23 #define _SVID_SOURCE // needed for MAP_ANONYMOUS
24 #define _DARWIN_C_SOURCE // needed for MAP_ANON
31 #if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
32 #define MAP_ANONYMOUS MAP_ANON
36 #define WIN32_LEAN_AND_MEAN
72 #define LICENSE_PREFIX "libswscale license: "
253 return ((d * dist + c) * dist + b) * dist +
a;
256 b + 2.0 * c + 3.0 * d,
258 -b - 3.0 * c - 6.0 * d,
264 if (pos == -1 || pos <= -513) {
265 pos = (128 << chr_subsample) - 128;
268 return pos >> chr_subsample;
285 {
SWS_POINT,
"nearest neighbor / point", -1 },
288 {
SWS_X,
"experimental", 8 },
292 int *outFilterSize,
int xInc,
int srcW,
293 int dstW,
int filterAlign,
int one,
294 int flags,
int cpu_flags,
296 double param[2],
int srcPos,
int dstPos)
303 int64_t *filter2 =
NULL;
304 const int64_t fone = 1LL << (54 -
FFMIN(
av_log2(srcW/dstW), 8));
312 if (
FFABS(xInc - 0x10000) < 10 && srcPos == dstPos) {
316 dstW,
sizeof(*filter) * filterSize,
fail);
318 for (i = 0; i < dstW; i++) {
319 filter[i * filterSize] = fone;
327 dstW,
sizeof(*filter) * filterSize,
fail);
329 xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
330 for (i = 0; i < dstW; i++) {
331 int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
333 (*filterPos)[i] = xx;
337 }
else if ((xInc <= (1 << 16) && (flags &
SWS_AREA)) ||
343 dstW,
sizeof(*filter) * filterSize,
fail);
345 xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
346 for (i = 0; i < dstW; i++) {
347 int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
350 (*filterPos)[i] = xx;
352 for (j = 0; j < filterSize; j++) {
353 int64_t
coeff= fone -
FFABS(((int64_t)xx<<16) - xDstInSrc)*(fone>>16);
356 filter[i * filterSize + j] =
coeff;
366 if (flags & scale_algorithms[i].
flag && scale_algorithms[i].size_factor > 0) {
376 filterSize = 1 + sizeFactor;
378 filterSize = 1 + (sizeFactor * srcW + dstW - 1) / dstW;
380 filterSize =
FFMIN(filterSize, srcW - 2);
381 filterSize =
FFMAX(filterSize, 1);
384 dstW,
sizeof(*filter) * filterSize,
fail);
386 xDstInSrc = ((dstPos*(int64_t)xInc)>>7) - ((srcPos*0x10000LL)>>7);
387 for (i = 0; i < dstW; i++) {
388 int xx = (xDstInSrc - (filterSize - 2) * (1LL<<16)) / (1 << 17);
390 (*filterPos)[i] = xx;
391 for (j = 0; j < filterSize; j++) {
392 int64_t d = (
FFABS(((int64_t)xx * (1 << 17)) - xDstInSrc)) << 13;
398 floatd = d * (1.0 / (1 << 30));
404 if (d >= 1LL << 31) {
407 int64_t dd = (d * d) >> 30;
408 int64_t ddd = (dd * d) >> 30;
411 coeff = (12 * (1 << 24) - 9 * B - 6 * C) * ddd +
412 (-18 * (1 << 24) + 12 * B + 6 * C) * dd +
413 (6 * (1 << 24) - 2 * B) * (1 << 30);
415 coeff = (-B - 6 *
C) * ddd +
416 (6 * B + 30 * C) * dd +
417 (-12 * B - 48 *
C) * d +
418 (8 * B + 24 * C) * (1 << 30);
420 coeff /= (1LL<<54)/fone;
423 else if (flags &
SWS_X) {
424 double p = param ? param * 0.01 : 0.3;
425 coeff = d ? sin(d *
M_PI) / (d *
M_PI) : 1.0;
426 coeff *= pow(2.0, -p * d * d);
429 else if (flags & SWS_X) {
434 c = cos(floatd *
M_PI);
441 coeff = (c * 0.5 + 0.5) * fone;
443 int64_t d2 = d - (1 << 29);
444 if (d2 * xInc < -(1LL << (29 + 16)))
445 coeff = 1.0 * (1LL << (30 + 16));
446 else if (d2 * xInc < (1LL << (29 + 16)))
447 coeff = -d2 * xInc + (1LL << (29 + 16));
450 coeff *= fone >> (30 + 16);
453 coeff = (pow(2.0, -p * floatd * floatd)) * fone;
455 coeff = (d ? sin(floatd *
M_PI) / (floatd *
M_PI) : 1.0) * fone;
456 }
else if (flags & SWS_LANCZOS) {
458 coeff = (d ? sin(floatd *
M_PI) * sin(floatd * M_PI / p) /
459 (floatd * floatd * M_PI * M_PI / p) : 1.0) * fone;
