FreeDATA/test/001_highsnr_stdio_audio/test_virtual1a.sh

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#!/bin/bash -x
# Run a test using the virtual sound cards, tx sound I/O performed by aplay
# and arecord at Fs=48000Hz, we pipe to Python utilities
function check_alsa_loopback {
lsmod | grep snd_aloop >> /dev/null
if [ $? -eq 1 ]; then
echo "ALSA loopback device not present. Please install with:"
echo
echo " sudo modprobe snd-aloop index=1,2 enable=1,1 pcm_substreams=1,1 id=CHAT1,CHAT2"
exit 1
fi
}
check_alsa_loopback
RX_LOG=$(mktemp)
MAX_RUN_TIME=2600
# make sure all child processes are killed when we exit
trap 'jobs -p | xargs -r kill' EXIT
arecord -r 48000 --device="plughw:CARD=CHAT1,DEV=0" -f S16_LE -d $MAX_RUN_TIME | \
sox -t .s16 -r 48000 -c 1 - -t .s16 -r 8000 -c 1 - | \
python3 test_rx.py --mode datac0 --frames 2 --bursts 5 --debug &
rx_pid=$!
sleep 1
python3 test_tx.py --mode datac0 --frames 2 --bursts 5 --delay 500 | \
sox -t .s16 -r 8000 -c 1 - -t .s16 -r 48000 -c 1 - | \
aplay -r 48000 --device="plughw:CARD=CHAT1,DEV=1" -f S16_LE
wait ${rx_pid}