1 /*****************************************************************************
2 * effects.c : Effects for the visualization system
3 *****************************************************************************
4 * Copyright (C) 2002-2009 the VideoLAN team
7 * Authors: Clément Stenac <zorglub@via.ecp.fr>
8 * Adrien Maglo <magsoft@videolan.org>
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.
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.
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 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
32 #include <vlc_common.h>
42 #define BAR_DECREASE_SPEED 5
44 #define GRAD_ANGLE_MIN 0.2
45 #define GRAD_ANGLE_MAX 0.5
46 #define GRAD_INCR 0.01
48 /*****************************************************************************
50 *****************************************************************************/
51 int dummy_Run( visual_effect_t * p_effect, vlc_object_t *p_aout,
52 const block_t * p_buffer , picture_t * p_picture)
54 VLC_UNUSED(p_effect); VLC_UNUSED(p_aout); VLC_UNUSED(p_buffer);
55 VLC_UNUSED(p_picture);
59 /*****************************************************************************
60 * spectrum_Run: spectrum analyser
61 *****************************************************************************/
62 int spectrum_Run(visual_effect_t * p_effect, vlc_object_t *p_aout,
63 const block_t * p_buffer , picture_t * p_picture)
65 spectrum_data *p_data = p_effect->p_data;
66 float p_output[FFT_BUFFER_SIZE]; /* Raw FFT Result */
67 int *height; /* Bar heights */
68 int *peaks; /* Peaks */
69 int *prev_heights; /* Previous bar heights */
70 int i_80_bands; /* number of bands : 80 if true else 20 */
71 int i_nb_bands; /* number of bands : 80 or 20 */
72 int i_band_width; /* width of bands */
73 int i_start; /* first band horizontal position */
74 int i_peak; /* Should we draw peaks ? */
76 /* Horizontal scale for 20-band equalizer */
77 const int xscale1[]={0,1,2,3,4,5,6,7,8,11,15,20,27,
78 36,47,62,82,107,141,184,255};
80 /* Horizontal scale for 80-band equalizer */
82 {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,
83 19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,
84 35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,
85 52,53,54,55,56,57,58,59,61,63,67,72,77,82,87,93,99,105,
86 110,115,121,130,141,152,163,174,185,200,255};
89 fft_state *p_state; /* internal FFT data */
93 int16_t p_dest[FFT_BUFFER_SIZE]; /* Adapted FFT result */
94 int16_t p_buffer1[FFT_BUFFER_SIZE]; /* Buffer on which we perform
95 the FFT (first channel) */
97 float *p_buffl = /* Original buffer */
98 (float*)p_buffer->p_buffer;
100 int16_t *p_buffs; /* int16_t converted buffer */
101 int16_t *p_s16_buff; /* int16_t converted buffer */
103 p_s16_buff = malloc( p_buffer->i_nb_samples * p_effect->i_nb_chans * sizeof(int16_t));
107 p_buffs = p_s16_buff;
108 i_80_bands = config_GetInt ( p_aout, "visual-80-bands" );
109 i_peak = config_GetInt ( p_aout, "visual-peaks" );
124 p_effect->p_data = p_data = malloc( sizeof( spectrum_data ) );
131 p_data->peaks = calloc( 80, sizeof(int) );
132 p_data->prev_heights = calloc( 80, sizeof(int) );
134 peaks = (int *)p_data->peaks;
135 prev_heights = (int *)p_data->prev_heights;
