1 /*****************************************************************************
2 * effects.c : Effects for the visualization system
3 *****************************************************************************
4 * Copyright (C) 2002 the VideoLAN team
7 * Authors: Clément Stenac <zorglub@via.ecp.fr>
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 *****************************************************************************/
42 /*****************************************************************************
44 *****************************************************************************/
45 int dummy_Run( visual_effect_t * p_effect, aout_instance_t *p_aout,
46 aout_buffer_t * p_buffer , picture_t * p_picture)
48 VLC_UNUSED(p_effect); VLC_UNUSED(p_aout); VLC_UNUSED(p_buffer);
49 VLC_UNUSED(p_picture);
53 /*****************************************************************************
54 * spectrum_Run: spectrum analyser
55 *****************************************************************************/
56 int spectrum_Run(visual_effect_t * p_effect, aout_instance_t *p_aout,
57 aout_buffer_t * p_buffer , picture_t * p_picture)
59 float p_output[FFT_BUFFER_SIZE]; /* Raw FFT Result */
60 int *height; /* Bar heights */
61 int *peaks; /* Peaks */
62 int i_nb_bands; /* number of bands */
63 int i_band_width; /* width of bands */
64 int i_separ; /* Should we let blanks ? */
65 int i_amp; /* Vertical amplification */
66 int i_peak; /* Should we draw peaks ? */
67 char *psz_parse = NULL; /* Args line */
69 /* Horizontal scale for 20-band equalizer */
70 const int xscale1[]={0,1,2,3,4,5,6,7,8,11,15,20,27,
71 36,47,62,82,107,141,184,255};
73 /* Horizontal scale for 80-band equalizer */
75 {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,
76 19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,
77 35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,
78 52,53,54,55,56,57,58,59,61,63,67,72,77,82,87,93,99,105,
79 110,115,121,130,141,152,163,174,185,200,255};
81 const double y_scale = 3.60673760222; /* (log 256) */
83 fft_state *p_state; /* internal FFT data */
87 int16_t p_dest[FFT_BUFFER_SIZE]; /* Adapted FFT result */
88 int16_t p_buffer1[FFT_BUFFER_SIZE]; /* Buffer on which we perform
89 the FFT (first channel) */
91 float *p_buffl = /* Original buffer */
92 (float*)p_buffer->p_buffer;
94 int16_t *p_buffs; /* int16_t converted buffer */
95 int16_t *p_s16_buff = NULL; /* int16_t converted buffer */
97 p_s16_buff = (int16_t*)malloc(
98 p_buffer->i_nb_samples * p_effect->i_nb_chans * sizeof(int16_t));
102 msg_Err(p_aout,"out of memory");
106 p_buffs = p_s16_buff;
107 i_nb_bands = config_GetInt ( p_aout, "visual-nbbands" );
108 i_separ = config_GetInt( p_aout, "visual-separ" );
109 i_amp = config_GetInt ( p_aout, "visual-amp" );
110 i_peak = config_GetInt ( p_aout, "visual-peaks" );
112 if( i_nb_bands == 20)
122 if( !p_effect->p_data )
124 p_effect->p_data=(void *)malloc(i_nb_bands * sizeof(int) );
125 if( !p_effect->p_data)
127 msg_Err(p_aout,"out of memory");
130 peaks = (int *)p_effect->p_data;
131 for( i = 0 ; i < i_nb_bands ; i++)
139 peaks =(int *)p_effect->p_data;
143 height = (int *)malloc( i_nb_bands * sizeof(int) );
