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[vlc] / modules / video_filter / adjust.c
1 /*****************************************************************************
2  * adjust.c : Contrast/Hue/Saturation/Brightness video plugin for vlc
3  *****************************************************************************
4  * Copyright (C) 2000-2006 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Simon Latapie <garf@via.ecp.fr>
8  *          Antoine Cellerier <dionoea -at- videolan d0t org>
9  *
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23  *****************************************************************************/
24
25 /*****************************************************************************
26  * Preamble
27  *****************************************************************************/
28 #include <errno.h>
29 #include <math.h>
30
31 #ifdef HAVE_CONFIG_H
32 # include "config.h"
33 #endif
34
35 #include <vlc_common.h>
36 #include <vlc_plugin.h>
37 #include <vlc_sout.h>
38 #include <vlc_vout.h>
39
40 #include "vlc_filter.h"
41 #include "filter_picture.h"
42
43 #ifndef M_PI
44 #   define M_PI 3.14159265358979323846
45 #endif
46
47 #define eight_times( x )    x x x x x x x x
48
49 /*****************************************************************************
50  * Local prototypes
51  *****************************************************************************/
52 static int  Create    ( vlc_object_t * );
53 static void Destroy   ( vlc_object_t * );
54
55 static picture_t *FilterPlanar( filter_t *, picture_t * );
56 static picture_t *FilterPacked( filter_t *, picture_t * );
57 static int AdjustCallback( vlc_object_t *p_this, char const *psz_var,
58                            vlc_value_t oldval, vlc_value_t newval,
59                            void *p_data );
60
61 /*****************************************************************************
62  * Module descriptor
63  *****************************************************************************/
64
65 #define THRES_TEXT N_("Brightness threshold")
66 #define THRES_LONGTEXT N_("When this mode is enabled, pixels will be " \
67         "shown as black or white. The threshold value will be the brighness " \
68         "defined below." )
69 #define CONT_TEXT N_("Image contrast (0-2)")
70 #define CONT_LONGTEXT N_("Set the image contrast, between 0 and 2. Defaults to 1.")
71 #define HUE_TEXT N_("Image hue (0-360)")
72 #define HUE_LONGTEXT N_("Set the image hue, between 0 and 360. Defaults to 0.")
73 #define SAT_TEXT N_("Image saturation (0-3)")
74 #define SAT_LONGTEXT N_("Set the image saturation, between 0 and 3. Defaults to 1.")
75 #define LUM_TEXT N_("Image brightness (0-2)")
76 #define LUM_LONGTEXT N_("Set the image brightness, between 0 and 2. Defaults to 1.")
77 #define GAMMA_TEXT N_("Image gamma (0-10)")
78 #define GAMMA_LONGTEXT N_("Set the image gamma, between 0.01 and 10. Defaults to 1.")
79
80 vlc_module_begin();
81     set_description( N_("Image properties filter") );
82     set_shortname( N_("Image adjust" ));
83     set_category( CAT_VIDEO );
84     set_subcategory( SUBCAT_VIDEO_VFILTER );
85     set_capability( "video filter2", 0 );
86
87     add_float_with_range( "contrast", 1.0, 0.0, 2.0, NULL,
88                           CONT_TEXT, CONT_LONGTEXT, false );
89     add_float_with_range( "brightness", 1.0, 0.0, 2.0, NULL,
90                            LUM_TEXT, LUM_LONGTEXT, false );
91     add_integer_with_range( "hue", 0, 0, 360, NULL,
92                             HUE_TEXT, HUE_LONGTEXT, false );
93     add_float_with_range( "saturation", 1.0, 0.0, 3.0, NULL,
94                           SAT_TEXT, SAT_LONGTEXT, false );
95     add_float_with_range( "gamma", 1.0, 0.01, 10.0, NULL,
96                           GAMMA_TEXT, GAMMA_LONGTEXT, false );
97
98     add_bool( "brightness-threshold", 0, NULL,
99               THRES_TEXT, THRES_LONGTEXT, false );
100
101     add_shortcut( "adjust" );
102     set_callbacks( Create, Destroy );
103 vlc_module_end();
104
105 static const char *const ppsz_filter_options[] = {
106     "contrast", "brightness", "hue", "saturation", "gamma",
107     "brightness-threshold", NULL
108 };
109
110 /*****************************************************************************
111  * filter_sys_t: adjust filter method descriptor
112  *****************************************************************************/
113 struct filter_sys_t
114 {
115     double     f_contrast;
116     double     f_brightness;
