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ffmpeg/libswscale/swscale_unscaled.c

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/*
* Copyright (C) 2001-2011 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 <inttypes.h>
#include <string.h>
#include <math.h>
#include <stdio.h>
#include "config.h"
#include "swscale.h"
#include "swscale_internal.h"
#include "rgb2rgb.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/cpu.h"
#include "libavutil/avutil.h"
#include "libavutil/mathematics.h"
#include "libavutil/bswap.h"
#include "libavutil/pixdesc.h"
#include "libavutil/avassert.h"
DECLARE_ALIGNED(8, const uint8_t, dithers)[8][8][8]={
{
{ 0, 1, 0, 1, 0, 1, 0, 1,},
{ 1, 0, 1, 0, 1, 0, 1, 0,},
{ 0, 1, 0, 1, 0, 1, 0, 1,},
{ 1, 0, 1, 0, 1, 0, 1, 0,},
{ 0, 1, 0, 1, 0, 1, 0, 1,},
{ 1, 0, 1, 0, 1, 0, 1, 0,},
{ 0, 1, 0, 1, 0, 1, 0, 1,},
{ 1, 0, 1, 0, 1, 0, 1, 0,},
},{
{ 1, 2, 1, 2, 1, 2, 1, 2,},
{ 3, 0, 3, 0, 3, 0, 3, 0,},
{ 1, 2, 1, 2, 1, 2, 1, 2,},
{ 3, 0, 3, 0, 3, 0, 3, 0,},
{ 1, 2, 1, 2, 1, 2, 1, 2,},
{ 3, 0, 3, 0, 3, 0, 3, 0,},
{ 1, 2, 1, 2, 1, 2, 1, 2,},
{ 3, 0, 3, 0, 3, 0, 3, 0,},
},{
{ 2, 4, 3, 5, 2, 4, 3, 5,},
{ 6, 0, 7, 1, 6, 0, 7, 1,},
{ 3, 5, 2, 4, 3, 5, 2, 4,},
{ 7, 1, 6, 0, 7, 1, 6, 0,},
{ 2, 4, 3, 5, 2, 4, 3, 5,},
{ 6, 0, 7, 1, 6, 0, 7, 1,},
{ 3, 5, 2, 4, 3, 5, 2, 4,},
{ 7, 1, 6, 0, 7, 1, 6, 0,},
},{
{ 4, 8, 7, 11, 4, 8, 7, 11,},
{ 12, 0, 15, 3, 12, 0, 15, 3,},
{ 6, 10, 5, 9, 6, 10, 5, 9,},
{ 14, 2, 13, 1, 14, 2, 13, 1,},
{ 4, 8, 7, 11, 4, 8, 7, 11,},
{ 12, 0, 15, 3, 12, 0, 15, 3,},
{ 6, 10, 5, 9, 6, 10, 5, 9,},
{ 14, 2, 13, 1, 14, 2, 13, 1,},
},{
{ 9, 17, 15, 23, 8, 16, 14, 22,},
{ 25, 1, 31, 7, 24, 0, 30, 6,},
{ 13, 21, 11, 19, 12, 20, 10, 18,},
{ 29, 5, 27, 3, 28, 4, 26, 2,},
{ 8, 16, 14, 22, 9, 17, 15, 23,},
{ 24, 0, 30, 6, 25, 1, 31, 7,},
{ 12, 20, 10, 18, 13, 21, 11, 19,},
{ 28, 4, 26, 2, 29, 5, 27, 3,},
},{
{ 18, 34, 30, 46, 17, 33, 29, 45,},
{ 50, 2, 62, 14, 49, 1, 61, 13,},
{ 26, 42, 22, 38, 25, 41, 21, 37,},
{ 58, 10, 54, 6, 57, 9, 53, 5,},
{ 16, 32, 28, 44, 19, 35, 31, 47,},
{ 48, 0, 60, 12, 51, 3, 63, 15,},
{ 24, 40, 20, 36, 27, 43, 23, 39,},
{ 56, 8, 52, 4, 59, 11, 55, 7,},
},{
{ 18, 34, 30, 46, 17, 33, 29, 45,},
{ 50, 2, 62, 14, 49, 1, 61, 13,},
{ 26, 42, 22, 38, 25, 41, 21, 37,},
{ 58, 10, 54, 6, 57, 9, 53, 5,},
{ 16, 32, 28, 44, 19, 35, 31, 47,},
{ 48, 0, 60, 12, 51, 3, 63, 15,},
{ 24, 40, 20, 36, 27, 43, 23, 39,},
{ 56, 8, 52, 4, 59, 11, 55, 7,},
},{
{ 36, 68, 60, 92, 34, 66, 58, 90,},
{ 100, 4,124, 28, 98, 2,122, 26,},
{ 52, 84, 44, 76, 50, 82, 42, 74,},
{ 116, 20,108, 12,114, 18,106, 10,},
{ 32, 64, 56, 88, 38, 70, 62, 94,},
{ 96, 0,120, 24,102, 6,126, 30,},
{ 48, 80, 40, 72, 54, 86, 46, 78,},
{ 112, 16,104, 8,118, 22,110, 14,},
}};
const uint16_t dither_scale[15][16]={
{ 2, 3, 3, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,},
{ 2, 3, 7, 7, 13, 13, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25,},
{ 3, 3, 4, 15, 15, 29, 57, 57, 57, 113, 113, 113, 113, 113, 113, 113,},
{ 3, 4, 4, 5, 31, 31, 61, 121, 241, 241, 241, 241, 481, 481, 481, 481,},
{ 3, 4, 5, 5, 6, 63, 63, 125, 249, 497, 993, 993, 993, 993, 993, 1985,},
{ 3, 5, 6, 6, 6, 7, 127, 127, 253, 505, 1009, 2017, 4033, 4033, 4033, 4033,},
{ 3, 5, 6, 7, 7, 7, 8, 255, 255, 509, 1017, 2033, 4065, 8129,16257,16257,},
{ 3, 5, 6, 8, 8, 8, 8, 9, 511, 511, 1021, 2041, 4081, 8161,16321,32641,},
{ 3, 5, 7, 8, 9, 9, 9, 9, 10, 1023, 1023, 2045, 4089, 8177,16353,32705,},
{ 3, 5, 7, 8, 10, 10, 10, 10, 10, 11, 2047, 2047, 4093, 8185,16369,32737,},
{ 3, 5, 7, 8, 10, 11, 11, 11, 11, 11, 12, 4095, 4095, 8189,16377,32753,},
{ 3, 5, 7, 9, 10, 12, 12, 12, 12, 12, 12, 13, 8191, 8191,16381,32761,},
{ 3, 5, 7, 9, 10, 12, 13, 13, 13, 13, 13, 13, 14,16383,16383,32765,},
{ 3, 5, 7, 9, 10, 12, 14, 14, 14, 14, 14, 14, 14, 15,32767,32767,},
