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utils.c
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/*
* Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#define _SVID_SOURCE // needed for MAP_ANONYMOUS
#define _DARWIN_C_SOURCE // needed for MAP_ANON
#include <inttypes.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
#if HAVE_SYS_MMAN_H
#include <sys/mman.h>
#if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
#define MAP_ANONYMOUS MAP_ANON
#endif
#endif
#if HAVE_VIRTUALALLOC
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif
#include "libavutil/attributes.h"
#include "libavutil/avassert.h"
#include "libavutil/avutil.h"
#include "libavutil/bswap.h"
#include "libavutil/cpu.h"
#include "libavutil/imgutils.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/ppc/cpu.h"
#include "libavutil/x86/asm.h"
#include "libavutil/x86/cpu.h"
#include "rgb2rgb.h"
#include "swscale.h"
#include "swscale_internal.h"
static void handle_formats(SwsContext *c);
unsigned swscale_version(void)
{
av_assert0(LIBSWSCALE_VERSION_MICRO >= 100);
return LIBSWSCALE_VERSION_INT;
}
const char *swscale_configuration(void)
{
return FFMPEG_CONFIGURATION;
}
const char *swscale_license(void)
{
#define LICENSE_PREFIX "libswscale license: "
return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;
}
typedef struct FormatEntry {
uint8_t is_supported_in :1;
uint8_t is_supported_out :1;
uint8_t is_supported_endianness :1;
} FormatEntry;
static const FormatEntry format_entries[AV_PIX_FMT_NB] = {
[AV_PIX_FMT_YUV420P] = { 1, 1 },
[AV_PIX_FMT_YUYV422] = { 1, 1 },
[AV_PIX_FMT_RGB24] = { 1, 1 },
[AV_PIX_FMT_BGR24] = { 1, 1 },
[AV_PIX_FMT_YUV422P] = { 1, 1 },
[AV_PIX_FMT_YUV444P] = { 1, 1 },
[AV_PIX_FMT_YUV410P] = { 1, 1 },
[AV_PIX_FMT_YUV411P] = { 1, 1 },
[AV_PIX_FMT_GRAY8] = { 1, 1 },
[AV_PIX_FMT_MONOWHITE] = { 1, 1 },
[AV_PIX_FMT_MONOBLACK] = { 1, 1 },
[AV_PIX_FMT_PAL8] = { 1, 0 },
[AV_PIX_FMT_YUVJ420P] = { 1, 1 },
[AV_PIX_FMT_YUVJ411P] = { 1, 1 },
[AV_PIX_FMT_YUVJ422P] = { 1, 1 },
[AV_PIX_FMT_YUVJ444P] = { 1, 1 },
[AV_PIX_FMT_YVYU422] = { 1, 1 },
[AV_PIX_FMT_UYVY422] = { 1, 1 },
[AV_PIX_FMT_UYYVYY411] = { 0, 0 },
[AV_PIX_FMT_BGR8] = { 1, 1 },
[AV_PIX_FMT_BGR4] = { 0, 1 },
[AV_PIX_FMT_BGR4_BYTE] = { 1, 1 },
[AV_PIX_FMT_RGB8] = { 1, 1 },
[AV_PIX_FMT_RGB4] = { 0, 1 },
[AV_PIX_FMT_RGB4_BYTE] = { 1, 1 },
[AV_PIX_FMT_NV12] = { 1, 1 },
[AV_PIX_FMT_NV21] = { 1, 1 },
[AV_PIX_FMT_ARGB] = { 1, 1 },
[AV_PIX_FMT_RGBA] = { 1, 1 },
[AV_PIX_FMT_ABGR] = { 1, 1 },
[AV_PIX_FMT_BGRA] = { 1, 1 },
[AV_PIX_FMT_0RGB] = { 1, 1 },
[AV_PIX_FMT_RGB0] = { 1, 1 },
[AV_PIX_FMT_0BGR] = { 1, 1 },
[AV_PIX_FMT_BGR0] = { 1, 1 },
[AV_PIX_FMT_GRAY16BE] = { 1, 1 },
[AV_PIX_FMT_GRAY16LE] = { 1, 1 },
[AV_PIX_FMT_YUV440P] = { 1, 1 },
[AV_PIX_FMT_YUVJ440P] = { 1, 1 },
[AV_PIX_FMT_YUVA420P] = { 1, 1 },
[AV_PIX_FMT_YUVA422P] = { 1, 1 },
[AV_PIX_FMT_YUVA444P] = { 1, 1 },
[AV_PIX_FMT_YUVA420P9BE] = { 1, 1 },
[AV_PIX_FMT_YUVA420P9LE] = { 1, 1 },
[AV_PIX_FMT_YUVA422P9BE] = { 1, 1 },
[AV_PIX_FMT_YUVA422P9LE] = { 1, 1 },
[AV_PIX_FMT_YUVA444P9BE] = { 1, 1 },
[AV_PIX_FMT_YUVA444P9LE] = { 1, 1 },
[AV_PIX_FMT_YUVA420P10BE]= { 1, 1 },
[AV_PIX_FMT_YUVA420P10LE]= { 1, 1 },
[AV_PIX_FMT_YUVA422P10BE]= { 1, 1 },
[AV_PIX_FMT_YUVA422P10LE]= { 1, 1 },
[AV_PIX_FMT_YUVA444P10BE]= { 1, 1 },
[AV_PIX_FMT_YUVA444P10LE]= { 1, 1 },
[AV_PIX_FMT_YUVA420P16BE]= { 1, 1 },
[AV_PIX_FMT_YUVA420P16LE]= { 1, 1 },
[AV_PIX_FMT_YUVA422P16BE]= { 1, 1 },
[AV_PIX_FMT_YUVA422P16LE]= { 1, 1 },
[AV_PIX_FMT_YUVA444P16BE]= { 1, 1 },