117     int        i_hue;
118     double     f_saturation;
119     double     f_gamma;
120     bool b_brightness_threshold;
121 };
122
123 /*****************************************************************************
124  * Create: allocates adjust video filter
125  *****************************************************************************/
126 static int Create( vlc_object_t *p_this )
127 {
128     filter_t *p_filter = (filter_t *)p_this;
129     filter_sys_t *p_sys;
130
131     switch( p_filter->fmt_in.video.i_chroma )
132     {
133         CASE_PLANAR_YUV
134             /* Planar YUV */
135             p_filter->pf_video_filter = FilterPlanar;
136             break;
137
138         CASE_PACKED_YUV_422
139             /* Packed YUV 4:2:2 */
140             p_filter->pf_video_filter = FilterPacked;
141             break;
142
143         default:
144             msg_Err( p_filter, "Unsupported input chroma (%4s)",
145                      (char*)&(p_filter->fmt_in.video.i_chroma) );
146             return VLC_EGENERIC;
147     }
148
149     if( p_filter->fmt_in.video.i_chroma != p_filter->fmt_out.video.i_chroma )
150     {
151         msg_Err( p_filter, "Input and output chromas don't match" );
152         return VLC_EGENERIC;
153     }
154
155     /* Allocate structure */
156     p_filter->p_sys = malloc( sizeof( filter_sys_t ) );
157     if( p_filter->p_sys == NULL )
158         return VLC_ENOMEM;
159     p_sys = p_filter->p_sys;
160
161     /* needed to get options passed in transcode using the
162      * adjust{name=value} syntax */
163     config_ChainParse( p_filter, "", ppsz_filter_options,
164                    p_filter->p_cfg );
165
166     p_sys->f_contrast = var_CreateGetFloatCommand( p_filter, "contrast" );
167     p_sys->f_brightness = var_CreateGetFloatCommand( p_filter, "brightness" );
168     p_sys->i_hue = var_CreateGetIntegerCommand( p_filter, "hue" );
169     p_sys->f_saturation = var_CreateGetFloatCommand( p_filter, "saturation" );
170     p_sys->f_gamma = var_CreateGetFloatCommand( p_filter, "gamma" );
171     p_sys->b_brightness_threshold =
172         var_CreateGetBoolCommand( p_filter, "brightness-threshold" );
173
174     var_AddCallback( p_filter, "contrast",   AdjustCallback, p_sys );
175     var_AddCallback( p_filter, "brightness", AdjustCallback, p_sys );
176     var_AddCallback( p_filter, "hue",        AdjustCallback, p_sys );
177     var_AddCallback( p_filter, "saturation", AdjustCallback, p_sys );
178     var_AddCallback( p_filter, "gamma",      AdjustCallback, p_sys );
179     var_AddCallback( p_filter, "brightness-threshold",
180                                              AdjustCallback, p_sys );
181
182     return VLC_SUCCESS;
183 }
184
185 /*****************************************************************************
186  * Destroy: destroy adjust video filter
187  *****************************************************************************/
188 static void Destroy( vlc_object_t *p_this )
189 {
190     filter_t *p_filter = (filter_t *)p_this;
191     free( p_filter->p_sys );
192 }
193
194 /*****************************************************************************
195  * Run the filter on a Planar YUV picture
196  *****************************************************************************/
197 static picture_t *FilterPlanar( filter_t *p_filter, picture_t *p_pic )
198 {
199     int pi_luma[256];
200     int pi_gamma[256];
201
202     picture_t *p_outpic;
203     uint8_t *p_in, *p_in_v, *p_in_end, *p_line_end;
204     uint8_t *p_out, *p_out_v;
205
206     bool b_thres;
207     double  f_hue;
208     double  f_gamma;
209     int32_t i_cont, i_lum;
210     int i_sat, i_sin, i_cos, i_x, i_y;
211     int i;
212
213     filter_sys_t *p_sys = p_filter->p_sys;
214
215     if( !p_pic ) return NULL;
216
217     p_outpic = p_filter->pf_vout_buffer_new( p_filter );
218     if( !p_outpic )
219     {
220         msg_Warn( p_filter, "can't get output picture" );
221         if( p_pic->pf_release )
222             p_pic->pf_release( p_pic );
223         return NULL;
224     }
225
226     /* Getvariables */
227     i_cont = (int)( p_sys->f_contrast * 255 );
228     i_lum = (int)( (p_sys->f_brightness - 1.0)*255 );
229     f_hue = (float)( p_sys->i_hue * M_PI / 180 );
230     i_sat = (int)( p_sys->f_saturation * 256 );
231     f_gamma = 1.0 / p_sys->f_gamma;
232     b_thres = p_sys->b_brightness_threshold;
233
234     /*
235      * Threshold mode drops out everything about luma, contrast and gamma.
