video.i_visible_width =
1068 p_spu->p_blend->fmt_out.video.i_height =
1069 p_spu->p_blend->fmt_out.video.i_visible_height =
1072 if( p_spu->p_blend->p_module )
1074 p_spu->p_blend->pf_video_blend( p_spu->p_blend, p_pic_dst,
1075 p_pic_src, &p_region->picture, i_x_offset, i_y_offset,
1076 i_fade_alpha * p_subpic->i_alpha * p_region->i_alpha / 65025 );
1080 msg_Err( p_spu, "blending %4.4s to %4.4s failed",
1081 (char *)&p_spu->p_blend->fmt_out.video.i_chroma,
1082 (char *)&p_spu->p_blend->fmt_out.video.i_chroma );
1086 if( b_rerender_text )
1088 /* Some forms of subtitles need to be re-rendered more than
1089 * once, eg. karaoke. We therefore restore the region to its
1090 * pre-rendered state, so the next time through everything is
1093 p_region->picture.pf_release( &p_region->picture );
1094 memset( &p_region->picture, 0, sizeof( picture_t ) );
1095 p_region->fmt = orig_fmt;
1096 p_region->i_align &= ~SUBPICTURE_RENDERED;
1098 p_region = p_region->p_next;
1101 p_subpic = p_subpic->p_next;
1104 vlc_mutex_unlock( &p_spu->subpicture_lock );
1107 /*****************************************************************************
1108 * spu_SortSubpictures: find the subpictures to display
1109 *****************************************************************************
1110 * This function parses all subpictures and decides which ones need to be
1111 * displayed. This operation does not need lock, since only READY_SUBPICTURE
1112 * are handled. If no picture has been selected, display_date will depend on
1114 * We also check for ephemer DVD subpictures (subpictures that have
1115 * to be removed if a newer one is available), which makes it a lot
1116 * more difficult to guess if a subpicture has to be rendered or not.
1117 *****************************************************************************/
1118 subpicture_t *spu_SortSubpictures( spu_t *p_spu, mtime_t display_date,
1121 int i_index, i_channel;
1122 subpicture_t *p_subpic = NULL;
1123 subpicture_t *p_ephemer;
1124 mtime_t ephemer_date;
1126 /* Run subpicture filters */
1127 filter_chain_SubFilter( p_spu->p_chain, display_date );
1129 /* We get an easily parsable chained list of subpictures which
1130 * ends with NULL since p_subpic was initialized to NULL. */
1131 for( i_channel = 0; i_channel < p_spu->i_channel; i_channel++ )
1136 for( i_index = 0; i_index < VOUT_MAX_SUBPICTURES; i_index++ )
1138 if( p_spu->p_subpicture[i_index].i_channel != i_channel ||
1139 p_spu->p_subpicture[i_index].i_status != READY_SUBPICTURE )
1144 display_date < p_spu->p_subpicture[i_index].i_start )
1146 /* Too early, come back next monday */
1150 if( p_spu->p_subpicture[i_index].i_start > ephemer_date )
1151 ephemer_date = p_spu->p_subpicture[i_index].i_start;
1153 if( display_date > p_spu->p_subpicture[i_index].i_stop &&
1154 ( !p_spu->p_subpicture[i_index].b_ephemer ||
1155 p_spu->p_subpicture[i_index].i_stop >
1156 p_spu->p_subpicture[i_index].i_start ) &&
1157 !( p_spu->p_subpicture[i_index].b_pausable &&
1160 /* Too late, destroy the subpic */
1161 spu_DestroySubpicture( p_spu, &p_spu->p_subpicture[i_index] );
1165 /* If this is an ephemer subpic, add it to our list */
1166 if( p_spu->p_subpicture[i_index].b_ephemer )
1168 p_spu->p_subpicture[i_index].p_next = p_ephemer;
1169 p_ephemer = &p_spu->p_subpicture[i_index];
1174 p_spu->p_subpicture[i_index].p_next = p_subpic;
1175 p_subpic = &p_spu->p_subpicture[i_index];
1178 /* If we found ephemer subpictures, check if they have to be
1179 * displayed or destroyed */
1180 while( p_ephemer != NULL )
1182 subpicture_t *p_tmp = p_ephemer;
1183 p_ephemer = p_ephemer->p_next;
1185 if( p_tmp->i_start < ephemer_date )
1187 /* Ephemer subpicture has lived too long */
1188 spu_DestroySubpicture( p_spu, p_tmp );
1192 /* Ephemer subpicture can still live a bit */
1193 p_tmp->p_next = p_subpic;
1202 /*****************************************************************************
1203 * SpuClearChannel: clear an spu channel
1204 *****************************************************************************
1205 * This function destroys the subpictures which belong to the spu channel
1206 * corresponding to i_channel_id.
