ShuriZma
/
melonDS
mirror of https://github.com/melonDS-emu/melonDS.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

SPU: Do clamping after applying SOUNDBIAS

This commit is contained in:
Nadia Holmquist Pedersen 2021-08-17 00:34:23 +02:00
parent 418b351986
commit 2aeb452dfb
1 changed files with 10 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
src/SPU.cpp
View File

@ -799,9 +799,18 @@ void Mix(u32 dummy)
rightoutput = ((s64)rightoutput * MasterVolume) >> 7;
leftoutput >>= 8;
rightoutput >>= 8;
// Add SOUNDBIAS value
// The value used by all commercial games is 0x200, so we subtract that so it won't offset the final sound output.
if (ApplyBias == true)
{
leftoutput += (Bias << 6) - 0x8000;
rightoutput += (Bias << 6) - 0x8000;
}
if (leftoutput < -0x8000) leftoutput = -0x8000;
else if (leftoutput > 0x7FFF) leftoutput = 0x7FFF;
rightoutput >>= 8;
if (rightoutput < -0x8000) rightoutput = -0x8000;
else if (rightoutput > 0x7FFF) rightoutput = 0x7FFF;
@ -812,14 +821,6 @@ void Mix(u32 dummy)
rightoutput &= 0xFFFFFFC0;
}
// Add SOUNDBIAS value
// The value used by all commercial games is 0x200, so we subtract that so it won't offset the final sound output.
if (ApplyBias == true)
{
leftoutput += (Bias << 6) - 0x8000;
rightoutput += (Bias << 6) - 0x8000;
}
// OutputBufferFrame can never get full because it's
// transfered to OutputBuffer at the end of the frame
OutputBackbuffer[OutputBackbufferWritePosition ] = leftoutput >> 1;