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#include "opna.h"
#ifdef LIBOPNA_ENABLE_OSCILLO
#include "oscillo/oscillo.h"
#endif
#include <string.h>
void opna_reset(struct opna *opna) {
opna_fm_reset(&opna->fm);
opna_ssg_reset(&opna->ssg);
opna_ssg_resampler_reset(&opna->resampler);
opna_drum_reset(&opna->drum);
opna_adpcm_reset(&opna->adpcm);
opna->mask = 0;
opna->generated_frames = 0;
}
void opna_writereg(struct opna *opna, unsigned reg, unsigned val) {
val &= 0xff;
opna_fm_writereg(&opna->fm, reg, val);
opna_ssg_writereg(&opna->ssg, reg, val);
opna_drum_writereg(&opna->drum, reg, val);
opna_adpcm_writereg(&opna->adpcm, reg, val);
}
unsigned opna_readreg(const struct opna *opna, unsigned reg) {
if (reg > 0xfu) return 0xff;
return opna_ssg_readreg(&opna->ssg, reg);
}
void opna_mix(struct opna *opna, int16_t *buf, unsigned samples) {
opna_mix_oscillo(opna, buf, samples, 0);
}
void opna_mix_oscillo(struct opna *opna, int16_t *buf, unsigned samples, struct oscillodata *oscillo) {
#ifdef LIBOPNA_ENABLE_OSCILLO
if (oscillo) {
for (int i = 0; i < LIBOPNA_OSCILLO_TRACK_COUNT; i++) {
memmove(&oscillo[i].buf[0],
&oscillo[i].buf[samples],
(OSCILLO_SAMPLE_COUNT - samples)*sizeof(oscillo[i].buf[0]));
}
}
unsigned offset = OSCILLO_SAMPLE_COUNT - samples;
struct oscillodata *oscillofm = oscillo ? &oscillo[0] : 0;
struct oscillodata *oscillossg = oscillo ? &oscillo[6] : 0;
#else
(void)oscillo;
struct oscillodata *oscillofm = 0, *oscillossg = 0;
unsigned offset = 0;
#endif
opna_fm_mix(&opna->fm, buf, samples, oscillofm, offset);
opna_ssg_mix_55466(&opna->ssg, &opna->resampler, buf, samples,
oscillossg, offset);
opna_drum_mix(&opna->drum, buf, samples);
opna_adpcm_mix(&opna->adpcm, buf, samples);
opna->generated_frames += samples;
}
unsigned opna_get_mask(const struct opna *opna) {
return opna->mask;
}
void opna_set_mask(struct opna *opna, unsigned mask) {
opna->mask = mask & 0xffffu;
opna->fm.mask = mask & ((1<<(6+1))-1);
opna->ssg.mask = (mask >> 6) & ((1<<(3+1))-1);
opna->adpcm.masked = mask & LIBOPNA_CHAN_ADPCM;
opna->drum.mask = (mask >> 9) & ((1<<(6+1))-1);
}
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