1 /*****************************************************************************
2 * transform.c : transform image module for vlc
3 *****************************************************************************
4 * Copyright (C) 2000-2006 the VideoLAN team
7 * Authors: Samuel Hocevar <sam@zoy.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
36 #include "filter_common.h"
37 #include "filter_picture.h"
39 #define TRANSFORM_MODE_HFLIP 1
40 #define TRANSFORM_MODE_VFLIP 2
41 #define TRANSFORM_MODE_90 3
42 #define TRANSFORM_MODE_180 4
43 #define TRANSFORM_MODE_270 5
45 /*****************************************************************************
47 *****************************************************************************/
48 static int Create ( vlc_object_t * );
49 static void Destroy ( vlc_object_t * );
51 static int Init ( vout_thread_t * );
52 static void End ( vout_thread_t * );
53 static void Render ( vout_thread_t *, picture_t * );
55 static void FilterPlanar( vout_thread_t *, const picture_t *, picture_t * );
56 static void FilterI422( vout_thread_t *, const picture_t *, picture_t * );
57 static void FilterYUYV( vout_thread_t *, const picture_t *, picture_t * );
59 static int MouseEvent( vlc_object_t *, char const *,
60 vlc_value_t, vlc_value_t, void * );
62 /*****************************************************************************
64 *****************************************************************************/
65 #define TYPE_TEXT N_("Transform type")
66 #define TYPE_LONGTEXT N_("One of '90', '180', '270', 'hflip' and 'vflip'")
68 static const char *const type_list[] = { "90", "180", "270", "hflip", "vflip" };
69 static const char *const type_list_text[] = { N_("Rotate by 90 degrees"),
70 N_("Rotate by 180 degrees"), N_("Rotate by 270 degrees"),
71 N_("Flip horizontally"), N_("Flip vertically") };
73 #define CFG_PREFIX "transform-"
76 set_description( N_("Video transformation filter") )
77 set_shortname( N_("Transformation"))
78 set_capability( "video filter", 0 )
79 set_category( CAT_VIDEO )
80 set_subcategory( SUBCAT_VIDEO_VFILTER )
82 add_string( CFG_PREFIX "type", "90", NULL,
83 TYPE_TEXT, TYPE_LONGTEXT, false)
84 change_string_list( type_list, type_list_text, 0)
86 add_shortcut( "transform" )
87 set_callbacks( Create, Destroy )
90 static const char *const ppsz_filter_options[] = {
94 /*****************************************************************************
95 * vout_sys_t: Transform video output method descriptor
96 *****************************************************************************
97 * This structure is part of the video output thread descriptor.
98 * It describes the Transform specific properties of an output thread.
99 *****************************************************************************/
104 vout_thread_t *p_vout;
106 void (*pf_filter)( vout_thread_t *, const picture_t *, picture_t * );
109 /*****************************************************************************
110 * Control: control facility for the vout (forwards to child vout)
111 *****************************************************************************/
112 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
114 return vout_vaControl( p_vout->p_sys->p_vout, i_query, args );
117 /*****************************************************************************
118 * Create: allocates Transform video thread output method
119 *****************************************************************************
120 * This function allocates and initializes a Transform vout method.
