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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
 *
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 * 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
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 * 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/opt.h"
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#include "libavutil/pixdesc.h"
48

    
49
unsigned swscale_version(void)
50
{
51
    return LIBSWSCALE_VERSION_INT;
52
}
53

    
54
const char *swscale_configuration(void)
55
{
56
    return FFMPEG_CONFIGURATION;
57
}
58

    
59
const char *swscale_license(void)
60
{
61
#define LICENSE_PREFIX "libswscale license: "
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    return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
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}
64

    
65
#define RET 0xC3 //near return opcode for x86
66

    
67
#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       \
82
        || (x)==PIX_FMT_RGB565      \
83
        || (x)==PIX_FMT_RGB555      \
84
        || (x)==PIX_FMT_GRAY8       \
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        || (x)==PIX_FMT_Y400A       \
86
        || (x)==PIX_FMT_YUV410P     \
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        || (x)==PIX_FMT_YUV440P     \
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        || (x)==PIX_FMT_NV12        \
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        || (x)==PIX_FMT_NV21        \
90
        || (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     \
95
        || (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    \
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        || (x)==PIX_FMT_PAL8        \
100
        || (x)==PIX_FMT_BGR8        \
101
        || (x)==PIX_FMT_RGB8        \
102
        || (x)==PIX_FMT_BGR4_BYTE   \
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        || (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   \
113
    )
114

    
115
int sws_isSupportedInput(enum PixelFormat pix_fmt)
116
{
117
    return isSupportedIn(pix_fmt);
118
}
119

    
120
#define isSupportedOut(x)   (       \
121
           (x)==PIX_FMT_YUV420P     \
122
        || (x)==PIX_FMT_YUVA420P    \
123
        || (x)==PIX_FMT_YUYV422     \
124
        || (x)==PIX_FMT_UYVY422     \
125
        || (x)==PIX_FMT_YUV444P     \
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        || (x)==PIX_FMT_YUV422P     \
127
        || (x)==PIX_FMT_YUV411P     \
128
        || (x)==PIX_FMT_YUVJ420P    \
129
        || (x)==PIX_FMT_YUVJ422P    \
130
        || (x)==PIX_FMT_YUVJ440P    \
131
        || (x)==PIX_FMT_YUVJ444P    \
132
        || isAnyRGB(x)              \
133
        || (x)==PIX_FMT_NV12        \
134
        || (x)==PIX_FMT_NV21        \
135
        || (x)==PIX_FMT_GRAY16BE    \
136
        || (x)==PIX_FMT_GRAY16LE    \
137
        || (x)==PIX_FMT_GRAY8       \
138
        || (x)==PIX_FMT_YUV410P     \
139
        || (x)==PIX_FMT_YUV440P     \
140
        || (x)==PIX_FMT_YUV420P16LE   \
141
        || (x)==PIX_FMT_YUV422P16LE   \
142
        || (x)==PIX_FMT_YUV444P16LE   \
143
        || (x)==PIX_FMT_YUV420P16BE   \
144
        || (x)==PIX_FMT_YUV422P16BE   \
145
        || (x)==PIX_FMT_YUV444P16BE   \
146
    )
147

    
148
int sws_isSupportedOutput(enum PixelFormat pix_fmt)
149
{
150
    return isSupportedOut(pix_fmt);
151
}
152

    
153
extern const int32_t ff_yuv2rgb_coeffs[8][4];
154

    
155
const char *sws_format_name(enum PixelFormat format)
156
{
157
    if ((unsigned)format < PIX_FMT_NB && av_pix_fmt_descriptors[format].name)
158
        return av_pix_fmt_descriptors[format].name;
159
    else
160
        return "Unknown format";
161
}
162

    
163
static double getSplineCoeff(double a, double b, double c, double d, double dist)
164
{
165
//    printf("%f %f %f %f %f\n", a,b,c,d,dist);
166
    if (dist<=1.0) return ((d*dist + c)*dist + b)*dist +a;
167
    else           return getSplineCoeff(        0.0,
168
                                          b+ 2.0*c + 3.0*d,
169
                                                 c + 3.0*d,
170
                                         -b- 3.0*c - 6.0*d,
171
                                         dist-1.0);
172
}
173

    
174
static int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,
175
                      int srcW, int dstW, int filterAlign, int one, int flags,
176
                      SwsVector *srcFilter, SwsVector *dstFilter, double param[2])
177
{
178
    int i;
179
    int filterSize;
180
    int filter2Size;
181
    int minFilterSize;
182
    int64_t *filter=NULL;
183
    int64_t *filter2=NULL;
184
    const int64_t fone= 1LL<<54;
185
    int ret= -1;
186
#if ARCH_X86
187
    if (flags & SWS_CPU_CAPS_MMX)
188
        __asm__ volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions)
189
#endif
190

    
191
    // NOTE: the +1 is for the MMX scaler which reads over the end
192
    FF_ALLOC_OR_GOTO(NULL, *filterPos, (dstW+1)*sizeof(int16_t), fail);
193

    
194
    if (FFABS(xInc - 0x10000) <10) { // unscaled
195
        int i;
196
        filterSize= 1;
197
        FF_ALLOCZ_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
198

    
199
        for (i=0; i<dstW; i++) {
200
            filter[i*filterSize]= fone;
201
            (*filterPos)[i]=i;
202
        }
203

    
204
    } else if (flags&SWS_POINT) { // lame looking point sampling mode
205
        int i;
206
        int xDstInSrc;
207
        filterSize= 1;
208
        FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
209

    
210
        xDstInSrc= xInc/2 - 0x8000;
211
        for (i=0; i<dstW; i++) {
212
            int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
213

    
214
            (*filterPos)[i]= xx;
215
            filter[i]= fone;
216
            xDstInSrc+= xInc;
217
        }
218
    } else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) { // bilinear upscale
219
        int i;
220
        int xDstInSrc;
221
        filterSize= 2;
222
        FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
223

    
224
        xDstInSrc= xInc/2 - 0x8000;
225
        for (i=0; i<dstW; i++) {
226
            int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
227
            int j;
228

    
229
            (*filterPos)[i]= xx;
230
            //bilinear upscale / linear interpolate / area averaging
231
            for (j=0; j<filterSize; j++) {
232
                int64_t coeff= fone - FFABS((xx<<16) - xDstInSrc)*(fone>>16);
233
                if (coeff<0) coeff=0;
234
                filter[i*filterSize + j]= coeff;
235
                xx++;
236
            }
237
            xDstInSrc+= xInc;
238
        }
239
    } else {
240
        int xDstInSrc;
241
        int sizeFactor;
242

    
243
        if      (flags&SWS_BICUBIC)      sizeFactor=  4;
244
        else if (flags&SWS_X)            sizeFactor=  8;
245
        else if (flags&SWS_AREA)         sizeFactor=  1; //downscale only, for upscale it is bilinear
246
        else if (flags&SWS_GAUSS)        sizeFactor=  8;   // infinite ;)
247
        else if (flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? ceil(2*param[0]) : 6;
248
        else if (flags&SWS_SINC)         sizeFactor= 20; // infinite ;)
249
        else if (flags&SWS_SPLINE)       sizeFactor= 20;  // infinite ;)
250
        else if (flags&SWS_BILINEAR)     sizeFactor=  2;
251
        else {
252
            sizeFactor= 0; //GCC warning killer
253
            assert(0);
254
        }
255

