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-rw-r--r--libswscale/ppc/swscale_altivec.c7
-rw-r--r--libswscale/swscale.c268
-rw-r--r--libswscale/swscale_internal.h40
-rw-r--r--libswscale/x86/swscale_template.c159
4 files changed, 228 insertions, 246 deletions
diff --git a/libswscale/ppc/swscale_altivec.c b/libswscale/ppc/swscale_altivec.c
index 7161fe7963..14f35b64cb 100644
--- a/libswscale/ppc/swscale_altivec.c
+++ b/libswscale/ppc/swscale_altivec.c
@@ -98,10 +98,9 @@ yuv2yuvX_altivec_real(SwsContext *c,
int lumFilterSize, const int16_t *chrFilter,
const int16_t **chrUSrc, const int16_t **chrVSrc,
int chrFilterSize, const int16_t **alpSrc,
- uint8_t *dest, uint8_t *uDest,
- uint8_t *vDest, uint8_t *aDest,
- int dstW, int chrDstW)
+ uint8_t *dest[4], int dstW, int chrDstW)
{
+ uint8_t *yDest = dest[0], *uDest = dest[1], *vDest = dest[2];
const vector signed int vini = {(1 << 18), (1 << 18), (1 << 18), (1 << 18)};
register int i, j;
{
@@ -150,7 +149,7 @@ yuv2yuvX_altivec_real(SwsContext *c,
val[i] += lumSrc[j][i] * lumFilter[j];
}
}
- altivec_packIntArrayToCharArray(val, dest, dstW);
+ altivec_packIntArrayToCharArray(val, yDest, dstW);
}
if (uDest != 0) {
DECLARE_ALIGNED(16, int, u)[chrDstW];
diff --git a/libswscale/swscale.c b/libswscale/swscale.c
index e0dce96036..64ba97e7d4 100644
--- a/libswscale/swscale.c
+++ b/libswscale/swscale.c
@@ -199,13 +199,14 @@ yuv2yuvX16_c_template(const int16_t *lumFilter, const int16_t **lumSrc,
int lumFilterSize, const int16_t *chrFilter,
const int16_t **chrUSrc, const int16_t **chrVSrc,
int chrFilterSize, const int16_t **alpSrc,
- uint16_t *dest, uint16_t *uDest, uint16_t *vDest,
- uint16_t *aDest, int dstW, int chrDstW,
+ uint16_t *dest[4], int dstW, int chrDstW,
int big_endian, int output_bits)
{
//FIXME Optimize (just quickly written not optimized..)
int i;
int shift = 11 + 16 - output_bits;
+ uint16_t *yDest = dest[0], *uDest = dest[1], *vDest = dest[2],
+ *aDest = CONFIG_SWSCALE_ALPHA ? dest[3] : NULL;
#define output_pixel(pos, val) \
if (big_endian) { \
@@ -228,7 +229,7 @@ yuv2yuvX16_c_template(const int16_t *lumFilter, const int16_t **lumSrc,
for (j = 0; j < lumFilterSize; j++)
val += lumSrc[j][i] * lumFilter[j];
- output_pixel(&dest[i], val);
+ output_pixel(&yDest[i], val);
}
if (uDest) {
@@ -267,15 +268,11 @@ static void yuv2yuvX ## bits ## BE_LE ## _c(SwsContext *c, const int16_t *lumFil
const int16_t *chrFilter, const int16_t **chrUSrc, \
const int16_t **chrVSrc, \
int chrFilterSize, const int16_t **alpSrc, \
- uint8_t *_dest, uint8_t *_uDest, uint8_t *_vDest, \
- uint8_t *_aDest, int dstW, int chrDstW) \
+ uint8_t *_dest[4], int dstW, int chrDstW) \
{ \
- uint16_t *dest = (uint16_t *) _dest, *uDest = (uint16_t *) _uDest, \
- *vDest = (uint16_t *) _vDest, *aDest = (uint16_t *) _aDest; \
yuv2yuvX16_c_template(lumFilter, lumSrc, lumFilterSize, \
chrFilter, chrUSrc, chrVSrc, chrFilterSize, \
- alpSrc, \
- dest, uDest, vDest, aDest, \
+ alpSrc, (uint16_t **) _dest, \
dstW, chrDstW, is_be, bits); \
}
yuv2NBPS( 9, BE, 1);
@@ -290,18 +287,20 @@ static void yuv2yuvX_c(SwsContext *c, const int16_t *lumFilter,
const int16_t *chrFilter, const int16_t **chrUSrc,
const int16_t **chrVSrc,
int chrFilterSize, const int16_t **alpSrc,
- uint8_t *dest, uint8_t *uDest, uint8_t *vDest,
- uint8_t *aDest, int dstW, int chrDstW)
+ uint8_t *dest[4], int dstW, int chrDstW)
{
- //FIXME Optimize (just quickly written not optimized..)
+ uint8_t *yDest = dest[0], *uDest = dest[1], *vDest = dest[2],
+ *aDest = CONFIG_SWSCALE_ALPHA ? dest[3] : NULL;
int i;
+
+ //FIXME Optimize (just quickly written not optimized..)
for (i=0; i<dstW; i++) {
int val=1<<18;
int j;
for (j=0; j<lumFilterSize; j++)
val += lumSrc[j][i] * lumFilter[j];
- dest[i]= av_clip_uint8(val>>19);
+ yDest[i]= av_clip_uint8(val>>19);
}
if (uDest)
@@ -332,13 +331,15 @@ static void yuv2yuvX_c(SwsContext *c, const int16_t *lumFilter,
static void yuv2yuv1_c(SwsContext *c, const int16_t *lumSrc,
const int16_t *chrUSrc, const int16_t *chrVSrc,
const int16_t *alpSrc,
- uint8_t *dest, uint8_t *uDest, uint8_t *vDest,
- uint8_t *aDest, int dstW, int chrDstW)
+ uint8_t *dest[4], int dstW, int chrDstW)
{
+ uint8_t *yDest = dest[0], *uDest = dest[1], *vDest = dest[2],
+ *aDest = CONFIG_SWSCALE_ALPHA ? dest[3] : NULL;
int i;
+
for (i=0; i<dstW; i++) {
int val= (lumSrc[i]+64)>>7;
- dest[i]= av_clip_uint8(val);
+ yDest[i]= av_clip_uint8(val);
}
if (uDest)
@@ -360,10 +361,10 @@ static void yuv2nv12X_c(SwsContext *c, const int16_t *lumFilter,
const int16_t **lumSrc, int lumFilterSize,
const int16_t *chrFilter, const int16_t **chrUSrc,
const int16_t **chrVSrc, int chrFilterSize,
- const int16_t **alpSrc, uint8_t *dest, uint8_t *uDest,
- uint8_t *vDest, uint8_t *aDest,
+ const int16_t **alpSrc, uint8_t *dest[4],
int dstW, int chrDstW)
{
+ uint8_t *yDest = dest[0], *uDest = dest[1];
enum PixelFormat dstFormat = c->dstFormat;
//FIXME Optimize (just quickly written not optimized..)