146 msg_Err(p_aout,"out of memory");
149 /* Convert the buffer to int16_t */
150 /* Pasted from float32tos16.c */
151 for (i = p_buffer->i_nb_samples * p_effect->i_nb_chans; i--; )
153 union { float f; int32_t i; } u;
154 u.f = *p_buffl + 384.0;
155 if(u.i > 0x43c07fff ) * p_buffs = 32767;
156 else if ( u.i < 0x43bf8000 ) *p_buffs = -32768;
157 else *p_buffs = u.i - 0x43c00000;
159 p_buffl++ ; p_buffs++ ;
161 p_state = visual_fft_init();
164 msg_Err(p_aout,"unable to initialize FFT transform");
167 p_buffs = p_s16_buff;
168 for ( i = 0 ; i < FFT_BUFFER_SIZE ; i++)
171 p_buffer1[i] = *p_buffs;
172 p_buffs = p_buffs + p_effect->i_nb_chans;
174 fft_perform( p_buffer1, p_output, p_state);
175 for(i= 0; i< FFT_BUFFER_SIZE ; i++ )
176 p_dest[i] = ( (int) sqrt( p_output [ i + 1 ] ) ) >> 8;
178 for ( i = 0 ; i< i_nb_bands ;i++)
180 /* We search the maximum on one scale */
181 for( j = xscale[i] , y=0 ; j< xscale[ i + 1 ] ; j++ )
186 /* Calculate the height of the bar */
187 y >>=7;/* remove some noise */
190 height[i] = (int)log(y)* y_scale;
199 /* Draw the bar now */
200 i_band_width = floor( p_effect->i_width / i_nb_bands) ;
202 if( i_amp * height[i] > peaks[i])
204 peaks[i] = i_amp * height[i];
206 else if (peaks[i] > 0 )
208 peaks[i] -= PEAK_SPEED;
209 if( peaks[i] < i_amp * height[i] )
211 peaks[i] = i_amp * height[i];
219 if( peaks[i] > 0 && i_peak )
221 if( peaks[i] >= p_effect->i_height )
222 peaks[i] = p_effect->i_height - 2;
225 for( j = 0 ; j< i_band_width - i_separ; j++)
227 for( k = 0 ; k< 3 ; k ++)
230 *(p_picture->p[0].p_pixels +
231 (p_picture->p[0].i_lines - i_line -1 -k ) *
232 p_picture->p[0].i_pitch + (i_band_width*i +j) )
235 *(p_picture->p[1].p_pixels +
236 (p_picture->p[1].i_lines - i_line /2 -1 -k/2 ) *
237 p_picture->p[1].i_pitch +
238 ( ( i_band_width * i + j ) /2 ) )
241 if( 0x04 * (i_line + k ) - 0x0f > 0 )
243 if ( 0x04 * (i_line + k ) -0x0f < 0xff)
244 *(p_picture->p[2].p_pixels +
245 (p_picture->p[2].i_lines - i_line /2 - 1 -k/2 ) *
246 p_picture->p[2].i_pitch +
247 ( ( i_band_width * i + j ) /2 ) )
248 = ( 0x04 * ( i_line + k ) ) -0x0f ;
250 *(p_picture->p[2].p_pixels +
251 (p_picture->p[2].i_lines - i_line /2 - 1 -k/2 ) *
252 p_picture->p[2].i_pitch +
253 ( ( i_band_width * i + j ) /2 ) )
258 *(p_picture->p[2].p_pixels +
259 (p_picture->p[2].i_lines - i_line /2 - 1 -k/2 ) *
260 p_picture->p[2].i_pitch +
261 ( ( i_band_width * i + j ) /2 ) )
268 if(height[i] * i_amp > p_effect->i_height)
269 height[i] = floor(p_effect->i_height / i_amp );
271 for(i_line = 0 ; i_line < i_amp * height[i]; i_line ++ )
273 for( j = 0 ; j< i_band_width - i_separ ; j++)
275 *(p_picture->p[0].p_pixels +
276 (p_picture->p[0].i_lines - i_line -1) *
277 p_picture->p[0].i_pitch + (i_band_width*i +j) ) = 0xff;
279 *(p_picture->p[1].p_pixels +
280 (p_picture->p[1].i_lines - i_line /2 -1) *
281 p_picture->p[1].i_pitch +
282 ( ( i_band_width * i + j ) /2 ) ) = 0x00;
284 if( 0x04 * i_line - 0x0f > 0 )
286 if( 0x04 * i_line - 0x0f < 0xff )
287 *(p_picture->p[2].p_pixels +
288 (p_picture->p[2].i_lines - i_line /2 - 1) *
289 p_picture->p[2].i_pitch +
290 ( ( i_band_width * i + j ) /2 ) ) =
