[alsa-devel] [PATCH V2 0/7] BAT: Add Basic Audio Tester command line tool

[Takashi Iwai]

On Wed, 23 Sep 2015 09:48:48 +0200,
han.lu at intel.com wrote:
> 
> From: "Lu, Han" <han.lu at intel.com>
> 
> BAT (Basic Audio Tester) is a simple command line utility intended
> to automate audio driver and sound server QA testing with no human
> interaction.
> 
> BAT works by playing an audio stream and capturing the same stream
> in either a digital or analog loop back. It then compares the captured
> stream to the original to determine if the test case passes or fails.
> 
> The main idea of frequency detecting is:
> The analysis function reads data from WAV file, run FFT against the data
> to get magnitude of frequency vectors, and then calculates the average
> value and standard deviation of frequency vectors. After that, we define
> a threshold:
>     threshold = 3 * standard_deviation + average_value
> Frequencies with amplitude larger than threshold will be recognized as
> a peak, and the frequency with largest peak value will be recognized as
> a detected frequency.
> BAT then compares the detected frequency to target frequency, to decide
> if the detecting passes or fails.
> 
> BAT supports 4 working modes:
>   1. Single line playback;
>   2. Single line capture and analysis;
>   3. Playback and capture in loop, and analyze captured data;
>   4. Local analyze without actual playback or capture.
> BAT will check devices input by user to decide which mode to use.
> BAT will create threads for playback and record, and will run spectrum
> analysis for mode 2, 3 or 4.
> 
> Changes on V2:
> 	1. Adopt Caleb Crome's method to generate sine signal to avoids
> 	unwanted distortion on waveform.
> 
> Lu, Han (7):
>   BAT: Add initial functions
>   BAT: Add common definitions and functions
>   BAT: Add playback and record functions
>   BAT: Add signal generator
>   BAT: Add converting functions
>   BAT: Add spectrum analysis functions
>   BAT: Add Makefile and configures

Thanks, I applied all patches now for making the further development
easier.  But in general, please give a good documentation describing
how to use it, at best, in a form of man page.

I'll give some comments in each patch later.


Takashi