WutAudioDriver.h

/****************************************************************************
 * Platform Abstraction Layer (WUT driver)
 * Daryl Borth 2026
 * WutAudioDriver.h
 ***************************************************************************/
#pragma once
 
#include <stdint.h>
#include <sndcore2/core.h>
#include <sndcore2/voice.h>
#include "../AudioDriver.h"
#include "../../libgui/GuiSoundOggPlayer.h"

class WutAudioDriver : public AudioDriver
{
    public:
        void init() override;
        void start() override;
        void stop() override;
        void shutdown() override;
 
        int32_t playVoice(const uint8_t* data, int32_t length, int volume) override;
        void stopVoice(int32_t voice) override;
        void pauseVoice(int32_t voice) override;
        void resumeVoice(int32_t voice) override;
        bool isVoicePlaying(int32_t voice) override;
        void setVoiceVolume(int32_t voice, int volume) override;
 
        void playStream(const uint8_t* data, int32_t length, bool loop, int volume) override;
        void stopStream() override;
        void pauseStream() override;
        void resumeStream() override;
        bool isStreamPlaying() override;
        void setStreamVolume(int volume) override;

        void handleStreamCallback();
 
    private:
        struct WutVoiceSlot {
            AXVoice* voice;
            bool active;
        };
 
        GuiSoundOggPlayer oggPlayer;
        WutVoiceSlot voices[16];
        int nextVoiceSlot;
 
        AXVoice* streamVoiceL;
        AXVoice* streamVoiceR;
 
        // Circular Ring Buffer (16,384 samples = 32KB per channel)
        static const uint32_t STREAM_BUFFER_SAMPLES = 16384;
        alignas(32) int16_t streamBufL[STREAM_BUFFER_SAMPLES];
        alignas(32) int16_t streamBufR[STREAM_BUFFER_SAMPLES];
 
        uint32_t writeOffset;
        bool eofSilenceWritten;
        int streamVolume;
};