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authormarha <marha@users.sourceforge.net>2009-09-15 15:05:16 +0000
committermarha <marha@users.sourceforge.net>2009-09-15 15:05:16 +0000
commit1915b018a54e991c9289ee0c03488294e890caea (patch)
tree0eccc8afdcbcee10f91cfe418fc8c7cdcd4b0163 /xorg-server/hw/xfree86/ddc/edid.c
parent8bfa2f879ea38340a633c29120758a390b63667e (diff)
parent4db64b701ca08687df5932321d48f2ef29b99fed (diff)
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svn merge https://vcxsrv.svn.sourceforge.net/svnroot/vcxsrv/branches/released .
Diffstat (limited to 'xorg-server/hw/xfree86/ddc/edid.c')
-rw-r--r--xorg-server/hw/xfree86/ddc/edid.c140
1 files changed, 0 insertions, 140 deletions
diff --git a/xorg-server/hw/xfree86/ddc/edid.c b/xorg-server/hw/xfree86/ddc/edid.c
deleted file mode 100644
index 3ebafbbba..000000000
--- a/xorg-server/hw/xfree86/ddc/edid.c
+++ /dev/null
@@ -1,140 +0,0 @@
-
-/* edid.c: retrieve EDID record from raw DDC1 data stream: data
- * is contained in an array of unsigned int each unsigned int
- * contains one bit if bit is 0 unsigned int has to be zero else
- * unsigned int > 0
- *
- * Copyright 1998 by Egbert Eich <Egbert.Eich@Physik.TU-Darmstadt.DE>
- */
-#ifdef HAVE_XORG_CONFIG_H
-#include <xorg-config.h>
-#endif
-
-#include "misc.h"
-#include "xf86.h"
-#include "xf86_OSproc.h"
-#include "xf86DDC.h"
-#include "ddcPriv.h"
-#include <string.h>
-
-static int find_start(unsigned int *);
-static unsigned char * find_header(unsigned char *);
-static unsigned char * resort(unsigned char *);
-
-unsigned char *
-GetEDID_DDC1(unsigned int *s_ptr)
-{
- unsigned char *d_block, *d_pos;
- unsigned int *s_pos, *s_end;
- int s_start;
- int i,j;
- s_start = find_start(s_ptr);
- if (s_start==-1) return NULL;
- s_end = s_ptr + NUM;
- s_pos = s_ptr + s_start;
- d_block=xalloc(EDID1_LEN);
- if (!d_block) return NULL;
- d_pos = d_block;
- for (i=0;i<EDID1_LEN;i++) {
- for (j=0;j<8;j++) {
- *d_pos <<= 1;
- if (*s_pos) {
- *d_pos |= 0x01;
- }
- s_pos++; if (s_pos == s_end) s_pos=s_ptr;
- };
- s_pos++; if (s_pos == s_end) s_pos=s_ptr;
- d_pos++;
- }
- xfree(s_ptr);
- if (d_block && DDC_checksum(d_block,EDID1_LEN)) return NULL;
- return (resort(d_block));
-}
-
-int
-DDC_checksum(unsigned char *block, int len)
-{
- int i, result = 0;
- int not_null = 0;
-
- for (i=0;i<len;i++) {
- not_null |= block[i];
- result += block[i];
- }
-
-#ifdef DEBUG
- if (result & 0xFF) ErrorF("DDC checksum not correct\n");
- if (!not_null) ErrorF("DDC read all Null\n");
-#endif
-
- /* catch the trivial case where all bytes are 0 */
- if (!not_null) return 1;
-
- return (result&0xFF);
-}
-
-static int
-find_start(unsigned int *ptr)
-{
- unsigned int comp[9], test[9];
- int i,j;
-
- for (i=0;i<9;i++){
- comp[i] = *(ptr++);
- test[i] = 1;
- }
- for (i=0;i<127;i++){
- for (j=0;j<9;j++){
- test[j] = test[j] & !(comp[j] ^ *(ptr++));
- }
- }
- for (i=0;i<9;i++)
- if (test[i]) return (i+1);
- return (-1);
-}
-
-static unsigned char *
-find_header(unsigned char *block)
-{
- unsigned char *ptr, *head_ptr, *end;
- unsigned char header[]={0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00};
-
- ptr = block;
- end = block + EDID1_LEN;
- while (ptr<end) {
- int i;
- head_ptr = ptr;
- for (i=0;i<8;i++){
- if (header[i] != *(head_ptr++)) break;
- if (head_ptr == end) head_ptr = block;
- }
- if (i==8) break;
- ptr++;
- }
- if (ptr == end) return (NULL);
- return (ptr);
-}
-
-static unsigned char *
-resort(unsigned char *s_block)
-{
- unsigned char *d_new, *d_ptr, *d_end, *s_ptr, *s_end;
- unsigned char tmp;
-
- s_end = s_block + EDID1_LEN;
- d_new = xalloc(EDID1_LEN);
- if (!d_new) return NULL;
- d_end = d_new + EDID1_LEN;
-
- s_ptr = find_header(s_block);
- if (!s_ptr) return NULL;
- for (d_ptr=d_new;d_ptr<d_end;d_ptr++){
- tmp = *(s_ptr++);
- *d_ptr = tmp;
- if (s_ptr == s_end) s_ptr = s_block;
- }
- xfree(s_block);
- return (d_new);
-}
-
-