Add note regarding the fact that 4:4:0 lacks full SIMD support; Add an option for benchmarking 4:4:0 subsampling in tjbench.
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1008 632fc199-4ca6-4c93-a231-07263d6284db
diff --git a/tjbench.c b/tjbench.c
index 87b462f..105a4cc 100644
--- a/tjbench.c
+++ b/tjbench.c
@@ -1,5 +1,5 @@
/*
- * Copyright (C)2009-2012 D. R. Commander. All Rights Reserved.
+ * Copyright (C)2009-2013 D. R. Commander. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@@ -686,6 +686,7 @@
printf(" codec\n");
printf("-accuratedct = Use the most accurate DCT/IDCT algorithms available in the\n");
printf(" underlying codec\n");
+ printf("-440 = Test 4:4:0 chrominance subsampling instead of 4:2:2\n");
printf("-quiet = Output results in tabular rather than verbose format\n");
printf("-yuvencode = Encode RGB input as planar YUV rather than compressing as JPEG\n");
printf("-yuvdecode = Decode JPEG image to planar YUV rather than RGB\n");
@@ -719,7 +720,7 @@
{
unsigned char *srcbuf=NULL; int w, h, i, j;
int minqual=-1, maxqual=-1; char *temp;
- int minarg=2; int retval=0;
+ int minarg=2, retval=0, do440=0;
if((scalingfactors=tjGetScalingFactors(&nsf))==NULL || nsf==0)
_throwtj("executing tjGetScalingFactors()");
@@ -810,6 +811,7 @@
printf("Using most accurate DCT/IDCT algorithm\n\n");
flags|=TJFLAG_ACCURATEDCT;
}
+ if(!strcmp(argv[i], "-440")) do440=1;
if(!strcasecmp(argv[i], "-rgb")) pf=TJPF_RGB;
if(!strcasecmp(argv[i], "-rgbx")) pf=TJPF_RGBX;
if(!strcasecmp(argv[i], "-bgr")) pf=TJPF_BGR;
@@ -902,7 +904,7 @@
dotest(srcbuf, w, h, TJ_420, i, argv[1]);
printf("\n");
for(i=maxqual; i>=minqual; i--)
- dotest(srcbuf, w, h, TJ_422, i, argv[1]);
+ dotest(srcbuf, w, h, do440? TJSAMP_440:TJ_422, i, argv[1]);
printf("\n");
for(i=maxqual; i>=minqual; i--)
dotest(srcbuf, w, h, TJ_444, i, argv[1]);