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1
/*
2
 * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
3
 *
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 * This file is part of FFmpeg.
5
 *
6
 * FFmpeg is free software; you can redistribute it and/or
7
 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
10
 *
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 * FFmpeg is distributed in the hope that it will be useful,
12
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
20

    
21
#define _SVID_SOURCE //needed for MAP_ANONYMOUS
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#define _DARWIN_C_SOURCE // needed for MAP_ANON
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#include <inttypes.h>
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#include <string.h>
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#include <math.h>
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#include <stdio.h>
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#include "config.h"
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#include <assert.h>
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#if HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
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#define MAP_ANONYMOUS MAP_ANON
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#endif
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#endif
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#if HAVE_VIRTUALALLOC
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
38
#endif
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#include "swscale.h"
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#include "swscale_internal.h"
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#include "rgb2rgb.h"
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#include "libavutil/intreadwrite.h"
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#include "libavutil/x86_cpu.h"
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#include "libavutil/avutil.h"
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#include "libavutil/bswap.h"
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#include "libavutil/pixdesc.h"
47

    
48
unsigned swscale_version(void)
49
{
50
    return LIBSWSCALE_VERSION_INT;
51
}
52

    
53
const char *swscale_configuration(void)
54
{
55
    return FFMPEG_CONFIGURATION;
56
}
57

    
58
const char *swscale_license(void)
59
{
60
#define LICENSE_PREFIX "libswscale license: "
61
    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
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}
63

    
64
#define RET 0xC3 //near return opcode for x86
65

    
66
#define isSupportedIn(x)    (       \
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           (x)==PIX_FMT_YUV420P     \
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        || (x)==PIX_FMT_YUVA420P    \
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        || (x)==PIX_FMT_YUYV422     \
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        || (x)==PIX_FMT_UYVY422     \
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        || (x)==PIX_FMT_RGB48BE     \
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        || (x)==PIX_FMT_RGB48LE     \
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        || (x)==PIX_FMT_RGB32       \
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        || (x)==PIX_FMT_RGB32_1     \
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        || (x)==PIX_FMT_BGR24       \
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        || (x)==PIX_FMT_BGR565      \
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        || (x)==PIX_FMT_BGR555      \
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        || (x)==PIX_FMT_BGR32       \
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        || (x)==PIX_FMT_BGR32_1     \
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        || (x)==PIX_FMT_RGB24       \
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        || (x)==PIX_FMT_RGB565      \
82
        || (x)==PIX_FMT_RGB555      \
83
        || (x)==PIX_FMT_GRAY8       \
84
        || (x)==PIX_FMT_Y400A       \
85
        || (x)==PIX_FMT_YUV410P     \
86
        || (x)==PIX_FMT_YUV440P     \
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        || (x)==PIX_FMT_NV12        \
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        || (x)==PIX_FMT_NV21        \
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        || (x)==PIX_FMT_GRAY16BE    \
90
        || (x)==PIX_FMT_GRAY16LE    \
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        || (x)==PIX_FMT_YUV444P     \
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        || (x)==PIX_FMT_YUV422P     \
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        || (x)==PIX_FMT_YUV411P     \
94
        || (x)==PIX_FMT_YUVJ420P    \
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        || (x)==PIX_FMT_YUVJ422P    \
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        || (x)==PIX_FMT_YUVJ440P    \
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        || (x)==PIX_FMT_YUVJ444P    \
98
        || (x)==PIX_FMT_PAL8        \
99
        || (x)==PIX_FMT_BGR8        \
100
        || (x)==PIX_FMT_RGB8        \
101
        || (x)==PIX_FMT_BGR4_BYTE   \
102
        || (x)==PIX_FMT_RGB4_BYTE   \
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        || (x)==PIX_FMT_YUV440P     \
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        || (x)==PIX_FMT_MONOWHITE   \
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        || (x)==PIX_FMT_MONOBLACK   \
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        || (x)==PIX_FMT_YUV420P16LE   \
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        || (x)==PIX_FMT_YUV422P16LE   \
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        || (x)==PIX_FMT_YUV444P16LE   \
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        || (x)==PIX_FMT_YUV420P16BE   \
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        || (x)==PIX_FMT_YUV422P16BE   \
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        || (x)==PIX_FMT_YUV444P16BE   \
112
    )
113

    
114
int sws_isSupportedInput(enum PixelFormat pix_fmt)
115
{
116
    return isSupportedIn(pix_fmt);
117
}
118

    
119
#define isSupportedOut(x)   (       \
120
           (x)==PIX_FMT_YUV420P     \
121
        || (x)==PIX_FMT_YUVA420P    \
122
        || (x)==PIX_FMT_YUYV422     \
123
        || (x)==PIX_FMT_UYVY422     \
124
        || (x)==PIX_FMT_YUV444P     \
125
        || (x)==PIX_FMT_YUV422P     \
126
        || (x)==PIX_FMT_YUV411P     \
127
        || (x)==PIX_FMT_YUVJ420P    \
128
        || (x)==PIX_FMT_YUVJ422P    \
129
        || (x)==PIX_FMT_YUVJ440P    \
130
        || (x)==PIX_FMT_YUVJ444P    \
131
        || isAnyRGB(x)              \
132
        || (x)==PIX_FMT_NV12        \
133
        || (x)==PIX_FMT_NV21        \
134
        || (x)==PIX_FMT_GRAY16BE    \
135
        || (x)==PIX_FMT_GRAY16LE    \
136
        || (x)==PIX_FMT_GRAY8       \
137
        || (x)==PIX_FMT_YUV410P     \
138
        || (x)==PIX_FMT_YUV440P     \
139
        || (x)==PIX_FMT_YUV420P16LE   \
140
        || (x)==PIX_FMT_YUV422P16LE   \
141
        || (x)==PIX_FMT_YUV444P16LE   \
142
        || (x)==PIX_FMT_YUV420P16BE   \
143
        || (x)==PIX_FMT_YUV422P16BE   \
144
        || (x)==PIX_FMT_YUV444P16BE   \
145
    )
146

    
147
int sws_isSupportedOutput(enum PixelFormat pix_fmt)
148
{
149
    return isSupportedOut(pix_fmt);
150
}
151

    
152
extern const int32_t ff_yuv2rgb_coeffs[8][4];
153

    
154
const char *sws_format_name(enum PixelFormat format)
155
{
156
    if ((unsigned)format < PIX_FMT_NB && av_pix_fmt_descriptors[format].name)
157
        return av_pix_fmt_descriptors[format].name;
158
    else
159
        return "Unknown format";
160
}
161

    
162
static double getSplineCoeff(double a, double b, double c, double d, double dist)
163
{
164
//    printf("%f %f %f %f %f\n", a,b,c,d,dist);
165
    if (dist<=1.0) return ((d*dist + c)*dist + b)*dist +a;
166
    else           return getSplineCoeff(        0.0,
167
                                          b+ 2.0*c + 3.0*d,
168
                                                 c + 3.0*d,
169
                                         -b- 3.0*c - 6.0*d,
170
                                         dist-1.0);
171
}
172

    
173
static int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,
174
                      int srcW, int dstW, int filterAlign, int one, int flags,
175
                      SwsVector *srcFilter, SwsVector *dstFilter, double param[2])
176
{
177
    int i;
178
    int filterSize;
179
    int filter2Size;
180
    int minFilterSize;
181
    int64_t *filter=NULL;
182
    int64_t *filter2=NULL;
183
    const int64_t fone= 1LL<<54;
184
    int ret= -1;
185
#if ARCH_X86
186
    if (flags & SWS_CPU_CAPS_MMX)
187
        __asm__ volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions)
188
#endif
189

    
190
    // NOTE: the +1 is for the MMX scaler which reads over the end
191
    FF_ALLOC_OR_GOTO(NULL, *filterPos, (dstW+1)*sizeof(int16_t), fail);
192

