长度计算

private int krcCalculateLength() {
				long offset = System.currentTimeMillis() - startTime;
				if (offset >= Krc.timeSizes[Krc.timeSizes.length - 1]) {
					offset = Krc.timeSizes[Krc.timeSizes.length - 1];
				}
				int i = 0;
				for (; offset < Krc.timeSizes[Krc.timeSizes.length - 1]
						&& offset > Krc.timeSizes[i + 1]; i++) {
					;
				}
				if (offset >= Krc.timeSizes[Krc.timeSizes.length - 1]) {
					i = Krc.timeSizes.length - 1;
				}

				int length = 0;
				for (int j = 0; j < i; j++) {
					length += Krc.totals[i];
				}
				System.out.println(offset - Krc.timeSizes[i]);
				int l = (int) (((double) offset - Krc.timeSizes[i])
						/ (Krc.timeSizes[i + 1] - Krc.timeSizes[i]) * Krc.totals[i]);

				return length + l;
			}