{ 3, 5, 7, 9, 11, 12, 14, 15, 15, 15, 15, 15, 15, 15, 16,65535,},
};
static void fillPlane(uint8_t *plane, int stride, int width, int height, int y,
uint8_t val)
{
int i;
uint8_t *ptr = plane + stride * y;
for (i = 0; i < height; i++) {
memset(ptr, val, width);
ptr += stride;
}
}
static void copyPlane(const uint8_t *src, int srcStride,
int srcSliceY, int srcSliceH, int width,
uint8_t *dst, int dstStride)
{
dst += dstStride * srcSliceY;
if (dstStride == srcStride && srcStride > 0) {
memcpy(dst, src, srcSliceH * dstStride);
} else {
int i;
for (i = 0; i < srcSliceH; i++) {
memcpy(dst, src, width);
src += srcStride;
dst += dstStride;
}
}
}
static int planarToNv12Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY,
int srcSliceH, uint8_t *dstParam[],
int dstStride[])
{
uint8_t *dst = dstParam[1] + dstStride[1] * srcSliceY / 2;
copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
dstParam[0], dstStride[0]);
if (c->dstFormat == AV_PIX_FMT_NV12)
interleaveBytes(src[1], src[2], dst, c->srcW / 2, srcSliceH / 2,
srcStride[1], srcStride[2], dstStride[0]);
else
interleaveBytes(src[2], src[1], dst, c->srcW / 2, srcSliceH / 2,
srcStride[2], srcStride[1], dstStride[0]);
return srcSliceH;
}
static int planarToYuy2Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
srcStride[1], dstStride[0]);
return srcSliceH;
}
static int planarToUyvyWrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
srcStride[1], dstStride[0]);
return srcSliceH;
}
static int yuv422pToYuy2Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
yuv422ptoyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
srcStride[1], dstStride[0]);
return srcSliceH;
}
static int yuv422pToUyvyWrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *dst = dstParam[0] + dstStride[0] * srcSliceY;
yuv422ptouyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0],
srcStride[1], dstStride[0]);
return srcSliceH;
}
static int yuyvToYuv420Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY / 2;
uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY / 2;
yuyvtoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
dstStride[1], srcStride[0]);
if (dstParam[3])
fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
return srcSliceH;
}
static int yuyvToYuv422Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY;
uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY;
yuyvtoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
dstStride[1], srcStride[0]);
return srcSliceH;
}
static int uyvyToYuv420Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY / 2;
uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY / 2;
uyvytoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
dstStride[1], srcStride[0]);
if (dstParam[3])
fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
return srcSliceH;
}
static int uyvyToYuv422Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dstParam[], int dstStride[])
{
uint8_t *ydst = dstParam[0] + dstStride[0] * srcSliceY;
uint8_t *udst = dstParam[1] + dstStride[1] * srcSliceY;
uint8_t *vdst = dstParam[2] + dstStride[2] * srcSliceY;
uyvytoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0],
dstStride[1], srcStride[0]);
return srcSliceH;
}
static void gray8aToPacked32(const uint8_t *src, uint8_t *dst, int num_pixels,
const uint8_t *palette)
{
int i;
for (i = 0; i < num_pixels; i++)
((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i << 1]] | (src[(i << 1) + 1] << 24);
}
static void gray8aToPacked32_1(const uint8_t *src, uint8_t *dst, int num_pixels,
const uint8_t *palette)
{
int i;
for (i = 0; i < num_pixels; i++)
((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i << 1]] | src[(i << 1) + 1];
}
static void gray8aToPacked24(const uint8_t *src, uint8_t *dst, int num_pixels,
const uint8_t *palette)
{
int i;
for (i = 0; i < num_pixels; i++) {
//FIXME slow?
