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add scripts for transcoding to opus (and mp3) and filename standardization (from fn)

--- /dev/null

+++ b/2mp3

@@ -1,0 +1,4 @@

+#!/bin/rc

+play -o /fd/1 >[2]/dev/null |\

+	audio/pcmconv -i s16r1c1 -o S16r1c1 |\

+	audio/mp3enc -r -v -q 0

--- /dev/null

+++ b/2opus

@@ -1,0 +1,15 @@

+#!/bin/rc

+l=(--bitrate 128)

+if(~ $1 -l){

+	l=()

+	shift

+}

+play -o /fd/1 >[2]/dev/null |\

+	audio/opusenc \

+		--quiet \

+		--music \

+		--downmix-stereo \

+		--raw \

+		--raw-rate 44100 \

+		$l \

+		- -

--- /dev/null

+++ b/aconv

@@ -1,0 +1,11 @@

+#!/bin/rc

+parm=()

+if(~ $1 -l){

+	parm=(-l)

+	shift

+}

+pref=$1

+for(i in $*(2-)){

+	echo $i

+	2opus $*(2-) <$i >`{echo $i | mfmt $pref opus}

+}

--- a/fn

+++ b/fn

@@ -1,10 +1,6 @@

 # audio

-# convert audio file to mp3

-fn 2mp3{ play -o /fd/1 >[2]/dev/null | audio/pcmconv -i s16r1c1 -o S16r1c1 | audio/mp3enc -q 0 }

 # playback samples from microphone (needs setup)

 fn admp{ dd -bs 4x441 </dev/audio >/dev/audio }

-# audio file name standardization

-fn mfmt{ sed $"*^';s/^''//;s/''$//;s/[\[\]\!,\(\)''\$\*\?:\;=]//g;s/\&/and/g;s/ - /./g;s/\.[^\.]+$/.mp3/;s/ /./g;s/\.\././g' | tr A-Z a-z }

 # decode audio files(s) and visualize with pplay(1)

 fn pcm{ @{o=(); while(~ $1 -?) o=($o $1) && shift; play -o /fd/1 $* >[2]/dev/null | pplay $o}}

 # same, without temporary viariables (???)

--- /dev/null

+++ b/mfmt

@@ -1,0 +1,15 @@

+#!/bin/rc

+pref=$1

+fmt=$2

+sed \

+	$pref^'

+	s/^''//

+	s/''$//

+	s/[\[\]\!,\(\)''\$\*\?:\;=]//g

+	s/\&/and/g

+	s/( - | |_)/./g

+	s/\.[^\.]+$/.'^$fmt^'/

+	s/ /./g

+	s/\.\././g

+' |\

+	tr A-Z a-z