463 coeff = (1 << 30) - d;
468 double p = -2.196152422706632;
474 filter[i * filterSize + j] =
coeff;
477 xDstInSrc += 2 * xInc;
485 filter2Size = filterSize;
487 filter2Size += srcFilter->
length - 1;
489 filter2Size += dstFilter->
length - 1;
493 for (i = 0; i < dstW; i++) {
497 for (k = 0; k < srcFilter->
length; k++) {
498 for (j = 0; j < filterSize; j++)
499 filter2[i * filter2Size + k + j] +=
500 srcFilter->
coeff[k] * filter[i * filterSize + j];
503 for (j = 0; j < filterSize; j++)
504 filter2[i * filter2Size + j] = filter[i * filterSize + j];
508 (*filterPos)[i] += (filterSize - 1) / 2 - (filter2Size - 1) / 2;
515 for (i = dstW - 1; i >= 0; i--) {
516 int min = filter2Size;
518 int64_t cutOff = 0.0;
521 for (j = 0; j < filter2Size; j++) {
523 cutOff +=
FFABS(filter2[i * filter2Size]);
530 if (i < dstW - 1 && (*filterPos)[i] >= (*filterPos)[i + 1])
534 for (k = 1; k < filter2Size; k++)
535 filter2[i * filter2Size + k - 1] = filter2[i * filter2Size + k];
536 filter2[i * filter2Size + k - 1] = 0;
542 for (j = filter2Size - 1; j > 0; j--) {
543 cutOff +=
FFABS(filter2[i * filter2Size + j]);
550 if (min > minFilterSize)
556 if (minFilterSize < 5)
562 if (minFilterSize < 3)
568 if (minFilterSize == 1 && filterAlign == 2)
573 filterSize = (minFilterSize + (filterAlign - 1)) & (~(filterAlign - 1));
583 *outFilterSize = filterSize;
587 "SwScaler: reducing / aligning filtersize %d -> %d\n",
588 filter2Size, filterSize);
590 for (i = 0; i < dstW; i++) {
593 for (j = 0; j < filterSize; j++) {
594 if (j >= filter2Size)
595 filter[i * filterSize + j] = 0;
597 filter[i * filterSize + j] = filter2[i * filter2Size + j];
599 filter[i * filterSize + j] = 0;
606 for (i = 0; i < dstW; i++) {
608 if ((*filterPos)[i] < 0) {
610 for (j = 1; j < filterSize; j++) {
611 int left =
FFMAX(j + (*filterPos)[i], 0);
612 filter[i * filterSize + left] += filter[i * filterSize + j];
613 filter[i * filterSize + j] = 0;
618 if ((*filterPos)[i] + filterSize > srcW) {
619 int shift = (*filterPos)[i] +
FFMIN(filterSize - srcW, 0);
622 for (j = filterSize - 1; j >= 0; j--) {
623 if ((*filterPos)[i] + j >= srcW) {
624 acc += filter[i * filterSize + j];
625 filter[i * filterSize + j] = 0;
628 for (j = filterSize - 1; j >= 0; j--) {
630 filter[i * filterSize + j] = 0;
632 filter[i * filterSize + j] = filter[i * filterSize + j -
shift];
636 (*filterPos)[i]-=
shift;
637 filter[i * filterSize + srcW - 1 - (*filterPos)[i]] +=
acc;
641 if ((*filterPos)[i] + filterSize > srcW) {
642 for (j = 0; j < filterSize; j++) {
643 av_assert0((*filterPos)[i] + j < srcW || !filter[i * filterSize + j]);
651 (dstW + 3), *outFilterSize *
sizeof(int16_t),
fail);
654 for (i = 0; i < dstW; i++) {
659 for (j = 0; j < filterSize; j++) {
660 sum += filter[i * filterSize + j];
662 sum = (sum + one / 2) / one;
667 for (j = 0; j < *outFilterSize; j++) {
668 int64_t
v = filter[i * filterSize + j] + error;
670 (*outFilter)[i * (*outFilterSize) + j] = intV;
671 error = v - intV * sum;
675 (*filterPos)[dstW + 0] =
676 (*filterPos)[dstW + 1] =
677 (*filterPos)[dstW + 2] = (*filterPos)[dstW - 1];
679 for (i = 0; i < *outFilterSize; i++) {
680 int k = (dstW - 1) * (*outFilterSize) + i;
681 (*outFilter)[k + 1 * (*outFilterSize)] =
682 (*outFilter)[k + 2 * (*outFilterSize)] =
683 (*outFilter)[k + 3 * (*outFilterSize)] = (*outFilter)[k];
698 int64_t
W,
V, Z, Cy, Cu, Cv;
699 int64_t vr = table[0];
700 int64_t ub = table[1];
701 int64_t ug = -table[2];
702 int64_t vg = -table[3];
