1 files changed, 129 insertions, 0 deletions
diff --git a/hw/xfree86/ddc/interpret_vdif.c b/hw/xfree86/ddc/interpret_vdif.c
new file mode 100644
index 000000000..acd931e70
--- /dev/null
+++ b/hw/xfree86/ddc/interpret_vdif.c
@@ -0,0 +1,129 @@
+/* $XFree86: xc/programs/Xserver/hw/xfree86/ddc/interpret_vdif.c,v 1.6 2000/01/21 02:30:00 dawes Exp $ */
+
+#include "Xarch.h"
+#include "xf86DDC.h"
+#include "vdif.h"
+
+static xf86VdifLimitsPtr* get_limits(CARD8 *c);
+static xf86VdifGammaPtr* get_gamma(CARD8 *c);
+static xf86VdifTimingPtr* get_timings(CARD8 *c);
+#if X_BYTE_ORDER == X_BIG_ENDIAN
+static CARD32 swap_byte_order(CARD32 c);
+#endif
+
+xf86vdifPtr
+xf86InterpretVdif(CARD8 *c)
+{
+    xf86VdifPtr p = (xf86VdifPtr)c;
+    xf86vdifPtr vdif;
+    int i;
+#if X_BYTE_ORDER == X_BIG_ENDIAN
+    int length;
+#endif
+    unsigned long l = 0;
+
+    if (c == NULL) return NULL;
+#if X_BYTE_ORDER == X_BIG_ENDIAN
+    length = swap_byte_order(p->FileLength);
+    for (i = 0; i < (length >>2); i++) 
+	((CARD32*)c)[i] = swap_byte_order(((CARD32*)c)[i]) ;
+#endif  
+    if (p->VDIFId[0] != 'V' || p->VDIFId[1] != 'D' || p->VDIFId[2] != 'I'
+	|| p->VDIFId[3] != 'F') return NULL;
+    for ( i = 12; i < p->FileLength; i++) 
+	l += c[i];
+    if ( l != p->Checksum) return NULL;
+    vdif = xalloc(sizeof(xf86vdif));  
+    vdif->vdif = p;
+    vdif->limits = get_limits(c);
+    vdif->timings = get_timings(c);
+    vdif->gamma = get_gamma(c);
+    vdif->strings = VDIF_STRING(((xf86VdifPtr)c),0);
+    xfree(c);
+    return vdif;
+}
+
+static xf86VdifLimitsPtr*
+get_limits(CARD8 *c)
+{ 
+    int num, i, j;
+    xf86VdifLimitsPtr *pp;
+    xf86VdifLimitsPtr p;
+
+    num = ((xf86VdifPtr)c)->NumberOperationalLimits;
+    pp = xalloc(sizeof(xf86VdifLimitsPtr) * (num+1));
+    p = VDIF_OPERATIONAL_LIMITS(((xf86VdifPtr)c));
+    j = 0;
+    for ( i = 0; i<num; i++) {
+	if (p->Header.ScnTag == VDIF_OPERATIONAL_LIMITS_TAG)
+	    pp[j++] = p;
+	VDIF_NEXT_OPERATIONAL_LIMITS(p);
+    }
+    pp[j] = NULL;
+    return pp;
+}
+
+static xf86VdifGammaPtr*
+get_gamma(CARD8 *c)
+{ 
+    int num, i, j;
+    xf86VdifGammaPtr *pp;
+    xf86VdifGammaPtr p;
+
+    num = ((xf86VdifPtr)c)->NumberOptions;
+    pp = xalloc(sizeof(xf86VdifGammaPtr) * (num+1));
+    p = (xf86VdifGammaPtr)VDIF_OPTIONS(((xf86VdifPtr)c));
+    j = 0;
+    for ( i = 0; i<num; i++)
+    {
+	if (p->Header.ScnTag == VDIF_GAMMA_TABLE_TAG)
+	    pp[j++] = p;
+	VDIF_NEXT_OPTIONS(p);
+    }
+    pp[j] = NULL;
+    return pp;
+}
+
+static xf86VdifTimingPtr*
+get_timings(CARD8 *c)
+{
+    int num, num_limits;
+    int i,j,k;
+    xf86VdifLimitsPtr lp;
+    xf86VdifTimingPtr *pp;
+    xf86VdifTimingPtr p;
+  
+    num = ((xf86VdifPtr)c)->NumberOperationalLimits;
+    lp = VDIF_OPERATIONAL_LIMITS(((xf86VdifPtr)c));
+    num_limits = 0;
+    for (i = 0; i < num; i++) {
+	if (lp->Header.ScnTag == VDIF_OPERATIONAL_LIMITS_TAG)
+	    num_limits += lp->NumberPreadjustedTimings;
+	VDIF_NEXT_OPERATIONAL_LIMITS(lp);
+    }
+    pp = xalloc(sizeof(xf86VdifTimingPtr) 
+				      * (num_limits+1));
+    j = 0;
+    lp = VDIF_OPERATIONAL_LIMITS(((xf86VdifPtr) c));
+    for (i = 0; i < num; i++) {
+	p = VDIF_PREADJUSTED_TIMING(lp);
+	for (k = 0; k < lp->NumberPreadjustedTimings; k++) {
+	    if (p->Header.ScnTag == VDIF_PREADJUSTED_TIMING_TAG)
+		pp[j++] = p;
+	    VDIF_NEXT_PREADJUSTED_TIMING(p);
+	}
+	VDIF_NEXT_OPERATIONAL_LIMITS(lp);
+    }
+    pp[j] = NULL;
+    return pp;
+}
+
+#if X_BYTE_ORDER == X_BIG_ENDIAN
+static CARD32
+swap_byte_order(CARD32 c)
+{
+    return ((c & 0xFF000000) >> 24) | ((c & 0xFF0000) >> 8)
+	| ((c & 0xFF00) << 8) | ((c & 0xFF) << 24);
+}
+
+#endif