arrayfire/test/approx2.cpp at master · arrayfire/arrayfire · GitHub

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/*******************************************************

* This file is distributed under 3-clause BSD license.

* The complete license agreement can be obtained at:

* http://arrayfire.com/licenses/BSD-3-Clause

********************************************************/

#include <af/algorithm.h>

#include <af/arith.h>

#include <af/data.h>

#include <af/defines.h>

#include <af/dim4.hpp>

#include <af/exception.h>

#include <af/gfor.h>

#include <af/random.h>

#include <af/signal.h>

#include <af/traits.hpp>

#include <gtest/gtest.h>

#include <testHelpers.hpp>

#include <string>

#include <vector>

using af::abs;

using af::approx2;

using af::array;

using af::cdouble;

using af::cfloat;

using af::dim4;

using af::dtype_traits;

using af::randu;

using af::seq;

using af::span;

using af::sum;

using std::abs;

using std::endl;

using std::string;

using std::vector;

template<typename T>

class Approx2 : public ::testing::Test {

public:

virtual void SetUp() {

SUPPORTED_TYPE_CHECK(T);

subMat0.push_back(af_make_seq(0, 4, 1));

subMat0.push_back(af_make_seq(2, 6, 1));

subMat0.push_back(af_make_seq(0, 2, 1));

}

vector<af_seq> subMat0;

};

// create a list of types to be tested

typedef ::testing::Types<float, double, cfloat, cdouble> TestTypes;

// register the type list

TYPED_TEST_SUITE(Approx2, TestTypes);

template<typename T>

void approx2Test(string pTestFile, const unsigned resultIdx,

const af_interp_type method, bool isSubRef = false,

const vector<af_seq>* seqv = NULL) {

SUPPORTED_TYPE_CHECK(T);

typedef typename dtype_traits<T>::base_type BT;

vector<dim4> numDims;

vector<vector<BT>> in;

vector<vector<T>> tests;

readTests<BT, T, float>(pTestFile, numDims, in, tests);

dim4 idims = numDims[0];

dim4 pdims = numDims[1];

dim4 qdims = numDims[2];

af_array inArray = 0;

af_array pos0Array = 0;

af_array pos1Array = 0;

af_array outArray = 0;

af_array tempArray = 0;

vector<T> input(in[0].begin(), in[0].end());

if (isSubRef) {

ASSERT_SUCCESS(af_create_array(&tempArray, &(input.front()),

idims.ndims(), idims.get(),

(af_dtype)dtype_traits<T>::af_type));

ASSERT_SUCCESS(

af_index(&inArray, tempArray, seqv->size(), &seqv->front()));

} else {

ASSERT_SUCCESS(af_create_array(&inArray, &(input.front()),

idims.ndims(), idims.get(),

(af_dtype)dtype_traits<T>::af_type));

}

ASSERT_SUCCESS(af_create_array(&pos0Array, &(in[1].front()), pdims.ndims(),

pdims.get(),

(af_dtype)dtype_traits<BT>::af_type));

ASSERT_SUCCESS(af_create_array(&pos1Array, &(in[2].front()), qdims.ndims(),

qdims.get(),

(af_dtype)dtype_traits<BT>::af_type));

ASSERT_SUCCESS(

af_approx2(&outArray, inArray, pos0Array, pos1Array, method, 0));

// Get result

T* outData = new T[tests[resultIdx].size()];

ASSERT_SUCCESS(af_get_data_ptr((void*)outData, outArray));

// Compare result

size_t nElems = tests[resultIdx].size();

bool ret = true;

for (size_t elIter = 0; elIter < nElems; ++elIter) {

ret = (abs(tests[resultIdx][elIter] - outData[elIter]) < 0.001);

ASSERT_EQ(true, ret) << tests[resultIdx][elIter] << "\t"

<< outData[elIter] << "at: " << elIter << endl;

}

// Delete

delete[] outData;

if (inArray != 0) af_release_array(inArray);

if (pos0Array != 0) af_release_array(pos0Array);

if (pos1Array != 0) af_release_array(pos1Array);

if (outArray != 0) af_release_array(outArray);

if (tempArray != 0) af_release_array(tempArray);

}

TYPED_TEST(Approx2, Approx2Nearest) {

approx2Test<TypeParam>(string(TEST_DIR "/approx/approx2.test"), 0,

AF_INTERP_NEAREST);

}

TYPED_TEST(Approx2, Approx2Linear) {

approx2Test<TypeParam>(string(TEST_DIR "/approx/approx2.test"), 1,

AF_INTERP_LINEAR);

}

TYPED_TEST(Approx2, NearestBatch) {

approx2Test<TypeParam>(string(TEST_DIR "/approx/approx2_batch.test"), 0,

AF_INTERP_NEAREST);

