Adding information and convinience functions for accessing tag information.

2 files changed, 102 insertions, 0 deletions

diff --git a/gnuradio-core/src/lib/runtime/gr_tag_info.cc b/gnuradio-core/src/lib/runtime/gr_tag_info.cc
new file mode 100644
index 000000000..211f330e9
--- /dev/null
+++ b/gnuradio-core/src/lib/runtime/gr_tag_info.cc
@@ -0,0 +1,37 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2010 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <gr_tag_info.h>
+#include <gruel/pmt.h>
+
+namespace gr_tags {
+
+  const pmt::pmt_t s_key_time = pmt::pmt_string_to_symbol("time");
+  const pmt::pmt_t s_key_sample_rate = pmt::pmt_string_to_symbol("sample_rate");
+  const pmt::pmt_t s_key_frequency = pmt::pmt_string_to_symbol("frequency");
+  const pmt::pmt_t s_key_rssi = pmt::pmt_string_to_symbol("rssi");
+  const pmt::pmt_t s_key_rx_gain = pmt::pmt_string_to_symbol("gain");
+}
diff --git a/gnuradio-core/src/lib/runtime/gr_tag_info.h b/gnuradio-core/src/lib/runtime/gr_tag_info.h
new file mode 100644
index 000000000..af51cf6a9
--- /dev/null
+++ b/gnuradio-core/src/lib/runtime/gr_tag_info.h
@@ -0,0 +1,65 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2010 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_GR_TAG_INFO_H
+#define INCLUDED_GR_TAG_INFO_H
+
+#include <gruel/pmt.h>
+
+namespace gr_tags {
+
+  enum {
+    TAG_NITEM_REF = 0,
+    TAG_SRCID_REF,
+    TAG_KEY_REF,
+    TAG_VALUE_REF
+  };
+
+  extern const pmt::pmt_t s_key_time;
+  extern const pmt::pmt_t s_key_sample_rate;
+  extern const pmt::pmt_t s_key_frequency;
+  extern const pmt::pmt_t s_key_rssi;
+  extern const pmt::pmt_t s_key_gain;
+
+  static inline uint64_t
+  get_nitems(const pmt::pmt_t &tag) {
+    return pmt::pmt_to_uint64(pmt::pmt_tuple_ref(tag, TAG_NITEM_REF));
+  }
+  
+  static inline pmt::pmt_t
+  get_srcid(const pmt::pmt_t &tag) {
+    return pmt::pmt_tuple_ref(tag, TAG_SRCID_REF);
+  }
+  
+  static inline pmt::pmt_t
+  get_key(const pmt::pmt_t &tag) {
+    return pmt::pmt_tuple_ref(tag, TAG_KEY_REF);
+  }
+
+  static inline pmt::pmt_t
+  get_value(const pmt::pmt_t &tag) {
+    return pmt::pmt_tuple_ref(tag, TAG_VALUE_REF);
+  }
+
+}; /* namespace tags */
+
+#endif /* GR_TAG_INFO */