aboutsummaryrefslogtreecommitdiffhomepage
path: root/libmpcodecs/vf_noise.c
blob: d430ef32813218448c05f21a787162fdd8428b67 (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
/*
    Copyright (C) 2002 Michael Niedermayer <michaelni@gmx.at>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/

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

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

#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif

#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "libvo/fastmemcpy.h"

#define MAX_NOISE 4096
#define MAX_SHIFT 1024
#define MAX_RES (MAX_NOISE-MAX_SHIFT)

//===========================================================================//

static inline void lineNoise_C(uint8_t *dst, uint8_t *src, int8_t *noise, int len, int shift);
static inline void lineNoiseAvg_C(uint8_t *dst, uint8_t *src, int len, int8_t **shift);

static void (*lineNoise)(uint8_t *dst, uint8_t *src, int8_t *noise, int len, int shift)= lineNoise_C;
static void (*lineNoiseAvg)(uint8_t *dst, uint8_t *src, int len, int8_t **shift)= lineNoiseAvg_C;

typedef struct FilterParam{
	int strength;
	int uniform;
	int temporal;
	int quality;
        int averaged;
        int pattern;
        int shiftptr;
	int8_t *noise;
	int8_t *prev_shift[MAX_RES][3];
}FilterParam;

struct vf_priv_s {
	FilterParam lumaParam;
	FilterParam chromaParam;
	unsigned int outfmt;
};

static int nonTempRandShift_init;
static int nonTempRandShift[MAX_RES];

static int patt[4] = {
    -1,0,1,0
};

#define RAND_N(range) ((int) ((double)range*rand()/(RAND_MAX+1.0)))
static int8_t *initNoise(FilterParam *fp){
	int strength= fp->strength;
	int uniform= fp->uniform;
	int averaged= fp->averaged;
	int pattern= fp->pattern;
	int8_t *noise= memalign(16, MAX_NOISE*sizeof(int8_t));
	int i, j;

	srand(123457);

	for(i=0,j=0; i<MAX_NOISE; i++,j++)
	{
		if(uniform) {
			if (averaged) {
		    		if (pattern) {
					noise[i]= (RAND_N(strength) - strength/2)/6
						+patt[j%4]*strength*0.25/3;
				} else {
					noise[i]= (RAND_N(strength) - strength/2)/3;
		    		}
			} else {
		    		if (pattern) {
				    noise[i]= (RAND_N(strength) - strength/2)/2
					    + patt[j%4]*strength*0.25;
				} else {
					noise[i]= RAND_N(strength) - strength/2;
		    		}
			}
	    	} else {
			double x1, x2, w, y1;
			do {
				x1 = 2.0 * rand()/(float)RAND_MAX - 1.0;
				x2 = 2.0 * rand()/(float)RAND_MAX - 1.0;
				w = x1 * x1 + x2 * x2;
			} while ( w >= 1.0 );
		
			w = sqrt( (-2.0 * log( w ) ) / w );
			y1= x1 * w;
			y1*= strength / sqrt(3.0);
			if (pattern) {
			    y1 /= 2;
			    y1 += patt[j%4]*strength*0.35;
			}
			if     (y1<-128) y1=-128;
			else if(y1> 127) y1= 127;
			if (averaged) y1 /= 3.0;
			noise[i]= (int)y1;
		}
		if (RAND_N(6) == 0) j--;
	}
	

	for (i = 0; i < MAX_RES; i++)
	    for (j = 0; j < 3; j++)
		fp->prev_shift[i][j] = noise + (rand()&(MAX_SHIFT-1));

	if(!nonTempRandShift_init){
		for(i=0; i<MAX_RES; i++){
			nonTempRandShift[i]= rand()&(MAX_SHIFT-1);
		}
		nonTempRandShift_init = 1;
	}

	fp->noise= noise;
	fp->shiftptr= 0;
	return noise;
}

/***************************************************************************/

#ifdef HAVE_MMX
static inline void lineNoise_MMX(uint8_t *dst, uint8_t *src, int8_t *noise, int len, int shift){
	long mmx_len= len&(~7);
	noise+=shift;

