ref: c7d9da8f5a41b833946027c802e0e8d7dd014b22
dir: /sys/src/cmd/python/Modules/yuv.h/
#ifndef Py_YUV_H #define Py_YUV_H #ifdef __cplusplus extern "C" { #endif /* * SVideo YUV 4:1:1 format. * * 4 consecutive quadwords describe 8 pixels on 2 lines, as depicted * below. An array of (width/4) of the below structure describes 2 * scan lines. * * +-------------------+ * | 00 | 01 | 02 | 03 | . . . * +-------------------+ * | 10 | 11 | 12 | 13 | . . . * +-------------------+ */ struct yuv411 { struct { unsigned int dummy:8; unsigned int y0:8; unsigned int u0:2; unsigned int v0:2; unsigned int y1:8; unsigned int u1:2; unsigned int v1:2; } v[4]; }; #define YUV411_Y00(y) (y).v[0].y0 #define YUV411_Y01(y) (y).v[1].y0 #define YUV411_Y02(y) (y).v[2].y0 #define YUV411_Y03(y) (y).v[3].y0 #define YUV411_Y10(y) (y).v[0].y1 #define YUV411_Y11(y) (y).v[1].y1 #define YUV411_Y12(y) (y).v[2].y1 #define YUV411_Y13(y) (y).v[3].y1 #define YUV411_U00(y) ((y).v[0].u0<<6|(y).v[1].u0<<4|(y).v[2].u0<<2|(y).v[3].u0) #define YUV411_U01(y) YUV411_U00(y) #define YUV411_U02(y) YUV411_U00(y) #define YUV411_U03(y) YUV411_U00(y) #define YUV411_U10(y) ((y).v[0].u1<<6|(y).v[1].u1<<4|(y).v[2].u1<<2|(y).v[3].u1) #define YUV411_U11(y) YUV411_U10(y) #define YUV411_U12(y) YUV411_U10(y) #define YUV411_U13(y) YUV411_U10(y) #define YUV411_V00(y) ((y).v[0].v0<<6|(y).v[1].v0<<4|(y).v[2].v0<<2|(y).v[3].v0) #define YUV411_V01(y) YUV411_V00(y) #define YUV411_V02(y) YUV411_V00(y) #define YUV411_V03(y) YUV411_V00(y) #define YUV411_V10(y) ((y).v[0].v1<<6|(y).v[1].v1<<4|(y).v[2].v1<<2|(y).v[3].v1) #define YUV411_V11(y) YUV411_V10(y) #define YUV411_V12(y) YUV411_V10(y) #define YUV411_V13(y) YUV411_V10(y) /* * Compression Library YUV 4:2:2 format. * * 1 longword describes 2 pixels. * * +-------+ * | 0 | 1 | * +-------+ */ struct yuv422 { unsigned int u:8; unsigned int y0:8; unsigned int v:8; unsigned int y1:8; }; #define YUV422_Y0(y) (y).y0 #define YUV422_Y1(y) (y).y1 #define YUV422_U0(y) (y).u #define YUV422_U1(y) (y).u #define YUV422_V0(y) (y).v #define YUV422_V1(y) (y).v /* * Compression library YUV 4:2:2 Duplicate Chroma format. * * This is like the previous format, but the U and V values are * duplicated vertically (and hence there is some redundancy in the * data). With other words, lines 2*n and 2*n+1 have the same U and V * values but different Y values. */ /* * Conversion functions. */ void yuv_sv411_to_cl422dc(int, void *, void *, int, int); void yuv_sv411_to_cl422dc_quartersize(int, void *, void *, int, int); void yuv_sv411_to_cl422dc_sixteenthsize(int, void *, void *, int, int); #ifdef __cplusplus } #endif #endif /* !Py_YUV_H */