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