	asm volatile(
		"mov %3, %%"REG_a"		\n\t"
		"pcmpeqb %%mm7, %%mm7		\n\t"
		"psllw $15, %%mm7		\n\t"
		"packsswb %%mm7, %%mm7		\n\t"
		ASMALIGN(4)
		"1:				\n\t"
		"movq (%0, %%"REG_a"), %%mm0	\n\t"
		"movq (%1, %%"REG_a"), %%mm1	\n\t"
		"pxor %%mm7, %%mm0		\n\t"
		"paddsb %%mm1, %%mm0		\n\t"
		"pxor %%mm7, %%mm0		\n\t"
		"movq %%mm0, (%2, %%"REG_a")	\n\t"
		"add $8, %%"REG_a"		\n\t"
		" js 1b				\n\t"
		:: "r" (src+mmx_len), "r" (noise+mmx_len), "r" (dst+mmx_len), "g" (-mmx_len)
		: "%"REG_a
	);
	if(mmx_len!=len)
		lineNoise_C(dst+mmx_len, src+mmx_len, noise+mmx_len, len-mmx_len, 0);
}
#endif

//duplicate of previous except movntq
#ifdef HAVE_MMX2
static inline void lineNoise_MMX2(uint8_t *dst, uint8_t *src, int8_t *noise, int len, int shift){
	long mmx_len= len&(~7);
	noise+=shift;

	asm volatile(
		"mov %3, %%"REG_a"		\n\t"
		"pcmpeqb %%mm7, %%mm7		\n\t"
		"psllw $15, %%mm7		\n\t"
		"packsswb %%mm7, %%mm7		\n\t"
		ASMALIGN(4)
		"1:				\n\t"
		"movq (%0, %%"REG_a"), %%mm0	\n\t"
		"movq (%1, %%"REG_a"), %%mm1	\n\t"
		"pxor %%mm7, %%mm0		\n\t"
		"paddsb %%mm1, %%mm0		\n\t"
		"pxor %%mm7, %%mm0		\n\t"
		"movntq %%mm0, (%2, %%"REG_a")	\n\t"
		"add $8, %%"REG_a"		\n\t"
		" js 1b				\n\t"
		:: "r" (src+mmx_len), "r" (noise+mmx_len), "r" (dst+mmx_len), "g" (-mmx_len)
		: "%"REG_a
	);
	if(mmx_len!=len)
		lineNoise_C(dst+mmx_len, src+mmx_len, noise+mmx_len, len-mmx_len, 0);
}
#endif

static inline void lineNoise_C(uint8_t *dst, uint8_t *src, int8_t *noise, int len, int shift){
	int i;
	noise+= shift;
	for(i=0; i<len; i++)
	{
		int v= src[i]+ noise[i];
		if(v>255) 	dst[i]=255; //FIXME optimize
		else if(v<0) 	dst[i]=0;
		else		dst[i]=v;
	}
}

/***************************************************************************/

#ifdef HAVE_MMX
static inline void lineNoiseAvg_MMX(uint8_t *dst, uint8_t *src, int len, int8_t **shift){
	long mmx_len= len&(~7);

	asm volatile(
		"mov %5, %%"REG_a"		\n\t"
		ASMALIGN(4)
		"1:				\n\t"
		"movq (%1, %%"REG_a"), %%mm1	\n\t"
		"movq (%0, %%"REG_a"), %%mm0	\n\t"
		"paddb (%2, %%"REG_a"), %%mm1	\n\t"
		"paddb (%3, %%"REG_a"), %%mm1	\n\t"
		"movq %%mm0, %%mm2		\n\t"
		"movq %%mm1, %%mm3		\n\t"
		"punpcklbw %%mm0, %%mm0		\n\t"
		"punpckhbw %%mm2, %%mm2		\n\t"
		"punpcklbw %%mm1, %%mm1		\n\t"
		"punpckhbw %%mm3, %%mm3		\n\t"
		"pmulhw %%mm0, %%mm1		\n\t"
		"pmulhw %%mm2, %%mm3		\n\t"
		"paddw %%mm1, %%mm1		\n\t"
		"paddw %%mm3, %%mm3		\n\t"
		"paddw %%mm0, %%mm1		\n\t"
		"paddw %%mm2, %%mm3		\n\t"
		"psrlw $8, %%mm1		\n\t"
		"psrlw $8, %%mm3		\n\t"
                "packuswb %%mm3, %%mm1		\n\t"
		"movq %%mm1, (%4, %%"REG_a")	\n\t"
		"add $8, %%"REG_a"		\n\t"
		" js 1b				\n\t"
		:: "r" (src+mmx_len), "r" (shift[0]+mmx_len), "r" (shift[1]+mmx_len), "r" (shift[2]+mmx_len), 
                   "r" (dst+mmx_len), "g" (-mmx_len)
		: "%"REG_a
	);

