FreeDATA/test/001_highsnr_stdio_audio
2021-12-15 16:43:47 +10:30
..
README.md added cmd line arument to list audiodev by number, test_tx.py and test_rx.py working OK with virtual audio card, updated README.md with latest examples 2021-12-14 12:35:19 +10:30
test_multimode_rx.py larger buffers, and an different approach to logging 2021-12-15 16:42:38 +10:30
test_multimode_tx.py tell us when we Tx a frame 2021-12-15 16:43:30 +10:30
test_rx.py test_multimode_rx.py using audio_buffer calls and working well :) 2021-12-15 15:05:30 +10:30
test_tx.py longer timeout on test_virtual2 2021-12-15 12:19:06 +10:30
test_virtual1.sh fine grained tests at 48000 Hz, currently won't work as resampler commented out of test_tx.py and test_rx.py 2021-12-15 11:12:31 +10:30
test_virtual1a.sh fine grained tests at 48000 Hz, currently won't work as resampler commented out of test_tx.py and test_rx.py 2021-12-15 11:12:31 +10:30
test_virtual1b.sh fine grained tests at 48000 Hz, currently won't work as resampler commented out of test_tx.py and test_rx.py 2021-12-15 11:12:31 +10:30
test_virtual1c.sh fine grained tests at 48000 Hz, currently won't work as resampler commented out of test_tx.py and test_rx.py 2021-12-15 11:12:31 +10:30
test_virtual2.sh longer timeout on test_virtual2 2021-12-15 12:19:06 +10:30
test_virtual_mm.sh multimode virtual test working better 2021-12-15 16:43:47 +10:30

001_HIGHSNR_STDIO_AUDIO TEST SUITE

  1. Install
    sudo apt update
    sudo apt upgrade
    sudo apt install git cmake build-essential python3-pip portaudio19-dev python3-pyaudio
    pip3 install crcengine
    pip3 install threading
    
  2. Install codec2, and set up the libcodec2.so shared library path, for example
    export LD_LIBRARY_PATH=${HOME}/codec2/build_linux/src
    

STDIO tests

Pipes are used to move audio samples from the Tx to Rx:

python3 test_tx.py --mode datac1 --delay 500 --frames 2 --bursts 1 | python3 test_rx.py --mode datac1 --frames 2 --bursts 1

AUDIO test via virtual audio devices

  1. Create virtual audio devices. Note: This command needs to be run again after every reboot

    sudo modprobe snd-aloop index=1,2 enable=1,1 pcm_substreams=1,1 id=CHAT1,CHAT2 
    
  2. Check if devices have been created

     aplay -l
    
     Karte 0: Intel [HDA Intel], Gerät 0: Generic Analog [Generic Analog]
       Sub-Geräte: 1/1
       Sub-Gerät #0: subdevice #0
     Karte 1: CHAT1 [Loopback], Gerät 0: Loopback PCM [Loopback PCM]
       Sub-Geräte: 1/1
       Sub-Gerät #0: subdevice #0
     Karte 1: CHAT1 [Loopback], Gerät 1: Loopback PCM [Loopback PCM]
       Sub-Geräte: 1/1
       Sub-Gerät #0: subdevice #0
     Karte 2: CHAT2 [Loopback], Gerät 0: Loopback PCM [Loopback PCM]
       Sub-Geräte: 1/1
       Sub-Gerät #0: subdevice #0
     Karte 2: CHAT2 [Loopback], Gerät 1: Loopback PCM [Loopback PCM]
       Sub-Geräte: 1/1
       Sub-Gerät #0: subdevice #0
    
  3. Determine the audio device number you would like to use:

    python3 test_rx.py --list
    <snip>
    audiodev:  0 HDA Intel PCH: ALC269VC Analog (hw:0,0)
    audiodev:  1 HDA Intel PCH: HDMI 0 (hw:0,3)
    audiodev:  2 HDA Intel PCH: HDMI 1 (hw:0,7)
    audiodev:  3 HDA Intel PCH: HDMI 2 (hw:0,8)
    audiodev:  4 Loopback: PCM (hw:1,0)
    audiodev:  5 Loopback: PCM (hw:1,1)
    audiodev:  6 Loopback: PCM (hw:2,0)
    audiodev:  7 Loopback: PCM (hw:2,1)
    

    In this case we choose audiodev 4 for the RX and 5 for the Tx.

  4. Start the Rx first, then Tx in separate consoles:

    python3 test_rx.py --mode datac0 --frames 2 --bursts 1 --audiodev 4 --debug
    python3 test_tx.py --mode datac0 --frames 2 --bursts 1 --audiodev 5