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-rw-r--r--libswscale/utils.c1589
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diff --git a/libswscale/utils.c b/libswscale/utils.c
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--- /dev/null
+++ b/libswscale/utils.c
@@ -0,0 +1,1589 @@
+/*
+ * 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 General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU 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
+ *
+ * the C code (not assembly, mmx, ...) of this file can be used
+ * under the LGPL license too
+ */
+
+#define _SVID_SOURCE //needed for MAP_ANONYMOUS
+#include <inttypes.h>
+#include <string.h>
+#include <math.h>
+#include <stdio.h>
+#include "config.h"
+#include <assert.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 "swscale.h"
+#include "swscale_internal.h"
+#include "rgb2rgb.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/x86_cpu.h"
+#include "libavutil/avutil.h"
+#include "libavutil/bswap.h"
+#include "libavutil/pixdesc.h"
+
+unsigned swscale_version(void)
+{
+ 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;
+}
+
+#define RET 0xC3 //near return opcode for x86
+
+#ifdef M_PI
+#define PI M_PI
+#else
+#define PI 3.14159265358979323846
+#endif
+
+#define isSupportedIn(x) ( \
+ (x)==PIX_FMT_YUV420P \
+ || (x)==PIX_FMT_YUVA420P \
+ || (x)==PIX_FMT_YUYV422 \
+ || (x)==PIX_FMT_UYVY422 \
+ || (x)==PIX_FMT_RGB48BE \
+ || (x)==PIX_FMT_RGB48LE \
+ || (x)==PIX_FMT_RGB32 \
+ || (x)==PIX_FMT_RGB32_1 \
+ || (x)==PIX_FMT_BGR24 \
+ || (x)==PIX_FMT_BGR565 \
+ || (x)==PIX_FMT_BGR555 \
+ || (x)==PIX_FMT_BGR32 \
+ || (x)==PIX_FMT_BGR32_1 \
+ || (x)==PIX_FMT_RGB24 \
+ || (x)==PIX_FMT_RGB565 \
+ || (x)==PIX_FMT_RGB555 \
+ || (x)==PIX_FMT_GRAY8 \
+ || (x)==PIX_FMT_YUV410P \
+ || (x)==PIX_FMT_YUV440P \
+ || (x)==PIX_FMT_NV12 \
+ || (x)==PIX_FMT_NV21 \
+ || (x)==PIX_FMT_GRAY16BE \
+ || (x)==PIX_FMT_GRAY16LE \
+ || (x)==PIX_FMT_YUV444P \
+ || (x)==PIX_FMT_YUV422P \
+ || (x)==PIX_FMT_YUV411P \
+ || (x)==PIX_FMT_PAL8 \
+ || (x)==PIX_FMT_BGR8 \
+ || (x)==PIX_FMT_RGB8 \
+ || (x)==PIX_FMT_BGR4_BYTE \
+ || (x)==PIX_FMT_RGB4_BYTE \
+ || (x)==PIX_FMT_YUV440P \
+ || (x)==PIX_FMT_MONOWHITE \
+ || (x)==PIX_FMT_MONOBLACK \
+ || (x)==PIX_FMT_YUV420P16LE \
+ || (x)==PIX_FMT_YUV422P16LE \
+ || (x)==PIX_FMT_YUV444P16LE \
+ || (x)==PIX_FMT_YUV420P16BE \
+ || (x)==PIX_FMT_YUV422P16BE \
+ || (x)==PIX_FMT_YUV444P16BE \
+ )
+
+int sws_isSupportedInput(enum PixelFormat pix_fmt)
+{
+ return isSupportedIn(pix_fmt);
+}
+
+#define isSupportedOut(x) ( \
+ (x)==PIX_FMT_YUV420P \
+ || (x)==PIX_FMT_YUVA420P \
+ || (x)==PIX_FMT_YUYV422 \
+ || (x)==PIX_FMT_UYVY422 \
+ || (x)==PIX_FMT_YUV444P \
+ || (x)==PIX_FMT_YUV422P \
+ || (x)==PIX_FMT_YUV411P \
+ || isRGB(x) \
+ || isBGR(x) \
+ || (x)==PIX_FMT_NV12 \
+ || (x)==PIX_FMT_NV21 \
+ || (x)==PIX_FMT_GRAY16BE \
+ || (x)==PIX_FMT_GRAY16LE \
+ || (x)==PIX_FMT_GRAY8 \
+ || (x)==PIX_FMT_YUV410P \
+ || (x)==PIX_FMT_YUV440P \
+ || (x)==PIX_FMT_YUV420P16LE \
+ || (x)==PIX_FMT_YUV422P16LE \
