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-rw-r--r--source/soundux.cpp40
-rw-r--r--source/soundux.h1
2 files changed, 17 insertions, 24 deletions
diff --git a/source/soundux.cpp b/source/soundux.cpp
index d9a3436..c1a01c6 100644
--- a/source/soundux.cpp
+++ b/source/soundux.cpp
@@ -373,7 +373,6 @@ void S9xFixSoundAfterSnapshotLoad ()
{
SoundData.channels[i].needs_decode = TRUE;
S9xSetSoundFrequency (i, SoundData.channels[i].hertz);
- SoundData.channels [i].envxx = SoundData.channels [i].envx << ENVX_SHIFT;
SoundData.channels [i].next_sample = 0;
SoundData.channels [i].interpolate = 0;
SoundData.channels [i].previous [0] = (int32) SoundData.channels [i].previous16 [0];
@@ -429,7 +428,6 @@ void S9xSetEnvelopeHeight (int channel, int level)
Channel *ch = &SoundData.channels[channel];
ch->envx = level;
- ch->envxx = level << ENVX_SHIFT;
ch->left_vol_level = (level * ch->volume_left) / 128;
ch->right_vol_level = (level * ch->volume_right) / 128;
@@ -930,18 +928,17 @@ void MixStereo (int sample_count)
if (ch->env_error >= FIXED_POINT)
{
uint32 step = ch->env_error >> FIXED_POINT_SHIFT;
+ int32 envx_shifted;
switch (ch->state)
{
case SOUND_ATTACK:
ch->env_error &= FIXED_POINT_REMAINDER;
ch->envx += step << 1;
- ch->envxx = ch->envx << ENVX_SHIFT;
if (ch->envx >= 126)
{
ch->envx = 127;
- ch->envxx = 127 << ENVX_SHIFT;
ch->state = SOUND_DECAY;
if (ch->sustain_level != 8)
{
@@ -956,12 +953,13 @@ void MixStereo (int sample_count)
break;
case SOUND_DECAY:
+ envx_shifted = ch->envx << ENVX_SHIFT;
while (ch->env_error >= FIXED_POINT)
{
- ch->envxx = (ch->envxx >> 8) * 255;
+ envx_shifted = (envx_shifted >> 8) * 255;
ch->env_error -= FIXED_POINT;
}
- ch->envx = ch->envxx >> ENVX_SHIFT;
+ ch->envx = envx_shifted >> ENVX_SHIFT;
if (ch->envx <= ch->envx_target)
{
if (ch->envx <= 0)
@@ -975,12 +973,13 @@ void MixStereo (int sample_count)
break;
case SOUND_SUSTAIN:
+ envx_shifted = ch->envx << ENVX_SHIFT;
while (ch->env_error >= FIXED_POINT)
{
- ch->envxx = (ch->envxx >> 8) * 255;
+ envx_shifted = (envx_shifted >> 8) * 255;
ch->env_error -= FIXED_POINT;
}
- ch->envx = ch->envxx >> ENVX_SHIFT;
+ ch->envx = envx_shifted >> ENVX_SHIFT;
if (ch->envx <= 0)
{
S9xAPUSetEndOfSample (J, ch);
@@ -989,12 +988,13 @@ void MixStereo (int sample_count)
break;
case SOUND_RELEASE:
+ envx_shifted = ch->envx << ENVX_SHIFT;
while (ch->env_error >= FIXED_POINT)
{
- ch->envxx -= (MAX_ENVELOPE_HEIGHT << ENVX_SHIFT) / 256;
+ envx_shifted -= (MAX_ENVELOPE_HEIGHT << ENVX_SHIFT) / 256;
ch->env_error -= FIXED_POINT;
}
- ch->envx = ch->envxx >> ENVX_SHIFT;
+ ch->envx = envx_shifted >> ENVX_SHIFT;
if (ch->envx <= 0)
{
S9xAPUSetEndOfSample (J, ch);
@@ -1005,12 +1005,10 @@ void MixStereo (int sample_count)
case SOUND_INCREASE_LINEAR:
ch->env_error &= FIXED_POINT_REMAINDER;
ch->envx += step << 1;
- ch->envxx = ch->envx << ENVX_SHIFT;
