wavread() and Matlab Coder

Hello!

I have a question regarding wavread and Matlab Coder.

1. Are there any way to read in a wav file when using Matlab Coder? Unfortunately wavread() and fopen() does not work.

As I want to port my program to c-code I have an idea that I should perhaps open the file before I send it to the generated c-code. The problem arises then when working on generating suitable code: I wish to generate code that can take wav-files of different lengths. Should I just specify an input of varying size as an input to the matlab program and the generated code will work?

/Anders

[Deepika Mallapragada]

Hi Anders, Did u get the solution for this question. Actually I am also facing same kind of problem. My input file is a wav file and I am unable to specify its datatype. What to do now?

Answer 1

[Walter Roberson]

Unfortunately audio files can be relatively complicated these days, so especially if you need to handle more than one format, you tend to use an external C audio library to handle reading the files.

[Andreas]

So say that I only wish to handle mono wav-files. There is still need for c? What kind of input (the opened audio file) will that give me to my program? I think I am looking for a workflow of some sort.

[Walter Roberson]

Is that PCM, Microsoft ADPCM, IMA ADPCM, G.723 ADPCM, G.721 ADPCM, G.711 a-law, G.711 µ-law, GSM 6.10, MPEG, other?

http://www.sonicspot.com/guide/wavefiles.html

MATLAB source for PCM only reading is at http://www.soundslogical.com/support/mpacks/documentation/english/documentparts/wavin.html

[Andreas]

I think I can go with whatever format that makes it easiest given that I can convert between them outside of matlab. So this PCM-reading will work with the coder?