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66 lines
1.6 KiB
Bash
Executable File
66 lines
1.6 KiB
Bash
Executable File
#!/bin/bash
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# 配置
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CHARS="▁▂▃▄▅▆▇█"
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BARS=10
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CONF="/tmp/waybar_cava_config"
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# 初始化
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len=$((${#CHARS}-1))
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idle_char="${CHARS:0:1}"
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idle_output=$(printf "%0.s$idle_char" $(seq 1 $BARS))
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# 生成 Cava 配置
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cat > "$CONF" <<EOF
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[general]
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bars = $BARS
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[input]
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method = pulse
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source = auto
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[output]
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method = raw
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raw_target = /dev/stdout
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data_format = ascii
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ascii_max_range = $len
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EOF
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cleanup() {
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trap - EXIT INT TERM
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pkill -P $$ 2>/dev/null
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echo "$idle_output"
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exit 0
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}
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trap cleanup EXIT INT TERM
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# 核心检测：是否存在未暂停的音频流
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is_audio_active() {
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pactl list sink-inputs 2>/dev/null | grep -q "Corked: no"
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}
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# 初始状态
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echo "$idle_output"
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while true; do
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# 如果存在未静音的音频
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if is_audio_active; then
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if ! pgrep -P $$ -x cava >/dev/null; then
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# 这里的 sed 字典是根据你的 CHARS 动态生成的
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sed_dict="s/;//g;"
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for ((i=0; i<=${len}; i++)); do
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sed_dict="${sed_dict}s/$i/${CHARS:$i:1}/g;"
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done
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cava -p "$CONF" 2>/dev/null | sed -u "$sed_dict" &
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fi
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# 正在播放时，稍微降低检查频率减少 CPU 占用
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sleep 1
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else
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if pgrep -P $$ -x cava >/dev/null; then
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pkill -P $$ -x cava 2>/dev/null
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wait 2>/dev/null
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echo "$idle_output"
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fi
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# 没声音时，使用 subscribe 等待事件，被动唤醒，不产生任何循环开销
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timeout 5s pactl subscribe 2>/dev/null | grep --line-buffered "sink-input" | head -n 1 >/dev/null
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fi
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done
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