spu.hh

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/*
 
MIT License
 
Copyright (c) 2024 PCSX-Redux authors
 
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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furnished to do so, subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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SOFTWARE.
 
*/
 
#pragma once
 
#include <EASTL/functional.h>
 
#include "psyqo/fixed-point.hh"
#include "psyqo/kernel.hh"
 
namespace psyqo {
 
class SPU {
  public:
    static constexpr uint32_t SOUND_RAM_SIZE = 512 * 1024;
 
    static constexpr size_t ADPCM_BLOCK_SIZE = 16;
 
    static constexpr size_t MAX_DMA_BLOCK_SIZE = 16 * sizeof(uint32_t);
 
    static void initialize();
 
    void initAsync();
 
    static void silenceChannels(uint32_t channelMask);
 
    static void dmaWrite(uint32_t spuAddress, const void* ramAddress, size_t dataSize, size_t blockSize = 0);
 
    void dmaWrite(uint32_t spuAddress, const void* ramAddress, size_t dataSize, eastl::function<void()>&& callback,
                  DMA::DmaCallback dmaCallback = DMA::FROM_MAIN_LOOP);
 
    struct ChannelPlaybackConfig {
        FixedPoint<12, uint16_t> sampleRate;
        uint16_t volumeLeft, volumeRight;
        uint32_t adsr;
    };
 
    static void playADPCM(uint8_t channelId, uint32_t spuRamAddress, const ChannelPlaybackConfig& config, bool hardCut);
    static uint32_t getNextFreeChannel();
 
    static constexpr uint32_t NO_FREE_CHANNEL = 0xffffffff;
    static constexpr uint32_t BASE_SAMPLE_RATE = 44100;
    static constexpr uint16_t BASE_ALLOC_ADDR = 0x1010;
 
  private:
    eastl::function<void()> m_dmaCallback = nullptr;
    unsigned m_dmaEventSlot = 0;
    bool m_transferPending = false;
    bool m_fromISR = false;
    bool m_initialized = false;
};
 
}  // namespace psyqo