@@ -374,7 +375,7 @@ static void yuv2nv12X_c(SwsContext *c, const int16_t *lumFilter,
for (j=0; j<lumFilterSize; j++)
val += lumSrc[j][i] * lumFilter[j];
- dest[i]= av_clip_uint8(val>>19);
+ yDest[i]= av_clip_uint8(val>>19);
}
if (!uDest)
@@ -447,16 +448,15 @@ yuv2gray16_X_c_template(SwsContext *c, const int16_t *lumFilter,
}
static av_always_inline void
-yuv2gray16_2_c_template(SwsContext *c, const uint16_t *buf0,
- const uint16_t *buf1, const uint16_t *ubuf0,
- const uint16_t *ubuf1, const uint16_t *vbuf0,
- const uint16_t *vbuf1, const uint16_t *abuf0,
- const uint16_t *abuf1, uint8_t *dest, int dstW,
+yuv2gray16_2_c_template(SwsContext *c, const int16_t *buf[2],
+ const int16_t *ubuf[2], const int16_t *vbuf[2],
+ const int16_t *abuf[2], uint8_t *dest, int dstW,
int yalpha, int uvalpha, int y,
enum PixelFormat target)
{
- int yalpha1 = 4095 - yalpha; \
+ int yalpha1 = 4095 - yalpha;
int i;
+ const int16_t *buf0 = buf[0], *buf1 = buf[1];
for (i = 0; i < (dstW >> 1); i++) {
const int i2 = 2 * i;
@@ -469,12 +469,10 @@ yuv2gray16_2_c_template(SwsContext *c, const uint16_t *buf0,
}
static av_always_inline void
-yuv2gray16_1_c_template(SwsContext *c, const uint16_t *buf0,
- const uint16_t *ubuf0, const uint16_t *ubuf1,
- const uint16_t *vbuf0, const uint16_t *vbuf1,
- const uint16_t *abuf0, uint8_t *dest, int dstW,
- int uvalpha, enum PixelFormat dstFormat,
- int flags, int y, enum PixelFormat target)
+yuv2gray16_1_c_template(SwsContext *c, const int16_t *buf0,
+ const int16_t *ubuf[2], const int16_t *vbuf[2],
+ const int16_t *abuf0, uint8_t *dest, int dstW,
+ int uvalpha, int y, enum PixelFormat target)
{
int i;
@@ -503,28 +501,22 @@ static void name ## ext ## _X_c(SwsContext *c, const int16_t *lumFilter, \
alpSrc, dest, dstW, y, fmt); \
} \
\
-static void name ## ext ## _2_c(SwsContext *c, const uint16_t *buf0, \
- const uint16_t *buf1, const uint16_t *ubuf0, \
- const uint16_t *ubuf1, const uint16_t *vbuf0, \
- const uint16_t *vbuf1, const uint16_t *abuf0, \
- const uint16_t *abuf1, uint8_t *dest, int dstW, \
+static void name ## ext ## _2_c(SwsContext *c, const int16_t *buf[2], \
+ const int16_t *ubuf[2], const int16_t *vbuf[2], \
+ const int16_t *abuf[2], uint8_t *dest, int dstW, \
int yalpha, int uvalpha, int y) \
{ \
- name ## base ## _2_c_template(c, buf0, buf1, ubuf0, ubuf1, \
- vbuf0, vbuf1, abuf0, abuf1, \
+ name ## base ## _2_c_template(c, buf, ubuf, vbuf, abuf, \
dest, dstW, yalpha, uvalpha, y, fmt); \
} \
\
-static void name ## ext ## _1_c(SwsContext *c, const uint16_t *buf0, \
- const uint16_t *ubuf0, const uint16_t *ubuf1, \
- const uint16_t *vbuf0, const uint16_t *vbuf1, \
- const uint16_t *abuf0, uint8_t *dest, int dstW, \
- int uvalpha, enum PixelFormat dstFormat, \
- int flags, int y) \
+static void name ## ext ## _1_c(SwsContext *c, const int16_t *buf0, \
+ const int16_t *ubuf[2], const int16_t *vbuf[2], \
+ const int16_t *abuf0, uint8_t *dest, int dstW, \
+ int uvalpha, int y) \
{ \
- name ## base ## _1_c_template(c, buf0, ubuf0, ubuf1, vbuf0, \
- vbuf1, abuf0, dest, dstW, uvalpha, \
- dstFormat, flags, y, fmt); \
+ name ## base ## _1_c_template(c, buf0, ubuf, vbuf, abuf0, dest, \
+ dstW, uvalpha, y, fmt); \
}
YUV2PACKEDWRAPPER(yuv2gray16,, LE, PIX_FMT_GRAY16LE);
@@ -574,14 +566,13 @@ yuv2mono_X_c_template(SwsContext *c, const int16_t *lumFilter,
}
static av_always_inline void
-yuv2mono_2_c_template(SwsContext *c, const uint16_t *buf0,
- const uint16_t *buf1, const uint16_t *ubuf0,
- const uint16_t *ubuf1, const uint16_t *vbuf0,
- const uint16_t *vbuf1, const uint16_t *abuf0,
- const uint16_t *abuf1, uint8_t *dest, int dstW,
+yuv2mono_2_c_template(SwsContext *c, const int16_t *buf[2],
+ const int16_t *ubuf[2], const int16_t *vbuf[2],
+ const int16_t *abuf[2], uint8_t *dest, int dstW,
int yalpha, int uvalpha, int y,
enum PixelFormat target)
{
+ const int16_t *buf0 = buf[0], *buf1 = buf[1];
const uint8_t * const d128 = dither_8x8_220[y & 7];
uint8_t *g = c->table_gU[128] + c->table_gV[128];
int yalpha1 = 4095 - yalpha;
@@ -601,12 +592,10 @@ yuv2mono_2_c_template(SwsContext *c, const uint16_t *buf0,
}
static av_always_inline void
-yuv2mono_1_c_template(SwsContext *c, const uint16_t *buf0,
- const uint16_t *ubuf0, const uint16_t *ubuf1,