291 ( 0x04 * i_line) -0x0f ;
293 *(p_picture->p[2].p_pixels +
294 (p_picture->p[2].i_lines - i_line /2 - 1) *
295 p_picture->p[2].i_pitch +
296 ( ( i_band_width * i + j ) /2 ) ) =
301 *(p_picture->p[2].p_pixels +
302 (p_picture->p[2].i_lines - i_line /2 - 1) *
303 p_picture->p[2].i_pitch +
304 ( ( i_band_width * i + j ) /2 ) ) =
311 fft_close( p_state );
323 /*****************************************************************************
324 * spectrometer_Run: derivative spectrum analysis
325 *****************************************************************************/
326 int spectrometer_Run(visual_effect_t * p_effect, aout_instance_t *p_aout,
327 aout_buffer_t * p_buffer , picture_t * p_picture)
329 #define Y(R,G,B) ((uint8_t)( (R * .299) + (G * .587) + (B * .114) ))
330 #define U(R,G,B) ((uint8_t)( (R * -.169) + (G * -.332) + (B * .500) + 128 ))
331 #define V(R,G,B) ((uint8_t)( (R * .500) + (G * -.419) + (B * -.0813) + 128 ))
332 float p_output[FFT_BUFFER_SIZE]; /* Raw FFT Result */
333 int *height; /* Bar heights */
334 int *peaks; /* Peaks */
335 int i_nb_bands; /* number of bands */
336 int i_band_width; /* width of bands */
337 int i_separ; /* Should we let blanks ? */
338 int i_amp; /* Vertical amplification */
339 int i_peak; /* Should we draw peaks ? */
341 int i_original; /* original spectrum graphic routine */
342 int i_rad; /* radius of circle of base of bands */
343 int i_sections; /* sections of spectranalysis */
344 int i_extra_width; /* extra width on peak */
345 int i_peak_height; /* height of peak */
346 int c; /* sentinel container of total spectral sections */
347 double band_sep_angle; /* angled separation between beginning of each band */
348 double section_sep_angle;/* " " ' " ' " " spectrum section */
349 int max_band_length; /* try not to go out of screen */
350 int i_show_base; /* Should we draw base of circle ? */
351 int i_show_bands; /* Should we draw bands ? */
352 //int i_invert_bands; /* do the bands point inward ? */
353 double a; /* for various misc angle situations in radians */
354 int x,y,xx,yy; /* various misc x/y */
355 char color1; /* V slide on a YUV color cube */
356 //char color2; /* U slide.. ? color2 fade color ? */
358 char *psz_parse = NULL; /* Args line */
360 /* Horizontal scale for 20-band equalizer */
361 const int xscale1[]={0,1,2,3,4,5,6,7,8,11,15,20,27,
362 36,47,62,82,107,141,184,255};
364 /* Horizontal scale for 80-band equalizer */
365 const int xscale2[] =
366 {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,
367 19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,
368 35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,
369 52,53,54,55,56,57,58,59,61,63,67,72,77,82,87,93,99,105,
370 110,115,121,130,141,152,163,174,185,200,255};
372 const double y_scale = 3.60673760222; /* (log 256) */
374 fft_state *p_state; /* internal FFT data */
378 int16_t p_dest[FFT_BUFFER_SIZE]; /* Adapted FFT result */
379 int16_t p_buffer1[FFT_BUFFER_SIZE]; /* Buffer on which we perform
380 the FFT (first channel) */
381 float *p_buffl = /* Original buffer */
382 (float*)p_buffer->p_buffer;
384 int16_t *p_buffs; /* int16_t converted buffer */
