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Diffstat (limited to 'driver/xscreensaver-getimage-video')
| -rwxr-xr-x | driver/xscreensaver-getimage-video | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/driver/xscreensaver-getimage-video b/driver/xscreensaver-getimage-video new file mode 100755 index 0000000..dbc8986 --- /dev/null +++ b/driver/xscreensaver-getimage-video @@ -0,0 +1,144 @@ +#!/usr/bin/perl -w +# Copyright © 2001-2015 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 +# the above copyright notice appear in all copies and that both that +# copyright notice and this permission notice appear in supporting +# documentation. No representations are made about the suitability of this +# software for any purpose. It is provided "as is" without express or +# implied warranty. +# +# This program attempts to grab a single frame of video from the system's +# video capture card, and then load it on to the root window using the +# "xscreensaver-getimage-file" program. Various frame-grabbing programs +# are known, and the first one found is used. +# +# The various xscreensaver hacks that manipulate images ("slidescreen", +# "jigsaw", etc.) get the image to manipulate by running the +# "xscreensaver-getimage" program. +# +# The various screen savers invoke "xscreensaver-getimage", which will in +# turn invoke this program, depending on the value of the "grabVideoFrames" +# setting in the ~/.xscreensaver file (or in the app-defaults file, usually +# /usr/lib/X11/app-defaults/XScreenSaver). +# +# Created: 13-Apr-2001. + +require 5; +#use diagnostics; # Fails on some MacOS 10.5 systems +use strict; + +my $progname = $0; $progname =~ s@.*/@@g; +my $version = q{ $Revision: 1.23 $ }; $version =~ s/^[^0-9]+([0-9.]+).*$/$1/; + +my $tmpdir = $ENV{TMPDIR} || "/tmp"; +my $tmpfile = sprintf("%s/xssv.%08x.ppm", $tmpdir, rand(0xFFFFFFFF)); + +my $verbose = 0; + + +# 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 $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 @programs = ( + + "bttvgrab -d q -Q -l 1 -o ppm -f $tmpfile", # BTTV + "qcam > $tmpfile", # Connectix Qcam + "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 + + "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", + + # Maybe this works? + # "ffmpeg -i /dev/video0 -ss 00:00:01 -vframes 1 $tmpfile 2>&-", + + # "mplayer -really-quiet tv://0 " . # Maybe works with some cams? + # "-ao null -vo pnm -frames 1 2>&- " . + # "&& mv 00000001.ppm $tmpfile", + +); + + +sub error($) { + my ($e) = @_; + print STDERR "$progname: $e\n"; + exit 1; +} + +sub pick_grabber() { + my @names = (); + + foreach my $cmd (@programs) { + $_ = $cmd; + my ($name) = m/^([^ ]+)/; + push @names, "\"$name\""; + print STDERR "$progname: looking for $name...\n" if ($verbose > 2); + foreach my $dir (split (/:/, $ENV{PATH})) { + print STDERR "$progname: checking $dir/$name\n" if ($verbose > 3); + if (-x "$dir/$name") { + return $cmd; + } + } + } + + $names[$#names] = "or " . $names[$#names]; + error ("none of: " . join (", ", @names) . " were found on \$PATH."); +} + + +sub grab_image() { + my $cmd = pick_grabber(); + unlink $tmpfile; + + print STDERR "$progname: executing \"$cmd\"\n" if ($verbose); + system ($cmd); + + if (! -s $tmpfile) { + unlink $tmpfile; + error ("\"$cmd\" produced no data."); + } + + print STDERR "$progname: wrote \"$tmpfile\"\n" if ($verbose); + print STDOUT "$tmpfile\n"; +} + + +sub usage() { + print STDERR "usage: $progname [--verbose] [--name | --stdout]\n"; + exit 1; +} + +sub main() { + while ($_ = $ARGV[0]) { + shift @ARGV; + if (m/^--?verbose$/s) { $verbose++; } + elsif (m/^-v+$/s) { $verbose += length($_)-1; } + elsif (m/^--?name$/s) { } # ignored, for compatibility + elsif (m/^-./) { usage; } + else { usage; } + } + grab_image(); +} + +main; +exit 0; |