}

TYPED_TEST(Approx2, LinearBatch) {

approx2Test<TypeParam>(string(TEST_DIR "/approx/approx2_batch.test"), 1,

AF_INTERP_LINEAR);

}

// Test Argument Failure Cases

template<typename T>

void approx2ArgsTest(string pTestFile, const af_interp_type method,

const af_err err) {

SUPPORTED_TYPE_CHECK(T);

typedef typename dtype_traits<T>::base_type BT;

vector<dim4> numDims;

vector<vector<BT>> in;

vector<vector<T>> tests;

readTests<BT, T, float>(pTestFile, numDims, in, tests);

dim4 idims = numDims[0];

dim4 pdims = numDims[1];

dim4 qdims = numDims[2];

af_array inArray = 0;

af_array pos0Array = 0;

af_array pos1Array = 0;

af_array outArray = 0;

vector<T> input(in[0].begin(), in[0].end());

ASSERT_SUCCESS(af_create_array(&inArray, &(input.front()), idims.ndims(),

idims.get(),

(af_dtype)dtype_traits<T>::af_type));

ASSERT_SUCCESS(af_create_array(&pos0Array, &(in[1].front()), pdims.ndims(),

pdims.get(),

(af_dtype)dtype_traits<BT>::af_type));

ASSERT_SUCCESS(af_create_array(&pos1Array, &(in[2].front()), qdims.ndims(),

qdims.get(),

(af_dtype)dtype_traits<BT>::af_type));

ASSERT_EQ(err,

af_approx2(&outArray, inArray, pos0Array, pos1Array, method, 0));

if (inArray != 0) af_release_array(inArray);

if (pos0Array != 0) af_release_array(pos0Array);

if (pos1Array != 0) af_release_array(pos1Array);

if (outArray != 0) af_release_array(outArray);

}

TYPED_TEST(Approx2, Approx2NearestArgsPos3D) {

approx2ArgsTest<TypeParam>(string(TEST_DIR "/approx/approx2_pos3d.test"),

AF_INTERP_NEAREST, AF_ERR_SIZE);

}

TYPED_TEST(Approx2, Approx2LinearArgsPos3D) {

approx2ArgsTest<TypeParam>(string(TEST_DIR "/approx/approx2_pos3d.test"),

AF_INTERP_LINEAR, AF_ERR_SIZE);

}

TYPED_TEST(Approx2, Approx2NearestArgsPosUnequal) {

approx2ArgsTest<TypeParam>(string(TEST_DIR "/approx/approx2_unequal.test"),

AF_INTERP_NEAREST, AF_ERR_SIZE);

}

template<typename T>

void approx2ArgsTestPrecision(string pTestFile, const unsigned resultIdx,

const af_interp_type method) {

UNUSED(resultIdx);

SUPPORTED_TYPE_CHECK(T);

vector<dim4> numDims;

vector<vector<T>> in;

vector<vector<T>> tests;

readTests<T, T, float>(pTestFile, numDims, in, tests);

dim4 idims = numDims[0];

dim4 pdims = numDims[1];

dim4 qdims = numDims[2];

af_array inArray = 0;

af_array pos0Array = 0;

af_array pos1Array = 0;

af_array outArray = 0;

vector<T> input(in[0].begin(), in[0].end());

ASSERT_SUCCESS(af_create_array(&inArray, &(input.front()), idims.ndims(),

idims.get(),

(af_dtype)dtype_traits<T>::af_type));

ASSERT_SUCCESS(af_create_array(&pos0Array, &(in[1].front()), pdims.ndims(),

pdims.get(),

(af_dtype)dtype_traits<T>::af_type));

ASSERT_SUCCESS(af_create_array(&pos1Array, &(in[2].front()), qdims.ndims(),

qdims.get(),

(af_dtype)dtype_traits<T>::af_type));

if ((af_dtype)dtype_traits<T>::af_type == c32 ||

(af_dtype)dtype_traits<T>::af_type == c64) {

ASSERT_EQ(AF_ERR_ARG, af_approx2(&outArray, inArray, pos0Array,

pos1Array, method, 0));

} else {

ASSERT_SUCCESS(

af_approx2(&outArray, inArray, pos0Array, pos1Array, method, 0));

}

if (inArray != 0) af_release_array(inArray);

if (pos0Array != 0) af_release_array(pos0Array);

if (pos1Array != 0) af_release_array(pos1Array);

if (outArray != 0) af_release_array(outArray);

}

#define APPROX2_ARGSP(desc, file, resultIdx, method) \

TYPED_TEST(Approx2, desc) { \

approx2ArgsTestPrecision<TypeParam>( \

string(TEST_DIR "/approx/" #file ".test"), resultIdx, method); \

}

APPROX2_ARGSP(Approx2NearestArgsPrecision, approx2, 0, AF_INTERP_NEAREST);

