Initial commit: call recorder with MP3 output and --show-inputs monitor

2026-03-24 10:47:08 +01:00
commit eda2c5c49d
5 changed files with 251 additions and 0 deletions
@@ -0,0 +1,135 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+RECORDINGS_DIR="$SCRIPT_DIR/recordings"
+mkdir -p "$RECORDINGS_DIR"
+
+OUTPUT="$RECORDINGS_DIR/call_$(date +%Y%m%d_%H%M%S).mp3"
+
+# Argument parsing
+SHOW_INPUTS=false
+for arg in "$@"; do
+  [[ "$arg" == "--show-inputs" ]] && SHOW_INPUTS=true
+done
+
+# Detect the default audio sink via PipeWire metadata
+DEFAULT_SINK=$(pw-metadata 0 2>/dev/null \
+  | awk -F"'" '/default\.audio\.sink/ { print $4 }' \
+  | grep -o '"name":"[^"]*"' \
+  | cut -d'"' -f4)
+
+if [[ -z "$DEFAULT_SINK" ]]; then
+  echo "ERROR: Could not detect default audio sink." >&2
+  echo "Run ./list-sources.sh to see available devices." >&2
+  exit 1
+fi
+
+MONITOR_SOURCE="${DEFAULT_SINK}.monitor"
+
+# --- show-inputs mode ---
+if $SHOW_INPUTS; then
+  BAR_WIDTH=30
+  DB_MIN=-60
+  DB_MAX=0
+
+  render_bar() {
+    local label="$1"
+    local db="$2"
+    local bar=""
+    local filled=0
+
+    if [[ -n "$db" ]]; then
+      # Clamp to range
+      local clamped
+      clamped=$(awk -v v="$db" -v lo="$DB_MIN" -v hi="$DB_MAX" \
+        'BEGIN { if (v < lo) v=lo; if (v > hi) v=hi; print v }')
+      filled=$(awk -v v="$clamped" -v lo="$DB_MIN" -v hi="$DB_MAX" -v w="$BAR_WIDTH" \
+        'BEGIN { printf "%d", (v - lo) / (hi - lo) * w }')
+    fi
+
+    local empty=$(( BAR_WIDTH - filled ))
+
+    # Color based on level
+    local color="\033[32m"  # green
+    if [[ -n "$db" ]]; then
+      color=$(awk -v v="$db" 'BEGIN {
+        if (v >= -3)  { print "\033[31m" }
+        else if (v >= -12) { print "\033[33m" }
+        else { print "\033[32m" }
+      }')
+    fi
+
+    bar="${color}"
+    local i
+    for (( i=0; i<filled; i++ )); do bar+="█"; done
+    for (( i=0; i<empty;  i++ )); do bar+="░"; done
+    bar+="\033[0m"
+
+    local db_str="${db:-  ---}"
+    printf "  %-13s: [%b] %6s dB\n" "$label" "$bar" "$db_str"
+  }
+
+  echo "=========================================="
+  echo "  Input Monitor  (Ctrl+C to exit)"
+  echo "=========================================="
+  echo ""
+
+  TMP_MIC=$(mktemp)
+  TMP_SYS=$(mktemp)
+
+  ffmpeg -loglevel info -f pulse -i default \
+    -af ebur128 -f null - 2>"$TMP_MIC" &
+  PID_MIC=$!
+
+  ffmpeg -loglevel info -f pulse -i "$MONITOR_SOURCE" \
+    -af ebur128 -f null - 2>"$TMP_SYS" &
+  PID_SYS=$!
+
+  cleanup() {
+    kill "$PID_MIC" "$PID_SYS" 2>/dev/null || true
+    rm -f "$TMP_MIC" "$TMP_SYS"
+    tput cnorm
+    echo ""
+    exit 0
+  }
+  trap cleanup INT TERM
+
+  tput civis  # hide cursor
+
+  # Reserve two lines
+  printf "\n\n"
+
+  while true; do
+    MIC_DB=$(grep -oP 'M:\s*\K[-0-9.]+' "$TMP_MIC" 2>/dev/null | tail -1 || true)
+    SYS_DB=$(grep -oP 'M:\s*\K[-0-9.]+' "$TMP_SYS" 2>/dev/null | tail -1 || true)
+
+    printf "\033[2A"  # move up 2 lines
+    render_bar "Mikrofon" "$MIC_DB"
+    render_bar "System Audio" "$SYS_DB"
+
+    sleep 0.1
+  done
+fi
+
+# --- Recording mode ---
+echo "=========================================="
+echo "  Call Recorder"
+echo "=========================================="
+echo "  Microphone  : default"
+echo "  System audio: $MONITOR_SOURCE"
+echo "  Output file : $OUTPUT"
+echo "------------------------------------------"
+echo "  Press Ctrl+C to stop recording."
+echo "=========================================="
+echo ""
+
+ffmpeg -loglevel warning \
+  -f pulse -i default \
+  -f pulse -i "$MONITOR_SOURCE" \
+  -filter_complex "amix=inputs=2:duration=longest:normalize=0" \
+  -c:a libmp3lame -b:a 128k \
+  "$OUTPUT"
+
+echo ""
+echo "Recording saved to: $OUTPUT"