+ || (x)==PIX_FMT_YUV444P16LE \
+ || (x)==PIX_FMT_YUV420P16BE \
+ || (x)==PIX_FMT_YUV422P16BE \
+ || (x)==PIX_FMT_YUV444P16BE \
+ )
+
+int sws_isSupportedOutput(enum PixelFormat pix_fmt)
+{
+ return isSupportedOut(pix_fmt);
+}
+
+#define usePal(x) (av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL)
+
+extern const int32_t ff_yuv2rgb_coeffs[8][4];
+
+const char *sws_format_name(enum PixelFormat format)
+{
+ if ((unsigned)format < PIX_FMT_NB && av_pix_fmt_descriptors[format].name)
+ return av_pix_fmt_descriptors[format].name;
+ else
+ return "Unknown format";
+}
+
+static double getSplineCoeff(double a, double b, double c, double d, double dist)
+{
+// printf("%f %f %f %f %f\n", a,b,c,d,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 int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,
+ int srcW, int dstW, int filterAlign, int one, int flags,
+ SwsVector *srcFilter, SwsVector *dstFilter, double param[2])
+{
+ int i;
+ int filterSize;
+ int filter2Size;
+ int minFilterSize;
+ int64_t *filter=NULL;
+ int64_t *filter2=NULL;
+ const int64_t fone= 1LL<<54;
+ int ret= -1;
+#if ARCH_X86
+ if (flags & SWS_CPU_CAPS_MMX)
+ __asm__ volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions)
+#endif
+
+ // NOTE: the +1 is for the MMX scaler which reads over the end
+ FF_ALLOC_OR_GOTO(NULL, *filterPos, (dstW+1)*sizeof(int16_t), fail);
+
+ if (FFABS(xInc - 0x10000) <10) { // unscaled
+ int i;
+ filterSize= 1;
+ FF_ALLOCZ_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;
+ int xDstInSrc;
+ filterSize= 1;
+ FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
+
+ xDstInSrc= xInc/2 - 0x8000;
+ 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;
+ int xDstInSrc;
+ filterSize= 2;
+ FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
+
+ xDstInSrc= xInc/2 - 0x8000;
+ 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((xx<<16) - xDstInSrc)*(fone>>16);
+ if (coeff<0) coeff=0;
+ filter[i*filterSize + j]= coeff;
+ xx++;
+ }
+ xDstInSrc+= xInc;
+ }
+ } else {
+ int xDstInSrc;
+ int sizeFactor;
+
+ if (flags&SWS_BICUBIC) sizeFactor= 4;
+ else if (flags&SWS_X) sizeFactor= 8;
+ else if (flags&SWS_AREA) sizeFactor= 1; //downscale only, for upscale it is bilinear
+ else if (flags&SWS_GAUSS) sizeFactor= 8; // infinite ;)
+ else if (flags&SWS_LANCZOS) sizeFactor= param[0] != SWS_PARAM_DEFAULT ? ceil(2*param[0]) : 6;
+ else if (flags&SWS_SINC) sizeFactor= 20; // infinite ;)
+ else if (flags&SWS_SPLINE) sizeFactor= 20; // infinite ;)
+ else if (flags&SWS_BILINEAR) sizeFactor= 2;
+ else {
+ sizeFactor= 0; //GCC warning killer
+ assert(0);
+ }
+
+ if (xInc <= 1<<16) filterSize= 1 + sizeFactor; // upscale
+ else filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW;
+
+ if (filterSize > srcW-2) filterSize=srcW-2;
+
+ FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);
+
+ xDstInSrc= xInc - 0x10000;
+ for (i=0; i<dstW; i++) {
+ int xx= (xDstInSrc - ((filterSize-2)<<16)) / (1<<17);
+ int j;
+ (*filterPos)[i]= xx;
+ for (j=0; j<filterSize; j++) {
