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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.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * 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
34
#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_YUV410P     \
85
        || (x)==PIX_FMT_YUV440P     \
86
        || (x)==PIX_FMT_NV12        \
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        || (x)==PIX_FMT_NV21        \
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        || (x)==PIX_FMT_GRAY16BE    \
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        || (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     \
93
        || (x)==PIX_FMT_YUVJ420P    \
94
        || (x)==PIX_FMT_YUVJ422P    \
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        || (x)==PIX_FMT_YUVJ440P    \
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        || (x)==PIX_FMT_YUVJ444P    \
97
        || (x)==PIX_FMT_PAL8        \
98
        || (x)==PIX_FMT_BGR8        \
99
        || (x)==PIX_FMT_RGB8        \
100
        || (x)==PIX_FMT_BGR4_BYTE   \
101
        || (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   \
111
    )
112

    
113
int sws_isSupportedInput(enum PixelFormat pix_fmt)
114
{
115
    return isSupportedIn(pix_fmt);
116
}
117

    
118
#define isSupportedOut(x)   (       \
119
           (x)==PIX_FMT_YUV420P     \
120
        || (x)==PIX_FMT_YUVA420P    \
121
        || (x)==PIX_FMT_YUYV422     \
122
        || (x)==PIX_FMT_UYVY422     \
123
        || (x)==PIX_FMT_YUV444P     \
124
        || (x)==PIX_FMT_YUV422P     \
125
        || (x)==PIX_FMT_YUV411P     \
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        || (x)==PIX_FMT_YUVJ420P    \
127
        || (x)==PIX_FMT_YUVJ422P    \
128
        || (x)==PIX_FMT_YUVJ440P    \
129
        || (x)==PIX_FMT_YUVJ444P    \
130
        || isAnyRGB(x)              \
131
        || (x)==PIX_FMT_NV12        \
132
        || (x)==PIX_FMT_NV21        \
133
        || (x)==PIX_FMT_GRAY16BE    \
134
        || (x)==PIX_FMT_GRAY16LE    \
135
        || (x)==PIX_FMT_GRAY8       \
136
        || (x)==PIX_FMT_YUV410P     \
137
        || (x)==PIX_FMT_YUV440P     \
138
        || (x)==PIX_FMT_YUV420P16LE   \
139
        || (x)==PIX_FMT_YUV422P16LE   \
140
        || (x)==PIX_FMT_YUV444P16LE   \
141
        || (x)==PIX_FMT_YUV420P16BE   \
142
        || (x)==PIX_FMT_YUV422P16BE   \
143
        || (x)==PIX_FMT_YUV444P16BE   \
144
    )
145

    
146
int sws_isSupportedOutput(enum PixelFormat pix_fmt)
147
{
148
    return isSupportedOut(pix_fmt);
149
}
150

    
151
extern const int32_t ff_yuv2rgb_coeffs[8][4];
152

    
153
const char *sws_format_name(enum PixelFormat format)
154
{
155
    if ((unsigned)format < PIX_FMT_NB && av_pix_fmt_descriptors[format].name)
156
        return av_pix_fmt_descriptors[format].name;
157
    else
158
        return "Unknown format";
159
}
160

    
161
static double getSplineCoeff(double a, double b, double c, double d, double dist)
162
{
163
//    printf("%f %f %f %f %f\n", a,b,c,d,dist);
164
    if (dist<=1.0) return ((d*dist + c)*dist + b)*dist +a;
165
    else           return getSplineCoeff(        0.0,
166
                                          b+ 2.0*c + 3.0*d,
167
                                                 c + 3.0*d,
168
                                         -b- 3.0*c - 6.0*d,
169
                                         dist-1.0);
170
}
171

    
172
static int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,
173
                      int srcW, int dstW, int filterAlign, int one, int flags,
174
                      SwsVector *srcFilter, SwsVector *dstFilter, double param[2])
175
{
176
    int i;
177
    int filterSize;
178
    int filter2Size;
179
    int minFilterSize;
180
    int64_t *filter=NULL;
181
    int64_t *filter2=NULL;
182
    const int64_t fone= 1LL<<54;
183
    int ret= -1;
184
#if ARCH_X86
185
    if (flags & SWS_CPU_CAPS_MMX)
186
        __asm__ volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions)
187
#endif
188

    
189
    // NOTE: the +1 is for the MMX scaler which reads over the end
190
    FF_ALLOC_OR_GOTO(NULL, *filterPos, (dstW+1)*sizeof(int16_t), fail);
191

    
192
    if (FFABS(xInc - 0x10000) <10) { // unscaled
193
        int i;
194
        filterSize= 1;
195
        FF_ALLOCZ_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
196

    
197
        for (i=0; i<dstW; i++) {
198
            filter[i*filterSize]= fone;
199
            (*filterPos)[i]=i;
200
        }
201

    
202
    } else if (flags&SWS_POINT) { // lame looking point sampling mode
203
        int i;
204
        int xDstInSrc;
205
        filterSize= 1;
206
        FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
207

    
208
        xDstInSrc= xInc/2 - 0x8000;
209
        for (i=0; i<dstW; i++) {
210
            int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
211

    
212
            (*filterPos)[i]= xx;
213
            filter[i]= fone;
214
            xDstInSrc+= xInc;
215
        }
216
    } else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) { // bilinear upscale
217
        int i;
218
        int xDstInSrc;
219
        filterSize= 2;
220
        FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
221

    
222
        xDstInSrc= xInc/2 - 0x8000;
223
        for (i=0; i<dstW; i++) {
224
            int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
225
            int j;
226

    
227
            (*filterPos)[i]= xx;
228
            //bilinear upscale / linear interpolate / area averaging
229
            for (j=0; j<filterSize; j++) {
230
                int64_t coeff= fone - FFABS((xx<<16) - xDstInSrc)*(fone>>16);
231
                if (coeff<0) coeff=0;
232
                filter[i*filterSize + j]= coeff;
233
                xx++;
234
            }
235
            xDstInSrc+= xInc;
236
        }
237
    } else {
238
        int xDstInSrc;
239
        int sizeFactor;
240

    
241
        if      (flags&SWS_BICUBIC)      sizeFactor=  4;
242
        else if (flags&SWS_X)            sizeFactor=  8;
243
        else if (flags&SWS_AREA)         sizeFactor=  1; //downscale only, for upscale it is bilinear
244
        else if (flags&SWS_GAUSS)        sizeFactor=  8;   // infinite ;)
245
        else if (flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? ceil(2*param[0]) : 6;
246
        else if (flags&SWS_SINC)         sizeFactor= 20; // infinite ;)
247
        else if (flags&SWS_SPLINE)       sizeFactor= 20;  // infinite ;)
248
        else if (flags&SWS_BILINEAR)     sizeFactor=  2;
249
        else {
250
            sizeFactor= 0; //GCC warning killer
251
            assert(0);
252
        }
253

    
254
        if (xInc <= 1<<16)      filterSize= 1 + sizeFactor; // upscale
255
        else                    filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW;
256

