aboutsummaryrefslogtreecommitdiffhomepage
path: root/libmpcodecs/vf_eq2.c
blob: e7ee9a4b0c378bc2b6a48940238823d5c9c66f48 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
/*
 * vf_eq2.c
 *
 * Software equalizer (brightness, contrast, gamma, saturation)
 *
 * Hampa Hug <hampa@hampa.ch> (original LUT gamma/contrast/brightness filter)
 * Daniel Moreno <comac@comac.darktech.org> (saturation, R/G/B gamma support)
 * Richard Felker (original MMX contrast/brightness code (vf_eq.c))
 * Michael Niedermayer <michalni@gmx.at> (LUT16)
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <inttypes.h>

#include "config.h"
#include "mp_msg.h"
#include "cpudetect.h"

#include "img_format.h"
#include "mp_image.h"
#include "vf.h"

#define LUT16

/* Per channel parameters */
typedef struct eq2_param_t {
  unsigned char lut[256];
#ifdef LUT16
  uint16_t lut16[256*256];
#endif
  int           lut_clean;

  void (*adjust) (struct eq2_param_t *par, unsigned char *dst, unsigned char *src,
    unsigned w, unsigned h, unsigned dstride, unsigned sstride);

  double        c;
  double        b;
  double        g;
  double        w;
} eq2_param_t;

typedef struct vf_priv_s {
  eq2_param_t param[3];

  double        contrast;
  double        brightness;
  double        saturation;

  double        gamma;
  double        gamma_weight;
  double        rgamma;
  double        ggamma;
  double        bgamma;

  unsigned      buf_w[3];
  unsigned      buf_h[3];
  unsigned char *buf[3];
} vf_eq2_t;


static
void create_lut (eq2_param_t *par)
{
  unsigned i;
  double   g, v;
  double   lw, gw;

  g = par->g;
  gw = par->w;
  lw = 1.0 - gw;

  if ((g < 0.001) || (g > 1000.0)) {
    g = 1.0;
  }

  g = 1.0 / g;

  for (i = 0; i < 256; i++) {
    v = (double) i / 255.0;
    v = par->c * (v - 0.5) + 0.5 + par->b;

    if (v <= 0.0) {
      par->lut[i] = 0;
    }
    else {
      v = v*lw + pow(v, g)*gw;

      if (v >= 1.0) {
        par->lut[i] = 255;
      }
      else {
        par->lut[i] = (unsigned char) (256.0 * v);
      }
    }
  }

#ifdef LUT16
  for(i=0; i<256*256; i++){
    par->lut16[i]= par->lut[i&0xFF] + (par->lut[i>>8]<<8);
  }
#endif

  par->lut_clean = 1;
}

#if HAVE_MMX
static
void affine_1d_MMX (eq2_param_t *par, unsigned char *dst, unsigned char *src,
  unsigned w, unsigned h, unsigned dstride, unsigned sstride)
{
  unsigned i;
  int      contrast, brightness;
  unsigned dstep, sstep;
  int      pel;
  short    brvec[4];
  short    contvec[4];

//  printf("\nmmx: src=%p dst=%p w=%d h=%d ds=%d ss=%d\n",src,dst,w,h,dstride,sstride);

  contrast = (int) (par->c * 256 * 16);
  brightness = ((int) (100.0 * par->b + 100.0) * 511) / 200 - 128 - contrast / 32;

  brvec[0] = brvec[1] = brvec[2] = brvec[3] = brightness;
  contvec[0] = contvec[1] = contvec[2] = contvec[3] = contrast;

  sstep = sstride - w;
  dstep = dstride - w;