    
193
    if (FFABS(xInc - 0x10000) <10) { // unscaled
194
        int i;
195
        filterSize= 1;
196
        FF_ALLOCZ_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
197

    
198
        for (i=0; i<dstW; i++) {
199
            filter[i*filterSize]= fone;
200
            (*filterPos)[i]=i;
201
        }
202

    
203
    } else if (flags&SWS_POINT) { // lame looking point sampling mode
204
        int i;
205
        int xDstInSrc;
206
        filterSize= 1;
207
        FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
208

    
209
        xDstInSrc= xInc/2 - 0x8000;
210
        for (i=0; i<dstW; i++) {
211
            int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
212

    
213
            (*filterPos)[i]= xx;
214
            filter[i]= fone;
215
            xDstInSrc+= xInc;
216
        }
217
    } else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) { // bilinear upscale
218
        int i;
219
        int xDstInSrc;
220
        filterSize= 2;
221
        FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
222

    
223
        xDstInSrc= xInc/2 - 0x8000;
224
        for (i=0; i<dstW; i++) {
225
            int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
226
            int j;
227

    
228
            (*filterPos)[i]= xx;
229
            //bilinear upscale / linear interpolate / area averaging
230
            for (j=0; j<filterSize; j++) {
231
                int64_t coeff= fone - FFABS((xx<<16) - xDstInSrc)*(fone>>16);
232
                if (coeff<0) coeff=0;
233
                filter[i*filterSize + j]= coeff;
234
                xx++;
235
            }
236
            xDstInSrc+= xInc;
237
        }
238
    } else {
239
        int xDstInSrc;
240
        int sizeFactor;
241

    
242
        if      (flags&SWS_BICUBIC)      sizeFactor=  4;
243
        else if (flags&SWS_X)            sizeFactor=  8;
244
        else if (flags&SWS_AREA)         sizeFactor=  1; //downscale only, for upscale it is bilinear
245
        else if (flags&SWS_GAUSS)        sizeFactor=  8;   // infinite ;)
246
        else if (flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? ceil(2*param[0]) : 6;
247
        else if (flags&SWS_SINC)         sizeFactor= 20; // infinite ;)
248
        else if (flags&SWS_SPLINE)       sizeFactor= 20;  // infinite ;)
249
        else if (flags&SWS_BILINEAR)     sizeFactor=  2;
250
        else {
251
            sizeFactor= 0; //GCC warning killer
252
            assert(0);
253
        }
254

    
255
        if (xInc <= 1<<16)      filterSize= 1 + sizeFactor; // upscale
256
        else                    filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW;
257

    
258
        if (filterSize > srcW-2) filterSize=srcW-2;
259

    
260
        FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
261

    
262
        xDstInSrc= xInc - 0x10000;
263
        for (i=0; i<dstW; i++) {
264
            int xx= (xDstInSrc - ((filterSize-2)<<16)) / (1<<17);
265
            int j;
266
            (*filterPos)[i]= xx;
267
            for (j=0; j<filterSize; j++) {
268
                int64_t d= ((int64_t)FFABS((xx<<17) - xDstInSrc))<<13;
269
                double floatd;
270
                int64_t coeff;
271

    
272
                if (xInc > 1<<16)
273
                    d= d*dstW/srcW;
274
                floatd= d * (1.0/(1<<30));
275

    
276
                if (flags & SWS_BICUBIC) {
277
                    int64_t B= (param[0] != SWS_PARAM_DEFAULT ? param[0] :   0) * (1<<24);
278
                    int64_t C= (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1<<24);
279
                    int64_t dd = ( d*d)>>30;
280
                    int64_t ddd= (dd*d)>>30;
281

    
282
                    if      (d < 1LL<<30)
283
                        coeff = (12*(1<<24)-9*B-6*C)*ddd + (-18*(1<<24)+12*B+6*C)*dd + (6*(1<<24)-2*B)*(1<<30);
284
                    else if (d < 1LL<<31)
285
                        coeff = (-B-6*C)*ddd + (6*B+30*C)*dd + (-12*B-48*C)*d + (8*B+24*C)*(1<<30);
286
                    else
287
                        coeff=0.0;
288
                    coeff *= fone>>(30+24);
289
                }
290
/*                else if (flags & SWS_X) {
291
                    double p= param ? param*0.01 : 0.3;
292
                    coeff = d ? sin(d*M_PI)/(d*M_PI) : 1.0;
293
                    coeff*= pow(2.0, - p*d*d);
294
                }*/
295
                else if (flags & SWS_X) {
296
                    double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
297
                    double c;
298

    
299
                    if (floatd<1.0)
300
                        c = cos(floatd*M_PI);
301
                    else
302
                        c=-1.0;
303
                    if (c<0.0)      c= -pow(-c, A);
304
                    else            c=  pow( c, A);
305
                    coeff= (c*0.5 + 0.5)*fone;
306
                } else if (flags & SWS_AREA) {
307
                    int64_t d2= d - (1<<29);
308
                    if      (d2*xInc < -(1LL<<(29+16))) coeff= 1.0 * (1LL<<(30+16));
309
                    else if (d2*xInc <  (1LL<<(29+16))) coeff= -d2*xInc + (1LL<<(29+16));
310
                    else coeff=0.0;
311
                    coeff *= fone>>(30+16);
312
                } else if (flags & SWS_GAUSS) {
313
                    double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
314
                    coeff = (pow(2.0, - p*floatd*floatd))*fone;
315
                } else if (flags & SWS_SINC) {
316
                    coeff = (d ? sin(floatd*M_PI)/(floatd*M_PI) : 1.0)*fone;
317
                } else if (flags & SWS_LANCZOS) {
318
                    double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
319
                    coeff = (d ? sin(floatd*M_PI)*sin(floatd*M_PI/p)/(floatd*floatd*M_PI*M_PI/p) : 1.0)*fone;
320
                    if (floatd>p) coeff=0;
321
                } else if (flags & SWS_BILINEAR) {
322
                    coeff= (1<<30) - d;
323
                    if (coeff<0) coeff=0;
324
                    coeff *= fone >> 30;
325
                } else if (flags & SWS_SPLINE) {
326
                    double p=-2.196152422706632;
327
                    coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, floatd) * fone;
328
                } else {
329
                    coeff= 0.0; //GCC warning killer
330
                    assert(0);
331
                }
332

    
333
                filter[i*filterSize + j]= coeff;
334
                xx++;
335
            }
336
            xDstInSrc+= 2*xInc;
337
        }
338
    }
339

    
340
    /* apply src & dst Filter to filter -> filter2
341
       av_free(filter);
342
    */
343
    assert(filterSize>0);
344
    filter2Size= filterSize;
345
    if (srcFilter) filter2Size+= srcFilter->length - 1;
346
    if (dstFilter) filter2Size+= dstFilter->length - 1;
347
    assert(filter2Size>0);
348
    FF_ALLOCZ_OR_GOTO(NULL, filter2, filter2Size*dstW*sizeof(*filter2), fail);
349

    
350
    for (i=0; i<dstW; i++) {
351
        int j, k;
352

    
353
        if(srcFilter) {
354
            for (k=0; k<srcFilter->length; k++) {
355
                for (j=0; j<filterSize; j++)
356
                    filter2[i*filter2Size + k + j] += srcFilter->coeff[k]*filter[i*filterSize + j];
357
            }
358
        } else {
359
            for (j=0; j<filterSize; j++)
360
                filter2[i*filter2Size + j]= filter[i*filterSize + j];
361
        }
362
        //FIXME dstFilter
363

    
364
        (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;
365
    }
366
    av_freep(&filter);
367