138 height = malloc( i_nb_bands * sizeof(int) );
144 /* Convert the buffer to int16_t */
145 /* Pasted from float32tos16.c */
146 for (i = p_buffer->i_nb_samples * p_effect->i_nb_chans; i--; )
148 union { float f; int32_t i; } u;
149 u.f = *p_buffl + 384.0;
150 if(u.i > 0x43c07fff ) * p_buffs = 32767;
151 else if ( u.i < 0x43bf8000 ) *p_buffs = -32768;
152 else *p_buffs = u.i - 0x43c00000;
154 p_buffl++ ; p_buffs++ ;
156 p_state = visual_fft_init();
161 msg_Err(p_aout,"unable to initialize FFT transform");
164 p_buffs = p_s16_buff;
165 for ( i = 0 ; i < FFT_BUFFER_SIZE ; i++)
168 p_buffer1[i] = *p_buffs;
170 p_buffs += p_effect->i_nb_chans;
171 if( p_buffs >= &p_s16_buff[p_buffer->i_nb_samples * p_effect->i_nb_chans] )
172 p_buffs = p_s16_buff;
175 fft_perform( p_buffer1, p_output, p_state);
176 for( i = 0; i< FFT_BUFFER_SIZE ; i++ )
177 p_dest[i] = p_output[i] * ( 2 ^ 16 ) / ( ( FFT_BUFFER_SIZE / 2 * 32768 ) ^ 2 );
179 /* Compute the horizontal position of the first band */
180 i_band_width = floor( p_effect->i_width / i_nb_bands);
181 i_start = ( p_effect->i_width - i_band_width * i_nb_bands ) / 2;
183 for ( i = 0 ; i < i_nb_bands ;i++)
185 /* We search the maximum on one scale */
186 for( j = xscale[i], y = 0; j< xscale[ i + 1 ]; j++ )
191 /* Calculate the height of the bar */
194 height[i] = log( y ) * 30;
195 if( height[i] > 380 )
201 /* Draw the bar now */
203 if( height[i] > peaks[i] )
205 peaks[i] = height[i];
207 else if( peaks[i] > 0 )
209 peaks[i] -= PEAK_SPEED;
210 if( peaks[i] < height[i] )
212 peaks[i] = height[i];
220 /* Decrease the bars if needed */
221 if( height[i] <= prev_heights[i] - BAR_DECREASE_SPEED )
223 height[i] = prev_heights[i];
224 height[i] -= BAR_DECREASE_SPEED;
226 prev_heights[i] = height[i];
228 if( peaks[i] > 0 && i_peak )
230 if( peaks[i] >= p_effect->i_height )
231 peaks[i] = p_effect->i_height - 2;
234 for( j = 0; j < i_band_width - 1; j++ )
236 for( k = 0; k < 3; k ++ )
239 *(p_picture->p[0].p_pixels +
240 ( p_effect->i_height - i_line -1 -k ) *
241 p_picture->p[0].i_pitch +
242 ( i_start + i_band_width*i + j ) )
245 *(p_picture->p[1].p_pixels +
246 ( ( p_effect->i_height - i_line ) / 2 - 1 -k/2 ) *
247 p_picture->p[1].i_pitch +
248 ( ( i_start + i_band_width * i + j ) /2 ) )
251 if( i_line + k - 0x0f > 0 )
253 if ( i_line + k - 0x0f < 0xff )
254 *(p_picture->p[2].p_pixels +
255 ( ( p_effect->i_height - i_line ) / 2 - 1 -k/2 ) *
256 p_picture->p[2].i_pitch +
257 ( ( i_start + i_band_width * i + j ) /2 ) )
258 = ( i_line + k ) - 0x0f;
260 *(p_picture->p[2].p_pixels +
261 ( ( p_effect->i_height - i_line ) / 2 - 1 -k/2 ) *
262 p_picture->p[2].i_pitch +
263 ( ( i_start + i_band_width * i + j ) /2 ) )
268 *(p_picture->p[2].p_pixels +
269 ( ( p_effect->i_height - i_line ) / 2 - 1 -k/2 ) *
270 p_picture->p[2].i_pitch +
271 ( ( i_start + i_band_width * i + j ) /2 ) )
278 if(height[i] > p_effect->i_height)
279 height[i] = floor(p_effect->i_height );
281 for( i_line = 0; i_line < height[i]; i_line++ )
283 for( j = 0 ; j < i_band_width - 1; j++)
285 *(p_picture->p[0].p_pixels +
286 (p_effect->i_height - i_line - 1) *
287 p_picture->p[0].i_pitch +
288 ( i_start + i_band_width*i + j ) ) = 0xff;
290 *(p_picture->p[1].p_pixels +
291 ( ( p_effect->i_height - i_line ) / 2 - 1) *
