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swscale: K&R formatting cosmetics (part II)

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Also adjust some comments including wording and typo fixes.
pull/5/head
Diego Biurrun 13 years ago
parent 90a4306007
commit ef0ee7f657
3 changed files with 1128 additions and 920 deletions
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  1. 211
      libswscale/swscale.c
  2. 591
      libswscale/utils.c

211
libswscale/swscale.c
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@ -18,21 +18,22 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <assert.h>
#include <inttypes.h>
#include <string.h>
#include <math.h>
#include <stdio.h>
#include "config.h"
#include <assert.h>
#include "swscale.h"
#include "swscale_internal.h"
#include "rgb2rgb.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/cpu.h"
#include <string.h>
#include "libavutil/avutil.h"
#include "libavutil/mathematics.h"
#include "libavutil/bswap.h"
#include "libavutil/cpu.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/pixdesc.h"
#include "config.h"
#include "rgb2rgb.h"
#include "swscale_internal.h"
#include "swscale.h"
DECLARE_ALIGNED(8, const uint8_t, dither_8x8_128)[8][8] = {
{ 36, 68, 60, 92, 34, 66, 58, 90, },
@ -44,12 +45,13 @@ DECLARE_ALIGNED(8, const uint8_t, dither_8x8_128)[8][8] = {
{ 48, 80, 40, 72, 54, 86, 46, 78, },
{ 112, 16, 104, 8, 118, 22, 110, 14, },
};
DECLARE_ALIGNED(8, const uint8_t, ff_sws_pb_64)[8] =
{ 64, 64, 64, 64, 64, 64, 64, 64 };
static av_always_inline void fillPlane(uint8_t* plane, int stride,
int width, int height,
int y, uint8_t val)
DECLARE_ALIGNED(8, const uint8_t, ff_sws_pb_64)[8] = {
64, 64, 64, 64, 64, 64, 64, 64
};
static av_always_inline void fillPlane(uint8_t *plane, int stride, int width,
int height, int y, uint8_t val)
{
int i;
uint8_t *ptr = plane + stride * y;
@ -59,8 +61,8 @@ static av_always_inline void fillPlane(uint8_t* plane, int stride,
}
}
static void hScale16To19_c(SwsContext *c, int16_t *_dst, int dstW, const uint8_t *_src,
const int16_t *filter,
static void hScale16To19_c(SwsContext *c, int16_t *_dst, int dstW,
const uint8_t *_src, const int16_t *filter,
const int32_t *filterPos, int filterSize)
{
int i;
@ -82,8 +84,8 @@ static void hScale16To19_c(SwsContext *c, int16_t *_dst, int dstW, const uint8_t
}
}
static void hScale16To15_c(SwsContext *c, int16_t *dst, int dstW, const uint8_t *_src,
const int16_t *filter,
static void hScale16To15_c(SwsContext *c, int16_t *dst, int dstW,
const uint8_t *_src, const int16_t *filter,
const int32_t *filterPos, int filterSize)
{
int i;
@ -104,9 +106,9 @@ static void hScale16To15_c(SwsContext *c, int16_t *dst, int dstW, const uint8_t
}
// bilinear / bicubic scaling
static void hScale8To15_c(SwsContext *c, int16_t *dst, int dstW, const uint8_t *src,
const int16_t *filter, const int32_t *filterPos,
int filterSize)
static void hScale8To15_c(SwsContext *c, int16_t *dst, int dstW,
const uint8_t *src, const int16_t *filter,
const int32_t *filterPos, int filterSize)
{
int i;
for (i = 0; i < dstW; i++) {
@ -116,15 +118,13 @@ static void hScale8To15_c(SwsContext *c, int16_t *dst, int dstW, const uint8_t *
for (j = 0; j < filterSize; j++) {
val += ((int)src[srcPos + j]) * filter[filterSize * i + j];
}
//filter += hFilterSize;
dst[i] = FFMIN(val >> 7, (1 << 15) - 1); // the cubic equation does overflow ...
