Porting complex native software to the modern browser.

void SoundDevice_WritePCM(void* sndBuffer, short* samples, int count) {
    void *p1, *p2;
    DWORD b1, b2;
    LPDIRECTSOUNDBUFFER dsb = (LPDIRECTSOUNDBUFFER)sndBuffer;

    // Lock cyclic audio hardware ring
    dsb->Lock(g_playCursor, count * 4, &p1, &b1, &p2, &b2, 0);
    memcpy(p1, samples, b1);
    if (p2) memcpy(p2, (char*)samples + b1, b2);
    dsb->Unlock(p1, b1, p2, b2);
}

class GameAudioWorklet extends AudioWorkletProcessor {
  process(inputs, outputs) {
    const outL = outputs[0][0];
    const outR = outputs[0][1];
    
    // Pull 128 quantum frames from lock-free ring buffer
    for (let i = 0; i < outL.length; i++) {
      outL[i] = this.ringBuffer.readSample(0);
      outR[i] = this.ringBuffer.readSample(1);
    }
    return true;
  }
}

FILE* AssetManager_Open(const char* path) {
    char resolved[260];
    snprintf(resolved, 260, "data/%s", path);
    
    // Blocking native OS system call
    FILE* fp = fopen(resolved, "rb");
    if (!fp) {
        printf("Missing archive: %s\n", path);
        return NULL;
    }
    return fp;
}

class VirtualFileSystem {
  private index = new Map<string, Uint8Array>();

  fopenSync(path: string): VFSHandle | null {
    const canonical = path.replace(/\\/g, '/').toLowerCase();
    const buffer = this.index.get(canonical);
    if (!buffer) return null;
    
    // Returns instant zero-overhead view into WASM memory
    return new VFSHandle(buffer);
  }
}