uhd: Introduced filter API.

This is a unified API to access filters on USRP devices. Filters
can be accessed through the property tree, or multi_usrp.

2 files changed, 75 insertions, 0 deletions

diff --git a/host/lib/types/CMakeLists.txt b/host/lib/types/CMakeLists.txt
index 853da3fe2..821754386 100644
--- a/host/lib/types/CMakeLists.txt
+++ b/host/lib/types/CMakeLists.txt
@@ -91,4 +91,5 @@ LIBUHD_APPEND_SOURCES(
     ${CMAKE_CURRENT_SOURCE_DIR}/tune.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/types.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/wb_iface.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/filters.cpp
 )
diff --git a/host/lib/types/filters.cpp b/host/lib/types/filters.cpp
new file mode 100644
index 000000000..4ee06491f
--- /dev/null
+++ b/host/lib/types/filters.cpp
@@ -0,0 +1,74 @@
+//
+// Copyright 2015 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/types/filters.hpp>
+
+using namespace uhd;
+
+std::ostream& uhd::operator<<(std::ostream& os, filter_info_base& f)
+{
+    return os << f.to_pp_string();
+}
+
+std::string filter_info_base::to_pp_string()
+{
+    std::ostringstream os;
+    os << "[filter_info_base]" << std::endl;
+    switch(_type){
+        case ANALOG_LOW_PASS:
+            os << "type: " << "Analog Low-pass" << std::endl;
+            break;
+        case ANALOG_BAND_PASS:
+            os << "type: " << "Analog Band-pass" << std::endl;
+            break;
+        case DIGITAL_I16:
+            os << "type: " << "Digital (i16)" << std::endl;
+            break;
+        case DIGITAL_FIR_I16:
+            os << "type: " << "Digital FIR (i16)" << std::endl;
+            break;
+        default:
+            os << "type: " << "Unknown type!" << std::endl;
+            break;
+        }
+
+    os << "bypass enable: " << _bypass << std::endl
+        <<"position index: " << _position_index << std::endl;
+
+    std::string str =  os.str();
+    return str;
+}
+
+std::string analog_filter_base::to_pp_string()
+{
+    std::ostringstream os;
+    os << filter_info_base::to_pp_string() <<
+        "\t[analog_filter_base]" << std::endl <<
+        "\tdesc: " << _analog_type << std::endl;
+    return std::string(os.str());
+
+}
+
+std::string analog_filter_lp::to_pp_string()
+{
+    std::ostringstream os;
+    os << analog_filter_base::to_pp_string() <<
+        "\t\t[analog_filter_lp]" << std::endl <<
+        "\t\tcutoff: " << _cutoff << std::endl <<
+        "\t\trolloff: " << _rolloff << std::endl;
+    return std::string(os.str());
+}