APPROX2_ARGSP(Approx2LinearArgsPrecision, approx2, 1, AF_INTERP_LINEAR);

//////////////////////////////////// CPP ////////////////////////////////////

TEST(Approx2, CPP) {

const unsigned resultIdx = 1;

#define BT dtype_traits<float>::base_type

vector<dim4> numDims;

vector<vector<BT>> in;

vector<vector<float>> tests;

readTests<BT, float, float>(string(TEST_DIR "/approx/approx2.test"),

numDims, in, tests);

dim4 idims = numDims[0];

dim4 pdims = numDims[1];

dim4 qdims = numDims[2];

array input(idims, &(in[0].front()));

array pos0(pdims, &(in[1].front()));

array pos1(qdims, &(in[2].front()));

array output = approx2(input, pos0, pos1, AF_INTERP_LINEAR, 0);

// Get result

float* outData = new float[tests[resultIdx].size()];

output.host((void*)outData);

// Compare result

size_t nElems = tests[resultIdx].size();

bool ret = true;

for (size_t elIter = 0; elIter < nElems; ++elIter) {

ret = (std::abs(tests[resultIdx][elIter] - outData[elIter]) < 0.001);

ASSERT_EQ(true, ret) << tests[resultIdx][elIter] << "\t"

<< outData[elIter] << "at: " << elIter << endl;

}

// Delete

delete[] outData;

#undef BT

}

TEST(Approx2Cubic, CPP) {

const unsigned resultIdx = 0;

#define BT dtype_traits<float>::base_type

vector<dim4> numDims;

vector<vector<BT>> in;

vector<vector<float>> tests;

readTests<BT, float, float>(string(TEST_DIR "/approx/approx2_cubic.test"),

numDims, in, tests);

dim4 idims = numDims[0];

dim4 pdims = numDims[1];

dim4 qdims = numDims[2];

array input(idims, &(in[0].front()));

input = input.T();

array pos0(pdims, &(in[1].front()));

array pos1(qdims, &(in[2].front()));

pos0 = tile(pos0, 1, pos0.dims(0));

pos1 = tile(pos1.T(), pos1.dims(0));

array output = approx2(input, pos0, pos1, AF_INTERP_BICUBIC_SPLINE, 0).T();

// Get result

float* outData = new float[tests[resultIdx].size()];

output.host((void*)outData);

// Compare result

size_t nElems = tests[resultIdx].size();

bool ret = true;

float max = real(outData[0]), min = real(outData[0]);

for (int i = 1; i < (int)nElems; ++i) {

min = (real(outData[i]) < min) ? real(outData[i]) : min;

max = (real(outData[i]) > max) ? real(outData[i]) : max;

}

float range = max - min;

ASSERT_GT(range, 0.f);

for (size_t elIter = 0; elIter < nElems; ++elIter) {

ret = (std::abs(tests[resultIdx][elIter] - outData[elIter]) <

0.01 * range);

ASSERT_EQ(true, ret) << tests[resultIdx][elIter] << "\t"

<< outData[elIter] << "at: " << elIter << endl;

}

// Delete

delete[] outData;

#undef BT

}

TEST(Approx2, CPPNearestBatch) {

array input = randu(200, 100, 10);

array pos = input.dims(0) * randu(100, 100, 10);

array qos = input.dims(1) * randu(100, 100, 10);

array outBatch = approx2(input, pos, qos, AF_INTERP_NEAREST);

array outSerial(pos.dims());

for (int i = 0; i < pos.dims(2); i++) {

outSerial(span, span, i) =

approx2(input(span, span, i), pos(span, span, i),

qos(span, span, i), AF_INTERP_NEAREST);

}

array outGFOR(pos.dims());

gfor(seq i, pos.dims(2)) {

outGFOR(span, span, i) =

approx2(input(span, span, i), pos(span, span, i),

qos(span, span, i), AF_INTERP_NEAREST);

}

ASSERT_NEAR(0, sum<float>(abs(outBatch - outSerial)), 1e-3);

ASSERT_NEAR(0, sum<float>(abs(outBatch - outGFOR)), 1e-3);

}

TEST(Approx2, CPPLinearBatch) {

array input = randu(200, 100, 10);

array pos = input.dims(0) * randu(100, 100, 10);

array qos = input.dims(1) * randu(100, 100, 10);

array outBatch = approx2(input, pos, qos, AF_INTERP_LINEAR);

array outSerial(pos.dims());

for (int i = 0; i < pos.dims(2); i++) {

outSerial(span, span, i) =

approx2(input(span, span, i), pos(span, span, i),

qos(span, span, i), AF_INTERP_LINEAR);

}

array outGFOR(pos.dims());

gfor(seq i, pos.dims(2)) {

outGFOR(span, span, i) =

approx2(input(span, span, i), pos(span, span, i),

qos(span, span, i), AF_INTERP_LINEAR);