707 static const int8_t map[] = {
732 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 ,
733 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 ,
734 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 ,
735 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 ,
736 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 ,
737 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 ,
738 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 ,
739 -1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 ,
787 AV_WL16(p + 16*4 + 2*i, map[i] >= 0 ?
c->input_rgb2yuv_table[map[i]] : 0);
797 static const int16_t xyz2rgb_matrix[3][4] = {
798 {13270, -6295, -2041},
800 { 228, -835, 4329} };
801 static const int16_t rgb2xyz_matrix[3][4] = {
805 static int16_t xyzgamma_tab[4096], rgbgamma_tab[4096], xyzgammainv_tab[4096], rgbgammainv_tab[4096];
814 if (rgbgamma_tab[4095])
818 for (i = 0; i < 4096; i++) {
819 xyzgamma_tab[i] =
lrint(pow(i / 4095.0, xyzgamma) * 4095.0);
820 rgbgamma_tab[i] =
lrint(pow(i / 4095.0, rgbgamma) * 4095.0);
821 xyzgammainv_tab[i] =
lrint(pow(i / 4095.0, xyzgammainv) * 4095.0);
822 rgbgammainv_tab[i] =
lrint(pow(i / 4095.0, rgbgammainv) * 4095.0);
827 int srcRange,
const int table[4],
int dstRange,
828 int brightness,
int contrast,
int saturation)
883 int tmp_width, tmp_height;
889 av_log(c,
AV_LOG_VERBOSE,
"YUV color matrix differs for YUV->YUV, using intermediate RGB to convert\n");
905 if (srcW*srcH > dstW*dstH) {
914 tmp_width, tmp_height, tmp_format, 64);
919 tmp_width, tmp_height, tmp_format,
930 srcRange, table, dstRange,
931 brightness, contrast, saturation);
939 srcRange, table, dstRange,
940 0, 1 << 16, 1 << 16);
948 contrast, saturation);
953 contrast, saturation);
962 int *srcRange,
int **
table,
int *dstRange,
963 int *brightness,
int *contrast,
int *saturation)
1054 tbl = (uint16_t*)
av_malloc(
sizeof(uint16_t) * 1 << 16);
1058 for (i = 0; i < 65536; ++i) {
1059 tbl[i] = pow(i / 65535.0, e) * 65535.0;
1120 int usesVFilter, usesHFilter;
1127 int dst_stride =
FFALIGN(dstW *
sizeof(int16_t) + 66, 16);
1128 int flags, cpu_flags;
1142 unscaled = (srcW == dstW && srcH == dstH);
1148 av_log(c,
AV_LOG_WARNING,
"deprecated pixel format used, make sure you did set range correctly\n");
1190 if (dstW < srcW && dstH < srcH)
1192 else if (dstW > srcW && dstH > srcH)
1197 }
else if (i & (i - 1)) {
1199 "Exactly one scaler algorithm must be chosen, got %X\n", i);
1203 if (srcW < 1 || srcH < 1 || dstW < 1 || dstH < 1) {
1207 srcW, srcH, dstW, dstH);
1211 if (srcW < 8 || dstW < 8) {
1218 dstFilter = &dummyFilter;
1220 srcFilter = &dummyFilter;
1222 c->
lumXInc = (((int64_t)srcW << 16) + (dstW >> 1)) / dstW;
1223 c->
lumYInc = (((int64_t)srcH << 16) + (dstH >> 1)) / dstH;
1226 c->
vRounder = 4 * 0x0001000100010001ULL;
1228 usesVFilter = (srcFilter->
lumV && srcFilter->
lumV->
length > 1) ||
1232 usesHFilter = (srcFilter->
lumH && srcFilter->
lumH->
length > 1) ||
1250 && !(c->
flags & SWS_FAST_BILINEAR)
1252 av_log(c,
AV_LOG_DEBUG,
"Forcing full internal H chroma due to input having non subsampled chroma\n");
1269 if (!(flags & SWS_FULL_CHR_H_INT)) {
1272 "Desired dithering only supported in full chroma interpolation for destination format '%s'\n",
1278 if (flags & SWS_FULL_CHR_H_INT) {
1281 "Ordered dither is not supported in full chroma interpolation for destination format '%s'\n",
1288 if (!(flags & SWS_FULL_CHR_H_INT)) {
1290 "%s output is not supported with half chroma resolution, switching to full\n",
1299 if (flags & SWS_FULL_CHR_H_INT &&
1322 "full chroma interpolation for destination format '%s' not yet implemented\n",
1324 flags &= ~SWS_FULL_CHR_H_INT;
1327 if (
isAnyRGB(dstFormat) && !(flags & SWS_FULL_CHR_H_INT))
1348 (flags & SWS_FAST_BILINEAR)))
1379 "output width is not a multiple of 32 -> no MMXEXT scaler\n");
1396 if (flags & SWS_FAST_BILINEAR) {
1403 c->
lumXInc = ((int64_t)(srcW - 2) << 16) / (dstW - 2) - 20;
1413 if (!unscaled && c->
gamma_flag && (srcFormat != tmpFmt || dstFormat != tmpFmt)) {
1418 srcW, srcH, tmpFmt, 64);
1431 flags, srcFilter, dstFilter, c->
param);
1453 if (dstFormat != tmpFmt) {
1455 dstW, dstH, tmpFmt, 64);
1460 dstW, dstH, dstFormat,
1474 srcW, srcH, tmpFormat, 64);
1479 srcW, srcH, tmpFormat,
1485 dstW, dstH, dstFormat,
1498 dstFormat != tmpFormat ||
1499 usesHFilter || usesVFilter ||
1503 srcW, srcH, tmpFormat, 64);
1508 srcW, srcH, tmpFormat,
1518 dstW, dstH, dstFormat,
1519 flags, srcFilter, dstFilter, c->
param);
1526 #define USE_MMAP (HAVE_MMAP && HAVE_MPROTECT && defined MAP_ANONYMOUS)
1530 #if HAVE_MMXEXT_INLINE
1540 PROT_READ | PROT_WRITE,
1541 MAP_PRIVATE | MAP_ANONYMOUS,
1544 PROT_READ | PROT_WRITE,
1545 MAP_PRIVATE | MAP_ANONYMOUS,
1547 #elif HAVE_VIRTUALALLOC
1551 PAGE_EXECUTE_READWRITE);
1555 PAGE_EXECUTE_READWRITE);
1561 #ifdef MAP_ANONYMOUS
1591 const int filterAlign =
X86_MMX(cpu_flags) ? 4 :
1596 srcW, dstW, filterAlign, 1 << 14,
1598 cpu_flags, srcFilter->
lumH, dstFilter->
lumH,
1606 (flags & SWS_BICUBLIN) ? (flags |
SWS_BILINEAR) : flags,
1607 cpu_flags, srcFilter->
chrH, dstFilter->
chrH,
1617 const int filterAlign =
X86_MMX(cpu_flags) ? 2 :
1621 c->
lumYInc, srcH, dstH, filterAlign, (1 << 12),
1623 cpu_flags, srcFilter->
lumV, dstFilter->
lumV,
1630 filterAlign, (1 << 12),
1631 (flags & SWS_BICUBLIN) ? (flags |
SWS_BILINEAR) : flags,
1632 cpu_flags, srcFilter->
chrV, dstFilter->
chrV,
1645 short *p = (
short *)&c->vYCoeffsBank[i];
1646 for (j = 0; j < 8; j++)
1652 short *p = (
short *)&c->vCCoeffsBank[i];
1653 for (j = 0; j < 8; j++)
1662 for (i = 0; i < dstH; i++) {
1663 int chrI = (int64_t)i * c->
chrDstH / dstH;
1678 for (i = 0; i < 4; i++)
1693 dst_stride + 16,
fail);
1701 dst_stride * 2 + 32,
fail);
1709 dst_stride + 16,
fail);
1717 for(j=0; j<dst_stride/2+1; j++)
1720 for(j=0; j<dst_stride+1; j++)
1726 const char *scaler =
NULL, *cpucaps;
1729 if (flags & scale_algorithms[i].
