diff options
Diffstat (limited to 'Alc/alu.cpp')
| -rw-r--r-- | Alc/alu.cpp | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/Alc/alu.cpp b/Alc/alu.cpp index 0e91844b..6abc26e1 100644 --- a/Alc/alu.cpp +++ b/Alc/alu.cpp @@ -1587,12 +1587,12 @@ template<> inline ALfloat SampleConv(ALfloat val) noexcept { return val; } template<> inline ALint SampleConv(ALfloat val) noexcept { - /* Floats have a 23-bit mantissa. There is an implied 1 bit in the mantissa - * along with the sign bit, giving 25 bits total, so [-16777216, +16777216] - * is the max value a normalized float can be scaled to before losing - * precision. + /* Floats have a 23-bit mantissa, plus an implied 1 bit and a sign bit. + * This means a normalized float has at most 25 bits of signed precision. + * When scaling and clamping for a signed 32-bit integer, these following + * values are the best a float can give. */ - return fastf2i(clampf(val*16777216.0f, -16777216.0f, 16777215.0f))<<7; + return fastf2i(clampf(val*2147483648.0f, -2147483648.0f, 2147483520.0f)); } template<> inline ALshort SampleConv(ALfloat val) noexcept { return fastf2i(clampf(val*32768.0f, -32768.0f, 32767.0f)); } |