121 *****************************************************************************/
122 static int Create( vlc_object_t *p_this )
124 vout_thread_t *p_vout = (vout_thread_t *)p_this;
127 /* Allocate structure */
128 p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
129 if( p_vout->p_sys == NULL )
132 p_vout->pf_init = Init;
133 p_vout->pf_end = End;
134 p_vout->pf_manage = NULL;
135 p_vout->pf_render = Render;
136 p_vout->pf_display = NULL;
137 p_vout->pf_control = Control;
139 config_ChainParse( p_vout, CFG_PREFIX, ppsz_filter_options,
142 /* Look what method was requested */
143 psz_method = var_CreateGetNonEmptyStringCommand( p_vout, "transform-type" );
145 switch( p_vout->fmt_in.i_chroma )
147 CASE_PLANAR_YUV_SQUARE
149 p_vout->p_sys->pf_filter = FilterPlanar;
154 p_vout->p_sys->pf_filter = FilterI422;
158 p_vout->p_sys->pf_filter = FilterYUYV;
162 msg_Err( p_vout, "Unsupported chroma" );
163 free( p_vout->p_sys );
167 if( psz_method == NULL )
169 msg_Err( p_vout, "configuration variable %s empty", "transform-type" );
170 msg_Err( p_vout, "no valid transform mode provided, using '90'" );
171 p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
172 p_vout->p_sys->b_rotation = 1;
176 if( !strcmp( psz_method, "hflip" ) )
178 p_vout->p_sys->i_mode = TRANSFORM_MODE_HFLIP;
179 p_vout->p_sys->b_rotation = 0;
181 else if( !strcmp( psz_method, "vflip" ) )
183 p_vout->p_sys->i_mode = TRANSFORM_MODE_VFLIP;
184 p_vout->p_sys->b_rotation = 0;
186 else if( !strcmp( psz_method, "90" ) )
188 p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
189 p_vout->p_sys->b_rotation = 1;
191 else if( !strcmp( psz_method, "180" ) )
193 p_vout->p_sys->i_mode = TRANSFORM_MODE_180;
194 p_vout->p_sys->b_rotation = 0;
196 else if( !strcmp( psz_method, "270" ) )
198 p_vout->p_sys->i_mode = TRANSFORM_MODE_270;
199 p_vout->p_sys->b_rotation = 1;
203 msg_Err( p_vout, "no valid transform mode provided, using '90'" );
204 p_vout->p_sys->i_mode = TRANSFORM_MODE_90;
205 p_vout->p_sys->b_rotation = 1;
214 /*****************************************************************************
215 * Init: initialize Transform video thread output method
216 *****************************************************************************/
217 static int Init( vout_thread_t *p_vout )
221 I_OUTPUTPICTURES = 0;
222 memset( &fmt, 0, sizeof(video_format_t) );
224 /* Initialize the output structure */
225 p_vout->output.i_chroma = p_vout->render.i_chroma;
226 p_vout->output.i_width = p_vout->render.i_width;
227 p_vout->output.i_height = p_vout->render.i_height;
228 p_vout->output.i_aspect = p_vout->render.i_aspect;
229 p_vout->fmt_out = p_vout->fmt_in;
230 fmt = p_vout->fmt_out;
232 /* Try to open the real video output */
233 msg_Dbg( p_vout, "spawning the real video output" );
235 if( p_vout->p_sys->b_rotation )
237 fmt.i_width = p_vout->fmt_out.i_height;
238 fmt.i_visible_width = p_vout->fmt_out.i_visible_height;
239 fmt.i_x_offset = p_vout->fmt_out.i_y_offset;
241 fmt.i_height = p_vout->fmt_out.i_width;
242 fmt.i_visible_height = p_vout->fmt_out.i_visible_width;
243 fmt.i_y_offset = p_vout->fmt_out.i_x_offset;
245 fmt.i_aspect = VOUT_ASPECT_FACTOR *
246 (uint64_t)VOUT_ASPECT_FACTOR / fmt.i_aspect;
248 fmt.i_sar_num = p_vout->fmt_out.i_sar_den;
249 fmt.i_sar_den = p_vout->fmt_out.i_sar_num;
252 p_vout->p_sys->p_vout = vout_Create( p_vout, &fmt );
254 /* Everything failed */
255 if( p_vout->p_sys->p_vout == NULL )
257 msg_Err( p_vout, "cannot open vout, aborting" );
261 vout_filter_AllocateDirectBuffers( p_vout, VOUT_MAX_PICTURES );
263 vout_filter_AddChild( p_vout, p_vout->p_sys->p_vout, MouseEvent );
268 /*****************************************************************************
269 * End: terminate Transform video thread output method
270 *****************************************************************************/
271 static void End( vout_thread_t *p_vout )
273 vout_sys_t *p_sys = p_vout->p_sys;
275 vout_filter_DelChild( p_vout, p_sys->p_vout, MouseEvent );
276 vout_CloseAndRelease( p_sys->p_vout );
278 vout_filter_ReleaseDirectBuffers( p_vout );
281 /*****************************************************************************
282 * Destroy: destroy Transform video thread output method
283 *****************************************************************************
284 * Terminate an output method created by TransformCreateOutputMethod
285 *****************************************************************************/
286 static void Destroy( vlc_object_t *p_this )
288 vout_thread_t *p_vout = (vout_thread_t *)p_this;
290 free( p_vout->p_sys );
293 /*****************************************************************************
294 * Render: displays previously rendered output
295 *****************************************************************************
296 * This function send the currently rendered image to Transform image, waits
297 * until it is displayed and switch the two rendering buffers, preparing next
299 *****************************************************************************/
300 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
304 /* This is a new frame. Get a structure from the video_output. */
305 while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
308 if( !vlc_object_alive (p_vout) || p_vout->b_error )
312 msleep( VOUT_OUTMEM_SLEEP );
315 p_outpic->date = p_pic->date;
316 vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
318 p_vout->p_sys->pf_filter( p_vout, p_pic, p_outpic );
320 vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
322 vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
326 * Forward mouse event with proper conversion.