    
257
        if (filterSize > srcW-2) filterSize=srcW-2;
258

    
259
        FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
260

    
261
        xDstInSrc= xInc - 0x10000;
262
        for (i=0; i<dstW; i++) {
263
            int xx= (xDstInSrc - ((filterSize-2)<<16)) / (1<<17);
264
            int j;
265
            (*filterPos)[i]= xx;
266
            for (j=0; j<filterSize; j++) {
267
                int64_t d= ((int64_t)FFABS((xx<<17) - xDstInSrc))<<13;
268
                double floatd;
269
                int64_t coeff;
270

    
271
                if (xInc > 1<<16)
272
                    d= d*dstW/srcW;
273
                floatd= d * (1.0/(1<<30));
274

    
275
                if (flags & SWS_BICUBIC) {
276
                    int64_t B= (param[0] != SWS_PARAM_DEFAULT ? param[0] :   0) * (1<<24);
277
                    int64_t C= (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1<<24);
278
                    int64_t dd = ( d*d)>>30;
279
                    int64_t ddd= (dd*d)>>30;
280

    
281
                    if      (d < 1LL<<30)
282
                        coeff = (12*(1<<24)-9*B-6*C)*ddd + (-18*(1<<24)+12*B+6*C)*dd + (6*(1<<24)-2*B)*(1<<30);
283
                    else if (d < 1LL<<31)
284
                        coeff = (-B-6*C)*ddd + (6*B+30*C)*dd + (-12*B-48*C)*d + (8*B+24*C)*(1<<30);
285
                    else
286
                        coeff=0.0;
287
                    coeff *= fone>>(30+24);
288
                }
289
/*                else if (flags & SWS_X) {
290
                    double p= param ? param*0.01 : 0.3;
291
                    coeff = d ? sin(d*M_PI)/(d*M_PI) : 1.0;
292
                    coeff*= pow(2.0, - p*d*d);
293
                }*/
294
                else if (flags & SWS_X) {
295
                    double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
296
                    double c;
297

    
298
                    if (floatd<1.0)
299
                        c = cos(floatd*M_PI);
300
                    else
301
                        c=-1.0;
302
                    if (c<0.0)      c= -pow(-c, A);
303
                    else            c=  pow( c, A);
304
                    coeff= (c*0.5 + 0.5)*fone;
305
                } else if (flags & SWS_AREA) {
306
                    int64_t d2= d - (1<<29);
307
                    if      (d2*xInc < -(1LL<<(29+16))) coeff= 1.0 * (1LL<<(30+16));
308
                    else if (d2*xInc <  (1LL<<(29+16))) coeff= -d2*xInc + (1LL<<(29+16));
309
                    else coeff=0.0;
310
                    coeff *= fone>>(30+16);
311
                } else if (flags & SWS_GAUSS) {
312
                    double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
313
                    coeff = (pow(2.0, - p*floatd*floatd))*fone;
314
                } else if (flags & SWS_SINC) {
315
                    coeff = (d ? sin(floatd*M_PI)/(floatd*M_PI) : 1.0)*fone;
316
                } else if (flags & SWS_LANCZOS) {
317
                    double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
318
                    coeff = (d ? sin(floatd*M_PI)*sin(floatd*M_PI/p)/(floatd*floatd*M_PI*M_PI/p) : 1.0)*fone;
319
                    if (floatd>p) coeff=0;
320
                } else if (flags & SWS_BILINEAR) {
321
                    coeff= (1<<30) - d;
322
                    if (coeff<0) coeff=0;
323
                    coeff *= fone >> 30;
324
                } else if (flags & SWS_SPLINE) {
325
                    double p=-2.196152422706632;
326
                    coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, floatd) * fone;
327
                } else {
328
                    coeff= 0.0; //GCC warning killer
329
                    assert(0);
330
                }
331

    
332
                filter[i*filterSize + j]= coeff;
333
                xx++;
334
            }
335
            xDstInSrc+= 2*xInc;
336
        }
337
    }
338

    
339
    /* apply src & dst Filter to filter -> filter2
340
       av_free(filter);
341
    */
342
    assert(filterSize>0);
343
    filter2Size= filterSize;
344
    if (srcFilter) filter2Size+= srcFilter->length - 1;
345
    if (dstFilter) filter2Size+= dstFilter->length - 1;
346
    assert(filter2Size>0);
347
    FF_ALLOCZ_OR_GOTO(NULL, filter2, filter2Size*dstW*sizeof(*filter2), fail);
348

    
349
    for (i=0; i<dstW; i++) {
350
        int j, k;
351

    
352
        if(srcFilter) {
353
            for (k=0; k<srcFilter->length; k++) {
354
                for (j=0; j<filterSize; j++)
355
                    filter2[i*filter2Size + k + j] += srcFilter->coeff[k]*filter[i*filterSize + j];
356
            }
357
        } else {
358
            for (j=0; j<filterSize; j++)
359
                filter2[i*filter2Size + j]= filter[i*filterSize + j];
360
        }
361
        //FIXME dstFilter
362

    
363
        (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;
364
    }
365
    av_freep(&filter);
366

    
367
    /* try to reduce the filter-size (step1 find size and shift left) */
368
    // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).
369
    minFilterSize= 0;
370
    for (i=dstW-1; i>=0; i--) {
371
        int min= filter2Size;
372
        int j;
373
        int64_t cutOff=0.0;
374

    
375
        /* get rid of near zero elements on the left by shifting left */
376
        for (j=0; j<filter2Size; j++) {
377
            int k;
378
            cutOff += FFABS(filter2[i*filter2Size]);
379

    
380
            if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;
381

    
382
            /* preserve monotonicity because the core can't handle the filter otherwise */
383
            if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;
384

    
385
            // move filter coefficients left
386
            for (k=1; k<filter2Size; k++)
387
                filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];
388
            filter2[i*filter2Size + k - 1]= 0;
389
            (*filterPos)[i]++;
390
        }
391

    
392
        cutOff=0;
393
        /* count near zeros on the right */
394
        for (j=filter2Size-1; j>0; j--) {
395
            cutOff += FFABS(filter2[i*filter2Size + j]);
396

    
397
            if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;
398
            min--;
399
        }
400

    
401
        if (min>minFilterSize) minFilterSize= min;
402
    }
403

    
404
    if (flags & SWS_CPU_CAPS_ALTIVEC) {
405
        // we can handle the special case 4,
406
        // so we don't want to go to the full 8
407
        if (minFilterSize < 5)
408
            filterAlign = 4;
409

    
410
        // We really don't want to waste our time
411
        // doing useless computation, so fall back on
412
        // the scalar C code for very small filters.
413
        // Vectorizing is worth it only if you have a
414
        // decent-sized vector.
415
        if (minFilterSize < 3)
416
            filterAlign = 1;
417
    }
418

    
419
    if (flags & SWS_CPU_CAPS_MMX) {
420
        // special case for unscaled vertical filtering
421
        if (minFilterSize == 1 && filterAlign == 2)
422
            filterAlign= 1;
423
    }
424

    
425
    assert(minFilterSize > 0);
426
    filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));
427
    assert(filterSize > 0);
428
    filter= av_malloc(filterSize*dstW*sizeof(*filter));
429
    if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter)
430
        goto fail;
431
    *outFilterSize= filterSize;
432

