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#ifndef MYON_PPZ8_H_INCLUDED
#define MYON_PPZ8_H_INCLUDED
#include <stdint.h>
#include <stdbool.h>
#ifdef __cplusplus
extern "C" {
#endif
struct ppz8_pcmvoice {
uint32_t start;
uint32_t len;
uint32_t loopstart;
uint32_t loopend;
uint16_t origfreq;
};
struct ppz8_pcmbuf {
int16_t *data;
uint32_t buflen;
struct ppz8_pcmvoice voice[128];
};
struct ppz8_channel {
uint64_t ptr;
uint64_t loopstartptr;
uint64_t loopendptr;
uint64_t endptr;
uint32_t freq;
uint32_t loopstartoff;
uint32_t loopendoff;
int16_t prevout[2];
uint8_t vol;
uint8_t pan;
uint8_t voice;
bool playing;
};
struct ppz8 {
struct ppz8_pcmbuf buf[2];
struct ppz8_channel channel[8];
uint16_t srate;
uint8_t totalvol;
uint16_t mix_volume;
};
void ppz8_init(struct ppz8 *ppz8, uint16_t srate, uint16_t mix_volume);
void ppz8_mix(struct ppz8 *ppz8, int16_t *buf, unsigned samples);
bool ppz8_pvi_load(struct ppz8 *ppz8, uint8_t buf,
const uint8_t *pvidata, uint32_t pvidatalen,
int16_t *decodebuf);
static inline uint32_t ppz8_pvi_decodebuf_samples(uint32_t pvidatalen) {
if (pvidatalen < 0x210) return 0;
return (pvidatalen - 0x210) * 2;
}
struct ppz8_functbl {
void (*channel_play)(struct ppz8 *ppz8, uint8_t channel, uint8_t voice);
void (*channel_stop)(struct ppz8 *ppz8, uint8_t channel);
void (*channel_volume)(struct ppz8 *ppz8, uint8_t channel, uint8_t vol);
void (*channel_freq)(struct ppz8 *ppz8, uint8_t channel, uint32_t freq);
void (*channel_loopoffset)(struct ppz8 *ppz8, uint8_t channel,
uint32_t startoff, uint32_t endoff);
void (*channel_pan)(struct ppz8 *ppz8, uint8_t channel, uint8_t pan);
void (*total_volume)(struct ppz8 *ppz8, uint8_t vol);
};
extern const struct ppz8_functbl ppz8_functbl;
#ifdef __cplusplus
}
#endif
#endif // MYON_PPZ8_H_INCLUDED
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