    
256
        if (xInc <= 1<<16)      filterSize= 1 + sizeFactor; // upscale
257
        else                    filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW;
258

    
259
        if (filterSize > srcW-2) filterSize=srcW-2;
260

    
261
        FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
262

    
263
        xDstInSrc= xInc - 0x10000;
264
        for (i=0; i<dstW; i++) {
265
            int xx= (xDstInSrc - ((filterSize-2)<<16)) / (1<<17);
266
            int j;
267
            (*filterPos)[i]= xx;
268
            for (j=0; j<filterSize; j++) {
269
                int64_t d= ((int64_t)FFABS((xx<<17) - xDstInSrc))<<13;
270
                double floatd;
271
                int64_t coeff;
272

    
273
                if (xInc > 1<<16)
274
                    d= d*dstW/srcW;
275
                floatd= d * (1.0/(1<<30));
276

    
277
                if (flags & SWS_BICUBIC) {
278
                    int64_t B= (param[0] != SWS_PARAM_DEFAULT ? param[0] :   0) * (1<<24);
279
                    int64_t C= (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1<<24);
280
                    int64_t dd = ( d*d)>>30;
281
                    int64_t ddd= (dd*d)>>30;
282

    
283
                    if      (d < 1LL<<30)
284
                        coeff = (12*(1<<24)-9*B-6*C)*ddd + (-18*(1<<24)+12*B+6*C)*dd + (6*(1<<24)-2*B)*(1<<30);
285
                    else if (d < 1LL<<31)
286
                        coeff = (-B-6*C)*ddd + (6*B+30*C)*dd + (-12*B-48*C)*d + (8*B+24*C)*(1<<30);
287
                    else
288
                        coeff=0.0;
289
                    coeff *= fone>>(30+24);
290
                }
291
/*                else if (flags & SWS_X) {
292
                    double p= param ? param*0.01 : 0.3;
293
                    coeff = d ? sin(d*M_PI)/(d*M_PI) : 1.0;
294
                    coeff*= pow(2.0, - p*d*d);
295
                }*/
296
                else if (flags & SWS_X) {
297
                    double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
298
                    double c;
299

    
300
                    if (floatd<1.0)
301
                        c = cos(floatd*M_PI);
302
                    else
303
                        c=-1.0;
304
                    if (c<0.0)      c= -pow(-c, A);
305
                    else            c=  pow( c, A);
306
                    coeff= (c*0.5 + 0.5)*fone;
307
                } else if (flags & SWS_AREA) {
308
                    int64_t d2= d - (1<<29);
309
                    if      (d2*xInc < -(1LL<<(29+16))) coeff= 1.0 * (1LL<<(30+16));
310
                    else if (d2*xInc <  (1LL<<(29+16))) coeff= -d2*xInc + (1LL<<(29+16));
311
                    else coeff=0.0;
312
                    coeff *= fone>>(30+16);
313
                } else if (flags & SWS_GAUSS) {
314
                    double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
315
                    coeff = (pow(2.0, - p*floatd*floatd))*fone;
316
                } else if (flags & SWS_SINC) {
317
                    coeff = (d ? sin(floatd*M_PI)/(floatd*M_PI) : 1.0)*fone;
318
                } else if (flags & SWS_LANCZOS) {
319
                    double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
320
                    coeff = (d ? sin(floatd*M_PI)*sin(floatd*M_PI/p)/(floatd*floatd*M_PI*M_PI/p) : 1.0)*fone;
321
                    if (floatd>p) coeff=0;
322
                } else if (flags & SWS_BILINEAR) {
323
                    coeff= (1<<30) - d;
324
                    if (coeff<0) coeff=0;
325
                    coeff *= fone >> 30;
326
                } else if (flags & SWS_SPLINE) {
327
                    double p=-2.196152422706632;
328
                    coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, floatd) * fone;
329
                } else {
330
                    coeff= 0.0; //GCC warning killer
331
                    assert(0);
332
                }
333

    
334
                filter[i*filterSize + j]= coeff;
335
                xx++;
336
            }
337
            xDstInSrc+= 2*xInc;
338
        }
339
    }
340

    
341
    /* apply src & dst Filter to filter -> filter2
342
       av_free(filter);
343
    */
344
    assert(filterSize>0);
345
    filter2Size= filterSize;
346
    if (srcFilter) filter2Size+= srcFilter->length - 1;
347
    if (dstFilter) filter2Size+= dstFilter->length - 1;
348
    assert(filter2Size>0);
349
    FF_ALLOCZ_OR_GOTO(NULL, filter2, filter2Size*dstW*sizeof(*filter2), fail);
350

    
351
    for (i=0; i<dstW; i++) {
352
        int j, k;
353

    
354
        if(srcFilter) {
355
            for (k=0; k<srcFilter->length; k++) {
356
                for (j=0; j<filterSize; j++)
357
                    filter2[i*filter2Size + k + j] += srcFilter->coeff[k]*filter[i*filterSize + j];
358
            }
359
        } else {
360
            for (j=0; j<filterSize; j++)
361
                filter2[i*filter2Size + j]= filter[i*filterSize + j];
362
        }
363
        //FIXME dstFilter
364

    
365
        (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;
366
    }
367
    av_freep(&filter);
368

    
369
    /* try to reduce the filter-size (step1 find size and shift left) */
370
    // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).
371
    minFilterSize= 0;
372
    for (i=dstW-1; i>=0; i--) {
373
        int min= filter2Size;
374
        int j;
375
        int64_t cutOff=0.0;
376

    
377
        /* get rid of near zero elements on the left by shifting left */
378
        for (j=0; j<filter2Size; j++) {
379
            int k;
380
            cutOff += FFABS(filter2[i*filter2Size]);
381

    
382
            if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;
383

    
384
            /* preserve monotonicity because the core can't handle the filter otherwise */
385
            if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;
386

    
387
            // move filter coefficients left
388
            for (k=1; k<filter2Size; k++)
389
                filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];
390
            filter2[i*filter2Size + k - 1]= 0;
391
            (*filterPos)[i]++;
392
        }
393

    
394
        cutOff=0;
395
        /* count near zeros on the right */
396
        for (j=filter2Size-1; j>0; j--) {
397
            cutOff += FFABS(filter2[i*filter2Size + j]);
398

    
399
            if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;
400
            min--;
401
        }
402

    
403
        if (min>minFilterSize) minFilterSize= min;
404
    }
405

    
406
    if (flags & SWS_CPU_CAPS_ALTIVEC) {
407
        // we can handle the special case 4,
408
        // so we don't want to go to the full 8
409
        if (minFilterSize < 5)
410
            filterAlign = 4;
411

    
412
        // We really don't want to waste our time
413
        // doing useless computation, so fall back on
414
        // the scalar C code for very small filters.
415
        // Vectorizing is worth it only if you have a
416
        // decent-sized vector.
417
        if (minFilterSize < 3)
418
            filterAlign = 1;
419
    }
420

    
421
    if (flags & SWS_CPU_CAPS_MMX) {
422
        // special case for unscaled vertical filtering
423
        if (minFilterSize == 1 && filterAlign == 2)
424
            filterAlign= 1;
425
    }
426

