#!/usr/bin/perl -w

# launch a gst-launch pipeline for the supplied media file
# use the extension to determine the gst-launch pipeline
# make use of default output sinks

### packages

use File::Basename;

my (%pipes, %cfg);

sub extension
{
  my $path = shift;
  my $ext;

  # get only the bit after the last period.  We don't deal with
  # .tar.gz extensions do we ?
  if ($path =~ /\./)
  {
    my $ext = $path;
    $ext =~ s/^.*\.//;
  }
  else { $ext = ""; }

  return $ext;
}

sub read_config
{
  my $config_file = `echo -n ~`."/.gst";
  if (-e $config_file)
  {
    open CONFIG, $config_file;
    while (<CONFIG>)
    {
      chomp;
      s/#.*//;
      s/\s+$//;
      next unless length;
      my ($var, $value) = split (/\s*=\s*/, $_, 2);
      $cfg{$var} = $value;
    }
    if (!($cfg{AUDIOSINK}))
    {
      print "Please add an AUDIOSINK to $config_file !\n";
    }
    if (!($cfg{VIDEOSINK}))
    {
      print "Please add a VIDEOSINK to $config_file !\n";
    }
  }
  else
  {
    print "No configuration file $config_file found.  You might want to create one.\n";
  }
  if (!defined $cfg{AUDIOSINK})  { $cfg{AUDIOSINK} = "osssink"; }
  if (!defined $cfg{VIDEOSINK})  { $cfg{VIDEOSINK} = "colorspace ! xvideosink"; }
  if (!defined $cfg{CVS_PATH})   { $cfg{CVS_PATH} =  `echo -n ~`."/gst/cvs"; }
}

sub playfile($$)
{
    my ($file, $ext) = @_;
    $ext = lc $ext;

    my $pipe;
    if ($cfg{VISUALIZER} && ($pipe = $pipes{"vis." . $ext}))
    {
	$command = "gst-launch filesrc location=\"$file\" ! $pipe";
	print "Running $command\n";
	system ("PATH=\$PATH:".$cfg{CVS_PATH}."/gstreamer/tools $command");
    }
    elsif ($pipe = $pipes{$ext})
    {
	$command = "gst-launch filesrc location=\"$file\" ! $pipe";
	print "Running $command\n";
	system ("PATH=\$PATH:".$cfg{CVS_PATH}."/gstreamer/tools $command");
    }
    else
    {
	print "No suitable pipe found for extension $ext.\n";
    }
}

### main

read_config ();

%pipes = ( 
  "ac3", "a52dec ! $cfg{AUDIOSINK}",
  "au", "auparse ! $cfg{AUDIOSINK}",
  "avi", "avidemux video_%02d! { queue ! windec ! $cfg{VIDEOSINK} } avidemux0.audio_%02d! { queue ! mad ! $cfg{AUDIOSINK} }",
  "fli", "flxdec ! colorspace ! $cfg{VIDEOSINK}",
  "m1v", "mpegdemux video_%02d! { queue ! mpeg2dec ! $cfg{VIDEOSINK} }",
  "m2v", "mpegdemux video_%02d! { queue ! mpeg2dec ! $cfg{VIDEOSINK} }",
  "mod", "modplug !  $cfg{AUDIOSINK}",
  "mp2", "mad ! $cfg{AUDIOSINK}",
  "mp3", "mad ! $cfg{AUDIOSINK}",
  "mpg", "mpegdemux video_%02d! { queue ! mpeg2dec ! $cfg{VIDEOSINK} } mpegdemux0.audio_%02d! { queue ! mad ! $cfg{AUDIOSINK} }",
  "ogg", "vorbisdec ! $cfg{AUDIOSINK}",
  "sid", "siddec ! $cfg{AUDIOSINK}",
  "swf", "swfdec video_%02d! { queue ! colorspace ! $cfg{VIDEOSINK} }  swfdec0.audio_%02d! { queue ! $cfg{AUDIOSINK} }",
  "vob", "mpegdemux video_%02d! { queue ! mpeg2dec ! $cfg{VIDEOSINK} }  mpegdemux0.private_stream_1_%02d! { queue ! a52dec ! $cfg{AUDIOSINK} }",
  "wav", "wavparse ! $cfg{AUDIOSINK}",
);

if ($cfg{VISUALIZER}) {
  %pipes = (
    %pipes,
    "vis.mp3", "mad ! tee silent=true 'tee1.src0!' queue leaky=1 ! { $cfg{VISUALIZER} ! colorspace ! $cfg{VIDEOSINK} } 'tee1.src1!' $cfg{AUDIOSINK}",
    "vis.ogg", "vorbisdec ! tee silent=true 'tee1.src0!' queue leaky=1 ! { $cfg{VISUALIZER} ! colorspace ! $cfg{VIDEOSINK} } 'tee1.src1!' $cfg{AUDIOSINK}",
    "vis.wav", "wavparse ! tee silent=true 'tee1.src0!' queue leaky=1 ! { $cfg{VISUALIZER} ! colorspace ! $cfg{VIDEOSINK} } 'tee1.src1!' $cfg{AUDIOSINK}",
  );
}              

if ($#ARGV == -1) {
    print STDERR "Usage: gst-launch-ext filename[s]\n";
    exit 1;
}

my $file;
while ($file = shift @ARGV) {
    my $ext = extension ($file);
    if ($ext eq 'm3u')
    {
	open (PLAYLIST, '<', $file);
	my $file2;
	while ($file2 = <PLAYLIST>) {
	    chomp $file2;
	    my $ext2 = extension ($file2);
	    playfile($file2, $ext2);
	}
	close PLAYLIST;
    } else {
	playfile($file, $ext);
    }
}