    
368
    /* try to reduce the filter-size (step1 find size and shift left) */
369
    // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).
370
    minFilterSize= 0;
371
    for (i=dstW-1; i>=0; i--) {
372
        int min= filter2Size;
373
        int j;
374
        int64_t cutOff=0.0;
375

    
376
        /* get rid of near zero elements on the left by shifting left */
377
        for (j=0; j<filter2Size; j++) {
378
            int k;
379
            cutOff += FFABS(filter2[i*filter2Size]);
380

    
381
            if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;
382

    
383
            /* preserve monotonicity because the core can't handle the filter otherwise */
384
            if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;
385

    
386
            // move filter coefficients left
387
            for (k=1; k<filter2Size; k++)
388
                filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];
389
            filter2[i*filter2Size + k - 1]= 0;
390
            (*filterPos)[i]++;
391
        }
392

    
393
        cutOff=0;
394
        /* count near zeros on the right */
395
        for (j=filter2Size-1; j>0; j--) {
396
            cutOff += FFABS(filter2[i*filter2Size + j]);
397

    
398
            if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;
399
            min--;
400
        }
401

    
402
        if (min>minFilterSize) minFilterSize= min;
403
    }
404

    
405
    if (flags & SWS_CPU_CAPS_ALTIVEC) {
406
        // we can handle the special case 4,
407
        // so we don't want to go to the full 8
408
        if (minFilterSize < 5)
409
            filterAlign = 4;
410

    
411
        // We really don't want to waste our time
412
        // doing useless computation, so fall back on
413
        // the scalar C code for very small filters.
414
        // Vectorizing is worth it only if you have a
415
        // decent-sized vector.
416
        if (minFilterSize < 3)
417
            filterAlign = 1;
418
    }
419

    
420
    if (flags & SWS_CPU_CAPS_MMX) {
421
        // special case for unscaled vertical filtering
422
        if (minFilterSize == 1 && filterAlign == 2)
423
            filterAlign= 1;
424
    }
425

    
426
    assert(minFilterSize > 0);
427
    filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));
428
    assert(filterSize > 0);
429
    filter= av_malloc(filterSize*dstW*sizeof(*filter));
430
    if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter)
431
        goto fail;
432
    *outFilterSize= filterSize;
433

    
434
    if (flags&SWS_PRINT_INFO)
435
        av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);
436
    /* try to reduce the filter-size (step2 reduce it) */
437
    for (i=0; i<dstW; i++) {
438
        int j;
439

    
440
        for (j=0; j<filterSize; j++) {
441
            if (j>=filter2Size) filter[i*filterSize + j]= 0;
442
            else               filter[i*filterSize + j]= filter2[i*filter2Size + j];
443
            if((flags & SWS_BITEXACT) && j>=minFilterSize)
444
                filter[i*filterSize + j]= 0;
445
        }
446
    }
447

    
448
    //FIXME try to align filterPos if possible
449

    
450
    //fix borders
451
    for (i=0; i<dstW; i++) {
452
        int j;
453
        if ((*filterPos)[i] < 0) {
454
            // move filter coefficients left to compensate for filterPos
455
            for (j=1; j<filterSize; j++) {
456
                int left= FFMAX(j + (*filterPos)[i], 0);
457
                filter[i*filterSize + left] += filter[i*filterSize + j];
458
                filter[i*filterSize + j]=0;
459
            }
460
            (*filterPos)[i]= 0;
461
        }
462

    
463
        if ((*filterPos)[i] + filterSize > srcW) {
464
            int shift= (*filterPos)[i] + filterSize - srcW;
465
            // move filter coefficients right to compensate for filterPos
466
            for (j=filterSize-2; j>=0; j--) {
467
                int right= FFMIN(j + shift, filterSize-1);
468
                filter[i*filterSize +right] += filter[i*filterSize +j];
469
                filter[i*filterSize +j]=0;
470
            }
471
            (*filterPos)[i]= srcW - filterSize;
472
        }
473
    }
474

    
475
    // Note the +1 is for the MMX scaler which reads over the end
476
    /* align at 16 for AltiVec (needed by hScale_altivec_real) */
477
    FF_ALLOCZ_OR_GOTO(NULL, *outFilter, *outFilterSize*(dstW+1)*sizeof(int16_t), fail);
478

    
479
    /* normalize & store in outFilter */
480
    for (i=0; i<dstW; i++) {
481
        int j;
482
        int64_t error=0;
483
        int64_t sum=0;
484

    
485
        for (j=0; j<filterSize; j++) {
486
            sum+= filter[i*filterSize + j];
487
        }
488
        sum= (sum + one/2)/ one;
489
        for (j=0; j<*outFilterSize; j++) {
490
            int64_t v= filter[i*filterSize + j] + error;
491
            int intV= ROUNDED_DIV(v, sum);
492
            (*outFilter)[i*(*outFilterSize) + j]= intV;
493
            error= v - intV*sum;
494
        }
495
    }
496

    
497
    (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end
498
    for (i=0; i<*outFilterSize; i++) {
499
        int j= dstW*(*outFilterSize);
500
        (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];
501
    }
502

    
503
    ret=0;
504
fail:
505
    av_free(filter);
506
    av_free(filter2);
507
    return ret;
508
}
509

    
510
#if ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT)
511
static int initMMX2HScaler(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits)
512
{
513
    uint8_t *fragmentA;
514
    x86_reg imm8OfPShufW1A;
515
    x86_reg imm8OfPShufW2A;
516
    x86_reg fragmentLengthA;
517
    uint8_t *fragmentB;
518
    x86_reg imm8OfPShufW1B;
519
    x86_reg imm8OfPShufW2B;
520
    x86_reg fragmentLengthB;
521
    int fragmentPos;
522

    
523
    int xpos, i;
524

    
525
    // create an optimized horizontal scaling routine
526
    /* This scaler is made of runtime-generated MMX2 code using specially
527
     * tuned pshufw instructions. For every four output pixels, if four
528
     * input pixels are enough for the fast bilinear scaling, then a chunk
529
     * of fragmentB is used. If five input pixels are needed, then a chunk
530
     * of fragmentA is used.
531
     */
532

    
533
    //code fragment
534

    
535
    __asm__ volatile(
536
        "jmp                         9f                 \n\t"
537
    // Begin
538
        "0:                                             \n\t"
539
        "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"
540
        "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"
541
        "movd   1(%%"REG_c", %%"REG_S"), %%mm1          \n\t"
542
        "punpcklbw                %%mm7, %%mm1          \n\t"
543
        "punpcklbw                %%mm7, %%mm0          \n\t"
544
        "pshufw                   $0xFF, %%mm1, %%mm1   \n\t"
545
        "1:                                             \n\t"
546
        "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"
547
        "2:                                             \n\t"
548
        "psubw                    %%mm1, %%mm0          \n\t"
549
        "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"
550
        "pmullw                   %%mm3, %%mm0          \n\t"
551
        "psllw                       $7, %%mm1          \n\t"
552
        "paddw                    %%mm1, %%mm0          \n\t"
553

    
554
        "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"
555

    
556
        "add                         $8, %%"REG_a"      \n\t"
557
    // End
558
        "9:                                             \n\t"
559
//        "int $3                                         \n\t"
560
        "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"
561
        "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"
562
        "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"
563
        "dec                         %1                 \n\t"
564
        "dec                         %2                 \n\t"
565
        "sub                         %0, %1             \n\t"
566
        "sub                         %0, %2             \n\t"
567
        "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"
568
        "sub                         %0, %3             \n\t"
569

    
570

    
571
        :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),
572
        "=r" (fragmentLengthA)
573
    );
574