- const uint16_t *vbuf0, const uint16_t *vbuf1,
- const uint16_t *abuf0, uint8_t *dest, int dstW,
- int uvalpha, enum PixelFormat dstFormat,
- int flags, int y, enum PixelFormat target)
+yuv2mono_1_c_template(SwsContext *c, const int16_t *buf0,
+ const int16_t *ubuf[2], const int16_t *vbuf[2],
+ const int16_t *abuf0, uint8_t *dest, int dstW,
+ int uvalpha, int y, enum PixelFormat target)
{
const uint8_t * const d128 = dither_8x8_220[y & 7];
uint8_t *g = c->table_gU[128] + c->table_gV[128];
@@ -683,14 +672,15 @@ yuv2422_X_c_template(SwsContext *c, const int16_t *lumFilter,
}
static av_always_inline void
-yuv2422_2_c_template(SwsContext *c, const uint16_t *buf0,
- const uint16_t *buf1, const uint16_t *ubuf0,
- const uint16_t *ubuf1, const uint16_t *vbuf0,
- const uint16_t *vbuf1, const uint16_t *abuf0,
- const uint16_t *abuf1, uint8_t *dest, int dstW,
+yuv2422_2_c_template(SwsContext *c, const int16_t *buf[2],
+ const int16_t *ubuf[2], const int16_t *vbuf[2],
+ const int16_t *abuf[2], uint8_t *dest, int dstW,
int yalpha, int uvalpha, int y,
enum PixelFormat target)
{
+ const int16_t *buf0 = buf[0], *buf1 = buf[1],
+ *ubuf0 = ubuf[0], *ubuf1 = ubuf[1],
+ *vbuf0 = vbuf[0], *vbuf1 = vbuf[1];
int yalpha1 = 4095 - yalpha;
int uvalpha1 = 4095 - uvalpha;
int i;
@@ -706,13 +696,13 @@ yuv2422_2_c_template(SwsContext *c, const uint16_t *buf0,
}
static av_always_inline void
-yuv2422_1_c_template(SwsContext *c, const uint16_t *buf0,
- const uint16_t *ubuf0, const uint16_t *ubuf1,
- const uint16_t *vbuf0, const uint16_t *vbuf1,
- const uint16_t *abuf0, uint8_t *dest, int dstW,
- int uvalpha, enum PixelFormat dstFormat,
- int flags, int y, enum PixelFormat target)
+yuv2422_1_c_template(SwsContext *c, const int16_t *buf0,
+ const int16_t *ubuf[2], const int16_t *vbuf[2],
+ const int16_t *abuf0, uint8_t *dest, int dstW,
+ int uvalpha, int y, enum PixelFormat target)
{
+ const int16_t *ubuf0 = ubuf[0], *ubuf1 = ubuf[1],
+ *vbuf0 = vbuf[0], *vbuf1 = vbuf[1];
int i;
if (uvalpha < 2048) {
@@ -797,14 +787,15 @@ yuv2rgb48_X_c_template(SwsContext *c, const int16_t *lumFilter,
}
static av_always_inline void
-yuv2rgb48_2_c_template(SwsContext *c, const uint16_t *buf0,
- const uint16_t *buf1, const uint16_t *ubuf0,
- const uint16_t *ubuf1, const uint16_t *vbuf0,
- const uint16_t *vbuf1, const uint16_t *abuf0,
- const uint16_t *abuf1, uint8_t *dest, int dstW,
+yuv2rgb48_2_c_template(SwsContext *c, const int16_t *buf[2],
+ const int16_t *ubuf[2], const int16_t *vbuf[2],
+ const int16_t *abuf[2], uint8_t *dest, int dstW,
int yalpha, int uvalpha, int y,
enum PixelFormat target)
{
+ const int16_t *buf0 = buf[0], *buf1 = buf[1],
+ *ubuf0 = ubuf[0], *ubuf1 = ubuf[1],
+ *vbuf0 = vbuf[0], *vbuf1 = vbuf[1];
int yalpha1 = 4095 - yalpha;
int uvalpha1 = 4095 - uvalpha;
int i;
@@ -829,13 +820,13 @@ yuv2rgb48_2_c_template(SwsContext *c, const uint16_t *buf0,
}
static av_always_inline void
-yuv2rgb48_1_c_template(SwsContext *c, const uint16_t *buf0,
- const uint16_t *ubuf0, const uint16_t *ubuf1,
- const uint16_t *vbuf0, const uint16_t *vbuf1,
- const uint16_t *abuf0, uint8_t *dest, int dstW,
- int uvalpha, enum PixelFormat dstFormat,
- int flags, int y, enum PixelFormat target)
+yuv2rgb48_1_c_template(SwsContext *c, const int16_t *buf0,
+ const int16_t *ubuf[2], const int16_t *vbuf[2],
+ const int16_t *abuf0, uint8_t *dest, int dstW,
+ int uvalpha, int y, enum PixelFormat target)
{
+ const int16_t *ubuf0 = ubuf[0], *ubuf1 = ubuf[1],
+ *vbuf0 = vbuf[0], *vbuf1 = vbuf[1];
int i;
if (uvalpha < 2048) {
@@ -1060,14 +1051,16 @@ yuv2rgb_X_c_template(SwsContext *c, const int16_t *lumFilter,
}
static av_always_inline void
-yuv2rgb_2_c_template(SwsContext *c, const uint16_t *buf0,
- const uint16_t *buf1, const uint16_t *ubuf0,
- const uint16_t *ubuf1, const uint16_t *vbuf0,
- const uint16_t *vbuf1, const uint16_t *abuf0,
- const uint16_t *abuf1, uint8_t *dest, int dstW,
+yuv2rgb_2_c_template(SwsContext *c, const int16_t *buf[2],
+ const int16_t *ubuf[2], const int16_t *vbuf[2],
+ const int16_t *abuf[2], uint8_t *dest, int dstW,
int yalpha, int uvalpha, int y,
enum PixelFormat target, int hasAlpha)
{
+ const int16_t *buf0 = buf[0], *buf1 = buf[1],
+ *ubuf0 = ubuf[0], *ubuf1 = ubuf[1],