}

ASSERT_NEAR(0, sum<float>(abs(outBatch - outSerial)), 1e-3);

ASSERT_NEAR(0, sum<float>(abs(outBatch - outGFOR)), 1e-3);

}

TEST(Approx2, CPPNearestMaxDims) {

const size_t largeDim = 65535 * 32 + 1;

array input = randu(1, largeDim);

array pos = input.dims(0) * randu(1, 10);

array qos = input.dims(1) * randu(1, 10);

array out = approx2(input, pos, qos, AF_INTERP_NEAREST);

input = randu(1, 1, largeDim);

pos = input.dims(0) * randu(1, 1, largeDim);

qos = input.dims(1) * randu(1, 1, largeDim);

out = approx2(input, pos, qos, AF_INTERP_NEAREST);

input = randu(1, 1, 1, largeDim);

pos = input.dims(0) * randu(1, 1, 1, largeDim);

qos = input.dims(1) * randu(1, 1, 1, largeDim);

out = approx2(input, pos, qos, AF_INTERP_NEAREST);

SUCCEED();

}

TEST(Approx2, CPPLinearMaxDims) {

const size_t largeDim = 65535 * 32 + 1;

array input = randu(1, largeDim);

array pos = input.dims(0) * randu(1, 10);

array qos = input.dims(1) * randu(1, 10);

array out = approx2(input, pos, qos, AF_INTERP_LINEAR);

input = randu(1, 1, largeDim);

pos = input.dims(0) * randu(1, 1, largeDim);

qos = input.dims(1) * randu(1, 1, largeDim);

out = approx2(input, pos, qos, AF_INTERP_LINEAR);

input = randu(1, 1, 1, largeDim);

pos = input.dims(0) * randu(1, 1, 1, largeDim);

qos = input.dims(1) * randu(1, 1, 1, largeDim);

out = approx2(input, pos, qos, AF_INTERP_LINEAR);

SUCCEED();

}

TEST(Approx2, CPPCubicMaxDims) {

const size_t largeDim = 65535 * 32 + 1;

array input = randu(1, largeDim);

array pos = input.dims(0) * randu(1, 10);

array qos = input.dims(1) * randu(1, 10);

array out = approx2(input, pos, qos, AF_INTERP_BICUBIC);

input = randu(1, 1, largeDim);

pos = input.dims(0) * randu(1, 1, largeDim);

qos = input.dims(1) * randu(1, 1, largeDim);

out = approx2(input, pos, qos, AF_INTERP_BICUBIC);

input = randu(1, 1, 1, largeDim);

pos = input.dims(0) * randu(1, 1, 1, largeDim);

qos = input.dims(1) * randu(1, 1, 1, largeDim);

out = approx2(input, pos, qos, AF_INTERP_BICUBIC);

SUCCEED();

}

TEST(Approx2, OtherDimLinear) {

int start = 0;

int stop = 10000;

int step = 100;

int num = 1000;

array xi = af::tile(seq(start, stop, step), 1, 2, 2, 2);

array yi = af::tile(seq(start, stop, step), 1, 2, 2, 2);

array zi = 4 * xi * yi - 3 * xi;

array xo = af::round(step * randu(num, 2, 2, 2));

array yo = af::round(step * randu(num, 2, 2, 2));

array zo = 4 * xo * yo - 3 * xo;

for (int d = 1; d < 3; d++) {

dim4 rdims(0, 1, 2, 3);

rdims[0] = d;

rdims[d] = 0;

array zi_reordered =

reorder(zi, rdims[0], rdims[1], rdims[2], rdims[3]);

array xo_reordered =

reorder(xo, rdims[0], rdims[1], rdims[2], rdims[3]);

array yo_reordered =

reorder(yo, rdims[0], rdims[1], rdims[2], rdims[3]);

array zo_reordered =

approx2(zi_reordered, xo_reordered, d, start, step, yo_reordered,

d + 1, start, step, AF_INTERP_LINEAR);

rdims[d] = 0;

rdims[0] = d;

array res =

af::reorder(yo_reordered, rdims[0], rdims[1], rdims[2], rdims[3]);

ASSERT_NEAR(0, af::max<float>(af::abs(res - yo)), 1E-3);

