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FFmpeg/libswscale/swscale_unscaled.c

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/*
* Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <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 "libavutil/avutil.h"
#include "libavutil/mathematics.h"
#include "libavutil/bswap.h"
#include "libavutil/pixdesc.h"
#define RGB2YUV_SHIFT 15
#define BY ( (int)(0.114*219/255*(1<<RGB2YUV_SHIFT)+0.5))
#define BV (-(int)(0.081*224/255*(1<<RGB2YUV_SHIFT)+0.5))
#define BU ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))
#define GY ( (int)(0.587*219/255*(1<<RGB2YUV_SHIFT)+0.5))
#define GV (-(int)(0.419*224/255*(1<<RGB2YUV_SHIFT)+0.5))
#define GU (-(int)(0.331*224/255*(1<<RGB2YUV_SHIFT)+0.5))
#define RY ( (int)(0.299*219/255*(1<<RGB2YUV_SHIFT)+0.5))
#define RV ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))
#define RU (-(int)(0.169*224/255*(1<<RGB2YUV_SHIFT)+0.5))
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 == 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 palToRgbWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,
int srcSliceH, uint8_t* dst[], int dstStride[])
{
const enum PixelFormat srcFormat= c->srcFormat;
const enum PixelFormat 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 == PIX_FMT_GRAY8A) {
switch (dstFormat) {
case PIX_FMT_RGB32 : conv = gray8aToPacked32; break;
case PIX_FMT_BGR32 : conv = gray8aToPacked32; break;
case PIX_FMT_BGR32_1: conv = gray8aToPacked32_1; break;
case PIX_FMT_RGB32_1: conv = gray8aToPacked32_1; break;
case PIX_FMT_RGB24 : conv = gray8aToPacked24; break;
case PIX_FMT_BGR24 : conv = gray8aToPacked24; break;
}
} else if (usePal(srcFormat)) {
switch (dstFormat) {
case PIX_FMT_RGB32 : conv = sws_convertPalette8ToPacked32; break;
case PIX_FMT_BGR32 : conv = sws_convertPalette8ToPacked32; break;
case PIX_FMT_BGR32_1: conv = sws_convertPalette8ToPacked32; break;
case PIX_FMT_RGB32_1: conv = sws_convertPalette8ToPacked32; break;
case PIX_FMT_RGB24 : conv = sws_convertPalette8ToPacked24; break;
case 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;
}
#define isRGBA32(x) ( \
(x) == PIX_FMT_ARGB \
|| (x) == PIX_FMT_RGBA \
|| (x) == PIX_FMT_BGRA \
|| (x) == PIX_FMT_ABGR \
)
/* {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 PixelFormat srcFormat= c->srcFormat;
const enum PixelFormat dstFormat= c->dstFormat;
const int srcBpp= (c->srcFormatBpp + 7) >> 3;
const int dstBpp= (c->dstFormatBpp + 7) >> 3;
const int srcId= c->srcFormatBpp >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */
const int dstId= c->dstFormatBpp >> 2;
void (*conv)(const uint8_t *src, uint8_t *dst, int src_size)=NULL;
#define CONV_IS(src, dst) (srcFormat == PIX_FMT_##src && dstFormat == 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
/* BGR -> BGR */
if ( (isBGRinInt(srcFormat) && isBGRinInt(dstFormat))
|| (isRGBinInt(srcFormat) && isRGBinInt(dstFormat))) {
switch(srcId | (dstId<<4)) {
case 0x34: conv= rgb16to15; break;
case 0x36: conv= rgb24to15; break;
case 0x38: conv= rgb32to15; break;
case 0x43: conv= rgb15to16; break;
case 0x46: conv= rgb24to16; break;
case 0x48: conv= rgb32to16; break;
case 0x63: conv= rgb15to24; break;
case 0x64: conv= rgb16to24; break;
case 0x68: conv= rgb32to24; break;
case 0x83: conv= rgb15to32; break;