[AV_PIX_FMT_YUVA444P16LE]= { 1, 1 },
[AV_PIX_FMT_RGB48BE] = { 1, 1 },
[AV_PIX_FMT_RGB48LE] = { 1, 1 },
[AV_PIX_FMT_RGBA64BE] = { 1, 1, 1 },
[AV_PIX_FMT_RGBA64LE] = { 1, 1, 1 },
[AV_PIX_FMT_RGB565BE] = { 1, 1 },
[AV_PIX_FMT_RGB565LE] = { 1, 1 },
[AV_PIX_FMT_RGB555BE] = { 1, 1 },
[AV_PIX_FMT_RGB555LE] = { 1, 1 },
[AV_PIX_FMT_BGR565BE] = { 1, 1 },
[AV_PIX_FMT_BGR565LE] = { 1, 1 },
[AV_PIX_FMT_BGR555BE] = { 1, 1 },
[AV_PIX_FMT_BGR555LE] = { 1, 1 },
[AV_PIX_FMT_YUV420P16LE] = { 1, 1 },
[AV_PIX_FMT_YUV420P16BE] = { 1, 1 },
[AV_PIX_FMT_YUV422P16LE] = { 1, 1 },
[AV_PIX_FMT_YUV422P16BE] = { 1, 1 },
[AV_PIX_FMT_YUV444P16LE] = { 1, 1 },
[AV_PIX_FMT_YUV444P16BE] = { 1, 1 },
[AV_PIX_FMT_RGB444LE] = { 1, 1 },
[AV_PIX_FMT_RGB444BE] = { 1, 1 },
[AV_PIX_FMT_BGR444LE] = { 1, 1 },
[AV_PIX_FMT_BGR444BE] = { 1, 1 },
[AV_PIX_FMT_YA8] = { 1, 0 },
[AV_PIX_FMT_YA16BE] = { 1, 0 },
[AV_PIX_FMT_YA16LE] = { 1, 0 },
[AV_PIX_FMT_BGR48BE] = { 1, 1 },
[AV_PIX_FMT_BGR48LE] = { 1, 1 },
[AV_PIX_FMT_BGRA64BE] = { 1, 1, 1 },
[AV_PIX_FMT_BGRA64LE] = { 1, 1, 1 },
[AV_PIX_FMT_YUV420P9BE] = { 1, 1 },
[AV_PIX_FMT_YUV420P9LE] = { 1, 1 },
[AV_PIX_FMT_YUV420P10BE] = { 1, 1 },
[AV_PIX_FMT_YUV420P10LE] = { 1, 1 },
[AV_PIX_FMT_YUV420P12BE] = { 1, 1 },
[AV_PIX_FMT_YUV420P12LE] = { 1, 1 },
[AV_PIX_FMT_YUV420P14BE] = { 1, 1 },
[AV_PIX_FMT_YUV420P14LE] = { 1, 1 },
[AV_PIX_FMT_YUV422P9BE] = { 1, 1 },
[AV_PIX_FMT_YUV422P9LE] = { 1, 1 },
[AV_PIX_FMT_YUV422P10BE] = { 1, 1 },
[AV_PIX_FMT_YUV422P10LE] = { 1, 1 },
[AV_PIX_FMT_YUV422P12BE] = { 1, 1 },
[AV_PIX_FMT_YUV422P12LE] = { 1, 1 },
[AV_PIX_FMT_YUV422P14BE] = { 1, 1 },
[AV_PIX_FMT_YUV422P14LE] = { 1, 1 },
[AV_PIX_FMT_YUV444P9BE] = { 1, 1 },
[AV_PIX_FMT_YUV444P9LE] = { 1, 1 },
[AV_PIX_FMT_YUV444P10BE] = { 1, 1 },
[AV_PIX_FMT_YUV444P10LE] = { 1, 1 },
[AV_PIX_FMT_YUV444P12BE] = { 1, 1 },
[AV_PIX_FMT_YUV444P12LE] = { 1, 1 },
[AV_PIX_FMT_YUV444P14BE] = { 1, 1 },
[AV_PIX_FMT_YUV444P14LE] = { 1, 1 },
[AV_PIX_FMT_GBRP] = { 1, 1 },
[AV_PIX_FMT_GBRP9LE] = { 1, 1 },
[AV_PIX_FMT_GBRP9BE] = { 1, 1 },
[AV_PIX_FMT_GBRP10LE] = { 1, 1 },
[AV_PIX_FMT_GBRP10BE] = { 1, 1 },
[AV_PIX_FMT_GBRP12LE] = { 1, 1 },
[AV_PIX_FMT_GBRP12BE] = { 1, 1 },
[AV_PIX_FMT_GBRP14LE] = { 1, 1 },
[AV_PIX_FMT_GBRP14BE] = { 1, 1 },
[AV_PIX_FMT_GBRP16LE] = { 1, 0 },
[AV_PIX_FMT_GBRP16BE] = { 1, 0 },
[AV_PIX_FMT_XYZ12BE] = { 1, 1, 1 },
[AV_PIX_FMT_XYZ12LE] = { 1, 1, 1 },
[AV_PIX_FMT_GBRAP] = { 1, 1 },
[AV_PIX_FMT_GBRAP16LE] = { 1, 0 },
[AV_PIX_FMT_GBRAP16BE] = { 1, 0 },
[AV_PIX_FMT_BAYER_BGGR8] = { 1, 0 },
[AV_PIX_FMT_BAYER_RGGB8] = { 1, 0 },
[AV_PIX_FMT_BAYER_GBRG8] = { 1, 0 },
[AV_PIX_FMT_BAYER_GRBG8] = { 1, 0 },
[AV_PIX_FMT_BAYER_BGGR16LE] = { 1, 0 },
[AV_PIX_FMT_BAYER_BGGR16BE] = { 1, 0 },
[AV_PIX_FMT_BAYER_RGGB16LE] = { 1, 0 },
[AV_PIX_FMT_BAYER_RGGB16BE] = { 1, 0 },
[AV_PIX_FMT_BAYER_GBRG16LE] = { 1, 0 },
[AV_PIX_FMT_BAYER_GBRG16BE] = { 1, 0 },
[AV_PIX_FMT_BAYER_GRBG16LE] = { 1, 0 },
[AV_PIX_FMT_BAYER_GRBG16BE] = { 1, 0 },
};
int sws_isSupportedInput(enum AVPixelFormat pix_fmt)
{
return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
format_entries[pix_fmt].is_supported_in : 0;
}
int sws_isSupportedOutput(enum AVPixelFormat pix_fmt)
{
return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
format_entries[pix_fmt].is_supported_out : 0;
}
int sws_isSupportedEndiannessConversion(enum AVPixelFormat pix_fmt)
{
return (unsigned)pix_fmt < AV_PIX_FMT_NB ?
format_entries[pix_fmt].is_supported_endianness : 0;
}
static double getSplineCoeff(double a, double b, double c, double d,
