static void tms36xx_sound_update(int param, INT16 *buffer, int length)
{
struct TMS36XX *tms = tms36xx[param];
int samplerate = tms->samplerate;
/* no tune played? */
if( !tunes[tms->tune_num] || tms->voices == 0 )
{
while (--length >= 0)
buffer[length] = 0;
return;
}
while( length-- > 0 )
{
int sum = 0;
/* decay the twelve voices */
DECAY( 0) DECAY( 1) DECAY( 2) DECAY( 3) DECAY( 4) DECAY( 5)
DECAY( 6) DECAY( 7) DECAY( 8) DECAY( 9) DECAY(10) DECAY(11)
/* musical note timing */
tms->tune_counter -= tms->speed;
if( tms->tune_counter <= 0 )
{
int n = (-tms->tune_counter / samplerate) + 1;
tms->tune_counter += n * samplerate;
if( (tms->note_counter -= n) <= 0 )
{
tms->note_counter += VMAX;
if (tms->tune_ofs < tms->tune_max)
{
/* shift to the other 'bank' of voices */
tms->shift ^= 6;
/* restart one 'bank' of voices */
RESTART(0) RESTART(1) RESTART(2)
RESTART(3) RESTART(4) RESTART(5)
tms->tune_ofs++;
}
}
}
/* update the twelve voices */
TONE( 0) TONE( 1) TONE( 2) TONE( 3) TONE( 4) TONE( 5)
TONE( 6) TONE( 7) TONE( 8) TONE( 9) TONE(10) TONE(11)
*buffer++ = sum / tms->voices;
}
}
static STREAM_UPDATE( tms36xx_sound_update )
{
tms_state *tms = (tms_state *)param;
int samplerate = tms->samplerate;
stream_sample_t *buffer = outputs[0];
/* no tune played? */
if( !tunes[tms->tune_num] || tms->voices == 0 )
{
while (--samples >= 0)
buffer[samples] = 0;
return;
}
while( samples-- > 0 )
{
int sum = 0;
/* decay the twelve voices */
DECAY( 0) DECAY( 1) DECAY( 2) DECAY( 3) DECAY( 4) DECAY( 5)
DECAY( 6) DECAY( 7) DECAY( 8) DECAY( 9) DECAY(10) DECAY(11)
/* musical note timing */
tms->tune_counter -= tms->speed;
if( tms->tune_counter <= 0 )
{
int n = (-tms->tune_counter / samplerate) + 1;
tms->tune_counter += n * samplerate;
if( (tms->note_counter -= n) <= 0 )
{
tms->note_counter += VMAX;
if (tms->tune_ofs < tms->tune_max)
{
/* shift to the other 'bank' of voices */
tms->shift ^= 6;
/* restart one 'bank' of voices */
RESTART(0) RESTART(1) RESTART(2)
RESTART(3) RESTART(4) RESTART(5)
tms->tune_ofs++;
}
}
}
/* update the twelve voices */
TONE( 0) TONE( 1) TONE( 2) TONE( 3) TONE( 4) TONE( 5)
TONE( 6) TONE( 7) TONE( 8) TONE( 9) TONE(10) TONE(11)
*buffer++ = sum / tms->voices;
}
}
void tms36xx_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
{
int samplerate = m_samplerate;
stream_sample_t *buffer = outputs[0];
/* no tune played? */
if( !tunes[m_tune_num] || m_voices == 0 )
{
while (--samples >= 0)
buffer[samples] = 0;
return;
}
while( samples-- > 0 )
{
int sum = 0;
/* decay the twelve voices */
DECAY( 0) DECAY( 1) DECAY( 2) DECAY( 3) DECAY( 4) DECAY( 5)
DECAY( 6) DECAY( 7) DECAY( 8) DECAY( 9) DECAY(10) DECAY(11)
/* musical note timing */
m_tune_counter -= m_speed;
if( m_tune_counter <= 0 )
{
int n = (-m_tune_counter / samplerate) + 1;
m_tune_counter += n * samplerate;
if( (m_note_counter -= n) <= 0 )
{
m_note_counter += TMS36XX_VMAX;
if (m_tune_ofs < m_tune_max)
{
/* shift to the other 'bank' of voices */
m_shift ^= 6;
/* restart one 'bank' of voices */
RESTART(0) RESTART(1) RESTART(2)
RESTART(3) RESTART(4) RESTART(5)
m_tune_ofs++;
}
}
}
/* update the twelve voices */
TONE( 0) TONE( 1) TONE( 2) TONE( 3) TONE( 4) TONE( 5)
TONE( 6) TONE( 7) TONE( 8) TONE( 9) TONE(10) TONE(11)
*buffer++ = sum / m_voices;
}
}
/* Return the required voltage for a MIDI note number.
* If the note number is negative, IDLE_VOLTS will be returned.
* If the note number is out of range, it will be octave shifted
* into range. If the range of the synthesizer is less than one octave,
* and the note is not present in that octave, it will not be played. */
float note_voltage(int midinote){
if(midinote < 0)return IDLE_VOLTS;
if(midinote <= HIGH_MIDI &&
midinote >= LOW_MIDI){ /* Simple case - we can play the note as-is. */
return (midinote * M) + B;
} else { /* Complicated case - octave shifting is needed. */
#if ((HIGH_MIDI - LOW_MIDI) + 1) < 12
/* If the synthesizer cannot play a complete octave,
* notes that it cannot play will be ignored. */
if(TONE(midinote) >= TONE(LOW_MIDI) && TONE(midinote) <= TONE(HIGH_MIDI)){
midinote = LOW_MIDI - TONE(LOW_MIDI) + TONE(midinote);
return (midinote * M) + B;
} else {
return IDLE_VOLTS;
}
#else
/* If the synthesizer can play a complete octave (or more),
* notes that are too high will be shifted to the top of its
* range, and notes that are too low will be shifted to the bottom
* of its range. */
if(midinote > HIGH_MIDI){
if(TONE(midinote) > TONE(HIGH_MIDI)){
midinote = HIGH_MIDI - 12 - TONE(HIGH_MIDI) + TONE(midinote);
} else {
midinote = HIGH_MIDI - TONE(HIGH_MIDI) + TONE(midinote);
}
} else {
if(TONE(midinote) < TONE(LOW_MIDI)){
midinote = LOW_MIDI + 12 - TONE(LOW_MIDI) + TONE(midinote);
} else {
midinote = LOW_MIDI - TONE(LOW_MIDI) + TONE(midinote);
}
}
return (midinote * M) + B;
#endif
}
}