//dst[i] = val>>7;
}
}
static void hScale8To19_c(SwsContext *c, int16_t *_dst, int dstW, const uint8_t *src,
const int16_t *filter, const int32_t *filterPos,
int filterSize)
static void hScale8To19_c(SwsContext *c, int16_t *_dst, int dstW,
const uint8_t *src, const int16_t *filter,
const int32_t *filterPos, int filterSize)
{
int i;
int32_t *dst = (int32_t *) _dst;
@ -135,9 +135,7 @@ static void hScale8To19_c(SwsContext *c, int16_t *_dst, int dstW, const uint8_t
for (j = 0; j < filterSize; j++) {
val += ((int)src[srcPos + j]) * filter[filterSize * i + j];
}
//filter += hFilterSize;
dst[i] = FFMIN(val >> 3, (1 << 19) - 1); // the cubic equation does overflow ...
//dst[i] = val>>7;
}
}
@ -151,6 +149,7 @@ static void chrRangeToJpeg_c(int16_t *dstU, int16_t *dstV, int width)
dstV[i] = (FFMIN(dstV[i], 30775) * 4663 - 9289992) >> 12; // -264
}
}
static void chrRangeFromJpeg_c(int16_t *dstU, int16_t *dstV, int width)
{
int i;
@ -159,12 +158,14 @@ static void chrRangeFromJpeg_c(int16_t *dstU, int16_t *dstV, int width)
dstV[i] = (dstV[i] * 1799 + 4081085) >> 11; // 1469
}
}
static void lumRangeToJpeg_c(int16_t *dst, int width)
{
int i;
for (i = 0; i < width; i++)
dst[i] = (FFMIN(dst[i], 30189) * 19077 - 39057361) >> 14;
}
static void lumRangeFromJpeg_c(int16_t *dst, int width)
{
int i;
@ -182,6 +183,7 @@ static void chrRangeToJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width)
dstV[i] = (FFMIN(dstV[i], 30775 << 4) * 4663 - (9289992 << 4)) >> 12; // -264
}
}
static void chrRangeFromJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width)
{
int i;
@ -192,6 +194,7 @@ static void chrRangeFromJpeg16_c(int16_t *_dstU, int16_t *_dstV, int width)
dstV[i] = (dstV[i] * 1799 + (4081085 << 4)) >> 11; // 1469
}
}
static void lumRangeToJpeg16_c(int16_t *_dst, int width)
{
int i;
@ -199,6 +202,7 @@ static void lumRangeToJpeg16_c(int16_t *_dst, int width)
for (i = 0; i < width; i++)
dst[i] = (FFMIN(dst[i], 30189 << 4) * 4769 - (39057361 << 2)) >> 12;
}
static void lumRangeFromJpeg16_c(int16_t *_dst, int width)
{
int i;
@ -222,13 +226,16 @@ static void hyscale_fast_c(SwsContext *c, int16_t *dst, int dstWidth,
// *** horizontal scale Y line to temp buffer
static av_always_inline void hyscale(SwsContext *c, int16_t *dst, int dstWidth,
const uint8_t *src_in[4], int srcW, int xInc,
const uint8_t *src_in[4],
int srcW, int xInc,
const int16_t *hLumFilter,
const int32_t *hLumFilterPos, int hLumFilterSize,
const int32_t *hLumFilterPos,
int hLumFilterSize,
uint8_t *formatConvBuffer,
