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Namco WSG: per-channel oscilloscope

This commit is contained in:
tildearrow 2022-06-20 18:20:49 -05:00
parent 57fab16269
commit ee709b85c2
3 changed files with 16 additions and 9 deletions
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13
src/engine/platform/namcowsg.cpp
View File

@ -164,9 +164,6 @@ const char* DivPlatformNamcoWSG::getEffectName(unsigned char effect) {
}
void DivPlatformNamcoWSG::acquire(short* bufL, short* bufR, size_t start, size_t len) {
short* buf[2]={
bufL+start, bufR+start
};
while (!writes.empty()) {
QueuedWrite w=writes.front();
switch (devType) {
@ -186,7 +183,15 @@ void DivPlatformNamcoWSG::acquire(short* bufL, short* bufR, size_t start, size_t
regPool[w.addr&0x3f]=w.val;
writes.pop();
}
namco->sound_stream_update(buf,len);
for (size_t h=start; h<start+len; h++) {
short* buf[2]={
bufL+h, bufR+h
};
namco->sound_stream_update(buf,1);
for (int i=0; i<chans; i++) {
oscBuf[i]->data[oscBuf[i]->needle++]=namco->m_channel_list[i].last_out*chans;
}
}
}
void DivPlatformNamcoWSG::updateWave(int ch) {

9
src/engine/platform/sound/namco.cpp
View File

@ -172,10 +172,11 @@ void namco_audio_device::build_decoded_waveform(uint8_t *rgnbase)
/* generate sound by oversampling */
uint32_t namco_audio_device::namco_update_one(short* buffer, int size, const int16_t *wave, uint32_t counter, uint32_t freq)
uint32_t namco_audio_device::namco_update_one(short* buffer, int size, const int16_t *wave, uint32_t counter, uint32_t freq, int16_t& last_out)
{
for (int sampindex = 0; sampindex < size; sampindex++)
{
last_out=wave[WAVEFORM_POSITION(counter)];
buffer[sampindex]+=wave[WAVEFORM_POSITION(counter)];
counter += freq;
}
@ -700,7 +701,7 @@ void namco_audio_device::sound_stream_update(short** outputs, int len)
const int16_t *lw = &m_waveform[lv][voice->waveform_select * 32];
/* generate sound into the buffer */
c = namco_update_one(lmix, len, lw, voice->counter, voice->frequency);
c = namco_update_one(lmix, len, lw, voice->counter, voice->frequency, voice->last_out);
}
/* only update if we have non-zero right volume */
@ -709,7 +710,7 @@ void namco_audio_device::sound_stream_update(short** outputs, int len)
const int16_t *rw = &m_waveform[rv][voice->waveform_select * 32];
/* generate sound into the buffer */
c = namco_update_one(rmix, len, rw, voice->counter, voice->frequency);
c = namco_update_one(rmix, len, rw, voice->counter, voice->frequency, voice->last_out);
}
/* update the counter for this voice */
@ -789,7 +790,7 @@ void namco_audio_device::sound_stream_update(short** outputs, int len)
const int16_t *w = &m_waveform[v][voice->waveform_select * 32];
/* generate sound into buffer and update the counter for this voice */
voice->counter = namco_update_one(buffer, len, w, voice->counter, voice->frequency);
voice->counter = namco_update_one(buffer, len, w, voice->counter, voice->frequency, voice->last_out);
}
}
}

3
src/engine/platform/sound/namco.h
View File

@ -31,6 +31,7 @@ public:
uint32_t noise_counter;
int32_t noise_hold;
int32_t waveform_select;
int16_t last_out;
};
namco_audio_device(uint32_t clock);
@ -43,7 +44,7 @@ public:
void build_decoded_waveform( uint8_t *rgnbase );
void update_namco_waveform(int offset, uint8_t data);
uint32_t namco_update_one(short* buffer, int size, const int16_t *wave, uint32_t counter, uint32_t freq);
uint32_t namco_update_one(short* buffer, int size, const int16_t *wave, uint32_t counter, uint32_t freq, int16_t& last_out);
/* waveform region */
uint8_t* m_wave_ptr;