}

TEST(Approx2, OtherDimCubic) {

float start = 0;

float stop = 100;

float step = 0.01;

int num = 1000;

array xi = af::tile(seq(start, stop, step), 1, 2, 2, 2);

array yi = af::tile(seq(start, stop, step), 1, 2, 2, 2);

array zi = 4 * sin(xi) * cos(yi);

array xo = af::round(step * randu(num, 2, 2, 2));

array yo = af::round(step * randu(num, 2, 2, 2));

array zo = 4 * sin(xo) * cos(yo);

for (int d = 1; d < 3; d++) {

dim4 rdims(0, 1, 2, 3);

rdims[0] = d;

rdims[d] = 0;

array zi_reordered =

reorder(zi, rdims[0], rdims[1], rdims[2], rdims[3]);

array xo_reordered =

reorder(xo, rdims[0], rdims[1], rdims[2], rdims[3]);

array yo_reordered =

reorder(yo, rdims[0], rdims[1], rdims[2], rdims[3]);

array zo_reordered =

approx2(zi_reordered, xo_reordered, d, start, step, yo_reordered,

d + 1, start, step, AF_INTERP_CUBIC);

rdims[d] = 0;

rdims[0] = d;

array res =

reorder(yo_reordered, rdims[0], rdims[1], rdims[2], rdims[3]);

ASSERT_NEAR(0, af::max<float>(af::abs(res - yo)), 1E-3);

}

TEST(Approx2, CPPUsage) {

//! [ex_signal_approx2]

// Input data array.

float input_vals[9] = {1.0, 1.0, 1.0, 2.0, 2.0, 2.0, 3.0, 3.0, 3.0};

array input(3, 3, input_vals);

// [3 3 1 1]

// 1.0000 2.0000 3.0000

// First array of positions to be found along the first dimension.

float pv0[4] = {0.5, 1.5, 0.5, 1.5};

array pos0(2, 2, pv0);

// [2 2 1 1]

// 0.5000 0.5000

// 1.5000 1.5000

// Second array of positions to be found along the second

// dimension.

float pv1[4] = {0.5, 0.5, 1.5, 1.5};

array pos1(2, 2, pv1);

// [2 2 1 1]

// 0.5000 1.5000

array interp = approx2(input, pos0, pos1);

// [2 2 1 1]

// 1.5000 2.5000

//! [ex_signal_approx2]

float expected_interp[4] = {1.5, 1.5, 2.5, 2.5};

array interp_gold(2, 2, expected_interp);

ASSERT_ARRAYS_EQ(interp, interp_gold);

}

TEST(Approx2, CPPUniformUsage) {

//! [ex_signal_approx2_uniform]

// Input data array.

float input_vals[9] = {1.0, 1.0, 1.0, 2.0, 2.0, 2.0, 3.0, 3.0, 3.0};

array input(3, 3, input_vals);

// [3 3 1 1]

// 1.0000 2.0000 3.0000

// First array of positions to be found along the interpolation

// dimension, `interp_dim0`.

float pv0[4] = {0.5, 1.5, 0.5, 1.5};

array pos0(2, 2, pv0);

// [2 2 1 1]

// 0.5000 0.5000

// 1.5000 1.5000

// Second array of positions to be found along the interpolation

// dimension, `interp_dim1`.

float pv1[4] = {0.5, 0.5, 1.5, 1.5};

array pos1(2, 2, pv1);

// [2 2 1 1]

// 0.5000 1.5000

// Define range of indices with which the input values will

// correspond along both dimensions to be interpolated.

const double idx_start_dim0 = 0.0;

const double idx_step_dim0 = 1.0;

const int interp_dim0 = 0;

const int interp_dim1 = 1;

array interp =

approx2(input, pos0, interp_dim0, idx_start_dim0, idx_step_dim0, pos1,

interp_dim1, idx_start_dim0, idx_step_dim0);

// [2 2 1 1]

// 1.5000 2.5000

//! [ex_signal_approx2_uniform]

float expected_interp[4] = {1.5, 1.5, 2.5, 2.5};

array interp_gold(2, 2, expected_interp);

ASSERT_ARRAYS_EQ(interp, interp_gold);

}

TEST(Approx2, CPPUniformOneDimIndices) {

float inv[9] = {10.0, 20.0, 30.0, 40.0, 50.0, 60.0, 70.0, 80.0, 90.0};

array input(dim4(3, 3), inv);

float p0[3] = {0.0, 1.0, 2.0};

float p1[3] = {0.0, 1.0, 2.0};

array pos0(dim4(3, 1), p0);

array pos1(dim4(3, 1), p1);

const int pos0_interp_grid_start = 0;

const double pos0_interp_grid_step = 1;

array interpolated =

approx2(input, pos0, 0, pos0_interp_grid_start, pos0_interp_grid_step,

pos1, 1, pos0_interp_grid_start, pos0_interp_grid_step);

float expected_interp[3] = {10.0, 50.0, 90.0};

array interpolated_gold(dim4(3, 1), expected_interp);

ASSERT_ARRAYS_EQ(interpolated, interpolated_gold);