case 0x84: conv= rgb16to32; break;
case 0x86: conv= rgb24to32; break;
}
} else if ( (isBGRinInt(srcFormat) && isRGBinInt(dstFormat))
|| (isRGBinInt(srcFormat) && isBGRinInt(dstFormat))) {
switch(srcId | (dstId<<4)) {
case 0x33: conv= rgb15tobgr15; break;
case 0x34: conv= rgb16tobgr15; break;
case 0x36: conv= rgb24tobgr15; break;
case 0x38: conv= rgb32tobgr15; break;
case 0x43: conv= rgb15tobgr16; break;
case 0x44: conv= rgb16tobgr16; break;
case 0x46: conv= rgb24tobgr16; break;
case 0x48: conv= rgb32tobgr16; break;
case 0x63: conv= rgb15tobgr24; break;
case 0x64: conv= rgb16tobgr24; break;
case 0x66: conv= rgb24tobgr24; break;
case 0x68: conv= rgb32tobgr24; break;
case 0x83: conv= rgb15tobgr32; break;
case 0x84: conv= rgb16tobgr32; break;
case 0x86: conv= rgb24tobgr32; 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 {
const uint8_t *srcPtr= src[0];
uint8_t *dstPtr= dst[0];
if ((srcFormat == PIX_FMT_RGB32_1 || srcFormat == PIX_FMT_BGR32_1) && !isRGBA32(dstFormat))
srcPtr += ALT32_CORR;
if ((dstFormat == PIX_FMT_RGB32_1 || dstFormat == PIX_FMT_BGR32_1) && !isRGBA32(srcFormat))
dstPtr += ALT32_CORR;
if (dstStride[0]*srcBpp == srcStride[0]*dstBpp && srcStride[0] > 0 && !(srcStride[0]%srcBpp))
conv(srcPtr, dstPtr + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);
else {
int i;
dstPtr += dstStride[0]*srcSliceY;
for (i=0; i<srcSliceH; i++) {
conv(srcPtr, dstPtr, c->srcW*srcBpp);
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;
assert(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[])
{
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;
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))
length*=2;
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 = av_pix_fmt_descriptors[c->srcFormat].comp[plane].depth_minus1+1;
const int dst_depth = av_pix_fmt_descriptors[c->dstFormat].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++) {
if(isBE(c->dstFormat)){
for (j = 0; j < length; j++)
AV_WB16(&dstPtr2[j], (srcPtr[j]<<(dst_depth-8)) |
(srcPtr[j]>>(2*8-dst_depth)));
} else {
for (j = 0; j < length; j++)
AV_WL16(&dstPtr2[j], (srcPtr[j]<<(dst_depth-8)) |
(srcPtr[j]>>(2*8-dst_depth)));
}
dstPtr2 += dstStride[plane]/2;
srcPtr += srcStride[plane];
}
} else if (src_depth <= dst_depth) {
for (i = 0; i < height; i++) {
#define COPY_UP(r,w) \
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;
for (i=0; i<height; i++) {
memcpy(dstPtr, srcPtr, length);
srcPtr+= srcStride[plane];
dstPtr+= dstStride[plane];
}
}
}
}
return srcSliceH;
}
void ff_get_unscaled_swscale(SwsContext *c)
{
const enum PixelFormat srcFormat = c->srcFormat;
const enum PixelFormat 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 == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21)) {
c->swScale= planarToNv12Wrapper;
}
/* yuv2bgr */
if ((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P || srcFormat==PIX_FMT_YUVA420P) && isAnyRGB(dstFormat)
&& !(flags & SWS_ACCURATE_RND) && !(dstH&1)) {
c->swScale= ff_yuv2rgb_get_func_ptr(c);
}
if (srcFormat==PIX_FMT_YUV410P && (dstFormat==PIX_FMT_YUV420P || dstFormat==PIX_FMT_YUVA420P) && !(flags & SWS_BITEXACT)) {
c->swScale= yvu9ToYv12Wrapper;
}
/* bgr24toYV12 */
if (srcFormat==PIX_FMT_BGR24 && (dstFormat==PIX_FMT_YUV420P || dstFormat==PIX_FMT_YUVA420P) && !(flags & SWS_ACCURATE_RND))