double dist)
{
if (dist <= 1.0)
return ((d * dist + c) * dist + b) * dist + a;
else
return getSplineCoeff(0.0,
b + 2.0 * c + 3.0 * d,
c + 3.0 * d,
-b - 3.0 * c - 6.0 * d,
dist - 1.0);
}
static av_cold int get_local_pos(SwsContext *s, int chr_subsample, int pos, int dir)
{
if (pos == -1 || pos <= -513) {
pos = (128 << chr_subsample) - 128;
}
pos += 128; // relative to ideal left edge
return pos >> chr_subsample;
}
typedef struct {
int flag; ///< flag associated to the algorithm
const char *description; ///< human-readable description
int size_factor; ///< size factor used when initing the filters
} ScaleAlgorithm;
static const ScaleAlgorithm scale_algorithms[] = {
{ SWS_AREA, "area averaging", 1 /* downscale only, for upscale it is bilinear */ },
{ SWS_BICUBIC, "bicubic", 4 },
{ SWS_BICUBLIN, "luma bicubic / chroma bilinear", -1 },
{ SWS_BILINEAR, "bilinear", 2 },
{ SWS_FAST_BILINEAR, "fast bilinear", -1 },
{ SWS_GAUSS, "Gaussian", 8 /* infinite ;) */ },
{ SWS_LANCZOS, "Lanczos", -1 /* custom */ },
{ SWS_POINT, "nearest neighbor / point", -1 },
{ SWS_SINC, "sinc", 20 /* infinite ;) */ },
{ SWS_SPLINE, "bicubic spline", 20 /* infinite :)*/ },
{ SWS_X, "experimental", 8 },
};
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)
{
int i;
int filterSize;
int filter2Size;
int minFilterSize;
int64_t *filter = NULL;
int64_t *filter2 = NULL;
const int64_t fone = 1LL << (54 - FFMIN(av_log2(srcW/dstW), 8));
int ret = -1;
emms_c(); // FIXME should not be required but IS (even for non-MMX versions)
// NOTE: the +3 is for the MMX(+1) / SSE(+3) scaler which reads over the end
FF_ALLOC_ARRAY_OR_GOTO(NULL, *filterPos, (dstW + 3), sizeof(**filterPos), fail);
if (FFABS(xInc - 0x10000) < 10 && srcPos == dstPos) { // unscaled
int i;
filterSize = 1;
FF_ALLOCZ_ARRAY_OR_GOTO(NULL, filter,
dstW, sizeof(*filter) * filterSize, fail);
for (i = 0; i < dstW; i++) {
filter[i * filterSize] = fone;
(*filterPos)[i] = i;
}
} else if (flags & SWS_POINT) { // lame looking point sampling mode
int i;
int64_t xDstInSrc;
filterSize = 1;
FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
dstW, sizeof(*filter) * filterSize, fail);
xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
for (i = 0; i < dstW; i++) {
int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
(*filterPos)[i] = xx;
filter[i] = fone;
xDstInSrc += xInc;
}
} else if ((xInc <= (1 << 16) && (flags & SWS_AREA)) ||
(flags & SWS_FAST_BILINEAR)) { // bilinear upscale
int i;
int64_t xDstInSrc;
filterSize = 2;
FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
dstW, sizeof(*filter) * filterSize, fail);
xDstInSrc = ((dstPos*(int64_t)xInc)>>8) - ((srcPos*0x8000LL)>>7);
for (i = 0; i < dstW; i++) {
int xx = (xDstInSrc - ((filterSize - 1) << 15) + (1 << 15)) >> 16;
int j;
(*filterPos)[i] = xx;
// bilinear upscale / linear interpolate / area averaging
for (j = 0; j < filterSize; j++) {
int64_t coeff= fone - FFABS(((int64_t)xx<<16) - xDstInSrc)*(fone>>16);
if (coeff < 0)
coeff = 0;
filter[i * filterSize + j] = coeff;
xx++;
}
xDstInSrc += xInc;
}
} else {
int64_t xDstInSrc;
int sizeFactor = -1;
for (i = 0; i < FF_ARRAY_ELEMS(scale_algorithms); i++) {
if (flags & scale_algorithms[i].flag && scale_algorithms[i].size_factor > 0) {
sizeFactor = scale_algorithms[i].size_factor;
break;
}
}
if (flags & SWS_LANCZOS)
sizeFactor = param[0] != SWS_PARAM_DEFAULT ? ceil(2 * param[0]) : 6;
av_assert0(sizeFactor > 0);
if (xInc <= 1 << 16)
filterSize = 1 + sizeFactor; // upscale
else
filterSize = 1 + (sizeFactor * srcW + dstW - 1) / dstW;
