On 11/29/2011 10:34 AM, Somebody in the thread at some point said:
On 28 November 2011 20:01, Kurt Taylor<kurt.tay...@linaro.org> wrote:
Hi everyone,
Last week I did an initial drop of the end to end audio test we have been
discussing.
The idea is fairly simple, play a sine wave and test the audio stack by
sampling/testing the sine back in via loopback cable. The app is called
testfreq and is driven by a script called e2eaudiotest. It opens and
configures the audio device, takes a sample and then does a discrete fourier
transformation to find the frequency using the fftw3 library. The test
script driver uses speaker-test to play a sine wave at A 440, which for now
is the test frequency. It's still basic at this point, but it does work on
my system. There is a lot of additional things I'd like to do, initial stack
configuration, passing in the device, passing the test frequency, doing more
auto detection, clean up the code, etc, but I wanted to start getting
feedback. Any and all would be appreciated.
Have a look, and if you have a loopback cable, give it a spin:
http://git.linaro.org/gitweb?p=people/kurt-r-taylor/e2eaudiotest.git
You can also read more about it and check my progress here:
https://blueprints.launchpad.net/linaro-multimedia-project/+spec/linaro-mmwg-e2eaudiotesting-basic
Looks pretty good for a low level test. I'm not sure how well it'll
work with Android. Would you be able to put together an Android App
that used MediaPlayer and MediaRecorder to accomplish the same thing?
Vishal was using mutant Android forms of aplay and arec when getting
audio up initially on Panda... subsequently I saw a friend doing
simultaneous record and play using the same tools. It's alsa under the
covers afaics.
Kurt did you try this on Panda yet?
-Andy
--
Andy Green | TI Landing Team Leader
Linaro.org │ Open source software for ARM SoCs | Follow Linaro
http://facebook.com/pages/Linaro/155974581091106 -
http://twitter.com/#!/linaroorg - http://linaro.org/linaro-blog
_______________________________________________
linaro-dev mailing list
linaro-dev@lists.linaro.org
http://lists.linaro.org/mailman/listinfo/linaro-dev