	if(mmx_len!=len){
		int8_t *shift2[3]={shift[0]+mmx_len, shift[1]+mmx_len, shift[2]+mmx_len};
		lineNoiseAvg_C(dst+mmx_len, src+mmx_len, len-mmx_len, shift2);
	}
}
#endif

static inline void lineNoiseAvg_C(uint8_t *dst, uint8_t *src, int len, int8_t **shift){
	int i;
        int8_t *src2= (int8_t*)src;
	
	for(i=0; i<len; i++)
	{
	    const int n= shift[0][i] + shift[1][i] + shift[2][i];
	    dst[i]= src2[i]+((n*src2[i])>>7);
	}
}

/***************************************************************************/

static void noise(uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int width, int height, FilterParam *fp){
	int8_t *noise= fp->noise;
	int y;
	int shift=0;

	if(!noise)
	{
		if(src==dst) return;

		if(dstStride==srcStride) memcpy(dst, src, srcStride*height);
		else
		{
			for(y=0; y<height; y++)
			{
				memcpy(dst, src, width);
				dst+= dstStride;
				src+= srcStride;
			}
		}
		return;
	}

	for(y=0; y<height; y++)
	{
		if(fp->temporal)	shift=  rand()&(MAX_SHIFT  -1);
		else			shift= nonTempRandShift[y];

		if(fp->quality==0) shift&= ~7;
		if (fp->averaged) {
		    lineNoiseAvg(dst, src, width, fp->prev_shift[y]);
		    fp->prev_shift[y][fp->shiftptr] = noise + shift;
		} else {
		    lineNoise(dst, src, noise, width, shift);
		}
		dst+= dstStride;
		src+= srcStride;
	}
	fp->shiftptr++;
	if (fp->shiftptr == 3) fp->shiftptr = 0;
}

static int config(struct vf_instance_s* vf,
        int width, int height, int d_width, int d_height,
	unsigned int flags, unsigned int outfmt){

	return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
}

static void get_image(struct vf_instance_s* vf, mp_image_t *mpi){
    if(mpi->flags&MP_IMGFLAG_PRESERVE) return; // don't change
    if(mpi->imgfmt!=vf->priv->outfmt) return; // colorspace differ
    // ok, we can do pp in-place (or pp disabled):
    vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
        mpi->type, mpi->flags, mpi->w, mpi->h);
    mpi->planes[0]=vf->dmpi->planes[0];
    mpi->stride[0]=vf->dmpi->stride[0];
    mpi->width=vf->dmpi->width;
    if(mpi->flags&MP_IMGFLAG_PLANAR){
        mpi->planes[1]=vf->dmpi->planes[1];
        mpi->planes[2]=vf->dmpi->planes[2];
	mpi->stride[1]=vf->dmpi->stride[1];
	mpi->stride[2]=vf->dmpi->stride[2];
    }
    mpi->flags|=MP_IMGFLAG_DIRECT;
}

static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts){
	mp_image_t *dmpi;

	if(!(mpi->flags&MP_IMGFLAG_DIRECT)){
		// no DR, so get a new image! hope we'll get DR buffer:
		vf->dmpi=vf_get_image(vf->next,vf->priv->outfmt,
		MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
		mpi->w,mpi->h);
//printf("nodr\n");
	}
//else printf("dr\n");
	dmpi= vf->dmpi;

