otomatalabs/furnace
8
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

change chan osc range - PLEASE READ

Browse source 
as of now the range is ~32768, either from -16384 to 16383, or 0 to 32767.
it previously was -32768 to 32767 (~65536).

this change was made to better suit chips that only output a positive value.
if you are working on a new chip, update your code and shift right by one if necessary.
This commit is contained in:
tildearrow 2023-06-16 17:30:11 -05:00
parent ad9981fdea
commit 29dfeccfe7
48 changed files with 126 additions and 129 deletions
Download patch file Download diff file Expand all files Collapse all files

12
src/engine/platform/opl.cpp
View file

@ -211,7 +211,7 @@ void DivPlatformOPL::acquire_nuked(short** buf, size_t len) {
if (!isMuted[adpcmChan]) {
os[0]-=aOut.data[0]>>3;
os[1]-=aOut.data[0]>>3;
oscBuf[adpcmChan]->data[oscBuf[adpcmChan]->needle++]=aOut.data[0];
oscBuf[adpcmChan]->data[oscBuf[adpcmChan]->needle++]=aOut.data[0]>>1;
} else {
oscBuf[adpcmChan]->data[oscBuf[adpcmChan]->needle++]=0;
}
@ -234,14 +234,13 @@ void DivPlatformOPL::acquire_nuked(short** buf, size_t len) {
if (fm.channel[i].out[3]!=NULL) {
oscBuf[i]->data[oscBuf[i]->needle]+=*fm.channel[ch].out[3];
}
oscBuf[i]->data[oscBuf[i]->needle]<<=1;
oscBuf[i]->needle++;
}
// special
oscBuf[melodicChans+1]->data[oscBuf[melodicChans+1]->needle++]=fm.slot[16].out*6;
oscBuf[melodicChans+2]->data[oscBuf[melodicChans+2]->needle++]=fm.slot[14].out*6;
oscBuf[melodicChans+3]->data[oscBuf[melodicChans+3]->needle++]=fm.slot[17].out*6;
oscBuf[melodicChans+4]->data[oscBuf[melodicChans+4]->needle++]=fm.slot[13].out*6;
oscBuf[melodicChans+1]->data[oscBuf[melodicChans+1]->needle++]=fm.slot[16].out*3;
oscBuf[melodicChans+2]->data[oscBuf[melodicChans+2]->needle++]=fm.slot[14].out*3;
oscBuf[melodicChans+3]->data[oscBuf[melodicChans+3]->needle++]=fm.slot[17].out*3;
oscBuf[melodicChans+4]->data[oscBuf[melodicChans+4]->needle++]=fm.slot[13].out*3;
} else {
for (int i=0; i<chans; i++) {
unsigned char ch=outChanMap[i];
@ -259,7 +258,6 @@ void DivPlatformOPL::acquire_nuked(short** buf, size_t len) {
if (fm.channel[i].out[3]!=NULL) {
oscBuf[i]->data[oscBuf[i]->needle]+=*fm.channel[ch].out[3];
}
oscBuf[i]->data[oscBuf[i]->needle]<<=1;
oscBuf[i]->needle++;
}
}