}

TEST(Approx2, CPPUniformTwoDimIndices) {

float inv[9] = {10.0, 20.0, 30.0, 40.0, 50.0, 60.0, 70.0, 80.0, 90.0};

array input(dim4(3, 3), inv);

float p0[4] = {0, 2, 0, 2};

float p1[4] = {0, 0, 2, 2};

array pos0(dim4(2, 2), p0);

array pos1(dim4(2, 2), p1);

const int pos0_interp_grid_start = 0;

const double pos0_interp_grid_step = 1;

const int pos0_interp_dim = 0;

const int pos1_interp_dim = 1;

array interpolated =

approx2(input, pos0, pos0_interp_dim, pos0_interp_grid_start,

pos0_interp_grid_step, pos1, pos1_interp_dim,

pos0_interp_grid_start, pos0_interp_grid_step);

float expected_interp[4] = {10.0, 30.0, 70.0, 90.0};

array interpolated_gold(dim4(2, 2), expected_interp);

ASSERT_ARRAYS_EQ(interpolated, interpolated_gold);

}

TEST(Approx2, CPPUniformInvalidStepSize) {

try {

float inv[9] = {10.0, 20.0, 30.0, 40.0, 50.0, 60.0, 70.0, 80.0, 90.0};

array in(dim4(3, 3), inv);

float pv[3] = {0.0, -1.0, -2.0};

array pos(dim4(3, 1), pv);

const int pos0_interp_grid_start = -1;

const double pos0_interp_grid_step = 0;

const int pos0_interp_dim = 0;

const int pos1_interp_dim = 1;

array interpolated =

approx2(in, pos, pos0_interp_dim, pos0_interp_grid_start,

pos0_interp_grid_step, pos, pos1_interp_dim,

pos0_interp_grid_start, pos0_interp_grid_step);

FAIL() << "Expected af::exception\n";

} catch (af::exception& ex) { SUCCEED(); } catch (...) {

FAIL() << "Expected af::exception\n";

}

TEST(Approx2, CPPUniformColumnMajorInterpolation) {

float inv[9] = {10.0, 20.0, 30.0, 40.0, 50.0, 60.0, 70.0, 80.0, 90.0};

array input(dim4(3, 3), inv);

float p0[4] = {0, 2, 0, 2};

float p1[4] = {0, 0, 2, 2};

array pos0(dim4(2, 2), p0);

array pos1(dim4(2, 2), p1);

const int pos0_interp_dim = 0;

const int pos1_interp_dim = 1;

const int pos0_interp_grid_start = 0;

const double pos0_interp_grid_step = 1;

array first = approx2(input, pos0, pos0_interp_dim, pos0_interp_grid_start,

pos0_interp_grid_step, pos1, pos1_interp_dim,

pos0_interp_grid_start, pos0_interp_grid_step);

array second = approx2(input, pos1, pos1_interp_dim, pos0_interp_grid_start,

pos0_interp_grid_step, pos0, pos0_interp_dim,

pos0_interp_grid_start, pos0_interp_grid_step);

// Verify.

float expected_interp[4] = {10.0, 30.0, 70.0, 90.0};

array interpolated_gold(dim4(2, 2), expected_interp);

ASSERT_ARRAYS_EQ(first, interpolated_gold);

ASSERT_ARRAYS_EQ(first, second);

}

TEST(Approx2, CPPUniformRowMajorInterpolation) {

float inv[9] = {10.0, 20.0, 30.0, 40.0, 50.0, 60.0, 70.0, 80.0, 90.0};

array input(dim4(3, 3), inv);

float p0[4] = {0, 2, 0, 2};

float p1[4] = {0, 0, 2, 2};

array pos0(dim4(2, 2), p0);

array pos1(dim4(2, 2), p1);

const int pos0_interp_grid_start = 0;

const double pos0_interp_grid_step = 1;

array first =

approx2(input, pos0, 1, pos0_interp_grid_start, pos0_interp_grid_step,

pos1, 0, pos0_interp_grid_start, pos0_interp_grid_step);

array second =

approx2(input, pos1, 0, pos0_interp_grid_start, pos0_interp_grid_step,

pos0, 1, pos0_interp_grid_start, pos0_interp_grid_step);

// Verify.

float expected_interp[4] = {10.0, 70.0, 30.0, 90.0};

array interpolated_gold(dim4(2, 2), expected_interp);

ASSERT_ARRAYS_EQ(first, interpolated_gold);

ASSERT_ARRAYS_EQ(first, second);

}

TEST(Approx2, CPPEmptyPos) {

float inv[3] = {10.0, 20.0, 30.0};

array in(dim4(3, 1), inv);

array pos;

array interpolated = approx2(in, pos, pos);

ASSERT_TRUE(pos.isempty());

ASSERT_TRUE(interpolated.isempty());

}

TEST(Approx2, CPPEmptyInput) {

array in;

float pv[3] = {0.0, 1.0, 2.0};

array pos(dim4(3, 1), pv);

array interpolated = approx2(in, pos, pos);

ASSERT_TRUE(in.isempty());