    
433
    if (flags&SWS_PRINT_INFO)
434
        av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);
435
    /* try to reduce the filter-size (step2 reduce it) */
436
    for (i=0; i<dstW; i++) {
437
        int j;
438

    
439
        for (j=0; j<filterSize; j++) {
440
            if (j>=filter2Size) filter[i*filterSize + j]= 0;
441
            else               filter[i*filterSize + j]= filter2[i*filter2Size + j];
442
            if((flags & SWS_BITEXACT) && j>=minFilterSize)
443
                filter[i*filterSize + j]= 0;
444
        }
445
    }
446

    
447
    //FIXME try to align filterPos if possible
448

    
449
    //fix borders
450
    for (i=0; i<dstW; i++) {
451
        int j;
452
        if ((*filterPos)[i] < 0) {
453
            // move filter coefficients left to compensate for filterPos
454
            for (j=1; j<filterSize; j++) {
455
                int left= FFMAX(j + (*filterPos)[i], 0);
456
                filter[i*filterSize + left] += filter[i*filterSize + j];
457
                filter[i*filterSize + j]=0;
458
            }
459
            (*filterPos)[i]= 0;
460
        }
461

    
462
        if ((*filterPos)[i] + filterSize > srcW) {
463
            int shift= (*filterPos)[i] + filterSize - srcW;
464
            // move filter coefficients right to compensate for filterPos
465
            for (j=filterSize-2; j>=0; j--) {
466
                int right= FFMIN(j + shift, filterSize-1);
467
                filter[i*filterSize +right] += filter[i*filterSize +j];
468
                filter[i*filterSize +j]=0;
469
            }
470
            (*filterPos)[i]= srcW - filterSize;
471
        }
472
    }
473

    
474
    // Note the +1 is for the MMX scaler which reads over the end
475
    /* align at 16 for AltiVec (needed by hScale_altivec_real) */
476
    FF_ALLOCZ_OR_GOTO(NULL, *outFilter, *outFilterSize*(dstW+1)*sizeof(int16_t), fail);
477

    
478
    /* normalize & store in outFilter */
479
    for (i=0; i<dstW; i++) {
480
        int j;
481
        int64_t error=0;
482
        int64_t sum=0;
483

    
484
        for (j=0; j<filterSize; j++) {
485
            sum+= filter[i*filterSize + j];
486
        }
487
        sum= (sum + one/2)/ one;
488
        for (j=0; j<*outFilterSize; j++) {
489
            int64_t v= filter[i*filterSize + j] + error;
490
            int intV= ROUNDED_DIV(v, sum);
491
            (*outFilter)[i*(*outFilterSize) + j]= intV;
492
            error= v - intV*sum;
493
        }
494
    }
495

    
496
    (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end
497
    for (i=0; i<*outFilterSize; i++) {
498
        int j= dstW*(*outFilterSize);
499
        (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];
500
    }
501

    
502
    ret=0;
503
fail:
504
    av_free(filter);
505
    av_free(filter2);
506
    return ret;
507
}
508

    
509
#if ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT)
510
static int initMMX2HScaler(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits)
511
{
512
    uint8_t *fragmentA;
513
    x86_reg imm8OfPShufW1A;
514
    x86_reg imm8OfPShufW2A;
515
    x86_reg fragmentLengthA;
516
    uint8_t *fragmentB;
517
    x86_reg imm8OfPShufW1B;
518
    x86_reg imm8OfPShufW2B;
519
    x86_reg fragmentLengthB;
520
    int fragmentPos;
521

    
522
    int xpos, i;
523

    
524
    // create an optimized horizontal scaling routine
525
    /* This scaler is made of runtime-generated MMX2 code using specially
526
     * tuned pshufw instructions. For every four output pixels, if four
527
     * input pixels are enough for the fast bilinear scaling, then a chunk
528
     * of fragmentB is used. If five input pixels are needed, then a chunk
529
     * of fragmentA is used.
530
     */
531

    
532
    //code fragment
533

    
534
    __asm__ volatile(
535
        "jmp                         9f                 \n\t"
536
    // Begin
537
        "0:                                             \n\t"
538
        "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"
539
        "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"
540
        "movd   1(%%"REG_c", %%"REG_S"), %%mm1          \n\t"
541
        "punpcklbw                %%mm7, %%mm1          \n\t"
542
        "punpcklbw                %%mm7, %%mm0          \n\t"
543
        "pshufw                   $0xFF, %%mm1, %%mm1   \n\t"
544
        "1:                                             \n\t"
545
        "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"
546
        "2:                                             \n\t"
547
        "psubw                    %%mm1, %%mm0          \n\t"
548
        "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"
549
        "pmullw                   %%mm3, %%mm0          \n\t"
550
        "psllw                       $7, %%mm1          \n\t"
551
        "paddw                    %%mm1, %%mm0          \n\t"
552

    
553
        "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"
554

    
555
        "add                         $8, %%"REG_a"      \n\t"
556
    // End
557
        "9:                                             \n\t"
558
//        "int $3                                         \n\t"
559
        "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"
560
        "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"
561
        "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"
562
        "dec                         %1                 \n\t"
563
        "dec                         %2                 \n\t"
564
        "sub                         %0, %1             \n\t"
565
        "sub                         %0, %2             \n\t"
566
        "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"
567
        "sub                         %0, %3             \n\t"
568

    
569

    
570
        :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),
571
        "=r" (fragmentLengthA)
572
    );
573

    
574
    __asm__ volatile(
575
        "jmp                         9f                 \n\t"
576
    // Begin
577
        "0:                                             \n\t"
578
        "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"
579
        "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"
580
        "punpcklbw                %%mm7, %%mm0          \n\t"
581
        "pshufw                   $0xFF, %%mm0, %%mm1   \n\t"
582
        "1:                                             \n\t"
583
        "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"
584
        "2:                                             \n\t"
585
        "psubw                    %%mm1, %%mm0          \n\t"
586
        "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"
587
        "pmullw                   %%mm3, %%mm0          \n\t"
588
        "psllw                       $7, %%mm1          \n\t"
589
        "paddw                    %%mm1, %%mm0          \n\t"
590

    
591
        "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"
592

    
593
        "add                         $8, %%"REG_a"      \n\t"
594
    // End
595
        "9:                                             \n\t"
596
//        "int                       $3                   \n\t"
597
        "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"
598
        "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"
599
        "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"
600
        "dec                         %1                 \n\t"
601
        "dec                         %2                 \n\t"
602
        "sub                         %0, %1             \n\t"
603
        "sub                         %0, %2             \n\t"
604
        "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"
605
        "sub                         %0, %3             \n\t"
606

    
607

    
608
        :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),
609
        "=r" (fragmentLengthB)
610
    );
611

    
612
    xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers
613
    fragmentPos=0;
614

