42 lines
1.6 KiB
Bash
42 lines
1.6 KiB
Bash
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#!/bin/bash
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# 从指定 SOFA 提取 12 个单声道 IR 给 PipeWire convolver 用
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# 用法: 换HRTF.sh <sofa文件> <输出目录名>
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# 例: 换HRTF.sh H4_..._48K_24bit_256tap_FIR_SOFA.sofa H4-48k
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# 提取方式: 给 5.1 里只有一路单位脉冲的输入, 让 sofalizer 时域渲染,
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# 输出即该方向到两耳的脉冲响应。
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# ★ 增益必须按 SOFA 实测再给: MIT KEMAR 电平低, +10dB 才不小声;
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# 而 SADIE-II 的 IR 本身就顶到 0dBFS, 再加就削波爆音。默认 0。
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set -eu
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SOFA="$(readlink -f "$1")"
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NAME="$2"
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GAIN="${3:-0}"
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BASE="/home/lou/桌面/工作区/实验/空间音频"
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OUT="$BASE/hrir/$NAME"
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[ -f "$SOFA" ] || { echo "找不到 SOFA: $SOFA"; exit 1; }
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rm -rf "$OUT"; mkdir -p "$OUT"
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cd "$OUT"
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i=0
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for name in FL FR FC LFE BL BR; do
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exp=""
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for j in 0 1 2 3 4 5; do
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[ "$j" -gt 0 ] && exp="$exp|"
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if [ "$j" -eq "$i" ]; then exp="${exp}between(t,0,1/48000)"; else exp="${exp}0"; fi
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done
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ffmpeg -y -hide_banner -loglevel error -f lavfi \
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-i "aevalsrc='${exp}':d=0.05:s=48000:c=5.1" \
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-af "sofalizer=sofa=${SOFA}:type=time:gain=${GAIN}" -c:a pcm_f32le "${name}_bi.wav"
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i=$((i + 1))
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done
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for f in FL FR FC LFE BL BR; do
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ffmpeg -y -hide_banner -loglevel error -i "${f}_bi.wav" -af "pan=mono|c0=c0" -c:a pcm_f32le "${f}_L.wav"
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ffmpeg -y -hide_banner -loglevel error -i "${f}_bi.wav" -af "pan=mono|c0=c1" -c:a pcm_f32le "${f}_R.wav"
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rm -f "${f}_bi.wav"
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done
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echo "完成 -> $OUT"
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printf " %-8s %s Hz\n" "$(ls *.wav | head -1)" "$(ffprobe -v error -show_entries stream=sample_rate -of csv=p=0 FL_L.wav)"
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echo " 文件数: $(ls *.wav | wc -l)"
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