#!/usr/bin/perl -w
-# Copyright © 2001 Jamie Zawinski <jwz@jwz.org>, all rights reserved.
+# Copyright © 2001-2007 Jamie Zawinski <jwz@jwz.org>.
#
# Permission to use, copy, modify, distribute, and sell this software and its
# documentation for any purpose is hereby granted without fee, provided that
# value of the "grabVideoFrames" setting in the ~/.xscreensaver file
# (or in /usr/lib/X11/app-defaults/XScreenSaver).
#
-# Created: 13-Apr-01.
+# Created: 13-Apr-2001.
require 5;
use diagnostics;
use strict;
my $progname = $0; $progname =~ s@.*/@@g;
-my $version = q{ $Revision: 1.6 $ }; $version =~ s/^[^0-9]+([0-9.]+).*$/$1/;
+my $version = q{ $Revision: 1.17 $ }; $version =~ s/^[^0-9]+([0-9.]+).*$/$1/;
+
+my $tmpdir = $ENV{TMPDIR} || "/tmp";
+my $tmpfile = sprintf("%s/xssv.%08x.ppm", $tmpdir, rand(0xFFFFFFFF));
+
+my $verbose = 0;
+my $use_stdout_p = 0;
+my $return_filename_p = 0;
-my $verbose = 0;
# These are programs that can be used to grab a video frame. The first one
# of these programs that exists on $PATH will be used, and the image file
-# is assumed to be written to stdout (in some image format acceptable to
+# is assumed to be written to $tmpfile (in some image format acceptable to
# "xscreensaver-getimage-file", e.g., PPM or JPEG.)
#
# If you add other programs to this list, please let me know!
#
-
-my $tmpdir = $ENV{TMPDIR};
-$tmpdir = "/tmp" unless $tmpdir;
-
-my $tmpfile = "$tmpdir/xssgv.$$.ppm";
-
-# this crap is because "vidtomem" can only write to a file, and uses
-# a stupid, non-overridable file name format.
-my $sgi_bogosity = "$tmpfile-00000.rgb";
-
my @programs = (
"bttvgrab -d q -Q -l 1 -o ppm -f $tmpfile", # BTTV
"qcam > $tmpfile", # Connectix Qcam
- "streamer -s 768x576 -o $tmpfile", # XawTV
+ "gqcam -t PPM -d $tmpfile", # GTK+ Qcam clone
+
+ "v4lctl snap ppm full $tmpfile", # XawTV 3.94.
+
+ "streamer -a -s 768x576 -o $tmpfile", # XawTV
+ # the "-a" option ("mute audio") arrived with XawTV 3.76.
+
"atitv snap $tmpfile", # ATI video capture card
- "vidtomem -f $tmpfile 2>&- && mv $sgi_bogosity $tmpfile", # Silicon Graphics
+ "grab -type ppm -format ntsc -source 1 " . # *BSD BT848 module
+ "-settle 0.75 -output $tmpfile",
+
+ "motioneye -j $tmpfile", # Sony Vaio MotionEye
+ # (hardware jpeg encoder)
+
+ "vidcat -b -f ppm -s 640x480 > $tmpfile 2>-", # w3cam/ovcam
+
+ "vidtomem -f $tmpfile 2>&- " . # Silicon Graphics
+ "&& mv $tmpfile-00000.rgb $tmpfile",
);
-sub error {
- ($_) = @_;
- print STDERR "$progname: $_\n";
+sub error($) {
+ my ($e) = @_;
+ print STDERR "$progname: $e\n";
exit 1;
}
-my $displayer = undef;
-
-sub pick_grabber {
+sub pick_grabber() {
my @names = ();
foreach my $cmd (@programs) {
foreach my $dir (split (/:/, $ENV{PATH})) {
print STDERR "$progname: checking $dir/$name\n" if ($verbose > 3);
if (-x "$dir/$name") {
- $displayer = $name;
return $cmd;
}
}
}
$names[$#names] = "or " . $names[$#names];
- error "none of: " . join (", ", @names) . " were found on \$PATH.";
+ error ("none of: " . join (", ", @names) . " were found on \$PATH.");
}
-my $use_stdout = 0;
-
-sub grab_image {
+sub grab_image() {
my $cmd = pick_grabber();
unlink $tmpfile;
if (-z $tmpfile)
{
unlink $tmpfile;
- error "\"$cmd\" produced no data.";
+ error ("\"$cmd\" produced no data.");
}
- if ($use_stdout) {
+ if ($return_filename_p) {
+ print STDERR "$progname: wrote \"$tmpfile\"\n" if ($verbose);
+ print STDOUT "$tmpfile\n";
+
+ } elsif ($use_stdout_p) {
local *IN;
my $ppm = "";
my $reader = "<$tmpfile";
# horrid kludge for SGIs, since they don't use PPM...
- if ($displayer eq "vidtomem") {
+ if ($cmd =~ m/^vidtomem\s/) {
$reader = "sgitopnm $tmpfile";
$reader .= " 2>/dev/null" if ($verbose <= 1);
$reader .= " |";
}
- open(IN, $reader) || error "reading $tmpfile: $!";
+ open(IN, $reader) || error ("reading $tmpfile: $!");
print STDERR "$progname: reading $tmpfile\n" if ($verbose > 1);
while (<IN>) { $ppm .= $_; }
close IN;
}
-sub usage {
- print STDERR "usage: $progname [--verbose] [--stdout]\n";
+sub usage() {
+ print STDERR "usage: $progname [--verbose] [--name | --stdout]\n";
exit 1;
}
-sub main {
+sub main() {
while ($_ = $ARGV[0]) {
shift @ARGV;
if ($_ eq "--verbose") { $verbose++; }
elsif (m/^-v+$/) { $verbose += length($_)-1; }
- elsif (m/^--?stdout$/) { $use_stdout = 1; }
+ elsif (m/^--?stdout$/) { $use_stdout_p = 1; }
+ elsif (m/^--?name$/) { $return_filename_p = 1; }
elsif (m/^-./) { usage; }
else { usage; }
}