    
615
    for (i=0; i<dstW/numSplits; i++) {
616
        int xx=xpos>>16;
617

    
618
        if ((i&3) == 0) {
619
            int a=0;
620
            int b=((xpos+xInc)>>16) - xx;
621
            int c=((xpos+xInc*2)>>16) - xx;
622
            int d=((xpos+xInc*3)>>16) - xx;
623
            int inc                = (d+1<4);
624
            uint8_t *fragment      = (d+1<4) ? fragmentB       : fragmentA;
625
            x86_reg imm8OfPShufW1  = (d+1<4) ? imm8OfPShufW1B  : imm8OfPShufW1A;
626
            x86_reg imm8OfPShufW2  = (d+1<4) ? imm8OfPShufW2B  : imm8OfPShufW2A;
627
            x86_reg fragmentLength = (d+1<4) ? fragmentLengthB : fragmentLengthA;
628
            int maxShift= 3-(d+inc);
629
            int shift=0;
630

    
631
            if (filterCode) {
632
                filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;
633
                filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;
634
                filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;
635
                filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;
636
                filterPos[i/2]= xx;
637

    
638
                memcpy(filterCode + fragmentPos, fragment, fragmentLength);
639

    
640
                filterCode[fragmentPos + imm8OfPShufW1]=
641
                    (a+inc) | ((b+inc)<<2) | ((c+inc)<<4) | ((d+inc)<<6);
642
                filterCode[fragmentPos + imm8OfPShufW2]=
643
                    a | (b<<2) | (c<<4) | (d<<6);
644

    
645
                if (i+4-inc>=dstW) shift=maxShift; //avoid overread
646
                else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align
647

    
648
                if (shift && i>=shift) {
649
                    filterCode[fragmentPos + imm8OfPShufW1]+= 0x55*shift;
650
                    filterCode[fragmentPos + imm8OfPShufW2]+= 0x55*shift;
651
                    filterPos[i/2]-=shift;
652
                }
653
            }
654

    
655
            fragmentPos+= fragmentLength;
656

    
657
            if (filterCode)
658
                filterCode[fragmentPos]= RET;
659
        }
660
        xpos+=xInc;
661
    }
662
    if (filterCode)
663
        filterPos[((i/2)+1)&(~1)]= xpos>>16; // needed to jump to the next part
664

    
665
    return fragmentPos + 1;
666
}
667
#endif /* ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) */
668

    
669
static void getSubSampleFactors(int *h, int *v, enum PixelFormat format)
670
{
671
    *h = av_pix_fmt_descriptors[format].log2_chroma_w;
672
    *v = av_pix_fmt_descriptors[format].log2_chroma_h;
673
}
674

    
675
int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation)
676
{
677
    memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);
678
    memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);
679

    
680
    c->brightness= brightness;
681
    c->contrast  = contrast;
682
    c->saturation= saturation;
683
    c->srcRange  = srcRange;
684
    c->dstRange  = dstRange;
685
    if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
686

    
687
    ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);
688
    //FIXME factorize
689

    
690
#if HAVE_ALTIVEC
691
    if (c->flags & SWS_CPU_CAPS_ALTIVEC)
692
        ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness, contrast, saturation);
693
#endif
694
    return 0;
695
}
696

    
697
int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)
698
{
699
    if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
700

    
701
    *inv_table = c->srcColorspaceTable;
702
    *table     = c->dstColorspaceTable;
703
    *srcRange  = c->srcRange;
704
    *dstRange  = c->dstRange;
705
    *brightness= c->brightness;
706
    *contrast  = c->contrast;
707
    *saturation= c->saturation;
708

    
709
    return 0;
710
}
711

    
712
static int handle_jpeg(enum PixelFormat *format)
713
{
714
    switch (*format) {
715
    case PIX_FMT_YUVJ420P: *format = PIX_FMT_YUV420P; return 1;
716
    case PIX_FMT_YUVJ422P: *format = PIX_FMT_YUV422P; return 1;
717
    case PIX_FMT_YUVJ444P: *format = PIX_FMT_YUV444P; return 1;
718
    case PIX_FMT_YUVJ440P: *format = PIX_FMT_YUV440P; return 1;
719
    default:                                          return 0;
720
    }
721
}
722

    
723
SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
724
                           int dstW, int dstH, enum PixelFormat dstFormat, int flags,
725
                           SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
726
{
727
    SwsContext *c;
728
    int i;
729
    int usesVFilter, usesHFilter;
730
    int unscaled;
731
    int srcRange, dstRange;
732
    SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};
733
#if ARCH_X86
734
    if (flags & SWS_CPU_CAPS_MMX)
735
        __asm__ volatile("emms\n\t"::: "memory");
736
#endif
737

    
738
#if !CONFIG_RUNTIME_CPUDETECT //ensure that the flags match the compiled variant if cpudetect is off
739
    flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC|SWS_CPU_CAPS_BFIN);
740
    flags |= ff_hardcodedcpuflags();
741
#endif /* CONFIG_RUNTIME_CPUDETECT */
742
    if (!rgb15to16) sws_rgb2rgb_init(flags);
743

    
744
    unscaled = (srcW == dstW && srcH == dstH);
745

    
746
    srcRange = handle_jpeg(&srcFormat);
747
    dstRange = handle_jpeg(&dstFormat);
748

    
749
    if (!isSupportedIn(srcFormat)) {
750
        av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", sws_format_name(srcFormat));
751
        return NULL;
752
    }
753
    if (!isSupportedOut(dstFormat)) {
754
        av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output pixel format\n", sws_format_name(dstFormat));
755
        return NULL;
756
    }
757

    
758
    i= flags & ( SWS_POINT
759
                |SWS_AREA
760
                |SWS_BILINEAR
761
                |SWS_FAST_BILINEAR
762
                |SWS_BICUBIC
763
                |SWS_X
764
                |SWS_GAUSS
765
                |SWS_LANCZOS
766
                |SWS_SINC
767
                |SWS_SPLINE
768
                |SWS_BICUBLIN);
769
    if(!i || (i & (i-1))) {
770
        av_log(NULL, AV_LOG_ERROR, "swScaler: Exactly one scaler algorithm must be chosen\n");
771
        return NULL;
772
    }
773

    
774
    /* sanity check */
775
    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
776
        av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",
777
               srcW, srcH, dstW, dstH);
778
        return NULL;
779
    }
780
    if(srcW > VOFW || dstW > VOFW) {
781
        av_log(NULL, AV_LOG_ERROR, "swScaler: Compile-time maximum width is "AV_STRINGIFY(VOFW)" change VOF/VOFW and recompile\n");
782
        return NULL;
783
    }
784

    
785
    if (!dstFilter) dstFilter= &dummyFilter;
786
    if (!srcFilter) srcFilter= &dummyFilter;
787

    
788
    FF_ALLOCZ_OR_GOTO(NULL, c, sizeof(SwsContext), fail);
789

    
790
    c->av_class = &sws_context_class;
791
    c->srcW= srcW;
792
    c->srcH= srcH;
793
    c->dstW= dstW;
794
    c->dstH= dstH;
795
    c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;
796
    c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;
797
    c->flags= flags;
798
    c->dstFormat= dstFormat;
799
    c->srcFormat= srcFormat;
800
    c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[dstFormat]);
801
    c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[srcFormat]);
802
    c->vRounder= 4* 0x0001000100010001ULL;
803