flag) {
1735 scaler =
"ehh flags invalid?!";
1756 cpucaps =
"AltiVec";
1764 "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1767 "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
1773 if (unscaled && !usesHFilter && !usesVFilter &&
1781 if (flags & SWS_PRINT_INFO)
1783 "using alpha blendaway %s -> %s special converter\n",
1789 if (unscaled && !usesHFilter && !usesVFilter &&
1794 if (flags & SWS_PRINT_INFO)
1796 "using unscaled %s -> %s special converter\n",
1806 int tmpW = sqrt(srcW * (int64_t)dstW);
1807 int tmpH = sqrt(srcH * (int64_t)dstH);
1813 if (srcW*(int64_t)srcH <= 4LL*dstW*dstH)
1817 tmpW, tmpH, tmpFormat, 64);
1822 tmpW, tmpH, tmpFormat,
1828 dstW, dstH, dstFormat,
1839 int flags,
const double *param)
1855 c->
param[0] = param[0];
1856 c->
param[1] = param[1];
1865 SwsFilter *dstFilter,
const double *param)
1870 dstW, dstH, dstFormat,
1886 for (i=0; i<a->
length; i++)
1895 for (i=0; i<a->
length; i++)
1900 float lumaSharpen,
float chromaSharpen,
1901 float chromaHShift,
float chromaVShift,
1908 if (lumaGBlur != 0.0) {
1916 if (chromaGBlur != 0.0) {
1927 if (chromaSharpen != 0.0) {
1938 if (lumaSharpen != 0.0) {
1949 if (chromaHShift != 0.0)
1952 if (chromaVShift != 0.0)
2001 const int length = (int)(variance * quality + 0.5) | 1;
2003 double middle = (length - 1) * 0.5;
2006 if(variance < 0 || quality < 0)
2014 for (i = 0; i <
length; i++) {
2015 double dist = i - middle;
2016 vec->
coeff[i] = exp(-dist * dist / (2 * variance * variance)) /
2017 sqrt(2 * variance *
M_PI);
2033 for (i = 0; i <
length; i++)
2049 for (i = 0; i < a->
length; i++)
2059 for (i = 0; i < a->
length; i++)
2060 a->
coeff[i] *= scalar;
2077 for (i = 0; i < a->
length; i++) {
2078 for (j = 0; j < b->
length; j++) {
2095 for (i = 0; i < a->
length; i++)
2112 for (i = 0; i < a->
length; i++)
2130 for (i = 0; i < a->
length; i++) {
2131 vec->
coeff[i + (length - 1) / 2 -
2209 for (i = 0; i < a->
length; i++)
2210 if (a->
coeff[i] > max)
2213 for (i = 0; i < a->
length; i++)
2214 if (a->
coeff[i] < min)
2219 for (i = 0; i < a->
length; i++) {
2220 int x = (int)((a->
coeff[i] - min) * 60.0 / range + 0.5);
2221 av_log(log_ctx, log_level,
"%1.3f ", a->
coeff[i]);
2223 av_log(log_ctx, log_level,
" ");
2224 av_log(log_ctx, log_level,
"|\n");
2274 for (i = 0; i < 4; i++)
2297 #elif HAVE_VIRTUALALLOC
2334 const double *
param)
2342 param = default_param;
2345 (context->
srcW != srcW ||
2346 context->
srcH != srcH ||
2348 context->
dstW != dstW ||
2349 context->
dstH != dstH ||
2351 context->
flags != flags ||
2352 context->
param[0] != param[0] ||
2353 context->
param[1] != param[1])) {
2373 context->
param[0] = param[0];
2374 context->
param[1] = param[1];
packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
int16_t ** alpPixBuf
Ring buffer for scaled horizontal alpha plane lines to be fed to the vertical scaler.
int sws_isSupportedOutput(enum AVPixelFormat pix_fmt)
Return a positive value if pix_fmt is a supported output format, 0 otherwise.
static const FormatEntry format_entries[AV_PIX_FMT_NB]
planar YUV 4:2:2, 18bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
planar YUV 4:4:0,20bpp, (1 Cr & Cb sample per 1x2 Y samples), little-endian
planar YUV 4:4:4,42bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
static enum AVPixelFormat pix_fmt
static SwsVector * sws_sumVec(SwsVector *a, SwsVector *b)
av_cold void ff_yuv2rgb_init_tables_ppc(SwsContext *c, const int inv_table[4], int brightness, int contrast, int saturation)
static int shift(int a, int b)
static int handle_0alpha(enum AVPixelFormat *format)
planar YUV 4:2:0,21bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
#define SWS_SRC_V_CHR_DROP_MASK
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
int chrSrcH
Height of source chroma planes.
