Add Tool

Signed-off-by: hax <hax@lainlounge.org>

wave2m4a

@@ -0,0 +1,117 @@
+#!/usr/bin/env bash
+# -----------------------------------------------------------------------------
+# Title:     wav2m4a
+# Purpose:   Comprehensive WAV to M4A auto-converter
+# Version:   1.0.0
+# Developer: h@x
+# -----------------------------------------------------------------------------
+
+set -euo pipefail
+trap 'echo "✗ ERROR on line $LINENO (exit code $?): ${BASH_COMMAND}" >&2' ERR
+IFS=$'\n\t'
+
+# === Input & output directories ===
+SRC_DIR="${1:-.}"
+DST_DIR="${2:-./m4a_output}"
+[[ -d "$SRC_DIR" ]] || {
+  echo "ERROR: Source directory '$SRC_DIR' not found." >&2
+  exit 1
+}
+mkdir -p "$DST_DIR"
+
+# === FFmpeg capability check ===
+if ! ffmpeg -hide_banner -muxers 2>/dev/null | grep -qw mov; then
+  echo "ERROR: FFmpeg build lacks the MP4/mov muxer required for .m4a outputs." >&2
+  exit 1
+fi
+
+# === Codec selection ===
+declare -a CODEC_OPTS
+if ffmpeg -hide_banner -encoders 2>/dev/null | grep -qw libfdk_aac; then
+  CODEC_OPTS=( -c:a libfdk_aac -profile:a aac_he_v2 -cutoff 18000 -b:a 256k )
+  echo "INFO: Using libfdk_aac HE-AAC v2 @256 kbps." >&2
+else
+  CODEC_OPTS=( -c:a aac -b:a 256k )
+  echo "WARNING: Falling back to native AAC @256 kbps." >&2
+fi
+
+declare -a META_OPTS=(
+  -map_metadata 0
+  -id3v2_version 3
+  -write_id3v1 1
+  -metadata:s:a encoder="ffmpeg/${CODEC_OPTS[1]}"
+)
+declare -a FFMPEG_OPTS=( -hide_banner -loglevel error -nostdin -n )
+
+# === Discover .wav files ===
+mapfile -d '' files < <(find "$SRC_DIR" -type f -iname '*.wav' -print0)
+TOTAL=${#files[@]}
+
+(( TOTAL > 0 )) || {
+  echo "Nothing to do: no .wav files found under '$SRC_DIR'." >&2
+  exit 0
+}
+echo "FOUND: $TOTAL .wav file(s) to process." >&2
+
+# === Progress-bar initialization ===
+BAR_WIDTH=40
+COUNT=0
+LAST_PCT=-1
+
+empty_bar=$(printf '%*s' "$BAR_WIDTH" '' | tr ' ' '.')
+printf "Progress: [%-${BAR_WIDTH}s]   0%% (%d/%d)\n" \
+  "$empty_bar" 0 "$TOTAL" >&2
+
+# === Conversion loop with ANSI overwrite ===
+declare -a SKIPPED=()
+declare -a CONVERTED=()
+declare -A FAILED=()
+
+for SRC_FILE in "${files[@]}"; do
+  (( COUNT += 1 ))
+  REL_PATH="${SRC_FILE#"$SRC_DIR"/}"
+  DST_FILE="$DST_DIR/${REL_PATH%.wav}.m4a"
+  mkdir -p "$(dirname "$DST_FILE")"
+
+  PCT=$(( COUNT * 100 / TOTAL ))
+  if (( PCT != LAST_PCT )); then
+    LAST_PCT=$PCT
+    filled=$(( COUNT * BAR_WIDTH / TOTAL ))
+    fbar=$(printf '%*s' "$filled" '' | tr ' ' '#')
+    ebar=$(printf '%*s' "$(( BAR_WIDTH - filled ))" '' | tr ' ' '.')
+    printf "\033[1A\rProgress: [%s%s] %3d%% (%d/%d)\n" \
+      "$fbar" "$ebar" "$PCT" "$COUNT" "$TOTAL" >&2
+  fi
+
+  if [[ -f "$DST_FILE" ]]; then
+    SKIPPED+=("$REL_PATH")
+  else
+    if ffmpeg "${FFMPEG_OPTS[@]}" -i "$SRC_FILE" \
+         "${CODEC_OPTS[@]}" -vn "${META_OPTS[@]}" -f ipod "$DST_FILE"; then
+      CONVERTED+=("$REL_PATH")
+    else
+      FAILED["$REL_PATH"]=1
+    fi
+  fi
+done
+
+# === Summary ===
+echo >&2
+printf "========== SUMMARY ==========\n" >&2
+
+printf "Skipped (already present): %d\n" "${#SKIPPED[@]}" >&2
+for f in "${SKIPPED[@]}"; do printf " • %s\n" "$f"; done >&2
+
+echo >&2
+printf "Converted: %d\n" "${#CONVERTED[@]}" >&2
+for f in "${CONVERTED[@]}"; do printf " • %s\n" "$f"; done >&2
+
+echo >&2
+printf "Failed: %d\n" "${#FAILED[@]}" >&2
+for f in "${!FAILED[@]}"; do printf " • %s\n" "$f"; done >&2
+
+echo >&2
+printf "Output directory: '%s'\n" "$DST_DIR" >&2
+echo "=============================" >&2
+
+(( ${#FAILED[@]} )) && exit 2 || exit 0