filterSize = FFMIN(filterSize, srcW - 2);
filterSize = FFMAX(filterSize, 1);
FF_ALLOC_ARRAY_OR_GOTO(NULL, filter,
dstW, sizeof(*filter) * filterSize, fail);
xDstInSrc = ((dstPos*(int64_t)xInc)>>7) - ((srcPos*0x10000LL)>>7);
for (i = 0; i < dstW; i++) {
int xx = (xDstInSrc - ((int64_t)(filterSize - 2) << 16)) / (1 << 17);
int j;
(*filterPos)[i] = xx;
for (j = 0; j < filterSize; j++) {
int64_t d = (FFABS(((int64_t)xx << 17) - xDstInSrc)) << 13;
double floatd;
int64_t coeff;
if (xInc > 1 << 16)
d = d * dstW / srcW;
floatd = d * (1.0 / (1 << 30));
if (flags & SWS_BICUBIC) {
int64_t B = (param[0] != SWS_PARAM_DEFAULT ? param[0] : 0) * (1 << 24);
int64_t C = (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1 << 24);
if (d >= 1LL << 31) {
coeff = 0.0;
} else {
int64_t dd = (d * d) >> 30;
int64_t ddd = (dd * d) >> 30;
if (d < 1LL << 30)
coeff = (12 * (1 << 24) - 9 * B - 6 * C) * ddd +
(-18 * (1 << 24) + 12 * B + 6 * C) * dd +
(6 * (1 << 24) - 2 * B) * (1 << 30);
else
coeff = (-B - 6 * C) * ddd +
(6 * B + 30 * C) * dd +
(-12 * B - 48 * C) * d +
(8 * B + 24 * C) * (1 << 30);
}
coeff /= (1LL<<54)/fone;
}
#if 0
else if (flags & SWS_X) {
double p = param ? param * 0.01 : 0.3;
coeff = d ? sin(d * M_PI) / (d * M_PI) : 1.0;
coeff *= pow(2.0, -p * d * d);
}
#endif
else if (flags & SWS_X) {
double A = param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
double c;
if (floatd < 1.0)
c = cos(floatd * M_PI);
else
c = -1.0;
if (c < 0.0)
c = -pow(-c, A);
else
c = pow(c, A);
coeff = (c * 0.5 + 0.5) * fone;
} else if (flags & SWS_AREA) {
int64_t d2 = d - (1 << 29);
if (d2 * xInc < -(1LL << (29 + 16)))
coeff = 1.0 * (1LL << (30 + 16));
else if (d2 * xInc < (1LL << (29 + 16)))
coeff = -d2 * xInc + (1LL << (29 + 16));
else
coeff = 0.0;
coeff *= fone >> (30 + 16);
} else if (flags & SWS_GAUSS) {
double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
coeff = (pow(2.0, -p * floatd * floatd)) * fone;
} else if (flags & SWS_SINC) {
coeff = (d ? sin(floatd * M_PI) / (floatd * M_PI) : 1.0) * fone;
} else if (flags & SWS_LANCZOS) {
double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
coeff = (d ? sin(floatd * M_PI) * sin(floatd * M_PI / p) /
(floatd * floatd * M_PI * M_PI / p) : 1.0) * fone;
if (floatd > p)
coeff = 0;
} else if (flags & SWS_BILINEAR) {
coeff = (1 << 30) - d;
if (coeff < 0)
coeff = 0;
coeff *= fone >> 30;
} else if (flags & SWS_SPLINE) {
double p = -2.196152422706632;
coeff = getSplineCoeff(1.0, 0.0, p, -p - 1.0, floatd) * fone;
} else {
av_assert0(0);
}
filter[i * filterSize + j] = coeff;
xx++;
}
xDstInSrc += 2 * xInc;
}
}
/* apply src & dst Filter to filter -> filter2
* av_free(filter);
*/
av_assert0(filterSize > 0);
filter2Size = filterSize;
if (srcFilter)
filter2Size += srcFilter->length - 1;
if (dstFilter)
filter2Size += dstFilter->length - 1;
av_assert0(filter2Size > 0);
FF_ALLOCZ_ARRAY_OR_GOTO(NULL, filter2, dstW, filter2Size * sizeof(*filter2), fail);
for (i = 0; i < dstW; i++) {
int j, k;
if (srcFilter) {
for (k = 0; k < srcFilter->length; k++) {
for (j = 0; j < filterSize; j++)
filter2[i * filter2Size + k + j] +=
srcFilter->coeff[k] * filter[i * filterSize + j];
}
} else {
for (j = 0; j < filterSize; j++)
filter2[i * filter2Size + j] = filter[i * filterSize + j];
}
// FIXME dstFilter
(*filterPos)[i] += (filterSize - 1) / 2 - (filter2Size - 1) / 2;
}
av_freep(&filter);
/* try to reduce the filter-size (step1 find size and shift left) */
// Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).