#define FF_ALLOCZ_ARRAY_OR_GOTO(ctx, p, nelem, elsize, label)
int ff_free_filters(SwsContext *c)
static av_always_inline int isPlanarRGB(enum AVPixelFormat pix_fmt)
#define LIBSWSCALE_VERSION_MICRO
uint8_t * chrMmxextFilterCode
Runtime-generated MMXEXT horizontal fast bilinear scaler code for chroma planes.
static void fill_rgb2yuv_table(SwsContext *c, const int table[4], int dstRange)
planar YUV 4:2:2,28bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
static int conv(int samples, float **pcm, char *buf, int channels)
packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is st...
uint8_t * lumMmxextFilterCode
Runtime-generated MMXEXT horizontal fast bilinear scaler code for luma/alpha planes.
planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
#define AV_LOG_WARNING
Something somehow does not look correct.
packed RGB 8:8:8, 24bpp, RGBRGB...
packed RGB 1:2:1 bitstream, 4bpp, (msb)1B 2G 1R(lsb), a byte contains two pixels, the first pixel in ...
static av_cold int get_local_pos(SwsContext *s, int chr_subsample, int pos, int dir)
int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)
int av_image_alloc(uint8_t *pointers[4], int linesizes[4], int w, int h, enum AVPixelFormat pix_fmt, int align)
Allocate an image with size w and h and pixel format pix_fmt, and fill pointers and linesizes accordi...
planar YUV 4:4:4, 27bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
SwsVector * sws_getGaussianVec(double variance, double quality)
Return a normalized Gaussian curve used to filter stuff quality = 3 is high quality, lower is lower quality.
planar YUV 4:4:4,36bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
bayer, GBGB..(odd line), RGRG..(even line), 8-bit samples */
void av_opt_set_defaults(void *s)
Set the values of all AVOption fields to their default values.
int vChrDrop
Binary logarithm of extra vertical subsampling factor in source image chroma planes specified by user...
bayer, GRGR..(odd line), BGBG..(even line), 8-bit samples */
int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4], int fullRange, int brightness, int contrast, int saturation)
packed RGBA 16:16:16:16, 64bpp, 16B, 16G, 16R, 16A, the 2-byte value for each R/G/B/A component is st...
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined ...
static double getSplineCoeff(double a, double b, double c, double d, double dist)
bayer, GRGR..(odd line), BGBG..(even line), 16-bit samples, little-endian */
int dstFormatBpp
Number of bits per pixel of the destination pixel format.
#define AV_PIX_FMT_BGRA64
planar YUV 4:4:4 40bpp, (1 Cr & Cb sample per 1x1 Y & A samples, little-endian)
static av_always_inline int is16BPS(enum AVPixelFormat pix_fmt)
static int handle_jpeg(enum AVPixelFormat *format)
int sws_isSupportedEndiannessConversion(enum AVPixelFormat pix_fmt)
static int isnan_vec(SwsVector *a)
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), little-endian
#define SWS_SRC_V_CHR_DROP_SHIFT
const char * swscale_configuration(void)
Return the libswscale build-time configuration.
planar GBR 4:4:4 36bpp, little-endian
The following 12 formats have the disadvantage of needing 1 format for each bit depth.
packed RGB 4:4:4, 16bpp, (msb)4X 4R 4G 4B(lsb), big-endian, X=unused/undefined
void sws_subVec(SwsVector *a, SwsVector *b)
packed BGR 8:8:8, 32bpp, XBGRXBGR... X=unused/undefined
int srcRange
0 = MPG YUV range, 1 = JPG YUV range (source image).
bayer, BGBG..(odd line), GRGR..(even line), 8-bit samples */
planar GBR 4:4:4 36bpp, big-endian
planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
packed RGB 1:2:1 bitstream, 4bpp, (msb)1R 2G 1B(lsb), a byte contains two pixels, the first pixel in ...
Macro definitions for various function/variable attributes.
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
int srcH
Height of source luma/alpha planes.
packed RGB 1:2:1, 8bpp, (msb)1B 2G 1R(lsb)
planar YUV 4:2:0 22.5bpp, (1 Cr & Cb sample per 2x2 Y & A samples), little-endian ...
planar GBRA 4:4:4:4 64bpp, big-endian
#define av_assert0(cond)
assert() equivalent, that is always enabled.
planar YUV 4:2:0 40bpp, (1 Cr & Cb sample per 2x2 Y & A samples, big-endian)
static uint16_t * alloc_gamma_tbl(double e)
const int32_t ff_yuv2rgb_coeffs[8][4]
planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
int chrDstVSubSample
Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in destination i...
ptrdiff_t uv_off
offset (in pixels) between u and v planes
AVComponentDescriptor comp[4]
Parameters that describe how pixels are packed.
int length
number of coefficients in the vector
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.
packed RGB 8:8:8, 32bpp, RGBXRGBX... X=unused/undefined
8 bit with AV_PIX_FMT_RGB32 palette
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as lit...
static av_always_inline av_const int isnan(float x)
int vChrFilterSize
Vertical filter size for chroma pixels.
bayer, GBGB..(odd line), RGRG..(even line), 16-bit samples, little-endian */
bayer, GBGB..(odd line), RGRG..(even line), 16-bit samples, big-endian */
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
int16_t ** lumPixBuf
Ring buffer for scaled horizontal luma plane lines to be fed to the vertical scaler.
packed RGB 4:4:4, 16bpp, (msb)4X 4R 4G 4B(lsb), little-endian, X=unused/undefined ...
void sws_addVec(SwsVector *a, SwsVector *b)
planar YUV 4:4:4,36bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
#define SWS_FULL_CHR_H_INT
int cascaded_tmpStride[4]
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), big-endian
packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
planar YUV 4:2:0 40bpp, (1 Cr & Cb sample per 2x2 Y & A samples, little-endian)
#define SWS_FAST_BILINEAR
planar YUV 4:4:0,20bpp, (1 Cr & Cb sample per 1x2 Y samples), big-endian
planar GBR 4:4:4 48bpp, big-endian
FF_ENABLE_DEPRECATION_WARNINGS enum AVPixelFormat av_pix_fmt_swap_endianness(enum AVPixelFormat pix_fmt)
Utility function to swap the endianness of a pixel format.
planar YUV 4:4:0 full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV440P and setting color_range...
