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#!perl -w
use strict;
use Imager;
# this is just to exercise the code, see the capture2image
# function below for the meat
my $from = shift;
my $to = shift;
my $width = shift || 320;
my $height = shift || 240;
$to or die "Usage: $0 from to [width [height]]\n";
my $data;
open RAWVIDEO, "< $from"
or die "Cannot open $from: $!\n";
binmode RAWVIDEO;
$data = do { local $/; <RAWVIDEO> };
close RAWVIDEO;
length $data >= $width * $height * 3
or die "Not enough data for video frame\n";
my $im = Imager->new(xsize=>$width, ysize=>$height);
capture2image($im, $data);
$im->write(file=>$to)
or die "Cannot save $to: $!\n";
use Inline C => <<'EOS' => WITH => 'Imager';
void
capture2image(Imager::ImgRaw out, unsigned char *data) {
i_color *line_buf = mymalloc(sizeof(i_color) * out->xsize);
i_color *pixelp;
int x, y;
for (y = 0; y < out->ysize; ++y) {
pixelp = line_buf;
for (x = 0; x < out->xsize; ++x) {
pixelp->rgba.b = *data++;
pixelp->rgba.g = *data++;
pixelp->rgba.r = *data++;
++pixelp;
}
i_plin(out, 0, out->xsize, y, line_buf);
}
myfree(line_buf);
}
EOS
__END__
=head1 NAME
inline_capture2image.pl - convert captured C<BGR> data to any Imager supported format
=head1 SYNOPSIS
perl inline_capture2image.pl rawbgr foo.ext
perl inline_capture2image.pl rawbgr foo.ext width
perl inline_capture2image.pl rawbgr foo.ext width height
=head1 DESCRIPTION
This was inspired by the discussion at
http://www.perlmonks.org/?node_id=539316 (Feeding video data to
Imager).
inline_capture2image.pl takes V4L raw captured image data and outputs
an image in any image format supported by Imager.
=head1 SEE ALSO
Imager, Imager::API
Perl and Video Capture
http://www.perlmonks.org/?node=474047
Feeding video data to Imager
http://www.perlmonks.org/?node_id=539316
=head1 AUTHOR
Tony Cook <tonyc@cpan.org>
=head1 REVISION
$Revision$
=cut
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