1207 *****************************************************************************/
1208 static void SpuClearChannel( spu_t *p_spu, int i_channel, bool b_locked )
1210 int i_subpic; /* subpicture index */
1211 subpicture_t *p_subpic = NULL; /* first free subpicture */
1214 vlc_mutex_lock( &p_spu->subpicture_lock );
1216 for( i_subpic = 0; i_subpic < VOUT_MAX_SUBPICTURES; i_subpic++ )
1218 p_subpic = &p_spu->p_subpicture[i_subpic];
1219 if( p_subpic->i_status == FREE_SUBPICTURE
1220 || ( p_subpic->i_status != RESERVED_SUBPICTURE
1221 && p_subpic->i_status != READY_SUBPICTURE ) )
1226 if( p_subpic->i_channel == i_channel )
1228 while( p_subpic->p_region )
1230 subpicture_region_t *p_region = p_subpic->p_region;
1231 p_subpic->p_region = p_region->p_next;
1232 spu_DestroyRegion( p_spu, p_region );
1235 if( p_subpic->pf_destroy ) p_subpic->pf_destroy( p_subpic );
1236 p_subpic->i_status = FREE_SUBPICTURE;
1241 vlc_mutex_unlock( &p_spu->subpicture_lock );
1244 /*****************************************************************************
1245 * spu_ControlDefault: default methods for the subpicture unit control.
1246 *****************************************************************************/
1247 static int spu_vaControlDefault( spu_t *p_spu, int i_query, va_list args )
1253 case SPU_CHANNEL_REGISTER:
1254 pi = (int *)va_arg( args, int * );
1255 if( pi ) *pi = p_spu->i_channel++;
1258 case SPU_CHANNEL_CLEAR:
1259 i = (int)va_arg( args, int );
1260 SpuClearChannel( p_spu, i, false );
1264 msg_Dbg( p_spu, "control query not supported" );
1265 return VLC_EGENERIC;
1271 /*****************************************************************************
1272 * Object variables callbacks
1273 *****************************************************************************/
1275 /*****************************************************************************
1276 * UpdateSPU: update subpicture settings
1277 *****************************************************************************
1278 * This function is called from CropCallback and at initialization time, to
1279 * retrieve crop information from the input.
1280 *****************************************************************************/
1281 static void UpdateSPU( spu_t *p_spu, vlc_object_t *p_object )
1285 p_spu->b_force_palette = false;
1286 p_spu->b_force_crop = false;
1288 if( var_Get( p_object, "highlight", &val ) || !val.b_bool ) return;
1290 p_spu->b_force_crop = true;
1291 var_Get( p_object, "x-start", &val );
1292 p_spu->i_crop_x = val.i_int;
1293 var_Get( p_object, "y-start", &val );
1294 p_spu->i_crop_y = val.i_int;
1295 var_Get( p_object, "x-end", &val );
1296 p_spu->i_crop_width = val.i_int - p_spu->i_crop_x;
1297 var_Get( p_object, "y-end", &val );
1298 p_spu->i_crop_height = val.i_int - p_spu->i_crop_y;
1300 if( var_Get( p_object, "menu-palette", &val ) == VLC_SUCCESS )
1302 memcpy( p_spu->palette, val.p_address, 16 );
1303 p_spu->b_force_palette = true;
1306 msg_Dbg( p_object, "crop: %i,%i,%i,%i, palette forced: %i",
1307 p_spu->i_crop_x, p_spu->i_crop_y,
1308 p_spu->i_crop_width, p_spu->i_crop_height,
1309 p_spu->b_force_palette );
1312 /*****************************************************************************
1313 * CropCallback: called when the highlight properties are changed
1314 *****************************************************************************
