X-Git-Url: https://git.sesse.net/?p=fjl;a=blobdiff_plain;f=idct_test.c;h=bd39c7467e5f0e79ff361daf7b97df92968a55c1;hp=d7b543cbc931f3f6f63782ab175524eedb438f8f;hb=19a58db08afd149a862506936093423db756a2dc;hpb=85cda6b1da31916b0127d1217825dea725619245

diff --git a/idct_test.c b/idct_test.c
index d7b543c..bd39c74 100644
--- a/idct_test.c
+++ b/idct_test.c
@@ -76,8 +76,13 @@ void test_dc_becomes_spread_out(idct_alloc_t* idct_alloc, idct_free_t* idct_free
 
 	void* userdata = idct_alloc(quant);
 
-	for (unsigned i = 0; i < 255*8; ++i) {	
-		uint32_t reference_value = i / 8;
+	for (unsigned i = -255*8; i < 255*16; ++i) {	
+		int reference_value = i / 8 + 128;
+		if (reference_value < 0) {
+			reference_value = 0;
+		} else if (reference_value > 255) {
+			reference_value = 255;
+		}
 		coeff[0] = i;
 
 		(*idct)(coeff, userdata, output);