    
427
    assert(minFilterSize > 0);
428
    filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));
429
    assert(filterSize > 0);
430
    filter= av_malloc(filterSize*dstW*sizeof(*filter));
431
    if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter)
432
        goto fail;
433
    *outFilterSize= filterSize;
434

    
435
    if (flags&SWS_PRINT_INFO)
436
        av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);
437
    /* try to reduce the filter-size (step2 reduce it) */
438
    for (i=0; i<dstW; i++) {
439
        int j;
440

    
441
        for (j=0; j<filterSize; j++) {
442
            if (j>=filter2Size) filter[i*filterSize + j]= 0;
443
            else               filter[i*filterSize + j]= filter2[i*filter2Size + j];
444
            if((flags & SWS_BITEXACT) && j>=minFilterSize)
445
                filter[i*filterSize + j]= 0;
446
        }
447
    }
448

    
449
    //FIXME try to align filterPos if possible
450

    
451
    //fix borders
452
    for (i=0; i<dstW; i++) {
453
        int j;
454
        if ((*filterPos)[i] < 0) {
455
            // move filter coefficients left to compensate for filterPos
456
            for (j=1; j<filterSize; j++) {
457
                int left= FFMAX(j + (*filterPos)[i], 0);
458
                filter[i*filterSize + left] += filter[i*filterSize + j];
459
                filter[i*filterSize + j]=0;
460
            }
461
            (*filterPos)[i]= 0;
462
        }
463

    
464
        if ((*filterPos)[i] + filterSize > srcW) {
465
            int shift= (*filterPos)[i] + filterSize - srcW;
466
            // move filter coefficients right to compensate for filterPos
467
            for (j=filterSize-2; j>=0; j--) {
468
                int right= FFMIN(j + shift, filterSize-1);
469
                filter[i*filterSize +right] += filter[i*filterSize +j];
470
                filter[i*filterSize +j]=0;
471
            }
472
            (*filterPos)[i]= srcW - filterSize;
473
        }
474
    }
475

    
476
    // Note the +1 is for the MMX scaler which reads over the end
477
    /* align at 16 for AltiVec (needed by hScale_altivec_real) */
478
    FF_ALLOCZ_OR_GOTO(NULL, *outFilter, *outFilterSize*(dstW+1)*sizeof(int16_t), fail);
479

    
480
    /* normalize & store in outFilter */
481
    for (i=0; i<dstW; i++) {
482
        int j;
483
        int64_t error=0;
484
        int64_t sum=0;
485

    
486
        for (j=0; j<filterSize; j++) {
487
            sum+= filter[i*filterSize + j];
488
        }
489
        sum= (sum + one/2)/ one;
490
        for (j=0; j<*outFilterSize; j++) {
491
            int64_t v= filter[i*filterSize + j] + error;
492
            int intV= ROUNDED_DIV(v, sum);
493
            (*outFilter)[i*(*outFilterSize) + j]= intV;
494
            error= v - intV*sum;
495
        }
496
    }
497

    
498
    (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end
499
    for (i=0; i<*outFilterSize; i++) {
500
        int j= dstW*(*outFilterSize);
501
        (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];
502
    }
503

    
504
    ret=0;
505
fail:
506
    av_free(filter);
507
    av_free(filter2);
508
    return ret;
509
}
510

    
511
#if ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT)
512
static int initMMX2HScaler(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits)
513
{
514
    uint8_t *fragmentA;
515
    x86_reg imm8OfPShufW1A;
516
    x86_reg imm8OfPShufW2A;
517
    x86_reg fragmentLengthA;
518
    uint8_t *fragmentB;
519
    x86_reg imm8OfPShufW1B;
520
    x86_reg imm8OfPShufW2B;
521
    x86_reg fragmentLengthB;
522
    int fragmentPos;
523

    
524
    int xpos, i;
525

    
526
    // create an optimized horizontal scaling routine
527
    /* This scaler is made of runtime-generated MMX2 code using specially
528
     * tuned pshufw instructions. For every four output pixels, if four
529
     * input pixels are enough for the fast bilinear scaling, then a chunk
530
     * of fragmentB is used. If five input pixels are needed, then a chunk
531
     * of fragmentA is used.
532
     */
533

    
534
    //code fragment
535

    
536
    __asm__ volatile(
537
        "jmp                         9f                 \n\t"
538
    // Begin
539
        "0:                                             \n\t"
540
        "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"
541
        "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"
542
        "movd   1(%%"REG_c", %%"REG_S"), %%mm1          \n\t"
543
        "punpcklbw                %%mm7, %%mm1          \n\t"
544
        "punpcklbw                %%mm7, %%mm0          \n\t"
545
        "pshufw                   $0xFF, %%mm1, %%mm1   \n\t"
546
        "1:                                             \n\t"
547
        "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"
548
        "2:                                             \n\t"
549
        "psubw                    %%mm1, %%mm0          \n\t"
550
        "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"
551
        "pmullw                   %%mm3, %%mm0          \n\t"
552
        "psllw                       $7, %%mm1          \n\t"
553
        "paddw                    %%mm1, %%mm0          \n\t"
554

    
555
        "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"
556

    
557
        "add                         $8, %%"REG_a"      \n\t"
558
    // End
559
        "9:                                             \n\t"
560
//        "int $3                                         \n\t"
561
        "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"
562
        "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"
563
        "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"
564
        "dec                         %1                 \n\t"
565
        "dec                         %2                 \n\t"
566
        "sub                         %0, %1             \n\t"
567
        "sub                         %0, %2             \n\t"
568
        "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"
569
        "sub                         %0, %3             \n\t"
570

    
571

    
572
        :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),
573
        "=r" (fragmentLengthA)
574
    );
575

    
576
    __asm__ volatile(
577
        "jmp                         9f                 \n\t"
578
    // Begin
579
        "0:                                             \n\t"
580
        "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"
581
        "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"
582
        "punpcklbw                %%mm7, %%mm0          \n\t"
583
        "pshufw                   $0xFF, %%mm0, %%mm1   \n\t"
584
        "1:                                             \n\t"
585
        "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"
586
        "2:                                             \n\t"
587
        "psubw                    %%mm1, %%mm0          \n\t"
588
        "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"
589
        "pmullw                   %%mm3, %%mm0          \n\t"
590
        "psllw                       $7, %%mm1          \n\t"
591
        "paddw                    %%mm1, %%mm0          \n\t"
592

    
593
        "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"
594

    
595
        "add                         $8, %%"REG_a"      \n\t"
596
    // End
597
        "9:                                             \n\t"
598
//        "int                       $3                   \n\t"
599
        "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"
600
        "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"
601
        "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"
602
        "dec                         %1                 \n\t"
603
        "dec                         %2                 \n\t"
604
        "sub                         %0, %1             \n\t"
605
        "sub                         %0, %2             \n\t"
606
        "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"
607
        "sub                         %0, %3             \n\t"
608

    
609

    
610
        :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),
611
        "=r" (fragmentLengthB)
612
    );
613

    
614
    xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers
615
    fragmentPos=0;
616

