mirror of
https://github.com/italicsjenga/agb.git
synced 2024-12-26 09:41:34 +11:00
258 lines
6.6 KiB
C
258 lines
6.6 KiB
C
/* Copyright (c) 2013-2016 Jeffrey Pfau
|
|
*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
#ifndef GB_AUDIO_H
|
|
#define GB_AUDIO_H
|
|
|
|
#include <mgba-util/common.h>
|
|
|
|
CXX_GUARD_START
|
|
|
|
#include <mgba/core/timing.h>
|
|
|
|
DECL_BITFIELD(GBAudioRegisterDuty, uint8_t);
|
|
DECL_BITS(GBAudioRegisterDuty, Length, 0, 6);
|
|
DECL_BITS(GBAudioRegisterDuty, Duty, 6, 2);
|
|
|
|
DECL_BITFIELD(GBAudioRegisterSweep, uint8_t);
|
|
DECL_BITS(GBAudioRegisterSweep, StepTime, 0, 3);
|
|
DECL_BIT(GBAudioRegisterSweep, Direction, 3);
|
|
DECL_BITS(GBAudioRegisterSweep, InitialVolume, 4, 4);
|
|
|
|
DECL_BITFIELD(GBAudioRegisterControl, uint16_t);
|
|
DECL_BITS(GBAudioRegisterControl, Rate, 0, 11);
|
|
DECL_BITS(GBAudioRegisterControl, Frequency, 0, 11);
|
|
DECL_BIT(GBAudioRegisterControl, Stop, 14);
|
|
DECL_BIT(GBAudioRegisterControl, Restart, 15);
|
|
|
|
DECL_BITFIELD(GBAudioRegisterSquareSweep, uint8_t);
|
|
DECL_BITS(GBAudioRegisterSquareSweep, Shift, 0, 3);
|
|
DECL_BIT(GBAudioRegisterSquareSweep, Direction, 3);
|
|
DECL_BITS(GBAudioRegisterSquareSweep, Time, 4, 3);
|
|
|
|
DECL_BITFIELD(GBAudioRegisterBank, uint8_t);
|
|
DECL_BIT(GBAudioRegisterBank, Size, 5);
|
|
DECL_BIT(GBAudioRegisterBank, Bank, 6);
|
|
DECL_BIT(GBAudioRegisterBank, Enable, 7);
|
|
|
|
DECL_BITFIELD(GBAudioRegisterBankVolume, uint8_t);
|
|
DECL_BITS(GBAudioRegisterBankVolume, VolumeGB, 5, 2);
|
|
DECL_BITS(GBAudioRegisterBankVolume, VolumeGBA, 5, 3);
|
|
|
|
DECL_BITFIELD(GBAudioRegisterNoiseFeedback, uint8_t);
|
|
DECL_BITS(GBAudioRegisterNoiseFeedback, Ratio, 0, 3);
|
|
DECL_BIT(GBAudioRegisterNoiseFeedback, Power, 3);
|
|
DECL_BITS(GBAudioRegisterNoiseFeedback, Frequency, 4, 4);
|
|
|
|
DECL_BITFIELD(GBAudioRegisterNoiseControl, uint8_t);
|
|
DECL_BIT(GBAudioRegisterNoiseControl, Stop, 6);
|
|
DECL_BIT(GBAudioRegisterNoiseControl, Restart, 7);
|
|
|
|
DECL_BITFIELD(GBRegisterNR50, uint8_t);
|
|
DECL_BITS(GBRegisterNR50, VolumeRight, 0, 3);
|
|
DECL_BITS(GBRegisterNR50, VolumeLeft, 4, 3);
|
|
|
|
DECL_BITFIELD(GBRegisterNR51, uint8_t);
|
|
DECL_BIT(GBRegisterNR51, Ch1Right, 0);
|
|
DECL_BIT(GBRegisterNR51, Ch2Right, 1);
|
|
DECL_BIT(GBRegisterNR51, Ch3Right, 2);
|
|
DECL_BIT(GBRegisterNR51, Ch4Right, 3);
|
|
DECL_BIT(GBRegisterNR51, Ch1Left, 4);
|
|
DECL_BIT(GBRegisterNR51, Ch2Left, 5);
|
|
DECL_BIT(GBRegisterNR51, Ch3Left, 6);
|
|
DECL_BIT(GBRegisterNR51, Ch4Left, 7);
|
|
|
|
DECL_BITFIELD(GBAudioEnable, uint8_t);
|
|
DECL_BIT(GBAudioEnable, PlayingCh1, 0);
|
|
DECL_BIT(GBAudioEnable, PlayingCh2, 1);
|
|
DECL_BIT(GBAudioEnable, PlayingCh3, 2);
|
|
DECL_BIT(GBAudioEnable, PlayingCh4, 3);
|
|
DECL_BIT(GBAudioEnable, Enable, 7);
|
|
|
|
struct GB;
|
|
struct GBAudioEnvelope {
|
|
int length;
|
|
int duty;
|
|
int stepTime;
|
|
int initialVolume;
|
|
int currentVolume;
|
|
bool direction;
|
|
int dead;
|
|
int nextStep;
|
|
};
|
|
|
|
struct GBAudioSquareControl {
|
|
int frequency;
|
|
int length;
|
|
bool stop;
|
|
int hi;
|
|
};
|
|
|
|
struct GBAudioSweep {
|
|
int shift;
|
|
int time;
|
|
int step;
|
|
bool direction;
|
|
bool enable;
|
|
bool occurred;
|
|
int realFrequency;
|
|
};
|
|
|
|
struct GBAudioSquareChannel {
|
|
struct GBAudioSweep sweep;
|
|
struct GBAudioEnvelope envelope;
|
|
struct GBAudioSquareControl control;
|
|
int8_t sample;
|
|
};
|
|
|
|
struct GBAudioWaveChannel {
|
|
bool size;
|
|
bool bank;
|
|
bool enable;
|
|
|
|
unsigned length;
|
|
int volume;
|
|
|
|
int rate;
|
|
bool stop;
|
|
|
|
int window;
|
|
bool readable;
|
|
union {
|
|
uint32_t wavedata32[8];
|
|
uint8_t wavedata8[16];
|
|
};
|
|
int8_t sample;
|
|
};
|
|
|
|
struct GBAudioNoiseChannel {
|
|
struct GBAudioEnvelope envelope;