SwsContext * sws_getContext(int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
Allocate and return an SwsContext.
planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV422P and setting col...
planar YUV 4:4:4 64bpp, (1 Cr & Cb sample per 1x1 Y & A samples, big-endian)
av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter, SwsFilter *dstFilter)
Initialize the swscaler context sws_context.
#define AV_LOG_VERBOSE
Detailed information.
int16_t rgb2xyz_matrix[3][4]
#define AV_PIX_FMT_YUV444P16
enum AVPixelFormat dstFormat
Destination pixel format.
int ff_sws_alphablendaway(SwsContext *c, const uint8_t *src[], int srcStride[], int srcSliceY, int srcSliceH, uint8_t *dst[], int dstStride[])
planar YUV 4:4:0,24bpp, (1 Cr & Cb sample per 1x2 Y samples), big-endian
bayer, BGBG..(odd line), GRGR..(even line), 16-bit samples, little-endian */
int chrSrcHSubSample
Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in source imag...
static av_always_inline int isYUV(enum AVPixelFormat pix_fmt)
static SwsVector * sws_getShiftedVec(SwsVector *a, int shift)
#define ROUNDED_DIV(a, b)
int32_t * vChrFilterPos
Array of vertical filter starting positions for each dst[i] for chroma planes.
int dstH
Height of destination luma/alpha planes.
planar YUV 4:2:0, 13.5bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
SwsFilter * sws_getDefaultFilter(float lumaGBlur, float chromaGBlur, float lumaSharpen, float chromaSharpen, float chromaHShift, float chromaVShift, int verbose)
planar GBR 4:4:4 27bpp, big-endian
#define INLINE_MMX(flags)
planar YUV 4:4:4, 30bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
planar YUV 4:2:2 24bpp, (1 Cr & Cb sample per 2x1 Y & A samples)
uint16_t depth_minus1
Number of bits in the component minus 1.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
16bit gray, 16bit alpha (big-endian)
int16_t ** chrVPixBuf
Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
int32_t * hChrFilterPos
Array of horizontal filter starting positions for each dst[i] for chroma planes.
planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
int hLumFilterSize
Horizontal filter size for luma/alpha pixels.
SwsFunc ff_getSwsFunc(SwsContext *c)
Return function pointer to fastest main scaler path function depending on architecture and available ...
const char * description
human-readable description
int av_pix_fmt_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
Utility function to access log2_chroma_w log2_chroma_h from the pixel format AVPixFmtDescriptor.
static const struct endianess table[]
#define PPC_ALTIVEC(flags)
#define SWS_MAX_REDUCE_CUTOFF
packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
planar YUV 4:4:4 36bpp, (1 Cr & Cb sample per 1x1 Y & A samples), big-endian
planar YUV 4:2:2, 20bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
int av_opt_set_int(void *obj, const char *name, int64_t val, int search_flags)
planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for the UV components, which are interleaved (firs...
simple assert() macros that are a bit more flexible than ISO C assert().
planar YUV 4:2:2,28bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
#define AV_PIX_FMT_YUV444P10
void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)
Print with av_log() a textual representation of the vector a if log_level <= av_log_level.
int vChrBufSize
Number of vertical chroma lines allocated in the ring buffer.
av_cold void sws_rgb2rgb_init(void)
planar YUV 4:4:4 36bpp, (1 Cr & Cb sample per 1x1 Y & A samples), little-endian
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
void sws_scaleVec(SwsVector *a, double scalar)
Scale all the coefficients of a by the scalar value.
int chrDstW
Width of destination chroma planes.
packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as lit...
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
uint8_t * cascaded1_tmp[4]
void sws_normalizeVec(SwsVector *a, double height)
Scale all the coefficients of a so that their sum equals height.
planar YUV 4:2:0 25bpp, (1 Cr & Cb sample per 2x2 Y & A samples, big-endian)
struct SwsContext * sws_getCachedContext(struct SwsContext *context, int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
Check if context can be reused, otherwise reallocate a new one.
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
#define RETCODE_USE_CASCADE
static enum AVPixelFormat alphaless_fmt(enum AVPixelFormat fmt)
int32_t * hLumFilterPos
Array of horizontal filter starting positions for each dst[i] for luma/alpha planes.
void sws_freeFilter(SwsFilter *filter)
int hChrFilterSize
Horizontal filter size for chroma pixels.
SwsVector * sws_allocVec(int length)
Allocate and return an uninitialized vector with length coefficients.
#define AV_PIX_FMT_YUV422P9
as above, but U and V bytes are swapped
int dstRange
0 = MPG YUV range, 1 = JPG YUV range (destination image).
ptrdiff_t uv_offx2
offset (in bytes) between u and v planes
#define AV_PIX_FMT_GBRP16
#define AV_PIX_FMT_GRAY16
packed RGB 1:2:1, 8bpp, (msb)1R 2G 1B(lsb)
planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV420P and setting col...
uint8_t * formatConvBuffer
#define INLINE_AMD3DNOW(flags)
int vLumBufSize
Number of vertical luma/alpha lines allocated in the ring buffer.
int16_t ** chrUPixBuf
Ring buffer for scaled horizontal chroma plane lines to be fed to the vertical scaler.