+ *vbuf0 = vbuf[0], *vbuf1 = vbuf[1],
+ *abuf0 = abuf[0], *abuf1 = abuf[1];
int yalpha1 = 4095 - yalpha;
int uvalpha1 = 4095 - uvalpha;
int i;
@@ -1093,14 +1086,14 @@ yuv2rgb_2_c_template(SwsContext *c, const uint16_t *buf0,
}
static av_always_inline void
-yuv2rgb_1_c_template(SwsContext *c, const uint16_t *buf0,
- const uint16_t *ubuf0, const uint16_t *ubuf1,
- const uint16_t *vbuf0, const uint16_t *vbuf1,
- const uint16_t *abuf0, uint8_t *dest, int dstW,
- int uvalpha, enum PixelFormat dstFormat,
- int flags, int y, enum PixelFormat target,
+yuv2rgb_1_c_template(SwsContext *c, const int16_t *buf0,
+ const int16_t *ubuf[2], const int16_t *vbuf[2],
+ const int16_t *abuf0, uint8_t *dest, int dstW,
+ int uvalpha, int y, enum PixelFormat target,
int hasAlpha)
{
+ const int16_t *ubuf0 = ubuf[0], *ubuf1 = ubuf[1],
+ *vbuf0 = vbuf[0], *vbuf1 = vbuf[1];
int i;
if (uvalpha < 2048) {
@@ -1158,28 +1151,22 @@ static void name ## ext ## _X_c(SwsContext *c, const int16_t *lumFilter, \
}
#define YUV2RGBWRAPPER(name, base, ext, fmt, hasAlpha) \
YUV2RGBWRAPPERX(name, base, ext, fmt, hasAlpha) \
-static void name ## ext ## _2_c(SwsContext *c, const uint16_t *buf0, \
- const uint16_t *buf1, const uint16_t *ubuf0, \
- const uint16_t *ubuf1, const uint16_t *vbuf0, \
- const uint16_t *vbuf1, const uint16_t *abuf0, \
- const uint16_t *abuf1, uint8_t *dest, int dstW, \
+static void name ## ext ## _2_c(SwsContext *c, const int16_t *buf[2], \
+ const int16_t *ubuf[2], const int16_t *vbuf[2], \
+ const int16_t *abuf[2], uint8_t *dest, int dstW, \
int yalpha, int uvalpha, int y) \
{ \
- name ## base ## _2_c_template(c, buf0, buf1, ubuf0, ubuf1, \
- vbuf0, vbuf1, abuf0, abuf1, \
+ name ## base ## _2_c_template(c, buf, ubuf, vbuf, abuf, \
dest, dstW, yalpha, uvalpha, y, fmt, hasAlpha); \
} \
\
-static void name ## ext ## _1_c(SwsContext *c, const uint16_t *buf0, \
- const uint16_t *ubuf0, const uint16_t *ubuf1, \
- const uint16_t *vbuf0, const uint16_t *vbuf1, \
- const uint16_t *abuf0, uint8_t *dest, int dstW, \
- int uvalpha, enum PixelFormat dstFormat, \
- int flags, int y) \
+static void name ## ext ## _1_c(SwsContext *c, const int16_t *buf0, \
+ const int16_t *ubuf[2], const int16_t *vbuf[2], \
+ const int16_t *abuf0, uint8_t *dest, int dstW, \
+ int uvalpha, int y) \
{ \
- name ## base ## _1_c_template(c, buf0, ubuf0, ubuf1, vbuf0, \
- vbuf1, abuf0, dest, dstW, uvalpha, \
- dstFormat, flags, y, fmt, hasAlpha); \
+ name ## base ## _1_c_template(c, buf0, ubuf, vbuf, abuf0, dest, \
+ dstW, uvalpha, y, fmt, hasAlpha); \
}
#if CONFIG_SMALL
@@ -2279,11 +2266,13 @@ static int swScale(SwsContext *c, const uint8_t* src[],
lastDstY= dstY;
for (;dstY < dstH; dstY++) {
- unsigned char *dest =dst[0]+dstStride[0]*dstY;
const int chrDstY= dstY>>c->chrDstVSubSample;
- unsigned char *uDest=dst[1]+dstStride[1]*chrDstY;
- unsigned char *vDest=dst[2]+dstStride[2]*chrDstY;
- unsigned char *aDest=(CONFIG_SWSCALE_ALPHA && alpPixBuf) ? dst[3]+dstStride[3]*dstY : NULL;
+ uint8_t *dest[4] = {
+ dst[0] + dstStride[0] * dstY,
+ dst[1] + dstStride[1] * chrDstY,
+ dst[2] + dstStride[2] * chrDstY,
+ (CONFIG_SWSCALE_ALPHA && alpPixBuf) ? dst[3] + dstStride[3] * dstY : NULL,
+ };
const int firstLumSrcY= vLumFilterPos[dstY]; //First line needed as input
const int firstLumSrcY2= vLumFilterPos[FFMIN(dstY | ((1<<c->chrDstVSubSample) - 1), dstH-1)];
@@ -2377,46 +2366,43 @@ static int swScale(SwsContext *c, const uint8_t* src[],
const int16_t **alpSrcPtr= (CONFIG_SWSCALE_ALPHA && alpPixBuf) ? (const int16_t **) alpPixBuf + lumBufIndex + firstLumSrcY - lastInLumBuf + vLumBufSize : NULL;
if (isPlanarYUV(dstFormat) || dstFormat==PIX_FMT_GRAY8) { //YV12 like
const int chrSkipMask= (1<<c->chrDstVSubSample)-1;
- if ((dstY&chrSkipMask) || isGray(dstFormat)) uDest=vDest= NULL; //FIXME split functions in lumi / chromi
+ if ((dstY&chrSkipMask) || isGray(dstFormat))
+ dest[1] = dest[2] = NULL; //FIXME split functions in lumi / chromi
if (c->yuv2yuv1 && vLumFilterSize == 1 && vChrFilterSize == 1) { // unscaled YV12
- const int16_t *lumBuf = lumSrcPtr[0];
- const int16_t *chrUBuf= chrUSrcPtr[0];
- const int16_t *chrVBuf= chrVSrcPtr[0];
const int16_t *alpBuf= (CONFIG_SWSCALE_ALPHA && alpPixBuf) ? alpSrcPtr[0] : NULL;