    
617
    for (i=0; i<dstW/numSplits; i++) {
618
        int xx=xpos>>16;
619

    
620
        if ((i&3) == 0) {
621
            int a=0;
622
            int b=((xpos+xInc)>>16) - xx;
623
            int c=((xpos+xInc*2)>>16) - xx;
624
            int d=((xpos+xInc*3)>>16) - xx;
625
            int inc                = (d+1<4);
626
            uint8_t *fragment      = (d+1<4) ? fragmentB       : fragmentA;
627
            x86_reg imm8OfPShufW1  = (d+1<4) ? imm8OfPShufW1B  : imm8OfPShufW1A;
628
            x86_reg imm8OfPShufW2  = (d+1<4) ? imm8OfPShufW2B  : imm8OfPShufW2A;
629
            x86_reg fragmentLength = (d+1<4) ? fragmentLengthB : fragmentLengthA;
630
            int maxShift= 3-(d+inc);
631
            int shift=0;
632

    
633
            if (filterCode) {
634
                filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;
635
                filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;
636
                filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;
637
                filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;
638
                filterPos[i/2]= xx;
639

    
640
                memcpy(filterCode + fragmentPos, fragment, fragmentLength);
641

    
642
                filterCode[fragmentPos + imm8OfPShufW1]=
643
                    (a+inc) | ((b+inc)<<2) | ((c+inc)<<4) | ((d+inc)<<6);
644
                filterCode[fragmentPos + imm8OfPShufW2]=
645
                    a | (b<<2) | (c<<4) | (d<<6);
646

    
647
                if (i+4-inc>=dstW) shift=maxShift; //avoid overread
648
                else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align
649

    
650
                if (shift && i>=shift) {
651
                    filterCode[fragmentPos + imm8OfPShufW1]+= 0x55*shift;
652
                    filterCode[fragmentPos + imm8OfPShufW2]+= 0x55*shift;
653
                    filterPos[i/2]-=shift;
654
                }
655
            }
656

    
657
            fragmentPos+= fragmentLength;
658

    
659
            if (filterCode)
660
                filterCode[fragmentPos]= RET;
661
        }
662
        xpos+=xInc;
663
    }
664
    if (filterCode)
665
        filterPos[((i/2)+1)&(~1)]= xpos>>16; // needed to jump to the next part
666

    
667
    return fragmentPos + 1;
668
}
669
#endif /* ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) */
670

    
671
static void getSubSampleFactors(int *h, int *v, enum PixelFormat format)
672
{
673
    *h = av_pix_fmt_descriptors[format].log2_chroma_w;
674
    *v = av_pix_fmt_descriptors[format].log2_chroma_h;
675
}
676

    
677
static int update_flags_cpu(int flags);
678

    
679
int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation)
680
{
681
    memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);
682
    memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);
683

    
684
    c->brightness= brightness;
685
    c->contrast  = contrast;
686
    c->saturation= saturation;
687
    c->srcRange  = srcRange;
688
    c->dstRange  = dstRange;
689
    if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
690

    
691
    c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[c->dstFormat]);
692
    c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[c->srcFormat]);
693
    c->flags = update_flags_cpu(c->flags);
694

    
695
    ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);
696
    //FIXME factorize
697

    
698
#if HAVE_ALTIVEC
699
    if (c->flags & SWS_CPU_CAPS_ALTIVEC)
700
        ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness, contrast, saturation);
701
#endif
702
    return 0;
703
}
704

    
705
int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)
706
{
707
    if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
708

    
709
    *inv_table = c->srcColorspaceTable;
710
    *table     = c->dstColorspaceTable;
711
    *srcRange  = c->srcRange;
712
    *dstRange  = c->dstRange;
713
    *brightness= c->brightness;
714
    *contrast  = c->contrast;
715
    *saturation= c->saturation;
716

    
717
    return 0;
718
}
719

    
720
static int handle_jpeg(enum PixelFormat *format)
721
{
722
    switch (*format) {
723
    case PIX_FMT_YUVJ420P: *format = PIX_FMT_YUV420P; return 1;
724
    case PIX_FMT_YUVJ422P: *format = PIX_FMT_YUV422P; return 1;
725
    case PIX_FMT_YUVJ444P: *format = PIX_FMT_YUV444P; return 1;
726
    case PIX_FMT_YUVJ440P: *format = PIX_FMT_YUV440P; return 1;
727
    default:                                          return 0;
728
    }
729
}
730

    
731
static int update_flags_cpu(int flags)
732
{
733
#if !CONFIG_RUNTIME_CPUDETECT //ensure that the flags match the compiled variant if cpudetect is off
734
    flags &= ~( SWS_CPU_CAPS_MMX
735
               |SWS_CPU_CAPS_MMX2
736
               |SWS_CPU_CAPS_3DNOW
737
               |SWS_CPU_CAPS_SSE2
738
               |SWS_CPU_CAPS_ALTIVEC
739
               |SWS_CPU_CAPS_BFIN);
740
    flags |= ff_hardcodedcpuflags();
741
#endif /* CONFIG_RUNTIME_CPUDETECT */
742
    return flags;
743
}
744

    
745
SwsContext *sws_alloc_context(void)
746
{
747
    SwsContext *c= av_mallocz(sizeof(SwsContext));
748

    
749
    c->av_class = &sws_context_class;
750
    av_opt_set_defaults(c);
751

    
752
    return c;
753
}
754

    
755
int sws_init_context(SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter)
756
{
757
    int i;
758
    int usesVFilter, usesHFilter;
759
    int unscaled;
760
    SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};
761
    int srcW= c->srcW;
762
    int srcH= c->srcH;
763
    int dstW= c->dstW;
764
    int dstH= c->dstH;
765
    int flags;
766
    enum PixelFormat srcFormat= c->srcFormat;
767
    enum PixelFormat dstFormat= c->dstFormat;
768

    
769
    flags= c->flags = update_flags_cpu(c->flags);
770
#if ARCH_X86
771
    if (flags & SWS_CPU_CAPS_MMX)
772
        __asm__ volatile("emms\n\t"::: "memory");
773
#endif
774
    if (!rgb15to16) sws_rgb2rgb_init(flags);
775

    
776
    unscaled = (srcW == dstW && srcH == dstH);
777

    
778
    if (!isSupportedIn(srcFormat)) {
779
        av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", sws_format_name(srcFormat));
780
        return AVERROR(EINVAL);
781
    }
782
    if (!isSupportedOut(dstFormat)) {
783
        av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output pixel format\n", sws_format_name(dstFormat));
784
        return AVERROR(EINVAL);
785
    }
786

    
787
    i= flags & ( SWS_POINT
788
                |SWS_AREA
789
                |SWS_BILINEAR
790
                |SWS_FAST_BILINEAR
791
                |SWS_BICUBIC
792
                |SWS_X
793
                |SWS_GAUSS
794
                |SWS_LANCZOS
795
                |SWS_SINC
796
                |SWS_SPLINE
797
                |SWS_BICUBLIN);
798
    if(!i || (i & (i-1))) {
799
        av_log(NULL, AV_LOG_ERROR, "swScaler: Exactly one scaler algorithm must be chosen\n");
800
        return AVERROR(EINVAL);
801
    }
802
    /* sanity check */
803
    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
804
        av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",
805
               srcW, srcH, dstW, dstH);
806
        return AVERROR(EINVAL);
807
    }
808
    if(srcW > VOFW || dstW > VOFW) {
809
        av_log(NULL, AV_LOG_ERROR, "swScaler: Compile-time maximum width is "AV_STRINGIFY(VOFW)" change VOF/VOFW and recompile\n");
810
        return AVERROR(EINVAL);
811
    }
812