385 int16_t *p_s16_buff = NULL; /* int16_t converted buffer */
389 p_s16_buff = (int16_t*)malloc(
390 p_buffer->i_nb_samples * p_effect->i_nb_chans * sizeof(int16_t));
394 msg_Err(p_aout,"out of memory");
398 p_buffs = p_s16_buff;
399 i_original = config_GetInt ( p_aout, "spect-show-original" );
400 i_nb_bands = config_GetInt ( p_aout, "spect-nbbands" );
401 i_separ = config_GetInt ( p_aout, "spect-separ" );
402 i_amp = config_GetInt ( p_aout, "spect-amp" );
403 i_peak = config_GetInt ( p_aout, "spect-show-peaks" );
404 i_show_base = config_GetInt ( p_aout, "spect-show-base" );
405 i_show_bands = config_GetInt ( p_aout, "spect-show-bands" );
406 i_rad = config_GetInt ( p_aout, "spect-radius" );
407 i_sections = config_GetInt ( p_aout, "spect-sections" );
408 i_extra_width = config_GetInt ( p_aout, "spect-peak-width" );
409 i_peak_height = config_GetInt ( p_aout, "spect-peak-height" );
410 color1 = config_GetInt ( p_aout, "spect-color" );
412 if( i_nb_bands == 20)
418 if( i_nb_bands > 80 )
423 if( !p_effect->p_data )
425 p_effect->p_data=(void *)malloc(i_nb_bands * sizeof(int) );
426 if( !p_effect->p_data)
428 msg_Err(p_aout,"out of memory");
431 peaks = (int *)p_effect->p_data;
432 for( i = 0 ; i < i_nb_bands ; i++)
439 peaks =(int *)p_effect->p_data;
442 height = (int *)malloc( i_nb_bands * sizeof(int) );
445 msg_Err(p_aout,"out of memory");
449 /* Convert the buffer to int16_t */
450 /* Pasted from float32tos16.c */
451 for (i = p_buffer->i_nb_samples * p_effect->i_nb_chans; i--; )
453 union { float f; int32_t i; } u;
454 u.f = *p_buffl + 384.0;
455 if(u.i > 0x43c07fff ) * p_buffs = 32767;
456 else if ( u.i < 0x43bf8000 ) *p_buffs = -32768;
457 else *p_buffs = u.i - 0x43c00000;
459 p_buffl++ ; p_buffs++ ;
461 p_state = visual_fft_init();
464 msg_Err(p_aout,"unable to initialize FFT transform");
467 p_buffs = p_s16_buff;
468 for ( i = 0 ; i < FFT_BUFFER_SIZE ; i++)
471 p_buffer1[i] = *p_buffs;
472 p_buffs = p_buffs + p_effect->i_nb_chans;
474 fft_perform( p_buffer1, p_output, p_state);
475 for(i= 0; i< FFT_BUFFER_SIZE ; i++ )
476 p_dest[i] = ( (int) sqrt( p_output [ i + 1 ] ) ) >> 8;
478 i_nb_bands *= i_sections;
480 for ( i = 0 ; i< i_nb_bands/i_sections ;i++)
482 /* We search the maximum on one scale */
483 for( j = xscale[i] , y=0 ; j< xscale[ i + 1 ] ; j++ )
488 /* Calculate the height of the bar */
489 y >>=7;/* remove some noise */
492 height[i] = (int)log(y)* y_scale;
501 /* Draw the bar now */
502 i_band_width = floor( p_effect->i_width / (i_nb_bands/i_sections)) ;
504 if( i_amp * height[i] > peaks[i])
506 peaks[i] = i_amp * height[i];
508 else if (peaks[i] > 0 )
510 peaks[i] -= PEAK_SPEED;
511 if( peaks[i] < i_amp * height[i] )
513 peaks[i] = i_amp * height[i];
521 if( i_original != 0 )
523 if( peaks[i] > 0 && i_peak )
525 if( peaks[i] >= p_effect->i_height )
526 peaks[i] = p_effect->i_height - 2;
529 for( j = 0 ; j< i_band_width - i_separ; j++)
531 for( k = 0 ; k< 3 ; k ++)
534 *(p_picture->p[0].p_pixels +
535 (p_picture->p[0].i_lines - i_line -1 -k ) *
536 p_picture->p[0].i_pitch + (i_band_width*i +j) )
539 *(p_picture->p[1].p_pixels +
540 (p_picture->p[1].i_lines - i_line /2 -1 -k/2 ) *