dst[0] = palette[src[i << 1] * 4 + 0];
dst[1] = palette[src[i << 1] * 4 + 1];
dst[2] = palette[src[i << 1] * 4 + 2];
dst += 3;
}
}
static int packed_16bpc_bswap(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dst[], int dstStride[])
{
int i, j;
int srcstr = srcStride[0] >> 1;
int dststr = dstStride[0] >> 1;
uint16_t *dstPtr = (uint16_t *) dst[0];
const uint16_t *srcPtr = (const uint16_t *) src[0];
int min_stride = FFMIN(srcstr, dststr);
for (i = 0; i < srcSliceH; i++) {
for (j = 0; j < min_stride; j++) {
dstPtr[j] = av_bswap16(srcPtr[j]);
}
srcPtr += srcstr;
dstPtr += dststr;
}
return srcSliceH;
}
static int palToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
int srcSliceY, int srcSliceH, uint8_t *dst[],
int dstStride[])
{
const enum AVPixelFormat srcFormat = c->srcFormat;
const enum AVPixelFormat dstFormat = c->dstFormat;
void (*conv)(const uint8_t *src, uint8_t *dst, int num_pixels,
const uint8_t *palette) = NULL;
int i;
uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
const uint8_t *srcPtr = src[0];
if (srcFormat == AV_PIX_FMT_GRAY8A) {
switch (dstFormat) {
case AV_PIX_FMT_RGB32 : conv = gray8aToPacked32; break;
case AV_PIX_FMT_BGR32 : conv = gray8aToPacked32; break;
case AV_PIX_FMT_BGR32_1: conv = gray8aToPacked32_1; break;
case AV_PIX_FMT_RGB32_1: conv = gray8aToPacked32_1; break;
case AV_PIX_FMT_RGB24 : conv = gray8aToPacked24; break;
case AV_PIX_FMT_BGR24 : conv = gray8aToPacked24; break;
}
} else if (usePal(srcFormat)) {
switch (dstFormat) {
case AV_PIX_FMT_RGB32 : conv = sws_convertPalette8ToPacked32; break;
case AV_PIX_FMT_BGR32 : conv = sws_convertPalette8ToPacked32; break;
case AV_PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;
case AV_PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;
case AV_PIX_FMT_RGB24 : conv = sws_convertPalette8ToPacked24; break;
case AV_PIX_FMT_BGR24 : conv = sws_convertPalette8ToPacked24; break;
}
}
if (!conv)
av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
else {
for (i = 0; i < srcSliceH; i++) {
conv(srcPtr, dstPtr, c->srcW, (uint8_t *) c->pal_rgb);
srcPtr += srcStride[0];
dstPtr += dstStride[0];
}
}
return srcSliceH;
}
static void gbr24ptopacked24(const uint8_t *src[], int srcStride[],
uint8_t *dst, int dstStride, int srcSliceH,
int width)
{
int x, h, i;
for (h = 0; h < srcSliceH; h++) {
uint8_t *dest = dst + dstStride * h;
for (x = 0; x < width; x++) {
*dest++ = src[0][x];
*dest++ = src[1][x];
*dest++ = src[2][x];
}
for (i = 0; i < 3; i++)
src[i] += srcStride[i];
}
}
static void gbr24ptopacked32(const uint8_t *src[], int srcStride[],
uint8_t *dst, int dstStride, int srcSliceH,
int alpha_first, int width)
{
int x, h, i;
for (h = 0; h < srcSliceH; h++) {
uint8_t *dest = dst + dstStride * h;
if (alpha_first) {
for (x = 0; x < width; x++) {
*dest++ = 0xff;
*dest++ = src[0][x];
*dest++ = src[1][x];
*dest++ = src[2][x];
}
} else {
for (x = 0; x < width; x++) {
*dest++ = src[0][x];
*dest++ = src[1][x];
*dest++ = src[2][x];
*dest++ = 0xff;
}
}
for (i = 0; i < 3; i++)
src[i] += srcStride[i];
}
}
static int planarRgbToRgbWrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dst[], int dstStride[])
{
int alpha_first = 0;
const uint8_t *src102[] = { src[1], src[0], src[2] };
const uint8_t *src201[] = { src[2], src[0], src[1] };
int stride102[] = { srcStride[1], srcStride[0], srcStride[2] };
int stride201[] = { srcStride[2], srcStride[0], srcStride[1] };
if (c->srcFormat != AV_PIX_FMT_GBRP) {
av_log(c, AV_LOG_ERROR, "unsupported planar RGB conversion %s -> %s\n",
av_get_pix_fmt_name(c->srcFormat),
av_get_pix_fmt_name(c->dstFormat));
return srcSliceH;
}
switch (c->dstFormat) {
case AV_PIX_FMT_BGR24:
gbr24ptopacked24(src102, stride102,
dst[0] + srcSliceY * dstStride[0], dstStride[0],
srcSliceH, c->srcW);
break;
case AV_PIX_FMT_RGB24:
gbr24ptopacked24(src201, stride201,
