124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/* Copyright (c) 2013-2016 Jeffrey Pfau
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef GBA_AUDIO_H
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#define GBA_AUDIO_H
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#include <mgba-util/common.h>
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CXX_GUARD_START
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#include <mgba/core/log.h>
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#include <mgba/internal/gb/audio.h>
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#include <mgba-util/circle-buffer.h>
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mLOG_DECLARE_CATEGORY(GBA_AUDIO);
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struct GBADMA;
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extern const unsigned GBA_AUDIO_SAMPLES;
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extern const int GBA_AUDIO_VOLUME_MAX;
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struct GBAAudioFIFO {
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struct CircleBuffer fifo;
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int dmaSource;
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int8_t sample;
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};
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DECL_BITFIELD(GBARegisterSOUNDCNT_HI, uint16_t);
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DECL_BITS(GBARegisterSOUNDCNT_HI, Volume, 0, 2);
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DECL_BIT(GBARegisterSOUNDCNT_HI, VolumeChA, 2);
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DECL_BIT(GBARegisterSOUNDCNT_HI, VolumeChB, 3);
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DECL_BIT(GBARegisterSOUNDCNT_HI, ChARight, 8);
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DECL_BIT(GBARegisterSOUNDCNT_HI, ChALeft, 9);
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DECL_BIT(GBARegisterSOUNDCNT_HI, ChATimer, 10);
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DECL_BIT(GBARegisterSOUNDCNT_HI, ChAReset, 11);
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DECL_BIT(GBARegisterSOUNDCNT_HI, ChBRight, 12);
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DECL_BIT(GBARegisterSOUNDCNT_HI, ChBLeft, 13);
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DECL_BIT(GBARegisterSOUNDCNT_HI, ChBTimer, 14);
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DECL_BIT(GBARegisterSOUNDCNT_HI, ChBReset, 15);
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DECL_BITFIELD(GBARegisterSOUNDBIAS, uint16_t);
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DECL_BITS(GBARegisterSOUNDBIAS, Bias, 0, 10);
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DECL_BITS(GBARegisterSOUNDBIAS, Resolution, 14, 2);
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struct GBAAudio {
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struct GBA* p;
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struct GBAudio psg;
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struct GBAAudioFIFO chA;
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struct GBAAudioFIFO chB;
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int16_t lastLeft;
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int16_t lastRight;
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int clock;
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uint8_t volume;
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bool volumeChA;
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bool volumeChB;
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bool chARight;
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bool chALeft;
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bool chATimer;
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bool chBRight;
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bool chBLeft;
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bool chBTimer;
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bool enable;
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size_t samples;
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unsigned sampleRate;
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GBARegisterSOUNDBIAS soundbias;
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int32_t sampleInterval;
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bool forceDisableChA;
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bool forceDisableChB;
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int masterVolume;
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struct mTimingEvent sampleEvent;
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};
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struct GBAStereoSample {
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int16_t left;
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int16_t right;
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};
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void GBAAudioInit(struct GBAAudio* audio, size_t samples);
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void GBAAudioReset(struct GBAAudio* audio);
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void GBAAudioDeinit(struct GBAAudio* audio);
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void GBAAudioResizeBuffer(struct GBAAudio* audio, size_t samples);
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void GBAAudioScheduleFifoDma(struct GBAAudio* audio, int number, struct GBADMA* info);
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void GBAAudioWriteSOUND1CNT_LO(struct GBAAudio* audio, uint16_t value);
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void GBAAudioWriteSOUND1CNT_HI(struct GBAAudio* audio, uint16_t value);
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void GBAAudioWriteSOUND1CNT_X(struct GBAAudio* audio, uint16_t value);
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void GBAAudioWriteSOUND2CNT_LO(struct GBAAudio* audio, uint16_t value);
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void GBAAudioWriteSOUND2CNT_HI(struct GBAAudio* audio, uint16_t value);
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void GBAAudioWriteSOUND3CNT_LO(struct GBAAudio* audio, uint16_t value);
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void GBAAudioWriteSOUND3CNT_HI(struct GBAAudio* audio, uint16_t value);
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void GBAAudioWriteSOUND3CNT_X(struct GBAAudio* audio, uint16_t value);
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void GBAAudioWriteSOUND4CNT_LO(struct GBAAudio* audio, uint16_t value);
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void GBAAudioWriteSOUND4CNT_HI(struct GBAAudio* audio, uint16_t value);
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void GBAAudioWriteSOUNDCNT_LO(struct GBAAudio* audio, uint16_t value);
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void GBAAudioWriteSOUNDCNT_HI(struct GBAAudio* audio, uint16_t value);
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void GBAAudioWriteSOUNDCNT_X(struct GBAAudio* audio, uint16_t value);
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void GBAAudioWriteSOUNDBIAS(struct GBAAudio* audio, uint16_t value);
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void GBAAudioWriteWaveRAM(struct GBAAudio* audio, int address, uint32_t value);
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void GBAAudioWriteFIFO(struct GBAAudio* audio, int address, uint32_t value);
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void GBAAudioSampleFIFO(struct GBAAudio* audio, int fifoId, int32_t cycles);
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struct GBASerializedState;
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void GBAAudioSerialize(const struct GBAAudio* audio, struct GBASerializedState* state);
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void GBAAudioDeserialize(struct GBAAudio* audio, const struct GBASerializedState* state);
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float GBAAudioCalculateRatio(float inputSampleRate, float desiredFPS, float desiredSampleRatio);
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CXX_GUARD_END
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#endif
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