ryan/mozjpeg
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Resolve mismatch with jpgcrush

Browse Source 
Add early termination to search for best Al parameter
This commit is contained in:
fbossen
2014-02-15 09:13:03 -05:00
parent dff12f6b87
commit e64d7453e9
1 changed files with 7 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
jcmaster.c
View File

@@ -591,10 +591,12 @@ select_scans (j_compress_ptr cinfo, int next_scan_number)
for (i = 0; i < Al; i++)
size[Al] += cinfo->scan_size[3 + 2*cinfo->Al_max_luma + i];
if (size[Al] < size[cinfo->best_Al])
if (Al == 0 || size[Al] < size[cinfo->best_Al])
cinfo->best_Al = Al;
else
break;
}
/* HACK! casting a const to a non-const :-( */
jpeg_scan_info *scanptr = (jpeg_scan_info *)&cinfo->scan_info[next_scan_number];
@@ -673,8 +675,10 @@ select_scans (j_compress_ptr cinfo, int next_scan_number)
size[Al] += cinfo->scan_size[base_scan_idx + 5 + 4*cinfo->Al_max_chroma + 2*i];
}
if (size[Al] < size[cinfo->best_Al])
if (Al == 0 || size[Al] < size[cinfo->best_Al])
cinfo->best_Al = Al;
else
break;
}
jpeg_scan_info *scanptr = (jpeg_scan_info *)&cinfo->scan_info[next_scan_number];