541 p_picture->p[1].i_pitch +
542 ( ( i_band_width * i + j ) /2 ) )
545 if( 0x04 * (i_line + k ) - 0x0f > 0 )
547 if ( 0x04 * (i_line + k ) -0x0f < 0xff)
548 *(p_picture->p[2].p_pixels +
549 (p_picture->p[2].i_lines - i_line /2 - 1 -k/2 ) *
550 p_picture->p[2].i_pitch +
551 ( ( i_band_width * i + j ) /2 ) )
552 = ( 0x04 * ( i_line + k ) ) -0x0f ;
554 *(p_picture->p[2].p_pixels +
555 (p_picture->p[2].i_lines - i_line /2 - 1 -k/2 ) *
556 p_picture->p[2].i_pitch +
557 ( ( i_band_width * i + j ) /2 ) )
562 *(p_picture->p[2].p_pixels +
563 (p_picture->p[2].i_lines - i_line /2 - 1 -k/2 ) *
564 p_picture->p[2].i_pitch +
565 ( ( i_band_width * i + j ) /2 ) )
571 if(height[i] * i_amp > p_effect->i_height)
572 height[i] = floor(p_effect->i_height / i_amp );
574 for(i_line = 0 ; i_line < i_amp * height[i]; i_line ++ )
576 for( j = 0 ; j< i_band_width - i_separ ; j++)
578 *(p_picture->p[0].p_pixels +
579 (p_picture->p[0].i_lines - i_line -1) *
580 p_picture->p[0].i_pitch + (i_band_width*i +j) ) = 0xff;
582 *(p_picture->p[1].p_pixels +
583 (p_picture->p[1].i_lines - i_line /2 -1) *
584 p_picture->p[1].i_pitch +
585 ( ( i_band_width * i + j ) /2 ) ) = 0x00;
587 if( 0x04 * i_line - 0x0f > 0 )
589 if( 0x04 * i_line - 0x0f < 0xff )
590 *(p_picture->p[2].p_pixels +
591 (p_picture->p[2].i_lines - i_line /2 - 1) *
592 p_picture->p[2].i_pitch +
593 ( ( i_band_width * i + j ) /2 ) ) =
594 ( 0x04 * i_line) -0x0f ;
596 *(p_picture->p[2].p_pixels +
597 (p_picture->p[2].i_lines - i_line /2 - 1) *
598 p_picture->p[2].i_pitch +
599 ( ( i_band_width * i + j ) /2 ) ) =
604 *(p_picture->p[2].p_pixels +
605 (p_picture->p[2].i_lines - i_line /2 - 1) *
606 p_picture->p[2].i_pitch +
607 ( ( i_band_width * i + j ) /2 ) ) =
615 band_sep_angle = 360.0 / i_nb_bands;
616 section_sep_angle = 360.0 / i_sections;
617 if( i_peak_height < 1 )
619 max_band_length = p_picture->p[0].i_lines / 2 - ( i_rad + i_peak_height + 1 );
621 i_band_width = floor( 360 / i_nb_bands - i_separ );
622 if( i_band_width < 1 )
625 for( c = 0 ; c < i_sections ; c++ )
626 for( i = 0 ; i < (i_nb_bands / i_sections) ; i++ )
629 if( peaks[i] > 0 && i_peak )
631 if( peaks[i] >= p_effect->i_height )
632 peaks[i] = p_effect->i_height - 2;
635 /* circular line pattern(so color blend is more visible) */
636 for( j = 0 ; j < i_peak_height ; j++ )
638 x = p_picture->p[0].i_pitch / 2;
639 y = p_picture->p[0].i_lines / 2;
642 for( k = 0 ; k < (i_band_width + i_extra_width) ; k++ )
646 a = ( (i+1) * band_sep_angle + section_sep_angle * (c+1) + k )
648 x += (double)( cos(a) * (double)( i_line + j + i_rad ) );
649 y += (double)( -sin(a) * (double)( i_line + j + i_rad ) );
651 *(p_picture->p[0].p_pixels + x + y * p_picture->p[0].i_pitch
652 ) = 255;/* Y(R,G,B); */
657 *(p_picture->p[1].p_pixels + x + y * p_picture->p[1].i_pitch
658 ) = 0;/* U(R,G,B); */
660 if( 0x04 * (i_line + k ) - 0x0f > 0 )
662 if ( 0x04 * (i_line + k ) -0x0f < 0xff)
663 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
664 ) = ( 0x04 * ( i_line + k ) ) -(color1-1);/* -V(R,G,B); */
666 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
667 ) = 255;/* V(R,G,B); */
671 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
