Question

我尝试运行时收到以下消息（adpcm_encoder）。

??? Maximum recursion limit of 500 reached. Use set(0,'RecursionLimit',N)
to change the limit. Be aware that exceeding your available stack space can
crash MATLAB and/or your computer.

Error in ==> fileparts

我在很多网站都搜索过这个问题，但我找不到具体的解决方案。

代码是：

function adpcm_y = adpcm_encoder(raw_y)



Y = wavread('two.wav');
Y_en = adpcm_encoder(Y);


IndexTable = [-1, -1, -1, -1, 2, 4, 6, 8, -1, -1, -1, -1, 2, 4, 6, 8];

StepSizeTable = [7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 19, 21, 23, 25, 28, 31, 34, 37, 41, 45, 50, 55, 60, 66, 73, 80, 88, 97, 107, 118, 130, 143, 157, 173, 190, 209, 230, 253, 279, 307, 337, 371, 408, 449, 494, 544, 598, 658, 724, 796, 876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066, 2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358, 5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899, 15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767];

prevsample = 0;
previndex = 1;

Ns = length(raw_y);
n = 1;

raw_y = 32767 * raw_y;          % 16-bit operation

while (n <= Ns)
predsample = prevsample;
index = previndex;
step = StepSizeTable(index);

diff = raw_y(n) - predsample;
if (diff >= 0)
    code = 0;
else
    code = 8;
    diff = -diff;
end

tempstep = step;
if (diff >= tempstep)
    code = bitor(code, 4);
    diff = diff - tempstep;
end
tempstep = bitshift(tempstep, -1);
if (diff >= tempstep)
    code = bitor(code, 2);
    diff = diff - tempstep;
end
tempstep = bitshift(tempstep, -1);
if (diff >= tempstep)
    code = bitor(code, 1);
end

diffq = bitshift(step, -3);
if (bitand(code, 4))
    diffq = diffq + step;
end
if (bitand(code, 2))
    diffq = diffq + bitshift(step, -1);
end
if (bitand(code, 1))
    diffq = diffq + bitshift(step, -2);
end

if (bitand(code, 8))
    predsample = predsample - diffq;
else
    predsample = predsample + diffq;
end

if (predsample > 32767)
    predsample = 32767;
elseif (predsample < -32768)
    predsample = -32768;
end

index = index + IndexTable(code+1);

if (index < 1)
    index = 1;
end
if (index > 89)
    index = 89;
end

prevsample = predsample;
previndex = index;

adpcm_y(n) = bitand(code, 15);
%adpcm_y(n) = code;
n = n + 1;
end

Answer 1

这种情况正在发生，因为你有一个函数可以递归调用自身而没有停止条件。它是无限循环的递归等价物。

问题是该功能的第二行：

function adpcm_y = adpcm_encoder(raw_y)

    Y = wavread('two.wav');
    Y_en = adpcm_encoder(Y);

函数的第二行以递归方式再次调用该函数，但由于没有停止条件，它会一直持续到达到最大递归限制错误。

Answer 2

在Matlab的工作区中试试这个：

set(0, 'RecursionLimit', 100000)

然后再次运行您的代码。

达到最大递归限制500

2 个答案: