#!/usr/bin/perl
#     DVB firmware extractor
#
#     (c) 2004 Andrew de Quincey
#
#     This program is free software; you can redistribute it and/or modify
#       it under the terms of the GNU General Public License as published by
#       the Free Software Foundation; either version 2 of the License, or
#       (at your option) any later version.
#
#     This program is distributed in the hope that it will be useful,
#       but WITHOUT ANY WARRANTY; without even the implied warranty of
#       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#
#     GNU General Public License for more details.
#
#     You should have received a copy of the GNU General Public License
#       along with this program; if not, write to the Free Software
#       Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

use File::Temp qw/ tempdir /;
use IO::Handle;

@components = ( "sp8870", "sp887x", "tda10045", "tda10046", "av7110", "dec2000t",
		"dec2540t", "dec3000s", "vp7041", "dibusb", "nxt2002" );

# Check args
syntax() if (scalar(@ARGV) != 1);
$cid = $ARGV[0];

# Do it!
for($i=0; $i < scalar(@components); $i++) {
    if ($cid eq $components[$i]) {
	$outfile = eval($cid);
	die $@ if $@;
	print STDERR "Firmware $outfile extracted successfully. Now copy it to either /lib/firmware or /usr/lib/hotplug/firmware/ (depending on your hotplug version).\n";
	exit(0);
    }
}

# If we get here, it wasn't found
print STDERR "Unknown component \"$cid\"\n";
syntax();




# ---------------------------------------------------------------
# Firmware-specific extraction subroutines

sub sp8870 {
    my $sourcefile = "tt_Premium_217g.zip";
    my $url = "http://www.technotrend.de/new/217g/$sourcefile";
    my $hash = "53970ec17a538945a6d8cb608a7b3899";
    my $outfile = "dvb-fe-sp8870.fw";
    my $tmpdir = tempdir(DIR => "/tmp", CLEANUP => 1);

    checkstandard();

    wgetfile($sourcefile, $url);
    unzip($sourcefile, $tmpdir);
    verify("$tmpdir/software/OEM/HE/App/boot/SC_MAIN.MC", $hash);
    copy("$tmpdir/software/OEM/HE/App/boot/SC_MAIN.MC", $outfile);

    $outfile;
}

sub sp887x {
    my $sourcefile = "Dvbt1.3.57.6.zip";
    my $url = "http://www.avermedia.com/software/$sourcefile";
    my $cabfile = "DVBT Net  Ver1.3.57.6/disk1/data1.cab";
    my $hash = "237938d53a7f834c05c42b894ca68ac3";
    my $outfile = "dvb-fe-sp887x.fw";
    my $tmpdir = tempdir(DIR => "/tmp", CLEANUP => 1);

    checkstandard();
    checkunshield();

    wgetfile($sourcefile, $url);
    unzip($sourcefile, $tmpdir);
    unshield("$tmpdir/$cabfile", $tmpdir);
    verify("$tmpdir/sc_main.mc", $hash);
    copy("$tmpdir/sc_main.mc", $outfile);

    $outfile;
}

sub tda10045 {
    my $sourcefile = "tt_budget_217g.zip";
    my $url = "http://www.technotrend.de/new/217g/$sourcefile";
    my $hash = "2105fd5bf37842fbcdfa4bfd58f3594a";
    my $outfile = "dvb-fe-tda10045.fw";
    my $tmpdir = tempdir(DIR => "/tmp", CLEANUP => 1);

    checkstandard();

    wgetfile($sourcefile, $url);
    unzip($sourcefile, $tmpdir);
    extract("$tmpdir/software/OEM/PCI/App/ttlcdacc.dll", 0x37ef9, 30555, "$tmpdir/fwtmp");
    verify("$tmpdir/fwtmp", $hash);
    copy("$tmpdir/fwtmp", $outfile);

    $outfile;
}

sub tda10046 {
    my $sourcefile = "tt_budget_217g.zip";
    my $url = "http://www.technotrend.de/new/217g/$sourcefile";
    my $hash = "a25b579e37109af60f4a36c37893957c";
    my $outfile = "dvb-fe-tda10046.fw";
    my $tmpdir = tempdir(DIR => "/tmp", CLEANUP => 1);

    checkstandard();

    wgetfile($sourcefile, $url);
    unzip($sourcefile, $tmpdir);
    extract("$tmpdir/software/OEM/PCI/App/ttlcdacc.dll", 0x3f731, 24479, "$tmpdir/fwtmp");
    verify("$tmpdir/fwtmp", $hash);
    copy("$tmpdir/fwtmp", $outfile);

    $outfile;
}

sub av7110 {
    my $sourcefile = "dvb-ttpci-01.fw-261c";
    my $url = "http://www.linuxtv.org/download/dvb/firmware/$sourcefile";
    my $hash = "7b263de6b0b92d2347319c65adc7d4fb";
    my $outfile = "dvb-ttpci-01.fw";

    checkstandard();

    wgetfile($sourcefile, $url);
    verify($sourcefile, $hash);
    copy($sourcefile, $outfile);

    $outfile;
}

sub dec2000t {
    my $sourcefile = "dec217g.exe";
    my $url = "http://hauppauge.lightpath.net/de/$sourcefile";
    my $hash = "bd86f458cee4a8f0a8ce2d20c66215a9";
    my $outfile = "dvb-ttusb-dec-2000t.fw";
    my $tmpdir = tempdir(DIR => "/tmp", CLEANUP => 1);

    checkstandard();

    wgetfile($sourcefile, $url);
    unzip($sourcefile, $tmpdir);
    verify("$tmpdir/software/OEM/STB/App/Boot/STB_PC_T.bin", $hash);
    copy("$tmpdir/software/OEM/STB/App/Boot/STB_PC_T.bin", $outfile);

    $outfile;
}

sub dec2540t {
    my $sourcefile = "dec217g.exe";
    my $url = "http://hauppauge.lightpath.net/de/$sourcefile";
    my $hash = "53e58f4f5b5c2930beee74a7681fed92";
    my $outfile = "dvb-ttusb-dec-2540t.fw";
    my $tmpdir = tempdir(DIR => "/tmp", CLEANUP => 1);

    checkstandard();

    wgetfile($sourcefile, $url);
    unzip($sourcefile, $tmpdir);
    verify("$tmpdir/software/OEM/STB/App/Boot/STB_PC_X.bin", $hash);
    copy("$tmpdir/software/OEM/STB/App/Boot/STB_PC_X.bin", $outfile);

    $outfile;
}

sub dec3000s {
    my $sourcefile = "dec217g.exe";
    my $url = "http://hauppauge.lightpath.net/de/$sourcefile";
    my $hash = "b013ececea83f4d6d8d2a29ac7c1b448";
    my $outfile = "dvb-ttusb-dec-3000s.fw";
    my $tmpdir = tempdir(DIR => "/tmp", CLEANUP => 1);

    checkstandard();

    wgetfile($sourcefile, $url);
    unzip($sourcefile, $tmpdir);
    verify("$tmpdir/software/OEM/STB/App/Boot/STB_PC_S.bin", $hash);
    copy("$tmpdir/software/OEM/STB/App/Boot/STB_PC_S.bin", $outfile);

    $outfile;
}

sub vp7041 {
    my $sourcefile = "2.422.zip";
    my $url = "http://www.twinhan.com/files/driver/USB-Ter/$sourcefile";
    my $hash = "e88c9372d1f66609a3e7b072c53fbcfe";
    my $outfile = "dvb-vp7041-2.422.fw";
    my $tmpdir = tempdir(DIR => "/tmp", CLEANUP => 1);

    checkstandard();

    wgetfile($sourcefile, $url);
    unzip($sourcefile, $tmpdir);
    extract("$tmpdir/VisionDTV/Drivers/Win2K&XP/UDTTload.sys", 12503, 3036, "$tmpdir/fwtmp1");
    extract("$tmpdir/VisionDTV/Drivers/Win2K&XP/UDTTload.sys", 2207, 10274, "$tmpdir/fwtmp2");

    my $CMD = "\000\001\000\222\177\000";
    my $PAD = "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000";
    my ($FW);
    open $FW, ">$tmpdir/fwtmp3";
    print $FW "$CMD\001$PAD";
    print $FW "$CMD\001$PAD";
    appendfile($FW, "$tmpdir/fwtmp1");
    print $FW "$CMD\000$PAD";
    print $FW "$CMD\001$PAD";
    appendfile($FW, "$tmpdir/fwtmp2");
    print $FW "$CMD\001$PAD";
    print $FW "$CMD\000$PAD";
    close($FW);

    verify("$tmpdir/fwtmp3", $hash);
    copy("$tmpdir/fwtmp3", $outfile);