236      */
237     if( b_thres != true )
238     {
239
240         /* Contrast is a fast but kludged function, so I put this gap to be
241          * cleaner :) */
242         i_lum += 128 - i_cont / 2;
243
244         /* Fill the gamma lookup table */
245         for( i = 0 ; i < 256 ; i++ )
246         {
247           pi_gamma[ i ] = clip_uint8_vlc( pow(i / 255.0, f_gamma) * 255.0);
248         }
249
250         /* Fill the luma lookup table */
251         for( i = 0 ; i < 256 ; i++ )
252         {
253             pi_luma[ i ] = pi_gamma[clip_uint8_vlc( i_lum + i_cont * i / 256)];
254         }
255     }
256     else
257     {
258         /*
259          * We get luma as threshold value: the higher it is, the darker is
260          * the image. Should I reverse this?
261          */
262         for( i = 0 ; i < 256 ; i++ )
263         {
264             pi_luma[ i ] = (i < i_lum) ? 0 : 255;
265         }
266
267         /*
268          * Desaturates image to avoid that strange yellow halo...
269          */
270         i_sat = 0;
271     }
272
273     /*
274      * Do the Y plane
275      */
276
277     p_in = p_pic->p[Y_PLANE].p_pixels;
278     p_in_end = p_in + p_pic->p[Y_PLANE].i_visible_lines
279                       * p_pic->p[Y_PLANE].i_pitch - 8;
280
281     p_out = p_outpic->p[Y_PLANE].p_pixels;
282
283     for( ; p_in < p_in_end ; )
284     {
285         p_line_end = p_in + p_pic->p[Y_PLANE].i_visible_pitch - 8;
286
287         for( ; p_in < p_line_end ; )
288         {
289             /* Do 8 pixels at a time */
290             *p_out++ = pi_luma[ *p_in++ ]; *p_out++ = pi_luma[ *p_in++ ];
291             *p_out++ = pi_luma[ *p_in++ ]; *p_out++ = pi_luma[ *p_in++ ];
292             *p_out++ = pi_luma[ *p_in++ ]; *p_out++ = pi_luma[ *p_in++ ];
293             *p_out++ = pi_luma[ *p_in++ ]; *p_out++ = pi_luma[ *p_in++ ];
294         }
295
296         p_line_end += 8;
297
298         for( ; p_in < p_line_end ; )
299         {
300             *p_out++ = pi_luma[ *p_in++ ];
301         }
302
303         p_in += p_pic->p[Y_PLANE].i_pitch
304               - p_pic->p[Y_PLANE].i_visible_pitch;
305         p_out += p_outpic->p[Y_PLANE].i_pitch
306                - p_outpic->p[Y_PLANE].i_visible_pitch;
307     }
308
309     /*
310      * Do the U and V planes
311      */
312
313     p_in = p_pic->p[U_PLANE].p_pixels;
314     p_in_v = p_pic->p[V_PLANE].p_pixels;
315     p_in_end = p_in + p_pic->p[U_PLANE].i_visible_lines
316                       * p_pic->p[U_PLANE].i_pitch - 8;
317
318     p_out = p_outpic->p[U_PLANE].p_pixels;
319     p_out_v = p_outpic->p[V_PLANE].p_pixels;
320
321     i_sin = sin(f_hue) * 256;
322     i_cos = cos(f_hue) * 256;
323
324     i_x = ( cos(f_hue) + sin(f_hue) ) * 32768;
325     i_y = ( cos(f_hue) - sin(f_hue) ) * 32768;
326
327     if ( i_sat > 256 )
328     {
329 #define WRITE_UV_CLIP() \
330     i_u = *p_in++ ; i_v = *p_in_v++ ; \
331     *p_out++ = clip_uint8_vlc( (( ((i_u * i_cos + i_v * i_sin - i_x) >> 8) \
332                            * i_sat) >> 8) + 128); \
333     *p_out_v++ = clip_uint8_vlc( (( ((i_v * i_cos - i_u * i_sin - i_y) >> 8) \
334                            * i_sat) >> 8) + 128)
335
336         uint8_t i_u, i_v;
337
338         for( ; p_in < p_in_end ; )
339         {
340             p_line_end = p_in + p_pic->p[U_PLANE].i_visible_pitch - 8;
341
342             for( ; p_in < p_line_end ; )
343             {
344                 /* Do 8 pixels at a time */
345                 WRITE_UV_CLIP(); WRITE_UV_CLIP();
346                 WRITE_UV_CLIP(); WRITE_UV_CLIP();
347                 WRITE_UV_CLIP(); WRITE_UV_CLIP();
348                 WRITE_UV_CLIP(); WRITE_UV_CLIP();
349             }
350
351             p_line_end += 8;
352
353             for( ; p_in < p_line_end ; )
354             {
355                 WRITE_UV_CLIP();
356             }
357
358             p_in += p_pic->p[U_PLANE].i_pitch
359                   - p_pic->p[U_PLANE].i_visible_pitch;