  while (h-- > 0) {
    __asm__ volatile (
      "movq (%5), %%mm3 \n\t"
      "movq (%6), %%mm4 \n\t"
      "pxor %%mm0, %%mm0 \n\t"
      "movl %4, %%eax\n\t"
      ASMALIGN(4)
      "1: \n\t"
      "movq (%0), %%mm1 \n\t"
      "movq (%0), %%mm2 \n\t"
      "punpcklbw %%mm0, %%mm1 \n\t"
      "punpckhbw %%mm0, %%mm2 \n\t"
      "psllw $4, %%mm1 \n\t"
      "psllw $4, %%mm2 \n\t"
      "pmulhw %%mm4, %%mm1 \n\t"
      "pmulhw %%mm4, %%mm2 \n\t"
      "paddw %%mm3, %%mm1 \n\t"
      "paddw %%mm3, %%mm2 \n\t"
      "packuswb %%mm2, %%mm1 \n\t"
      "add $8, %0 \n\t"
      "movq %%mm1, (%1) \n\t"
      "add $8, %1 \n\t"
      "decl %%eax \n\t"
      "jnz 1b \n\t"
      : "=r" (src), "=r" (dst)
      : "0" (src), "1" (dst), "r" (w >> 3), "r" (brvec), "r" (contvec)
      : "%eax"
    );

    for (i = w & 7; i > 0; i--) {
      pel = ((*src++ * contrast) >> 12) + brightness;
      if (pel & 768) {
        pel = (-pel) >> 31;
      }
      *dst++ = pel;
    }

    src += sstep;
    dst += dstep;
  }

  __asm__ volatile ( "emms \n\t" ::: "memory" );
}
#endif

static
void apply_lut (eq2_param_t *par, unsigned char *dst, unsigned char *src,
  unsigned w, unsigned h, unsigned dstride, unsigned sstride)
{
  unsigned      i, j, w2;
  unsigned char *lut;
  uint16_t *lut16;

  if (!par->lut_clean) {
    create_lut (par);
  }

  lut = par->lut;
#ifdef LUT16
  lut16 = par->lut16;
  w2= (w>>3)<<2;
  for (j = 0; j < h; j++) {
    uint16_t *src16= (uint16_t*)src;
    uint16_t *dst16= (uint16_t*)dst;
    for (i = 0; i < w2; i+=4) {
      dst16[i+0] = lut16[src16[i+0]];
      dst16[i+1] = lut16[src16[i+1]];
      dst16[i+2] = lut16[src16[i+2]];
      dst16[i+3] = lut16[src16[i+3]];
    }
    i <<= 1;
#else
  w2= (w>>3)<<3;
  for (j = 0; j < h; j++) {
    for (i = 0; i < w2; i+=8) {
      dst[i+0] = lut[src[i+0]];
      dst[i+1] = lut[src[i+1]];
      dst[i+2] = lut[src[i+2]];
      dst[i+3] = lut[src[i+3]];
      dst[i+4] = lut[src[i+4]];
      dst[i+5] = lut[src[i+5]];
      dst[i+6] = lut[src[i+6]];
      dst[i+7] = lut[src[i+7]];
    }
#endif
    for (; i < w; i++) {
      dst[i] = lut[src[i]];
    }

    src += sstride;
    dst += dstride;
  }
}

static
int put_image (vf_instance_t *vf, mp_image_t *src, double pts)
{
  unsigned      i;
  vf_eq2_t      *eq2;
  mp_image_t    *dst;
  unsigned long img_n,img_c;

  eq2 = vf->priv;

  if ((eq2->buf_w[0] != src->w) || (eq2->buf_h[0] != src->h)) {
    eq2->buf_w[0] = src->w;
    eq2->buf_h[0] = src->h;
      eq2->buf_w[1] = eq2->buf_w[2] = src->w >> src->chroma_x_shift;
      eq2->buf_h[1] = eq2->buf_h[2] = src->h >> src->chroma_y_shift;
    img_n = eq2->buf_w[0]*eq2->buf_h[0];
    if(src->num_planes>1){
      img_c = eq2->buf_w[1]*eq2->buf_h[1];
      eq2->buf[0] = (unsigned char *) realloc (eq2->buf[0], img_n + 2*img_c);
      eq2->buf[1] = eq2->buf[0] + img_n;
      eq2->buf[2] = eq2->buf[1] + img_c;
    } else
      eq2->buf[0] = (unsigned char *) realloc (eq2->buf[0], img_n);
  }