- yuv2yuv1(c, lumBuf, chrUBuf, chrVBuf, alpBuf, dest,
- uDest, vDest, aDest, dstW, chrDstW);
+ yuv2yuv1(c, lumSrcPtr[0], chrUSrcPtr[0], chrVSrcPtr[0], alpBuf,
+ dest, dstW, chrDstW);
} else { //General YV12
- yuv2yuvX(c,
- vLumFilter+dstY*vLumFilterSize , lumSrcPtr, vLumFilterSize,
- vChrFilter+chrDstY*vChrFilterSize, chrUSrcPtr,
- chrVSrcPtr, vChrFilterSize,
- alpSrcPtr, dest, uDest, vDest, aDest, dstW, chrDstW);
+ yuv2yuvX(c, vLumFilter + dstY * vLumFilterSize,
+ lumSrcPtr, vLumFilterSize,
+ vChrFilter + chrDstY * vChrFilterSize,
+ chrUSrcPtr, chrVSrcPtr, vChrFilterSize,
+ alpSrcPtr, dest, dstW, chrDstW);
}
} else {
assert(lumSrcPtr + vLumFilterSize - 1 < lumPixBuf + vLumBufSize*2);
assert(chrUSrcPtr + vChrFilterSize - 1 < chrUPixBuf + vChrBufSize*2);
if (c->yuv2packed1 && vLumFilterSize == 1 && vChrFilterSize == 2) { //unscaled RGB
- int chrAlpha= vChrFilter[2*dstY+1];
- yuv2packed1(c, *lumSrcPtr, *chrUSrcPtr, *(chrUSrcPtr+1),
- *chrVSrcPtr, *(chrVSrcPtr+1),
- alpPixBuf ? *alpSrcPtr : NULL,
- dest, dstW, chrAlpha, dstFormat, flags, dstY);
+ int chrAlpha = 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
- int lumAlpha= vLumFilter[2*dstY+1];
- int chrAlpha= vChrFilter[2*dstY+1];
- lumMmxFilter[2]=
- lumMmxFilter[3]= vLumFilter[2*dstY ]*0x10001;
- chrMmxFilter[2]=
- chrMmxFilter[3]= vChrFilter[2*chrDstY]*0x10001;
- yuv2packed2(c, *lumSrcPtr, *(lumSrcPtr+1), *chrUSrcPtr, *(chrUSrcPtr+1),
- *chrVSrcPtr, *(chrVSrcPtr+1),
- alpPixBuf ? *alpSrcPtr : NULL, alpPixBuf ? *(alpSrcPtr+1) : NULL,
- dest, dstW, lumAlpha, chrAlpha, dstY);
+ int lumAlpha = vLumFilter[2 * dstY + 1];
+ int chrAlpha = vChrFilter[2 * dstY + 1];
+ lumMmxFilter[2] =
+ lumMmxFilter[3] = vLumFilter[2 * dstY ] * 0x10001;
+ chrMmxFilter[2] =
+ chrMmxFilter[3] = vChrFilter[2 * chrDstY] * 0x10001;
+ yuv2packed2(c, lumSrcPtr, chrUSrcPtr, chrVSrcPtr,
+ alpPixBuf ? alpSrcPtr : NULL,
+ dest[0], dstW, lumAlpha, chrAlpha, dstY);
} else { //general RGB
- yuv2packedX(c,
- vLumFilter+dstY*vLumFilterSize, lumSrcPtr, vLumFilterSize,
- vChrFilter+dstY*vChrFilterSize, chrUSrcPtr, chrVSrcPtr, vChrFilterSize,
- alpSrcPtr, dest, dstW, dstY);
+ yuv2packedX(c, vLumFilter + dstY * vLumFilterSize,
+ lumSrcPtr, vLumFilterSize,
+ vChrFilter + dstY * vChrFilterSize,
+ chrUSrcPtr, chrVSrcPtr, vChrFilterSize,
+ alpSrcPtr, dest[0], dstW, dstY);
}
}
}
diff --git a/libswscale/swscale_internal.h b/libswscale/swscale_internal.h
index 9967c99eda..453cc9ee5e 100644
--- a/libswscale/swscale_internal.h
+++ b/libswscale/swscale_internal.h
@@ -60,37 +60,27 @@ typedef int (*SwsFunc)(struct SwsContext *context, const uint8_t* src[],
typedef void (*yuv2planar1_fn) (struct SwsContext *c,
const int16_t *lumSrc, const int16_t *chrUSrc,
const int16_t *chrVSrc, const int16_t *alpSrc,
- uint8_t *dest,
- uint8_t *uDest, uint8_t *vDest, uint8_t *aDest,
- int dstW, int chrDstW);
-typedef void (*yuv2planarX_fn) (struct SwsContext *c,
- const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
+ uint8_t *dest[4], int dstW, int chrDstW);
+typedef void (*yuv2planarX_fn) (struct SwsContext *c, const int16_t *lumFilter,
+ const int16_t **lumSrc, int lumFilterSize,
const int16_t *chrFilter, const int16_t **chrUSrc,
- const int16_t **chrVSrc, int chrFilterSize,
- const int16_t **alpSrc,
- uint8_t *dest,
- uint8_t *uDest, uint8_t *vDest, uint8_t *aDest,
+ const int16_t **chrVSrc, int chrFilterSize,
+ const int16_t **alpSrc, uint8_t *dest[4],
int dstW, int chrDstW);
-typedef void (*yuv2packed1_fn) (struct SwsContext *c,
- const uint16_t *buf0,
- const uint16_t *ubuf0, const uint16_t *ubuf1,
- const uint16_t *vbuf0, const uint16_t *vbuf1,
- const uint16_t *abuf0,
- uint8_t *dest,
- int dstW, int uvalpha, int dstFormat, int flags, int y);
-typedef void (*yuv2packed2_fn) (struct SwsContext *c,
- const uint16_t *buf0, const uint16_t *buf1,
- const uint16_t *ubuf0, const uint16_t *ubuf1,
- const uint16_t *vbuf0, const uint16_t *vbuf1,
- const uint16_t *abuf0, const uint16_t *abuf1,
- uint8_t *dest,
+typedef void (*yuv2packed1_fn) (struct SwsContext *c, const int16_t *lumSrc,
+ const int16_t *chrUSrc[2], const int16_t *chrVSrc[2],
+ const int16_t *alpSrc, uint8_t *dest,
+ int dstW, int uvalpha, int y);
+typedef void (*yuv2packed2_fn) (struct SwsContext *c, const int16_t *lumSrc[2],