dst[0] + srcSliceY * dstStride[0], dstStride[0],
srcSliceH, c->srcW);
break;
case AV_PIX_FMT_ARGB:
alpha_first = 1;
case AV_PIX_FMT_RGBA:
gbr24ptopacked32(src201, stride201,
dst[0] + srcSliceY * dstStride[0], dstStride[0],
srcSliceH, alpha_first, c->srcW);
break;
case AV_PIX_FMT_ABGR:
alpha_first = 1;
case AV_PIX_FMT_BGRA:
gbr24ptopacked32(src102, stride102,
dst[0] + srcSliceY * dstStride[0], dstStride[0],
srcSliceH, alpha_first, c->srcW);
break;
default:
av_log(c, AV_LOG_ERROR,
"unsupported planar RGB conversion %s -> %s\n",
av_get_pix_fmt_name(c->srcFormat),
av_get_pix_fmt_name(c->dstFormat));
}
return srcSliceH;
}
#define isRGBA32(x) ( \
(x) == AV_PIX_FMT_ARGB \
|| (x) == AV_PIX_FMT_RGBA \
|| (x) == AV_PIX_FMT_BGRA \
|| (x) == AV_PIX_FMT_ABGR \
)
#define isRGBA64(x) ( \
(x) == AV_PIX_FMT_RGBA64LE \
|| (x) == AV_PIX_FMT_RGBA64BE \
|| (x) == AV_PIX_FMT_BGRA64LE \
|| (x) == AV_PIX_FMT_BGRA64BE \
)
#define isRGB48(x) ( \
(x) == AV_PIX_FMT_RGB48LE \
|| (x) == AV_PIX_FMT_RGB48BE \
|| (x) == AV_PIX_FMT_BGR48LE \
|| (x) == AV_PIX_FMT_BGR48BE \
)
/* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
typedef void (* rgbConvFn) (const uint8_t *, uint8_t *, int);
static rgbConvFn findRgbConvFn(SwsContext *c)
{
const enum AVPixelFormat srcFormat = c->srcFormat;
const enum AVPixelFormat dstFormat = c->dstFormat;
const int srcId = c->srcFormatBpp;
const int dstId = c->dstFormatBpp;
rgbConvFn conv = NULL;
#define IS_NOT_NE(bpp, desc) \
(((bpp + 7) >> 3) == 2 && \
(!(desc->flags & PIX_FMT_BE) != !HAVE_BIGENDIAN))
#define CONV_IS(src, dst) (srcFormat == AV_PIX_FMT_##src && dstFormat == AV_PIX_FMT_##dst)
if (isRGBA32(srcFormat) && isRGBA32(dstFormat)) {
if ( CONV_IS(ABGR, RGBA)
|| CONV_IS(ARGB, BGRA)
|| CONV_IS(BGRA, ARGB)
|| CONV_IS(RGBA, ABGR)) conv = shuffle_bytes_3210;
else if (CONV_IS(ABGR, ARGB)
|| CONV_IS(ARGB, ABGR)) conv = shuffle_bytes_0321;
else if (CONV_IS(ABGR, BGRA)
|| CONV_IS(ARGB, RGBA)) conv = shuffle_bytes_1230;
else if (CONV_IS(BGRA, RGBA)
|| CONV_IS(RGBA, BGRA)) conv = shuffle_bytes_2103;
else if (CONV_IS(BGRA, ABGR)
|| CONV_IS(RGBA, ARGB)) conv = shuffle_bytes_3012;
} else if (isRGB48(srcFormat) && isRGB48(dstFormat)) {
if (CONV_IS(RGB48LE, BGR48LE)
|| CONV_IS(BGR48LE, RGB48LE)
|| CONV_IS(RGB48BE, BGR48BE)
|| CONV_IS(BGR48BE, RGB48BE)) conv = rgb48tobgr48_nobswap;
else if (CONV_IS(RGB48LE, BGR48BE)
|| CONV_IS(BGR48LE, RGB48BE)
|| CONV_IS(RGB48BE, BGR48LE)
|| CONV_IS(BGR48BE, RGB48LE)) conv = rgb48tobgr48_bswap;
} else if (isRGBA64(srcFormat) && isRGB48(dstFormat)) {
if (CONV_IS(RGBA64LE, BGR48LE)
|| CONV_IS(BGRA64LE, RGB48LE)
|| CONV_IS(RGBA64BE, BGR48BE)
|| CONV_IS(BGRA64BE, RGB48BE)) conv = rgb64tobgr48_nobswap;
else if (CONV_IS(RGBA64LE, BGR48BE)
|| CONV_IS(BGRA64LE, RGB48BE)
|| CONV_IS(RGBA64BE, BGR48LE)
|| CONV_IS(BGRA64BE, RGB48LE)) conv = rgb64tobgr48_bswap;
else if (CONV_IS(RGBA64LE, RGB48LE)
|| CONV_IS(BGRA64LE, BGR48LE)
|| CONV_IS(RGBA64BE, RGB48BE)
|| CONV_IS(BGRA64BE, BGR48BE)) conv = rgb64to48_nobswap;
else if (CONV_IS(RGBA64LE, RGB48BE)
|| CONV_IS(BGRA64LE, BGR48BE)
|| CONV_IS(RGBA64BE, RGB48LE)
|| CONV_IS(BGRA64BE, BGR48LE)) conv = rgb64to48_bswap;
} else
/* BGR -> BGR */
if ((isBGRinInt(srcFormat) && isBGRinInt(dstFormat)) ||
(isRGBinInt(srcFormat) && isRGBinInt(dstFormat))) {
switch (srcId | (dstId << 16)) {
case 0x000F000C: conv = rgb12to15; break;
case 0x000F0010: conv = rgb16to15; break;
case 0x000F0018: conv = rgb24to15; break;
case 0x000F0020: conv = rgb32to15; break;
case 0x0010000F: conv = rgb15to16; break;
case 0x00100018: conv = rgb24to16; break;
case 0x00100020: conv = rgb32to16; break;
case 0x0018000F: conv = rgb15to24; break;
case 0x00180010: conv = rgb16to24; break;
case 0x00180020: conv = rgb32to24; break;
case 0x0020000F: conv = rgb15to32; break;
case 0x00200010: conv = rgb16to32; break;