328 static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
329 vlc_value_t oldval, vlc_value_t newval, void *p_data )
331 vout_thread_t *p_vout = p_data;
332 VLC_UNUSED(p_this); VLC_UNUSED(oldval);
334 /* Translate the mouse coordinates
335 * FIXME missing lock */
336 if( !strcmp( psz_var, "mouse-x" ) )
338 switch( p_vout->p_sys->i_mode )
340 case TRANSFORM_MODE_270:
341 newval.i_int = p_vout->p_sys->p_vout->output.i_width
343 case TRANSFORM_MODE_90:
347 case TRANSFORM_MODE_180:
348 case TRANSFORM_MODE_HFLIP:
349 newval.i_int = p_vout->p_sys->p_vout->output.i_width
353 case TRANSFORM_MODE_VFLIP:
358 else if( !strcmp( psz_var, "mouse-y" ) )
360 switch( p_vout->p_sys->i_mode )
362 case TRANSFORM_MODE_90:
363 newval.i_int = p_vout->p_sys->p_vout->output.i_height
365 case TRANSFORM_MODE_270:
369 case TRANSFORM_MODE_180:
370 case TRANSFORM_MODE_VFLIP:
371 newval.i_int = p_vout->p_sys->p_vout->output.i_height
375 case TRANSFORM_MODE_HFLIP:
381 return var_Set( p_vout, psz_var, newval );
384 static void FilterPlanar( vout_thread_t *p_vout,
385 const picture_t *p_pic, picture_t *p_outpic )
388 switch( p_vout->p_sys->i_mode )
390 case TRANSFORM_MODE_90:
391 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
393 int i_pitch = p_pic->p[i_index].i_pitch;
395 uint8_t *p_in = p_pic->p[i_index].p_pixels;
397 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
398 uint8_t *p_out_end = p_out +
399 p_outpic->p[i_index].i_visible_lines *
400 p_outpic->p[i_index].i_pitch;
402 for( ; p_out < p_out_end ; )
406 p_out_end -= p_outpic->p[i_index].i_pitch
407 - p_outpic->p[i_index].i_visible_pitch;
408 p_line_end = p_in + p_pic->p[i_index].i_visible_lines *
411 for( ; p_in < p_line_end ; )
413 p_line_end -= i_pitch;
414 *(--p_out_end) = *p_line_end;
422 case TRANSFORM_MODE_180:
423 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
425 uint8_t *p_in = p_pic->p[i_index].p_pixels;
426 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
427 * p_pic->p[i_index].i_pitch;
429 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
431 for( ; p_in < p_in_end ; )
433 uint8_t *p_line_start = p_in_end
434 - p_pic->p[i_index].i_pitch;
435 p_in_end -= p_pic->p[i_index].i_pitch
436 - p_pic->p[i_index].i_visible_pitch;
438 for( ; p_line_start < p_in_end ; )
440 *p_out++ = *(--p_in_end);
443 p_out += p_outpic->p[i_index].i_pitch
444 - p_outpic->p[i_index].i_visible_pitch;
449 case TRANSFORM_MODE_270:
450 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
452 int i_pitch = p_pic->p[i_index].i_pitch;
454 uint8_t *p_in = p_pic->p[i_index].p_pixels;
456 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
457 uint8_t *p_out_end = p_out +
458 p_outpic->p[i_index].i_visible_lines *
459 p_outpic->p[i_index].i_pitch;
461 for( ; p_out < p_out_end ; )
465 p_in_end = p_in + p_pic->p[i_index].i_visible_lines *
468 for( ; p_in < p_in_end ; )
471 *p_out++ = *p_in_end;
474 p_out += p_outpic->p[i_index].i_pitch
475 - p_outpic->p[i_index].i_visible_pitch;
481 case TRANSFORM_MODE_HFLIP:
482 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
484 uint8_t *p_in = p_pic->p[i_index].p_pixels;
485 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
486 * p_pic->p[i_index].i_pitch;
488 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
490 for( ; p_in < p_in_end ; )
492 p_in_end -= p_pic->p[i_index].i_pitch;
493 vlc_memcpy( p_out, p_in_end,
494 p_pic->p[i_index].i_visible_pitch );
