* samtools-0.1.7-2 (r520)

[samtools.git] / misc / samtools.pl

diff --git a/misc/samtools.pl b/misc/samtools.pl
index 320e8aaeda8ff2fab7fd91ab5e02073d5f3ba8fe..1d9cf59b2ebd84a6ccc5c3bbc8eb48718c555d90 100755 (executable)
--- a/misc/samtools.pl
+++ b/misc/samtools.pl
@@ -11,7 +11,7 @@ my $version = '0.3.3';
 
 my $command = shift(@ARGV);
 my %func = (showALEN=>\&showALEN, pileup2fq=>\&pileup2fq, varFilter=>\&varFilter,
-                       unique=>\&unique, uniqcmp=>\&uniqcmp, sra2hdr=>\&sra2hdr);
+                       unique=>\&unique, uniqcmp=>\&uniqcmp, sra2hdr=>\&sra2hdr, sam2fq=>\&sam2fq);
 
 die("Unknown command \"$command\".\n") if (!defined($func{$command}));
 &{$func{$command}};
@@ -226,6 +226,49 @@ sub p2q_print_str {
   }
 }
 
+#
+# sam2fq
+#
+
+sub sam2fq {
+  my %opts = (n=>20, p=>'');
+  getopts('n:p:', \%opts);
+  die("Usage: samtools.pl sam2fq [-n 20] [-p <prefix>] <inp.sam>\n") if (@ARGV == 0 && -t STDIN);
+  if ($opts{p} && $opts{n} > 1) {
+       my $pre = $opts{p};
+       my @fh;
+       for (0 .. $opts{n}-1) {
+         open($fh[$_], sprintf("| gzip > $pre.%.3d.fq.gz", $_)) || die;
+       }
+       my $i = 0;
+       while (<>) {
+         next if (/^@/);
+         chomp;
+         my @t = split("\t");
+         next if ($t[9] eq '*');
+         my ($name, $seq, $qual);
+         if ($t[1] & 16) { # reverse strand
+               $seq = reverse($t[9]);
+               $qual = reverse($t[10]);
+               $seq =~ tr/ACGTacgt/TGCAtgca/;
+         } else {
+               ($seq, $qual) = @t[9,10];
+         }
+         $name = $t[0];
+         $name .= "/1" if ($t[1] & 0x40);
+         $name .= "/2" if ($t[1] & 0x80);
+         print {$fh[$i]} "\@$name\n$seq\n";
+         if ($qual ne '*') {
+               print {$fh[$i]} "+\n$qual\n";
+         }
+         $i = 0 if (++$i == $opts{n});
+       }
+       close($fh[$_]) for (0 .. $opts{n}-1);
+  } else {
+       die("To be implemented.\n");
+  }
+}
+
 #
 # sra2hdr
 #