mp3_to_dl

一款MP3 Player Firmware 的原代码,非常有参考价值

#! /usr/bin/perl

# convert a MP3 file into a text-only format that may be download
# to the MP3 player's memory-only playback program.  The format is
# just uuencoded data in 4096 byte blocks, with the word "end" after
# the last line.

$ARGV[0] && $ARGV[1] || die "Usage: mp3_to_dl input.mp3 output.txt\n";
open(FIN, "$ARGV[0]") || die "Unable to read $ARGV[0]\n";
open(FOUT, ">$ARGV[1]") || die "Unable to write $ARGV[1]\n";
$len = -s $ARGV[0];

$block = 30;
while ($len > 0) {
	$num = 4096 - read(FIN, $data, 4096);
	$data .= pack("x$num") if $num > 0;
	print FOUT pack('u', $data);
	$len -= 4096;
}
print FOUT "end\n";
close FIN;
close FOUT;