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Smooth sound after loading state

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Moved function-level static variables outside of functions and renamed them
This commit is contained in:
Dwedit
2018-03-15 19:50:46 -05:00
parent 16170cdfa7
commit b9df5f188c
3 changed files with 65 additions and 38 deletions
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92
src/sound.c
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@@ -706,11 +706,11 @@ static void RDoTriangle(void) {
ChannelBC[2] = SOUNDTS;
}
static void RDoTriangleNoisePCMLQ(void) {
static uint32 tcout = 0;
static int32 triacc = 0;
static int32 noiseacc = 0;
uint32 lq_tcout = 0;
int32 lq_triacc = 0;
int32 lq_noiseacc = 0;
static void RDoTriangleNoisePCMLQ(void) {
int32 V;
int32 start, end;
int32 freq[2];
@@ -752,77 +752,77 @@ static void RDoTriangleNoisePCMLQ(void) {
nshift = 13;
totalout = wlookup2[tcout + noiseout + RawDALatch];
totalout = wlookup2[lq_tcout + noiseout + RawDALatch];
if (inie[0] && inie[1]) {
for (V = start; V < end; V++) {
Wave[V >> 4] += totalout;
triacc -= inie[0];
noiseacc -= inie[1];
lq_triacc -= inie[0];
lq_noiseacc -= inie[1];
if (triacc <= 0) {
if (lq_triacc <= 0) {
rea:
triacc += freq[0]; /* t; */
lq_triacc += freq[0]; /* t; */
tristep = (tristep + 1) & 0x1F;
if (triacc <= 0) goto rea;
tcout = (tristep & 0xF);
if (!(tristep & 0x10)) tcout ^= 0xF;
tcout = tcout * 3;
totalout = wlookup2[tcout + noiseout + RawDALatch];
if (lq_triacc <= 0) goto rea;
lq_tcout = (tristep & 0xF);
if (!(tristep & 0x10)) lq_tcout ^= 0xF;
lq_tcout = lq_tcout * 3;
totalout = wlookup2[lq_tcout + noiseout + RawDALatch];
}
if (noiseacc <= 0) {
if (lq_noiseacc <= 0) {
rea2:
/* used to added <<(16+2) when the noise table
* values were half.
*/
if (PAL)
noiseacc += PALNoiseFreqTable[PSG[0xE] & 0xF] << (16 + 1);
lq_noiseacc += PALNoiseFreqTable[PSG[0xE] & 0xF] << (16 + 1);
else
noiseacc += NTSCNoiseFreqTable[PSG[0xE] & 0xF] << (16 + 1);
lq_noiseacc += NTSCNoiseFreqTable[PSG[0xE] & 0xF] << (16 + 1);
nreg = (nreg << 1) + (((nreg >> nshift) ^ (nreg >> 14)) & 1);
nreg &= 0x7fff;
noiseout = amptab[(nreg >> 0xe) & 1];
if (noiseacc <= 0) goto rea2;
totalout = wlookup2[tcout + noiseout + RawDALatch];
if (lq_noiseacc <= 0) goto rea2;
totalout = wlookup2[lq_tcout + noiseout + RawDALatch];
} /* noiseacc<=0 */
} /* for(V=... */
} else if (inie[0]) {
for (V = start; V < end; V++) {
Wave[V >> 4] += totalout;
triacc -= inie[0];
lq_triacc -= inie[0];
if (triacc <= 0) {
if (lq_triacc <= 0) {
area:
triacc += freq[0]; /* t; */
lq_triacc += freq[0]; /* t; */
tristep = (tristep + 1) & 0x1F;
if (triacc <= 0) goto area;
tcout = (tristep & 0xF);
if (!(tristep & 0x10)) tcout ^= 0xF;
tcout = tcout * 3;
totalout = wlookup2[tcout + noiseout + RawDALatch];
if (lq_triacc <= 0) goto area;
lq_tcout = (tristep & 0xF);
if (!(tristep & 0x10)) lq_tcout ^= 0xF;
lq_tcout = lq_tcout * 3;
totalout = wlookup2[lq_tcout + noiseout + RawDALatch];
}
}
} else if (inie[1]) {
for (V = start; V < end; V++) {
Wave[V >> 4] += totalout;
noiseacc -= inie[1];
if (noiseacc <= 0) {
lq_noiseacc -= inie[1];
if (lq_noiseacc <= 0) {
area2:
/* used to be added <<(16+2) when the noise table
* values were half.