1315 * This callback is called from the input thread when we need cropping
1316 *****************************************************************************/
1317 static int CropCallback( vlc_object_t *p_object, char const *psz_var,
1318 vlc_value_t oldval, vlc_value_t newval, void *p_data )
1320 (void)psz_var; (void)oldval; (void)newval;
1321 UpdateSPU( (spu_t *)p_data, p_object );
1325 /*****************************************************************************
1326 * Buffers allocation callbacks for the filters
1327 *****************************************************************************/
1328 static subpicture_t *sub_new_buffer( filter_t *p_filter )
1330 filter_owner_sys_t *p_sys = p_filter->p_owner;
1331 subpicture_t *p_subpicture = spu_CreateSubpicture( p_sys->p_spu );
1332 if( p_subpicture ) p_subpicture->i_channel = p_sys->i_channel;
1333 return p_subpicture;
1336 static void sub_del_buffer( filter_t *p_filter, subpicture_t *p_subpic )
1338 filter_owner_sys_t *p_sys = p_filter->p_owner;
1339 spu_DestroySubpicture( p_sys->p_spu, p_subpic );
1342 static subpicture_t *spu_new_buffer( filter_t *p_filter )
1345 subpicture_t *p_subpic = (subpicture_t *)malloc(sizeof(subpicture_t));
1346 if( !p_subpic ) return NULL;
1347 memset( p_subpic, 0, sizeof(subpicture_t) );
1348 p_subpic->b_absolute = true;
1350 p_subpic->pf_create_region = __spu_CreateRegion;
1351 p_subpic->pf_make_region = __spu_MakeRegion;
1352 p_subpic->pf_destroy_region = __spu_DestroyRegion;
1357 static void spu_del_buffer( filter_t *p_filter, subpicture_t *p_subpic )
1359 while( p_subpic->p_region )
1361 subpicture_region_t *p_region = p_subpic->p_region;
1362 p_subpic->p_region = p_region->p_next;
1363 p_subpic->pf_destroy_region( VLC_OBJECT(p_filter), p_region );
1369 static picture_t *spu_new_video_buffer( filter_t *p_filter )
1371 picture_t *p_picture = malloc( sizeof(picture_t) );
1372 if( !p_picture ) return NULL;
1373 if( vout_AllocatePicture( p_filter, p_picture,
1374 p_filter->fmt_out.video.i_chroma,
1375 p_filter->fmt_out.video.i_width,
1376 p_filter->fmt_out.video.i_height,
1377 p_filter->fmt_out.video.i_aspect )
1384 p_picture->pf_release = RegionPictureRelease;
1389 static void spu_del_video_buffer( filter_t *p_filter, picture_t *p_pic )
1394 free( p_pic->p_data_orig );
1399 static int SubFilterCallback( vlc_object_t *p_object, char const *psz_var,
1400 vlc_value_t oldval, vlc_value_t newval, void *p_data )
1402 VLC_UNUSED(p_object); VLC_UNUSED(oldval);
1403 VLC_UNUSED(newval); VLC_UNUSED(psz_var);
1405 spu_t *p_spu = (spu_t *)p_data;
1406 vlc_mutex_lock( &p_spu->subpicture_lock );
1407 filter_chain_Reset( p_spu->p_chain, NULL, NULL );
1408 spu_ParseChain( p_spu );
1409 vlc_mutex_unlock( &p_spu->subpicture_lock );
1413 static int sub_filter_allocation_init( filter_t *p_filter, void *p_data )
1415 spu_t *p_spu = (spu_t *)p_data;
1417 p_filter->pf_sub_buffer_new = sub_new_buffer;
1418 p_filter->pf_sub_buffer_del = sub_del_buffer;
1420 filter_owner_sys_t *p_sys = malloc( sizeof(filter_owner_sys_t) );
1421 if( !p_sys ) return VLC_EGENERIC;
1423 p_filter->p_owner = p_sys;
1424 spu_Control( p_spu, SPU_CHANNEL_REGISTER, &p_sys->i_channel );
1425 p_sys->p_spu = p_spu;
1430 static void sub_filter_allocation_clear( filter_t *p_filter )
1432 filter_owner_sys_t *p_sys = p_filter->p_owner;
1433 SpuClearChannel( p_sys->p_spu, p_sys->i_channel, true );
1434 free( p_filter->p_owner );