+ const int16_t *chrUSrc[2], const int16_t *chrVSrc[2],
+ const int16_t *alpSrc[2], uint8_t *dest,
int dstW, int yalpha, int uvalpha, int y);
-typedef void (*yuv2packedX_fn) (struct SwsContext *c,
- const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,
+typedef void (*yuv2packedX_fn) (struct SwsContext *c, const int16_t *lumFilter,
+ const int16_t **lumSrc, int lumFilterSize,
const int16_t *chrFilter, const int16_t **chrUSrc,
const int16_t **chrVSrc, int chrFilterSize,
const int16_t **alpSrc, uint8_t *dest,
- int dstW, int dstY);
+ int dstW, int y);
/* This struct should be aligned on at least a 32-byte boundary. */
typedef struct SwsContext {
diff --git a/libswscale/x86/swscale_template.c b/libswscale/x86/swscale_template.c
index f6e970832d..de0e4abfe0 100644
--- a/libswscale/x86/swscale_template.c
+++ b/libswscale/x86/swscale_template.c
@@ -75,9 +75,11 @@ static void RENAME(yuv2yuvX)(SwsContext *c, const int16_t *lumFilter,
const int16_t *chrFilter, const int16_t **chrUSrc,
const int16_t **chrVSrc,
int chrFilterSize, const int16_t **alpSrc,
- uint8_t *dest, uint8_t *uDest, uint8_t *vDest,
- uint8_t *aDest, int dstW, int chrDstW)
+ uint8_t *dest[4], int dstW, int chrDstW)
{
+ uint8_t *yDest = dest[0], *uDest = dest[1], *vDest = dest[2],
+ *aDest = CONFIG_SWSCALE_ALPHA ? dest[3] : NULL;
+
if (uDest) {
x86_reg uv_off = c->uv_off;
YSCALEYUV2YV12X(CHR_MMX_FILTER_OFFSET, uDest, chrDstW, 0)
@@ -87,7 +89,7 @@ static void RENAME(yuv2yuvX)(SwsContext *c, const int16_t *lumFilter,
YSCALEYUV2YV12X(ALP_MMX_FILTER_OFFSET, aDest, dstW, 0)
}
- YSCALEYUV2YV12X(LUM_MMX_FILTER_OFFSET, dest, dstW, 0)
+ YSCALEYUV2YV12X(LUM_MMX_FILTER_OFFSET, yDest, dstW, 0)
}
#define YSCALEYUV2YV12X_ACCURATE(offset, dest, end, pos) \
@@ -156,9 +158,11 @@ static void RENAME(yuv2yuvX_ar)(SwsContext *c, const int16_t *lumFilter,
const int16_t *chrFilter, const int16_t **chrUSrc,
const int16_t **chrVSrc,
int chrFilterSize, const int16_t **alpSrc,
- uint8_t *dest, uint8_t *uDest, uint8_t *vDest,
- uint8_t *aDest, int dstW, int chrDstW)
+ uint8_t *dest[4], int dstW, int chrDstW)
{
+ uint8_t *yDest = dest[0], *uDest = dest[1], *vDest = dest[2],
+ *aDest = CONFIG_SWSCALE_ALPHA ? dest[3] : NULL;
+
if (uDest) {
x86_reg uv_off = c->uv_off;
YSCALEYUV2YV12X_ACCURATE(CHR_MMX_FILTER_OFFSET, uDest, chrDstW, 0)
@@ -168,19 +172,20 @@ static void RENAME(yuv2yuvX_ar)(SwsContext *c, const int16_t *lumFilter,
YSCALEYUV2YV12X_ACCURATE(ALP_MMX_FILTER_OFFSET, aDest, dstW, 0)
}
- YSCALEYUV2YV12X_ACCURATE(LUM_MMX_FILTER_OFFSET, dest, dstW, 0)
+ YSCALEYUV2YV12X_ACCURATE(LUM_MMX_FILTER_OFFSET, yDest, dstW, 0)
}
static void RENAME(yuv2yuv1)(SwsContext *c, const int16_t *lumSrc,
const int16_t *chrUSrc, const int16_t *chrVSrc,
const int16_t *alpSrc,
- uint8_t *dest, uint8_t *uDest, uint8_t *vDest,
- uint8_t *aDest, int dstW, int chrDstW)
+ uint8_t *dst[4], int dstW, int chrDstW)
{
int p= 4;
- const int16_t *src[4]= { alpSrc + dstW, lumSrc + dstW, chrUSrc + chrDstW, chrVSrc + chrDstW };
- uint8_t *dst[4]= { aDest, dest, uDest, vDest };
- x86_reg counter[4]= { dstW, dstW, chrDstW, chrDstW };
+ const int16_t *src[4]= {
+ lumSrc + dstW, chrUSrc + chrDstW,
+ chrVSrc + chrDstW, alpSrc + dstW
+ };
+ x86_reg counter[4]= { dstW, chrDstW, chrDstW, dstW };
while (p--) {
if (dst[p]) {
@@ -207,13 +212,14 @@ static void RENAME(yuv2yuv1)(SwsContext *c, const int16_t *lumSrc,
static void RENAME(yuv2yuv1_ar)(SwsContext *c, const int16_t *lumSrc,
const int16_t *chrUSrc, const int16_t *chrVSrc,
const int16_t *alpSrc,
- uint8_t *dest, uint8_t *uDest, uint8_t *vDest,
- uint8_t *aDest, int dstW, int chrDstW)
+ uint8_t *dst[4], int dstW, int chrDstW)
{
int p= 4;
- const int16_t *src[4]= { alpSrc + dstW, lumSrc + dstW, chrUSrc + chrDstW, chrVSrc + chrDstW };
- uint8_t *dst[4]= { aDest, dest, uDest, vDest };
- x86_reg counter[4]= { dstW, dstW, chrDstW, chrDstW };
+ const int16_t *src[4]= {
+ lumSrc + dstW, chrUSrc + chrDstW,
+ chrVSrc + chrDstW, alpSrc + dstW
+ };
+ x86_reg counter[4]= { dstW, chrDstW, chrDstW, dstW };
while (p--) {
if (dst[p]) {
@@ -969,14 +975,16 @@ static void RENAME(yuv2yuyv422_X)(SwsContext *c, const int16_t *lumFilter,
/**
* vertical bilinear scale YV12 to RGB
*/
