opusmic.sh

#!/bin/sh

OPFILE=$2

OPMIC_NAME=opusmic
OPMIC_FILE=/tmp/opusmic
OPMIC_RAW=/tmp/opusmic.raw

mkdir -p ~/.config/pulse
OPMIC_CONF=~/.config/pulse/client.conf

OPFILE_FORMAT=s16le
# OPFILE_RATE=48000
# OPFILE_CHANNELS=2

if [ "$1" == 'off' ]
then
	pactl unload-module module-pipe-source
	rm -f ~/.config/pulse/client.conf
	rm -f "$OPMIC_FILE"
	rm -f "$OPMIC_RAW"
	exit 0
fi

OPFILE_CHANNELS=$(opusinfo "$OPFILE" | grep Channels | cut -d ' ' -f 2)
OPFILE_RATE="$(opusinfo "$OPFILE" | grep 'Original sample rate:' | sed 's/[^:]*: //' | cut -d ' ' -f 1)"
echo CHANNELS $OPFILE_CHANNELS
echo RATE $OPFILE_RATE
echo ""


echo "Creating virtual microphone."
echo pactl load-module module-pipe-source source_name="$OPMIC_NAME" file="$OPMIC_FILE" format="$OPFILE_FORMAT" rate="$OPFILE_RATE" channels="$OPFILE_CHANNELS"
pactl load-module module-pipe-source source_name="$OPMIC_NAME" file="$OPMIC_FILE" format="$OPFILE_FORMAT" rate="$OPFILE_RATE" channels="$OPFILE_CHANNELS"

echo "Set the virtual microphone as the default device."
pactl set-default-source virtmic

# Create a file that will set the default source device to virtmic for all
# PulseAudio client applications.
echo "default-source = $OPMIC_NAME" > "$OPMIC_CONF"

# Opus to raw"
echo "Opus to raw..."
ffmpeg -i "$OPFILE" -f "$OPFILE_FORMAT" -acodec pcm_"$OPFILE_FORMAT" "$OPMIC_RAW"

#  Write the audio file to the named pipe virtmic. This will block until the named pipe is read.
echo "Writing audio file to virtual microphone."
while true; do
    cat "$OPMIC_RAW" > "$OPMIC_FILE"
done