    $outfile;
}

sub dibusb {
	my $url = "http://linuxtv.org/cgi-bin/cvsweb.cgi/dvb-kernel/firmware/dvb-dibusb-5.0.0.11.fw?rev=1.1&content-type=text/plain";
	my $outfile = "dvb-dibusb-5.0.0.11.fw";
	my $hash = "fa490295a527360ca16dcdf3224ca243";

	checkstandard();

	wgetfile($outfile, $url);
	verify($outfile,$hash);

	$outfile;
}

sub nxt2002 {
    my $sourcefile = "Broadband4PC_4_2_11.zip";
    my $url = "http://www.bbti.us/download/windows/$sourcefile";
    my $hash = "c6d2ea47a8f456d887ada0cfb718ff2a";
    my $outfile = "dvb-fe-nxt2002.fw";
    my $tmpdir = tempdir(DIR => "/tmp", CLEANUP => 1);

    checkstandard();
    
    wgetfile($sourcefile, $url);
    unzip($sourcefile, $tmpdir);
    verify("$tmpdir/SkyNETU.sys", $hash);
    extract("$tmpdir/SkyNETU.sys", 375832, 5908, $outfile);

    $outfile;
}

# ---------------------------------------------------------------
# Utilities

sub checkstandard {
    if (system("which unzip > /dev/null 2>&1")) {
	die "This firmware requires the unzip command - see ftp://ftp.info-zip.org/pub/infozip/UnZip.html\n";
    }
    if (system("which md5sum > /dev/null 2>&1")) {
	die "This firmware requires the md5sum command - see http://www.gnu.org/software/coreutils/\n";
    }
    if (system("which wget > /dev/null 2>&1")) {
	die "This firmware requires the wget command - see http://wget.sunsite.dk/\n";
    }
}

sub checkunshield {
    if (system("which unshield > /dev/null 2>&1")) {
	die "This firmware requires the unshield command - see http://sourceforge.net/projects/synce/\n";
    }
}

sub wgetfile {
    my ($sourcefile, $url) = @_;

    if (! -f $sourcefile) {
	system("wget -O \"$sourcefile\" \"$url\"") and die "wget failed - unable to download firmware";
    }
}

sub unzip {
    my ($sourcefile, $todir) = @_;

    $status = system("unzip -q -o -d \"$todir\" \"$sourcefile\" 2>/dev/null" );
    if ((($status >> 8) > 2) || (($status & 0xff) != 0)) {
	die ("unzip failed - unable to extract firmware");
    }
}

sub unshield {
    my ($sourcefile, $todir) = @_;

    system("unshield -d \"$todir\" \"$sourcefile\" > /dev/null" ) and die ("unshield failed - unable to extract firmware");
}

sub verify {
    my ($filename, $hash) = @_;
    my ($testhash);

    open(CMD, "md5sum \"$filename\"|");
    $testhash = <CMD>;
    $testhash =~ /([a-zA-Z0-9]*)/;
    $testhash = $1;
    close CMD;
    die "Hash of extracted file does not match!\n" if ($testhash ne $hash);
}

sub copy {
    my ($from, $to) = @_;

    system("cp -f \"$from\" \"$to\"") and die ("cp failed");
}

sub extract {
    my ($infile, $offset, $length, $outfile) = @_;
    my ($chunklength, $buf, $rcount);

    open INFILE, "<$infile";
    open OUTFILE, ">$outfile";
    sysseek(INFILE, $offset, SEEK_SET);
    while($length > 0) {
	# Calc chunk size
	$chunklength = 2048;
	$chunklength = $length if ($chunklength > $length);

	$rcount = sysread(INFILE, $buf, $chunklength);
	die "Ran out of data\n" if ($rcount != $chunklength);
	syswrite(OUTFILE, $buf);
	$length -= $rcount;
    }
    close INFILE;
    close OUTFILE;
}

sub appendfile {
    my ($FH, $infile) = @_;
    my ($buf);

    open INFILE, "<$infile";
    while(1) {
	$rcount = sysread(INFILE, $buf, 2048);
	last if ($rcount == 0);
	print $FH $buf;
    }
    close(INFILE);
}

sub syntax() {
    print STDERR "syntax: get_dvb_firmware <component>\n";
    print STDERR "Supported components:\n";
    for($i=0; $i < scalar(@components); $i++) {
	print STDERR "\t" . $components[$i] . "\n";
    }
    exit(1);
}
