From ca0dbdcab4417d5c2a95db603aec0782cb4339a5 Mon Sep 17 00:00:00 2001
From: Nico Rey <rey.nico@gmail.com>
Date: Sun, 27 Sep 2020 20:39:21 -0300
Subject: [PATCH] Use ramfs to record audio

---
 common.sh         |  4 ++--
 receive.sh        |  8 ++++----
 receive_meteor.sh | 10 +++-------
 3 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/common.sh b/common.sh
index b24f3dd..85af1c6 100755
--- a/common.sh
+++ b/common.sh
@@ -45,8 +45,8 @@ if [ ! -d "${METEOR_OUTPUT}/audio/" ]; then
 	mkdir -m 775 -p "${METEOR_OUTPUT}/audio/"
 fi
 
-if [ ! -d "${NOAA_AUDIO}/audio/" ]; then
-	mkdir -m 775 -p "${NOAA_AUDIO}/audio/"
+if [ ! -d "${RAMFS_AUDIO}/audio/" ]; then
+	mkdir -m 775 -p "${RAMFS_AUDIO}/audio/"
 fi
 
 if [ ! -d "${NOAA_OUTPUT}/image/" ]; then
diff --git a/receive.sh b/receive.sh
index 4ba9660..c3b3522 100755
--- a/receive.sh
+++ b/receive.sh
@@ -26,7 +26,7 @@ fi
 # $7 = Satellite max elevation
 
 log "Starting rtl_fm record" "INFO"
-timeout "${6}" /usr/local/bin/rtl_fm ${BIAS_TEE} -f "${2}"M -s 60k -g 50 -p 55 -E wav -E deemp -F 9 - | /usr/bin/sox -t raw -e signed -c 1 -b 16 -r 60000 - "${NOAA_AUDIO}/audio/${3}.wav" rate 11025
+timeout "${6}" /usr/local/bin/rtl_fm ${BIAS_TEE} -f "${2}"M -s 60k -g 50 -p 55 -E wav -E deemp -F 9 - | /usr/bin/sox -t raw -e signed -c 1 -b 16 -r 60000 - "${RAMFS_AUDIO}/audio/${3}.wav" rate 11025
 
 if [ ! -d "{NOAA_OUTPUT}/image/${FOLDER_DATE}" ]; then
 	mkdir -m 775 -p "${NOAA_OUTPUT}/image/${FOLDER_DATE}"
@@ -44,7 +44,7 @@ log "Bulding pass map" "INFO"
 /usr/local/bin/wxmap -T "${1}" -H "${4}" -p 0 -l 0 -o "${PASS_START}" "${NOAA_HOME}/map/${3}-map.png"
 for i in $ENHANCEMENTS; do
 	log "Decoding image" "INFO"
-	/usr/local/bin/wxtoimg -o -m "${NOAA_HOME}/map/${3}-map.png" -e "$i" "${NOAA_AUDIO}/audio/${3}.wav" "${NOAA_OUTPUT}/image/${3}-$i.jpg"
+	/usr/local/bin/wxtoimg -o -m "${NOAA_HOME}/map/${3}-map.png" -e "$i" "${RAMFS_AUDIO}/audio/${3}.wav" "${NOAA_OUTPUT}/image/${3}-$i.jpg"
 	/usr/bin/convert -quality 90 -format jpg "${NOAA_OUTPUT}/image/${3}-$i.jpg" -undercolor black -fill yellow -pointsize 18 -annotate +20+20 "${1} $i ${START_DATE}" "${NOAA_OUTPUT}/image/${3}-$i.jpg"
 	/usr/bin/convert -thumbnail 300 "${NOAA_OUTPUT}/image/${3}-$i.jpg" "${NOAA_OUTPUT}/image/thumb/${3}-$i.jpg
 done
@@ -61,8 +61,8 @@ fi
 
 if [ "$DELETE_AUDIO" = true ]; then
 	log "Deleting audio files" "INFO"
-    rm "${NOAA_AUDIO}/audio/${3}.wav"
+    rm "${RAMFS_AUDIO}/audio/${3}.wav"
 else
 	log "Moving audio files out of the SD card" "INFO"
-    mv "${NOAA_AUDIO}/audio/${3}.wav" "${NOAA_OUTPUT}/audio/${3}.wav"
+    mv "${RAMFS_AUDIO}/audio/${3}.wav" "${NOAA_OUTPUT}/audio/${3}.wav"
 fi
diff --git a/receive_meteor.sh b/receive_meteor.sh
index 75ecea1..064c74a 100755
--- a/receive_meteor.sh
+++ b/receive_meteor.sh
@@ -29,18 +29,14 @@ fi
 # $7 = Satellite max elevation
 
 log "Starting rtl_fm record" "INFO"
-timeout "${6}" /usr/local/bin/rtl_fm ${BIAS_TEE} -M raw -f "${2}"M -s 288k -g 48 -p 1 | sox -t raw -r 288k -c 2 -b 16 -e s - -t wav "${METEOR_OUTPUT}/audio/${3}.wav" rate 96k
-
-log "Normalization in progress" "INFO"
-sox "${METEOR_OUTPUT}/audio/${3}.wav" "${METEOR_OUTPUT}/${3}.wav" gain -n
+timeout "${6}" /usr/local/bin/rtl_fm ${BIAS_TEE} -M raw -f "${2}"M -s 288k -g 48 -p 1 | sox -t raw -r 288k -c 2 -b 16 -e s - -t wav "${RAMFS_AUDIO}/audio/${3}.wav" rate 96k
 
 log "Demodulation in progress (QPSK)" "INFO"
-meteor_demod -B -o "${METEOR_OUTPUT}/${3}.qpsk" "${METEOR_OUTPUT}/${3}.wav"
+meteor_demod -B -o "${METEOR_OUTPUT}/${3}.qpsk" "${RAMFS_AUDIO}/audio/${3}.wav"
 
 if [ "$DELETE_AUDIO" = true ]; then
     log "Deleting audio files" "INFO"
-    rm "${METEOR_OUTPUT}/audio/${3}.wav"
-    rm "${METEOR_OUTPUT}/${3}.wav"
+    rm "${RAMFS_AUDIO}/audio/${3}.wav"
 fi
 
 log "Decoding in progress (QPSK to BMP)" "INFO"