    
575
    __asm__ volatile(
576
        "jmp                         9f                 \n\t"
577
    // Begin
578
        "0:                                             \n\t"
579
        "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"
580
        "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"
581
        "punpcklbw                %%mm7, %%mm0          \n\t"
582
        "pshufw                   $0xFF, %%mm0, %%mm1   \n\t"
583
        "1:                                             \n\t"
584
        "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"
585
        "2:                                             \n\t"
586
        "psubw                    %%mm1, %%mm0          \n\t"
587
        "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"
588
        "pmullw                   %%mm3, %%mm0          \n\t"
589
        "psllw                       $7, %%mm1          \n\t"
590
        "paddw                    %%mm1, %%mm0          \n\t"
591

    
592
        "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"
593

    
594
        "add                         $8, %%"REG_a"      \n\t"
595
    // End
596
        "9:                                             \n\t"
597
//        "int                       $3                   \n\t"
598
        "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"
599
        "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"
600
        "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"
601
        "dec                         %1                 \n\t"
602
        "dec                         %2                 \n\t"
603
        "sub                         %0, %1             \n\t"
604
        "sub                         %0, %2             \n\t"
605
        "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"
606
        "sub                         %0, %3             \n\t"
607

    
608

    
609
        :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),
610
        "=r" (fragmentLengthB)
611
    );
612

    
613
    xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers
614
    fragmentPos=0;
615

    
616
    for (i=0; i<dstW/numSplits; i++) {
617
        int xx=xpos>>16;
618

    
619
        if ((i&3) == 0) {
620
            int a=0;
621
            int b=((xpos+xInc)>>16) - xx;
622
            int c=((xpos+xInc*2)>>16) - xx;
623
            int d=((xpos+xInc*3)>>16) - xx;
624
            int inc                = (d+1<4);
625
            uint8_t *fragment      = (d+1<4) ? fragmentB       : fragmentA;
626
            x86_reg imm8OfPShufW1  = (d+1<4) ? imm8OfPShufW1B  : imm8OfPShufW1A;
627
            x86_reg imm8OfPShufW2  = (d+1<4) ? imm8OfPShufW2B  : imm8OfPShufW2A;
628
            x86_reg fragmentLength = (d+1<4) ? fragmentLengthB : fragmentLengthA;
629
            int maxShift= 3-(d+inc);
630
            int shift=0;
631

    
632
            if (filterCode) {
633
                filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;
634
                filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;
635
                filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;
636
                filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;
637
                filterPos[i/2]= xx;
638

    
639
                memcpy(filterCode + fragmentPos, fragment, fragmentLength);
640

    
641
                filterCode[fragmentPos + imm8OfPShufW1]=
642
                    (a+inc) | ((b+inc)<<2) | ((c+inc)<<4) | ((d+inc)<<6);
643
                filterCode[fragmentPos + imm8OfPShufW2]=
644
                    a | (b<<2) | (c<<4) | (d<<6);
645

    
646
                if (i+4-inc>=dstW) shift=maxShift; //avoid overread
647
                else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align
648

    
649
                if (shift && i>=shift) {
650
                    filterCode[fragmentPos + imm8OfPShufW1]+= 0x55*shift;
651
                    filterCode[fragmentPos + imm8OfPShufW2]+= 0x55*shift;
652
                    filterPos[i/2]-=shift;
653
                }
654
            }
655

    
656
            fragmentPos+= fragmentLength;
657

    
658
            if (filterCode)
659
                filterCode[fragmentPos]= RET;
660
        }
661
        xpos+=xInc;
662
    }
663
    if (filterCode)
664
        filterPos[((i/2)+1)&(~1)]= xpos>>16; // needed to jump to the next part
665

    
666
    return fragmentPos + 1;
667
}
668
#endif /* ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) */
669

    
670
static void getSubSampleFactors(int *h, int *v, enum PixelFormat format)
671
{
672
    *h = av_pix_fmt_descriptors[format].log2_chroma_w;
673
    *v = av_pix_fmt_descriptors[format].log2_chroma_h;
674
}
675

    
676
static int update_flags_cpu(int flags);
677

    
678
int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation)
679
{
680
    memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);
681
    memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);
682

    
683
    c->brightness= brightness;
684
    c->contrast  = contrast;
685
    c->saturation= saturation;
686
    c->srcRange  = srcRange;
687
    c->dstRange  = dstRange;
688
    if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
689

    
690
    c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[c->dstFormat]);
691
    c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[c->srcFormat]);
692
    c->flags = update_flags_cpu(c->flags);
693

    
694
    ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);
695
    //FIXME factorize
696

    
697
#if HAVE_ALTIVEC
698
    if (c->flags & SWS_CPU_CAPS_ALTIVEC)
699
        ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness, contrast, saturation);
700
#endif
701
    return 0;
702
}
703

    
704
int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)
705
{
706
    if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
707

    
708
    *inv_table = c->srcColorspaceTable;
709
    *table     = c->dstColorspaceTable;
710
    *srcRange  = c->srcRange;
711
    *dstRange  = c->dstRange;
712
    *brightness= c->brightness;
713
    *contrast  = c->contrast;
714
    *saturation= c->saturation;
715

    
716
    return 0;
717
}
718

    
719
static int handle_jpeg(enum PixelFormat *format)
720
{
721
    switch (*format) {
722
    case PIX_FMT_YUVJ420P: *format = PIX_FMT_YUV420P; return 1;
723
    case PIX_FMT_YUVJ422P: *format = PIX_FMT_YUV422P; return 1;
724
    case PIX_FMT_YUVJ444P: *format = PIX_FMT_YUV444P; return 1;
725
    case PIX_FMT_YUVJ440P: *format = PIX_FMT_YUV440P; return 1;
726
    default:                                          return 0;
727
    }
728
}
729

    
730
static int update_flags_cpu(int flags)
731
{
732
#if !CONFIG_RUNTIME_CPUDETECT //ensure that the flags match the compiled variant if cpudetect is off
733
    flags &= ~( SWS_CPU_CAPS_MMX
734
               |SWS_CPU_CAPS_MMX2
735
               |SWS_CPU_CAPS_3DNOW
736
               |SWS_CPU_CAPS_SSE2
737
               |SWS_CPU_CAPS_ALTIVEC
738
               |SWS_CPU_CAPS_BFIN);
739
    flags |= ff_hardcodedcpuflags();
740
#endif /* CONFIG_RUNTIME_CPUDETECT */
741
    return flags;
742
}
743

    
744
SwsContext *sws_alloc_context(void){
745
    SwsContext *c= av_mallocz(sizeof(SwsContext));
746

    
747
    c->av_class = &sws_context_class;
748

    
749
    return c;
750
}
751

    
752
int sws_init_context(SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter){
753
    int i;
754
    int usesVFilter, usesHFilter;
755
    int unscaled;
756
    SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};
757
    int srcW= c->srcW;
758
    int srcH= c->srcH;
759
    int dstW= c->dstW;
760
    int dstH= c->dstH;
761
    int flags;
762
    enum PixelFormat srcFormat= c->srcFormat;
763
    enum PixelFormat dstFormat= c->dstFormat;
764

    
765
    flags= c->flags = update_flags_cpu(c->flags);
766
#if ARCH_X86
767
    if (flags & SWS_CPU_CAPS_MMX)
768
        __asm__ volatile("emms\n\t"::: "memory");
769
#endif
770
    if (!rgb15to16) sws_rgb2rgb_init(flags);
771

    
772
    unscaled = (srcW == dstW && srcH == dstH);
773

    
774
    if (!isSupportedIn(srcFormat)) {
775
        av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", sws_format_name(srcFormat));
776
        return AVERROR(EINVAL);
777
    }
778
    if (!isSupportedOut(dstFormat)) {
779
        av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output pixel format\n", sws_format_name(dstFormat));
780
        return AVERROR(EINVAL);
781
    }
782

