fate: allow tests to specify unit size for psnr comparison

Signed-off-by: Mans Rullgard <mans@mansr.com>

tests/Makefile

@@ -131,7 +131,7 @@ fate: $(FATE)
 
 $(FATE): $(FATE_UTILS:%=tests/%$(HOSTEXESUF))
 	@echo "TEST    $(@:fate-%=%)"
-	$(Q)$(SRC_PATH)/tests/fate-run.sh $@ "$(SAMPLES)" "$(TARGET_EXEC)" "$(TARGET_PATH)" '$(CMD)' '$(CMP)' '$(REF)' '$(FUZZ)' '$(THREADS)' '$(THREAD_TYPE)' '$(CPUFLAGS)' '$(CMP_SHIFT)' '$(CMP_TARGET)' '$(SIZE_TOLERANCE)'
+	$(Q)$(SRC_PATH)/tests/fate-run.sh $@ "$(SAMPLES)" "$(TARGET_EXEC)" "$(TARGET_PATH)" '$(CMD)' '$(CMP)' '$(REF)' '$(FUZZ)' '$(THREADS)' '$(THREAD_TYPE)' '$(CPUFLAGS)' '$(CMP_SHIFT)' '$(CMP_TARGET)' '$(SIZE_TOLERANCE)' '$(CMP_UNIT)'
 
 fate-list:
 	@printf '%s\n' $(sort $(FATE))

tests/fate-run.sh

@@ -21,6 +21,7 @@ cpuflags=${11:-all}
 cmp_shift=${12:-0}
 cmp_target=${13:-0}
 size_tolerance=${14:-0}
+cmp_unit=${15:-2}
 
 outdir="tests/data/fate"
 outfile="${outdir}/${test}"
@@ -40,7 +41,7 @@ compare(){
 }
 
 do_tiny_psnr(){
-    psnr=$(tests/tiny_psnr "$1" "$2" 2 $cmp_shift 0)
+    psnr=$(tests/tiny_psnr "$1" "$2" $cmp_unit $cmp_shift 0)
     val=$(expr "$psnr" : ".*$3: *\([0-9.]*\)")
     size1=$(expr "$psnr" : '.*bytes: *\([0-9]*\)')
     size2=$(expr "$psnr" : '.*bytes:[ 0-9]*/ *\([0-9]*\)')