mirror of
https://github.com/9001/copyparty.git
synced 2025-08-17 00:52:16 -06:00
61 lines
1.6 KiB
Bash
Executable file
61 lines
1.6 KiB
Bash
Executable file
#!/bin/bash
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set -e
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cat >/dev/null <<EOF
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a frame is 1152 samples
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1sec @ 48000 = 41.66 frames
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11 frames = 12672 samples = 0.264 sec
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22 frames = 25344 samples = 0.528 sec
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EOF
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fast=1
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fast=
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echo
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cd /dev/shm
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rm -f -- a.*.mp3 a.*.mp3.gz
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min=99999999
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for freq in 425; do # {400..500}
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for vol in 24; do # {10..30}
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for kbps in 32; do
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for fdur in 1124; do # {800..1200}
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for fdu2 in 1042; do # {800..1200}
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for ftyp in h; do # q h t l p
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for ofs1 in 801; do # {0..4096}
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for ofs2 in 0; do # {0..4096}
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for ofs3 in 0; do # {0..4096}
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for nores in --nores; do # '' --nores
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f=a.b$kbps$nores-f$freq-v$vol-$ftyp$fdur-$fdu2-o$ofs1-$ofs2-$ofs3
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sox -r48000 -Dn -r48000 -b16 -c2 -t raw s1.pcm synth 25344s sin $freq vol 0.$vol fade $ftyp ${fdur}s 25344s ${fdu2}s
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sox -r48000 -Dn -r48000 -b16 -c2 -t raw s0.pcm synth 12672s sin $freq vol 0
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tail -c +$ofs1 s0.pcm >s0a.pcm
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tail -c +$ofs2 s0.pcm >s0b.pcm
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tail -c +$ofs3 s0.pcm >s0c.pcm
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cat s{0a,1,0,0b,1,0c}.pcm > a.pcm
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lame --silent -r -s 48 --bitwidth 16 --signed a.pcm -m j --resample 48 -b $kbps -q 0 $nores $f.mp3
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if [ $fast ]
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then gzip -c <$f.mp3 >$f.mp3.gz
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else pigz -c11 -I1 <$f.mp3 >$f.mp3.gz
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fi
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sz=$(wc -c <$f.mp3.gz)
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printf '\033[A%d %s\033[K\n' $sz $f
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[ $sz -le $((min+10)) ] && echo
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[ $sz -le $min ] && echo && min=$sz
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done;done;done;done;done;done;done;done;done;done
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true
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f=a.b32--nores-f425-v24-h1124-1042-o801-0-0.mp3
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[ $fast ] &&
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pigz -c11 -I1 <$f >busy.mp3.gz ||
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mv $f.gz busy.mp3.gz
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sz=$(wc -c <busy.mp3.gz)
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[ "$sz" -eq 707 ] &&
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echo busy.mp3 built successfully ||
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echo WARNING: unexpected size of busy.mp3
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rm -f a.*.mp3 a.*.mp3.gz
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