int VorbisfileUser::fillBuffer(char *fillbuffer, int fillbufferLength)
{
	if((pcmLeft == 0)
	&& (bufferLeft == 0)) {
		//	もう圧縮データも残ってない
		ZeroMemory((LPVOID)fillbuffer, fillbufferLength) ;
		return 0 ;
	}

	int filledLength = 0 ;
	while(fillbufferLength > 0) {
		long readBytes ;
		readBytes = ov_read(&ovFile, fillbuffer, fillbufferLength, 0, 2, 1, NULL) ;
		if((readBytes == OV_HOLE)
		|| (readBytes == OV_EBADLINK)) {
			MessageBox(NULL, "Ogg Vorbisファイルが壊れているようです。", "VorbisfileUser class error", MB_OK|MB_ICONEXCLAMATION) ;
			ov_clear(&ovFile) ;
			info = NULL ;
			throw 0 ;
		}
		if(readBytes == 0) {
			//	残りは無いらしい
			pcmLeft = 0 ;
			ZeroMemory((LPVOID)fillbuffer, fillbufferLength) ;
			return filledLength ;
		}
		filledLength += readBytes ;
		fillbufferLength -= readBytes ;
		fillbuffer += readBytes ;
		pcmLeft -= readBytes ;
		if(pcmLeft <= 0) {
			pcmLeft = 0 ;
		}
	}

	return filledLength ;
}