#define FF_CEIL_RSHIFT(a, b)
SwsVector * sws_getIdentityVec(void)
Allocate and return a vector with just one coefficient, with value 1.0.
void sws_freeContext(SwsContext *c)
Free the swscaler context swsContext.
planar YUV 4:4:4 40bpp, (1 Cr & Cb sample per 1x1 Y & A samples, big-endian)
packed YUV 4:2:2, 16bpp, Y0 Cr Y1 Cb
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
planar YUV 4:2:2 27bpp, (1 Cr & Cb sample per 2x1 Y & A samples), big-endian
packed RGB 8:8:8, 24bpp, BGRBGR...
planar YUV 4:2:0,18bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
packed XYZ 4:4:4, 36 bpp, (msb) 12X, 12Y, 12Z (lsb), the 2-byte value for each X/Y/Z is stored as big...
planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
av_cold void ff_sws_init_range_convert(SwsContext *c)
SwsContext * sws_alloc_set_opts(int srcW, int srcH, enum AVPixelFormat srcFormat, int dstW, int dstH, enum AVPixelFormat dstFormat, int flags, const double *param)
Allocate and return an SwsContext.
unsigned swscale_version(void)
int sws_setColorspaceDetails(struct SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation)
int srcColorspaceTable[4]
int dstW
Width of destination luma/alpha planes.
#define AV_PIX_FMT_YUV444P9
planar YUV 4:2:2, 18bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as big...
packed BGR 5:6:5, 16bpp, (msb) 5B 6G 5R(lsb), big-endian
uint8_t * cascaded_tmp[4]
#define FF_ARRAY_ELEMS(a)
static const ScaleAlgorithm scale_algorithms[]
int cascaded1_tmpStride[4]
#define AV_PIX_FMT_YUV420P16
int32_t * vLumFilterPos
Array of vertical filter starting positions for each dst[i] for luma/alpha planes.
#define AV_PIX_FMT_BGR555
int av_opt_get_int(void *obj, const char *name, int search_flags, int64_t *out_val)
packed RGB 3:3:2, 8bpp, (msb)2B 3G 3R(lsb)
double * coeff
pointer to the list of coefficients
int flag
flag associated to the algorithm
#define AV_LOG_INFO
Standard information.
planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
int dstColorspaceTable[4]
static av_cold int initFilter(int16_t **outFilter, int32_t **filterPos, int *outFilterSize, int xInc, int srcW, int dstW, int filterAlign, int one, int flags, int cpu_flags, SwsVector *srcFilter, SwsVector *dstFilter, double param[2], int srcPos, int dstPos)
void(* rgb15to16)(const uint8_t *src, uint8_t *dst, int src_size)
const AVClass * av_class
info on struct for av_log
int16_t xyz2rgb_matrix[3][4]
planar YUV 4:4:4 32bpp, (1 Cr & Cb sample per 1x1 Y & A samples)
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
bayer, RGRG..(odd line), GBGB..(even line), 16-bit samples, big-endian */
void sws_freeVec(SwsVector *a)
planar GBR 4:4:4 30bpp, big-endian
#define AV_CPU_FLAG_MMX
standard MMX
bayer, GRGR..(odd line), BGBG..(even line), 16-bit samples, big-endian */
planar YUV 4:2:2 48bpp, (1 Cr & Cb sample per 2x1 Y & A samples, big-endian)
int chrDstH
Height of destination chroma planes.
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
planar YUV 4:4:0,24bpp, (1 Cr & Cb sample per 1x2 Y samples), little-endian
planar GBR 4:4:4 42bpp, little-endian
#define SWS_ERROR_DIFFUSION
#define AV_PIX_FMT_YUV420P10
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
planar YUV 4:2:2 48bpp, (1 Cr & Cb sample per 2x1 Y & A samples, little-endian)
static SwsVector * sws_diffVec(SwsVector *a, SwsVector *b)
void sws_shiftVec(SwsVector *a, int shift)
int lumMmxextFilterCodeSize
Runtime-generated MMXEXT horizontal fast bilinear scaler code size for luma/alpha planes...
Describe the class of an AVClass context structure.
planar YUV 4:4:4 64bpp, (1 Cr & Cb sample per 1x1 Y & A samples, little-endian)
int ff_init_hscaler_mmxext(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits)
int vLumFilterSize
Vertical filter size for luma/alpha pixels.
static void handle_formats(SwsContext *c)
planar YUV 4:2:0,21bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
packed BGR 8:8:8, 32bpp, BGRXBGRX... X=unused/undefined
static av_always_inline av_const long int lrint(double x)
int chrMmxextFilterCodeSize
Runtime-generated MMXEXT horizontal fast bilinear scaler code size for chroma planes.
planar GBR 4:4:4 42bpp, big-endian
planar YUV 4:2:0 22.5bpp, (1 Cr & Cb sample per 2x2 Y & A samples), big-endian
#define AV_PIX_FMT_YUV420P9
packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb), little-endian, X=unused/undefined ...
int16_t * vChrFilter
Array of vertical filter coefficients for chroma planes.
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
SwsVector * sws_cloneVec(SwsVector *a)
Allocate and return a clone of the vector a, that is a vector with the same coefficients as a...
int ff_init_filters(SwsContext *c)
bayer, BGBG..(odd line), GRGR..(even line), 16-bit samples, big-endian */
int16_t * hLumFilter
Array of horizontal filter coefficients for luma/alpha planes.