+ int64_t d= ((int64_t)FFABS((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);
+ 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 if (d < 1LL<<31)
+ coeff = (-B-6*C)*ddd + (6*B+30*C)*dd + (-12*B-48*C)*d + (8*B+24*C)*(1<<30);
+ else
+ coeff=0.0;
+ coeff *= fone>>(30+24);
+ }
+/* else if (flags & SWS_X) {
+ double p= param ? param*0.01 : 0.3;
+ coeff = d ? sin(d*PI)/(d*PI) : 1.0;
+ coeff*= pow(2.0, - p*d*d);
+ }*/
+ 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*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*PI)/(floatd*PI) : 1.0)*fone;
+ } else if (flags & SWS_LANCZOS) {
+ double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
+ coeff = (d ? sin(floatd*PI)*sin(floatd*PI/p)/(floatd*floatd*PI*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 {
+ coeff= 0.0; //GCC warning killer
+ assert(0);
+ }
+
+ filter[i*filterSize + j]= coeff;
+ xx++;
+ }
+ xDstInSrc+= 2*xInc;
+ }
+ }
+
+ /* apply src & dst Filter to filter -> filter2
+ av_free(filter);
+ */
+ assert(filterSize>0);
+ filter2Size= filterSize;
+ if (srcFilter) filter2Size+= srcFilter->length - 1;
+ if (dstFilter) filter2Size+= dstFilter->length - 1;
+ assert(filter2Size>0);
+ FF_ALLOCZ_OR_GOTO(NULL, filter2, filter2Size*dstW*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 (flags & SWS_CPU_CAPS_ALTIVEC) {
+ // we can handle the special case 4,
+ // so we don't want to go to 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 (flags & SWS_CPU_CAPS_MMX) {
+ // special case for unscaled vertical filtering
+ if (minFilterSize == 1 && filterAlign == 2)
+ filterAlign= 1;
+ }
+
+ assert(minFilterSize > 0);
+ filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));
+ assert(filterSize > 0);
+ filter= av_malloc(filterSize*dstW*sizeof(*filter));
+ if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter)
+ 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_OR_GOTO(NULL, *outFilter, *outFilterSize*(dstW+1)*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;
+ 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]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end
+ for (i=0; i<*outFilterSize; i++) {
+ int j= dstW*(*outFilterSize);
+ (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];
+ }
+
+ ret=0;
+fail:
+ av_free(filter);
+ av_free(filter2);
+ return ret;
+}
+
+#if ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL
+static int initMMX2HScaler(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits)
+{
+ uint8_t *fragmentA;
+ x86_reg imm8OfPShufW1A;
+ x86_reg imm8OfPShufW2A;
+ x86_reg fragmentLengthA;
+ uint8_t *fragmentB;
+ x86_reg imm8OfPShufW1B;
+ x86_reg imm8OfPShufW2B;
+ x86_reg fragmentLengthB;
+ int fragmentPos;
+
+ int xpos, i;
+
+ // create an optimized horizontal scaling routine
+ /* This scaler is made of runtime-generated MMX2 code using specially
+ * tuned pshufw instructions. For every four output pixels, if four
+ * input pixels are enough for the fast bilinear scaling, then a chunk
+ * of fragmentB is used. If five input pixels are needed, then a chunk
+ * of fragmentA is used.
