4 files changed, 196 insertions, 154 deletions
diff --git a/host/lib/transport/CMakeLists.txt b/host/lib/transport/CMakeLists.txt
index a74f7d527..872865d6c 100644
--- a/host/lib/transport/CMakeLists.txt
+++ b/host/lib/transport/CMakeLists.txt
@@ -44,8 +44,12 @@ LIBUHD_PYTHON_GEN_SOURCE(
     ${CMAKE_BINARY_DIR}/lib/transport/vrt.cpp
 )
 
+LIBUHD_PYTHON_GEN_SOURCE(
+    ${CMAKE_SOURCE_DIR}/lib/transport/gen_convert_types.py
+    ${CMAKE_BINARY_DIR}/lib/transport/convert_types.cpp
+)
+
 LIBUHD_APPEND_SOURCES(
-    ${CMAKE_SOURCE_DIR}/lib/transport/convert_types.cpp
     ${CMAKE_SOURCE_DIR}/lib/transport/if_addrs.cpp
     ${CMAKE_SOURCE_DIR}/lib/transport/udp_simple.cpp
     ${CMAKE_SOURCE_DIR}/lib/transport/udp_zero_copy_asio.cpp
diff --git a/host/lib/transport/convert_types.cpp b/host/lib/transport/convert_types.cpp
deleted file mode 100644
index 43503025a..000000000
--- a/host/lib/transport/convert_types.cpp
+++ /dev/null
@@ -1,152 +0,0 @@
-//
-// 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/config.hpp>
-#include <uhd/transport/convert_types.hpp>
-#include <uhd/utils/assert.hpp>
-#include <boost/asio.hpp> //endianness conversion
-#include <boost/cstdint.hpp>
-#include <complex>
-
-using namespace uhd;
-
-/***********************************************************************
- * Constants
- **********************************************************************/
-typedef std::complex<float>          fc32_t;
-
-static const float shorts_per_float = float(1 << 15);
-static const float floats_per_short = float(1.0/shorts_per_float);
-
-#define unrolled_loop(__inst, __len){ \
-    size_t __i = 0; \
-    for(; __i < (__len & ~0x3); __i+= 4){ \
-        __inst(__i+0); __inst(__i+1); \
-        __inst(__i+2); __inst(__i+3); \
-    } \
-    for(; __i < __len; __i++){ \
-        __inst(__i); \
-    } \
-}
-
-// set a boolean flag that indicates the endianess
-#ifdef HAVE_BIG_ENDIAN
-static const bool is_big_endian = true;
-#else
-static const bool is_big_endian = false;
-#endif
-
-static UHD_INLINE void host_floats_to_usrp2_items(
-    boost::uint32_t *usrp2_items,
-    const fc32_t *host_floats,
-    size_t num_samps
-){
-    #define host_floats_to_usrp2_items_i(i){ \
-        boost::uint16_t real = boost::int16_t(host_floats[i].real()*shorts_per_float); \
-        boost::uint16_t imag = boost::int16_t(host_floats[i].imag()*shorts_per_float); \
-        usrp2_items[i] = htonl((real << 16) | (imag << 0)); \
-    }
-    unrolled_loop(host_floats_to_usrp2_items_i, num_samps);
-}
-
-static UHD_INLINE void usrp2_items_to_host_floats(
-    fc32_t *host_floats,
-    const boost::uint32_t *usrp2_items,
-    size_t num_samps
-){
-    #define usrp2_items_to_host_floats_i(i){ \
-        boost::uint32_t item = ntohl(usrp2_items[i]); \
-        boost::int16_t real = boost::uint16_t(item >> 16); \
-        boost::int16_t imag = boost::uint16_t(item >> 0); \
-        host_floats[i] = fc32_t(float(real*floats_per_short), float(imag*floats_per_short)); \
-    }
-    unrolled_loop(usrp2_items_to_host_floats_i, num_samps);
-}
-
-static UHD_INLINE void host_items_to_usrp2_items(
-    boost::uint32_t *usrp2_items,
-    const boost::uint32_t *host_items,
-    size_t num_samps
-){
-    #define host_items_to_usrp2_items_i(i) usrp2_items[i] = htonl(host_items[i])
-    if (is_big_endian){
-        std::memcpy(usrp2_items, host_items, num_samps*sizeof(boost::uint32_t));
-    }
-    else{
-        unrolled_loop(host_items_to_usrp2_items_i, num_samps);
-    }
-}
-
-static UHD_INLINE void usrp2_items_to_host_items(
-    boost::uint32_t *host_items,
-    const boost::uint32_t *usrp2_items,
-    size_t num_samps
-){
-    #define usrp2_items_to_host_items_i(i) host_items[i] = ntohl(usrp2_items[i])
-    if (is_big_endian){
-        std::memcpy(host_items, usrp2_items, num_samps*sizeof(boost::uint32_t));
-    }
-    else{
-        unrolled_loop(usrp2_items_to_host_items_i, num_samps);
-    }
-}
-
-void transport::convert_io_type_to_otw_type(
-    const void *io_buff, const io_type_t &io_type,
-    void *otw_buff, const otw_type_t &otw_type,