360             p_in_v += p_pic->p[V_PLANE].i_pitch
361                     - p_pic->p[V_PLANE].i_visible_pitch;
362             p_out += p_outpic->p[U_PLANE].i_pitch
363                    - p_outpic->p[U_PLANE].i_visible_pitch;
364             p_out_v += p_outpic->p[V_PLANE].i_pitch
365                      - p_outpic->p[V_PLANE].i_visible_pitch;
366         }
367 #undef WRITE_UV_CLIP
368     }
369     else
370     {
371 #define WRITE_UV() \
372     i_u = *p_in++ ; i_v = *p_in_v++ ; \
373     *p_out++ = (( ((i_u * i_cos + i_v * i_sin - i_x) >> 8) \
374                        * i_sat) >> 8) + 128; \
375     *p_out_v++ = (( ((i_v * i_cos - i_u * i_sin - i_y) >> 8) \
376                        * i_sat) >> 8) + 128
377
378         uint8_t i_u, i_v;
379
380         for( ; p_in < p_in_end ; )
381         {
382             p_line_end = p_in + p_pic->p[U_PLANE].i_visible_pitch - 8;
383
384             for( ; p_in < p_line_end ; )
385             {
386                 /* Do 8 pixels at a time */
387                 WRITE_UV(); WRITE_UV(); WRITE_UV(); WRITE_UV();
388                 WRITE_UV(); WRITE_UV(); WRITE_UV(); WRITE_UV();
389             }
390
391             p_line_end += 8;
392
393             for( ; p_in < p_line_end ; )
394             {
395                 WRITE_UV();
396             }
397
398             p_in += p_pic->p[U_PLANE].i_pitch
399                   - p_pic->p[U_PLANE].i_visible_pitch;
400             p_in_v += p_pic->p[V_PLANE].i_pitch
401                     - p_pic->p[V_PLANE].i_visible_pitch;
402             p_out += p_outpic->p[U_PLANE].i_pitch
403                    - p_outpic->p[U_PLANE].i_visible_pitch;
404             p_out_v += p_outpic->p[V_PLANE].i_pitch
405                      - p_outpic->p[V_PLANE].i_visible_pitch;
406         }
407 #undef WRITE_UV
408     }
409
410     return CopyInfoAndRelease( p_outpic, p_pic );
411 }
412
413 /*****************************************************************************
414  * Run the filter on a Packed YUV picture
415  *****************************************************************************/
416 static picture_t *FilterPacked( filter_t *p_filter, picture_t *p_pic )
417 {
418     int pi_luma[256];
419     int pi_gamma[256];
420
421     picture_t *p_outpic;
422     uint8_t *p_in, *p_in_v, *p_in_end, *p_line_end;
423     uint8_t *p_out, *p_out_v;
424     int i_y_offset, i_u_offset, i_v_offset;
425
426     int i_lines, i_visible_lines, i_pitch, i_visible_pitch;
427
428     bool b_thres;
429     double  f_hue;
430     double  f_gamma;
431     int32_t i_cont, i_lum;
432     int i_sat, i_sin, i_cos, i_x, i_y;
433     int i;
434
435     filter_sys_t *p_sys = p_filter->p_sys;
436
437     if( !p_pic ) return NULL;
438
439     i_lines = p_pic->p->i_lines;
440     i_visible_lines = p_pic->p->i_visible_lines;
441     i_pitch = p_pic->p->i_pitch;
442     i_visible_pitch = p_pic->p->i_visible_pitch;
443
444     if( GetPackedYuvOffsets( p_pic->format.i_chroma, &i_y_offset,
445                              &i_u_offset, &i_v_offset ) != VLC_SUCCESS )
446     {
447         msg_Warn( p_filter, "Unsupported input chroma (%4s)",
448                   (char*)&(p_pic->format.i_chroma) );
449         if( p_pic->pf_release )
450             p_pic->pf_release( p_pic );
451         return NULL;
452     }
453
454     p_outpic = p_filter->pf_vout_buffer_new( p_filter );
455     if( !p_outpic )
456     {
457         msg_Warn( p_filter, "can't get output picture" );
458         if( p_pic->pf_release )
459             p_pic->pf_release( p_pic );
460         return NULL;
461     }
462
463     /* Getvariables */
464     i_cont = (int)( p_sys->f_contrast * 255 );
465     i_lum = (int)( (p_sys->f_brightness - 1.0)*255 );
466     f_hue = (float)( p_sys->i_hue * M_PI / 180 );
467     i_sat = (int)( p_sys->f_saturation * 256 );
468     f_gamma = 1.0 / p_sys->f_gamma;
469     b_thres = p_sys->b_brightness_threshold;
470
471     /*
472      * Threshold mode drops out everything about luma, contrast and gamma.
