Added a vrt library to pack and unpack from metadata.

Added a vrt test app that packs and unpacks the data.

2 files changed, 67 insertions, 0 deletions

diff --git a/host/include/uhd/transport/CMakeLists.txt b/host/include/uhd/transport/CMakeLists.txt
index ba8b33cc5..7f5db2128 100644
--- a/host/include/uhd/transport/CMakeLists.txt
+++ b/host/include/uhd/transport/CMakeLists.txt
@@ -20,5 +20,6 @@ INSTALL(FILES
     smart_buffer.hpp
     udp_simple.hpp
     udp_zero_copy.hpp
+    vrt.hpp
     DESTINATION ${HEADER_DIR}/uhd/transport
 )
diff --git a/host/include/uhd/transport/vrt.hpp b/host/include/uhd/transport/vrt.hpp
new file mode 100644
index 000000000..b56da4077
--- /dev/null
+++ b/host/include/uhd/transport/vrt.hpp
@@ -0,0 +1,66 @@
+//
+// Copyright 2010 Ettus Research LLC
+//
+// This program 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 of the License, or
+// (at your option) any later version.
+//
+// This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#include <uhd/metadata.hpp>
+#include <cstddef>
+
+#ifndef INCLUDED_UHD_TRANSPORT_VRT_HPP
+#define INCLUDED_UHD_TRANSPORT_VRT_HPP
+
+namespace uhd{ namespace transport{
+
+namespace vrt{
+
+    static const size_t max_header_words32 = 7;
+
+    /*!
+     * Pack a vrt header from metadata.
+     * \param metadata the tx metadata with flags and timestamps
+     * \param header_buff memory to write the packed vrt header
+     * \param num_header_words32 number of words in the vrt header
+     * \param num_payload_words32 the length of the payload
+     * \param packet_count the packet count sequence number
+     */
+    void pack(
+        const metadata_t &metadata, //input
+        uint32_t *header_buff,      //output
+        size_t &num_header_words32, //output
+        size_t num_payload_words32, //input
+        size_t packet_count         //input
+    );
+
+    /*!
+     * Unpack a vrt header to metadata.
+     * \param metadata the rx metadata with flags and timestamps
+     * \param header_buff memory to read the packed vrt header
+     * \param num_header_words32 number of words in the vrt header
+     * \param num_payload_words32 the length of the payload
+     * \param packet_count the packet count sequence number
+     */
+    void unpack(
+        metadata_t &metadata,            //output
+        const uint32_t *header_buff,     //input
+        size_t &num_header_words32,      //output
+        size_t &num_payload_words32,     //output
+        size_t &packet_count             //output
+    );
+
+} //namespace vrt
+
+}} //namespace
+
+#endif /* INCLUDED_UHD_TRANSPORT_VRT_HPP */