Seek audio

[emretural]

Hey there,

Thanks for the amazing work !
I'm trying to play audio files from sd card using i2s according to commands coming from bluetooth and it works like a charm
But i also need to seek audio file. Like start playing "this" audio from "this" second
I couldn't find a function for that. I was wondering if thats possible

Thanks in advance everyone

[pschatzmann]

You could implement a simple stream filter that ignores the first n samples and provide a method which translates time to number samples with the help of the sample rate...

Another approach, that you could implement in your sketch, would be that you start with a AudioCopy with the destination to NullStream. You sum up the result of the copy() calls, and after you get valid data you copy to the real destination...

[luke2023]

great idea, but it requires a lot of time if I have a big file right ?

[pschatzmann]

It is worth a trial: it is driven by the decoding speed which should be faster than the playing speed. If you use wav files, you will not even notice any delay...

[luke2023]

Nice!Do you have any mp3 beta or examples for that ?Thank you for your helping!``

[pschatzmann]

I just added the TimeInfoStream in Experiments: I suggest that you have a look at the available methods and run some tests.
You could wrap e.g. an I2SStream class:

#include "Experiments/TimeInfoStream.h"

I2SStream i2s;
TimeInfoStream timedOut(i2s);