-    size_t num_samps
-){
-    //all we handle for now:
-    UHD_ASSERT_THROW(otw_type.width == 16 and otw_type.byteorder == otw_type_t::BO_BIG_ENDIAN);
-
-    switch(io_type.tid){
-    case io_type_t::COMPLEX_FLOAT32:
-        host_floats_to_usrp2_items((boost::uint32_t *)otw_buff, (const fc32_t*)io_buff, num_samps);
-        return;
-    case io_type_t::COMPLEX_INT16:
-        host_items_to_usrp2_items((boost::uint32_t *)otw_buff, (const boost::uint32_t*)io_buff, num_samps);
-        return;
-     case io_type_t::CUSTOM_TYPE:
-        std::memcpy(otw_buff, io_buff, num_samps*io_type.size);
-        return;
-    default:
-        throw std::runtime_error(str(boost::format("convert_types: cannot handle type \"%c\"") % io_type.tid));
-    }
-}
-
-void transport::convert_otw_type_to_io_type(
-    const void *otw_buff, const otw_type_t &otw_type,
-    void *io_buff, const io_type_t &io_type,
-    size_t num_samps
-){
-    //all we handle for now:
-    UHD_ASSERT_THROW(otw_type.width == 16 and otw_type.byteorder == otw_type_t::BO_BIG_ENDIAN);
-
-    switch(io_type.tid){
-    case io_type_t::COMPLEX_FLOAT32:
-        usrp2_items_to_host_floats((fc32_t*)io_buff, (const boost::uint32_t *)otw_buff, num_samps);
-        return;
-    case io_type_t::COMPLEX_INT16:
-        usrp2_items_to_host_items((boost::uint32_t*)io_buff, (const boost::uint32_t *)otw_buff, num_samps);
-        return;
-    case io_type_t::CUSTOM_TYPE:
-        std::memcpy(io_buff, otw_buff, num_samps*io_type.size);
-        return;
-    default:
-        throw std::runtime_error(str(boost::format("convert_types: cannot handle type \"%c\"") % io_type.tid));
-    }
-}
diff --git a/host/lib/transport/gen_convert_types.py b/host/lib/transport/gen_convert_types.py
new file mode 100755
index 000000000..1b6b71e00
--- /dev/null
+++ b/host/lib/transport/gen_convert_types.py
@@ -0,0 +1,189 @@
+#!/usr/bin/env python
+#
+# 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/>.
+#
+
+TMPL_TEXT = """
+#import time
+/***********************************************************************
+ * This file was generated by $file on $time.strftime("%c")
+ **********************************************************************/
+
+\#include <uhd/config.hpp>
+\#include <uhd/transport/convert_types.hpp>
+\#include <uhd/utils/byteswap.hpp>
+\#include <boost/cstdint.hpp>
+\#include <boost/detail/endian.hpp>
+\#include <stdexcept>
+\#include <complex>
+
+//define the endian macros to convert integers
+\#ifdef BOOST_BIG_ENDIAN
+    \#define BE_MACRO(x) x
+    \#define LE_MACRO(x) uhd::byteswap(x)
+    static const bool is_big_endian = true;
+\#else
+    \#define BE_MACRO(x) uhd::byteswap(x)
+    \#define LE_MACRO(x) x
+    static const bool is_big_endian = false;
+\#endif
+
+using namespace uhd;
+
+/***********************************************************************
+ * Constants
+ **********************************************************************/
+typedef std::complex<float>          fc32_t;
+typedef std::complex<boost::int16_t> sc16_t;
+typedef boost::uint32_t              item32_t;
+
+static const float shorts_per_float = float(32767);
+static const float floats_per_short = float(1.0/shorts_per_float);
+
+/***********************************************************************
+ * Single-sample converters
+ **********************************************************************/
+template<typename outptr_type, typename inptr_type>
+static UHD_INLINE outptr_type conv_ptr(inptr_type inptr){
+    return reinterpret_cast<outptr_type>(inptr);
+}
+
+static UHD_INLINE item32_t sc16_to_item32(sc16_t num){
+    return *conv_ptr<item32_t*>(&num);
+}
+
+static UHD_INLINE sc16_t item32_to_sc16(item32_t item){
+    return *conv_ptr<sc16_t*>(&item);
+}
+
+static UHD_INLINE item32_t fc32_to_item32(fc32_t num){
+    return sc16_to_item32(sc16_t(
+        boost::int16_t(num.real()*shorts_per_float),
+        boost::int16_t(num.imag()*shorts_per_float)
+    ));
+}
+
+static UHD_INLINE fc32_t item32_to_fc32(item32_t item){
+    sc16_t num = item32_to_sc16(item); return fc32_t(