case 0x00200018: conv = rgb24to32; break;
}
} else if ((isBGRinInt(srcFormat) && isRGBinInt(dstFormat)) ||
(isRGBinInt(srcFormat) && isBGRinInt(dstFormat))) {
switch (srcId | (dstId << 16)) {
case 0x000C000C: conv = rgb12tobgr12; break;
case 0x000F000F: conv = rgb15tobgr15; break;
case 0x000F0010: conv = rgb16tobgr15; break;
case 0x000F0018: conv = rgb24tobgr15; break;
case 0x000F0020: conv = rgb32tobgr15; break;
case 0x0010000F: conv = rgb15tobgr16; break;
case 0x00100010: conv = rgb16tobgr16; break;
case 0x00100018: conv = rgb24tobgr16; break;
case 0x00100020: conv = rgb32tobgr16; break;
case 0x0018000F: conv = rgb15tobgr24; break;
case 0x00180010: conv = rgb16tobgr24; break;
case 0x00180018: conv = rgb24tobgr24; break;
case 0x00180020: conv = rgb32tobgr24; break;
case 0x0020000F: conv = rgb15tobgr32; break;
case 0x00200010: conv = rgb16tobgr32; break;
case 0x00200018: conv = rgb24tobgr32; break;
}
}
if ((dstFormat == AV_PIX_FMT_RGB32_1 || dstFormat == AV_PIX_FMT_BGR32_1) && !isRGBA32(srcFormat) && ALT32_CORR<0)
return NULL;
return conv;
}
/* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
static int rgbToRgbWrapper(SwsContext *c, const uint8_t *src[], int srcStride[],
int srcSliceY, int srcSliceH, uint8_t *dst[],
int dstStride[])
{
const enum AVPixelFormat srcFormat = c->srcFormat;
const enum AVPixelFormat dstFormat = c->dstFormat;
const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);
const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);
const int srcBpp = (c->srcFormatBpp + 7) >> 3;
const int dstBpp = (c->dstFormatBpp + 7) >> 3;
rgbConvFn conv = findRgbConvFn(c);
if (!conv) {
av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
av_get_pix_fmt_name(srcFormat), av_get_pix_fmt_name(dstFormat));
} else {
const uint8_t *srcPtr = src[0];
uint8_t *dstPtr = dst[0];
int src_bswap = IS_NOT_NE(c->srcFormatBpp, desc_src);
int dst_bswap = IS_NOT_NE(c->dstFormatBpp, desc_dst);
if ((srcFormat == AV_PIX_FMT_RGB32_1 || srcFormat == AV_PIX_FMT_BGR32_1) &&
!isRGBA32(dstFormat))
srcPtr += ALT32_CORR;
if ((dstFormat == AV_PIX_FMT_RGB32_1 || dstFormat == AV_PIX_FMT_BGR32_1) &&
!isRGBA32(srcFormat))
dstPtr += ALT32_CORR;
if (dstStride[0] * srcBpp == srcStride[0] * dstBpp && srcStride[0] > 0 &&
!(srcStride[0] % srcBpp) && !dst_bswap && !src_bswap)
conv(srcPtr, dstPtr + dstStride[0] * srcSliceY,
srcSliceH * srcStride[0]);
else {
int i, j;
dstPtr += dstStride[0] * srcSliceY;
for (i = 0; i < srcSliceH; i++) {
if(src_bswap) {
for(j=0; j<c->srcW; j++)
((uint16_t*)c->formatConvBuffer)[j] = av_bswap16(((uint16_t*)srcPtr)[j]);
conv(c->formatConvBuffer, dstPtr, c->srcW * srcBpp);
}else
conv(srcPtr, dstPtr, c->srcW * srcBpp);
if(dst_bswap)
for(j=0; j<c->srcW; j++)
((uint16_t*)dstPtr)[j] = av_bswap16(((uint16_t*)dstPtr)[j]);
srcPtr += srcStride[0];
dstPtr += dstStride[0];
}
}
}
return srcSliceH;
}
static int bgr24ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dst[], int dstStride[])
{
rgb24toyv12(
src[0],
dst[0] + srcSliceY * dstStride[0],
dst[1] + (srcSliceY >> 1) * dstStride[1],
dst[2] + (srcSliceY >> 1) * dstStride[2],
c->srcW, srcSliceH,
dstStride[0], dstStride[1], srcStride[0]);
if (dst[3])
fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
return srcSliceH;
}
static int yvu9ToYv12Wrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dst[], int dstStride[])
{
copyPlane(src[0], srcStride[0], srcSliceY, srcSliceH, c->srcW,
dst[0], dstStride[0]);
planar2x(src[1], dst[1] + dstStride[1] * (srcSliceY >> 1), c->chrSrcW,
srcSliceH >> 2, srcStride[1], dstStride[1]);
planar2x(src[2], dst[2] + dstStride[2] * (srcSliceY >> 1), c->chrSrcW,
srcSliceH >> 2, srcStride[2], dstStride[2]);
if (dst[3])
fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);
return srcSliceH;
}
/* unscaled copy like stuff (assumes nearly identical formats) */