-static void RENAME(yuv2rgb32_2)(SwsContext *c, const uint16_t *buf0,
- const uint16_t *buf1, const uint16_t *ubuf0,
- const uint16_t *ubuf1, const uint16_t *vbuf0,
- const uint16_t *vbuf1, const uint16_t *abuf0,
- const uint16_t *abuf1, uint8_t *dest,
+static void RENAME(yuv2rgb32_2)(SwsContext *c, const int16_t *buf[2],
+ const int16_t *ubuf[2], const int16_t *vbuf[2],
+ const int16_t *abuf[2], uint8_t *dest,
int dstW, int yalpha, int uvalpha, int y)
{
+ const int16_t *buf0 = buf[0], *buf1 = buf[1],
+ *ubuf0 = ubuf[0], *ubuf1 = ubuf[1];
+
if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {
+ const int16_t *abuf0 = abuf[0], *abuf1 = abuf[1];
#if ARCH_X86_64
__asm__ volatile(
YSCALEYUV2RGB(%%r8, %5)
@@ -1031,13 +1039,14 @@ static void RENAME(yuv2rgb32_2)(SwsContext *c, const uint16_t *buf0,
}
}
-static void RENAME(yuv2bgr24_2)(SwsContext *c, const uint16_t *buf0,
- const uint16_t *buf1, const uint16_t *ubuf0,
- const uint16_t *ubuf1, const uint16_t *vbuf0,
- const uint16_t *vbuf1, const uint16_t *abuf0,
- const uint16_t *abuf1, uint8_t *dest,
+static void RENAME(yuv2bgr24_2)(SwsContext *c, const int16_t *buf[2],
+ const int16_t *ubuf[2], const int16_t *vbuf[2],
+ const int16_t *abuf[2], uint8_t *dest,
int dstW, int yalpha, int uvalpha, int y)
{
+ const int16_t *buf0 = buf[0], *buf1 = buf[1],
+ *ubuf0 = ubuf[0], *ubuf1 = ubuf[1];
+
//Note 8280 == DSTW_OFFSET but the preprocessor can't handle that there :(
__asm__ volatile(
"mov %%"REG_b", "ESP_OFFSET"(%5) \n\t"
@@ -1053,13 +1062,14 @@ static void RENAME(yuv2bgr24_2)(SwsContext *c, const uint16_t *buf0,
);
}
-static void RENAME(yuv2rgb555_2)(SwsContext *c, const uint16_t *buf0,
- const uint16_t *buf1, const uint16_t *ubuf0,
- const uint16_t *ubuf1, const uint16_t *vbuf0,
- const uint16_t *vbuf1, const uint16_t *abuf0,
- const uint16_t *abuf1, uint8_t *dest,
+static void RENAME(yuv2rgb555_2)(SwsContext *c, const int16_t *buf[2],
+ const int16_t *ubuf[2], const int16_t *vbuf[2],
+ const int16_t *abuf[2], uint8_t *dest,
int dstW, int yalpha, int uvalpha, int y)
{
+ const int16_t *buf0 = buf[0], *buf1 = buf[1],
+ *ubuf0 = ubuf[0], *ubuf1 = ubuf[1];
+
//Note 8280 == DSTW_OFFSET but the preprocessor can't handle that there :(
__asm__ volatile(
"mov %%"REG_b", "ESP_OFFSET"(%5) \n\t"
@@ -1081,13 +1091,14 @@ static void RENAME(yuv2rgb555_2)(SwsContext *c, const uint16_t *buf0,
);
}
-static void RENAME(yuv2rgb565_2)(SwsContext *c, const uint16_t *buf0,
- const uint16_t *buf1, const uint16_t *ubuf0,
- const uint16_t *ubuf1, const uint16_t *vbuf0,
- const uint16_t *vbuf1, const uint16_t *abuf0,
- const uint16_t *abuf1, uint8_t *dest,
+static void RENAME(yuv2rgb565_2)(SwsContext *c, const int16_t *buf[2],
+ const int16_t *ubuf[2], const int16_t *vbuf[2],
+ const int16_t *abuf[2], uint8_t *dest,
int dstW, int yalpha, int uvalpha, int y)
{
+ const int16_t *buf0 = buf[0], *buf1 = buf[1],
+ *ubuf0 = ubuf[0], *ubuf1 = ubuf[1];
+
//Note 8280 == DSTW_OFFSET but the preprocessor can't handle that there :(
__asm__ volatile(
"mov %%"REG_b", "ESP_OFFSET"(%5) \n\t"
@@ -1149,13 +1160,14 @@ static void RENAME(yuv2rgb565_2)(SwsContext *c, const uint16_t *buf0,
#define YSCALEYUV2PACKED(index, c) REAL_YSCALEYUV2PACKED(index, c)
-static void RENAME(yuv2yuyv422_2)(SwsContext *c, const uint16_t *buf0,
- const uint16_t *buf1, const uint16_t *ubuf0,
- const uint16_t *ubuf1, const uint16_t *vbuf0,
- const uint16_t *vbuf1, const uint16_t *abuf0,
- const uint16_t *abuf1, uint8_t *dest,
+static void RENAME(yuv2yuyv422_2)(SwsContext *c, const int16_t *buf[2],
+ const int16_t *ubuf[2], const int16_t *vbuf[2],
+ const int16_t *abuf[2], uint8_t *dest,
int dstW, int yalpha, int uvalpha, int y)
{
+ const int16_t *buf0 = buf[0], *buf1 = buf[1],
+ *ubuf0 = ubuf[0], *ubuf1 = ubuf[1];
+
//Note 8280 == DSTW_OFFSET but the preprocessor can't handle that there :(
__asm__ volatile(
"mov %%"REG_b", "ESP_OFFSET"(%5) \n\t"
@@ -1288,14 +1300,13 @@ static void RENAME(yuv2yuyv422_2)(SwsContext *c, const uint16_t *buf0,
/**
* YV12 to RGB without scaling or interpolating
*/
-static void RENAME(yuv2rgb32_1)(SwsContext *c, const uint16_t *buf0,
- const uint16_t *ubuf0, const uint16_t *ubuf1,
- const uint16_t *vbuf0, const uint16_t *vbuf1,
- const uint16_t *abuf0, uint8_t *dest,