    
783
    i= flags & ( SWS_POINT
784
                |SWS_AREA
785
                |SWS_BILINEAR
786
                |SWS_FAST_BILINEAR
787
                |SWS_BICUBIC
788
                |SWS_X
789
                |SWS_GAUSS
790
                |SWS_LANCZOS
791
                |SWS_SINC
792
                |SWS_SPLINE
793
                |SWS_BICUBLIN);
794
    if(!i || (i & (i-1))) {
795
        av_log(NULL, AV_LOG_ERROR, "swScaler: Exactly one scaler algorithm must be chosen\n");
796
        return AVERROR(EINVAL);
797
    }
798
    /* sanity check */
799
    if (srcW<4 || srcH<1 || dstW<8 || dstH<1) { //FIXME check if these are enough and try to lowwer them after fixing the relevant parts of the code
800
        av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",
801
               srcW, srcH, dstW, dstH);
802
        return AVERROR(EINVAL);
803
    }
804
    if(srcW > VOFW || dstW > VOFW) {
805
        av_log(NULL, AV_LOG_ERROR, "swScaler: Compile-time maximum width is "AV_STRINGIFY(VOFW)" change VOF/VOFW and recompile\n");
806
        return AVERROR(EINVAL);
807
    }
808

    
809
    if (!dstFilter) dstFilter= &dummyFilter;
810
    if (!srcFilter) srcFilter= &dummyFilter;
811

    
812
    c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;
813
    c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;
814
    c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[dstFormat]);
815
    c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[srcFormat]);
816
    c->vRounder= 4* 0x0001000100010001ULL;
817

    
818
    usesVFilter = (srcFilter->lumV && srcFilter->lumV->length>1) ||
819
                  (srcFilter->chrV && srcFilter->chrV->length>1) ||
820
                  (dstFilter->lumV && dstFilter->lumV->length>1) ||
821
                  (dstFilter->chrV && dstFilter->chrV->length>1);
822
    usesHFilter = (srcFilter->lumH && srcFilter->lumH->length>1) ||
823
                  (srcFilter->chrH && srcFilter->chrH->length>1) ||
824
                  (dstFilter->lumH && dstFilter->lumH->length>1) ||
825
                  (dstFilter->chrH && dstFilter->chrH->length>1);
826

    
827
    getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);
828
    getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);
829

    
830
    // reuse chroma for 2 pixels RGB/BGR unless user wants full chroma interpolation
831
    if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;
832

    
833
    // drop some chroma lines if the user wants it
834
    c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;
835
    c->chrSrcVSubSample+= c->vChrDrop;
836

    
837
    // drop every other pixel for chroma calculation unless user wants full chroma
838
    if (isAnyRGB(srcFormat) && !(flags&SWS_FULL_CHR_H_INP)
839
      && srcFormat!=PIX_FMT_RGB8      && srcFormat!=PIX_FMT_BGR8
840
      && srcFormat!=PIX_FMT_RGB4      && srcFormat!=PIX_FMT_BGR4
841
      && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE
842
      && ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&SWS_FAST_BILINEAR)))
843
        c->chrSrcHSubSample=1;
844

    
845
    // Note the -((-x)>>y) is so that we always round toward +inf.
846
    c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);
847
    c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);
848
    c->chrDstW= -((-dstW) >> c->chrDstHSubSample);
849
    c->chrDstH= -((-dstH) >> c->chrDstVSubSample);
850

    
851
    /* unscaled special cases */
852
    if (unscaled && !usesHFilter && !usesVFilter && (c->srcRange == c->dstRange || isAnyRGB(dstFormat))) {
853
        ff_get_unscaled_swscale(c);
854

    
855
        if (c->swScale) {
856
            if (flags&SWS_PRINT_INFO)
857
                av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",
858
                       sws_format_name(srcFormat), sws_format_name(dstFormat));
859
            return 0;
860
        }
861
    }
862

    
863
    if (flags & SWS_CPU_CAPS_MMX2) {
864
        c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;
865
        if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR)) {
866
            if (flags&SWS_PRINT_INFO)
867
                av_log(c, AV_LOG_INFO, "output width is not a multiple of 32 -> no MMX2 scaler\n");
868
        }
869
        if (usesHFilter) c->canMMX2BeUsed=0;
870
    }
871
    else
872
        c->canMMX2BeUsed=0;
873

    
874
    c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;
875
    c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;
876

    
877
    // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst
878
    // but only for the FAST_BILINEAR mode otherwise do correct scaling
879
    // n-2 is the last chrominance sample available
880
    // this is not perfect, but no one should notice the difference, the more correct variant
881
    // would be like the vertical one, but that would require some special code for the
882
    // first and last pixel
883
    if (flags&SWS_FAST_BILINEAR) {
884
        if (c->canMMX2BeUsed) {
885
            c->lumXInc+= 20;
886
            c->chrXInc+= 20;
887
        }
888
        //we don't use the x86 asm scaler if MMX is available
889
        else if (flags & SWS_CPU_CAPS_MMX) {
890
            c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;
891
            c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;
892
        }
893
    }
894

    
895
    /* precalculate horizontal scaler filter coefficients */
896
    {
897
#if ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT)
898
// can't downscale !!!
899
        if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR)) {
900
            c->lumMmx2FilterCodeSize = initMMX2HScaler(      dstW, c->lumXInc, NULL, NULL, NULL, 8);
901
            c->chrMmx2FilterCodeSize = initMMX2HScaler(c->chrDstW, c->chrXInc, NULL, NULL, NULL, 4);
902

    
903
#ifdef MAP_ANONYMOUS
904
            c->lumMmx2FilterCode = mmap(NULL, c->lumMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
905
            c->chrMmx2FilterCode = mmap(NULL, c->chrMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
906
#elif HAVE_VIRTUALALLOC
907
            c->lumMmx2FilterCode = VirtualAlloc(NULL, c->lumMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
908
            c->chrMmx2FilterCode = VirtualAlloc(NULL, c->chrMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
909
#else
910
            c->lumMmx2FilterCode = av_malloc(c->lumMmx2FilterCodeSize);
911
            c->chrMmx2FilterCode = av_malloc(c->chrMmx2FilterCodeSize);
912
#endif
913

    
914
            if (!c->lumMmx2FilterCode || !c->chrMmx2FilterCode)
915
                return AVERROR(ENOMEM);
916
            FF_ALLOCZ_OR_GOTO(c, c->hLumFilter   , (dstW        /8+8)*sizeof(int16_t), fail);
917
            FF_ALLOCZ_OR_GOTO(c, c->hChrFilter   , (c->chrDstW  /4+8)*sizeof(int16_t), fail);
918
            FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW      /2/8+8)*sizeof(int32_t), fail);
919
            FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW/2/4+8)*sizeof(int32_t), fail);
920

    
921
            initMMX2HScaler(      dstW, c->lumXInc, c->lumMmx2FilterCode, c->hLumFilter, c->hLumFilterPos, 8);
922
            initMMX2HScaler(c->chrDstW, c->chrXInc, c->chrMmx2FilterCode, c->hChrFilter, c->hChrFilterPos, 4);
923

    
924
#ifdef MAP_ANONYMOUS
925
            mprotect(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize, PROT_EXEC | PROT_READ);
926
            mprotect(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize, PROT_EXEC | PROT_READ);
927
#endif
928
        } else
929
#endif /* ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) */
930
        {
931
            const int filterAlign=
932
                (flags & SWS_CPU_CAPS_MMX) ? 4 :
933
                (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :
934
                1;
935

    
936
            if (initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,
937
                           srcW      ,       dstW, filterAlign, 1<<14,
938
                           (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,
939
                           srcFilter->lumH, dstFilter->lumH, c->param) < 0)
940
                goto fail;
941
            if (initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,
942
                           c->chrSrcW, c->chrDstW, filterAlign, 1<<14,
943
                           (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,
944
                           srcFilter->chrH, dstFilter->chrH, c->param) < 0)
945
                goto fail;
946
        }
947
    } // initialize horizontal stuff
948