473      */
474     if( b_thres != true )
475     {
476
477         /* Contrast is a fast but kludged function, so I put this gap to be
478          * cleaner :) */
479         i_lum += 128 - i_cont / 2;
480
481         /* Fill the gamma lookup table */
482         for( i = 0 ; i < 256 ; i++ )
483         {
484           pi_gamma[ i ] = clip_uint8_vlc( pow(i / 255.0, f_gamma) * 255.0);
485         }
486
487         /* Fill the luma lookup table */
488         for( i = 0 ; i < 256 ; i++ )
489         {
490             pi_luma[ i ] = pi_gamma[clip_uint8_vlc( i_lum + i_cont * i / 256)];
491         }
492     }
493     else
494     {
495         /*
496          * We get luma as threshold value: the higher it is, the darker is
497          * the image. Should I reverse this?
498          */
499         for( i = 0 ; i < 256 ; i++ )
500         {
501             pi_luma[ i ] = (i < i_lum) ? 0 : 255;
502         }
503
504         /*
505          * Desaturates image to avoid that strange yellow halo...
506          */
507         i_sat = 0;
508     }
509
510     /*
511      * Do the Y plane
512      */
513
514     p_in = p_pic->p->p_pixels + i_y_offset;
515     p_in_end = p_in + p_pic->p->i_visible_lines * p_pic->p->i_pitch - 8 * 4;
516
517     p_out = p_outpic->p->p_pixels + i_y_offset;
518
519     for( ; p_in < p_in_end ; )
520     {
521         p_line_end = p_in + i_visible_pitch - 8 * 4;
522
523         for( ; p_in < p_line_end ; )
524         {
525             /* Do 8 pixels at a time */
526             *p_out = pi_luma[ *p_in ]; p_in += 2; p_out += 2;
527             *p_out = pi_luma[ *p_in ]; p_in += 2; p_out += 2;
528             *p_out = pi_luma[ *p_in ]; p_in += 2; p_out += 2;
529             *p_out = pi_luma[ *p_in ]; p_in += 2; p_out += 2;
530             *p_out = pi_luma[ *p_in ]; p_in += 2; p_out += 2;
531             *p_out = pi_luma[ *p_in ]; p_in += 2; p_out += 2;
532             *p_out = pi_luma[ *p_in ]; p_in += 2; p_out += 2;
533             *p_out = pi_luma[ *p_in ]; p_in += 2; p_out += 2;
534         }
535
536         p_line_end += 8 * 4;
537
538         for( ; p_in < p_line_end ; )
539         {
540             *p_out = pi_luma[ *p_in ]; p_in += 2; p_out += 2;
541         }
542
543         p_in += i_pitch - p_pic->p->i_visible_pitch;
544         p_out += i_pitch - p_outpic->p->i_visible_pitch;
545     }
546
547     /*
548      * Do the U and V planes
549      */
550
551     p_in = p_pic->p->p_pixels + i_u_offset;
552     p_in_v = p_pic->p->p_pixels + i_v_offset;
553     p_in_end = p_in + i_visible_lines * i_pitch - 8 * 4;
554
555     p_out = p_outpic->p->p_pixels + i_u_offset;
556     p_out_v = p_outpic->p->p_pixels + i_v_offset;
557
558     i_sin = sin(f_hue) * 256;
559     i_cos = cos(f_hue) * 256;
560
561     i_x = ( cos(f_hue) + sin(f_hue) ) * 32768;
562     i_y = ( cos(f_hue) - sin(f_hue) ) * 32768;
563
564     if ( i_sat > 256 )
565     {
566 #define WRITE_UV_CLIP() \
567     i_u = *p_in; p_in += 4; i_v = *p_in_v; p_in_v += 4; \
568     *p_out = clip_uint8_vlc( (( ((i_u * i_cos + i_v * i_sin - i_x) >> 8) \
569                            * i_sat) >> 8) + 128); \
570     p_out += 4; \
571     *p_out_v = clip_uint8_vlc( (( ((i_v * i_cos - i_u * i_sin - i_y) >> 8) \
