diff options
Diffstat (limited to 'gem2pdp/yuv.c')
| -rw-r--r-- | gem2pdp/yuv.c | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/gem2pdp/yuv.c b/gem2pdp/yuv.c deleted file mode 100644 index 4e6cd69..0000000 --- a/gem2pdp/yuv.c +++ /dev/null @@ -1,201 +0,0 @@ -/* - * EffecTV - Realtime Digital Video Effector - * Copyright (C) 2001-2002 FUKUCHI Kentaro - * - * yuv.c: YUV(YCbCr) color system utilities - * - */ - -#include <math.h> -#include "m_pd.h" - -/* - * conversion from YUV to RGB - * r = 1.164*(y-16) + 1.596*(v-128); - * g = 1.164*(y-16) - 0.813*(v-128) - 0.391*(u-128); - * b = 1.164*(y-16) + 2.018*(u-128); - * conversion from RGB to YUV - * y = 0.257*r + 0.504*g + 0.098*b + 16 - * u = -0.148*r - 0.291*g + 0.439*b + 128 - * v = 0.439*r - 0.368*g - 0.071*b + 128 - */ - -float YtoRGB[256]; -float VtoR[256], VtoG[256]; -float UtoG[256], UtoB[256]; -float RtoY[256], RtoU[256], RtoV[256]; -float GtoY[256], GtoU[256], GtoV[256]; -float BtoY[256], BtoV[256]; - -static int yuvinit=-1; - -int yuv_init(void) -{ - int i; - - if(yuvinit==-1) { - for(i=0; i<256; i++) { - YtoRGB[i] = 1.164*(i-16); - VtoR[i] = 1.596*(i-128); - VtoG[i] = -0.813*(i-128); - UtoG[i] = -0.391*(i-128); - UtoB[i] = 2.018*(i-128); - RtoY[i] = 0.257*i; - RtoU[i] = -0.148*i; - RtoV[i] = 0.439*i; - GtoY[i] = 0.504*i; - GtoU[i] = -0.291*i; - GtoV[i] = -0.368*i; - BtoY[i] = 0.098*i; - BtoV[i] = -0.071*i; - } - yuvinit=1; - } - - return 0; -} - -unsigned char yuv_RGBtoY(int rgb) -{ - int i; - - if ( yuvinit == -1 ) { yuv_init(); } - i = RtoY[(rgb>>16)&0xff]; - i += GtoY[(rgb>>8)&0xff]; - i += BtoY[rgb&0xff]; - i += 16; - - return i; -} - -unsigned char yuv_RGBtoU(int rgb) -{ - int i; - - if ( yuvinit == -1 ) { yuv_init(); } - i = RtoU[(rgb>>16)&0xff]; - i += GtoU[(rgb>>8)&0xff]; - i += RtoV[rgb&0xff];/* BtoU == RtoV */ - i += 128; - - return i; -} - -unsigned char yuv_RGBtoV(int rgb) -{ - int i; - - if ( yuvinit == -1 ) { yuv_init(); } - i = RtoV[(rgb>>16)&0xff]; - i += GtoV[(rgb>>8)&0xff]; - i += BtoV[rgb&0xff]; - i += 128; - - return i; -} - -unsigned char yuv_YUVtoR(unsigned char y, unsigned char u, unsigned char v) -{ - int r; - - if ( yuvinit == -1 ) { yuv_init(); } - r = YtoRGB[(int)y] + VtoR[(int)v]; - if ( r>255 ) r=255; - if ( r<0 ) r=0; - return r; -} - -unsigned char yuv_YUVtoG(unsigned char y, unsigned char u, unsigned char v) -{ - int g; - - if ( yuvinit == -1 ) { yuv_init(); } - g = YtoRGB[(int)y] + UtoG[(int)u] + VtoG[(int)v]; - if ( g>255 ) g=255; - if ( g<0 ) g=0; - return g; -} - -unsigned char yuv_YUVtoB(unsigned char y, unsigned char u, unsigned char v) -{ - int b; - - if ( yuvinit == -1 ) { yuv_init(); } - b = YtoRGB[(int)y] + UtoB[(int)u]; - if ( b>255 ) b=255; - if ( b<0 ) b=0; - return b; -} - -int yuv_YUVtoRGB(unsigned char y, unsigned char u, unsigned char v) -{ - if ( yuvinit == -1 ) { yuv_init(); } - return ( (yuv_YUVtoR(y,u,v)<<16) + (yuv_YUVtoG(y,u,v)<<8) + (yuv_YUVtoB(y,u,v)) ); -} - -void yuv_Y122RGB( short int* packet, unsigned int *rgb, int width, int height ) -{ - unsigned char y=0,u=0,v=0; - int X,Y; - int uoffset = width*height; - int maxoffset = width*height+((width*height)>>1); - int voffset = width*height+((width*height)>>2); - - if ( !packet || !rgb ) - { - post( "yuv_Y122RGB : pointers are NULL !!!" ); - return; - } - if ( yuvinit == -1 ) { yuv_init(); } - for(Y=0; Y < height; Y++){ - for(X=0; X < width; X++){ - // post( "yuv_Y122RGB : X=%d Y=%d", X, Y ); - if ( (Y*width+X) < maxoffset ) - y=(packet[Y*width+X]>>7); - if( (uoffset+((Y>>1)*width+(X>>1))) < maxoffset ) - u=(packet[uoffset+((Y>>1)*width+(X>>1))]>>8)+128; - if( (voffset+((Y>>1)*width+(X>>1))) < maxoffset ) - v=(packet[voffset+((Y>>1)*width+(X>>1))]>>8)+128; - - rgb[Y*width+X] = yuv_YUVtoRGB( y, u, v ); - } - } - -} - -void yuv_RGB2Y12( unsigned int *rgb, short int* packet, int width, int height ) -{ - short int y,u,v,iu=0,iv=0; - int X,Y; - int uoffset = width*height; - int maxoffset = width*height+((width*height)>>1); - int voffset = width*height+((width*height)>>2); - - if ( !packet || !rgb ) - { - post( "yuv_RGB2Y12 : pointers are NULL !!!" ); - return; - } - if ( yuvinit == -1 ) { yuv_init(); }; - for(Y=0; Y < height; Y++) - for(X=0; X < width; X++){ - { - // post( "yuv_RGB2Y12 : X=%d Y=%d", X, Y ); - y=yuv_RGBtoY( rgb[Y*width+X] ); - u=yuv_RGBtoU( rgb[Y*width+X] ); - v=yuv_RGBtoV( rgb[Y*width+X] ); - - if ( (Y*width+X) < maxoffset ) - packet[Y*width+X]=(y<<7); - if( (uoffset+iu) < maxoffset ) - packet[uoffset+iu]=(u-128<<8); - if( (voffset+iv) < maxoffset ) - packet[voffset+iv]=(v-128<<8); - if ( ( X%2 == 0) && ( Y%2 == 0) ) - { - iu++; iv++; - } - } - } - -} |