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VRC6 speedup/bugfix from Takashi Obara, FS #6635

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12239 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Adam Gashlin 2007-02-09 08:41:43 +00:00
parent 79a1fb1b29
commit 88c0d9d80f
1 changed files with 61 additions and 66 deletions
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127
apps/codecs/nsf.c
View file

@ -907,6 +907,66 @@ inline void Wave_N106_DoTicks(const int32_t ticks)
} }
} }
} }
/****************** VRC6 ******************/
#ifdef ICODE_INSTEAD_OF_INLINE
void Wave_VRC6_DoTicks(const int32_t ticks) ICODE_ATTR;
void Wave_VRC6_DoTicks(const int32_t ticks)
#else
inline void Wave_VRC6_DoTicks(const int32_t ticks);
inline void Wave_VRC6_DoTicks(const int32_t ticks)
#endif
{
register int32_t i;
for(i = 0; i < 2; i++) {
if(mWave_VRC6Pulse[i].bChannelEnabled) {
mWave_VRC6Pulse[i].nFreqCount -= ticks;
if(mWave_VRC6Pulse[i].nDutyCount <=
mWave_VRC6Pulse[i].nDutyCycle)
{
mWave_VRC6Pulse[i].nMixL =
VRC6Pulse_nOutputTable_L[mWave_VRC6Pulse[i].nVolume];
}
else
mWave_VRC6Pulse[i].nMixL = 0;
while(mWave_VRC6Pulse[i].nFreqCount <= 0) {
mWave_VRC6Pulse[i].nFreqCount +=
mWave_VRC6Pulse[i].nFreqTimer.W + 1;
if(!mWave_VRC6Pulse[i].bDigitized)
mWave_VRC6Pulse[i].nDutyCount =
(mWave_VRC6Pulse[i].nDutyCount + 1) & 0x0F;
}
}
}
if(mWave_VRC6Saw.bChannelEnabled) {
mWave_VRC6Saw.nFreqCount -= ticks;
mWave_VRC6Saw.nMixL =
VRC6Saw_nOutputTable_L[mWave_VRC6Saw.nAccum >> 3];
while(mWave_VRC6Saw.nFreqCount <= 0) {
mWave_VRC6Saw.nFreqCount += mWave_VRC6Saw.nFreqTimer.W + 1;
mWave_VRC6Saw.nAccumStep++;
if(mWave_VRC6Saw.nAccumStep == 14)
{
mWave_VRC6Saw.nAccumStep = 0;
mWave_VRC6Saw.nAccum = 0;
}
else if(!(mWave_VRC6Saw.nAccumStep & 1))
mWave_VRC6Saw.nAccum += mWave_VRC6Saw.nAccumRate;
}
}
}
/****************** Square waves ******************/ /****************** Square waves ******************/
@ -2219,72 +2279,7 @@ void EmulateAPU(uint8_t bBurnCPUCycles)
if(nExternalSound && !bPALMode) if(nExternalSound && !bPALMode)
{ {
if(nExternalSound & EXTSOUND_VRC6) if(nExternalSound & EXTSOUND_VRC6)
{ Wave_VRC6_DoTicks(tick);
if(mWave_VRC6Pulse[0].bChannelEnabled) {
mWave_VRC6Pulse[0].nFreqCount -= tick;
if(mWave_VRC6Pulse[0].nDutyCount <=
mWave_VRC6Pulse[0].nDutyCycle)
{
mWave_VRC6Pulse[0].nMixL =
VRC6Pulse_nOutputTable_L
[mWave_VRC6Pulse[0].nVolume];
} else mWave_VRC6Pulse[0].nMixL = 0;
while(mWave_VRC6Pulse[0].nFreqCount <= 0) {
mWave_VRC6Pulse[0].nFreqCount +=
mWave_VRC6Pulse[0].nFreqTimer.W + 1;
if(!mWave_VRC6Pulse[0].bDigitized)
mWave_VRC6Pulse[0].nDutyCount =
(mWave_VRC6Pulse[0].nDutyCount + 1) & 0x0F;
}
}
if(mWave_VRC6Pulse[1].bChannelEnabled) {
mWave_VRC6Pulse[1].nFreqCount -= tick;
if(mWave_VRC6Pulse[1].nDutyCount <=
mWave_VRC6Pulse[1].nDutyCycle)
{
mWave_VRC6Pulse[1].nMixL =
VRC6Pulse_nOutputTable_L
[mWave_VRC6Pulse[1].nVolume];
} else mWave_VRC6Pulse[1].nMixL = 0;
while(mWave_VRC6Pulse[1].nFreqCount <= 0) {
mWave_VRC6Pulse[1].nFreqCount +=
mWave_VRC6Pulse[1].nFreqTimer.W + 1;
if(!mWave_VRC6Pulse[1].bDigitized)
mWave_VRC6Pulse[1].nDutyCount =
(mWave_VRC6Pulse[1].nDutyCount + 1) & 0x0F;
}
}
mWave_VRC6Saw.nFreqCount -= tick;
mWave_VRC6Saw.nMixL =
VRC6Saw_nOutputTable_L[mWave_VRC6Saw.nAccum >> 3];
while(mWave_VRC6Saw.nFreqCount <= 0) {
mWave_VRC6Saw.nFreqCount += mWave_VRC6Saw.nFreqTimer.W + 1;
mWave_VRC6Saw.nAccumStep++;
if(mWave_VRC6Saw.nAccumStep == 14)
{
mWave_VRC6Saw.nAccumStep = 0;
mWave_VRC6Saw.nAccum = 0;
}
else if(!(mWave_VRC6Saw.nAccumStep & 1))
mWave_VRC6Saw.nAccum += mWave_VRC6Saw.nAccumRate;
}
} /* end VRC6 */
if(nExternalSound & EXTSOUND_N106) if(nExternalSound & EXTSOUND_N106)
Wave_N106_DoTicks(tick); Wave_N106_DoTicks(tick);
if(nExternalSound & EXTSOUND_FME07) if(nExternalSound & EXTSOUND_FME07)