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https://github.com/DJ2LS/FreeDATA
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71 lines
2.2 KiB
Markdown
71 lines
2.2 KiB
Markdown
# 001_HIGHSNR_STDIO_AUDIO TEST SUITE
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1. Install
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```
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sudo apt update
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sudo apt upgrade
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sudo apt install git cmake build-essential python3-pip portaudio19-dev python3-pyaudio
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pip3 install crcengine
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pip3 install threading
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```
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1. Install codec2, and set up the `libcodec2.so` shared library path, for example
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```
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export LD_LIBRARY_PATH=${HOME}/codec2/build_linux/src
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```
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## STDIO tests
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Pipes are used to move audio samples from the Tx to Rx:
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```
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python3 test_tx.py --mode datac1 --delay 500 --frames 2 --bursts 1 | python3 test_rx.py --mode datac1 --frames 2 --bursts 1
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```
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## AUDIO test via virtual audio devices
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1. Create virtual audio devices. Note: This command needs to be run again after every reboot
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```
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sudo modprobe snd-aloop index=1,2 enable=1,1 pcm_substreams=1,1 id=CHAT1,CHAT2
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```
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1. Check if devices have been created
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```
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aplay -l
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Karte 0: Intel [HDA Intel], Gerät 0: Generic Analog [Generic Analog]
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Sub-Geräte: 1/1
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Sub-Gerät #0: subdevice #0
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Karte 1: CHAT1 [Loopback], Gerät 0: Loopback PCM [Loopback PCM]
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Sub-Geräte: 1/1
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Sub-Gerät #0: subdevice #0
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Karte 1: CHAT1 [Loopback], Gerät 1: Loopback PCM [Loopback PCM]
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Sub-Geräte: 1/1
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Sub-Gerät #0: subdevice #0
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Karte 2: CHAT2 [Loopback], Gerät 0: Loopback PCM [Loopback PCM]
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Sub-Geräte: 1/1
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Sub-Gerät #0: subdevice #0
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Karte 2: CHAT2 [Loopback], Gerät 1: Loopback PCM [Loopback PCM]
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Sub-Geräte: 1/1
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Sub-Gerät #0: subdevice #0
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```
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1. Determine the audio device number you would like to use:
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```
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python3 test_rx.py --list
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<snip>
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audiodev: 0 HDA Intel PCH: ALC269VC Analog (hw:0,0)
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audiodev: 1 HDA Intel PCH: HDMI 0 (hw:0,3)
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audiodev: 2 HDA Intel PCH: HDMI 1 (hw:0,7)
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audiodev: 3 HDA Intel PCH: HDMI 2 (hw:0,8)
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audiodev: 4 Loopback: PCM (hw:1,0)
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audiodev: 5 Loopback: PCM (hw:1,1)
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audiodev: 6 Loopback: PCM (hw:2,0)
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audiodev: 7 Loopback: PCM (hw:2,1)
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```
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In this case we choose audiodev 4 for the RX and 5 for the Tx.
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1. Start the Rx first, then Tx in separate consoles:
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```
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python3 test_rx.py --mode datac0 --frames 2 --bursts 1 --audiodev 4 --debug
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python3 test_tx.py --mode datac0 --frames 2 --bursts 1 --audiodev 5
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