68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
//
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// Created by Wouter Groeneveld on 07/08/18.
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//
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#ifndef GBA_SPRITE_ENGINE_SOUND_H
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#define GBA_SPRITE_ENGINE_SOUND_H
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#include <libgba-bitmap-engine/gba/tonc_types.h>
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#include <libgba-bitmap-engine/gba/tonc_memdef.h>
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#include <memory>
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#include <libgba-bitmap-engine/gba/tonc_memmap.h>
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#define CLOCK 16777216
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#define CYCLES_PER_BLANK 280806
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#define OVERFLOW_16_BIT_VALUE 65536
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#define DISPLAY_INTERRUPT_VBLANK_ENABLE 0x08
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#define INTERRUPT_VBLANK 0x1
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#define DMA_SYNC_TO_TIMER 0x30000000
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#define IRQ_CALLBACK ((volatile unsigned int*) 0x3007FFC)
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enum SoundChannel {
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ChannelA, ChannelB
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};
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class SoundControl {
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private:
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vu32* DMAControl; // ex. ®_DMA1CNT
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vu32* DMASourceAddress; // ex. ®_DMA1SAD
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vu32* DMADestinationAddress; // ex. ®_DMA1DAD
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vu32* FiFoBuffer; // ex. ®_FIFOA
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u16 controlFlags;
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u32 vblanksRemaning; // updated each vblank, counts down to 0
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u32 vblanksTotal; // calculated once when enqueueing
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const void* data;
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public:
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SoundControl(vu32* dma, vu32* src, vu32* dest, vu32* fifo, u16 flags)
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: DMAControl(dma), DMASourceAddress(src), DMADestinationAddress(dest), FiFoBuffer(fifo), controlFlags(flags), vblanksRemaning(0), vblanksTotal(0) {}
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u16 getControlFlags() { return controlFlags; }
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u32 getVBlanksRemaning() { return vblanksRemaning; }
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void reset();
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void step() { vblanksRemaning--; }
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bool done() { return vblanksRemaning <= 0; }
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u32 getVBlanksTotal() { return vblanksTotal; }
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void disable() {
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*(DMAControl) = 0;
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vblanksRemaning = 0;
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REG_SNDDSCNT &= ~(controlFlags);
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};
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void enable() {
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*DMAControl = DMA_DST_FIXED | DMA_REPEAT | DMA_32 | DMA_SYNC_TO_TIMER | DMA_ENABLE;
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};
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void accept(const void* data, int totalSamples, int ticksPerSample);
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static std::unique_ptr<SoundControl> channelAControl();
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static std::unique_ptr<SoundControl> channelBControl();
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static std::unique_ptr<SoundControl> soundControl(SoundChannel channel) {
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return channel == ChannelA ? channelAControl() : channelBControl();
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};
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};
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#endif //GBA_SPRITE_ENGINE_SOUND_H
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