# HG changeset patch
# User Matti Hamalainen <ccr@tnsp.org>
# Date 1528650063 -10800
# Node ID dd57dd9430cb232a2342e17bd2226073e552d912
# Parent  2dbb2b63f6b3b53254c88c3e1bba03c7fec06e2a
Improve ECI packed format probing.

diff -r 2dbb2b63f6b3 -r dd57dd9430cb tools/lib64fmts.c
--- a/tools/lib64fmts.c	Sun Jun 10 20:00:46 2018 +0300
+++ b/tools/lib64fmts.c	Sun Jun 10 20:01:03 2018 +0300
@@ -772,12 +772,24 @@
 
 static int fmtProbeECIPacked(const Uint8 *buf, const size_t len, const DMC64ImageFormat *fmt)
 {
+    size_t i, n;
+
     // XXX TODO: Perhaps count statistics about used byte values
     // and compare to value in buf[2] which is the RLE marker
-    if (len > 128 && dmCompareAddr16(buf, 0, fmt->addr))
+    if (len < 128 || !dmCompareAddr16(buf, 0, fmt->addr))
+        return DM_PROBE_SCORE_FALSE;
+
+    for (n = 0, i = 3; i < len; i++)
+        if (buf[i] == buf[2]) n++;
+
+    if (n > 50)
+        return DM_PROBE_SCORE_GOOD;
+    if (n > 25)
         return DM_PROBE_SCORE_AVG;
-    else
-        return DM_PROBE_SCORE_FALSE;
+    if (n > 10)
+        return DM_PROBE_SCORE_MAYBE;
+
+    return DM_PROBE_SCORE_FALSE;
 }