1 files changed, 76 insertions, 0 deletions
diff --git a/fmdriver/ppz8.h b/fmdriver/ppz8.h
new file mode 100644
index 0000000..6ced669
--- /dev/null
+++ b/fmdriver/ppz8.h
@@ -0,0 +1,76 @@
+#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