static int packedCopyWrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dst[], int dstStride[])
{
if (dstStride[0] == srcStride[0] && srcStride[0] > 0)
memcpy(dst[0] + dstStride[0] * srcSliceY, src[0], srcSliceH * dstStride[0]);
else {
int i;
const uint8_t *srcPtr = src[0];
uint8_t *dstPtr = dst[0] + dstStride[0] * srcSliceY;
int length = 0;
/* universal length finder */
while (length + c->srcW <= FFABS(dstStride[0]) &&
length + c->srcW <= FFABS(srcStride[0]))
length += c->srcW;
av_assert1(length != 0);
for (i = 0; i < srcSliceH; i++) {
memcpy(dstPtr, srcPtr, length);
srcPtr += srcStride[0];
dstPtr += dstStride[0];
}
}
return srcSliceH;
}
#define DITHER_COPY(dst, dstStride, src, srcStride, bswap, dbswap)\
uint16_t scale= dither_scale[dst_depth-1][src_depth-1];\
int shift= src_depth-dst_depth + dither_scale[src_depth-2][dst_depth-1];\
for (i = 0; i < height; i++) {\
const uint8_t *dither= dithers[src_depth-9][i&7];\
for (j = 0; j < length-7; j+=8){\
dst[j+0] = dbswap((bswap(src[j+0]) + dither[0])*scale>>shift);\
dst[j+1] = dbswap((bswap(src[j+1]) + dither[1])*scale>>shift);\
dst[j+2] = dbswap((bswap(src[j+2]) + dither[2])*scale>>shift);\
dst[j+3] = dbswap((bswap(src[j+3]) + dither[3])*scale>>shift);\
dst[j+4] = dbswap((bswap(src[j+4]) + dither[4])*scale>>shift);\
dst[j+5] = dbswap((bswap(src[j+5]) + dither[5])*scale>>shift);\
dst[j+6] = dbswap((bswap(src[j+6]) + dither[6])*scale>>shift);\
dst[j+7] = dbswap((bswap(src[j+7]) + dither[7])*scale>>shift);\
}\
for (; j < length; j++)\
dst[j] = dbswap((bswap(src[j]) + dither[j&7])*scale>>shift);\
dst += dstStride;\
src += srcStride;\
}
static int planarCopyWrapper(SwsContext *c, const uint8_t *src[],
int srcStride[], int srcSliceY, int srcSliceH,
uint8_t *dst[], int dstStride[])
{
const AVPixFmtDescriptor *desc_src = av_pix_fmt_desc_get(c->srcFormat);
const AVPixFmtDescriptor *desc_dst = av_pix_fmt_desc_get(c->dstFormat);
int plane, i, j;
for (plane = 0; plane < 4; plane++) {
int length = (plane == 0 || plane == 3) ? c->srcW : -((-c->srcW ) >> c->chrDstHSubSample);
int y = (plane == 0 || plane == 3) ? srcSliceY: -((-srcSliceY) >> c->chrDstVSubSample);
int height = (plane == 0 || plane == 3) ? srcSliceH: -((-srcSliceH) >> c->chrDstVSubSample);
const uint8_t *srcPtr = src[plane];
uint8_t *dstPtr = dst[plane] + dstStride[plane] * y;
int shiftonly= plane==1 || plane==2 || (!c->srcRange && plane==0);
if (!dst[plane])
continue;
// ignore palette for GRAY8
if (plane == 1 && !dst[2]) continue;
if (!src[plane] || (plane == 1 && !src[2])) {
if (is16BPS(c->dstFormat) || isNBPS(c->dstFormat)) {
fillPlane16(dst[plane], dstStride[plane], length, height, y,
plane == 3, desc_dst->comp[plane].depth_minus1,
isBE(c->dstFormat));
} else {
fillPlane(dst[plane], dstStride[plane], length, height, y,
(plane == 3) ? 255 : 128);
}
} else {
if(isNBPS(c->srcFormat) || isNBPS(c->dstFormat)
|| (is16BPS(c->srcFormat) != is16BPS(c->dstFormat))
) {
const int src_depth = desc_src->comp[plane].depth_minus1 + 1;
const int dst_depth = desc_dst->comp[plane].depth_minus1 + 1;
const uint16_t *srcPtr2 = (const uint16_t *) srcPtr;
uint16_t *dstPtr2 = (uint16_t*)dstPtr;
if (dst_depth == 8) {
if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, , )
} else {
DITHER_COPY(dstPtr, dstStride[plane], srcPtr2, srcStride[plane]/2, av_bswap16, )
}
} else if (src_depth == 8) {
for (i = 0; i < height; i++) {
#define COPY816(w)\
if(shiftonly){\
for (j = 0; j < length; j++)\
w(&dstPtr2[j], srcPtr[j]<<(dst_depth-8));\
}else{\
for (j = 0; j < length; j++)\
w(&dstPtr2[j], (srcPtr[j]<<(dst_depth-8)) |\
(srcPtr[j]>>(2*8-dst_depth)));\
}
if(isBE(c->dstFormat)){
COPY816(AV_WB16)
} else {
COPY816(AV_WL16)
}
dstPtr2 += dstStride[plane]/2;
srcPtr += srcStride[plane];
}
} else if (src_depth <= dst_depth) {
int orig_length = length;
for (i = 0; i < height; i++) {
