mirror/miniaudio
1
0
Fork 0
mirror of https://github.com/mackron/miniaudio.git synced 2026-04-22 00:06:59 +02:00
Code Issues Packages Projects Releases Wiki Activity

Improve auto-generation of format conversion routines.

Browse Source
This commit is contained in:
David Reid
2017-11-16 21:36:04 +10:00
parent 77128b0a05
commit 0a69454845
3 changed files with 36 additions and 79 deletions
Download Patch File Download Diff File Expand all files Collapse all files
resources/format_conversions.txt
+21 -26
View File
@@ -116,53 +116,48 @@ s32->s24 {
shr r x 8;
}
# r = x / (2147483647 + sign(x))
# r = ((x + 2147483648) * 0.0000000004656612873077392578125) - 1
s32->f32 {
int s;
sig s x;
add s s 2147483647;
div r x (flt)(uint)s;
dbl t;
add (dbl)t x 2147483648;
mul t t 0.0000000004656612873077392578125;
sub (flt)r t 1;
}
# r = (clip(x) * (0x7F + sign(x))) + 128
# r = (clip(x) + 1) * 127.5
f32->u8 {
flt c;
int s;
clip c x;
sig s x;
add s s 127;
mul (int)r c s;
add r r 128;
add c c 1;
mul (int)r c 127.5f;
}
# r = clip(x) * (0x7FFF + sign(x))
# r = (clip(x) + 1) * 32767.5 - 32768
f32->s16 {
flt c;
int s;
clip c x;
sig s x;
add s s 32767;
mul (int)r c s;
add c c 1;
mul (int)r c 32767.5f;
sub r r 32768;
}
# r = clip(x) * (0x7FFFFF + sign(x))
# r = (clip(x) + 1) * 8388607.5 - 8388608
f32->s24 {
flt c;
int s;
clip c x;
sig s x;
add s s 8388607;
mul (int)r c s;
add c c 1;
mul (int)r c 8388607.5f;
sub r r 8388608;
}
# r = clip(x) * (0x7FFFFFFF + sign(x))
# r = (clip(x) + 1) * 2147483647.5 - 2147483648
f32->s32 {
flt c;
lng s;
lng t;
clip c x;
sig s x;
add s s 2147483647;
mul (int)r c s;
add c c 1;
mul (lng)t c 2147483647.5;
sub (int)r t 2147483648;
}