  dst = vf_get_image (vf->next, src->imgfmt, MP_IMGTYPE_EXPORT, 0, src->w, src->h);

  for (i = 0; i < ((src->num_planes>1)?3:1); i++) {
    if (eq2->param[i].adjust != NULL) {
      dst->planes[i] = eq2->buf[i];
      dst->stride[i] = eq2->buf_w[i];

      eq2->param[i].adjust (&eq2->param[i], dst->planes[i], src->planes[i],
        eq2->buf_w[i], eq2->buf_h[i], dst->stride[i], src->stride[i]);
    }
    else {
      dst->planes[i] = src->planes[i];
      dst->stride[i] = src->stride[i];
    }
  }

  return vf_next_put_image (vf, dst, pts);
}

static
void check_values (eq2_param_t *par)
{
  /* yuck! floating point comparisons... */

  if ((par->c == 1.0) && (par->b == 0.0) && (par->g == 1.0)) {
    par->adjust = NULL;
  }
#if HAVE_MMX
  else if (par->g == 1.0 && gCpuCaps.hasMMX) {
    par->adjust = &affine_1d_MMX;
  }
#endif
  else {
    par->adjust = &apply_lut;
  }
}

static
void print_values (vf_eq2_t *eq2)
{
  mp_msg (MSGT_VFILTER, MSGL_V, "vf_eq2: c=%.2f b=%.2f g=%.4f s=%.2f \n",
    eq2->contrast, eq2->brightness, eq2->gamma, eq2->saturation
  );
}

static
void set_contrast (vf_eq2_t *eq2, double c)
{
  eq2->contrast = c;
  eq2->param[0].c = c;
  eq2->param[0].lut_clean = 0;
  check_values (&eq2->param[0]);
  print_values (eq2);
}

static
void set_brightness (vf_eq2_t *eq2, double b)
{
  eq2->brightness = b;
  eq2->param[0].b = b;
  eq2->param[0].lut_clean = 0;
  check_values (&eq2->param[0]);
  print_values (eq2);
}

static
void set_gamma (vf_eq2_t *eq2, double g)
{
  eq2->gamma = g;

  eq2->param[0].g = eq2->gamma * eq2->ggamma;
  eq2->param[1].g = sqrt (eq2->bgamma / eq2->ggamma);
  eq2->param[2].g = sqrt (eq2->rgamma / eq2->ggamma);
  eq2->param[0].w = eq2->param[1].w = eq2->param[2].w = eq2->gamma_weight;

  eq2->param[0].lut_clean = 0;
  eq2->param[1].lut_clean = 0;
  eq2->param[2].lut_clean = 0;

  check_values (&eq2->param[0]);
  check_values (&eq2->param[1]);
  check_values (&eq2->param[2]);

  print_values (eq2);
}

static
void set_saturation (vf_eq2_t *eq2, double s)
{
  eq2->saturation = s;

  eq2->param[1].c = s;
  eq2->param[2].c = s;

  eq2->param[1].lut_clean = 0;
  eq2->param[2].lut_clean = 0;

  check_values (&eq2->param[1]);
  check_values (&eq2->param[2]);

  print_values (eq2);
}

static
int control (vf_instance_t *vf, int request, void *data)
{
  vf_equalizer_t *eq;

  switch (request) {
    case VFCTRL_SET_EQUALIZER:
      eq = (vf_equalizer_t *) data;

      if (strcmp (eq->item, "gamma") == 0) {
        set_gamma (vf->priv, exp (log (8.0) * eq->value / 100.0));
        return CONTROL_TRUE;
      }
      else if (strcmp (eq->item, "contrast") == 0) {
        set_contrast (vf->priv, (1.0 / 100.0) * (eq->value + 100));
        return CONTROL_TRUE;
      }
      else if (strcmp (eq->item, "brightness") == 0) {
        set_brightness (vf->priv, (1.0 / 100.0) * eq->value);
        return CONTROL_TRUE;
      }
      else if (strcmp (eq->item, "saturation") == 0) {
        set_saturation (vf->priv, (double) (eq->value + 100) / 100.0);
        return CONTROL_TRUE;
      }
      break;