572                            * i_sat) >> 8) + 128); \
573     p_out_v += 4
574
575         uint8_t i_u, i_v;
576
577         for( ; p_in < p_in_end ; )
578         {
579             p_line_end = p_in + i_visible_pitch - 8 * 4;
580
581             for( ; p_in < p_line_end ; )
582             {
583                 /* Do 8 pixels at a time */
584                 WRITE_UV_CLIP(); WRITE_UV_CLIP();
585                 WRITE_UV_CLIP(); WRITE_UV_CLIP();
586                 WRITE_UV_CLIP(); WRITE_UV_CLIP();
587                 WRITE_UV_CLIP(); WRITE_UV_CLIP();
588             }
589
590             p_line_end += 8 * 4;
591
592             for( ; p_in < p_line_end ; )
593             {
594                 WRITE_UV_CLIP();
595             }
596
597             p_in += i_pitch - i_visible_pitch;
598             p_in_v += i_pitch - i_visible_pitch;
599             p_out += i_pitch - i_visible_pitch;
600             p_out_v += i_pitch - i_visible_pitch;
601         }
602 #undef WRITE_UV_CLIP
603     }
604     else
605     {
606 #define WRITE_UV() \
607     i_u = *p_in; p_in += 4; i_v = *p_in_v; p_in_v += 4; \
608     *p_out = (( ((i_u * i_cos + i_v * i_sin - i_x) >> 8) \
609                        * i_sat) >> 8) + 128; \
610     p_out += 4; \
611     *p_out_v = (( ((i_v * i_cos - i_u * i_sin - i_y) >> 8) \
612                        * i_sat) >> 8) + 128; \
613     p_out_v += 4
614
615         uint8_t i_u, i_v;
616
617         for( ; p_in < p_in_end ; )
618         {
619             p_line_end = p_in + i_visible_pitch - 8 * 4;
620
621             for( ; p_in < p_line_end ; )
622             {
623                 /* Do 8 pixels at a time */
624                 WRITE_UV(); WRITE_UV(); WRITE_UV(); WRITE_UV();
625                 WRITE_UV(); WRITE_UV(); WRITE_UV(); WRITE_UV();
626             }
627
628             p_line_end += 8 * 4;
629
630             for( ; p_in < p_line_end ; )
631             {
632                 WRITE_UV();
633             }
634
635             p_in += i_pitch - i_visible_pitch;
636             p_in_v += i_pitch - i_visible_pitch;
637             p_out += i_pitch - i_visible_pitch;
638             p_out_v += i_pitch - i_visible_pitch;
639         }
640 #undef WRITE_UV
641     }
642
643     return CopyInfoAndRelease( p_outpic, p_pic );
644 }
645
646 static int AdjustCallback( vlc_object_t *p_this, char const *psz_var,
647                            vlc_value_t oldval, vlc_value_t newval,
648                            void *p_data )
649 {
650     VLC_UNUSED(p_this); VLC_UNUSED(oldval);
651     filter_sys_t *p_sys = (filter_sys_t *)p_data;
652
653     if( !strcmp( psz_var, "contrast" ) )
654         p_sys->f_contrast = newval.f_float;
655     else if( !strcmp( psz_var, "brightness" ) )
656         p_sys->f_brightness = newval.f_float;
657     else if( !strcmp( psz_var, "hue" ) )
658         p_sys->i_hue = newval.i_int;
659     else if( !strcmp( psz_var, "saturation" ) )
660         p_sys->f_saturation = newval.f_float;
661     else if( !strcmp( psz_var, "gamma" ) )
662         p_sys->f_gamma = newval.f_float;
663     else if( !strcmp( psz_var, "brightness-threshold" ) )
664         p_sys->b_brightness_threshold = newval.b_bool;
665     else
666         return VLC_EGENERIC;
667     return VLC_SUCCESS;
668 }