495 p_out += p_pic->p[i_index].i_pitch;
500 case TRANSFORM_MODE_VFLIP:
501 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
503 uint8_t *p_in = p_pic->p[i_index].p_pixels;
504 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
505 * p_pic->p[i_index].i_pitch;
507 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
509 for( ; p_in < p_in_end ; )
511 uint8_t *p_line_end = p_in
512 + p_pic->p[i_index].i_visible_pitch;
514 for( ; p_in < p_line_end ; )
516 *p_out++ = *(--p_line_end);
519 p_in += p_pic->p[i_index].i_pitch;
529 static void FilterI422( vout_thread_t *p_vout,
530 const picture_t *p_pic, picture_t *p_outpic )
533 switch( p_vout->p_sys->i_mode )
535 case TRANSFORM_MODE_180:
536 case TRANSFORM_MODE_HFLIP:
537 case TRANSFORM_MODE_VFLIP:
538 /* Fall back on the default implementation */
539 FilterPlanar( p_vout, p_pic, p_outpic );
542 case TRANSFORM_MODE_90:
543 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
545 int i_pitch = p_pic->p[i_index].i_pitch;
547 uint8_t *p_in = p_pic->p[i_index].p_pixels;
549 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
550 uint8_t *p_out_end = p_out +
551 p_outpic->p[i_index].i_visible_lines *
552 p_outpic->p[i_index].i_pitch;
556 for( ; p_out < p_out_end ; )
560 p_out_end -= p_outpic->p[i_index].i_pitch
561 - p_outpic->p[i_index].i_visible_pitch;
562 p_line_end = p_in + p_pic->p[i_index].i_visible_lines *
565 for( ; p_in < p_line_end ; )
567 p_line_end -= i_pitch;
568 *(--p_out_end) = *p_line_end;
574 else /* i_index == 1 or 2 */
576 for( ; p_out < p_out_end ; )
578 uint8_t *p_line_end, *p_out_end2;
580 p_out_end -= p_outpic->p[i_index].i_pitch
581 - p_outpic->p[i_index].i_visible_pitch;
582 p_out_end2 = p_out_end - p_outpic->p[i_index].i_pitch;
583 p_line_end = p_in + p_pic->p[i_index].i_visible_lines *
586 for( ; p_in < p_line_end ; )
590 p_line_end -= i_pitch;
592 p_line_end -= i_pitch;
595 /* Trick for (x+y)/2 without overflow, based on
596 * x + y == (x ^ y) + 2 * (x & y) */
597 *(--p_out_end) = (p1 & p2) + ((p1 ^ p2) / 2);
598 *(--p_out_end2) = (p1 & p2) + ((p1 ^ p2) / 2);
601 p_out_end = p_out_end2;
608 case TRANSFORM_MODE_270:
609 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
611 int i_pitch = p_pic->p[i_index].i_pitch;
613 uint8_t *p_in = p_pic->p[i_index].p_pixels;
615 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
616 uint8_t *p_out_end = p_out +
617 p_outpic->p[i_index].i_visible_lines *
618 p_outpic->p[i_index].i_pitch;
622 for( ; p_out < p_out_end ; )
626 p_in_end = p_in + p_pic->p[i_index].i_visible_lines *
629 for( ; p_in < p_in_end ; )
632 *p_out++ = *p_in_end;
635 p_out += p_outpic->p[i_index].i_pitch
636 - p_outpic->p[i_index].i_visible_pitch;
640 else /* i_index == 1 or 2 */
642 for( ; p_out < p_out_end ; )
644 uint8_t *p_in_end, *p_out2;
646 p_in_end = p_in + p_pic->p[i_index].i_visible_lines *
648 p_out2 = p_out + p_outpic->p[i_index].i_pitch;
650 for( ; p_in < p_in_end ; )
659 /* Trick for (x+y)/2 without overflow, based on
660 * x + y == (x ^ y) + 2 * (x & y) */
661 *p_out++ = (p1 & p2) + ((p1 ^ p2) / 2);
662 *p_out2++ = (p1 & p2) + ((p1 ^ p2) / 2);
665 p_out2 += p_outpic->p[i_index].i_pitch
666 - p_outpic->p[i_index].i_visible_pitch;
679 static void FilterYUYV( vout_thread_t *p_vout,
680 const picture_t *p_pic, picture_t *p_outpic )
683 int i_y_offset, i_u_offset, i_v_offset;
684 if( GetPackedYuvOffsets( p_pic->format.i_chroma, &i_y_offset,