292 p_picture->p[1].i_pitch +
293 ( ( i_start + i_band_width * i + j ) /2 ) ) = 0x00;
295 if( i_line - 0x0f > 0 )
297 if( i_line - 0x0f < 0xff )
298 *(p_picture->p[2].p_pixels +
299 ( ( p_effect->i_height - i_line ) / 2 - 1) *
300 p_picture->p[2].i_pitch +
301 ( ( i_start + i_band_width * i + j ) /2 ) ) =
304 *(p_picture->p[2].p_pixels +
305 ( ( p_effect->i_height - i_line ) / 2 - 1) *
306 p_picture->p[2].i_pitch +
307 ( ( i_start + i_band_width * i + j ) /2 ) ) =
312 *(p_picture->p[2].p_pixels +
313 ( ( p_effect->i_height - i_line ) / 2 - 1) *
314 p_picture->p[2].i_pitch +
315 ( ( i_start + i_band_width * i + j ) /2 ) ) =
322 fft_close( p_state );
331 /*****************************************************************************
332 * spectrometer_Run: derivative spectrum analysis
333 *****************************************************************************/
334 int spectrometer_Run(visual_effect_t * p_effect, vlc_object_t *p_aout,
335 const block_t * p_buffer , picture_t * p_picture)
337 #define Y(R,G,B) ((uint8_t)( (R * .299) + (G * .587) + (B * .114) ))
338 #define U(R,G,B) ((uint8_t)( (R * -.169) + (G * -.332) + (B * .500) + 128 ))
339 #define V(R,G,B) ((uint8_t)( (R * .500) + (G * -.419) + (B * -.0813) + 128 ))
340 float p_output[FFT_BUFFER_SIZE]; /* Raw FFT Result */
341 int *height; /* Bar heights */
342 int *peaks; /* Peaks */
343 int i_80_bands; /* number of bands : 80 if true else 20 */
344 int i_nb_bands; /* number of bands : 80 or 20 */
345 int i_band_width; /* width of bands */
346 int i_separ; /* Should we let blanks ? */
347 int i_amp; /* Vertical amplification */
348 int i_peak; /* Should we draw peaks ? */
350 int i_original; /* original spectrum graphic routine */
351 int i_rad; /* radius of circle of base of bands */
352 int i_sections; /* sections of spectranalysis */
353 int i_extra_width; /* extra width on peak */
354 int i_peak_height; /* height of peak */
355 int c; /* sentinel container of total spectral sections */
356 double band_sep_angle; /* angled separation between beginning of each band */
357 double section_sep_angle;/* " " ' " ' " " spectrum section */
358 int max_band_length; /* try not to go out of screen */
359 int i_show_base; /* Should we draw base of circle ? */
360 int i_show_bands; /* Should we draw bands ? */
361 //int i_invert_bands; /* do the bands point inward ? */
362 double a; /* for various misc angle situations in radians */
363 int x,y,xx,yy; /* various misc x/y */
364 char color1; /* V slide on a YUV color cube */
365 //char color2; /* U slide.. ? color2 fade color ? */
367 /* Horizontal scale for 20-band equalizer */
368 const int xscale1[]={0,1,2,3,4,5,6,7,8,11,15,20,27,
369 36,47,62,82,107,141,184,255};
371 /* Horizontal scale for 80-band equalizer */
372 const int xscale2[] =
373 {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,
374 19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,
375 35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,
376 52,53,54,55,56,57,58,59,61,63,67,72,77,82,87,93,99,105,
377 110,115,121,130,141,152,163,174,185,200,255};
379 const double y_scale = 3.60673760222; /* (log 256) */
381 fft_state *p_state; /* internal FFT data */
385 int16_t p_dest[FFT_BUFFER_SIZE]; /* Adapted FFT result */