- int dstW, int uvalpha, enum PixelFormat dstFormat,
- int flags, int y)
+static void RENAME(yuv2rgb32_1)(SwsContext *c, const int16_t *buf0,
+ const int16_t *ubuf[2], const int16_t *bguf[2],
+ const int16_t *abuf0, uint8_t *dest,
+ int dstW, int uvalpha, int y)
{
- const uint16_t *buf1= buf0; //FIXME needed for RGB1/BGR1
+ const int16_t *ubuf0 = ubuf[0], *ubuf1 = ubuf[1];
+ const int16_t *buf1= buf0; //FIXME needed for RGB1/BGR1
if (uvalpha < 2048) { // note this is not correct (shifts chrominance by 0.5 pixels) but it is a bit faster
if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {
@@ -1356,14 +1367,13 @@ static void RENAME(yuv2rgb32_1)(SwsContext *c, const uint16_t *buf0,
}
}
-static void RENAME(yuv2bgr24_1)(SwsContext *c, const uint16_t *buf0,
- const uint16_t *ubuf0, const uint16_t *ubuf1,
- const uint16_t *vbuf0, const uint16_t *vbuf1,
- const uint16_t *abuf0, uint8_t *dest,
- int dstW, int uvalpha, enum PixelFormat dstFormat,
- int flags, int y)
+static void RENAME(yuv2bgr24_1)(SwsContext *c, const int16_t *buf0,
+ const int16_t *ubuf[2], const int16_t *bguf[2],
+ const int16_t *abuf0, uint8_t *dest,
+ int dstW, int uvalpha, int y)
{
- const uint16_t *buf1= buf0; //FIXME needed for RGB1/BGR1
+ const int16_t *ubuf0 = ubuf[0], *ubuf1 = ubuf[1];
+ const int16_t *buf1= buf0; //FIXME needed for RGB1/BGR1
if (uvalpha < 2048) { // note this is not correct (shifts chrominance by 0.5 pixels) but it is a bit faster
__asm__ volatile(
@@ -1394,14 +1404,13 @@ static void RENAME(yuv2bgr24_1)(SwsContext *c, const uint16_t *buf0,
}
}
-static void RENAME(yuv2rgb555_1)(SwsContext *c, const uint16_t *buf0,
- const uint16_t *ubuf0, const uint16_t *ubuf1,
- const uint16_t *vbuf0, const uint16_t *vbuf1,
- const uint16_t *abuf0, uint8_t *dest,
- int dstW, int uvalpha, enum PixelFormat dstFormat,
- int flags, int y)
+static void RENAME(yuv2rgb555_1)(SwsContext *c, const int16_t *buf0,
+ const int16_t *ubuf[2], const int16_t *bguf[2],
+ const int16_t *abuf0, uint8_t *dest,
+ int dstW, int uvalpha, int y)
{
- const uint16_t *buf1= buf0; //FIXME needed for RGB1/BGR1
+ const int16_t *ubuf0 = ubuf[0], *ubuf1 = ubuf[1];
+ const int16_t *buf1= buf0; //FIXME needed for RGB1/BGR1
if (uvalpha < 2048) { // note this is not correct (shifts chrominance by 0.5 pixels) but it is a bit faster
__asm__ volatile(
@@ -1444,14 +1453,13 @@ static void RENAME(yuv2rgb555_1)(SwsContext *c, const uint16_t *buf0,
}
}
-static void RENAME(yuv2rgb565_1)(SwsContext *c, const uint16_t *buf0,
- const uint16_t *ubuf0, const uint16_t *ubuf1,
- const uint16_t *vbuf0, const uint16_t *vbuf1,
- const uint16_t *abuf0, uint8_t *dest,
- int dstW, int uvalpha, enum PixelFormat dstFormat,
- int flags, int y)
+static void RENAME(yuv2rgb565_1)(SwsContext *c, const int16_t *buf0,
+ const int16_t *ubuf[2], const int16_t *bguf[2],
+ const int16_t *abuf0, uint8_t *dest,
+ int dstW, int uvalpha, int y)
{
- const uint16_t *buf1= buf0; //FIXME needed for RGB1/BGR1
+ const int16_t *ubuf0 = ubuf[0], *ubuf1 = ubuf[1];
+ const int16_t *buf1= buf0; //FIXME needed for RGB1/BGR1
if (uvalpha < 2048) { // note this is not correct (shifts chrominance by 0.5 pixels) but it is a bit faster
__asm__ volatile(
@@ -1531,14 +1539,13 @@ static void RENAME(yuv2rgb565_1)(SwsContext *c, const uint16_t *buf0,
"psraw $7, %%mm7 \n\t"
#define YSCALEYUV2PACKED1b(index, c) REAL_YSCALEYUV2PACKED1b(index, c)
-static void RENAME(yuv2yuyv422_1)(SwsContext *c, const uint16_t *buf0,
- const uint16_t *ubuf0, const uint16_t *ubuf1,
- const uint16_t *vbuf0, const uint16_t *vbuf1,
- const uint16_t *abuf0, uint8_t *dest,
- int dstW, int uvalpha, enum PixelFormat dstFormat,
- int flags, int y)
+static void RENAME(yuv2yuyv422_1)(SwsContext *c, const int16_t *buf0,
+ const int16_t *ubuf[2], const int16_t *bguf[2],
+ const int16_t *abuf0, uint8_t *dest,
+ int dstW, int uvalpha, int y)
{
- const uint16_t *buf1= buf0; //FIXME needed for RGB1/BGR1
+ const int16_t *ubuf0 = ubuf[0], *ubuf1 = ubuf[1];
+ const int16_t *buf1= buf0; //FIXME needed for RGB1/BGR1
if (uvalpha < 2048) { // note this is not correct (shifts chrominance by 0.5 pixels) but it is a bit faster
__asm__ volatile(
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-02 19:53:46 +0000