685 &i_u_offset, &i_v_offset ) != VLC_SUCCESS )
688 switch( p_vout->p_sys->i_mode )
690 case TRANSFORM_MODE_HFLIP:
691 /* Fall back on the default implementation */
692 FilterPlanar( p_vout, p_pic, p_outpic );
695 case TRANSFORM_MODE_90:
696 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
698 int i_pitch = p_pic->p[i_index].i_pitch;
700 uint8_t *p_in = p_pic->p[i_index].p_pixels;
702 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
703 uint8_t *p_out_end = p_out +
704 p_outpic->p[i_index].i_visible_lines *
705 p_outpic->p[i_index].i_pitch;
707 int i_offset = i_u_offset;
708 int i_offset2 = i_v_offset;
709 for( ; p_out < p_out_end ; )
713 p_out_end -= p_outpic->p[i_index].i_pitch
714 - p_outpic->p[i_index].i_visible_pitch;
715 p_line_end = p_in + p_pic->p[i_index].i_visible_lines *
718 for( ; p_in < p_line_end ; )
720 p_line_end -= i_pitch;
722 p_out_end[i_y_offset+2] = p_line_end[i_y_offset];
723 p_out_end[i_u_offset] = p_line_end[i_offset];
724 p_line_end -= i_pitch;
725 p_out_end[i_y_offset] = p_line_end[i_y_offset];
726 p_out_end[i_v_offset] = p_line_end[i_offset2];
733 i_offset = i_offset2;
740 case TRANSFORM_MODE_180:
741 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
743 uint8_t *p_in = p_pic->p[i_index].p_pixels;
744 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
745 * p_pic->p[i_index].i_pitch;
747 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
749 for( ; p_in < p_in_end ; )
751 uint8_t *p_line_start = p_in_end
752 - p_pic->p[i_index].i_pitch;
753 p_in_end -= p_pic->p[i_index].i_pitch
754 - p_pic->p[i_index].i_visible_pitch;
756 for( ; p_line_start < p_in_end ; )
759 p_out[i_y_offset] = p_in_end[i_y_offset+2];
760 p_out[i_u_offset] = p_in_end[i_u_offset];
761 p_out[i_y_offset+2] = p_in_end[i_y_offset];
762 p_out[i_v_offset] = p_in_end[i_v_offset];
766 p_out += p_outpic->p[i_index].i_pitch
767 - p_outpic->p[i_index].i_visible_pitch;
772 case TRANSFORM_MODE_270:
773 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
775 int i_pitch = p_pic->p[i_index].i_pitch;
777 uint8_t *p_in = p_pic->p[i_index].p_pixels;
779 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
780 uint8_t *p_out_end = p_out +
781 p_outpic->p[i_index].i_visible_lines *
782 p_outpic->p[i_index].i_pitch;
784 int i_offset = i_u_offset;
785 int i_offset2 = i_v_offset;
786 for( ; p_out < p_out_end ; )
791 + p_pic->p[i_index].i_visible_lines * i_pitch;
793 for( ; p_in < p_in_end ; )
796 p_out[i_y_offset] = p_in_end[i_y_offset];
797 p_out[i_u_offset] = p_in_end[i_offset];
799 p_out[i_y_offset+2] = p_in_end[i_y_offset];
800 p_out[i_v_offset] = p_in_end[i_offset2];
804 p_out += p_outpic->p[i_index].i_pitch
805 - p_outpic->p[i_index].i_visible_pitch;
810 i_offset = i_offset2;
817 case TRANSFORM_MODE_VFLIP:
818 for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
820 uint8_t *p_in = p_pic->p[i_index].p_pixels;
821 uint8_t *p_in_end = p_in + p_pic->p[i_index].i_visible_lines
822 * p_pic->p[i_index].i_pitch;
824 uint8_t *p_out = p_outpic->p[i_index].p_pixels;
826 for( ; p_in < p_in_end ; )
828 uint8_t *p_line_end = p_in
829 + p_pic->p[i_index].i_visible_pitch;
831 for( ; p_in < p_line_end ; )
834 p_out[i_y_offset] = p_line_end[i_y_offset+2];
835 p_out[i_u_offset] = p_line_end[i_u_offset];
836 p_out[i_y_offset+2] = p_line_end[i_y_offset];
837 p_out[i_v_offset] = p_line_end[i_v_offset];
841 p_in += p_pic->p[i_index].i_pitch;