minFilterSize = 0;
for (i = dstW - 1; i >= 0; i--) {
int min = filter2Size;
int j;
int64_t cutOff = 0.0;
/* get rid of near zero elements on the left by shifting left */
for (j = 0; j < filter2Size; j++) {
int k;
cutOff += FFABS(filter2[i * filter2Size]);
if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone)
break;
/* preserve monotonicity because the core can't handle the
* filter otherwise */
if (i < dstW - 1 && (*filterPos)[i] >= (*filterPos)[i + 1])
break;
// move filter coefficients left
for (k = 1; k < filter2Size; k++)
filter2[i * filter2Size + k - 1] = filter2[i * filter2Size + k];
filter2[i * filter2Size + k - 1] = 0;
(*filterPos)[i]++;
}
cutOff = 0;
/* count near zeros on the right */
for (j = filter2Size - 1; j > 0; j--) {
cutOff += FFABS(filter2[i * filter2Size + j]);
if (cutOff > SWS_MAX_REDUCE_CUTOFF * fone)
break;
min--;
}
if (min > minFilterSize)
minFilterSize = min;
}
if (PPC_ALTIVEC(cpu_flags)) {
// we can handle the special case 4, so we don't want to go the full 8
if (minFilterSize < 5)
filterAlign = 4;
/* We really don't want to waste our time doing useless computation, so
* fall back on the scalar C code for very small filters.
* Vectorizing is worth it only if you have a decent-sized vector. */
if (minFilterSize < 3)
filterAlign = 1;
}
if (HAVE_MMX && cpu_flags & AV_CPU_FLAG_MMX) {
// special case for unscaled vertical filtering
if (minFilterSize == 1 && filterAlign == 2)
filterAlign = 1;
}
av_assert0(minFilterSize > 0);
filterSize = (minFilterSize + (filterAlign - 1)) & (~(filterAlign - 1));
av_assert0(filterSize > 0);
filter = av_malloc_array(dstW, filterSize * sizeof(*filter));
if (!filter)
goto fail;
if (filterSize >= MAX_FILTER_SIZE * 16 /
((flags & SWS_ACCURATE_RND) ? APCK_SIZE : 16)) {
ret = RETCODE_USE_CASCADE;
goto fail;
}
*outFilterSize = filterSize;
if (flags & SWS_PRINT_INFO)
av_log(NULL, AV_LOG_VERBOSE,
"SwScaler: reducing / aligning filtersize %d -> %d\n",
filter2Size, filterSize);
/* try to reduce the filter-size (step2 reduce it) */
for (i = 0; i < dstW; i++) {
int j;
for (j = 0; j < filterSize; j++) {
if (j >= filter2Size)
filter[i * filterSize + j] = 0;
else
filter[i * filterSize + j] = filter2[i * filter2Size + j];
if ((flags & SWS_BITEXACT) && j >= minFilterSize)
filter[i * filterSize + j] = 0;
}
}
// FIXME try to align filterPos if possible
// fix borders
for (i = 0; i < dstW; i++) {
int j;
if ((*filterPos)[i] < 0) {
// move filter coefficients left to compensate for filterPos
for (j = 1; j < filterSize; j++) {
int left = FFMAX(j + (*filterPos)[i], 0);
filter[i * filterSize + left] += filter[i * filterSize + j];
filter[i * filterSize + j] = 0;
}
(*filterPos)[i]= 0;
}
if ((*filterPos)[i] + filterSize > srcW) {
int shift = (*filterPos)[i] + filterSize - srcW;
// move filter coefficients right to compensate for filterPos
for (j = filterSize - 2; j >= 0; j--) {
int right = FFMIN(j + shift, filterSize - 1);
filter[i * filterSize + right] += filter[i * filterSize + j];
filter[i * filterSize + j] = 0;
}
(*filterPos)[i]= srcW - filterSize;
}
}
// Note the +1 is for the MMX scaler which reads over the end
/* align at 16 for AltiVec (needed by hScale_altivec_real) */
FF_ALLOCZ_ARRAY_OR_GOTO(NULL, *outFilter,
(dstW + 3), *outFilterSize * sizeof(int16_t), fail);
/* normalize & store in outFilter */
for (i = 0; i < dstW; i++) {
int j;
int64_t error = 0;
int64_t sum = 0;
for (j = 0; j < filterSize; j++) {
sum += filter[i * filterSize + j];
}
sum = (sum + one / 2) / one;
if (!sum) {
av_log(NULL, AV_LOG_WARNING, "SwScaler: zero vector in scaling\n");
sum = 1;
}
for (j = 0; j < *outFilterSize; j++) {
int64_t v = filter[i * filterSize + j] + error;
int intV = ROUNDED_DIV(v, sum);
(*outFilter)[i * (*outFilterSize) + j] = intV;
error = v - intV * sum;
}
}
(*filterPos)[dstW + 0] =