if (ch->envx >= 126)
{
ch->envx = 127;
- ch->envxx = 127 << ENVX_SHIFT;
ch->state = SOUND_GAIN;
ch->mode = MODE_GAIN;
S9xSetEnvRate (ch, 0, -1, 0);
@@ -1020,24 +1018,23 @@ void MixStereo (int sample_count)
case SOUND_INCREASE_BENT_LINE:
if (ch->envx >= (MAX_ENVELOPE_HEIGHT * 3) / 4)
{
+ envx_shifted = ch->envx << ENVX_SHIFT;
while (ch->env_error >= FIXED_POINT)
{
- ch->envxx += (MAX_ENVELOPE_HEIGHT << ENVX_SHIFT) / 256;
+ envx_shifted += (MAX_ENVELOPE_HEIGHT << ENVX_SHIFT) / 256;
ch->env_error -= FIXED_POINT;
}
- ch->envx = ch->envxx >> ENVX_SHIFT;
+ ch->envx = envx_shifted >> ENVX_SHIFT;
}
else
{
ch->env_error &= FIXED_POINT_REMAINDER;
ch->envx += step << 1;
- ch->envxx = ch->envx << ENVX_SHIFT;
}
if (ch->envx >= 126)
{
ch->envx = 127;
- ch->envxx = 127 << ENVX_SHIFT;
ch->state = SOUND_GAIN;
ch->mode = MODE_GAIN;
S9xSetEnvRate (ch, 0, -1, 0);
@@ -1047,7 +1044,6 @@ void MixStereo (int sample_count)
case SOUND_DECREASE_LINEAR:
ch->env_error &= FIXED_POINT_REMAINDER;
ch->envx -= step << 1;
- ch->envxx = ch->envx << ENVX_SHIFT;
if (ch->envx <= 0)
{
S9xAPUSetEndOfSample (J, ch);
@@ -1056,12 +1052,13 @@ void MixStereo (int sample_count)
break;
case SOUND_DECREASE_EXPONENTIAL:
+ envx_shifted = ch->envx << ENVX_SHIFT;
while (ch->env_error >= FIXED_POINT)
{
- ch->envxx = (ch->envxx >> 8) * 255;
+ envx_shifted = (envx_shifted >> 8) * 255;
ch->env_error -= FIXED_POINT;
}
- ch->envx = ch->envxx >> ENVX_SHIFT;
+ ch->envx = envx_shifted >> ENVX_SHIFT;
if (ch->envx <= 0)
{
S9xAPUSetEndOfSample (J, ch);
@@ -1800,7 +1797,7 @@ END_OF_FUNCTION(S9xMixSamples);
void S9xResetSound (bool8 full)
{
- for (int i = 0; i < 8; i++)
+ for (int i = 0; i < NUM_CHANNELS; i++)
{
SoundData.channels[i].state = SOUND_SILENT;
SoundData.channels[i].mode = MODE_NONE;
@@ -1814,7 +1811,6 @@ void S9xResetSound (bool8 full)
SoundData.channels[i].env_error = 0;
SoundData.channels[i].erate = 0;
SoundData.channels[i].envx = 0;
- SoundData.channels[i].envxx = 0;
SoundData.channels[i].left_vol_level = 0;
SoundData.channels[i].right_vol_level = 0;
SoundData.channels[i].direction = 0;
@@ -1979,7 +1975,6 @@ void S9xPlaySample (int channel)
ch->state = SOUND_SILENT;
ch->mode = MODE_NONE;
ch->envx = 0;
- ch->envxx = 0;
S9xFixEnvelope (channel,
APU.DSP [APU_GAIN + (channel << 4)],
@@ -2032,7 +2027,6 @@ void S9xPlaySample (int channel)
ch->right_vol_level = 0;
S9xSetEnvRate (ch, ch->attack_rate, 1, MAX_ENVELOPE_HEIGHT);
}
- ch->envxx = ch->envx << ENVX_SHIFT;
break;
case MODE_GAIN:
diff --git a/source/soundux.h b/source/soundux.h
index b67dc2a..9bb2a22 100644
--- a/source/soundux.h
+++ b/source/soundux.h
@@ -178,7 +178,6 @@ typedef struct {
uint32 sample_pointer;
int *echo_buf_ptr;
int mode;
- int32 envxx;
signed short next_sample;
int32 interpolate;
int32 previous [2];
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-03 09:36:57 +0000