+ */
+
+ //code fragment
+
+ __asm__ volatile(
+ "jmp 9f \n\t"
+ // Begin
+ "0: \n\t"
+ "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t"
+ "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t"
+ "movd 1(%%"REG_c", %%"REG_S"), %%mm1 \n\t"
+ "punpcklbw %%mm7, %%mm1 \n\t"
+ "punpcklbw %%mm7, %%mm0 \n\t"
+ "pshufw $0xFF, %%mm1, %%mm1 \n\t"
+ "1: \n\t"
+ "pshufw $0xFF, %%mm0, %%mm0 \n\t"
+ "2: \n\t"
+ "psubw %%mm1, %%mm0 \n\t"
+ "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t"
+ "pmullw %%mm3, %%mm0 \n\t"
+ "psllw $7, %%mm1 \n\t"
+ "paddw %%mm1, %%mm0 \n\t"
+
+ "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t"
+
+ "add $8, %%"REG_a" \n\t"
+ // End
+ "9: \n\t"
+// "int $3 \n\t"
+ "lea " LOCAL_MANGLE(0b) ", %0 \n\t"
+ "lea " LOCAL_MANGLE(1b) ", %1 \n\t"
+ "lea " LOCAL_MANGLE(2b) ", %2 \n\t"
+ "dec %1 \n\t"
+ "dec %2 \n\t"
+ "sub %0, %1 \n\t"
+ "sub %0, %2 \n\t"
+ "lea " LOCAL_MANGLE(9b) ", %3 \n\t"
+ "sub %0, %3 \n\t"
+
+
+ :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),
+ "=r" (fragmentLengthA)
+ );
+
+ __asm__ volatile(
+ "jmp 9f \n\t"
+ // Begin
+ "0: \n\t"
+ "movq (%%"REG_d", %%"REG_a"), %%mm3 \n\t"
+ "movd (%%"REG_c", %%"REG_S"), %%mm0 \n\t"
+ "punpcklbw %%mm7, %%mm0 \n\t"
+ "pshufw $0xFF, %%mm0, %%mm1 \n\t"
+ "1: \n\t"
+ "pshufw $0xFF, %%mm0, %%mm0 \n\t"
+ "2: \n\t"
+ "psubw %%mm1, %%mm0 \n\t"
+ "movl 8(%%"REG_b", %%"REG_a"), %%esi \n\t"
+ "pmullw %%mm3, %%mm0 \n\t"
+ "psllw $7, %%mm1 \n\t"
+ "paddw %%mm1, %%mm0 \n\t"
+
+ "movq %%mm0, (%%"REG_D", %%"REG_a") \n\t"
+
+ "add $8, %%"REG_a" \n\t"
+ // End
+ "9: \n\t"
+// "int $3 \n\t"
+ "lea " LOCAL_MANGLE(0b) ", %0 \n\t"
+ "lea " LOCAL_MANGLE(1b) ", %1 \n\t"
+ "lea " LOCAL_MANGLE(2b) ", %2 \n\t"
+ "dec %1 \n\t"
+ "dec %2 \n\t"
+ "sub %0, %1 \n\t"
+ "sub %0, %2 \n\t"
+ "lea " LOCAL_MANGLE(9b) ", %3 \n\t"
+ "sub %0, %3 \n\t"
+
+
+ :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),
+ "=r" (fragmentLengthB)
+ );
+
+ xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers
+ fragmentPos=0;
+
+ for (i=0; i<dstW/numSplits; i++) {
+ int xx=xpos>>16;
+
+ if ((i&3) == 0) {
+ int a=0;
+ int b=((xpos+xInc)>>16) - xx;
+ int c=((xpos+xInc*2)>>16) - xx;
+ int d=((xpos+xInc*3)>>16) - xx;
+ int inc = (d+1<4);
+ uint8_t *fragment = (d+1<4) ? fragmentB : fragmentA;
+ x86_reg imm8OfPShufW1 = (d+1<4) ? imm8OfPShufW1B : imm8OfPShufW1A;
+ x86_reg imm8OfPShufW2 = (d+1<4) ? imm8OfPShufW2B : imm8OfPShufW2A;
+ x86_reg fragmentLength = (d+1<4) ? fragmentLengthB : fragmentLengthA;
+ int maxShift= 3-(d+inc);
+ int shift=0;
+
+ if (filterCode) {
+ filter[i ] = (( xpos & 0xFFFF) ^ 0xFFFF)>>9;
+ filter[i+1] = (((xpos+xInc ) & 0xFFFF) ^ 0xFFFF)>>9;
+ filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;
+ filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;
+ filterPos[i/2]= xx;
+
+ memcpy(filterCode + fragmentPos, fragment, fragmentLength);
+
+ filterCode[fragmentPos + imm8OfPShufW1]=
+ (a+inc) | ((b+inc)<<2) | ((c+inc)<<4) | ((d+inc)<<6);
+ filterCode[fragmentPos + imm8OfPShufW2]=
+ a | (b<<2) | (c<<4) | (d<<6);