ASSERT_TRUE(interpolated.isempty());

}

TEST(Approx2, CPPEmptyPosAndInput) {

array in;

array pos;

array interpolated = approx2(in, pos, pos);

ASSERT_TRUE(in.isempty());

ASSERT_TRUE(pos.isempty());

ASSERT_TRUE(interpolated.isempty());

}

template<typename T>

class Approx2V2 : public ::testing::Test {

protected:

typedef typename dtype_traits<T>::base_type BT;

vector<T> h_gold_cast;

vector<T> h_in_cast;

vector<BT> h_pos1_cast;

vector<BT> h_pos2_cast;

dim4 gold_dims;

dim4 in_dims;

dim4 pos1_dims;

dim4 pos2_dims;

af_array gold;

af_array in;

af_array pos1;

af_array pos2;

Approx2V2() : gold(0), in(0), pos1(0), pos2(0) {}

void SetUp() {}

void releaseArrays() {

if (pos2 != 0) { ASSERT_SUCCESS(af_release_array(pos2)); }

if (pos1 != 0) { ASSERT_SUCCESS(af_release_array(pos1)); }

if (in != 0) { ASSERT_SUCCESS(af_release_array(in)); }

if (gold != 0) { ASSERT_SUCCESS(af_release_array(gold)); }

}

void TearDown() { releaseArrays(); }

void setTestData(float* h_gold, dim4 gold_dims, float* h_in, dim4 in_dims,

float* h_pos1, dim4 pos1_dims, float* h_pos2,

dim4 pos2_dims) {

releaseArrays();

gold = 0;

in = 0;

pos1 = 0;

pos2 = 0;

this->gold_dims = gold_dims;

this->in_dims = in_dims;

this->pos1_dims = pos1_dims;

this->pos2_dims = pos2_dims;

for (int i = 0; i < gold_dims.elements(); ++i) {

h_gold_cast.push_back(static_cast<T>(h_gold[i]));

}

for (int i = 0; i < in_dims.elements(); ++i) {

h_in_cast.push_back(static_cast<T>(h_in[i]));

}

for (int i = 0; i < pos1_dims.elements(); ++i) {

h_pos1_cast.push_back(static_cast<BT>(h_pos1[i]));

}

for (int i = 0; i < pos2_dims.elements(); ++i) {

h_pos2_cast.push_back(static_cast<BT>(h_pos2[i]));

}

ASSERT_SUCCESS(af_create_array(&gold, &h_gold_cast.front(),

gold_dims.ndims(), gold_dims.get(),

(af_dtype)dtype_traits<T>::af_type));

ASSERT_SUCCESS(af_create_array(&in, &h_in_cast.front(), in_dims.ndims(),

in_dims.get(),

(af_dtype)dtype_traits<T>::af_type));

ASSERT_SUCCESS(af_create_array(&pos1, &h_pos1_cast.front(),

pos1_dims.ndims(), pos1_dims.get(),

(af_dtype)dtype_traits<BT>::af_type));

ASSERT_SUCCESS(af_create_array(&pos2, &h_pos2_cast.front(),

pos2_dims.ndims(), pos2_dims.get(),

(af_dtype)dtype_traits<BT>::af_type));

}

void testSpclOutArray(TestOutputArrayType out_array_type) {

SUPPORTED_TYPE_CHECK(T);

af_array out = 0;

TestOutputArrayInfo metadata(out_array_type);

genTestOutputArray(&out, gold_dims.ndims(), gold_dims.get(),

(af_dtype)dtype_traits<T>::af_type, &metadata);

ASSERT_SUCCESS(

af_approx2_v2(&out, in, pos1, pos2, AF_INTERP_LINEAR, 0));

ASSERT_SPECIAL_ARRAYS_EQ(gold, out, &metadata);

}

void testSpclOutArrayUniform(TestOutputArrayType out_array_type) {

SUPPORTED_TYPE_CHECK(T);

af_array out = 0;

TestOutputArrayInfo metadata(out_array_type);

genTestOutputArray(&out, gold_dims.ndims(), gold_dims.get(),

(af_dtype)dtype_traits<T>::af_type, &metadata);

ASSERT_SUCCESS(af_approx2_uniform_v2(&out, in, pos1, 0, 0.0, 1.0, pos2,

1, 0.0, 1.0, AF_INTERP_LINEAR, 0));

ASSERT_SPECIAL_ARRAYS_EQ(gold, out, &metadata);

}

};

TYPED_TEST_SUITE(Approx2V2, TestTypes);

class SimpleTestData {

public:

static const int h_gold_size = 4;

static const int h_in_size = 9;

static const int h_pos1_size = 4;

static const int h_pos2_size = 4;

vector<float> h_gold;

vector<float> h_in;

vector<float> h_pos1;

vector<float> h_pos2;

dim4 gold_dims;

dim4 in_dims;

dim4 pos1_dims;

dim4 pos2_dims;

public:

SimpleTestData()

: gold_dims(2, 2), in_dims(3, 3), pos1_dims(2, 2), pos2_dims(2, 2) {

float gold_arr[h_gold_size] = {1.5, 1.5, 2.5, 2.5};

float in_arr[h_in_size] = {1.0, 1.0, 1.0, 2.0, 2.0, 2.0, 3.0, 3.0, 3.0};

float pos1_arr[h_pos1_size] = {0.5, 1.5, 0.5, 1.5};

float pos2_arr[h_pos2_size] = {0.5, 0.5, 1.5, 1.5};

h_gold.assign(gold_arr, gold_arr + h_gold_size);

h_in.assign(in_arr, in_arr + h_in_size);

h_pos1.assign(pos1_arr, pos1_arr + h_pos1_size);

h_pos2.assign(pos2_arr, pos2_arr + h_pos2_size);

}

};

template<typename T>

class Approx2V2Simple : public Approx2V2<T> {

protected:

void SetUp() {

SUPPORTED_TYPE_CHECK(T);

SimpleTestData data;

this->setTestData(&data.h_gold.front(), data.gold_dims,

&data.h_in.front(), data.in_dims,

&data.h_pos1.front(), data.pos1_dims,

&data.h_pos2.front(), data.pos2_dims);

}

};

TYPED_TEST_SUITE(Approx2V2Simple, TestTypes);

TYPED_TEST(Approx2V2Simple, UseNullOutputArray) {

this->testSpclOutArray(NULL_ARRAY);

}

TYPED_TEST(Approx2V2Simple, UseFullExistingOutputArray) {

this->testSpclOutArray(FULL_ARRAY);

}

TYPED_TEST(Approx2V2Simple, UseExistingOutputSubArray) {

this->testSpclOutArray(SUB_ARRAY);

}

TYPED_TEST(Approx2V2Simple, UseReorderedOutputArray) {

this->testSpclOutArray(REORDERED_ARRAY);

}

TYPED_TEST(Approx2V2Simple, UniformUseNullOutputArray) {

this->testSpclOutArrayUniform(NULL_ARRAY);

}

TYPED_TEST(Approx2V2Simple, UniformUseFullExistingOutputArray) {

this->testSpclOutArrayUniform(FULL_ARRAY);

}

TYPED_TEST(Approx2V2Simple, UniformUseExistingOutputSubArray) {

this->testSpclOutArrayUniform(SUB_ARRAY);

}

TYPED_TEST(Approx2V2Simple, UniformUseReorderedOutputArray) {

this->testSpclOutArrayUniform(REORDERED_ARRAY);

}

class Approx2NullArgs : public ::testing::Test {

protected:

af_array out;

af_array in;

af_array pos1;

af_array pos2;

Approx2NullArgs() : out(0), in(0), pos1(0), pos2(0) {}

void SetUp() {

SimpleTestData data;

ASSERT_SUCCESS(af_create_array(&in, &data.h_in.front(),

data.in_dims.ndims(), data.in_dims.get(),

f32));

ASSERT_SUCCESS(af_create_array(&pos1, &data.h_pos1.front(),

data.pos1_dims.ndims(),

data.pos1_dims.get(), f32));

ASSERT_SUCCESS(af_create_array(&pos2, &data.h_pos2.front(),

data.pos2_dims.ndims(),

data.pos2_dims.get(), f32));

}

void TearDown() {

if (pos2 != 0) { ASSERT_SUCCESS(af_release_array(pos2)); }

if (pos1 != 0) { ASSERT_SUCCESS(af_release_array(pos1)); }

if (in != 0) { ASSERT_SUCCESS(af_release_array(in)); }

}

};

TEST_F(Approx2NullArgs, NullOutputPtr) {

af_array* out_ptr = 0;

ASSERT_EQ(AF_ERR_ARG, af_approx2(out_ptr, this->in, this->pos1, this->pos2,

AF_INTERP_LINEAR, 0.f));

}

TEST_F(Approx2NullArgs, NullInputArray) {

ASSERT_EQ(AF_ERR_ARG, af_approx2(&this->out, 0, this->pos1, this->pos2,

AF_INTERP_LINEAR, 0.f));

}

TEST_F(Approx2NullArgs, NullPos1Array) {

ASSERT_EQ(AF_ERR_ARG, af_approx2(&this->out, this->in, 0, this->pos2,

AF_INTERP_LINEAR, 0.f));

}

TEST_F(Approx2NullArgs, NullPos2Array) {

ASSERT_EQ(AF_ERR_ARG, af_approx2(&this->out, this->in, this->pos1, 0,

AF_INTERP_LINEAR, 0.f));

}

TEST_F(Approx2NullArgs, V2NullOutputPtr) {

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