	noise(dmpi->planes[0], mpi->planes[0], dmpi->stride[0], mpi->stride[0], mpi->w, mpi->h, &vf->priv->lumaParam);
	noise(dmpi->planes[1], mpi->planes[1], dmpi->stride[1], mpi->stride[1], mpi->w/2, mpi->h/2, &vf->priv->chromaParam);
	noise(dmpi->planes[2], mpi->planes[2], dmpi->stride[2], mpi->stride[2], mpi->w/2, mpi->h/2, &vf->priv->chromaParam);

        vf_clone_mpi_attributes(dmpi, mpi);

#ifdef HAVE_MMX
	if(gCpuCaps.hasMMX) asm volatile ("emms\n\t");
#endif
#ifdef HAVE_MMX2
	if(gCpuCaps.hasMMX2) asm volatile ("sfence\n\t");
#endif

	return vf_next_put_image(vf,dmpi, pts);
}

static void uninit(struct vf_instance_s* vf){
	if(!vf->priv) return;

	if(vf->priv->chromaParam.noise) free(vf->priv->chromaParam.noise);
	vf->priv->chromaParam.noise= NULL;

	if(vf->priv->lumaParam.noise) free(vf->priv->lumaParam.noise);
	vf->priv->lumaParam.noise= NULL;
	
	free(vf->priv);
	vf->priv=NULL;
}

//===========================================================================//

static int query_format(struct vf_instance_s* vf, unsigned int fmt){
	switch(fmt)
	{
	case IMGFMT_YV12:
	case IMGFMT_I420:
	case IMGFMT_IYUV:
		return vf_next_query_format(vf,vf->priv->outfmt);
	}
	return 0;
}

static void parse(FilterParam *fp, char* args){
	char *pos;
	char *max= strchr(args, ':');

	if(!max) max= args + strlen(args);

	fp->strength= atoi(args);
	pos= strchr(args, 'u');
	if(pos && pos<max) fp->uniform=1;
	pos= strchr(args, 't');
	if(pos && pos<max) fp->temporal=1;
	pos= strchr(args, 'h');
	if(pos && pos<max) fp->quality=1;
	pos= strchr(args, 'p');
	if(pos && pos<max) fp->pattern=1;
	pos= strchr(args, 'a');
	if(pos && pos<max) {
	    fp->temporal=1;
	    fp->averaged=1;
	}

	if(fp->strength) initNoise(fp);
}

static unsigned int fmt_list[]={
    IMGFMT_YV12,
    IMGFMT_I420,
    IMGFMT_IYUV,
    0
};

static int open(vf_instance_t *vf, char* args){
    vf->config=config;
    vf->put_image=put_image;
    vf->get_image=get_image;
    vf->query_format=query_format;
    vf->uninit=uninit;
    vf->priv=malloc(sizeof(struct vf_priv_s));
    memset(vf->priv, 0, sizeof(struct vf_priv_s));
    if(args)
    {
	char *arg2= strchr(args,':');
	if(arg2) parse(&vf->priv->chromaParam, arg2+1);
	parse(&vf->priv->lumaParam, args);
    }

    // check csp:
    vf->priv->outfmt=vf_match_csp(&vf->next,fmt_list,IMGFMT_YV12);
    if(!vf->priv->outfmt)
    {
	uninit(vf);
        return 0; // no csp match :(
    }

 
#ifdef HAVE_MMX
    if(gCpuCaps.hasMMX){
        lineNoise= lineNoise_MMX;
        lineNoiseAvg= lineNoiseAvg_MMX;
    }
#endif
#ifdef HAVE_MMX2
    if(gCpuCaps.hasMMX2) lineNoise= lineNoise_MMX2;
//    if(gCpuCaps.hasMMX) lineNoiseAvg= lineNoiseAvg_MMX2;
#endif
    
    return 1;
}

vf_info_t vf_info_noise = {
    "noise generator",
    "noise",
    "Michael Niedermayer",
    "",
    open,
    NULL
};

//===========================================================================//