+
+ if (i+4-inc>=dstW) shift=maxShift; //avoid overread
+ else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align
+
+ if (shift && i>=shift) {
+ filterCode[fragmentPos + imm8OfPShufW1]+= 0x55*shift;
+ filterCode[fragmentPos + imm8OfPShufW2]+= 0x55*shift;
+ filterPos[i/2]-=shift;
+ }
+ }
+
+ fragmentPos+= fragmentLength;
+
+ if (filterCode)
+ filterCode[fragmentPos]= RET;
+ }
+ xpos+=xInc;
+ }
+ if (filterCode)
+ filterPos[((i/2)+1)&(~1)]= xpos>>16; // needed to jump to the next part
+
+ return fragmentPos + 1;
+}
+#endif /* ARCH_X86 && (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL */
+
+static void getSubSampleFactors(int *h, int *v, enum PixelFormat format)
+{
+ *h = av_pix_fmt_descriptors[format].log2_chroma_w;
+ *v = av_pix_fmt_descriptors[format].log2_chroma_h;
+}
+
+static uint16_t roundToInt16(int64_t f)
+{
+ int r= (f + (1<<15))>>16;
+ if (r<-0x7FFF) return 0x8000;
+ else if (r> 0x7FFF) return 0x7FFF;
+ else return r;
+}
+
+int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation)
+{
+ int64_t crv = inv_table[0];
+ int64_t cbu = inv_table[1];
+ int64_t cgu = -inv_table[2];
+ int64_t cgv = -inv_table[3];
+ int64_t cy = 1<<16;
+ int64_t oy = 0;
+
+ memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);
+ memcpy(c->dstColorspaceTable, table, sizeof(int)*4);
+
+ c->brightness= brightness;
+ c->contrast = contrast;
+ c->saturation= saturation;
+ c->srcRange = srcRange;
+ c->dstRange = dstRange;
+ if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
+
+ c->uOffset= 0x0400040004000400LL;
+ c->vOffset= 0x0400040004000400LL;
+
+ if (!srcRange) {
+ cy= (cy*255) / 219;
+ oy= 16<<16;
+ } else {
+ crv= (crv*224) / 255;
+ cbu= (cbu*224) / 255;
+ cgu= (cgu*224) / 255;
+ cgv= (cgv*224) / 255;
+ }
+
+ cy = (cy *contrast )>>16;
+ crv= (crv*contrast * saturation)>>32;
+ cbu= (cbu*contrast * saturation)>>32;
+ cgu= (cgu*contrast * saturation)>>32;
+ cgv= (cgv*contrast * saturation)>>32;
+
+ oy -= 256*brightness;
+
+ c->yCoeff= roundToInt16(cy *8192) * 0x0001000100010001ULL;
+ c->vrCoeff= roundToInt16(crv*8192) * 0x0001000100010001ULL;
+ c->ubCoeff= roundToInt16(cbu*8192) * 0x0001000100010001ULL;
+ c->vgCoeff= roundToInt16(cgv*8192) * 0x0001000100010001ULL;
+ c->ugCoeff= roundToInt16(cgu*8192) * 0x0001000100010001ULL;
+ c->yOffset= roundToInt16(oy * 8) * 0x0001000100010001ULL;
+
+ c->yuv2rgb_y_coeff = (int16_t)roundToInt16(cy <<13);
+ c->yuv2rgb_y_offset = (int16_t)roundToInt16(oy << 9);
+ c->yuv2rgb_v2r_coeff= (int16_t)roundToInt16(crv<<13);
+ c->yuv2rgb_v2g_coeff= (int16_t)roundToInt16(cgv<<13);
+ c->yuv2rgb_u2g_coeff= (int16_t)roundToInt16(cgu<<13);
+ c->yuv2rgb_u2b_coeff= (int16_t)roundToInt16(cbu<<13);
+
+ ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);
+ //FIXME factorize
+
+#if ARCH_PPC && (HAVE_ALTIVEC || CONFIG_RUNTIME_CPUDETECT)
+ if (c->flags & SWS_CPU_CAPS_ALTIVEC)
+ ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness, contrast, saturation);
+#endif
+ return 0;
+}
+
+int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)
+{
