ref: da054584cd20bb9147d3fbc5d281490df6e0fd99
dir: /src/pt2_paula.h/
#pragma once #include <stdint.h> #include <stdbool.h> #include "pt2_header.h" typedef struct voice_t { volatile bool DMA_active; // internal values (don't modify directly!) bool DMATriggerFlag, nextSampleStage; int8_t AUD_DAT[2]; // DMA data buffer const int8_t *location; // current location uint16_t lengthCounter; // current length int32_t sampleCounter; // how many bytes left in AUD_DAT double dSample; // current sample point // registers modified by Paula functions const int8_t *AUD_LC; // location uint16_t AUD_LEN; // length (in words) double AUD_PER_delta, AUD_PER_deltamul; // delta double AUD_VOL; // volume double dDelta, dPhase; // for BLEP synthesis double dLastDelta, dLastPhase, dLastDeltaMul, dBlepOffset, dDeltaMul; // used for pt2_sync.c (visualizers) uint8_t syncFlags; uint8_t syncVolume; int32_t syncPeriod; int32_t syncTriggerLength; const int8_t *syncTriggerData; } paulaVoice_t; #define PAULA_VOICES 4 #define PAULA_PAL_CLK AMIGA_PAL_CCK_HZ #define PAL_PAULA_MIN_PERIOD 113 #define PAL_PAULA_MIN_SAFE_PERIOD 124 #define PAL_PAULA_MAX_HZ (PAULA_PAL_CLK / (double)PAL_PAULA_MIN_PERIOD) #define PAL_PAULA_MAX_SAFE_HZ (PAULA_PAL_CLK / (double)PAL_PAULA_MIN_SAFE_PERIOD) void paulaSetOutputFrequency(double dAudioFreq, bool oversampling2x); void paulaSetDMACON(uint16_t bits); // $DFF096 register write (only controls paula DMA) void paulaSetPeriod(int32_t ch, uint16_t period); void paulaSetVolume(int32_t ch, uint16_t vol); void paulaSetLength(int32_t ch, uint16_t len); void paulaSetData(int32_t ch, const int8_t *src); void paulaGenerateSamples(double *dOutL, double *dOutR, int32_t numSamples); extern paulaVoice_t paula[PAULA_VOICES]; // pt2_paula.c