uint32_t *pal, int isAlpha)
{
void (*toYV12)(uint8_t *, const uint8_t *, int, uint32_t *) = isAlpha ? c->alpToYV12 : c->lumToYV12;
void (*toYV12)(uint8_t *, const uint8_t *, int, uint32_t *) =
isAlpha ? c->alpToYV12 : c->lumToYV12;
void (*convertRange)(int16_t *, int) = isAlpha ? NULL : c->lumConvertRange;
const uint8_t *src = src_in[isAlpha ? 3 : 0];
@ -241,7 +248,8 @@ static av_always_inline void hyscale(SwsContext *c, int16_t *dst, int dstWidth,
}
if (!c->hyscale_fast) {
c->hyScale(c, dst, dstWidth, src, hLumFilter, hLumFilterPos, hLumFilterSize);
c->hyScale(c, dst, dstWidth, src, hLumFilter,
hLumFilterPos, hLumFilterSize);
} else { // fast bilinear upscale / crap downscale
c->hyscale_fast(c, dst, dstWidth, src, srcW, xInc);
}
@ -265,20 +273,25 @@ static void hcscale_fast_c(SwsContext *c, int16_t *dst1, int16_t *dst2,
}
}
static av_always_inline void hcscale(SwsContext *c, int16_t *dst1, int16_t *dst2, int dstWidth,
static av_always_inline void hcscale(SwsContext *c, int16_t *dst1,
int16_t *dst2, int dstWidth,
const uint8_t *src_in[4],
int srcW, int xInc, const int16_t *hChrFilter,
const int32_t *hChrFilterPos, int hChrFilterSize,
int srcW, int xInc,
const int16_t *hChrFilter,
const int32_t *hChrFilterPos,
int hChrFilterSize,
uint8_t *formatConvBuffer, uint32_t *pal)
{
const uint8_t *src1 = src_in[1], *src2 = src_in[2];
if (c->chrToYV12) {
uint8_t *buf2 = formatConvBuffer + FFALIGN(srcW * FFALIGN(c->srcBpc, 8) >> 3, 16);
uint8_t *buf2 = formatConvBuffer +
FFALIGN(srcW * FFALIGN(c->srcBpc, 8) >> 3, 16);
c->chrToYV12(formatConvBuffer, buf2, src1, src2, srcW, pal);
src1 = formatConvBuffer;
src2 = buf2;
} else if (c->readChrPlanar) {
uint8_t *buf2 = formatConvBuffer + FFALIGN(srcW * FFALIGN(c->srcBpc, 8) >> 3, 16);
uint8_t *buf2 = formatConvBuffer +
FFALIGN(srcW * FFALIGN(c->srcBpc, 8) >> 3, 16);
c->readChrPlanar(formatConvBuffer, buf2, src_in, srcW);
src1 = formatConvBuffer;
src2 = buf2;
@ -296,13 +309,16 @@ static av_always_inline void hcscale(SwsContext *c, int16_t *dst1, int16_t *dst2
}
#define DEBUG_SWSCALE_BUFFERS 0
#define DEBUG_BUFFERS(...) if (DEBUG_SWSCALE_BUFFERS) av_log(c, AV_LOG_DEBUG, __VA_ARGS__)
#define DEBUG_BUFFERS(...) \
if (DEBUG_SWSCALE_BUFFERS) \
av_log(c, AV_LOG_DEBUG, __VA_ARGS__)
static int swScale(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY,
int srcSliceH, uint8_t *dst[], int dstStride[])
{
/* load a few things into local vars to make the code more readable? and faster */
/* load a few things into local vars to make the code more readable?