c->swScale= bgr24ToYv12Wrapper;
/* RGB/BGR -> RGB/BGR (no dither needed forms) */
if ( isAnyRGB(srcFormat)
&& isAnyRGB(dstFormat)
&& srcFormat != PIX_FMT_BGR8 && dstFormat != PIX_FMT_BGR8
&& srcFormat != PIX_FMT_RGB8 && dstFormat != PIX_FMT_RGB8
&& srcFormat != PIX_FMT_BGR4 && dstFormat != PIX_FMT_BGR4
&& srcFormat != PIX_FMT_RGB4 && dstFormat != PIX_FMT_RGB4
&& srcFormat != PIX_FMT_BGR4_BYTE && dstFormat != PIX_FMT_BGR4_BYTE
&& srcFormat != PIX_FMT_RGB4_BYTE && dstFormat != PIX_FMT_RGB4_BYTE
&& srcFormat != PIX_FMT_MONOBLACK && dstFormat != PIX_FMT_MONOBLACK
&& srcFormat != PIX_FMT_MONOWHITE && dstFormat != PIX_FMT_MONOWHITE
&& srcFormat != PIX_FMT_RGB48LE && dstFormat != PIX_FMT_RGB48LE
&& srcFormat != PIX_FMT_RGB48BE && dstFormat != PIX_FMT_RGB48BE
&& srcFormat != PIX_FMT_BGR48LE && dstFormat != PIX_FMT_BGR48LE
&& srcFormat != PIX_FMT_BGR48BE && dstFormat != PIX_FMT_BGR48BE
&& (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))
c->swScale= rgbToRgbWrapper;
if ((usePal(srcFormat) && (
dstFormat == PIX_FMT_RGB32 ||
dstFormat == PIX_FMT_RGB32_1 ||
dstFormat == PIX_FMT_RGB24 ||
dstFormat == PIX_FMT_BGR32 ||
dstFormat == PIX_FMT_BGR32_1 ||
dstFormat == PIX_FMT_BGR24)))
c->swScale= palToRgbWrapper;
if (srcFormat == PIX_FMT_YUV422P) {
if (dstFormat == PIX_FMT_YUYV422)
c->swScale= yuv422pToYuy2Wrapper;
else if (dstFormat == 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 == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) {
if (dstFormat == PIX_FMT_YUYV422)
c->swScale= planarToYuy2Wrapper;
else if (dstFormat == PIX_FMT_UYVY422)
c->swScale= planarToUyvyWrapper;
}
}
if(srcFormat == PIX_FMT_YUYV422 && (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))
c->swScale= yuyvToYuv420Wrapper;
if(srcFormat == PIX_FMT_UYVY422 && (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))
c->swScale= uyvyToYuv420Wrapper;
if(srcFormat == PIX_FMT_YUYV422 && dstFormat == PIX_FMT_YUV422P)
c->swScale= yuyvToYuv422Wrapper;
if(srcFormat == PIX_FMT_UYVY422 && dstFormat == PIX_FMT_YUV422P)
c->swScale= uyvyToYuv422Wrapper;
/* simple copy */
if ( srcFormat == dstFormat
|| (srcFormat == PIX_FMT_YUVA420P && dstFormat == PIX_FMT_YUV420P)
|| (srcFormat == PIX_FMT_YUV420P && dstFormat == PIX_FMT_YUVA420P)
|| (isPlanarYUV(srcFormat) && isGray(dstFormat))
|| (isPlanarYUV(dstFormat) && isGray(srcFormat))
|| (isGray(dstFormat) && isGray(srcFormat))
|| (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat)
&& c->chrDstHSubSample == c->chrSrcHSubSample
&& c->chrDstVSubSample == c->chrSrcVSubSample
&& dstFormat != PIX_FMT_NV12 && dstFormat != PIX_FMT_NV21
&& srcFormat != PIX_FMT_NV12 && srcFormat != 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);
}
static void reset_ptr(const uint8_t* src[], int format)
{
if(!isALPHA(format))
src[3]=NULL;
if(!isPlanarYUV(format)) {
src[3]=src[2]=NULL;
if (!usePal(format))
src[1]= NULL;
}
}
static int check_image_pointers(uint8_t *data[4], enum PixelFormat pix_fmt,
const int linesizes[4])
{
const AVPixFmtDescriptor *desc = &av_pix_fmt_descriptors[pix_fmt];
int i;
for (i = 0; i < 4; i++) {
int plane = desc->comp[i].plane;
if (!data[plane] || !linesizes[plane])
return 0;
}
return 1;
}
/**
* swscale wrapper, so we don't need to export the SwsContext.
* Assumes planar YUV to be in YUV order instead of YVU.
