ref: 748142a97c32cd48a8df7e354b40d9638e27ae38
parent: bcbb3563b4341791753a50a6dff3f6cd2aab0620
author: 23hiro <23hiro@gmail.com>
date: Tue Sep 24 18:53:20 EDT 2019
win32: audio scale fix (thanks Jacob Moody)
--- a/kern/devaudio-win32.c
+++ b/kern/devaudio-win32.c
@@ -54,9 +54,9 @@
{DWORD v;
- //Windows uses a 0-255 scale, plan9 uses 0-100
- v = right*0xFF/100;
- v = (v<<8)|left*0xFF/100;
+ //Windows uses a 0-0xFFFF scale, plan9 uses 0-100
+ v = right*0xFFFF/100;
+ v = (v<<16)|(left*0xFFFF/100);
if(waveOutSetVolume(waveout, v) != MMSYSERR_NOERROR)
oserror();
}
@@ -68,8 +68,8 @@
if(waveOutGetVolume(waveout, &v) != MMSYSERR_NOERROR)
oserror();
- *left = (v&0xFF)*100/0xFF;
- *right = ((v>>8)&0xFF)*100/0xFF;
+ *left = (v&0xFFFF)*100/0xFFFF;
+ *right = ((v>>16)&0xFFFF)*100/0xFFFF;
}
int