+        float(num.real()*floats_per_short),
+        float(num.imag()*floats_per_short)
+    );
+}
+
+/***********************************************************************
+ * Sample-buffer converters
+ **********************************************************************/
+UHD_INLINE boost::uint8_t get_pred(
+    const io_type_t &io_type,
+    const otw_type_t &otw_type
+){
+    boost::uint8_t pred = 0;
+
+    switch(otw_type.byteorder){
+    case otw_type_t::BO_BIG_ENDIAN:    pred |= $ph.be_p; break;
+    case otw_type_t::BO_LITTLE_ENDIAN: pred |= $ph.le_p; break;
+    ##let the compiler determine the native byte order (we could use python sys.byteorder)
+    case otw_type_t::BO_NATIVE:        pred |= (is_big_endian)? $ph.be_p : $ph.le_p; break;
+    default: throw std::runtime_error("unhandled byteorder type");
+    }
+
+    switch(otw_type.width){
+    case 16: pred |= $ph.w16_p; break;
+    default: throw std::runtime_error("unhandled bit width");
+    }
+
+    switch(io_type.tid){
+    case io_type_t::COMPLEX_INT16:   pred |= $ph.sc16_p; break;
+    case io_type_t::COMPLEX_FLOAT32: pred |= $ph.fc32_p; break;
+    default: throw std::runtime_error("unhandled io type id");
+    }
+
+    return pred;
+}
+
+void transport::convert_io_type_to_otw_type(
+    const void *io_buff, const io_type_t &io_type,
+    void *otw_buff, const otw_type_t &otw_type,
+    size_t num_samps
+){
+    switch(get_pred(io_type, otw_type)){
+    #for $pred in range(4)
+    case $pred:
+        #set $out_type = $ph.get_dev_type($pred)
+        #set $in_type = $ph.get_host_type($pred)
+        #set $converter = $in_type+"_to_"+$out_type
+        #set $xe_macro = $ph.get_xe_macro($pred)
+        for (size_t i = 0; i < num_samps; i++){
+            (($(out_type)_t *)otw_buff)[i] = $(xe_macro)($(converter)(((const $(in_type)_t *)io_buff)[i]));
+        }
+        break;
+    #end for
+    }
+}
+
+void transport::convert_otw_type_to_io_type(
+    const void *otw_buff, const otw_type_t &otw_type,
+    void *io_buff, const io_type_t &io_type,
+    size_t num_samps
+){
+    switch(get_pred(io_type, otw_type)){
+    #for $pred in range(4)
+    case $pred:
+        #set $out_type = $ph.get_host_type($pred)
+        #set $in_type = $ph.get_dev_type($pred)
+        #set $converter = $in_type+"_to_"+$out_type
+        #set $xe_macro = $ph.get_xe_macro($pred)
+        for (size_t i = 0; i < num_samps; i++){
+            (($(out_type)_t *)io_buff)[i] = $(converter)($(xe_macro)(((const $(in_type)_t *)otw_buff)[i]));
+        }
+        break;
+    #end for
+    }
+}
+
+"""
+
+def parse_tmpl(_tmpl_text, **kwargs):
+    from Cheetah.Template import Template
+    return str(Template(_tmpl_text, kwargs))
+
+class ph:
+    be_p   = 0b00001
+    le_p   = 0b00000
+    w16_p  = 0b00000
+    sc16_p = 0b00010
+    fc32_p = 0b00000
+
+    @staticmethod
+    def get_xe_macro(pred):
+        if (pred & ph.be_p) == ph.be_p: return 'BE_MACRO'
+        if (pred & ph.le_p) == ph.le_p: return 'LE_MACRO'
+        raise NotImplementedError
+
+    @staticmethod
+    def get_dev_type(pred):
+        if (pred & ph.w16_p) == ph.w16_p: return 'item32'
+        raise NotImplementedError
+
+    @staticmethod
+    def get_host_type(pred):
+        if (pred & ph.sc16_p) == ph.sc16_p: return 'sc16'
+        if (pred & ph.fc32_p) == ph.fc32_p: return 'fc32'
+        raise NotImplementedError
+
+if __name__ == '__main__':
+    import sys
+    open(sys.argv[1], 'w').write(parse_tmpl(TMPL_TEXT, file=__file__, ph=ph))
diff --git a/host/lib/transport/gen_vrt.py b/host/lib/transport/gen_vrt.py
index 6cac2ae08..6cdd6645d 100755
--- a/host/lib/transport/gen_vrt.py
+++ b/host/lib/transport/gen_vrt.py
@@ -33,10 +33,11 @@ TMPL_TEXT = """
 
 \#include <uhd/transport/vrt.hpp>
 \#include <uhd/utils/byteswap.hpp>
+\#include <boost/detail/endian.hpp>
 \#include <stdexcept>
 
 //define the endian macros to convert integers
-\#ifdef HAVE_BIG_ENDIAN
+\#ifdef BOOST_BIG_ENDIAN
     \#define BE_MACRO(x) (x)
     \#define LE_MACRO(x) uhd::byteswap(x)
 \#else