*/
int sws_scale(struct SwsContext *c, const uint8_t* const srcSlice[],
const int srcStride[], int srcSliceY, int srcSliceH,
uint8_t* const dst[], const int dstStride[])
{
int i;
const uint8_t* src2[4]= {srcSlice[0], srcSlice[1], srcSlice[2], srcSlice[3]};
uint8_t* dst2[4]= {dst[0], dst[1], dst[2], dst[3]};
// do not mess up sliceDir if we have a "trailing" 0-size slice
if (srcSliceH == 0)
return 0;
if (!check_image_pointers(srcSlice, c->srcFormat, srcStride)) {
av_log(c, AV_LOG_ERROR, "bad src image pointers\n");
return 0;
}
if (!check_image_pointers(dst, c->dstFormat, dstStride)) {
av_log(c, AV_LOG_ERROR, "bad dst image pointers\n");
return 0;
}
if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");
return 0;
}
if (c->sliceDir == 0) {
if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
}
if (usePal(c->srcFormat)) {
for (i=0; i<256; i++) {
int p, r, g, b, y, u, v, a = 0xff;
if(c->srcFormat == PIX_FMT_PAL8) {
p=((const uint32_t*)(srcSlice[1]))[i];
a= (p>>24)&0xFF;
r= (p>>16)&0xFF;
g= (p>> 8)&0xFF;
b= p &0xFF;
} else if(c->srcFormat == PIX_FMT_RGB8) {
r= (i>>5 )*36;
g= ((i>>2)&7)*36;
b= (i&3 )*85;
} else if(c->srcFormat == PIX_FMT_BGR8) {
b= (i>>6 )*85;
g= ((i>>3)&7)*36;
r= (i&7 )*36;
} else if(c->srcFormat == PIX_FMT_RGB4_BYTE) {
r= (i>>3 )*255;
g= ((i>>1)&3)*85;
b= (i&1 )*255;
} else if(c->srcFormat == PIX_FMT_GRAY8 || c->srcFormat == PIX_FMT_GRAY8A) {
r = g = b = i;
} else {
assert(c->srcFormat == PIX_FMT_BGR4_BYTE);
b= (i>>3 )*255;
g= ((i>>1)&3)*85;
r= (i&1 )*255;
}
y= av_clip_uint8((RY*r + GY*g + BY*b + ( 33<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
u= av_clip_uint8((RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
v= av_clip_uint8((RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);
c->pal_yuv[i]= y + (u<<8) + (v<<16) + (a<<24);
switch(c->dstFormat) {
case PIX_FMT_BGR32:
#if !HAVE_BIGENDIAN
case PIX_FMT_RGB24:
#endif
c->pal_rgb[i]= r + (g<<8) + (b<<16) + (a<<24);
break;
case PIX_FMT_BGR32_1:
#if HAVE_BIGENDIAN
case PIX_FMT_BGR24:
#endif
c->pal_rgb[i]= a + (r<<8) + (g<<16) + (b<<24);
break;
case PIX_FMT_RGB32_1:
#if HAVE_BIGENDIAN
case PIX_FMT_RGB24:
#endif
c->pal_rgb[i]= a + (b<<8) + (g<<16) + (r<<24);
break;
case PIX_FMT_RGB32:
#if !HAVE_BIGENDIAN
case PIX_FMT_BGR24:
#endif
default:
c->pal_rgb[i]= b + (g<<8) + (r<<16) + (a<<24);
}
}
}
// copy strides, so they can safely be modified
if (c->sliceDir == 1) {
// slices go from top to bottom
int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2], srcStride[3]};
int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2], dstStride[3]};
reset_ptr(src2, c->srcFormat);
reset_ptr((const uint8_t**)dst2, c->dstFormat);
/* reset slice direction at end of frame */
if (srcSliceY + srcSliceH == c->srcH)
c->sliceDir = 0;
return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2, dstStride2);
} else {
// slices go from bottom to top => we flip the image internally
int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2], -srcStride[3]};
int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2], -dstStride[3]};
src2[0] += (srcSliceH-1)*srcStride[0];
if (!usePal(c->srcFormat))
src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];
src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];
src2[3] += (srcSliceH-1)*srcStride[3];
dst2[0] += ( c->dstH -1)*dstStride[0];
dst2[1] += ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1];
dst2[2] += ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2];
dst2[3] += ( c->dstH -1)*dstStride[3];
reset_ptr(src2, c->srcFormat);
reset_ptr((const uint8_t**)dst2, c->dstFormat);
/* reset slice direction at end of frame */
if (!srcSliceY)
c->sliceDir = 0;
return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);
}
}
#if LIBSWSCALE_VERSION_MAJOR < 1
int sws_scale_ordered(SwsContext *c, const uint8_t* const src[], int srcStride[], int srcSliceY,
int srcSliceH, uint8_t* dst[], int dstStride[])
{
return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);
}
#endif
/* 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;
}
}