386 int16_t p_buffer1[FFT_BUFFER_SIZE]; /* Buffer on which we perform
387 the FFT (first channel) */
388 float *p_buffl = /* Original buffer */
389 (float*)p_buffer->p_buffer;
391 int16_t *p_buffs; /* int16_t converted buffer */
392 int16_t *p_s16_buff; /* int16_t converted buffer */
396 p_s16_buff = malloc( p_buffer->i_nb_samples * p_effect->i_nb_chans * sizeof(int16_t) );
400 p_buffs = p_s16_buff;
401 i_original = config_GetInt ( p_aout, "spect-show-original" );
402 i_80_bands = config_GetInt ( p_aout, "spect-80-bands" );
403 i_separ = config_GetInt ( p_aout, "spect-separ" );
404 i_amp = config_GetInt ( p_aout, "spect-amp" );
405 i_peak = config_GetInt ( p_aout, "spect-show-peaks" );
406 i_show_base = config_GetInt ( p_aout, "spect-show-base" );
407 i_show_bands = config_GetInt ( p_aout, "spect-show-bands" );
408 i_rad = config_GetInt ( p_aout, "spect-radius" );
409 i_sections = config_GetInt ( p_aout, "spect-sections" );
410 i_extra_width = config_GetInt ( p_aout, "spect-peak-width" );
411 i_peak_height = config_GetInt ( p_aout, "spect-peak-height" );
412 color1 = config_GetInt ( p_aout, "spect-color" );
425 if( !p_effect->p_data )
427 p_effect->p_data=(void *)malloc( 80 * sizeof(int) );
428 if( !p_effect->p_data )
433 peaks = (int *)p_effect->p_data;
434 for( i = 0 ; i < i_nb_bands ; i++ )
441 peaks =(int *)p_effect->p_data;
444 height = (int *)malloc( i_nb_bands * sizeof(int) );
447 free( p_effect->p_data );
452 /* Convert the buffer to int16_t */
453 /* Pasted from float32tos16.c */
454 for (i = p_buffer->i_nb_samples * p_effect->i_nb_chans; i--; )
456 union { float f; int32_t i; } u;
457 u.f = *p_buffl + 384.0;
458 if(u.i > 0x43c07fff ) * p_buffs = 32767;
459 else if ( u.i < 0x43bf8000 ) *p_buffs = -32768;
460 else *p_buffs = u.i - 0x43c00000;
462 p_buffl++ ; p_buffs++ ;
464 p_state = visual_fft_init();
467 msg_Err(p_aout,"unable to initialize FFT transform");
469 free( p_effect->p_data );
473 p_buffs = p_s16_buff;
474 for ( i = 0 ; i < FFT_BUFFER_SIZE; i++)
477 p_buffer1[i] = *p_buffs;
479 p_buffs += p_effect->i_nb_chans;
480 if( p_buffs >= &p_s16_buff[p_buffer->i_nb_samples * p_effect->i_nb_chans] )
481 p_buffs = p_s16_buff;
483 fft_perform( p_buffer1, p_output, p_state);
484 for(i = 0; i < FFT_BUFFER_SIZE; i++)
486 int sqrti = sqrt(p_output[i]);
487 p_dest[i] = sqrti >> 8;
490 i_nb_bands *= i_sections;
492 for ( i = 0 ; i< i_nb_bands/i_sections ;i++)
494 /* We search the maximum on one scale */
495 for( j = xscale[i] , y=0 ; j< xscale[ i + 1 ] ; j++ )
500 /* Calculate the height of the bar */
501 y >>=7;/* remove some noise */
505 height[i] = logy * y_scale;
514 /* Draw the bar now */
515 i_band_width = floor( p_effect->i_width / (i_nb_bands/i_sections)) ;
517 if( i_amp * height[i] > peaks[i])
519 peaks[i] = i_amp * height[i];
521 else if (peaks[i] > 0 )
523 peaks[i] -= PEAK_SPEED;
524 if( peaks[i] < i_amp * height[i] )
526 peaks[i] = i_amp * height[i];
534 if( i_original != 0 )
536 if( peaks[i] > 0 && i_peak )
538 if( peaks[i] >= p_effect->i_height )
539 peaks[i] = p_effect->i_height - 2;
542 for( j = 0 ; j< i_band_width - i_separ; j++)
544 for( k = 0 ; k< 3 ; k ++)
547 *(p_picture->p[0].p_pixels +
548 (p_effect->i_height - i_line -1 -k ) *