* and faster */
const int srcW = c->srcW;
const int dstW = c->dstW;
const int dstH = c->dstH;
@ -333,9 +349,6 @@ static int swScale(SwsContext *c, const uint8_t* src[],
const int vLumBufSize = c->vLumBufSize;
const int vChrBufSize = c->vChrBufSize;
uint8_t *formatConvBuffer = c->formatConvBuffer;
const int chrSrcSliceY= srcSliceY >> c->chrSrcVSubSample;
const int chrSrcSliceH= -((-srcSliceH) >> c->chrSrcVSubSample);
int lastDstY;
uint32_t *pal = c->pal_yuv;
yuv2planar1_fn yuv2plane1 = c->yuv2plane1;
yuv2planarX_fn yuv2planeX = c->yuv2planeX;
@ -343,7 +356,11 @@ static int swScale(SwsContext *c, const uint8_t* src[],
yuv2packed1_fn yuv2packed1 = c->yuv2packed1;
yuv2packed2_fn yuv2packed2 = c->yuv2packed2;
yuv2packedX_fn yuv2packedX = c->yuv2packedX;
int should_dither = is9_OR_10BPS(c->srcFormat) || is16BPS(c->srcFormat);
const int chrSrcSliceY = srcSliceY >> c->chrSrcVSubSample;
const int chrSrcSliceH = -((-srcSliceH) >> c->chrSrcVSubSample);
int should_dither = is9_OR_10BPS(c->srcFormat) ||
is16BPS(c->srcFormat);
int lastDstY;
/* vars which will change and which we need to store back in the context */
int dstY = c->dstY;
@ -366,25 +383,29 @@ static int swScale(SwsContext *c, const uint8_t* src[],
srcStride[2] <<= c->vChrDrop;
DEBUG_BUFFERS("swScale() %p[%d] %p[%d] %p[%d] %p[%d] -> %p[%d] %p[%d] %p[%d] %p[%d]\n",
src[0], srcStride[0], src[1], srcStride[1], src[2], srcStride[2], src[3], srcStride[3],
dst[0], dstStride[0], dst[1], dstStride[1], dst[2], dstStride[2], dst[3], dstStride[3]);
src[0], srcStride[0], src[1], srcStride[1],
src[2], srcStride[2], src[3], srcStride[3],
dst[0], dstStride[0], dst[1], dstStride[1],
dst[2], dstStride[2], dst[3], dstStride[3]);
DEBUG_BUFFERS("srcSliceY: %d srcSliceH: %d dstY: %d dstH: %d\n",
srcSliceY, srcSliceH, dstY, dstH);
DEBUG_BUFFERS("vLumFilterSize: %d vLumBufSize: %d vChrFilterSize: %d vChrBufSize: %d\n",
vLumFilterSize, vLumBufSize, vChrFilterSize, vChrBufSize);
if (dstStride[0]%8 !=0 || dstStride[1]%8 !=0 || dstStride[2]%8 !=0 || dstStride[3]%8 != 0) {
static int warnedAlready=0; //FIXME move this into the context perhaps
if (dstStride[0] % 8 != 0 || dstStride[1] % 8 != 0 ||
dstStride[2] % 8 != 0 || dstStride[3] % 8 != 0) {
static int warnedAlready = 0; // FIXME maybe move this into the context
if (flags & SWS_PRINT_INFO && !warnedAlready) {
av_log(c, AV_LOG_WARNING, "Warning: dstStride is not aligned!\n"
av_log(c, AV_LOG_WARNING,
"Warning: dstStride is not aligned!\n"
" ->cannot do aligned memory accesses anymore\n");
warnedAlready = 1;
}
}
/* Note the user might start scaling the picture in the middle so this
will not get executed. This is not really intended but works
currently, so people might do it. */
* will not get executed. This is not really intended but works
* currently, so people might do it. */
if (srcSliceY == 0) {
lumBufIndex = -1;
chrBufIndex = -1;
@ -407,9 +428,11 @@ static int swScale(SwsContext *c, const uint8_t* src[],
(CONFIG_SWSCALE_ALPHA && alpPixBuf) ? dst[3] + dstStride[3] * dstY : NULL,
};
const int firstLumSrcY= FFMAX(1 - vLumFilterSize, vLumFilterPos[dstY]); //First line needed as input
// First line needed as input
const int firstLumSrcY = FFMAX(1 - vLumFilterSize, vLumFilterPos[dstY]);
const int firstLumSrcY2 = FFMAX(1 - vLumFilterSize, vLumFilterPos[FFMIN(dstY | ((1 << c->chrDstVSubSample) - 1), dstH - 1)]);
const int firstChrSrcY= FFMAX(1 - vChrFilterSize, vChrFilterPos[chrDstY]); //First line needed as input
// First line needed as input