if(isBE(c->srcFormat) == HAVE_BIGENDIAN &&
isBE(c->dstFormat) == HAVE_BIGENDIAN &&
shiftonly) {
unsigned shift = dst_depth - src_depth;
length = orig_length;
#if HAVE_FAST_64BIT
#define FAST_COPY_UP(shift) \
for (j = 0; j < length - 3; j += 4) { \
uint64_t v = AV_RN64A(srcPtr2 + j); \
AV_WN64A(dstPtr2 + j, v << shift); \
} \
length &= 3;
#else
#define FAST_COPY_UP(shift) \
for (j = 0; j < length - 1; j += 2) { \
uint32_t v = AV_RN32A(srcPtr2 + j); \
AV_WN32A(dstPtr2 + j, v << shift); \
} \
length &= 1;
#endif
switch (shift)
{
case 6: FAST_COPY_UP(6); break;
case 7: FAST_COPY_UP(7); break;
}
}
#define COPY_UP(r,w) \
if(shiftonly){\
for (j = 0; j < length; j++){ \
unsigned int v= r(&srcPtr2[j]);\
w(&dstPtr2[j], v<<(dst_depth-src_depth));\
}\
}else{\
for (j = 0; j < length; j++){ \
unsigned int v= r(&srcPtr2[j]);\
w(&dstPtr2[j], (v<<(dst_depth-src_depth)) | \
(v>>(2*src_depth-dst_depth)));\
}\
}
if(isBE(c->srcFormat)){
if(isBE(c->dstFormat)){
COPY_UP(AV_RB16, AV_WB16)
} else {
COPY_UP(AV_RB16, AV_WL16)
}
} else {
if(isBE(c->dstFormat)){
COPY_UP(AV_RL16, AV_WB16)
} else {
COPY_UP(AV_RL16, AV_WL16)
}
}
dstPtr2 += dstStride[plane]/2;
srcPtr2 += srcStride[plane]/2;
}
} else {
if(isBE(c->srcFormat) == HAVE_BIGENDIAN){
if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , )
} else {
DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, , av_bswap16)
}
}else{
if(isBE(c->dstFormat) == HAVE_BIGENDIAN){
DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, )
} else {
DITHER_COPY(dstPtr2, dstStride[plane]/2, srcPtr2, srcStride[plane]/2, av_bswap16, av_bswap16)
}
}
}
} else if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat) &&
isBE(c->srcFormat) != isBE(c->dstFormat)) {
for (i = 0; i < height; i++) {
for (j = 0; j < length; j++)
((uint16_t *) dstPtr)[j] = av_bswap16(((const uint16_t *) srcPtr)[j]);
srcPtr += srcStride[plane];
dstPtr += dstStride[plane];
}
} else if (dstStride[plane] == srcStride[plane] &&
srcStride[plane] > 0 && srcStride[plane] == length) {
memcpy(dst[plane] + dstStride[plane] * y, src[plane],
height * dstStride[plane]);
} else {
if (is16BPS(c->srcFormat) && is16BPS(c->dstFormat))
length *= 2;
else if (!desc_src->comp[0].depth_minus1)
length >>= 3; // monowhite/black
for (i = 0; i < height; i++) {
memcpy(dstPtr, srcPtr, length);
srcPtr += srcStride[plane];
dstPtr += dstStride[plane];
}
}
}
}
return srcSliceH;
}
#define IS_DIFFERENT_ENDIANESS(src_fmt, dst_fmt, pix_fmt) \
((src_fmt == pix_fmt ## BE && dst_fmt == pix_fmt ## LE) || \
(src_fmt == pix_fmt ## LE && dst_fmt == pix_fmt ## BE))
void ff_get_unscaled_swscale(SwsContext *c)
{
const enum AVPixelFormat srcFormat = c->srcFormat;
const enum AVPixelFormat dstFormat = c->dstFormat;
const int flags = c->flags;
const int dstH = c->dstH;
int needsDither;
needsDither = isAnyRGB(dstFormat) &&
c->dstFormatBpp < 24 &&
(c->dstFormatBpp < c->srcFormatBpp || (!isAnyRGB(srcFormat)));
/* yv12_to_nv12 */
if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) &&
(dstFormat == AV_PIX_FMT_NV12 || dstFormat == AV_PIX_FMT_NV21)) {
c->swScale = planarToNv12Wrapper;
}
/* yuv2bgr */
if ((srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUV422P ||
srcFormat == AV_PIX_FMT_YUVA420P) && isAnyRGB(dstFormat) &&
!(flags & (SWS_ACCURATE_RND|SWS_ERROR_DIFFUSION)) && !(dstH & 1)) {
c->swScale = ff_yuv2rgb_get_func_ptr(c);
}
if (srcFormat == AV_PIX_FMT_YUV410P &&
(dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&
!(flags & SWS_BITEXACT)) {
c->swScale = yvu9ToYv12Wrapper;
}
/* bgr24toYV12 */
if (srcFormat == AV_PIX_FMT_BGR24 &&
(dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P) &&
!(flags & SWS_ACCURATE_RND))
c->swScale = bgr24ToYv12Wrapper;
/* RGB/BGR -> RGB/BGR (no dither needed forms) */
if (isAnyRGB(srcFormat) && isAnyRGB(dstFormat) && findRgbConvFn(c)
&& (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))
