Method Decode

Source/HLEAudio/ABI3mp3.cpp:583–626

void CMP3Decode::Decode( AudioHLECommand command )
{
	// Initialization Code
	u32 readPtr; // s5
	u32 writePtr; // s6
	//const u32 Count = 0x0480; // s4
	u32 tmp;
	//u32 inPtr, outPtr;

	t6 = 0x08A0; // I think these are temporary storage buffers
	t5 = 0x0AC0;
	t4 = (command.cmd0 & 0x1E);

	writePtr = command.cmd1 & 0xFFFFFF;
	readPtr  = writePtr;
	memmove(mp3data+0xCE8, rdram+readPtr, 8); // Just do that for efficiency... may remove and use directly later anyway
	readPtr += 8; // This must be a header byte or whatnot

	for (u32 cnt = 0; cnt < 0x0480; cnt += 0x180)
	{
		memmove(mp3data+0xCF0, rdram+readPtr, 0x180); // DMA: 0xCF0 <- RDRAM[s5] : 0x180
		inPtr  = 0xCF0; // s7
		outPtr = 0xE70; // s3

		for (int cnt2 = 0; cnt2 < 0x180; cnt2 += 0x40)
		{
			t6 &= 0xFFE0;
			t5 &= 0xFFE0;
			t6 |= t4;
			t5 |= t4;
			InnerLoop();
			t4 = (t4-2)&0x1E;
			tmp = t6;
			t6 = t5;
			t5 = tmp;
			//outPtr += 0x40;
			inPtr += 0x40;
		}

		memmove(rdram+writePtr, mp3data+0xe70, 0x180);
		writePtr += 0x180;
		readPtr  += 0x180;
	}
}


CMP3Decode		gMP3Decode;