const int firstChrSrcY = FFMAX(1 - vChrFilterSize, vChrFilterPos[chrDstY]);
// Last line needed as input
int lastLumSrcY = FFMIN(c->srcH, firstLumSrcY + vLumFilterSize) - 1;
@ -418,8 +441,10 @@ static int swScale(SwsContext *c, const uint8_t* src[],
int enough_lines;
// handle holes (FAST_BILINEAR & weird filters)
if (firstLumSrcY > lastInLumBuf) lastInLumBuf= firstLumSrcY-1;
if (firstChrSrcY > lastInChrBuf) lastInChrBuf= firstChrSrcY-1;
if (firstLumSrcY > lastInLumBuf)
lastInLumBuf = firstLumSrcY - 1;
if (firstChrSrcY > lastInChrBuf)
lastInChrBuf = firstChrSrcY - 1;
assert(firstLumSrcY >= lastInLumBuf - vLumBufSize + 1);
assert(firstChrSrcY >= lastInChrBuf - vChrBufSize + 1);
@ -430,7 +455,8 @@ static int swScale(SwsContext *c, const uint8_t* src[],
firstChrSrcY, lastChrSrcY, lastInChrBuf);
// Do we have enough lines in this slice to output the dstY line
enough_lines = lastLumSrcY2 < srcSliceY + srcSliceH && lastChrSrcY < -((-srcSliceY - srcSliceH)>>c->chrSrcVSubSample);
enough_lines = lastLumSrcY2 < srcSliceY + srcSliceH &&
lastChrSrcY < -((-srcSliceY - srcSliceH) >> c->chrSrcVSubSample);
if (!enough_lines) {
lastLumSrcY = srcSliceY + srcSliceH - 1;
@ -453,13 +479,11 @@ static int swScale(SwsContext *c, const uint8_t* src[],
assert(lastInLumBuf + 1 - srcSliceY >= 0);
hyscale(c, lumPixBuf[lumBufIndex], dstW, src1, srcW, lumXInc,
hLumFilter, hLumFilterPos, hLumFilterSize,
formatConvBuffer,
pal, 0);
formatConvBuffer, pal, 0);
if (CONFIG_SWSCALE_ALPHA && alpPixBuf)
hyscale(c, alpPixBuf[lumBufIndex], dstW, src1, srcW,
lumXInc, hLumFilter, hLumFilterPos, hLumFilterSize,
formatConvBuffer,
pal, 1);
formatConvBuffer, pal, 1);
lastInLumBuf++;
DEBUG_BUFFERS("\t\tlumBufIndex %d: lastInLumBuf: %d\n",
lumBufIndex, lastInLumBuf);
@ -487,20 +511,24 @@ static int swScale(SwsContext *c, const uint8_t* src[],
chrBufIndex, lastInChrBuf);
}
// wrap buf index around to stay inside the ring buffer
if (lumBufIndex >= vLumBufSize) lumBufIndex-= vLumBufSize;
if (chrBufIndex >= vChrBufSize) chrBufIndex-= vChrBufSize;
if (lumBufIndex >= vLumBufSize)
lumBufIndex -= vLumBufSize;
if (chrBufIndex >= vChrBufSize)
chrBufIndex -= vChrBufSize;
if (!enough_lines)
break; // we can't output a dstY line so let's try with the next slice
#if HAVE_MMX
updateMMXDitherTables(c, dstY, lumBufIndex, chrBufIndex, lastInLumBuf, lastInChrBuf);
updateMMXDitherTables(c, dstY, lumBufIndex, chrBufIndex,
lastInLumBuf, lastInChrBuf);
#endif
if (should_dither) {
c->chrDither8 = dither_8x8_128[chrDstY & 7];
c->lumDither8 = dither_8x8_128[dstY & 7];
}
if (dstY >= dstH - 2) {
// hmm looks like we can't use MMX here without overwriting this array's tail
/* hmm looks like we can't use MMX here without overwriting
* this array's tail */
ff_sws_init_output_funcs(c, &yuv2plane1, &yuv2planeX, &yuv2nv12cX,
&yuv2packed1, &yuv2packed2, &yuv2packedX);
}
@ -509,11 +537,14 @@ static int swScale(SwsContext *c, const uint8_t* src[],
const int16_t **lumSrcPtr = (const int16_t **)lumPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize;
const int16_t **chrUSrcPtr = (const int16_t **)chrUPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize;
const int16_t **chrVSrcPtr = (const int16_t **)chrVPixBuf + chrBufIndex + firstChrSrcY - lastInChrBuf + vChrBufSize;
const int16_t **alpSrcPtr= (CONFIG_SWSCALE_ALPHA && alpPixBuf) ? (const int16_t **) alpPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize : NULL;
const int16_t **alpSrcPtr = (CONFIG_SWSCALE_ALPHA && alpPixBuf) ?