SwsContext * sws_alloc_context(void)
Allocate an empty SwsContext.
#define AV_PIX_FMT_BGR565
planar YUV 4:2:2 30bpp, (1 Cr & Cb sample per 2x1 Y & A samples, little-endian)
#define AV_PIX_FMT_YUV422P10
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), big-endian , X=unused/undefined
bayer, RGRG..(odd line), GBGB..(even line), 16-bit samples, little-endian */
packed BGR 4:4:4, 16bpp, (msb)4X 4B 4G 4R(lsb), big-endian, X=unused/undefined
planar YUV 4:4:4, 27bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
static int handle_xyz(enum AVPixelFormat *format)
#define FF_ALLOC_ARRAY_OR_GOTO(ctx, p, nelem, elsize, label)
void sws_convVec(SwsVector *a, SwsVector *b)
const AVClass sws_context_class
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb...
#define INLINE_MMXEXT(flags)
static double sws_dcVec(SwsVector *a)
#define CONFIG_SWSCALE_ALPHA
static void filter(MpegAudioContext *s, int ch, const short *samples, int incr)
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
planar YUV 4:2:2,24bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
double param[2]
Input parameters for scaling algorithms that need them.
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb...
planar GBRA 4:4:4:4 32bpp
#define FF_ALLOC_OR_GOTO(ctx, p, size, label)
planar GBR 4:4:4 27bpp, little-endian
packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as big...
enum AVPixelFormat srcFormat
Source pixel format.
planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of AV_PIX_FMT_YUV444P and setting col...
bayer, RGRG..(odd line), GBGB..(even line), 8-bit samples */
packed RGB 3:3:2, 8bpp, (msb)2R 3G 3B(lsb)
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
planar YUV 4:2:0 25bpp, (1 Cr & Cb sample per 2x2 Y & A samples, little-endian)
#define FFMPEG_CONFIGURATION
struct SwsContext * cascaded_context[3]
#define SWS_PARAM_DEFAULT
#define SWS_FULL_CHR_H_INP
SwsFunc swscale
Note that src, dst, srcStride, dstStride will be copied in the sws_scale() wrapper so they can be fre...
static av_always_inline int diff(const uint32_t a, const uint32_t b)
packed XYZ 4:4:4, 36 bpp, (msb) 12X, 12Y, 12Z (lsb), the 2-byte value for each X/Y/Z is stored as lit...
int size_factor
size factor used when initing the filters
planar YUV 4:4:4,42bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
int srcFormatBpp
Number of bits per pixel of the source pixel format.
Y , 16bpp, little-endian.
uint8_t is_supported_endianness
static const double coeff[2][5]
planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) full scale (JPEG), deprecated in favor ...
16bit gray, 16bit alpha (little-endian)
int sws_isSupportedInput(enum AVPixelFormat pix_fmt)
Return a positive value if pix_fmt is a supported input format, 0 otherwise.
planar YUV 4:2:2 30bpp, (1 Cr & Cb sample per 2x1 Y & A samples, big-endian)
int32_t input_rgb2yuv_table[16+40 *4]
packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb), big-endian , X=unused/undefined
number of pixel formats, DO NOT USE THIS if you want to link with shared libav* because the number of...
int16_t * vLumFilter
Array of vertical filter coefficients for luma/alpha planes.
SwsVector * sws_getConstVec(double c, int length)
Allocate and return a vector with length coefficients, all with the same value c. ...
planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
planar GBR 4:4:4 48bpp, little-endian
static void makenan_vec(SwsVector *a)
int16_t * hChrFilter
Array of horizontal filter coefficients for chroma planes.
#define av_malloc_array(a, b)
packed BGR 4:4:4, 16bpp, (msb)4X 4B 4G 4R(lsb), little-endian, X=unused/undefined ...
const char * av_get_pix_fmt_name(enum AVPixelFormat pix_fmt)
Return the short name for a pixel format, NULL in case pix_fmt is unknown.
planar YUV 4:2:2 27bpp, (1 Cr & Cb sample per 2x1 Y & A samples), little-endian
int chrDstHSubSample
Binary logarithm of horizontal subsampling factor between luma/alpha and chroma planes in destination...
int chrSrcW
Width of source chroma planes.
void ff_get_unscaled_swscale(SwsContext *c)
Set c->swscale to an unscaled converter if one exists for the specific source and destination formats...
planar GBRA 4:4:4:4 64bpp, little-endian
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
int srcW
Width of source luma/alpha planes.
packed YUV 4:1:1, 12bpp, Cb Y0 Y1 Cr Y2 Y3
static void fill_xyztables(struct SwsContext *c)
int chrSrcVSubSample
Binary logarithm of vertical subsampling factor between luma/alpha and chroma planes in source image...
int flags
Flags passed by the user to select scaler algorithm, optimizations, subsampling, etc...
AVPixelFormat
Pixel format.
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
planar YUV 4:2:0,18bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
#define AV_PIX_FMT_YUV422P16
planar YUV 4:4:4, 30bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
planar YUV 4:2:2,24bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
#define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)
planar GBR 4:4:4 30bpp, little-endian
static SwsVector * sws_getConvVec(SwsVector *a, SwsVector *b)
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
#define LIBSWSCALE_VERSION_INT
packed AYUV 4:4:4,64bpp (1 Cr & Cb sample per 1x1 Y & A samples), little-endian
planar YUV 4:2:2, 20bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
const char * swscale_license(void)
Return the libswscale license.