mirror of
https://github.com/notwa/rc
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25 lines
861 B
Bash
Executable file
25 lines
861 B
Bash
Executable file
#!/usr/bin/zsh
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# script to make sense of compand's parameters
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# YES_ZSH
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compandy() { ### @-
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### generate compand arguments for ffmpeg audio filters.
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### this is kinda pointless now that acompressor is wildly supported.
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if [ $# -eq 0 ]; then
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echo -E "usage: $0 {threshold} {ratio} [attack] [release] [knee] [gain] [delay]"
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return 1
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fi
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local thresh="${1:-10}" ratio="${2:-2}"
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local atk="${3:-1}" rel="${4:-100}"
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local knee="${5:-1}" gain="${6:-0}" delay="${7:-0}"
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let 'atk/=1000.'
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let 'rel/=1000.'
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let 'delay/=1000.'
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local end= start=
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let 'end=thresh - thresh/(ratio + 0.0)'
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let 'start=thresh'
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printf "compand=%.5f|%.5f:%.5f|%.5f:%.1f/%.1f|0/%.2f:%.2f:%.2f:%.1f:%.5f" \
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$atk $atk $rel $rel $thresh $thresh $end $knee $gain $start $delay
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}
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[ "${SOURCING:-0}" -gt 0 ] || compandy "$@"
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