1 files changed, 81 insertions, 0 deletions
diff --git a/gr-blocks/include/blocks/file_meta_source.h b/gr-blocks/include/blocks/file_meta_source.h
new file mode 100644
index 000000000..a992d5243
--- /dev/null
+++ b/gr-blocks/include/blocks/file_meta_source.h
@@ -0,0 +1,81 @@
+/* -*- c++ -*- */
+/*
+ * 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.
+ */
+
+#ifndef INCLUDED_BLOCKS_FILE_META_SOURCE_H
+#define INCLUDED_BLOCKS_FILE_META_SOURCE_H
+
+#include <blocks/api.h>
+#include <gr_sync_block.h>
+
+namespace gr {
+  namespace blocks {
+
+    /*!
+     * \brief Reads stream from file with meta-data headers. Headers
+     * are parsed into tags.
+     * \ingroup source_blk
+     *
+     * The information in the metadata headers includes:
+     *
+     *   rx_rate (double): sample rate of data.
+     *   rx_time (uint64_t, double): time stamp of first sample in segment.
+     *   size (uint32_t): item size in bytes.
+     *   type (gr_file_types as int32_t): data type.
+     *   cplx (bool): Is data complex?
+     *   strt (uint64_t): Starting byte of data in this segment.
+     *   bytes (uint64_t): Size in bytes of data in this segment.
+     *
+     * Any item inside of the extra header dictionary is ready out and
+     * made into a stream tag.
+     */
+    class BLOCKS_API file_meta_source : virtual public gr_sync_block
+    {
+    public:
+      // gr::blocks::file_meta_source::sptr
+      typedef boost::shared_ptr<file_meta_source> sptr;
+
+      /*!
+       * \brief Create a meta-data file source.
+       *
+       * \param filename (string): Name of file to write data to.
+       * \param repeat (bool): Repeats file when EOF is found.
+       * \param detached_header (bool): Set to true if header
+       *    info is stored in a separate file (usually named filename.hdr)
+       * \param hdr_filename (string): Name of detached header file if used.
+       *    Defaults to 'filename.hdr' if detached_header is true but this
+       *    field is an empty string.
+       */
+      static sptr make(const std::string &filename,
+		       bool repeat=false,
+		       bool detached_header=false,
+		       const std::string &hdr_filename="");
+
+      virtual bool open(const std::string &filename,
+			const std::string &hdr_filename="") = 0;
+      virtual void close() = 0;
+      virtual void do_update() = 0;
+    };
+
+  } /* namespace blocks */
+} /* namespace gr */
+
+#endif /* INCLUDED_BLOCKS_FILE_META_SOURCE_H */