(*filterPos)[dstW + 1] =
(*filterPos)[dstW + 2] = (*filterPos)[dstW - 1]; /* the MMX/SSE scaler will
* read over the end */
for (i = 0; i < *outFilterSize; i++) {
int k = (dstW - 1) * (*outFilterSize) + i;
(*outFilter)[k + 1 * (*outFilterSize)] =
(*outFilter)[k + 2 * (*outFilterSize)] =
(*outFilter)[k + 3 * (*outFilterSize)] = (*outFilter)[k];
}
ret = 0;
fail:
if(ret < 0)
av_log(NULL, ret == RETCODE_USE_CASCADE ? AV_LOG_DEBUG : AV_LOG_ERROR, "sws: initFilter failed\n");
av_free(filter);
av_free(filter2);
return ret;
}
static void fill_rgb2yuv_table(SwsContext *c, const int table[4], int dstRange)
{
int64_t W, V, Z, Cy, Cu, Cv;
int64_t vr = table[0];
int64_t ub = table[1];
int64_t ug = -table[2];
int64_t vg = -table[3];
int64_t ONE = 65536;
int64_t cy = ONE;
uint8_t *p = (uint8_t*)c->input_rgb2yuv_table;
int i;
static const int8_t map[] = {
BY_IDX, GY_IDX, -1 , BY_IDX, BY_IDX, GY_IDX, -1 , BY_IDX,
RY_IDX, -1 , GY_IDX, RY_IDX, RY_IDX, -1 , GY_IDX, RY_IDX,
RY_IDX, GY_IDX, -1 , RY_IDX, RY_IDX, GY_IDX, -1 , RY_IDX,
BY_IDX, -1 , GY_IDX, BY_IDX, BY_IDX, -1 , GY_IDX, BY_IDX,
BU_IDX, GU_IDX, -1 , BU_IDX, BU_IDX, GU_IDX, -1 , BU_IDX,
RU_IDX, -1 , GU_IDX, RU_IDX, RU_IDX, -1 , GU_IDX, RU_IDX,
RU_IDX, GU_IDX, -1 , RU_IDX, RU_IDX, GU_IDX, -1 , RU_IDX,
BU_IDX, -1 , GU_IDX, BU_IDX, BU_IDX, -1 , GU_IDX, BU_IDX,
BV_IDX, GV_IDX, -1 , BV_IDX, BV_IDX, GV_IDX, -1 , BV_IDX,
RV_IDX, -1 , GV_IDX, RV_IDX, RV_IDX, -1 , GV_IDX, RV_IDX,
RV_IDX, GV_IDX, -1 , RV_IDX, RV_IDX, GV_IDX, -1 , RV_IDX,
BV_IDX, -1 , GV_IDX, BV_IDX, BV_IDX, -1 , GV_IDX, BV_IDX,
RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX,
BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX, BY_IDX, RY_IDX,
GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 ,
-1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX, -1 , GY_IDX,
RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX,
BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX, BU_IDX, RU_IDX,
GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 ,
-1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX, -1 , GU_IDX,
RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX,
BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX, BV_IDX, RV_IDX,
GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 ,
-1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, -1 , GV_IDX, //23
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //24
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //25
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //26
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //27
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //28
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //29
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //30
-1 , -1 , -1 , -1 , -1 , -1 , -1 , -1 , //31
BY_IDX, GY_IDX, RY_IDX, -1 , -1 , -1 , -1 , -1 , //32
BU_IDX, GU_IDX, RU_IDX, -1 , -1 , -1 , -1 , -1 , //33
BV_IDX, GV_IDX, RV_IDX, -1 , -1 , -1 , -1 , -1 , //34
};
dstRange = 0; //FIXME range = 1 is handled elsewhere
if (!dstRange) {
cy = cy * 255 / 219;
} else {
vr = vr * 224 / 255;
ub = ub * 224 / 255;
ug = ug * 224 / 255;
vg = vg * 224 / 255;
}
W = ROUNDED_DIV(ONE*ONE*ug, ub);
V = ROUNDED_DIV(ONE*ONE*vg, vr);
Z = ONE*ONE-W-V;
Cy = ROUNDED_DIV(cy*Z, ONE);
Cu = ROUNDED_DIV(ub*Z, ONE);
Cv = ROUNDED_DIV(vr*Z, ONE);
c->input_rgb2yuv_table[RY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cy);
c->input_rgb2yuv_table[GY_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cy);
c->input_rgb2yuv_table[BY_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cy);
c->input_rgb2yuv_table[RU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*V , Cu);
c->input_rgb2yuv_table[GU_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cu);
c->input_rgb2yuv_table[BU_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(Z+W) , Cu);