(const int16_t **)alpPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize : NULL;
if (firstLumSrcY < 0 || firstLumSrcY + vLumFilterSize > c->srcH) {
const int16_t **tmpY = (const int16_t **) lumPixBuf + 2 * vLumBufSize;
int neg = -firstLumSrcY, i, end = FFMIN(c->srcH - firstLumSrcY, vLumFilterSize);
const int16_t **tmpY = (const int16_t **)lumPixBuf +
2 * vLumBufSize;
int neg = -firstLumSrcY, i;
int end = FFMIN(c->srcH - firstLumSrcY, vLumFilterSize);
for (i = 0; i < neg; i++)
tmpY[i] = lumSrcPtr[neg];
for (; i < end; i++)
@ -523,7 +554,8 @@ static int swScale(SwsContext *c, const uint8_t* src[],
lumSrcPtr = tmpY;
if (alpSrcPtr) {
const int16_t **tmpA = (const int16_t **) alpPixBuf + 2 * vLumBufSize;
const int16_t **tmpA = (const int16_t **)alpPixBuf +
2 * vLumBufSize;
for (i = 0; i < neg; i++)
tmpA[i] = alpSrcPtr[neg];
for (; i < end; i++)
@ -533,10 +565,12 @@ static int swScale(SwsContext *c, const uint8_t* src[],
alpSrcPtr = tmpA;
}
}
if (firstChrSrcY < 0 || firstChrSrcY + vChrFilterSize > c->chrSrcH) {
if (firstChrSrcY < 0 ||
firstChrSrcY + vChrFilterSize > c->chrSrcH) {
const int16_t **tmpU = (const int16_t **)chrUPixBuf + 2 * vChrBufSize,
**tmpV = (const int16_t **)chrVPixBuf + 2 * vChrBufSize;
int neg = -firstChrSrcY, i, end = FFMIN(c->chrSrcH - firstChrSrcY, vChrFilterSize);
int neg = -firstChrSrcY, i;
int end = FFMIN(c->chrSrcH - firstChrSrcY, vChrFilterSize);
for (i = 0; i < neg; i++) {
tmpU[i] = chrUSrcPtr[neg];
tmpV[i] = chrVSrcPtr[neg];
@ -553,47 +587,57 @@ static int swScale(SwsContext *c, const uint8_t* src[],
chrVSrcPtr = tmpV;
}
if (isPlanarYUV(dstFormat) || (isGray(dstFormat) && !isALPHA(dstFormat))) { //YV12 like
if (isPlanarYUV(dstFormat) ||
(isGray(dstFormat) && !isALPHA(dstFormat))) { // YV12 like
const int chrSkipMask = (1 << c->chrDstVSubSample) - 1;
if (vLumFilterSize == 1) {
yuv2plane1(lumSrcPtr[0], dest[0], dstW, c->lumDither8, 0);
} else {
yuv2planeX(vLumFilter + dstY * vLumFilterSize, vLumFilterSize,
lumSrcPtr, dest[0], dstW, c->lumDither8, 0);
yuv2planeX(vLumFilter + dstY * vLumFilterSize,
vLumFilterSize, lumSrcPtr, dest[0],
dstW, c->lumDither8, 0);
}
if (!((dstY & chrSkipMask) || isGray(dstFormat))) {
if (yuv2nv12cX) {
yuv2nv12cX(c, vChrFilter + chrDstY * vChrFilterSize, vChrFilterSize, chrUSrcPtr, chrVSrcPtr, dest[1], chrDstW);
yuv2nv12cX(c, vChrFilter + chrDstY * vChrFilterSize,