    
813
    if (!dstFilter) dstFilter= &dummyFilter;
814
    if (!srcFilter) srcFilter= &dummyFilter;
815

    
816
    c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;
817
    c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;
818
    c->dstFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[dstFormat]);
819
    c->srcFormatBpp = av_get_bits_per_pixel(&av_pix_fmt_descriptors[srcFormat]);
820
    c->vRounder= 4* 0x0001000100010001ULL;
821

    
822
    usesVFilter = (srcFilter->lumV && srcFilter->lumV->length>1) ||
823
                  (srcFilter->chrV && srcFilter->chrV->length>1) ||
824
                  (dstFilter->lumV && dstFilter->lumV->length>1) ||
825
                  (dstFilter->chrV && dstFilter->chrV->length>1);
826
    usesHFilter = (srcFilter->lumH && srcFilter->lumH->length>1) ||
827
                  (srcFilter->chrH && srcFilter->chrH->length>1) ||
828
                  (dstFilter->lumH && dstFilter->lumH->length>1) ||
829
                  (dstFilter->chrH && dstFilter->chrH->length>1);
830

    
831
    getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);
832
    getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);
833

    
834
    // reuse chroma for 2 pixels RGB/BGR unless user wants full chroma interpolation
835
    if (isAnyRGB(dstFormat) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;
836

    
837
    // drop some chroma lines if the user wants it
838
    c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;
839
    c->chrSrcVSubSample+= c->vChrDrop;
840

    
841
    // drop every other pixel for chroma calculation unless user wants full chroma
842
    if (isAnyRGB(srcFormat) && !(flags&SWS_FULL_CHR_H_INP)
843
      && srcFormat!=PIX_FMT_RGB8      && srcFormat!=PIX_FMT_BGR8
844
      && srcFormat!=PIX_FMT_RGB4      && srcFormat!=PIX_FMT_BGR4
845
      && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE
846
      && ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&SWS_FAST_BILINEAR)))
847
        c->chrSrcHSubSample=1;
848

    
849
    // Note the -((-x)>>y) is so that we always round toward +inf.
850
    c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);
851
    c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);
852
    c->chrDstW= -((-dstW) >> c->chrDstHSubSample);
853
    c->chrDstH= -((-dstH) >> c->chrDstVSubSample);
854

    
855
    /* unscaled special cases */
856
    if (unscaled && !usesHFilter && !usesVFilter && (c->srcRange == c->dstRange || isAnyRGB(dstFormat))) {
857
        ff_get_unscaled_swscale(c);
858

    
859
        if (c->swScale) {
860
            if (flags&SWS_PRINT_INFO)
861
                av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",
862
                       sws_format_name(srcFormat), sws_format_name(dstFormat));
863
            return 0;
864
        }
865
    }
866

    
867
    if (flags & SWS_CPU_CAPS_MMX2) {
868
        c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;
869
        if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR)) {
870
            if (flags&SWS_PRINT_INFO)
871
                av_log(c, AV_LOG_INFO, "output width is not a multiple of 32 -> no MMX2 scaler\n");
872
        }
873
        if (usesHFilter) c->canMMX2BeUsed=0;
874
    }
875
    else
876
        c->canMMX2BeUsed=0;
877

    
878
    c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;
879
    c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;
880

    
881
    // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst
882
    // but only for the FAST_BILINEAR mode otherwise do correct scaling
883
    // n-2 is the last chrominance sample available
884
    // this is not perfect, but no one should notice the difference, the more correct variant
885
    // would be like the vertical one, but that would require some special code for the
886
    // first and last pixel
887
    if (flags&SWS_FAST_BILINEAR) {
888
        if (c->canMMX2BeUsed) {
889
            c->lumXInc+= 20;
890
            c->chrXInc+= 20;
891
        }
892
        //we don't use the x86 asm scaler if MMX is available
893
        else if (flags & SWS_CPU_CAPS_MMX) {
894
            c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;
895
            c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;
896
        }
897
    }
898

    
899
    /* precalculate horizontal scaler filter coefficients */
900
    {
901
#if ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT)
902
// can't downscale !!!
903
        if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR)) {
904
            c->lumMmx2FilterCodeSize = initMMX2HScaler(      dstW, c->lumXInc, NULL, NULL, NULL, 8);
905
            c->chrMmx2FilterCodeSize = initMMX2HScaler(c->chrDstW, c->chrXInc, NULL, NULL, NULL, 4);
906

    
907
#ifdef MAP_ANONYMOUS
908
            c->lumMmx2FilterCode = mmap(NULL, c->lumMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
909
            c->chrMmx2FilterCode = mmap(NULL, c->chrMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
910
#elif HAVE_VIRTUALALLOC
911
            c->lumMmx2FilterCode = VirtualAlloc(NULL, c->lumMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
912
            c->chrMmx2FilterCode = VirtualAlloc(NULL, c->chrMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
913
#else
914
            c->lumMmx2FilterCode = av_malloc(c->lumMmx2FilterCodeSize);
915
            c->chrMmx2FilterCode = av_malloc(c->chrMmx2FilterCodeSize);
916
#endif
917

    
918
            if (!c->lumMmx2FilterCode || !c->chrMmx2FilterCode)
919
                return AVERROR(ENOMEM);
920
            FF_ALLOCZ_OR_GOTO(c, c->hLumFilter   , (dstW        /8+8)*sizeof(int16_t), fail);
921
            FF_ALLOCZ_OR_GOTO(c, c->hChrFilter   , (c->chrDstW  /4+8)*sizeof(int16_t), fail);
922
            FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW      /2/8+8)*sizeof(int32_t), fail);
923
            FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW/2/4+8)*sizeof(int32_t), fail);
924

    
925
            initMMX2HScaler(      dstW, c->lumXInc, c->lumMmx2FilterCode, c->hLumFilter, c->hLumFilterPos, 8);
926
            initMMX2HScaler(c->chrDstW, c->chrXInc, c->chrMmx2FilterCode, c->hChrFilter, c->hChrFilterPos, 4);
927

    
928
#ifdef MAP_ANONYMOUS
929
            mprotect(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize, PROT_EXEC | PROT_READ);
930
            mprotect(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize, PROT_EXEC | PROT_READ);
931
#endif
932
        } else
933
#endif /* ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) */
934
        {
935
            const int filterAlign=
936
                (flags & SWS_CPU_CAPS_MMX) ? 4 :
937
                (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :
938
                1;
939

    
940
            if (initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,
941
                           srcW      ,       dstW, filterAlign, 1<<14,
942
                           (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,
943
                           srcFilter->lumH, dstFilter->lumH, c->param) < 0)
944
                goto fail;
945
            if (initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,
946
                           c->chrSrcW, c->chrDstW, filterAlign, 1<<14,
947
                           (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,
948
                           srcFilter->chrH, dstFilter->chrH, c->param) < 0)
949
                goto fail;
950
        }
951
    } // initialize horizontal stuff
952

    
953
    /* precalculate vertical scaler filter coefficients */
954
    {
955
        const int filterAlign=
956
            (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :
957
            (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :
958
            1;
959