c->input_rgb2yuv_table[RV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*(V+Z) , Cv);
c->input_rgb2yuv_table[GV_IDX] = -ROUNDED_DIV((1 << RGB2YUV_SHIFT)*ONE*ONE , Cv);
c->input_rgb2yuv_table[BV_IDX] = ROUNDED_DIV((1 << RGB2YUV_SHIFT)*W , Cv);
if(/*!dstRange && */!memcmp(table, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], sizeof(ff_yuv2rgb_coeffs[SWS_CS_DEFAULT]))) {
c->input_rgb2yuv_table[BY_IDX] = ((int)(0.114 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[BV_IDX] = (-(int)(0.081 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[BU_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[GY_IDX] = ((int)(0.587 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[GV_IDX] = (-(int)(0.419 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[GU_IDX] = (-(int)(0.331 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[RY_IDX] = ((int)(0.299 * 219 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[RV_IDX] = ((int)(0.500 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
c->input_rgb2yuv_table[RU_IDX] = (-(int)(0.169 * 224 / 255 * (1 << RGB2YUV_SHIFT) + 0.5));
}
for(i=0; i<FF_ARRAY_ELEMS(map); i++)
AV_WL16(p + 16*4 + 2*i, map[i] >= 0 ? c->input_rgb2yuv_table[map[i]] : 0);
}
static void fill_xyztables(struct SwsContext *c)
{
int i;
double xyzgamma = XYZ_GAMMA;
double rgbgamma = 1.0 / RGB_GAMMA;
double xyzgammainv = 1.0 / XYZ_GAMMA;
double rgbgammainv = RGB_GAMMA;
static const int16_t xyz2rgb_matrix[3][4] = {
{13270, -6295, -2041},
{-3969, 7682, 170},
{ 228, -835, 4329} };
static const int16_t rgb2xyz_matrix[3][4] = {
{1689, 1464, 739},
{ 871, 2929, 296},
{ 79, 488, 3891} };
static int16_t xyzgamma_tab[4096], rgbgamma_tab[4096], xyzgammainv_tab[4096], rgbgammainv_tab[4096];
memcpy(c->xyz2rgb_matrix, xyz2rgb_matrix, sizeof(c->xyz2rgb_matrix));
memcpy(c->rgb2xyz_matrix, rgb2xyz_matrix, sizeof(c->rgb2xyz_matrix));
c->xyzgamma = xyzgamma_tab;
c->rgbgamma = rgbgamma_tab;
c->xyzgammainv = xyzgammainv_tab;
c->rgbgammainv = rgbgammainv_tab;
if (rgbgamma_tab[4095])
return;
/* set gamma vectors */
for (i = 0; i < 4096; i++) {
xyzgamma_tab[i] = lrint(pow(i / 4095.0, xyzgamma) * 4095.0);
rgbgamma_tab[i] = lrint(pow(i / 4095.0, rgbgamma) * 4095.0);
xyzgammainv_tab[i] = lrint(pow(i / 4095.0, xyzgammainv) * 4095.0);
rgbgammainv_tab[i] = lrint(pow(i / 4095.0, rgbgammainv) * 4095.0);
}
}
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)
{
const AVPixFmtDescriptor *desc_dst;
const AVPixFmtDescriptor *desc_src;
int need_reinit = 0;
memmove(c->srcColorspaceTable, inv_table, sizeof(int) * 4);
memmove(c->dstColorspaceTable, table, sizeof(int) * 4);
handle_formats(c);
desc_dst = av_pix_fmt_desc_get(c->dstFormat);
desc_src = av_pix_fmt_desc_get(c->srcFormat);
if(!isYUV(c->dstFormat) && !isGray(c->dstFormat))
dstRange = 0;
if(!isYUV(c->srcFormat) && !isGray(c->srcFormat))
srcRange = 0;
c->brightness = brightness;
c->contrast = contrast;
c->saturation = saturation;
if (c->srcRange != srcRange || c->dstRange != dstRange)
need_reinit = 1;
c->srcRange = srcRange;
c->dstRange = dstRange;
//The srcBpc check is possibly wrong but we seem to lack a definitive reference to test this
//and what we have in ticket 2939 looks better with this check
if (need_reinit && (c->srcBpc == 8 || !isYUV(c->srcFormat)))
ff_sws_init_range_convert(c);
if ((isYUV(c->dstFormat) || isGray(c->dstFormat)) && (isYUV(c->srcFormat) || isGray(c->srcFormat)))
return -1;
c->dstFormatBpp = av_get_bits_per_pixel(desc_dst);
c->srcFormatBpp = av_get_bits_per_pixel(desc_src);
if (!isYUV(c->dstFormat) && !isGray(c->dstFormat)) {
ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness,
contrast, saturation);
// FIXME factorize
if (ARCH_PPC)
ff_yuv2rgb_init_tables_ppc(c, inv_table, brightness,
contrast, saturation);