    
949
    /* precalculate vertical scaler filter coefficients */
950
    {
951
        const int filterAlign=
952
            (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :
953
            (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :
954
            1;
955

    
956
        if (initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,
957
                       srcH      ,        dstH, filterAlign, (1<<12),
958
                       (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,
959
                       srcFilter->lumV, dstFilter->lumV, c->param) < 0)
960
            goto fail;
961
        if (initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,
962
                       c->chrSrcH, c->chrDstH, filterAlign, (1<<12),
963
                       (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,
964
                       srcFilter->chrV, dstFilter->chrV, c->param) < 0)
965
            goto fail;
966

    
967
#if HAVE_ALTIVEC
968
        FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof (vector signed short)*c->vLumFilterSize*c->dstH, fail);
969
        FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH, fail);
970

    
971
        for (i=0;i<c->vLumFilterSize*c->dstH;i++) {
972
            int j;
973
            short *p = (short *)&c->vYCoeffsBank[i];
974
            for (j=0;j<8;j++)
975
                p[j] = c->vLumFilter[i];
976
        }
977

    
978
        for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {
979
            int j;
980
            short *p = (short *)&c->vCCoeffsBank[i];
981
            for (j=0;j<8;j++)
982
                p[j] = c->vChrFilter[i];
983
        }
984
#endif
985
    }
986

    
987
    // calculate buffer sizes so that they won't run out while handling these damn slices
988
    c->vLumBufSize= c->vLumFilterSize;
989
    c->vChrBufSize= c->vChrFilterSize;
990
    for (i=0; i<dstH; i++) {
991
        int chrI= i*c->chrDstH / dstH;
992
        int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,
993
                           ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));
994

    
995
        nextSlice>>= c->chrSrcVSubSample;
996
        nextSlice<<= c->chrSrcVSubSample;
997
        if (c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)
998
            c->vLumBufSize= nextSlice - c->vLumFilterPos[i];
999
        if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))
1000
            c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];
1001
    }
1002

    
1003
    // allocate pixbufs (we use dynamic allocation because otherwise we would need to
1004
    // allocate several megabytes to handle all possible cases)
1005
    FF_ALLOC_OR_GOTO(c, c->lumPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);
1006
    FF_ALLOC_OR_GOTO(c, c->chrPixBuf, c->vChrBufSize*2*sizeof(int16_t*), fail);
1007
    if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat))
1008
        FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);
1009
    //Note we need at least one pixel more at the end because of the MMX code (just in case someone wanna replace the 4000/8000)
1010
    /* align at 16 bytes for AltiVec */
1011
    for (i=0; i<c->vLumBufSize; i++) {
1012
        FF_ALLOCZ_OR_GOTO(c, c->lumPixBuf[i+c->vLumBufSize], VOF+1, fail);
1013
        c->lumPixBuf[i] = c->lumPixBuf[i+c->vLumBufSize];
1014
    }
1015
    for (i=0; i<c->vChrBufSize; i++) {
1016
        FF_ALLOC_OR_GOTO(c, c->chrPixBuf[i+c->vChrBufSize], (VOF+1)*2, fail);
1017
        c->chrPixBuf[i] = c->chrPixBuf[i+c->vChrBufSize];
1018
    }
1019
    if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf)
1020
        for (i=0; i<c->vLumBufSize; i++) {
1021
            FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf[i+c->vLumBufSize], VOF+1, fail);
1022
            c->alpPixBuf[i] = c->alpPixBuf[i+c->vLumBufSize];
1023
        }
1024

    
1025
    //try to avoid drawing green stuff between the right end and the stride end
1026
    for (i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, (VOF+1)*2);
1027

    
1028
    assert(2*VOFW == VOF);
1029

    
1030
    assert(c->chrDstH <= dstH);
1031

    
1032
    if (flags&SWS_PRINT_INFO) {
1033
        if (flags&SWS_FAST_BILINEAR)
1034
            av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");
1035
        else if (flags&SWS_BILINEAR)
1036
            av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");
1037
        else if (flags&SWS_BICUBIC)
1038
            av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");
1039
        else if (flags&SWS_X)
1040
            av_log(c, AV_LOG_INFO, "Experimental scaler, ");
1041
        else if (flags&SWS_POINT)
1042
            av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");
1043
        else if (flags&SWS_AREA)
1044
            av_log(c, AV_LOG_INFO, "Area Averaging scaler, ");
1045
        else if (flags&SWS_BICUBLIN)
1046
            av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");
1047
        else if (flags&SWS_GAUSS)
1048
            av_log(c, AV_LOG_INFO, "Gaussian scaler, ");
1049
        else if (flags&SWS_SINC)
1050
            av_log(c, AV_LOG_INFO, "Sinc scaler, ");
1051
        else if (flags&SWS_LANCZOS)
1052
            av_log(c, AV_LOG_INFO, "Lanczos scaler, ");
1053
        else if (flags&SWS_SPLINE)
1054
            av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");
1055
        else
1056
            av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");
1057

    
1058
        av_log(c, AV_LOG_INFO, "from %s to %s%s ",
1059
               sws_format_name(srcFormat),
1060
#ifdef DITHER1XBPP
1061
               dstFormat == PIX_FMT_BGR555 || dstFormat == PIX_FMT_BGR565 ||
1062
               dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE ||
1063
               dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE ? "dithered " : "",
1064
#else
1065
               "",
1066
#endif
1067
               sws_format_name(dstFormat));
1068

    
1069
        if (flags & SWS_CPU_CAPS_MMX2)
1070
            av_log(c, AV_LOG_INFO, "using MMX2\n");
1071
        else if (flags & SWS_CPU_CAPS_3DNOW)
1072
            av_log(c, AV_LOG_INFO, "using 3DNOW\n");
1073
        else if (flags & SWS_CPU_CAPS_MMX)
1074
            av_log(c, AV_LOG_INFO, "using MMX\n");
1075
        else if (flags & SWS_CPU_CAPS_ALTIVEC)
1076
            av_log(c, AV_LOG_INFO, "using AltiVec\n");
1077
        else
1078
            av_log(c, AV_LOG_INFO, "using C\n");
1079

    
1080
        if (flags & SWS_CPU_CAPS_MMX) {
1081
            if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))
1082
                av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");
1083
            else {
1084
                if (c->hLumFilterSize==4)
1085
                    av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n");
1086
                else if (c->hLumFilterSize==8)
1087
                    av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n");
1088
                else
1089
                    av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n");
1090

    
1091
                if (c->hChrFilterSize==4)
1092
                    av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n");
1093
                else if (c->hChrFilterSize==8)
1094
                    av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n");
1095
                else
1096
                    av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n");
1097
            }
1098
        } else {
1099
#if ARCH_X86
1100
            av_log(c, AV_LOG_VERBOSE, "using x86 asm scaler for horizontal scaling\n");
1101
#else
1102
            if (flags & SWS_FAST_BILINEAR)
1103
                av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n");
1104
            else
1105
                av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n");
1106
#endif
1107
        }
1108
        if (isPlanarYUV(dstFormat)) {
1109
            if (c->vLumFilterSize==1)
1110
                av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1111
            else
1112
                av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1113
        } else {
1114
            if (c->vLumFilterSize==1 && c->vChrFilterSize==2)
1115
                av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"
1116
                       "      2-tap scaler for vertical chrominance scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1117
            else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)
1118
                av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1119
            else
1120
                av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1121
        }
1122

    
1123
        if (dstFormat==PIX_FMT_BGR24)
1124
            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 converter\n",
1125
                   (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));
1126
        else if (dstFormat==PIX_FMT_RGB32)
1127
            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1128
        else if (dstFormat==PIX_FMT_BGR565)
1129
            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1130
        else if (dstFormat==PIX_FMT_BGR555)
1131
            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1132
        else if (dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE ||
1133
                 dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE)
1134
            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR12 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1135