672 ) = color1;/* V(R,G,B); */
678 if( (height[i] * i_amp) > p_effect->i_height )
679 height[i] = floor( p_effect->i_height / i_amp );
681 /* DO BASE OF BAND (mostly makes a circle) */
682 if( i_show_base != 0 )
684 x = p_picture->p[0].i_pitch / 2;
685 y = p_picture->p[0].i_lines / 2;
687 a = ( (i+1) * band_sep_angle + section_sep_angle * (c+1) )
689 x += (double)( cos(a) * (double)i_rad );/* newb-forceful casting */
690 y += (double)( -sin(a) * (double)i_rad );
692 *(p_picture->p[0].p_pixels + x + y * p_picture->p[0].i_pitch
693 ) = 255;/* Y(R,G,B); */
698 *(p_picture->p[1].p_pixels + x + y * p_picture->p[1].i_pitch
699 ) = 0;/* U(R,G,B); */
701 if( 0x04 * i_line - 0x0f > 0 )
703 if( 0x04 * i_line -0x0f < 0xff)
704 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
705 ) = ( 0x04 * i_line) -(color1-1);/* -V(R,G,B); */
707 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
708 ) = 255;/* V(R,G,B); */
712 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
713 ) = color1;/* V(R,G,B); */
718 if( i_show_bands != 0 )
719 for( j = 0 ; j < i_band_width ; j++ )
721 x = p_picture->p[0].i_pitch / 2;
722 y = p_picture->p[0].i_lines / 2;
725 a = ( (i+1) * band_sep_angle + section_sep_angle * (c+1) + j )
728 for( k = (i_rad+1) ; k < max_band_length ; k++ )
730 if( (k-i_rad) > height[i] )
735 x += (double)( cos(a) * (double)k );/* newbed! */
736 y += (double)( -sin(a) * (double)k );
738 *(p_picture->p[0].p_pixels + x + y * p_picture->p[0].i_pitch
744 *(p_picture->p[1].p_pixels + x + y * p_picture->p[1].i_pitch
747 if( 0x04 * i_line - 0x0f > 0 )
749 if ( 0x04 * i_line -0x0f < 0xff)
750 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
751 ) = ( 0x04 * i_line) -(color1-1);
753 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
758 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
765 fft_close( p_state );
777 /*****************************************************************************
778 * scope_Run: scope effect
779 *****************************************************************************/
780 int scope_Run(visual_effect_t * p_effect, aout_instance_t *p_aout,
781 aout_buffer_t * p_buffer , picture_t * p_picture)
786 uint8_t *ppp_area[2][3];
789 for( i_index = 0 ; i_index < 2 ; i_index++ )
792 for( j = 0 ; j < 3 ; j++ )
794 ppp_area[i_index][j] =
795 p_picture->p[j].p_pixels + i_index * p_picture->p[j].i_lines
796 / 2 * p_picture->p[j].i_pitch;
800 for( i_index = 0, p_sample = (float *)p_buffer->p_buffer;
801 i_index < p_effect->i_width;
807 i_value = (*p_sample++ +1) * 127;
809 + p_picture->p[0].i_pitch * i_index / p_effect->i_width
810 + p_picture->p[0].i_lines * i_value / 512
811 * p_picture->p[0].i_pitch) = 0xbf;
813 + p_picture->p[1].i_pitch * i_index / p_effect->i_width
814 + p_picture->p[1].i_lines * i_value / 512
815 * p_picture->p[1].i_pitch) = 0xff;
819 i_value = ( *p_sample++ +1 ) * 127;
821 + p_picture->p[0].i_pitch * i_index / p_effect->i_width
822 + p_picture->p[0].i_lines * i_value / 512
823 * p_picture->p[0].i_pitch) = 0x9f;
825 + p_picture->p[2].i_pitch * i_index / p_effect->i_width
826 + p_picture->p[2].i_lines * i_value / 512
827 * p_picture->p[2].i_pitch) = 0xdd;