    
960
        if (initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,
961
                       srcH      ,        dstH, filterAlign, (1<<12),
962
                       (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,
963
                       srcFilter->lumV, dstFilter->lumV, c->param) < 0)
964
            goto fail;
965
        if (initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,
966
                       c->chrSrcH, c->chrDstH, filterAlign, (1<<12),
967
                       (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,
968
                       srcFilter->chrV, dstFilter->chrV, c->param) < 0)
969
            goto fail;
970

    
971
#if HAVE_ALTIVEC
972
        FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof (vector signed short)*c->vLumFilterSize*c->dstH, fail);
973
        FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH, fail);
974

    
975
        for (i=0;i<c->vLumFilterSize*c->dstH;i++) {
976
            int j;
977
            short *p = (short *)&c->vYCoeffsBank[i];
978
            for (j=0;j<8;j++)
979
                p[j] = c->vLumFilter[i];
980
        }
981

    
982
        for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {
983
            int j;
984
            short *p = (short *)&c->vCCoeffsBank[i];
985
            for (j=0;j<8;j++)
986
                p[j] = c->vChrFilter[i];
987
        }
988
#endif
989
    }
990

    
991
    // calculate buffer sizes so that they won't run out while handling these damn slices
992
    c->vLumBufSize= c->vLumFilterSize;
993
    c->vChrBufSize= c->vChrFilterSize;
994
    for (i=0; i<dstH; i++) {
995
        int chrI= i*c->chrDstH / dstH;
996
        int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,
997
                           ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));
998

    
999
        nextSlice>>= c->chrSrcVSubSample;
1000
        nextSlice<<= c->chrSrcVSubSample;
1001
        if (c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)
1002
            c->vLumBufSize= nextSlice - c->vLumFilterPos[i];
1003
        if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))
1004
            c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];
1005
    }
1006

    
1007
    // allocate pixbufs (we use dynamic allocation because otherwise we would need to
1008
    // allocate several megabytes to handle all possible cases)
1009
    FF_ALLOC_OR_GOTO(c, c->lumPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);
1010
    FF_ALLOC_OR_GOTO(c, c->chrPixBuf, c->vChrBufSize*2*sizeof(int16_t*), fail);
1011
    if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat))
1012
        FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);
1013
    //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)
1014
    /* align at 16 bytes for AltiVec */
1015
    for (i=0; i<c->vLumBufSize; i++) {
1016
        FF_ALLOCZ_OR_GOTO(c, c->lumPixBuf[i+c->vLumBufSize], VOF+1, fail);
1017
        c->lumPixBuf[i] = c->lumPixBuf[i+c->vLumBufSize];
1018
    }
1019
    for (i=0; i<c->vChrBufSize; i++) {
1020
        FF_ALLOC_OR_GOTO(c, c->chrPixBuf[i+c->vChrBufSize], (VOF+1)*2, fail);
1021
        c->chrPixBuf[i] = c->chrPixBuf[i+c->vChrBufSize];
1022
    }
1023
    if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf)
1024
        for (i=0; i<c->vLumBufSize; i++) {
1025
            FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf[i+c->vLumBufSize], VOF+1, fail);
1026
            c->alpPixBuf[i] = c->alpPixBuf[i+c->vLumBufSize];
1027
        }
1028

    
1029
    //try to avoid drawing green stuff between the right end and the stride end
1030
    for (i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, (VOF+1)*2);
1031

    
1032
    assert(2*VOFW == VOF);
1033

    
1034
    assert(c->chrDstH <= dstH);
1035

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

    
1050
        av_log(c, AV_LOG_INFO, "from %s to %s%s ",
1051
               sws_format_name(srcFormat),
1052
#ifdef DITHER1XBPP
1053
               dstFormat == PIX_FMT_BGR555 || dstFormat == PIX_FMT_BGR565 ||
1054
               dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE ||
1055
               dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE ? "dithered " : "",
1056
#else
1057
               "",
1058
#endif
1059
               sws_format_name(dstFormat));
1060

    
1061
        if      (flags & SWS_CPU_CAPS_MMX2)    av_log(c, AV_LOG_INFO, "using MMX2\n");
1062
        else if (flags & SWS_CPU_CAPS_3DNOW)   av_log(c, AV_LOG_INFO, "using 3DNOW\n");
1063
        else if (flags & SWS_CPU_CAPS_MMX)     av_log(c, AV_LOG_INFO, "using MMX\n");
1064
        else if (flags & SWS_CPU_CAPS_ALTIVEC) av_log(c, AV_LOG_INFO, "using AltiVec\n");
1065
        else                                   av_log(c, AV_LOG_INFO, "using C\n");
1066

    
1067
        if (flags & SWS_CPU_CAPS_MMX) {
1068
            if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))
1069
                av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");
1070
            else {
1071
                if (c->hLumFilterSize==4)
1072
                    av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n");
1073
                else if (c->hLumFilterSize==8)
1074
                    av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n");
1075
                else
1076
                    av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n");
1077

    
1078
                if (c->hChrFilterSize==4)
1079
                    av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n");
1080
                else if (c->hChrFilterSize==8)
1081
                    av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n");
1082
                else
1083
                    av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n");
1084
            }
1085
        } else {
1086
#if ARCH_X86
1087
            av_log(c, AV_LOG_VERBOSE, "using x86 asm scaler for horizontal scaling\n");
1088
#else
1089
            if (flags & SWS_FAST_BILINEAR)
1090
                av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n");
1091
            else
1092
                av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n");
1093
#endif
1094
        }
1095
        if (isPlanarYUV(dstFormat)) {
1096
            if (c->vLumFilterSize==1)
1097
                av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1098
            else
1099
                av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1100
        } else {
1101
            if (c->vLumFilterSize==1 && c->vChrFilterSize==2)
1102
                av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"
1103
                       "      2-tap scaler for vertical chrominance scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1104
            else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)
1105
                av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1106
            else
1107
                av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1108
        }
1109

    
1110
        if (dstFormat==PIX_FMT_BGR24)
1111
            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 converter\n",
1112
                   (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));
1113
        else if (dstFormat==PIX_FMT_RGB32)
1114
            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1115
        else if (dstFormat==PIX_FMT_BGR565)
1116
            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1117
        else if (dstFormat==PIX_FMT_BGR555)
1118
            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1119
        else if (dstFormat == PIX_FMT_RGB444BE || dstFormat == PIX_FMT_RGB444LE ||
1120
                 dstFormat == PIX_FMT_BGR444BE || dstFormat == PIX_FMT_BGR444LE)
1121
            av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR12 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
1122

    
1123
        av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
1124
        av_log(c, AV_LOG_DEBUG, "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1125
               c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
1126
        av_log(c, AV_LOG_DEBUG, "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1127
               c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);
1128
    }
1129

    
1130
    c->swScale= ff_getSwsFunc(c);
1131
    return 0;
1132
fail: //FIXME replace things by appropriate error codes
1133
    return -1;
1134
}
1135

    
1136
#if FF_API_SWS_GETCONTEXT
1137
SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
1138
                           int dstW, int dstH, enum PixelFormat dstFormat, int flags,
1139
                           SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
1140
{
1141
    SwsContext *c;
1142