}
fill_rgb2yuv_table(c, table, dstRange);
return 0;
}
int sws_getColorspaceDetails(struct SwsContext *c, int **inv_table,
int *srcRange, int **table, int *dstRange,
int *brightness, int *contrast, int *saturation)
{
if (!c )
return -1;
*inv_table = c->srcColorspaceTable;
*table = c->dstColorspaceTable;
*srcRange = c->srcRange;
*dstRange = c->dstRange;
*brightness = c->brightness;
*contrast = c->contrast;
*saturation = c->saturation;
return 0;
}
static int handle_jpeg(enum AVPixelFormat *format)
{
switch (*format) {
case AV_PIX_FMT_YUVJ420P:
*format = AV_PIX_FMT_YUV420P;
return 1;
case AV_PIX_FMT_YUVJ411P:
*format = AV_PIX_FMT_YUV411P;
return 1;
case AV_PIX_FMT_YUVJ422P:
*format = AV_PIX_FMT_YUV422P;
return 1;
case AV_PIX_FMT_YUVJ444P:
*format = AV_PIX_FMT_YUV444P;
return 1;
case AV_PIX_FMT_YUVJ440P:
*format = AV_PIX_FMT_YUV440P;
return 1;
case AV_PIX_FMT_GRAY8:
case AV_PIX_FMT_GRAY16LE:
case AV_PIX_FMT_GRAY16BE:
return 1;
default:
return 0;
}
}
static int handle_0alpha(enum AVPixelFormat *format)
{
switch (*format) {
case AV_PIX_FMT_0BGR : *format = AV_PIX_FMT_ABGR ; return 1;
case AV_PIX_FMT_BGR0 : *format = AV_PIX_FMT_BGRA ; return 4;
case AV_PIX_FMT_0RGB : *format = AV_PIX_FMT_ARGB ; return 1;
case AV_PIX_FMT_RGB0 : *format = AV_PIX_FMT_RGBA ; return 4;
default: return 0;
}
}
static int handle_xyz(enum AVPixelFormat *format)
{
switch (*format) {
case AV_PIX_FMT_XYZ12BE : *format = AV_PIX_FMT_RGB48BE; return 1;
case AV_PIX_FMT_XYZ12LE : *format = AV_PIX_FMT_RGB48LE; return 1;
default: return 0;
}
}
static void handle_formats(SwsContext *c)
{
c->src0Alpha |= handle_0alpha(&c->srcFormat);
c->dst0Alpha |= handle_0alpha(&c->dstFormat);
c->srcXYZ |= handle_xyz(&c->srcFormat);
c->dstXYZ |= handle_xyz(&c->dstFormat);
if (c->srcXYZ || c->dstXYZ)
fill_xyztables(c);
}
SwsContext *sws_alloc_context(void)
{
SwsContext *c = av_mallocz(sizeof(SwsContext));
av_assert0(offsetof(SwsContext, redDither) + DITHER32_INT == offsetof(SwsContext, dither32));
if (c) {
c->av_class = &sws_context_class;
av_opt_set_defaults(c);
}
return c;
}
av_cold int sws_init_context(SwsContext *c, SwsFilter *srcFilter,
SwsFilter *dstFilter)
{
int i, j;
int usesVFilter, usesHFilter;
int unscaled;
SwsFilter dummyFilter = { NULL, NULL, NULL, NULL };
int srcW = c->srcW;
int srcH = c->srcH;
int dstW = c->dstW;
int dstH = c->dstH;
int dst_stride = FFALIGN(dstW * sizeof(int16_t) + 66, 16);
int flags, cpu_flags;
enum AVPixelFormat srcFormat = c->srcFormat;
enum AVPixelFormat dstFormat = c->dstFormat;
const AVPixFmtDescriptor *desc_src;
const AVPixFmtDescriptor *desc_dst;
int ret = 0;
cpu_flags = av_get_cpu_flags();
flags = c->flags;
emms_c();
if (!rgb15to16)
sws_rgb2rgb_init();
unscaled = (srcW == dstW && srcH == dstH);
c->srcRange |= handle_jpeg(&c->srcFormat);
c->dstRange |= handle_jpeg(&c->dstFormat);
if(srcFormat!=c->srcFormat || dstFormat!=c->dstFormat)
av_log(c, AV_LOG_WARNING, "deprecated pixel format used, make sure you did set range correctly\n");
if (!c->contrast && !c->saturation && !c->dstFormatBpp)
sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], c->srcRange,
ff_yuv2rgb_coeffs[SWS_CS_DEFAULT],
c->dstRange, 0, 1 << 16, 1 << 16);
handle_formats(c);
srcFormat = c->srcFormat;
dstFormat = c->dstFormat;
desc_src = av_pix_fmt_desc_get(srcFormat);
desc_dst = av_pix_fmt_desc_get(dstFormat);
if (!(unscaled && sws_isSupportedEndiannessConversion(srcFormat) &&
av_pix_fmt_swap_endianness(srcFormat) == dstFormat)) {
if (!sws_isSupportedInput(srcFormat)) {
av_log(c, AV_LOG_ERROR, "%s is not supported as input pixel format\n",
av_get_pix_fmt_name(srcFormat));
return AVERROR(EINVAL);
}
if (!sws_isSupportedOutput(dstFormat)) {
av_log(c, AV_LOG_ERROR, "%s is not supported as output pixel format\n",
av_get_pix_fmt_name(dstFormat));
return AVERROR(EINVAL);
}