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fix low quality not working in acquireDirect

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performance may be reduced
This commit is contained in:
tildearrow 2025-04-07 23:12:27 -05:00
parent 584305f1fa
commit 032ff82955
4 changed files with 22 additions and 23 deletions
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5
extern/blip_buf/blip_buf.c vendored
View file

@ -299,7 +299,7 @@ possibly-wider fixed_t. On 32-bit platforms, this is likely more efficient.
And by having pre_shift 32, a 32-bit platform can easily do the shift by
simply ignoring the low half. */
void blip_add_delta( blip_t* m, unsigned time, int delta )
void blip_add_delta_slow( blip_t* m, unsigned time, int delta )
{
unsigned fixed = (unsigned) ((time * m->factor + m->offset) >> pre_shift);
buf_t* out = SAMPLES( m ) + m->avail + (fixed >> frac_bits);
@ -350,3 +350,6 @@ void blip_add_delta_fast( blip_t* m, unsigned time, int delta )
out [7] += delta * delta_unit - delta2;
out [8] += delta2;
}
/* (tildearrow) ability to change blip_add_delta at runtime */
void (*blip_add_delta)( blip_t*, unsigned int, int )=blip_add_delta_slow;

5
extern/blip_buf/blip_buf.h vendored
View file

@ -35,8 +35,11 @@ blip_max_ratio = 1 << 20 };
/** Clears entire buffer. Afterwards, blip_samples_avail() == 0. */
void blip_clear( blip_t* );
/** (tildearrow) ability to change blip_add_delta at runtime */
extern void (*blip_add_delta)( blip_t*, unsigned int, int );
/** Adds positive/negative delta into buffer at specified clock time. */
void blip_add_delta( blip_t*, unsigned int clock_time, int delta );
void blip_add_delta_slow( blip_t*, unsigned int clock_time, int delta );
/** Same as blip_add_delta(), but uses faster, lower-quality synthesis. */
void blip_add_delta_fast( blip_t*, unsigned int clock_time, int delta );

13
src/engine/dispatchContainer.cpp
View file

@ -194,18 +194,6 @@ void DivDispatchContainer::fillBuf(size_t runtotal, size_t offset, size_t size)
}
}
}
if (lowQuality) {
for (int i=0; i<outs; i++) {
if (bbIn[i]==NULL) continue;
if (bb[i]==NULL) continue;
for (size_t j=0; j<runtotal; j++) {
if (bbIn[i][j]==temp[i]) continue;
temp[i]=bbIn[i][j];
blip_add_delta_fast(bb[i],j,temp[i]-prevSample[i]);
prevSample[i]=temp[i];
}
}
} else {
for (int i=0; i<outs; i++) {
if (bbIn[i]==NULL) continue;
if (bb[i]==NULL) continue;
@ -217,7 +205,6 @@ void DivDispatchContainer::fillBuf(size_t runtotal, size_t offset, size_t size)
}
}
}
}
for (int i=0; i<outs; i++) {
if (bbOut[i]==NULL) continue;

6
src/engine/engine.cpp
View file

@ -3763,6 +3763,12 @@ void DivEngine::initDispatch(bool isRender) {
lowQuality=getConfInt("audioQuality",0);
dcHiPass=getConfInt("audioHiPass",1);
if (lowQuality) {
blip_add_delta=blip_add_delta_fast;
} else {
blip_add_delta=blip_add_delta_slow;
}
for (int i=0; i<song.systemLen; i++) {
disCont[i].init(song.system[i],this,getChannelCount(song.system[i]),got.rate,song.systemFlags[i],isRender);
disCont[i].setRates(got.rate);