    
1136
        av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
1137
        av_log(c, AV_LOG_DEBUG, "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1138
               c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
1139
        av_log(c, AV_LOG_DEBUG, "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1140
               c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);
1141
    }
1142

    
1143
    c->swScale= ff_getSwsFunc(c);
1144
    return 0;
1145
fail: //FIXME replace things by appropriate error codes
1146
    return -1;
1147
}
1148

    
1149
#if FF_API_SWS_GETCONTEXT
1150
SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
1151
                           int dstW, int dstH, enum PixelFormat dstFormat, int flags,
1152
                           SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
1153
{
1154
    SwsContext *c;
1155

    
1156
    if(!(c=sws_alloc_context()))
1157
        return NULL;
1158

    
1159
    c->flags= flags;
1160
    c->srcW= srcW;
1161
    c->srcH= srcH;
1162
    c->dstW= dstW;
1163
    c->dstH= dstH;
1164
    c->srcRange = handle_jpeg(&srcFormat);
1165
    c->dstRange = handle_jpeg(&dstFormat);
1166
    c->srcFormat= srcFormat;
1167
    c->dstFormat= dstFormat;
1168

    
1169
    if (param) {
1170
        c->param[0] = param[0];
1171
        c->param[1] = param[1];
1172
    } else {
1173
        c->param[0] =
1174
        c->param[1] = SWS_PARAM_DEFAULT;
1175
    }
1176
    sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], c->srcRange, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT] /* FIXME*/, c->dstRange, 0, 1<<16, 1<<16);
1177

    
1178
    if(sws_init_context(c, srcFilter, dstFilter) < 0){
1179
        sws_freeContext(c);
1180
        return NULL;
1181
    }
1182

    
1183
    return c;
1184
}
1185
#endif
1186

    
1187
SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
1188
                                float lumaSharpen, float chromaSharpen,
1189
                                float chromaHShift, float chromaVShift,
1190
                                int verbose)
1191
{
1192
    SwsFilter *filter= av_malloc(sizeof(SwsFilter));
1193
    if (!filter)
1194
        return NULL;
1195

    
1196
    if (lumaGBlur!=0.0) {
1197
        filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);
1198
        filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);
1199
    } else {
1200
        filter->lumH= sws_getIdentityVec();
1201
        filter->lumV= sws_getIdentityVec();
1202
    }
1203

    
1204
    if (chromaGBlur!=0.0) {
1205
        filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);
1206
        filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);
1207
    } else {
1208
        filter->chrH= sws_getIdentityVec();
1209
        filter->chrV= sws_getIdentityVec();
1210
    }
1211

    
1212
    if (chromaSharpen!=0.0) {
1213
        SwsVector *id= sws_getIdentityVec();
1214
        sws_scaleVec(filter->chrH, -chromaSharpen);
1215
        sws_scaleVec(filter->chrV, -chromaSharpen);
1216
        sws_addVec(filter->chrH, id);
1217
        sws_addVec(filter->chrV, id);
1218
        sws_freeVec(id);
1219
    }
1220

    
1221
    if (lumaSharpen!=0.0) {
1222
        SwsVector *id= sws_getIdentityVec();
1223
        sws_scaleVec(filter->lumH, -lumaSharpen);
1224
        sws_scaleVec(filter->lumV, -lumaSharpen);
1225
        sws_addVec(filter->lumH, id);
1226
        sws_addVec(filter->lumV, id);
1227
        sws_freeVec(id);
1228
    }
1229

    
1230
    if (chromaHShift != 0.0)
1231
        sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));
1232

    
1233
    if (chromaVShift != 0.0)
1234
        sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));
1235

    
1236
    sws_normalizeVec(filter->chrH, 1.0);
1237
    sws_normalizeVec(filter->chrV, 1.0);
1238
    sws_normalizeVec(filter->lumH, 1.0);
1239
    sws_normalizeVec(filter->lumV, 1.0);
1240

    
1241
    if (verbose) sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);
1242
    if (verbose) sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);
1243

    
1244
    return filter;
1245
}
1246

    
1247
SwsVector *sws_allocVec(int length)
1248
{
1249
    SwsVector *vec = av_malloc(sizeof(SwsVector));
1250
    if (!vec)
1251
        return NULL;
1252
    vec->length = length;
1253
    vec->coeff  = av_malloc(sizeof(double) * length);
1254
    if (!vec->coeff)
1255
        av_freep(&vec);
1256
    return vec;
1257
}
1258

    
1259
SwsVector *sws_getGaussianVec(double variance, double quality)
1260
{
1261
    const int length= (int)(variance*quality + 0.5) | 1;
1262
    int i;
1263
    double middle= (length-1)*0.5;
1264
    SwsVector *vec= sws_allocVec(length);
1265

    
1266
    if (!vec)
1267
        return NULL;
1268

    
1269
    for (i=0; i<length; i++) {
1270
        double dist= i-middle;
1271
        vec->coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*M_PI);
1272
    }
1273

    
1274
    sws_normalizeVec(vec, 1.0);
1275

    
1276
    return vec;
1277
}
1278

    
1279
SwsVector *sws_getConstVec(double c, int length)
1280
{
1281
    int i;
1282
    SwsVector *vec= sws_allocVec(length);
1283

    
1284
    if (!vec)
1285
        return NULL;
1286

    
1287
    for (i=0; i<length; i++)
1288
        vec->coeff[i]= c;
1289

    
1290
    return vec;
1291
}
1292

    
1293
SwsVector *sws_getIdentityVec(void)
1294
{
1295
    return sws_getConstVec(1.0, 1);
1296
}
1297

    
1298
static double sws_dcVec(SwsVector *a)
1299
{
1300
    int i;
1301
    double sum=0;
1302

    
1303
    for (i=0; i<a->length; i++)
1304
        sum+= a->coeff[i];
1305

    
1306
    return sum;
1307
}
1308

    
1309
void sws_scaleVec(SwsVector *a, double scalar)
1310
{
1311
    int i;
1312

    
1313
    for (i=0; i<a->length; i++)
1314
        a->coeff[i]*= scalar;
1315
}
1316

    
1317
void sws_normalizeVec(SwsVector *a, double height)
1318
{
1319
    sws_scaleVec(a, height/sws_dcVec(a));
1320
}
1321

    
1322
static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b)
1323
{
1324
    int length= a->length + b->length - 1;
1325
    int i, j;
1326
    SwsVector *vec= sws_getConstVec(0.0, length);
1327

    
1328
    if (!vec)
1329
        return NULL;
1330

    
1331
    for (i=0; i<a->length; i++) {
1332
        for (j=0; j<b->length; j++) {
1333
            vec->coeff[i+j]+= a->coeff[i]*b->coeff[j];
1334
        }
1335
    }
1336

    
1337
    return vec;
1338
}
1339

    
1340
static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b)
1341
{
1342
    int length= FFMAX(a->length, b->length);
1343
    int i;
1344
    SwsVector *vec= sws_getConstVec(0.0, length);
1345

    
1346
    if (!vec)
1347
        return NULL;
1348

    
1349
    for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
1350
    for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];
1351

    
1352
    return vec;
1353
}
1354

    
1355
static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b)
1356
{
1357
    int length= FFMAX(a->length, b->length);
1358
    int i;
1359
    SwsVector *vec= sws_getConstVec(0.0, length);
1360

    
1361
    if (!vec)
1362
        return NULL;
1363

    
1364
    for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
1365
    for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];
1366

    
1367
    return vec;
1368
}
1369

    
1370
/* shift left / or right if "shift" is negative */
1371
static SwsVector *sws_getShiftedVec(SwsVector *a, int shift)
1372
{
1373
    int length= a->length + FFABS(shift)*2;
1374
    int i;
1375
    SwsVector *vec= sws_getConstVec(0.0, length);
1376