549 p_picture->p[0].i_pitch + (i_band_width*i +j) )
552 *(p_picture->p[1].p_pixels +
553 ( ( p_effect->i_height - i_line ) / 2 -1 -k/2 ) *
554 p_picture->p[1].i_pitch +
555 ( ( i_band_width * i + j ) /2 ) )
558 if( 0x04 * (i_line + k ) - 0x0f > 0 )
560 if ( 0x04 * (i_line + k ) -0x0f < 0xff)
561 *(p_picture->p[2].p_pixels +
562 ( ( p_effect->i_height - i_line ) / 2 - 1 -k/2 ) *
563 p_picture->p[2].i_pitch +
564 ( ( i_band_width * i + j ) /2 ) )
565 = ( 0x04 * ( i_line + k ) ) -0x0f ;
567 *(p_picture->p[2].p_pixels +
568 ( ( p_effect->i_height - i_line ) / 2 - 1 -k/2 ) *
569 p_picture->p[2].i_pitch +
570 ( ( i_band_width * i + j ) /2 ) )
575 *(p_picture->p[2].p_pixels +
576 ( ( p_effect->i_height - i_line ) / 2 - 1 -k/2 ) *
577 p_picture->p[2].i_pitch +
578 ( ( i_band_width * i + j ) /2 ) )
584 if(height[i] * i_amp > p_effect->i_height)
585 height[i] = floor(p_effect->i_height / i_amp );
587 for(i_line = 0 ; i_line < i_amp * height[i]; i_line ++ )
589 for( j = 0 ; j< i_band_width - i_separ ; j++)
591 *(p_picture->p[0].p_pixels +
592 (p_effect->i_height - i_line -1) *
593 p_picture->p[0].i_pitch + (i_band_width*i +j) ) = 0xff;
595 *(p_picture->p[1].p_pixels +
596 ( ( p_effect->i_height - i_line ) / 2 -1) *
597 p_picture->p[1].i_pitch +
598 ( ( i_band_width * i + j ) /2 ) ) = 0x00;
600 if( 0x04 * i_line - 0x0f > 0 )
602 if( 0x04 * i_line - 0x0f < 0xff )
603 *(p_picture->p[2].p_pixels +
604 ( ( p_effect->i_height - i_line ) / 2 - 1) *
605 p_picture->p[2].i_pitch +
606 ( ( i_band_width * i + j ) /2 ) ) =
607 ( 0x04 * i_line) -0x0f ;
609 *(p_picture->p[2].p_pixels +
610 ( ( p_effect->i_height - i_line ) / 2 - 1) *
611 p_picture->p[2].i_pitch +
612 ( ( i_band_width * i + j ) /2 ) ) =
617 *(p_picture->p[2].p_pixels +
618 ( ( p_effect->i_height - i_line ) / 2 - 1) *
619 p_picture->p[2].i_pitch +
620 ( ( i_band_width * i + j ) /2 ) ) =
628 band_sep_angle = 360.0 / i_nb_bands;
629 section_sep_angle = 360.0 / i_sections;
630 if( i_peak_height < 1 )
632 max_band_length = p_effect->i_height / 2 - ( i_rad + i_peak_height + 1 );
634 i_band_width = floor( 360 / i_nb_bands - i_separ );
635 if( i_band_width < 1 )
638 for( c = 0 ; c < i_sections ; c++ )
639 for( i = 0 ; i < (i_nb_bands / i_sections) ; i++ )
642 if( peaks[i] > 0 && i_peak )
644 if( peaks[i] >= p_effect->i_height )
645 peaks[i] = p_effect->i_height - 2;
648 /* circular line pattern(so color blend is more visible) */
649 for( j = 0 ; j < i_peak_height ; j++ )
651 //x = p_picture->p[0].i_pitch / 2;
652 x = p_effect->i_width / 2;
653 y = p_effect->i_height / 2;
656 for( k = 0 ; k < (i_band_width + i_extra_width) ; k++ )
660 a = ( (i+1) * band_sep_angle + section_sep_angle * (c+1) + k )
662 x += (double)( cos(a) * (double)( i_line + j + i_rad ) );
663 y += (double)( -sin(a) * (double)( i_line + j + i_rad ) );
665 *(p_picture->p[0].p_pixels + x + y * p_picture->p[0].i_pitch
666 ) = 255;/* Y(R,G,B); */
671 *(p_picture->p[1].p_pixels + x + y * p_picture->p[1].i_pitch
672 ) = 0;/* U(R,G,B); */
674 if( 0x04 * (i_line + k ) - 0x0f > 0 )
676 if ( 0x04 * (i_line + k ) -0x0f < 0xff)
677 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
678 ) = ( 0x04 * ( i_line + k ) ) -(color1-1);/* -V(R,G,B); */
680 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