vChrFilterSize, chrUSrcPtr, chrVSrcPtr,
dest[1], chrDstW);
} else if (vChrFilterSize == 1) {
yuv2plane1(chrUSrcPtr[0], dest[1], chrDstW, c->chrDither8, 0);
yuv2plane1(chrVSrcPtr[0], dest[2], chrDstW, c->chrDither8, 3);
} else {
yuv2planeX(vChrFilter + chrDstY * vChrFilterSize, vChrFilterSize,
chrUSrcPtr, dest[1], chrDstW, c->chrDither8, 0);
yuv2planeX(vChrFilter + chrDstY * vChrFilterSize, vChrFilterSize,
chrVSrcPtr, dest[2], chrDstW, c->chrDither8, 3);
yuv2planeX(vChrFilter + chrDstY * vChrFilterSize,
vChrFilterSize, chrUSrcPtr, dest[1],
chrDstW, c->chrDither8, 0);
yuv2planeX(vChrFilter + chrDstY * vChrFilterSize,
vChrFilterSize, chrVSrcPtr, dest[2],
chrDstW, c->chrDither8, 3);
}
}
if (CONFIG_SWSCALE_ALPHA && alpPixBuf) {
if (vLumFilterSize == 1) {
yuv2plane1(alpSrcPtr[0], dest[3], dstW, c->lumDither8, 0);
yuv2plane1(alpSrcPtr[0], dest[3], dstW,
c->lumDither8, 0);
} else {
yuv2planeX(vLumFilter + dstY * vLumFilterSize, vLumFilterSize,
alpSrcPtr, dest[3], dstW, c->lumDither8, 0);
yuv2planeX(vLumFilter + dstY * vLumFilterSize,
vLumFilterSize, alpSrcPtr, dest[3],
dstW, c->lumDither8, 0);
}
}
} else {
assert(lumSrcPtr + vLumFilterSize - 1 < lumPixBuf + vLumBufSize * 2);
assert(chrUSrcPtr + vChrFilterSize - 1 < chrUPixBuf + vChrBufSize * 2);
if (c->yuv2packed1 && vLumFilterSize == 1 && vChrFilterSize <= 2) { //unscaled RGB
if (c->yuv2packed1 && vLumFilterSize == 1 &&
vChrFilterSize <= 2) { // unscaled RGB
int chrAlpha = vChrFilterSize == 1 ? 0 : vChrFilter[2 * dstY + 1];
yuv2packed1(c, *lumSrcPtr, chrUSrcPtr, chrVSrcPtr,
alpPixBuf ? *alpSrcPtr : NULL,
dest[0], dstW, chrAlpha, dstY);
} else if (c->yuv2packed2 && vLumFilterSize == 2 && vChrFilterSize == 2) { //bilinear upscale RGB
} else if (c->yuv2packed2 && vLumFilterSize == 2 &&
vChrFilterSize == 2) { // bilinear upscale RGB
int lumAlpha = vLumFilter[2 * dstY + 1];
int chrAlpha = vChrFilter[2 * dstY + 1];
lumMmxFilter[2] =
@ -654,7 +698,8 @@ static av_cold void sws_init_swScale_c(SwsContext *c)
c->hyScale = c->hcScale = hScale8To19_c;
}
} else {
c->hyScale = c->hcScale = c->dstBpc > 10 ? hScale16To19_c : hScale16To15_c;
c->hyScale = c->hcScale = c->dstBpc > 10 ? hScale16To19_c
: hScale16To15_c;
}
if (c->srcRange != c->dstRange && !isAnyRGB(c->dstFormat)) {

591
libswscale/utils.c
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