    
804
    usesVFilter = (srcFilter->lumV && srcFilter->lumV->length>1) ||
805
                  (srcFilter->chrV && srcFilter->chrV->length>1) ||
806
                  (dstFilter->lumV && dstFilter->lumV->length>1) ||
807
                  (dstFilter->chrV && dstFilter->chrV->length>1);
808
    usesHFilter = (srcFilter->lumH && srcFilter->lumH->length>1) ||
809
                  (srcFilter->chrH && srcFilter->chrH->length>1) ||
810
                  (dstFilter->lumH && dstFilter->lumH->length>1) ||
811
                  (dstFilter->chrH && dstFilter->chrH->length>1);
812

    
813
    getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);
814
    getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);
815

    
816
    // reuse chroma for 2 pixels RGB/BGR unless user wants full chroma interpolation
817
    if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;
818

    
819
    // drop some chroma lines if the user wants it
820
    c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;
821
    c->chrSrcVSubSample+= c->vChrDrop;
822

    
823
    // drop every other pixel for chroma calculation unless user wants full chroma
824
    if (isAnyRGB(srcFormat) && !(flags&SWS_FULL_CHR_H_INP)
825
      && srcFormat!=PIX_FMT_RGB8      && srcFormat!=PIX_FMT_BGR8
826
      && srcFormat!=PIX_FMT_RGB4      && srcFormat!=PIX_FMT_BGR4
827
      && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE
828
      && ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&(SWS_FAST_BILINEAR|SWS_POINT))))
829
        c->chrSrcHSubSample=1;
830

    
831
    if (param) {
832
        c->param[0] = param[0];
833
        c->param[1] = param[1];
834
    } else {
835
        c->param[0] =
836
        c->param[1] = SWS_PARAM_DEFAULT;
837
    }
838

    
839
    // Note the -((-x)>>y) is so that we always round toward +inf.
840
    c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);
841
    c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);
842
    c->chrDstW= -((-dstW) >> c->chrDstHSubSample);
843
    c->chrDstH= -((-dstH) >> c->chrDstVSubSample);
844

    
845
    sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], srcRange, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT] /* FIXME*/, dstRange, 0, 1<<16, 1<<16);
846

    
847
    /* unscaled special cases */
848
    if (unscaled && !usesHFilter && !usesVFilter && (srcRange == dstRange || isAnyRGB(dstFormat))) {
849
        ff_get_unscaled_swscale(c);
850

    
851
        if (c->swScale) {
852
            if (flags&SWS_PRINT_INFO)
853
                av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",
854
                       sws_format_name(srcFormat), sws_format_name(dstFormat));
855
            return c;
856
        }
857
    }
858

    
859
    if (flags & SWS_CPU_CAPS_MMX2) {
860
        c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;
861
        if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR)) {
862
            if (flags&SWS_PRINT_INFO)
863
                av_log(c, AV_LOG_INFO, "output width is not a multiple of 32 -> no MMX2 scaler\n");
864
        }
865
        if (usesHFilter) c->canMMX2BeUsed=0;
866
    }
867
    else
868
        c->canMMX2BeUsed=0;
869

    
870
    c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;
871
    c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;
872

    
873
    // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst
874
    // but only for the FAST_BILINEAR mode otherwise do correct scaling
875
    // n-2 is the last chrominance sample available
876
    // this is not perfect, but no one should notice the difference, the more correct variant
877
    // would be like the vertical one, but that would require some special code for the
878
    // first and last pixel
879
    if (flags&SWS_FAST_BILINEAR) {
880
        if (c->canMMX2BeUsed) {
881
            c->lumXInc+= 20;
882
            c->chrXInc+= 20;
883
        }
884
        //we don't use the x86 asm scaler if MMX is available
885
        else if (flags & SWS_CPU_CAPS_MMX) {
886
            c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;
887
            c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;
888
        }
889
    }
890

    
891
    /* precalculate horizontal scaler filter coefficients */
892
    {
893
#if ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT)
894
// can't downscale !!!
895
        if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR)) {
896
            c->lumMmx2FilterCodeSize = initMMX2HScaler(      dstW, c->lumXInc, NULL, NULL, NULL, 8);
897
            c->chrMmx2FilterCodeSize = initMMX2HScaler(c->chrDstW, c->chrXInc, NULL, NULL, NULL, 4);
898

    
899
#ifdef MAP_ANONYMOUS
900
            c->lumMmx2FilterCode = mmap(NULL, c->lumMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
901
            c->chrMmx2FilterCode = mmap(NULL, c->chrMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
902
#elif HAVE_VIRTUALALLOC
903
            c->lumMmx2FilterCode = VirtualAlloc(NULL, c->lumMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
904
            c->chrMmx2FilterCode = VirtualAlloc(NULL, c->chrMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
905
#else
906
            c->lumMmx2FilterCode = av_malloc(c->lumMmx2FilterCodeSize);
907
            c->chrMmx2FilterCode = av_malloc(c->chrMmx2FilterCodeSize);
908
#endif
909

    
910
            if (!c->lumMmx2FilterCode || !c->chrMmx2FilterCode)
911
                goto fail;
912
            FF_ALLOCZ_OR_GOTO(c, c->hLumFilter   , (dstW        /8+8)*sizeof(int16_t), fail);
913
            FF_ALLOCZ_OR_GOTO(c, c->hChrFilter   , (c->chrDstW  /4+8)*sizeof(int16_t), fail);
914
            FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW      /2/8+8)*sizeof(int32_t), fail);
915
            FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW/2/4+8)*sizeof(int32_t), fail);
916

    
917
            initMMX2HScaler(      dstW, c->lumXInc, c->lumMmx2FilterCode, c->hLumFilter, c->hLumFilterPos, 8);
918
            initMMX2HScaler(c->chrDstW, c->chrXInc, c->chrMmx2FilterCode, c->hChrFilter, c->hChrFilterPos, 4);
919

    
920
#ifdef MAP_ANONYMOUS
921
            mprotect(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize, PROT_EXEC | PROT_READ);
922
            mprotect(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize, PROT_EXEC | PROT_READ);
923
#endif
924
        } else
925
#endif /* ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) */
926
        {
927
            const int filterAlign=
928
                (flags & SWS_CPU_CAPS_MMX) ? 4 :
929
                (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :
930
                1;
931

    
932
            if (initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,
933
                           srcW      ,       dstW, filterAlign, 1<<14,
934
                           (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,
935
                           srcFilter->lumH, dstFilter->lumH, c->param) < 0)
936
                goto fail;
937
            if (initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,
938
                           c->chrSrcW, c->chrDstW, filterAlign, 1<<14,
939
                           (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,
940
                           srcFilter->chrH, dstFilter->chrH, c->param) < 0)
941
                goto fail;
942
        }
943
    } // initialize horizontal stuff
944

    
945
    /* precalculate vertical scaler filter coefficients */
946
    {
947
        const int filterAlign=
948
            (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :
949
            (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :
950
            1;
951