    
1143
    if(!(c=sws_alloc_context()))
1144
        return NULL;
1145

    
1146
    c->flags= flags;
1147
    c->srcW= srcW;
1148
    c->srcH= srcH;
1149
    c->dstW= dstW;
1150
    c->dstH= dstH;
1151
    c->srcRange = handle_jpeg(&srcFormat);
1152
    c->dstRange = handle_jpeg(&dstFormat);
1153
    c->srcFormat= srcFormat;
1154
    c->dstFormat= dstFormat;
1155

    
1156
    if (param) {
1157
        c->param[0] = param[0];
1158
        c->param[1] = param[1];
1159
    }
1160
    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);
1161

    
1162
    if(sws_init_context(c, srcFilter, dstFilter) < 0){
1163
        sws_freeContext(c);
1164
        return NULL;
1165
    }
1166

    
1167
    return c;
1168
}
1169
#endif
1170

    
1171
SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
1172
                                float lumaSharpen, float chromaSharpen,
1173
                                float chromaHShift, float chromaVShift,
1174
                                int verbose)
1175
{
1176
    SwsFilter *filter= av_malloc(sizeof(SwsFilter));
1177
    if (!filter)
1178
        return NULL;
1179

    
1180
    if (lumaGBlur!=0.0) {
1181
        filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);
1182
        filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);
1183
    } else {
1184
        filter->lumH= sws_getIdentityVec();
1185
        filter->lumV= sws_getIdentityVec();
1186
    }
1187

    
1188
    if (chromaGBlur!=0.0) {
1189
        filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);
1190
        filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);
1191
    } else {
1192
        filter->chrH= sws_getIdentityVec();
1193
        filter->chrV= sws_getIdentityVec();
1194
    }
1195

    
1196
    if (chromaSharpen!=0.0) {
1197
        SwsVector *id= sws_getIdentityVec();
1198
        sws_scaleVec(filter->chrH, -chromaSharpen);
1199
        sws_scaleVec(filter->chrV, -chromaSharpen);
1200
        sws_addVec(filter->chrH, id);
1201
        sws_addVec(filter->chrV, id);
1202
        sws_freeVec(id);
1203
    }
1204

    
1205
    if (lumaSharpen!=0.0) {
1206
        SwsVector *id= sws_getIdentityVec();
1207
        sws_scaleVec(filter->lumH, -lumaSharpen);
1208
        sws_scaleVec(filter->lumV, -lumaSharpen);
1209
        sws_addVec(filter->lumH, id);
1210
        sws_addVec(filter->lumV, id);
1211
        sws_freeVec(id);
1212
    }
1213

    
1214
    if (chromaHShift != 0.0)
1215
        sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));
1216

    
1217
    if (chromaVShift != 0.0)
1218
        sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));
1219

    
1220
    sws_normalizeVec(filter->chrH, 1.0);
1221
    sws_normalizeVec(filter->chrV, 1.0);
1222
    sws_normalizeVec(filter->lumH, 1.0);
1223
    sws_normalizeVec(filter->lumV, 1.0);
1224

    
1225
    if (verbose) sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);
1226
    if (verbose) sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);
1227

    
1228
    return filter;
1229
}
1230

    
1231
SwsVector *sws_allocVec(int length)
1232
{
1233
    SwsVector *vec = av_malloc(sizeof(SwsVector));
1234
    if (!vec)
1235
        return NULL;
1236
    vec->length = length;
1237
    vec->coeff  = av_malloc(sizeof(double) * length);
1238
    if (!vec->coeff)
1239
        av_freep(&vec);
1240
    return vec;
1241
}
1242

    
1243
SwsVector *sws_getGaussianVec(double variance, double quality)
1244
{
1245
    const int length= (int)(variance*quality + 0.5) | 1;
1246
    int i;
1247
    double middle= (length-1)*0.5;
1248
    SwsVector *vec= sws_allocVec(length);
1249

    
1250
    if (!vec)
1251
        return NULL;
1252

    
1253
    for (i=0; i<length; i++) {
1254
        double dist= i-middle;
1255
        vec->coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*M_PI);
1256
    }
1257

    
1258
    sws_normalizeVec(vec, 1.0);
1259

    
1260
    return vec;
1261
}
1262

    
1263
SwsVector *sws_getConstVec(double c, int length)
1264
{
1265
    int i;
1266
    SwsVector *vec= sws_allocVec(length);
1267

    
1268
    if (!vec)
1269
        return NULL;
1270

    
1271
    for (i=0; i<length; i++)
1272
        vec->coeff[i]= c;
1273

    
1274
    return vec;
1275
}
1276

    
1277
SwsVector *sws_getIdentityVec(void)
1278
{
1279
    return sws_getConstVec(1.0, 1);
1280
}
1281

    
1282
static double sws_dcVec(SwsVector *a)
1283
{
1284
    int i;
1285
    double sum=0;
1286

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

    
1290
    return sum;
1291
}
1292

    
1293
void sws_scaleVec(SwsVector *a, double scalar)
1294
{
1295
    int i;
1296

    
1297
    for (i=0; i<a->length; i++)
1298
        a->coeff[i]*= scalar;
1299
}
1300

    
1301
void sws_normalizeVec(SwsVector *a, double height)
1302
{
1303
    sws_scaleVec(a, height/sws_dcVec(a));
1304
}
1305

    
1306
static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b)
1307
{
1308
    int length= a->length + b->length - 1;
1309
    int i, j;
1310
    SwsVector *vec= sws_getConstVec(0.0, length);
1311

    
1312
    if (!vec)
1313
        return NULL;
1314

    
1315
    for (i=0; i<a->length; i++) {
1316
        for (j=0; j<b->length; j++) {
1317
            vec->coeff[i+j]+= a->coeff[i]*b->coeff[j];
1318
        }
1319
    }
1320

    
1321
    return vec;
1322
}
1323

    
1324
static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b)
1325
{
1326
    int length= FFMAX(a->length, b->length);
1327
    int i;
1328
    SwsVector *vec= sws_getConstVec(0.0, length);
1329

    
1330
    if (!vec)
1331
        return NULL;
1332

    
1333
    for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
1334
    for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];
1335

    
1336
    return vec;
1337
}
1338

    
1339
static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b)
1340
{
1341
    int length= FFMAX(a->length, b->length);
1342
    int i;
1343
    SwsVector *vec= sws_getConstVec(0.0, length);
1344

    
1345
    if (!vec)
1346
        return NULL;
1347

    
1348
    for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
1349
    for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];
1350

    
1351
    return vec;
1352
}
1353

    
1354
/* shift left / or right if "shift" is negative */
1355
static SwsVector *sws_getShiftedVec(SwsVector *a, int shift)
1356
{
1357
    int length= a->length + FFABS(shift)*2;
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++) {
1365
        vec->coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];
1366
    }
1367

    
1368
    return vec;
1369
}
1370

    
1371
void sws_shiftVec(SwsVector *a, int shift)
1372
{
1373
    SwsVector *shifted= sws_getShiftedVec(a, shift);
1374
    av_free(a->coeff);
1375
    a->coeff= shifted->coeff;
1376
    a->length= shifted->length;
1377
    av_free(shifted);
1378
}
1379

    
1380
void sws_addVec(SwsVector *a, SwsVector *b)
1381
{
1382
    SwsVector *sum= sws_sumVec(a, b);
1383
    av_free(a->coeff);
1384
    a->coeff= sum->coeff;
1385
    a->length= sum->length;
1386
    av_free(sum);
1387
}
1388