    
1377
    if (!vec)
1378
        return NULL;
1379

    
1380
    for (i=0; i<a->length; i++) {
1381
        vec->coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];
1382
    }
1383

    
1384
    return vec;
1385
}
1386

    
1387
void sws_shiftVec(SwsVector *a, int shift)
1388
{
1389
    SwsVector *shifted= sws_getShiftedVec(a, shift);
1390
    av_free(a->coeff);
1391
    a->coeff= shifted->coeff;
1392
    a->length= shifted->length;
1393
    av_free(shifted);
1394
}
1395

    
1396
void sws_addVec(SwsVector *a, SwsVector *b)
1397
{
1398
    SwsVector *sum= sws_sumVec(a, b);
1399
    av_free(a->coeff);
1400
    a->coeff= sum->coeff;
1401
    a->length= sum->length;
1402
    av_free(sum);
1403
}
1404

    
1405
void sws_subVec(SwsVector *a, SwsVector *b)
1406
{
1407
    SwsVector *diff= sws_diffVec(a, b);
1408
    av_free(a->coeff);
1409
    a->coeff= diff->coeff;
1410
    a->length= diff->length;
1411
    av_free(diff);
1412
}
1413

    
1414
void sws_convVec(SwsVector *a, SwsVector *b)
1415
{
1416
    SwsVector *conv= sws_getConvVec(a, b);
1417
    av_free(a->coeff);
1418
    a->coeff= conv->coeff;
1419
    a->length= conv->length;
1420
    av_free(conv);
1421
}
1422

    
1423
SwsVector *sws_cloneVec(SwsVector *a)
1424
{
1425
    int i;
1426
    SwsVector *vec= sws_allocVec(a->length);
1427

    
1428
    if (!vec)
1429
        return NULL;
1430

    
1431
    for (i=0; i<a->length; i++) vec->coeff[i]= a->coeff[i];
1432

    
1433
    return vec;
1434
}
1435

    
1436
void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)
1437
{
1438
    int i;
1439
    double max=0;
1440
    double min=0;
1441
    double range;
1442

    
1443
    for (i=0; i<a->length; i++)
1444
        if (a->coeff[i]>max) max= a->coeff[i];
1445

    
1446
    for (i=0; i<a->length; i++)
1447
        if (a->coeff[i]<min) min= a->coeff[i];
1448

    
1449
    range= max - min;
1450

    
1451
    for (i=0; i<a->length; i++) {
1452
        int x= (int)((a->coeff[i]-min)*60.0/range +0.5);
1453
        av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);
1454
        for (;x>0; x--) av_log(log_ctx, log_level, " ");
1455
        av_log(log_ctx, log_level, "|\n");
1456
    }
1457
}
1458

    
1459
#if LIBSWSCALE_VERSION_MAJOR < 1
1460
void sws_printVec(SwsVector *a)
1461
{
1462
    sws_printVec2(a, NULL, AV_LOG_DEBUG);
1463
}
1464
#endif
1465

    
1466
void sws_freeVec(SwsVector *a)
1467
{
1468
    if (!a) return;
1469
    av_freep(&a->coeff);
1470
    a->length=0;
1471
    av_free(a);
1472
}
1473

    
1474
void sws_freeFilter(SwsFilter *filter)
1475
{
1476
    if (!filter) return;
1477

    
1478
    if (filter->lumH) sws_freeVec(filter->lumH);
1479
    if (filter->lumV) sws_freeVec(filter->lumV);
1480
    if (filter->chrH) sws_freeVec(filter->chrH);
1481
    if (filter->chrV) sws_freeVec(filter->chrV);
1482
    av_free(filter);
1483
}
1484

    
1485
void sws_freeContext(SwsContext *c)
1486
{
1487
    int i;
1488
    if (!c) return;
1489

    
1490
    if (c->lumPixBuf) {
1491
        for (i=0; i<c->vLumBufSize; i++)
1492
            av_freep(&c->lumPixBuf[i]);
1493
        av_freep(&c->lumPixBuf);
1494
    }
1495

    
1496
    if (c->chrPixBuf) {
1497
        for (i=0; i<c->vChrBufSize; i++)
1498
            av_freep(&c->chrPixBuf[i]);
1499
        av_freep(&c->chrPixBuf);
1500
    }
1501

    
1502
    if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {
1503
        for (i=0; i<c->vLumBufSize; i++)
1504
            av_freep(&c->alpPixBuf[i]);
1505
        av_freep(&c->alpPixBuf);
1506
    }
1507

    
1508
    av_freep(&c->vLumFilter);
1509
    av_freep(&c->vChrFilter);
1510
    av_freep(&c->hLumFilter);
1511
    av_freep(&c->hChrFilter);
1512
#if HAVE_ALTIVEC
1513
    av_freep(&c->vYCoeffsBank);
1514
    av_freep(&c->vCCoeffsBank);
1515
#endif
1516

    
1517
    av_freep(&c->vLumFilterPos);
1518
    av_freep(&c->vChrFilterPos);
1519
    av_freep(&c->hLumFilterPos);
1520
    av_freep(&c->hChrFilterPos);
1521

    
1522
#if ARCH_X86
1523
#ifdef MAP_ANONYMOUS
1524
    if (c->lumMmx2FilterCode) munmap(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize);
1525
    if (c->chrMmx2FilterCode) munmap(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize);
1526
#elif HAVE_VIRTUALALLOC
1527
    if (c->lumMmx2FilterCode) VirtualFree(c->lumMmx2FilterCode, 0, MEM_RELEASE);
1528
    if (c->chrMmx2FilterCode) VirtualFree(c->chrMmx2FilterCode, 0, MEM_RELEASE);
1529
#else
1530
    av_free(c->lumMmx2FilterCode);
1531
    av_free(c->chrMmx2FilterCode);
1532
#endif
1533
    c->lumMmx2FilterCode=NULL;
1534
    c->chrMmx2FilterCode=NULL;
1535
#endif /* ARCH_X86 */
1536

    
1537
    av_freep(&c->yuvTable);
1538

    
1539
    av_free(c);
1540
}
1541

    
1542
struct SwsContext *sws_getCachedContext(struct SwsContext *context,
1543
                                        int srcW, int srcH, enum PixelFormat srcFormat,
1544
                                        int dstW, int dstH, enum PixelFormat dstFormat, int flags,
1545
                                        SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
1546
{
1547
    static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};
1548

    
1549
    if (!param)
1550
        param = default_param;
1551

    
1552
    flags = update_flags_cpu(flags);
1553

    
1554
    if (context &&
1555
        (context->srcW      != srcW      ||
1556
         context->srcH      != srcH      ||
1557
         context->srcFormat != srcFormat ||
1558
         context->dstW      != dstW      ||
1559
         context->dstH      != dstH      ||
1560
         context->dstFormat != dstFormat ||
1561
         context->flags     != flags     ||
1562
         context->param[0]  != param[0]  ||
1563
         context->param[1]  != param[1])) {
1564
        sws_freeContext(context);
1565
        context = NULL;
1566
    }
1567

    
1568
    if (!context) {
1569
        if (!(context = sws_alloc_context()))
1570
            return NULL;
1571
        context->srcW      = srcW;
1572
        context->srcH      = srcH;
1573
        context->srcFormat = srcFormat;
1574
        context->dstFormat = dstFormat;
1575
        context->flags     = flags;
1576
        context->param[0]  = param[0];
1577
        context->param[1]  = param[1];
1578
        if (sws_init_context(context, srcFilter, dstFilter) < 0) {
1579
            sws_freeContext(context);
1580
            return NULL;
1581
        }
1582
    }
1583
    return context;
1584
}
1585