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brightness / saturation / contrast / different yuv colorspace support for some yuv2rgb converters (many converters still ignore it) 

Originally committed as revision 9417 to svn://svn.mplayerhq.hu/mplayer/trunk/postproc
This commit is contained in:
Michael Niedermayer 2003-02-13 19:27:17 +00:00
parent 6542b44e2a
commit 0481412aba
2 changed files with 56 additions and 10 deletions
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58
postproc/swscale.c
View File

@ -132,6 +132,8 @@ untested special converters
#define RU ((int)(-0.148*(1<<RGB2YUV_SHIFT)+0.5))
extern int verbose; // defined in mplayer.c
extern const int32_t Inverse_Table_6_9[8][4];
/*
NOTES
Special versions: fast Y 1:1 scaling (no interpolation in y direction)
@ -1960,6 +1962,50 @@ static void getSubSampleFactors(int *h, int *v, int format){
}
}
static uint16_t roundToInt16(float f){
if(f<-0x7FFF) f= -0x7FFF;
else if(f> 0x7FFF) f= 0x7FFF;
return (int)floor(f + 0.5);
}
/**
* @param colorspace colorspace
* @param fullRange if 1 then the luma range is 0..255 if 0 its 16..235
*/
void setInputColorspaceDetails(SwsContext *c, int colorspace, int fullRange, float brightness, float contrast, float saturation){
float crv = Inverse_Table_6_9[colorspace][0]/65536.0;
float cbu = Inverse_Table_6_9[colorspace][1]/65536.0;
float cgu = -Inverse_Table_6_9[colorspace][2]/65536.0;
float cgv = -Inverse_Table_6_9[colorspace][3]/65536.0;
float cy = 1.0;
float oy = 0;
c->uOffset= 0x0400040004000400LL;
c->vOffset= 0x0400040004000400LL;
if(!fullRange){
cy= (cy*255.0) / 219.0;
oy= 16.0;
}
cy *= contrast;
crv*= contrast * saturation;
cbu*= contrast * saturation;
cgu*= contrast * saturation;
cgv*= contrast * saturation;
oy -= 256.0*brightness;
c->yCoeff= roundToInt16(cy *8192) * 0x0001000100010001ULL;
c->vrCoeff= roundToInt16(crv*8192) * 0x0001000100010001ULL;
c->ubCoeff= roundToInt16(cbu*8192) * 0x0001000100010001ULL;
c->vgCoeff= roundToInt16(cgv*8192) * 0x0001000100010001ULL;
c->ugCoeff= roundToInt16(cgu*8192) * 0x0001000100010001ULL;
c->yOffset= roundToInt16(oy * 8) * 0x0001000100010001ULL;
}
SwsContext *getSwsContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
SwsFilter *srcFilter, SwsFilter *dstFilter){
@ -2019,15 +2065,8 @@ SwsContext *getSwsContext(int srcW, int srcH, int srcFormat, int dstW, int dstH,
c->dstFormat= dstFormat;
c->srcFormat= srcFormat;
c->yCoeff= 0x2568256825682568LL;
c->vrCoeff= 0x3343334333433343LL;
c->ubCoeff= 0x40cf40cf40cf40cfLL;
c->vgCoeff= 0xE5E2E5E2E5E2E5E2LL;
c->ugCoeff= 0xF36EF36EF36EF36ELL;
c->yOffset= 0x0080008000800080LL;
c->uOffset= 0x0400040004000400LL;
c->vOffset= 0x0400040004000400LL;
setInputColorspaceDetails(c, SWS_CS_DEFAULT, 0, 0.0, 1.0, 1.0);
usesFilter=0;
if(dstFilter->lumV!=NULL && dstFilter->lumV->length>1) usesFilter=1;
if(dstFilter->lumH!=NULL && dstFilter->lumH->length>1) usesFilter=1;
@ -2678,4 +2717,3 @@ void freeSwsContext(SwsContext *c){
free(c);
}

8
postproc/swscale.h
View File

@ -48,6 +48,14 @@
#define SWS_MAX_REDUCE_CUTOFF 0.002
#define SWS_CS_ITU709 1
#define SWS_CS_FCC 4
#define SWS_CS_ITU601 5
#define SWS_CS_ITU624 5
#define SWS_CS_SMPTE170M 5
#define SWS_CS_SMPTE240M 7
#define SWS_CS_DEFAULT 5
/* this struct should be aligned on at least 32-byte boundary */
typedef struct SwsContext{
int srcW, srcH, dstH;