    
952
        if (initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,
953
                       srcH      ,        dstH, filterAlign, (1<<12),
954
                       (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,
955
                       srcFilter->lumV, dstFilter->lumV, c->param) < 0)
956
            goto fail;
957
        if (initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,
958
                       c->chrSrcH, c->chrDstH, filterAlign, (1<<12),
959
                       (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,
960
                       srcFilter->chrV, dstFilter->chrV, c->param) < 0)
961
            goto fail;
962

    
963
#if HAVE_ALTIVEC
964
        FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof (vector signed short)*c->vLumFilterSize*c->dstH, fail);
965
        FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH, fail);
966

    
967
        for (i=0;i<c->vLumFilterSize*c->dstH;i++) {
968
            int j;
969
            short *p = (short *)&c->vYCoeffsBank[i];
970
            for (j=0;j<8;j++)
971
                p[j] = c->vLumFilter[i];
972
        }
973

    
974
        for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {
975
            int j;
976
            short *p = (short *)&c->vCCoeffsBank[i];
977
            for (j=0;j<8;j++)
978
                p[j] = c->vChrFilter[i];
979
        }
980
#endif
981
    }
982

    
983
    // calculate buffer sizes so that they won't run out while handling these damn slices
984
    c->vLumBufSize= c->vLumFilterSize;
985
    c->vChrBufSize= c->vChrFilterSize;
986
    for (i=0; i<dstH; i++) {
987
        int chrI= i*c->chrDstH / dstH;
988
        int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,
989
                           ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));
990

    
991
        nextSlice>>= c->chrSrcVSubSample;
992
        nextSlice<<= c->chrSrcVSubSample;
993
        if (c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)
994
            c->vLumBufSize= nextSlice - c->vLumFilterPos[i];
995
        if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))
996
            c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];
997
    }
998

    
999
    // allocate pixbufs (we use dynamic allocation because otherwise we would need to
1000
    // allocate several megabytes to handle all possible cases)
1001
    FF_ALLOC_OR_GOTO(c, c->lumPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);
1002
    FF_ALLOC_OR_GOTO(c, c->chrPixBuf, c->vChrBufSize*2*sizeof(int16_t*), fail);
1003
    if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat))
1004
        FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);
1005
    //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)
1006
    /* align at 16 bytes for AltiVec */
1007
    for (i=0; i<c->vLumBufSize; i++) {
1008
        FF_ALLOCZ_OR_GOTO(c, c->lumPixBuf[i+c->vLumBufSize], VOF+1, fail);
1009
        c->lumPixBuf[i] = c->lumPixBuf[i+c->vLumBufSize];
1010
    }
1011
    for (i=0; i<c->vChrBufSize; i++) {
1012
        FF_ALLOC_OR_GOTO(c, c->chrPixBuf[i+c->vChrBufSize], (VOF+1)*2, fail);
1013
        c->chrPixBuf[i] = c->chrPixBuf[i+c->vChrBufSize];
1014
    }
1015
    if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf)
1016
        for (i=0; i<c->vLumBufSize; i++) {
1017
            FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf[i+c->vLumBufSize], VOF+1, fail);
1018
            c->alpPixBuf[i] = c->alpPixBuf[i+c->vLumBufSize];
1019
        }
1020

    
1021
    //try to avoid drawing green stuff between the right end and the stride end
1022
    for (i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, (VOF+1)*2);
1023

    
1024
    assert(2*VOFW == VOF);
1025

    
1026
    assert(c->chrDstH <= dstH);
1027

    
1028
    if (flags&SWS_PRINT_INFO) {
1029
        if (flags&SWS_FAST_BILINEAR)
1030
            av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");
1031
        else if (flags&SWS_BILINEAR)
1032
            av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");
1033
        else if (flags&SWS_BICUBIC)
1034
            av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");
1035
        else if (flags&SWS_X)
1036
            av_log(c, AV_LOG_INFO, "Experimental scaler, ");
1037
        else if (flags&SWS_POINT)
1038
            av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");
1039
        else if (flags&SWS_AREA)
1040
            av_log(c, AV_LOG_INFO, "Area Averaging scaler, ");
1041
        else if (flags&SWS_BICUBLIN)
1042
            av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");
1043
        else if (flags&SWS_GAUSS)
1044
            av_log(c, AV_LOG_INFO, "Gaussian scaler, ");
1045
        else if (flags&SWS_SINC)
1046
            av_log(c, AV_LOG_INFO, "Sinc scaler, ");
1047
        else if (flags&SWS_LANCZOS)
1048
            av_log(c, AV_LOG_INFO, "Lanczos scaler, ");
1049
        else if (flags&SWS_SPLINE)
1050
            av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");
1051
        else
1052
            av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");
1053

    
1054
        av_log(c, AV_LOG_INFO, "from %s to %s%s ",
1055
               sws_format_name(srcFormat),
1056
#ifdef DITHER1XBPP
1057
               dstFormat == PIX_FMT_BGR555 || dstFormat == PIX_FMT_BGR565 ||
1058
               dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE ||
1059
               dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE ? "dithered " : "",
1060
#else
1061
               "",
1062
#endif
1063
               sws_format_name(dstFormat));
1064

    
1065
        if (flags & SWS_CPU_CAPS_MMX2)
1066
            av_log(c, AV_LOG_INFO, "using MMX2\n");
1067
        else if (flags & SWS_CPU_CAPS_3DNOW)
1068
            av_log(c, AV_LOG_INFO, "using 3DNOW\n");
1069
        else if (flags & SWS_CPU_CAPS_MMX)
1070
            av_log(c, AV_LOG_INFO, "using MMX\n");
1071
        else if (flags & SWS_CPU_CAPS_ALTIVEC)
1072
            av_log(c, AV_LOG_INFO, "using AltiVec\n");
1073
        else
1074
            av_log(c, AV_LOG_INFO, "using C\n");
1075

    
1076
        if (flags & SWS_CPU_CAPS_MMX) {
1077
            if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))
1078
                av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");
1079
            else {
1080
                if (c->hLumFilterSize==4)
1081
                    av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n");
1082
                else if (c->hLumFilterSize==8)
1083
                    av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n");
1084
                else
1085
                    av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n");
1086

    
1087
                if (c->hChrFilterSize==4)
1088
                    av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n");
1089
                else if (c->hChrFilterSize==8)
1090
                    av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n");
1091
                else
1092
                    av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n");
1093
            }
1094
        } else {
1095
#if ARCH_X86
1096
            av_log(c, AV_LOG_VERBOSE, "using x86 asm scaler for horizontal scaling\n");
1097
#else
1098
            if (flags & SWS_FAST_BILINEAR)
1099
                av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n");
1100
            else
1101
                av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n");
1102
#endif
1103
        }
1104
        if (isPlanarYUV(dstFormat)) {
1105
            if (c->vLumFilterSize==1)
1106
                av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1107
            else
1108
                av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1109
        } else {
1110
            if (c->vLumFilterSize==1 && c->vChrFilterSize==2)
1111
                av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"
1112
                       "      2-tap scaler for vertical chrominance scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1113
            else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)
1114
                av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1115
            else
1116
                av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1117
        }
1118

