PinePhone call recording scripts

pinephone_call_recording_scripts.sh

# PinePhone call recording scripts (not using the custom modem firmware due to issues: https://github.com/the-modem-distro/pinephone_modem_sdk/issues/259)

# Information to enable ADB on the original modem firmware:
# https://github.com/Biktorgj/quectel_eg25_recovery/issues/26
# https://xnux.eu/devices/feature/modem-pp.html#toc-unlock-adb-access
# https://xnux.eu/devices/feature/qadbkey-unlock.c


# record_call_start.sh
# selecting "Make a phone call" in Phosh sound settings before making a new call is recommended to prevent empty recording (maybe related to call crashing or phone reboot)

#echo 'AT+QAUDRD=1,"'$(date +%Y%m%d%H%M%S)'_uplink.wav",13,0' | sudo atinout - /dev/ttyUSB2 -

time=$(date +%Y%m%d%H%M%S) # use date command only once to have the same recording time in both filenames
echo 'AT+QAUDRD=1,"'$time'_downlink.wav",13,1' | sudo atinout - /dev/ttyUSB2 -
pw-record ~/Documents/recordings/$time.wav # both microphone and speaker are recorded if not using headphones
echo 'AT+QAUDRD=0' | sudo atinout - /dev/ttyUSB2 - # stop call recording on modem after pressing Ctrl+C for pw-record command 

# trying to record both uplink and downlink from modem (not working correctly with headphones)
#echo 'AT+QAUDRD=1,"'$(date +%Y%m%d%H%M%S)'.wav",13' | sudo atinout - /dev/ttyUSB2 -


# recording_merge.sh (necessary when using headphones only)
# https://trac.ffmpeg.org/wiki/AudioVolume
#ffmpeg -i ${1}.wav -filter:a "volume=50dB" ${1}_amplified.wav
# https://superuser.com/questions/644768/how-to-merge-audio-using-ffmpeg-not-concat/645238#645238
#ffmpeg -i ${1}_downlink.wav -i ${1}_amplified.wav -filter_complex amix ${1}_merged.wav
# https://stackoverflow.com/questions/65488904/merge-both-audio-with-delay-use-ffmpeg/65496856#65496856 
#ffmpeg -i ${1}_downlink.wav -i ${1}_amplified.wav -filter_complex "[1:a]adelay=1000:all=1[a1];[0:a][a1]amix" ${1}_merged.wav

# https://stackoverflow.com/questions/64729433/ffmpeg-how-to-add-volume-to-filter-complex/64731319#64731319
ffmpeg -i ${1}_downlink.wav -i ${1}.wav  -filter_complex "[1:a]adelay=1000:all=1,volume=50dB[a1];[0:a][a1]amix" ${1}_merged.wav


# get_recordings.sh (necessary when using headphones only but recommended to always save downlink sound to modem in case you plug headphones during a recorded call, adapted from the script in the repository https://github.com/the-modem-distro/pinephone_modem_sdk/issues/241)
# After enabling ADB, you may see an error when trying to pull files: "adb: error: remote object '...' does not exist"
# It can be fixed by rebooting the modem: echo 'AT+CFUN=1,1' | sudo atinout - /dev/ttyUSB2 -

#!/bin/bash
TARGETPATH=~/Documents/recordings/
FILESPERSIST=`adb shell ls /data/ufs/`
mkdir -p $TARGETPATH
cd $TARGETPATH
for file in $FILESPERSIST; do
        if [[ $file =~ .*\.(wav) ]]; then
                THISFILE=$(echo $file|tr -d '\n'|tr -d '\r')
                echo "Pulling "$THISFILE
                adb  pull /data/ufs/${THISFILE} && adb shell rm /data/ufs/${THISFILE}
        fi
done;