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Add a new unscaled PAL8 -> RGB converter. 

Originally committed as revision 27730 to svn://svn.mplayerhq.hu/mplayer/trunk/libswscale
This commit is contained in:
Vitor Sessak 2008-10-08 17:46:22 +00:00
parent fd2b356a62
commit 4900461742
2 changed files with 55 additions and 10 deletions
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62
libswscale/swscale.c
View File

@ -155,6 +155,13 @@ unsigned swscale_version(void)
|| isRGB(x) \
|| isBGR(x) \
)
#define usePal(x) ( \
(x)==PIX_FMT_PAL8 \
|| (x)==PIX_FMT_BGR4_BYTE \
|| (x)==PIX_FMT_RGB4_BYTE \
|| (x)==PIX_FMT_BGR8 \
|| (x)==PIX_FMT_RGB8 \
)
#define RGB2YUV_SHIFT 15
#define BY ( (int)(0.114*219/255*(1<<RGB2YUV_SHIFT)+0.5))
@ -1707,6 +1714,39 @@ static int YUV422PToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[],
return srcSliceH;
}
static int pal2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
int srcSliceH, uint8_t* dst[], int dstStride[]){
const int srcFormat= c->srcFormat;
const int dstFormat= c->dstFormat;
void (*conv)(const uint8_t *src, uint8_t *dst, long num_pixels,
const uint8_t *palette)=NULL;
int i;
uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
uint8_t *srcPtr= src[0];
if (!usePal(srcFormat))
av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
sws_format_name(srcFormat), sws_format_name(dstFormat));
switch(dstFormat){
case PIX_FMT_RGB32: conv = palette8torgb32; break;
case PIX_FMT_BGR32: conv = palette8tobgr32; break;
case PIX_FMT_RGB24: conv = palette8torgb24; break;
case PIX_FMT_BGR24: conv = palette8tobgr24; break;
default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",
sws_format_name(srcFormat), sws_format_name(dstFormat)); break;
}
for (i=0; i<srcSliceH; i++) {
conv(srcPtr, dstPtr, c->srcW, c->pal_rgb);
srcPtr+= srcStride[0];
dstPtr+= dstStride[0];
}
return srcSliceH;
}
/* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */
static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
int srcSliceH, uint8_t* dst[], int dstStride[]){
@ -2301,6 +2341,13 @@ SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat, int d
&& (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))
c->swScale= rgb2rgbWrapper;
if ((usePal(srcFormat) && (
dstFormat == PIX_FMT_RGB32 ||
dstFormat == PIX_FMT_RGB24 ||
dstFormat == PIX_FMT_BGR32 ||
dstFormat == PIX_FMT_BGR24)))
c->swScale= pal2rgbWrapper;
if (srcFormat == PIX_FMT_YUV422P)
{
if (dstFormat == PIX_FMT_YUYV422)
@ -2654,12 +2701,6 @@ int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
int srcSliceH, uint8_t* dst[], int dstStride[]){
int i;
uint8_t* src2[4]= {src[0], src[1], src[2]};
uint32_t pal[256];
int use_pal= c->srcFormat == PIX_FMT_PAL8
|| c->srcFormat == PIX_FMT_BGR4_BYTE
|| c->srcFormat == PIX_FMT_RGB4_BYTE
|| c->srcFormat == PIX_FMT_BGR8
|| c->srcFormat == PIX_FMT_RGB8;
if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");
@ -2669,7 +2710,7 @@ int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
}
if (use_pal){
if (usePal(c->srcFormat)){
for (i=0; i<256; i++){
int p, r, g, b,y,u,v;
if(c->srcFormat == PIX_FMT_PAL8){
@ -2697,9 +2738,10 @@ int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
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);
pal[i]= y + (u<<8) + (v<<16);
c->pal_yuv[i]= y + (u<<8) + (v<<16);
c->pal_rgb[i]= b + (g<<8) + (r<<16);
}
src2[1]= (uint8_t*)pal;
src2[1]= (uint8_t*)c->pal_yuv;
}
// copy strides, so they can safely be modified
@ -2717,7 +2759,7 @@ int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2]};
src2[0] += (srcSliceH-1)*srcStride[0];
if (!use_pal)
if (!usePal(c->srcFormat))
src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];
src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];

3
libswscale/swscale_internal.h
View File

@ -80,6 +80,9 @@ typedef struct SwsContext{
int sliceDir;
double param[2];
uint32_t pal_yuv[256];
uint32_t pal_rgb[256];
int16_t **lumPixBuf;
int16_t **chrPixBuf;
int16_t *hLumFilter;