    
1389
void sws_subVec(SwsVector *a, SwsVector *b)
1390
{
1391
    SwsVector *diff= sws_diffVec(a, b);
1392
    av_free(a->coeff);
1393
    a->coeff= diff->coeff;
1394
    a->length= diff->length;
1395
    av_free(diff);
1396
}
1397

    
1398
void sws_convVec(SwsVector *a, SwsVector *b)
1399
{
1400
    SwsVector *conv= sws_getConvVec(a, b);
1401
    av_free(a->coeff);
1402
    a->coeff= conv->coeff;
1403
    a->length= conv->length;
1404
    av_free(conv);
1405
}
1406

    
1407
SwsVector *sws_cloneVec(SwsVector *a)
1408
{
1409
    int i;
1410
    SwsVector *vec= sws_allocVec(a->length);
1411

    
1412
    if (!vec)
1413
        return NULL;
1414

    
1415
    for (i=0; i<a->length; i++) vec->coeff[i]= a->coeff[i];
1416

    
1417
    return vec;
1418
}
1419

    
1420
void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)
1421
{
1422
    int i;
1423
    double max=0;
1424
    double min=0;
1425
    double range;
1426

    
1427
    for (i=0; i<a->length; i++)
1428
        if (a->coeff[i]>max) max= a->coeff[i];
1429

    
1430
    for (i=0; i<a->length; i++)
1431
        if (a->coeff[i]<min) min= a->coeff[i];
1432

    
1433
    range= max - min;
1434

    
1435
    for (i=0; i<a->length; i++) {
1436
        int x= (int)((a->coeff[i]-min)*60.0/range +0.5);
1437
        av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);
1438
        for (;x>0; x--) av_log(log_ctx, log_level, " ");
1439
        av_log(log_ctx, log_level, "|\n");
1440
    }
1441
}
1442

    
1443
#if LIBSWSCALE_VERSION_MAJOR < 1
1444
void sws_printVec(SwsVector *a)
1445
{
1446
    sws_printVec2(a, NULL, AV_LOG_DEBUG);
1447
}
1448
#endif
1449

    
1450
void sws_freeVec(SwsVector *a)
1451
{
1452
    if (!a) return;
1453
    av_freep(&a->coeff);
1454
    a->length=0;
1455
    av_free(a);
1456
}
1457

    
1458
void sws_freeFilter(SwsFilter *filter)
1459
{
1460
    if (!filter) return;
1461

    
1462
    if (filter->lumH) sws_freeVec(filter->lumH);
1463
    if (filter->lumV) sws_freeVec(filter->lumV);
1464
    if (filter->chrH) sws_freeVec(filter->chrH);
1465
    if (filter->chrV) sws_freeVec(filter->chrV);
1466
    av_free(filter);
1467
}
1468

    
1469
void sws_freeContext(SwsContext *c)
1470
{
1471
    int i;
1472
    if (!c) return;
1473

    
1474
    if (c->lumPixBuf) {
1475
        for (i=0; i<c->vLumBufSize; i++)
1476
            av_freep(&c->lumPixBuf[i]);
1477
        av_freep(&c->lumPixBuf);
1478
    }
1479

    
1480
    if (c->chrPixBuf) {
1481
        for (i=0; i<c->vChrBufSize; i++)
1482
            av_freep(&c->chrPixBuf[i]);
1483
        av_freep(&c->chrPixBuf);
1484
    }
1485

    
1486
    if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {
1487
        for (i=0; i<c->vLumBufSize; i++)
1488
            av_freep(&c->alpPixBuf[i]);
1489
        av_freep(&c->alpPixBuf);
1490
    }
1491

    
1492
    av_freep(&c->vLumFilter);
1493
    av_freep(&c->vChrFilter);
1494
    av_freep(&c->hLumFilter);
1495
    av_freep(&c->hChrFilter);
1496
#if HAVE_ALTIVEC
1497
    av_freep(&c->vYCoeffsBank);
1498
    av_freep(&c->vCCoeffsBank);
1499
#endif
1500

    
1501
    av_freep(&c->vLumFilterPos);
1502
    av_freep(&c->vChrFilterPos);
1503
    av_freep(&c->hLumFilterPos);
1504
    av_freep(&c->hChrFilterPos);
1505

    
1506
#if ARCH_X86
1507
#ifdef MAP_ANONYMOUS
1508
    if (c->lumMmx2FilterCode) munmap(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize);
1509
    if (c->chrMmx2FilterCode) munmap(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize);
1510
#elif HAVE_VIRTUALALLOC
1511
    if (c->lumMmx2FilterCode) VirtualFree(c->lumMmx2FilterCode, 0, MEM_RELEASE);
1512
    if (c->chrMmx2FilterCode) VirtualFree(c->chrMmx2FilterCode, 0, MEM_RELEASE);
1513
#else
1514
    av_free(c->lumMmx2FilterCode);
1515
    av_free(c->chrMmx2FilterCode);
1516
#endif
1517
    c->lumMmx2FilterCode=NULL;
1518
    c->chrMmx2FilterCode=NULL;
1519
#endif /* ARCH_X86 */
1520

    
1521
    av_freep(&c->yuvTable);
1522

    
1523
    av_free(c);
1524
}
1525

    
1526
struct SwsContext *sws_getCachedContext(struct SwsContext *context,
1527
                                        int srcW, int srcH, enum PixelFormat srcFormat,
1528
                                        int dstW, int dstH, enum PixelFormat dstFormat, int flags,
1529
                                        SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
1530
{
1531
    static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};
1532

    
1533
    if (!param)
1534
        param = default_param;
1535

    
1536
    flags = update_flags_cpu(flags);
1537

    
1538
    if (context &&
1539
        (context->srcW      != srcW      ||
1540
         context->srcH      != srcH      ||
1541
         context->srcFormat != srcFormat ||
1542
         context->dstW      != dstW      ||
1543
         context->dstH      != dstH      ||
1544
         context->dstFormat != dstFormat ||
1545
         context->flags     != flags     ||
1546
         context->param[0]  != param[0]  ||
1547
         context->param[1]  != param[1])) {
1548
        sws_freeContext(context);
1549
        context = NULL;
1550
    }
1551

    
1552
    if (!context) {
1553
        if (!(context = sws_alloc_context()))
1554
            return NULL;
1555
        context->srcW      = srcW;
1556
        context->srcH      = srcH;
1557
        context->srcRange  = handle_jpeg(&srcFormat);
1558
        context->srcFormat = srcFormat;
1559
        context->dstW      = dstW;
1560
        context->dstH      = dstH;
1561
        context->dstRange  = handle_jpeg(&dstFormat);
1562
        context->dstFormat = dstFormat;
1563
        context->flags     = flags;
1564
        context->param[0]  = param[0];
1565
        context->param[1]  = param[1];
1566
        sws_setColorspaceDetails(context, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], context->srcRange, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT] /* FIXME*/, context->dstRange, 0, 1<<16, 1<<16);
1567
        if (sws_init_context(context, srcFilter, dstFilter) < 0) {
1568
            sws_freeContext(context);
1569
            return NULL;
1570
        }
1571
    }
1572
    return context;
1573
}
1574