From 893af3dc280a5d85be2a5beb266dba9bb538292c Mon Sep 17 00:00:00 2001
From: Josh Blum <josh@joshknows.com>
Date: Tue, 7 Feb 2012 11:59:42 -0800
Subject: uhd: added sc8 conversion tests

---
 host/lib/convert/convert_with_tables.cpp | 71 +++++++++++++++++++++++++++++++-
 1 file changed, 70 insertions(+), 1 deletion(-)

(limited to 'host/lib/convert/convert_with_tables.cpp')

diff --git a/host/lib/convert/convert_with_tables.cpp b/host/lib/convert/convert_with_tables.cpp
index 2379739a7..4a3ce29b2 100644
--- a/host/lib/convert/convert_with_tables.cpp
+++ b/host/lib/convert/convert_with_tables.cpp
@@ -1,5 +1,5 @@
 //
-// Copyright 2011 Ettus Research LLC
+// Copyright 2011-2012 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
@@ -26,6 +26,55 @@ static const size_t sc16_table_len = size_t(1 << 16);
 
 typedef boost::uint16_t (*tohost16_type)(boost::uint16_t);
 
+/***********************************************************************
+ * Implementation for sc16 to sc8 lookup table
+ *  - Lookup the real and imaginary parts individually
+ **********************************************************************/
+template <bool swap>
+class convert_sc16_1_to_sc8_item32_1 : public converter{
+public:
+    convert_sc16_1_to_sc8_item32_1(void): _table(sc16_table_len){}
+
+    void set_scalar(const double scalar){
+        for (size_t i = 0; i < sc16_table_len; i++){
+            const boost::int16_t val = boost::uint16_t(i);
+            _table[i] = boost::int8_t(boost::math::iround(val * scalar / 32767.));
+        }
+    }
+
+    void operator()(const input_type &inputs, const output_type &outputs, const size_t nsamps){
+        const sc16_t *input = reinterpret_cast<const sc16_t *>(inputs[0]);
+        item32_t *output = reinterpret_cast<item32_t *>(outputs[0]);
+
+        const size_t num_pairs = nsamps/2;
+        for (size_t i = 0, j = 0; i < num_pairs; i++, j+=2){
+            output[i] = this->lookup(input[j], input[j+1]);
+        }
+
+        if (nsamps != num_pairs*2){
+            output[num_pairs] = this->lookup(input[nsamps-1], 0);;
+        }
+    }
+
+    item32_t lookup(const sc16_t &in0, const sc16_t &in1){
+        if (swap){ //hope this compiles out, its a template constant
+            return
+            (item32_t(_table[size_t(in0.real())]) << 16) |
+            (item32_t(_table[size_t(in0.imag())]) << 24) |
+            (item32_t(_table[size_t(in1.real())]) << 0) |
+            (item32_t(_table[size_t(in1.imag())]) << 8) ;
+        }
+        return
+            (item32_t(_table[size_t(in0.real())]) << 8) |
+            (item32_t(_table[size_t(in0.imag())]) << 0) |
+            (item32_t(_table[size_t(in1.real())]) << 24) |
+            (item32_t(_table[size_t(in1.imag())]) << 16) ;
+    }
+
+private:
+    std::vector<boost::uint8_t> _table;
+};
+
 /***********************************************************************
  * Implementation for sc16 lookup table
  *  - Lookup the real and imaginary parts individually
@@ -121,9 +170,13 @@ private:
 #ifdef BOOST_BIG_ENDIAN
 #  define SHIFT_PAIR0 16, 0
 #  define SHIFT_PAIR1 0, 16
+#  define BE_SWAP false
+#  define LE_SWAP true
 #else
 #  define SHIFT_PAIR0 0, 16
 #  define SHIFT_PAIR1 16, 0
+#  define BE_SWAP true
+#  define LE_SWAP false
 #endif
 
 static converter::sptr make_convert_sc16_item32_be_1_to_fc32_1(void){
@@ -166,6 +219,14 @@ static converter::sptr make_convert_sc8_item32_le_1_to_sc16_1(void){
     return converter::sptr(new convert_sc8_item32_1_to_fcxx_1<s16_t, uhd::wtohx, SHIFT_PAIR0>());
 }
 
+static converter::sptr make_convert_sc16_1_to_sc8_item32_be_1(void){
+    return converter::sptr(new convert_sc16_1_to_sc8_item32_1<BE_SWAP>());
+}
+
+static converter::sptr make_convert_sc16_1_to_sc8_item32_le_1(void){
+    return converter::sptr(new convert_sc16_1_to_sc8_item32_1<LE_SWAP>());
+}
+
 UHD_STATIC_BLOCK(register_convert_sc16_item32_1_to_fcxx_1){
     uhd::convert::id_type id;
     id.num_inputs = 1;
@@ -210,4 +271,12 @@ UHD_STATIC_BLOCK(register_convert_sc16_item32_1_to_fcxx_1){
     id.output_format = "sc16";
     id.input_format = "sc8_item32_le";
     uhd::convert::register_converter(id, &make_convert_sc8_item32_le_1_to_sc16_1, PRIORITY_TABLE);
+
+    id.output_format = "sc16";
+    id.input_format = "sc8_item32_be";
+    uhd::convert::register_converter(id, &make_convert_sc16_1_to_sc8_item32_be_1, PRIORITY_TABLE);
+
+    id.output_format = "sc16";
+    id.input_format = "sc8_item32_le";
+    uhd::convert::register_converter(id, &make_convert_sc16_1_to_sc8_item32_le_1, PRIORITY_TABLE);
 }
-- 
cgit v1.2.3