    case VFCTRL_GET_EQUALIZER:
      eq = (vf_equalizer_t *) data;
      if (strcmp (eq->item, "gamma") == 0) {
        eq->value = (int) (100.0 * log (vf->priv->gamma) / log (8.0));
        return CONTROL_TRUE;
      }
      else if (strcmp (eq->item, "contrast") == 0) {
        eq->value = (int) (100.0 * vf->priv->contrast) - 100;
        return CONTROL_TRUE;
      }
      else if (strcmp (eq->item, "brightness") == 0) {
        eq->value = (int) (100.0 * vf->priv->brightness);
        return CONTROL_TRUE;
      }
      else if (strcmp (eq->item, "saturation") == 0) {
        eq->value = (int) (100.0 * vf->priv->saturation) - 100;
        return CONTROL_TRUE;
      }
      break;
  }

  return vf_next_control (vf, request, data);
}

static
int query_format (vf_instance_t *vf, unsigned fmt)
{
  switch (fmt) {
    case IMGFMT_YVU9:
    case IMGFMT_IF09:
    case IMGFMT_YV12:
    case IMGFMT_I420:
    case IMGFMT_IYUV:
    case IMGFMT_Y800:
    case IMGFMT_Y8:
    case IMGFMT_444P:
    case IMGFMT_422P:
    case IMGFMT_411P:
      return vf_next_query_format (vf, fmt);
  }

  return 0;
}

static
void uninit (vf_instance_t *vf)
{
  if (vf->priv != NULL) {
    free (vf->priv->buf[0]);
    free (vf->priv);
  }
}

static
int open (vf_instance_t *vf, char *args)
{
  unsigned i;
  vf_eq2_t *eq2;
  double   par[8];

  vf->control = control;
  vf->query_format = query_format;
  vf->put_image = put_image;
  vf->uninit = uninit;

  vf->priv = (vf_eq2_t *) malloc (sizeof (vf_eq2_t));
  eq2 = vf->priv;

  for (i = 0; i < 3; i++) {
    eq2->buf[i] = NULL;
    eq2->buf_w[i] = 0;
    eq2->buf_h[i] = 0;

    eq2->param[i].adjust = NULL;
    eq2->param[i].c = 1.0;
    eq2->param[i].b = 0.0;
    eq2->param[i].g = 1.0;
    eq2->param[i].lut_clean = 0;
  }

  eq2->contrast = 1.0;
  eq2->brightness = 0.0;
  eq2->saturation = 1.0;

  eq2->gamma = 1.0;
  eq2->gamma_weight = 1.0;
  eq2->rgamma = 1.0;
  eq2->ggamma = 1.0;
  eq2->bgamma = 1.0;

  if (args != NULL) {
    par[0] = 1.0;
    par[1] = 1.0;
    par[2] = 0.0;
    par[3] = 1.0;
    par[4] = 1.0;
    par[5] = 1.0;
    par[6] = 1.0;
    par[7] = 1.0;
    sscanf (args, "%lf:%lf:%lf:%lf:%lf:%lf:%lf:%lf",
      par, par + 1, par + 2, par + 3, par + 4, par + 5, par + 6, par + 7
    );

    eq2->rgamma = par[4];
    eq2->ggamma = par[5];
    eq2->bgamma = par[6];
    eq2->gamma_weight = par[7];

    set_gamma (eq2, par[0]);
    set_contrast (eq2, par[1]);
    set_brightness (eq2, par[2]);
    set_saturation (eq2, par[3]);
  }

  return 1;
}

const vf_info_t vf_info_eq2 = {
  "Software equalizer",
  "eq2",
  "Hampa Hug, Daniel Moreno, Richard Felker",
  "",
  &open,
  NULL
};