c->swScale= rgbToRgbWrapper;
#define isByteRGB(f) ( \
f == AV_PIX_FMT_RGB32 || \
f == AV_PIX_FMT_RGB32_1 || \
f == AV_PIX_FMT_RGB24 || \
f == AV_PIX_FMT_BGR32 || \
f == AV_PIX_FMT_BGR32_1 || \
f == AV_PIX_FMT_BGR24)
if (srcFormat == AV_PIX_FMT_GBRP && isPlanar(srcFormat) && isByteRGB(dstFormat))
c->swScale = planarRgbToRgbWrapper;
/* bswap 16 bits per pixel/component packed formats */
if (IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR444) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR48) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGRA64) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR555) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_BGR565) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_GRAY16) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB444) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB48) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGBA64) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB555) ||
IS_DIFFERENT_ENDIANESS(srcFormat, dstFormat, AV_PIX_FMT_RGB565))
c->swScale = packed_16bpc_bswap;
if (usePal(srcFormat) && isByteRGB(dstFormat))
c->swScale = palToRgbWrapper;
if (srcFormat == AV_PIX_FMT_YUV422P) {
if (dstFormat == AV_PIX_FMT_YUYV422)
c->swScale = yuv422pToYuy2Wrapper;
else if (dstFormat == AV_PIX_FMT_UYVY422)
c->swScale = yuv422pToUyvyWrapper;
}
/* LQ converters if -sws 0 or -sws 4*/
if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {
/* yv12_to_yuy2 */
if (srcFormat == AV_PIX_FMT_YUV420P || srcFormat == AV_PIX_FMT_YUVA420P) {
if (dstFormat == AV_PIX_FMT_YUYV422)
c->swScale = planarToYuy2Wrapper;
else if (dstFormat == AV_PIX_FMT_UYVY422)
c->swScale = planarToUyvyWrapper;
}
}
if (srcFormat == AV_PIX_FMT_YUYV422 &&
(dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))
c->swScale = yuyvToYuv420Wrapper;
if (srcFormat == AV_PIX_FMT_UYVY422 &&
(dstFormat == AV_PIX_FMT_YUV420P || dstFormat == AV_PIX_FMT_YUVA420P))
c->swScale = uyvyToYuv420Wrapper;
if (srcFormat == AV_PIX_FMT_YUYV422 && dstFormat == AV_PIX_FMT_YUV422P)
c->swScale = yuyvToYuv422Wrapper;
if (srcFormat == AV_PIX_FMT_UYVY422 && dstFormat == AV_PIX_FMT_YUV422P)
c->swScale = uyvyToYuv422Wrapper;
#define isPlanarGray(x) (isGray(x) && (x) != AV_PIX_FMT_GRAY8A)
/* simple copy */
if ( srcFormat == dstFormat ||
(srcFormat == AV_PIX_FMT_YUVA420P && dstFormat == AV_PIX_FMT_YUV420P) ||
(srcFormat == AV_PIX_FMT_YUV420P && dstFormat == AV_PIX_FMT_YUVA420P) ||
(isPlanarYUV(srcFormat) && isPlanarGray(dstFormat)) ||
(isPlanarYUV(dstFormat) && isPlanarGray(srcFormat)) ||
(isPlanarGray(dstFormat) && isPlanarGray(srcFormat)) ||
(isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat) &&
c->chrDstHSubSample == c->chrSrcHSubSample &&
c->chrDstVSubSample == c->chrSrcVSubSample &&
dstFormat != AV_PIX_FMT_NV12 && dstFormat != AV_PIX_FMT_NV21 &&
srcFormat != AV_PIX_FMT_NV12 && srcFormat != AV_PIX_FMT_NV21))
{
if (isPacked(c->srcFormat))
c->swScale = packedCopyWrapper;
else /* Planar YUV or gray */
c->swScale = planarCopyWrapper;
}
if (ARCH_BFIN)
ff_bfin_get_unscaled_swscale(c);
if (HAVE_ALTIVEC)
ff_swscale_get_unscaled_altivec(c);
}
/* Convert the palette to the same packed 32-bit format as the palette */
void sws_convertPalette8ToPacked32(const uint8_t *src, uint8_t *dst,
int num_pixels, const uint8_t *palette)
{
int i;
for (i = 0; i < num_pixels; i++)
((uint32_t *) dst)[i] = ((const uint32_t *) palette)[src[i]];
}
/* Palette format: ABCD -> dst format: ABC */
void sws_convertPalette8ToPacked24(const uint8_t *src, uint8_t *dst,
int num_pixels, const uint8_t *palette)
{
int i;
for (i = 0; i < num_pixels; i++) {
//FIXME slow?
dst[0] = palette[src[i] * 4 + 0];
dst[1] = palette[src[i] * 4 + 1];
dst[2] = palette[src[i] * 4 + 2];
dst += 3;
}
}
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