how can i convert following script into c coding

Question

Ahmed Hassan Sher 2020-6-24

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/554164-how-can-i-convert-following-script-into-c-coding

评论： Walter Roberson 2020-6-25

 [filename,pathname]  = uigetfile('*.*','select audio');
[x,fs] = audioread(num2str(filename));
fsf = 44100;
fp = 8e3;
fst = 8.4e3;
ap = 1;
ast = 95;
df = designfilt('lowpassfir','passbandfrequency',fp,'stopbandfrequency',fst,'passbandripple',ap,'stopbandattenuation',ast,'samplerate',fsf);
 
fvtool(df);
xn=awgn(x,15,'measured');
y=filter(df,xn);
 sound_input = y;  %read the audio file into this array
sound_output = zeros(size(sound_input));
for i = 101:length(sound_input)
    sum = 0;
    for j = 1:100-1
        a = sound_input(i-j);
        c = b(j);
        
        sum = sum + a.*(c);
      
    end
    sound_output(i) = sum;
end
figure
subplot(411);
plot(sound_input);
title('sound input');
subplot(412);
plot(sound_output);
title('sound output');
ORIGINAL = fft(sound_input,512);
Pyy1 = ORIGINAL .* conj(ORIGINAL) / 512;
FILTERED = fft(sound_output,512);
Pyy2 = FILTERED .* conj(FILTERED) / 512;
f = 1000*(0:256)/512;
figure
subplot(211)
plot(f,Pyy1(1:257))
title('Frequency content of original')
xlabel('frequency (Hz)')
subplot(212)
plot(f,Pyy2(1:257))
title('Frequency content of filtered')
xlabel('frequency (Hz)')

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Walter Roberson 2020-6-25

You cannot. uigetfile() returns a "number" only in the case that the user cancels, in which case it returns the empty double precision array; otherwise it returns a character vector. num2str() applied to the empty double precision array will return the empty character vector, which is not a file name that you will be able to audioread(). num2str() applied to a character vector will return the same character vector, by accident.

Then you audioread() what you got back, but you do not pay attention to the directory information that was returned by uigetfile(). The audioread() is going to fail unless the user happened to choose something from the current directory.

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Answer 1

Aditya Verma 2020-6-25

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/554164-how-can-i-convert-following-script-into-c-coding#answer_456760

Hi!

You can check out MATLAB Coder, it allows you to generate C/C++ code from MATLAB code. However it doesn't support all MATLAB language features/functionalities. You can check the same from here:

https://www.mathworks.com/help/coder/ug/matlab-language-features-supported-for-code-generation.html

https://www.mathworks.com/help/coder/ug/functions-and-objects-supported-for-cc-code-generation.html

Thanks