    
1119
        if (dstFormat==PIX_FMT_BGR24)
1120
            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 converter\n",
1121
                   (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));
1122
        else if (dstFormat==PIX_FMT_RGB32)
1123
            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1124
        else if (dstFormat==PIX_FMT_BGR565)
1125
            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1126
        else if (dstFormat==PIX_FMT_BGR555)
1127
            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1128
        else if (dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE ||
1129
                 dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE)
1130
            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR12 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1131

    
1132
        av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
1133
        av_log(c, AV_LOG_DEBUG, "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1134
               c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
1135
        av_log(c, AV_LOG_DEBUG, "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1136
               c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);
1137
    }
1138

    
1139
    c->swScale= ff_getSwsFunc(c);
1140
    return c;
1141

    
1142
fail:
1143
    sws_freeContext(c);
1144
    return NULL;
1145
}
1146

    
1147
SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
1148
                                float lumaSharpen, float chromaSharpen,
1149
                                float chromaHShift, float chromaVShift,
1150
                                int verbose)
1151
{
1152
    SwsFilter *filter= av_malloc(sizeof(SwsFilter));
1153
    if (!filter)
1154
        return NULL;
1155

    
1156
    if (lumaGBlur!=0.0) {
1157
        filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);
1158
        filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);
1159
    } else {
1160
        filter->lumH= sws_getIdentityVec();
1161
        filter->lumV= sws_getIdentityVec();
1162
    }
1163

    
1164
    if (chromaGBlur!=0.0) {
1165
        filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);
1166
        filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);
1167
    } else {
1168
        filter->chrH= sws_getIdentityVec();
1169
        filter->chrV= sws_getIdentityVec();
1170
    }
1171

    
1172
    if (chromaSharpen!=0.0) {
1173
        SwsVector *id= sws_getIdentityVec();
1174
        sws_scaleVec(filter->chrH, -chromaSharpen);
1175
        sws_scaleVec(filter->chrV, -chromaSharpen);
1176
        sws_addVec(filter->chrH, id);
1177
        sws_addVec(filter->chrV, id);
1178
        sws_freeVec(id);
1179
    }
1180

    
1181
    if (lumaSharpen!=0.0) {
1182
        SwsVector *id= sws_getIdentityVec();
1183
        sws_scaleVec(filter->lumH, -lumaSharpen);
1184
        sws_scaleVec(filter->lumV, -lumaSharpen);
1185
        sws_addVec(filter->lumH, id);
1186
        sws_addVec(filter->lumV, id);
1187
        sws_freeVec(id);
1188
    }
1189

    
1190
    if (chromaHShift != 0.0)
1191
        sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));
1192

    
1193
    if (chromaVShift != 0.0)
1194
        sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));
1195

    
1196
    sws_normalizeVec(filter->chrH, 1.0);
1197
    sws_normalizeVec(filter->chrV, 1.0);
1198
    sws_normalizeVec(filter->lumH, 1.0);
1199
    sws_normalizeVec(filter->lumV, 1.0);
1200

    
1201
    if (verbose) sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);
1202
    if (verbose) sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);
1203

    
1204
    return filter;
1205
}
1206

    
1207
SwsVector *sws_allocVec(int length)
1208
{
1209
    SwsVector *vec = av_malloc(sizeof(SwsVector));
1210
    if (!vec)
1211
        return NULL;
1212
    vec->length = length;
1213
    vec->coeff  = av_malloc(sizeof(double) * length);
1214
    if (!vec->coeff)
1215
        av_freep(&vec);
1216
    return vec;
1217
}
1218

    
1219
SwsVector *sws_getGaussianVec(double variance, double quality)
1220
{
1221
    const int length= (int)(variance*quality + 0.5) | 1;
1222
    int i;
1223
    double middle= (length-1)*0.5;
1224
    SwsVector *vec= sws_allocVec(length);
1225

    
1226
    if (!vec)
1227
        return NULL;
1228

    
1229
    for (i=0; i<length; i++) {
1230
        double dist= i-middle;
1231
        vec->coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*M_PI);
1232
    }
1233

    
1234
    sws_normalizeVec(vec, 1.0);
1235

    
1236
    return vec;
1237
}
1238

    
1239
SwsVector *sws_getConstVec(double c, int length)
1240
{
1241
    int i;
1242
    SwsVector *vec= sws_allocVec(length);
1243

    
1244
    if (!vec)
1245
        return NULL;
1246

    
1247
    for (i=0; i<length; i++)
1248
        vec->coeff[i]= c;
1249

    
1250
    return vec;
1251
}
1252

    
1253
SwsVector *sws_getIdentityVec(void)
1254
{
1255
    return sws_getConstVec(1.0, 1);
1256
}
1257

    
1258
static double sws_dcVec(SwsVector *a)
1259
{
1260
    int i;
1261
    double sum=0;
1262

    
1263
    for (i=0; i<a->length; i++)
1264
        sum+= a->coeff[i];
1265

    
1266
    return sum;
1267
}
1268

    
1269
void sws_scaleVec(SwsVector *a, double scalar)
1270
{
1271
    int i;
1272

    
1273
    for (i=0; i<a->length; i++)
1274
        a->coeff[i]*= scalar;
1275
}
1276

    
1277
void sws_normalizeVec(SwsVector *a, double height)
1278
{
1279
    sws_scaleVec(a, height/sws_dcVec(a));
1280
}
1281

    
1282
static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b)
1283
{
1284
    int length= a->length + b->length - 1;
1285
    int i, j;
1286
    SwsVector *vec= sws_getConstVec(0.0, length);
1287

    
1288
    if (!vec)
1289
        return NULL;
1290

    
1291
    for (i=0; i<a->length; i++) {
1292
        for (j=0; j<b->length; j++) {
1293
            vec->coeff[i+j]+= a->coeff[i]*b->coeff[j];
1294
        }
1295
    }
1296

    
1297
    return vec;
1298
}
1299

    
1300
static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b)
1301
{
1302
    int length= FFMAX(a->length, b->length);
1303
    int i;
1304
    SwsVector *vec= sws_getConstVec(0.0, length);
1305

    
1306
    if (!vec)
1307
        return NULL;
1308

    
1309
    for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
1310
    for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];
1311

    
1312
    return vec;
1313
}
1314

    
1315
static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b)
1316
{
1317
    int length= FFMAX(a->length, b->length);
1318
    int i;
1319
    SwsVector *vec= sws_getConstVec(0.0, length);
1320

    
1321
    if (!vec)
1322
        return NULL;
1323

    
1324
    for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
1325
    for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];
1326

    
1327
    return vec;
1328
}
1329

    
1330
/* shift left / or right if "shift" is negative */
1331
static SwsVector *sws_getShiftedVec(SwsVector *a, int shift)
1332
{
1333
    int length= a->length + FFABS(shift)*2;
1334
    int i;
1335
    SwsVector *vec= sws_getConstVec(0.0, length);
1336

    
1337
    if (!vec)
1338
        return NULL;
1339

    
1340
    for (i=0; i<a->length; i++) {
1341
        vec->coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];
1342
    }
1343

    
1344
    return vec;
1345
}
1346

    
1347
void sws_shiftVec(SwsVector *a, int shift)
1348
{
1349
    SwsVector *shifted= sws_getShiftedVec(a, shift);
1350
    av_free(a->coeff);
1351
    a->coeff= shifted->coeff;
1352
    a->length= shifted->length;
1353
    av_free(shifted);
1354
}
1355

    
1356
void sws_addVec(SwsVector *a, SwsVector *b)
1357
{
1358
    SwsVector *sum= sws_sumVec(a, b);
1359
    av_free(a->coeff);
1360
    a->coeff= sum->coeff;
1361
    a->length= sum->length;
1362
    av_free(sum);
1363
}
1364

    
1365
void sws_subVec(SwsVector *a, SwsVector *b)
1366
{
1367
    SwsVector *diff= sws_diffVec(a, b);
1368
    av_free(a->coeff);
1369
    a->coeff= diff->coeff;
1370
    a->length= diff->length;
1371
    av_free(diff);
1372
}
1373

    
1374
void sws_convVec(SwsVector *a, SwsVector *b)
1375
{
1376
    SwsVector *conv= sws_getConvVec(a, b);
1377
    av_free(a->coeff);
1378
    a->coeff= conv->coeff;
1379
    a->length= conv->length;
1380
    av_free(conv);
1381
}
1382

    
1383
SwsVector *sws_cloneVec(SwsVector *a)
1384
{
1385
    int i;
1386
    SwsVector *vec= sws_allocVec(a->length);
1387

    
1388
    if (!vec)
1389
        return NULL;
1390

    
1391
    for (i=0; i<a->length; i++) vec->coeff[i]= a->coeff[i];
1392

    
1393
    return vec;
1394
}
1395

    
1396
void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)
1397
{
1398
    int i;
1399
    double max=0;
1400
    double min=0;
1401
    double range;
1402

    
1403
    for (i=0; i<a->length; i++)
1404
        if (a->coeff[i]>max) max= a->coeff[i];
1405

    
1406
    for (i=0; i<a->length; i++)
1407
        if (a->coeff[i]<min) min= a->coeff[i];
1408

    
1409
    range= max - min;
1410

    
1411
    for (i=0; i<a->length; i++) {
1412
        int x= (int)((a->coeff[i]-min)*60.0/range +0.5);
1413
        av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);
1414
        for (;x>0; x--) av_log(log_ctx, log_level, " ");
1415
        av_log(log_ctx, log_level, "|\n");
1416
    }
1417
}
1418

    
1419
#if LIBSWSCALE_VERSION_MAJOR < 1
1420
void sws_printVec(SwsVector *a)
1421
{
1422
    sws_printVec2(a, NULL, AV_LOG_DEBUG);
1423
}
1424
#endif
1425

    
1426
void sws_freeVec(SwsVector *a)
1427
{
1428
    if (!a) return;
1429
    av_freep(&a->coeff);
1430
    a->length=0;
1431
    av_free(a);
1432
}
1433

    
1434
void sws_freeFilter(SwsFilter *filter)
1435
{
1436
    if (!filter) return;
1437

    
1438
    if (filter->lumH) sws_freeVec(filter->lumH);
1439
    if (filter->lumV) sws_freeVec(filter->lumV);
1440
    if (filter->chrH) sws_freeVec(filter->chrH);
1441
    if (filter->chrV) sws_freeVec(filter->chrV);
1442
    av_free(filter);
1443
}
1444

    
1445
void sws_freeContext(SwsContext *c)
1446
{
1447
    int i;
1448
    if (!c) return;
1449

    
1450
    if (c->lumPixBuf) {
1451
        for (i=0; i<c->vLumBufSize; i++)
1452
            av_freep(&c->lumPixBuf[i]);
1453
        av_freep(&c->lumPixBuf);
1454
    }
1455

    
1456
    if (c->chrPixBuf) {
1457
        for (i=0; i<c->vChrBufSize; i++)
1458
            av_freep(&c->chrPixBuf[i]);
1459
        av_freep(&c->chrPixBuf);
1460
    }
1461

    
1462
    if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {
1463
        for (i=0; i<c->vLumBufSize; i++)
1464
            av_freep(&c->alpPixBuf[i]);
1465
        av_freep(&c->alpPixBuf);
1466
    }
1467

    
1468
    av_freep(&c->vLumFilter);
1469
    av_freep(&c->vChrFilter);
1470
    av_freep(&c->hLumFilter);
1471
    av_freep(&c->hChrFilter);
1472
#if HAVE_ALTIVEC
1473
    av_freep(&c->vYCoeffsBank);
1474
    av_freep(&c->vCCoeffsBank);
1475
#endif
1476

    
1477
    av_freep(&c->vLumFilterPos);
1478
    av_freep(&c->vChrFilterPos);
1479
    av_freep(&c->hLumFilterPos);
1480
    av_freep(&c->hChrFilterPos);
1481

    
1482
#if ARCH_X86
1483
#ifdef MAP_ANONYMOUS
1484
    if (c->lumMmx2FilterCode) munmap(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize);
1485
    if (c->chrMmx2FilterCode) munmap(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize);
1486
#elif HAVE_VIRTUALALLOC
1487
    if (c->lumMmx2FilterCode) VirtualFree(c->lumMmx2FilterCode, 0, MEM_RELEASE);
1488
    if (c->chrMmx2FilterCode) VirtualFree(c->chrMmx2FilterCode, 0, MEM_RELEASE);
1489
#else
1490
    av_free(c->lumMmx2FilterCode);
1491
    av_free(c->chrMmx2FilterCode);
1492
#endif
1493
    c->lumMmx2FilterCode=NULL;
1494
    c->chrMmx2FilterCode=NULL;
1495
#endif /* ARCH_X86 */
1496

    
1497
    av_freep(&c->yuvTable);
1498

    
1499
    av_free(c);
1500
}
1501

    
1502
struct SwsContext *sws_getCachedContext(struct SwsContext *context,
1503
                                        int srcW, int srcH, enum PixelFormat srcFormat,
1504
                                        int dstW, int dstH, enum PixelFormat dstFormat, int flags,
1505
                                        SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
1506
{
1507
    static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};
1508

    
1509
    if (!param)
1510
        param = default_param;
1511

    
1512
    if (context &&
1513
        (context->srcW      != srcW      ||
1514
         context->srcH      != srcH      ||
1515
         context->srcFormat != srcFormat ||
1516
         context->dstW      != dstW      ||
1517
         context->dstH      != dstH      ||
1518
         context->dstFormat != dstFormat ||
1519
         context->flags     != flags     ||
1520
         context->param[0]  != param[0]  ||
1521
         context->param[1]  != param[1])) {
1522
        sws_freeContext(context);
1523
        context = NULL;
1524
    }
1525

    
1526
    if (!context) {
1527
        return sws_getContext(srcW, srcH, srcFormat,
1528
                              dstW, dstH, dstFormat, flags,
1529
                              srcFilter, dstFilter, param);
1530
    }
1531
    return context;
1532
}
1533