|
|
|
|
int ratio;
|
|
int frequency;
|
|
bool power;
|
|
bool stop;
|
|
int length;
|
|
|
|
uint32_t lfsr;
|
|
int nSamples;
|
|
int samples;
|
|
uint32_t lastEvent;
|
|
|
|
int8_t sample;
|
|
};
|
|
|
|
enum GBAudioStyle {
|
|
GB_AUDIO_DMG,
|
|
GB_AUDIO_MGB = GB_AUDIO_DMG, // TODO
|
|
GB_AUDIO_CGB,
|
|
GB_AUDIO_AGB, // GB in GBA
|
|
GB_AUDIO_GBA, // GBA PSG
|
|
};
|
|
|
|
struct GBAudio {
|
|
struct GB* p;
|
|
struct mTiming* timing;
|
|
unsigned timingFactor;
|
|
struct GBAudioSquareChannel ch1;
|
|
struct GBAudioSquareChannel ch2;
|
|
struct GBAudioWaveChannel ch3;
|
|
struct GBAudioNoiseChannel ch4;
|
|
|
|
struct blip_t* left;
|
|
struct blip_t* right;
|
|
int16_t lastLeft;
|
|
int16_t lastRight;
|
|
int32_t capLeft;
|
|
int32_t capRight;
|
|
int clock;
|
|
int32_t clockRate;
|
|
|
|
uint8_t volumeRight;
|
|
uint8_t volumeLeft;
|
|
bool ch1Right;
|
|
bool ch2Right;
|
|
bool ch3Right;
|
|
bool ch4Right;
|
|
bool ch1Left;
|
|
bool ch2Left;
|
|
bool ch3Left;
|
|
bool ch4Left;
|
|
|
|
bool playingCh1;
|
|
bool playingCh2;
|
|
bool playingCh3;
|
|
bool playingCh4;
|
|
uint8_t* nr52;
|
|
|
|
int frame;
|
|
bool skipFrame;
|
|
|
|
int32_t sampleInterval;
|
|
enum GBAudioStyle style;
|
|
|
|
struct mTimingEvent frameEvent;
|
|
struct mTimingEvent ch1Event;
|
|
struct mTimingEvent ch2Event;
|
|
struct mTimingEvent ch3Event;
|
|
struct mTimingEvent ch3Fade;
|
|
struct mTimingEvent ch4Event;
|
|
struct mTimingEvent sampleEvent;
|
|
bool enable;
|
|
|
|
size_t samples;
|
|
bool forceDisableCh[4];
|
|
int masterVolume;
|
|
};
|
|
|
|
void GBAudioInit(struct GBAudio* audio, size_t samples, uint8_t* nr52, enum GBAudioStyle style);
|
|
void GBAudioDeinit(struct GBAudio* audio);
|
|
void GBAudioReset(struct GBAudio* audio);
|
|
|
|
void GBAudioResizeBuffer(struct GBAudio* audio, size_t samples);
|
|
|
|
void GBAudioWriteNR10(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR11(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR12(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR13(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR14(struct GBAudio* audio, uint8_t);
|
|
|
|
void GBAudioWriteNR21(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR22(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR23(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR24(struct GBAudio* audio, uint8_t);
|
|
|
|
void GBAudioWriteNR30(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR31(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR32(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR33(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR34(struct GBAudio* audio, uint8_t);
|
|
|
|
void GBAudioWriteNR41(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR42(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR43(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR44(struct GBAudio* audio, uint8_t);
|
|
|
|
void GBAudioWriteNR50(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR51(struct GBAudio* audio, uint8_t);
|
|
void GBAudioWriteNR52(struct GBAudio* audio, uint8_t);
|
|
|
|
void GBAudioUpdateFrame(struct GBAudio* audio);
|
|
void GBAudioUpdateChannel4(struct GBAudio* audio);
|
|
|
|
void GBAudioSamplePSG(struct GBAudio* audio, int16_t* left, int16_t* right);
|
|
|
|
struct GBSerializedPSGState;
|
|
void GBAudioPSGSerialize(const struct GBAudio* audio, struct GBSerializedPSGState* state, uint32_t* flagsOut);
|
|
void GBAudioPSGDeserialize(struct GBAudio* audio, const struct GBSerializedPSGState* state, const uint32_t* flagsIn);
|
|
|
|
struct GBSerializedState;
|
|
void GBAudioSerialize(const struct GBAudio* audio, struct GBSerializedState* state);
|
|
void GBAudioDeserialize(struct GBAudio* audio, const struct GBSerializedState* state);
|
|
|
|
CXX_GUARD_END
|
|
|
|
#endif
|