core: adding Python files to easily parse header info of a file.

Also a utility script that you pass a filename to and it prints out the meta data.

2 files changed, 60 insertions, 0 deletions

diff --git a/gr-utils/src/python/CMakeLists.txt b/gr-utils/src/python/CMakeLists.txt
index 90caeb234..13fa06bbc 100644
--- a/gr-utils/src/python/CMakeLists.txt
+++ b/gr-utils/src/python/CMakeLists.txt
@@ -50,6 +50,7 @@ GR_PYTHON_INSTALL(
     gr_plot_short
     gr_plot_qt
     gr_filter_design
+    gr_read_file_metadata
     DESTINATION ${GR_RUNTIME_DIR}
     COMPONENT "utils"
 )
diff --git a/gr-utils/src/python/gr_read_file_metadata b/gr-utils/src/python/gr_read_file_metadata
new file mode 100644
index 000000000..657ad7c2b
--- /dev/null
+++ b/gr-utils/src/python/gr_read_file_metadata
@@ -0,0 +1,59 @@
+#!/usr/bin/env python
+#
+# Copyright 2012 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+import sys
+from optparse import OptionParser
+
+from gnuradio import gr
+from gnuradio import parse_file_metadata
+
+def main(filename):
+    handle = open(filename, "rb")
+
+    # just read out header bytes
+    header_str = handle.read(parse_file_metadata.HEADER_LENGTH)
+
+    # Convert from string to PMT (should be a dictionary)
+    try:
+        header = gr.pmt_deserialize_str(header_str)
+    except RuntimeError:
+        sys.stderr.write("Could not deserialize header: invalid or corrupt data file.\n")
+        sys.exit(1)
+    #gr.pmt_print(header)
+
+    info = parse_file_metadata.parse_header(header, True)
+    #print info
+
+if __name__ == "__main__":
+    usage="%prog: [options] filename"
+    description = "Read in a GNU Radio file with meta data, extracts the header and prints it."
+
+    parser = OptionParser(conflict_handler="resolve",
+                          usage=usage, description=description)
+    (options, args) = parser.parse_args ()
+
+    if(len(args) < 1):
+        sys.stderr.write("No filename given\n")
+        sys.exit(1)
+
+    filename = args[0]
+    main(filename)