*/
if (PAL)
noiseacc += PALNoiseFreqTable[PSG[0xE] & 0xF] << (16 + 1);
lq_noiseacc += PALNoiseFreqTable[PSG[0xE] & 0xF] << (16 + 1);
else
noiseacc += NTSCNoiseFreqTable[PSG[0xE] & 0xF] << (16 + 1);
lq_noiseacc += NTSCNoiseFreqTable[PSG[0xE] & 0xF] << (16 + 1);
nreg = (nreg << 1) + (((nreg >> nshift) ^ (nreg >> 14)) & 1);
nreg &= 0x7fff;
noiseout = amptab[(nreg >> 0xe) & 1];
if (noiseacc <= 0) goto area2;
totalout = wlookup2[tcout + noiseout + RawDALatch];
if (lq_noiseacc <= 0) goto area2;
totalout = wlookup2[lq_tcout + noiseout + RawDALatch];
} /* noiseacc<=0 */
}
} else {
@@ -1162,7 +1162,31 @@ SFORMAT FCEUSND_STATEINFO[] = {
{ &DMCAddressLatch, 1, "5ADL" },
{ &DMCFormat, 1, "5FMT" },
{ &RawDALatch, 1, "RWDA" },
{ 0 }
//these are important for smooth sound after loading state
{ &sqacc[0], sizeof(sqacc[0]) | FCEUSTATE_RLSB, "SAC1" },
{ &sqacc[1], sizeof(sqacc[1]) | FCEUSTATE_RLSB, "SAC2" },
{ &RectDutyCount, sizeof(RectDutyCount) | FCEUSTATE_RLSB, "RCTD"},
{ &tristep, sizeof(tristep) | FCEUSTATE_RLSB, "TRIS"},
{ &lq_triacc, sizeof(lq_triacc) | FCEUSTATE_RLSB, "TACC" },
{ &lq_noiseacc, sizeof(lq_noiseacc) | FCEUSTATE_RLSB, "NACC" },
//not sure about these, but save/load them anyway
{ &ChannelBC[0], sizeof(ChannelBC[1]) | FCEUSTATE_RLSB, "CBC1" },
{ &ChannelBC[1], sizeof(ChannelBC[1]) | FCEUSTATE_RLSB, "CBC2" },
{ &ChannelBC[2], sizeof(ChannelBC[2]) | FCEUSTATE_RLSB, "CBC3" },
{ &ChannelBC[3], sizeof(ChannelBC[3]) | FCEUSTATE_RLSB, "CBC4" },
{ &ChannelBC[4], sizeof(ChannelBC[4]) | FCEUSTATE_RLSB, "CBC5" },
{ &sound_timestamp, sizeof(sound_timestamp) | FCEUSTATE_RLSB, "SNTS" },
{ &soundtsoffs, sizeof(soundtsoffs) | FCEUSTATE_RLSB, "TSOF"},
{ &wlcount[0], sizeof(wlcount[0]) | FCEUSTATE_RLSB, "WLC1" },
{ &wlcount[1], sizeof(wlcount[1]) | FCEUSTATE_RLSB, "WLC2" },
{ &wlcount[2], sizeof(wlcount[2]) | FCEUSTATE_RLSB, "WLC3" },
{ &wlcount[3], sizeof(wlcount[3]) | FCEUSTATE_RLSB, "WLC4" },
{ &sexyfilter_acc1, sizeof(sexyfilter_acc1) | FCEUSTATE_RLSB, "FAC1" },
{ &sexyfilter_acc2, sizeof(sexyfilter_acc2) | FCEUSTATE_RLSB, "FAC2" },
{ &lq_tcout, sizeof(lq_tcout) | FCEUSTATE_RLSB, "TCOU"},
{ 0 }
};
void FCEUSND_SaveState(void) {