diff options
Diffstat (limited to 'chapters/introduction.adoc')
| -rw-r--r-- | chapters/introduction.adoc | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/chapters/introduction.adoc b/chapters/introduction.adoc index 51247bc..2827399 100644 --- a/chapters/introduction.adoc +++ b/chapters/introduction.adoc @@ -444,7 +444,9 @@ int32_t apply_lookup(int16_t *table, int32_t value) int32_t fraction = clipped_value & 0x7f; int16_t base = table[index]; int16_t next = table[index+1]; - int32_t return_value = (base << 7) + (next - base) * fraction; + int32_t slope = next - base; + REQUIRE(slope >= minimum<int16_t> && slope <= maximum<int16_t>) + int32_t return_value = (base << 7) + slope * fraction; return return_value; // return interpolated value of 16 + 7 = 23 bits } ---- |