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	audio_trim.rb - warvox - VoIP based wardialing tool, forked from rapid7/warvox.
	git clone git://jay.scot/warvox
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	---
	audio_trim.rb (876B)
	---
	1 #!/usr/bin/env ruby
	2 ###################
	3
	4 #
	5 # Load the library path
	6 #
	7 base = __FILE__
	8 while File.symlink?(base)
	9 base = File.expand_path(File.readlink(base), File.dirname(base))
	10 end
	11 $:.unshift(File.join(File.expand_path(File.dirname(base)), '..', 'lib'))
	12
	13 require 'warvox'
	14
	15 def usage
	16 $stderr.puts "Usage: #{$0} [offset] [length] <input.raw> <output.raw>"
	17 exit
	18 end
	19
	20 # TODO: Needs WAV header support
	21
	22 #
	23 # Script
	24 #
	25
	26 off = ARGV.shift
	27 len = ARGV.shift
	28 inp = ARGV.shift
	29 out = ARGV.shift
	30
	31 if (off and off == "-h") or not off
	32 usage()
	33 end
	34
	35 buf = ''
	36 ifd = nil
	37
	38 if inp
	39 ifd = ::File.open(inp, "rb")
	40 else
	41 $stdin.binmode
	42 ifd = $stdin
	43 end
	44
	45 ofd = nil
	46
	47 if out
	48 ofd = ::File.open(out, "wb")
	49 else
	50 $stdout.binmode
	51 ofd = $stdout
	52 end
	53
	54
	55 buf = ifd.read
	56 off = off.to_i * 16000
	57 len = (len.to_i > 0) ? len.to_i : (buf.length / 16000).to_i
	58
	59 ofd.write( buf[off, len * 16000] )
	60 exit(0)
	61
	62
	63