681 ) = 255;/* V(R,G,B); */
685 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
686 ) = color1;/* V(R,G,B); */
692 if( (height[i] * i_amp) > p_effect->i_height )
693 height[i] = floor( p_effect->i_height / i_amp );
695 /* DO BASE OF BAND (mostly makes a circle) */
696 if( i_show_base != 0 )
698 //x = p_picture->p[0].i_pitch / 2;
699 x = p_effect->i_width / 2;
700 y = p_effect->i_height / 2;
702 a = ( (i+1) * band_sep_angle + section_sep_angle * (c+1) )
704 x += (double)( cos(a) * (double)i_rad );/* newb-forceful casting */
705 y += (double)( -sin(a) * (double)i_rad );
707 *(p_picture->p[0].p_pixels + x + y * p_picture->p[0].i_pitch
708 ) = 255;/* Y(R,G,B); */
713 *(p_picture->p[1].p_pixels + x + y * p_picture->p[1].i_pitch
714 ) = 0;/* U(R,G,B); */
716 if( 0x04 * i_line - 0x0f > 0 )
718 if( 0x04 * i_line -0x0f < 0xff)
719 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
720 ) = ( 0x04 * i_line) -(color1-1);/* -V(R,G,B); */
722 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
723 ) = 255;/* V(R,G,B); */
727 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
728 ) = color1;/* V(R,G,B); */
733 if( i_show_bands != 0 )
734 for( j = 0 ; j < i_band_width ; j++ )
736 x = p_effect->i_width / 2;
737 y = p_effect->i_height / 2;
740 a = ( (i+1) * band_sep_angle + section_sep_angle * (c+1) + j )
743 for( k = (i_rad+1) ; k < max_band_length ; k++ )
745 if( (k-i_rad) > height[i] )
750 x += (double)( cos(a) * (double)k );/* newbed! */
751 y += (double)( -sin(a) * (double)k );
753 *(p_picture->p[0].p_pixels + x + y * p_picture->p[0].i_pitch
759 *(p_picture->p[1].p_pixels + x + y * p_picture->p[1].i_pitch
762 if( 0x04 * i_line - 0x0f > 0 )
764 if ( 0x04 * i_line -0x0f < 0xff)
765 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
766 ) = ( 0x04 * i_line) -(color1-1);
768 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
773 *(p_picture->p[2].p_pixels + x + y * p_picture->p[2].i_pitch
780 fft_close( p_state );
789 /*****************************************************************************
790 * scope_Run: scope effect
791 *****************************************************************************/
792 int scope_Run(visual_effect_t * p_effect, vlc_object_t *p_aout,
793 const block_t * p_buffer , picture_t * p_picture)
799 uint8_t *ppp_area[2][3];
801 for( i_index = 0 ; i_index < 2 ; i_index++ )
803 for( int j = 0 ; j < 3 ; j++ )
805 ppp_area[i_index][j] =
806 p_picture->p[j].p_pixels + i_index * p_picture->p[j].i_lines
807 / 2 * p_picture->p[j].i_pitch;
811 for( i_index = 0, p_sample = (float *)p_buffer->p_buffer;
812 i_index < __MIN( p_effect->i_width, (int)p_buffer->i_nb_samples );
818 i_value = p_sample[p_effect->i_idx_left] * 127;
820 + p_picture->p[0].i_pitch * i_index / p_effect->i_width
821 + p_picture->p[0].i_lines * i_value / 512
822 * p_picture->p[0].i_pitch) = 0xbf;
824 + p_picture->p[1].i_pitch * i_index / p_effect->i_width
825 + p_picture->p[1].i_lines * i_value / 512
826 * p_picture->p[1].i_pitch) = 0xff;
830 i_value = p_sample[p_effect->i_idx_right] * 127;
832 + p_picture->p[0].i_pitch * i_index / p_effect->i_width
833 + p_picture->p[0].i_lines * i_value / 512
834 * p_picture->p[0].i_pitch) = 0x9f;
836 + p_picture->p[2].i_pitch * i_index / p_effect->i_width
