otomatalabs/furnace
7
0
Fork 0
Code Issues Pull requests Actions Packages Projects Releases Wiki Activity

IT import: fix stereo sample downmix

Browse source
This commit is contained in:
tildearrow 2024-06-24 16:43:51 -05:00
parent fbe95a1c08
commit 76417e6769
1 changed files with 19 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
src/engine/fileOps/it.cpp
View file

@ -400,19 +400,27 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
if (flags&4) { // downmix stereo
for (unsigned int i=0; i<s->samples; i++) {
short l;
short r;
if (convert&2) {
l=reader.readS_BE();
r=reader.readS_BE();
} else {
l=reader.readS();
r=reader.readS();
}
if (!(convert&1)) {
l^=0x8000;
}
s->data16[i]=l;
}
for (unsigned int i=0; i<s->samples; i++) {
short r;
if (convert&2) {
r=reader.readS_BE();
} else {
r=reader.readS();
}
if (!(convert&1)) {
r^=0x8000;
}
s->data16[i]=(l+r)>>1;
s->data16[i]=(s->data16[i]+r)>>1;
}
} else {
for (unsigned int i=0; i<s->samples; i++) {
@ -427,12 +435,17 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
if (flags&4) { // downmix stereo
for (unsigned int i=0; i<s->samples; i++) {
signed char l=reader.readC();
signed char r=reader.readC();
if (!(convert&1)) {
l^=0x80;
}
s->data8[i]=l;
}
for (unsigned int i=0; i<s->samples; i++) {
signed char r=reader.readC();
if (!(convert&1)) {
r^=0x80;
}
s->data8[i]=(l+r)>>1;
s->data8[i]=(s->data8[i]+r)>>1;
}
} else {
for (unsigned int i=0; i<s->samples; i++) {