Added conversion routines to sv module.

1 files changed, 87 insertions, 0 deletions

diff --git a/Modules/yuv.h b/Modules/yuv.h
new file mode 100644
index 0000000..6c7b1e2
--- /dev/null
+++ b/Modules/yuv.h
@@ -0,0 +1,87 @@
+/*
+ * 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);