837 + p_picture->p[2].i_lines * i_value / 512
838 * p_picture->p[2].i_pitch) = 0xdd;
840 p_sample += p_effect->i_nb_chans;
846 /*****************************************************************************
847 * vuMeter_Run: vu meter effect
848 *****************************************************************************/
849 int vuMeter_Run(visual_effect_t * p_effect, vlc_object_t *p_aout,
850 const block_t * p_buffer , picture_t * p_picture)
857 /* Compute the peack values */
858 for ( unsigned i = 0 ; i < p_buffer->i_nb_samples; i++ )
860 const float *p_sample = (float *)p_buffer->p_buffer;
863 ch = p_sample[p_effect->i_idx_left] * 256;
867 ch = p_sample[p_effect->i_idx_right] * 256;
871 p_sample += p_effect->i_nb_chans;
874 i_value_l = abs(i_value_l);
875 i_value_r = abs(i_value_r);
877 /* Stay under maximum value admited */
878 if ( i_value_l > 200 * M_PI_2 )
879 i_value_l = 200 * M_PI_2;
880 if ( i_value_r > 200 * M_PI_2 )
881 i_value_r = 200 * M_PI_2;
885 if( !p_effect->p_data )
887 /* Allocate memory to save hand positions */
888 p_effect->p_data = (void *)malloc( 2 * sizeof(float) );
889 i_value = p_effect->p_data;
890 i_value[0] = i_value_l;
891 i_value[1] = i_value_r;
895 /* Make the hands go down slowly if the current values are slower
897 i_value = p_effect->p_data;
899 if ( i_value_l > i_value[0] - 6 )
900 i_value[0] = i_value_l;
902 i_value[0] = i_value[0] - 6;
904 if ( i_value_r > i_value[1] - 6 )
905 i_value[1] = i_value_r;
907 i_value[1] = i_value[1] - 6;
914 for ( j = 0; j < 2; j++ )
916 /* Draw the two scales */
918 teta_grad = GRAD_ANGLE_MIN;
919 for ( teta = -M_PI_4; teta <= M_PI_4; teta = teta + 0.003 )
921 for ( unsigned i = 140; i <= 150; i++ )
923 y = i * cos(teta) + 20;
924 x = i * sin(teta) + 150 + 240 * j;
925 /* Compute the last color for the gradation */
926 if (teta >= teta_grad + GRAD_INCR && teta_grad <= GRAD_ANGLE_MAX)
928 teta_grad = teta_grad + GRAD_INCR;
931 *(p_picture->p[0].p_pixels +
932 (p_picture->p[0].i_lines - y - 1 ) * p_picture->p[0].i_pitch
934 *(p_picture->p[1].p_pixels +
935 (p_picture->p[1].i_lines - y / 2 - 1 ) * p_picture->p[1].i_pitch
937 *(p_picture->p[2].p_pixels +
938 (p_picture->p[2].i_lines - y / 2 - 1 ) * p_picture->p[2].i_pitch
939 + x / 2 ) = 0x4D + k;
943 /* Draw the two hands */
944 teta = (float)i_value[j] / 200 - M_PI_4;
945 for ( int i = 0; i <= 150; i++ )
947 y = i * cos(teta) + 20;
948 x = i * sin(teta) + 150 + 240 * j;
949 *(p_picture->p[0].p_pixels +
950 (p_picture->p[0].i_lines - y - 1 ) * p_picture->p[0].i_pitch
952 *(p_picture->p[1].p_pixels +
953 (p_picture->p[1].i_lines - y / 2 - 1 ) * p_picture->p[1].i_pitch
955 *(p_picture->p[2].p_pixels +
956 (p_picture->p[2].i_lines - y / 2 - 1 ) * p_picture->p[2].i_pitch
960 /* Draw the hand bases */
961 for ( teta = -M_PI_2; teta <= M_PI_2 + 0.01; teta = teta + 0.003 )
963 for ( int i = 0; i < 10; i++ )
965 y = i * cos(teta) + 20;
966 x = i * sin(teta) + 150 + 240 * j;
967 *(p_picture->p[0].p_pixels +
968 (p_picture->p[0].i_lines - y - 1 ) * p_picture->p[0].i_pitch
970 *(p_picture->p[1].p_pixels +
971 (p_picture->p[1].i_lines - y / 2 - 1 ) * p_picture->p[1].i_pitch
973 *(p_picture->p[2].p_pixels +
974 (p_picture->p[2].i_lines - y / 2 - 1 ) * p_picture->p[2].i_pitch