+ if (isYUV(c->dstFormat) || isGray(c->dstFormat)) 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 PixelFormat *format)
+{
+ switch (*format) {
+ case PIX_FMT_YUVJ420P:
+ *format = PIX_FMT_YUV420P;
+ return 1;
+ case PIX_FMT_YUVJ422P:
+ *format = PIX_FMT_YUV422P;
+ return 1;
+ case PIX_FMT_YUVJ444P:
+ *format = PIX_FMT_YUV444P;
+ return 1;
+ case PIX_FMT_YUVJ440P:
+ *format = PIX_FMT_YUV440P;
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat,
+ int dstW, int dstH, enum PixelFormat dstFormat, int flags,
+ SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)
+{
+
+ SwsContext *c;
+ int i;
+ int usesVFilter, usesHFilter;
+ int unscaled;
+ int srcRange, dstRange;
+ SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};
+#if ARCH_X86
+ if (flags & SWS_CPU_CAPS_MMX)
+ __asm__ volatile("emms\n\t"::: "memory");
+#endif
+
+#if !CONFIG_RUNTIME_CPUDETECT //ensure that the flags match the compiled variant if cpudetect is off
+ flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC|SWS_CPU_CAPS_BFIN);
+ flags |= ff_hardcodedcpuflags();
+#endif /* CONFIG_RUNTIME_CPUDETECT */
+ if (!rgb15to16) sws_rgb2rgb_init(flags);
+
+ unscaled = (srcW == dstW && srcH == dstH);
+
+ srcRange = handle_jpeg(&srcFormat);
+ dstRange = handle_jpeg(&dstFormat);
+
+ if (!isSupportedIn(srcFormat)) {
+ av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", sws_format_name(srcFormat));
+ return NULL;
+ }
+ if (!isSupportedOut(dstFormat)) {
+ av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output pixel format\n", sws_format_name(dstFormat));
+ return NULL;
+ }
+
+ i= flags & ( SWS_POINT
+ |SWS_AREA
+ |SWS_BILINEAR
+ |SWS_FAST_BILINEAR
+ |SWS_BICUBIC
+ |SWS_X
+ |SWS_GAUSS
+ |SWS_LANCZOS
+ |SWS_SINC
+ |SWS_SPLINE
+ |SWS_BICUBLIN);
+ if(!i || (i & (i-1))) {
+ av_log(NULL, AV_LOG_ERROR, "swScaler: Exactly one scaler algorithm must be chosen\n");
+ return NULL;
+ }
+
+ /* sanity check */
+ 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
+ av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",
+ srcW, srcH, dstW, dstH);
+ return NULL;
+ }
+ if(srcW > VOFW || dstW > VOFW) {
+ av_log(NULL, AV_LOG_ERROR, "swScaler: Compile-time maximum width is "AV_STRINGIFY(VOFW)" change VOF/VOFW and recompile\n");
+ return NULL;
+ }
+
+ if (!dstFilter) dstFilter= &dummyFilter;
+ if (!srcFilter) srcFilter= &dummyFilter;
+
+ FF_ALLOCZ_OR_GOTO(NULL, c, sizeof(SwsContext), fail);
+
+ c->av_class = &sws_context_class;
+ c->srcW= srcW;
+ c->srcH= srcH;
+ c->dstW= dstW;
+ c->dstH= dstH;
+ c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;
+ c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;
+ c->flags= flags;
+ c->dstFormat= dstFormat;
+ c->srcFormat= srcFormat;
+ c->vRounder= 4* 0x0001000100010001ULL;
+
+ usesHFilter= usesVFilter= 0;
+ if (dstFilter->lumV && dstFilter->lumV->length>1) usesVFilter=1;
+ if (dstFilter->lumH && dstFilter->lumH->length>1) usesHFilter=1;
+ if (dstFilter->chrV && dstFilter->chrV->length>1) usesVFilter=1;
+ if (dstFilter->chrH && dstFilter->chrH->length>1) usesHFilter=1;
