#!/bin/sh

mkdir -p recordings

while true
do
    # get date in ISO 8601 format with nanoseconds

    OS=$(uname)

    if [ "$OS" = "Darwin" ]; then
        DATE=$(gdate --iso-8601=ns)
    elif [ "$OS" = "Linux" ]; then
        DATE=$(date --iso-8601=ns)
    else
        echo "Unsupported OS: $OS"
        exit 2
    fi

    # record audio using ffmpeg

    ffmpeg \
        -y \
        -f pulse \
        -i "alsa_input.usb-HANMUS_USB_AUDIO_24BIT_2I2O_1612310-00.analog-stereo" \
        -ac 1 \
        -ar 96000 \
        -sample_fmt s32 \
        -t "3600" \
        -c:a flac \
        -compression_level 12 \
        "recordings/$DATE.flac"
done