+ if (srcFilter->lumV && srcFilter->lumV->length>1) usesVFilter=1;
+ if (srcFilter->lumH && srcFilter->lumH->length>1) usesHFilter=1;
+ if (srcFilter->chrV && srcFilter->chrV->length>1) usesVFilter=1;
+ if (srcFilter->chrH && srcFilter->chrH->length>1) usesHFilter=1;
+
+ getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);
+ getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);
+
+ // reuse chroma for 2 pixels RGB/BGR unless user wants full chroma interpolation
+ if ((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;
+
+ // drop some chroma lines if the user wants it
+ c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;
+ c->chrSrcVSubSample+= c->vChrDrop;
+
+ // drop every other pixel for chroma calculation unless user wants full chroma
+ if ((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP)
+ && srcFormat!=PIX_FMT_RGB8 && srcFormat!=PIX_FMT_BGR8
+ && srcFormat!=PIX_FMT_RGB4 && srcFormat!=PIX_FMT_BGR4
+ && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE
+ && ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&(SWS_FAST_BILINEAR|SWS_POINT))))
+ c->chrSrcHSubSample=1;
+
+ if (param) {
+ c->param[0] = param[0];
+ c->param[1] = param[1];
+ } else {
+ c->param[0] =
+ c->param[1] = SWS_PARAM_DEFAULT;
+ }
+
+ // Note the -((-x)>>y) is so that we always round toward +inf.
+ c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);
+ c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);
+ c->chrDstW= -((-dstW) >> c->chrDstHSubSample);
+ c->chrDstH= -((-dstH) >> c->chrDstVSubSample);
+
+ sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], srcRange, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT] /* FIXME*/, dstRange, 0, 1<<16, 1<<16);
+
+ /* unscaled special cases */
+ if (unscaled && !usesHFilter && !usesVFilter && (srcRange == dstRange || isBGR(dstFormat) || isRGB(dstFormat))) {
+ ff_get_unscaled_swscale(c);
+
+ if (c->swScale) {
+ if (flags&SWS_PRINT_INFO)
+ av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",
+ sws_format_name(srcFormat), sws_format_name(dstFormat));
+ return c;
+ }
+ }
+
+ if (flags & SWS_CPU_CAPS_MMX2) {
+ c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;
+ if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR)) {
+ if (flags&SWS_PRINT_INFO)
+ av_log(c, AV_LOG_INFO, "output width is not a multiple of 32 -> no MMX2 scaler\n");
+ }
+ if (usesHFilter) c->canMMX2BeUsed=0;
+ }
+ else
+ c->canMMX2BeUsed=0;
+
+ c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;
+ c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;
+
+ // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst
+ // but only for the FAST_BILINEAR mode otherwise do correct scaling
+ // n-2 is the last chrominance sample available
+ // this is not perfect, but no one should notice the difference, the more correct variant
+ // would be like the vertical one, but that would require some special code for the
+ // first and last pixel
+ if (flags&SWS_FAST_BILINEAR) {
+ if (c->canMMX2BeUsed) {
+ c->lumXInc+= 20;
+ c->chrXInc+= 20;
+ }