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/*
Copyright 2018 Google Inc. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS-IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#include "base/channel_view.h"
#include <vector>
#include "third_party/googletest/googletest/include/gtest/gtest.h"
#include "base/audio_buffer.h"
namespace vraudio {
namespace {
const float kTestData[] = {0.0f, 1.0f, 2.0f};
const size_t kTestDataSize = sizeof(kTestData) / sizeof(float);
typedef std::vector<float> Buffer;
// Tests initialization of |ChannelView| class.
TEST(ChannelView, InitializationTest) {
AudioBuffer test_buffer(1, kTestDataSize);
ChannelView& test_buffer_view = test_buffer[0];
for (size_t i = 0; i < kTestDataSize; ++i) {
test_buffer_view[i] = kTestData[i];
}
EXPECT_EQ(test_buffer.num_frames(), test_buffer_view.size());
EXPECT_EQ(&test_buffer[0][0], test_buffer_view.begin());
EXPECT_EQ(&test_buffer[0][0] + test_buffer.num_frames(),
test_buffer_view.end());
}
// Tests iterators and array subscript of |ChannelView|.
TEST(ChannelView, IteratorAndArraySubscriptTest) {
AudioBuffer test_buffer(1, kTestDataSize);
ChannelView& test_buffer_view = test_buffer[0];
for (size_t i = 0; i < kTestDataSize; ++i) {
test_buffer_view[i] = kTestData[i];
}
for (size_t i = 0; i < test_buffer_view.size(); i++) {
EXPECT_EQ(test_buffer[0][i], test_buffer_view[i]);
EXPECT_EQ(kTestData[i], test_buffer_view[i]);
}
// Test range-based for-loops.
for (float& sample : test_buffer_view) {
sample *= 2.0f;
}
size_t idx = 0;
for (const float& sample : test_buffer_view) {
EXPECT_EQ(kTestData[idx] * 2.0f, sample);
++idx;
}
}
// Tests copy-assignment operators.
TEST(ChannelView, CopyAssignmentTest) {
AudioBuffer test_buffer(1, kTestDataSize);
ChannelView& test_buffer_view = test_buffer[0];
for (size_t i = 0; i < kTestDataSize; ++i) {
test_buffer_view[i] = kTestData[i];
}
AudioBuffer target_buffer(1, kTestDataSize);
ChannelView& target_vector_view = target_buffer[0];
for (size_t i = 0; i < kTestDataSize; ++i) {
target_vector_view[i] = -1.0f;
}
// Copy assignment from ChannelView.
target_vector_view = test_buffer_view;
for (size_t i = 0; i < test_buffer_view.size(); i++) {
EXPECT_EQ(test_buffer_view[i], target_vector_view[i]);
}
AudioBuffer target2_buffer(1, kTestDataSize);
ChannelView& target2_vector_view = target2_buffer[0];
for (size_t i = 0; i < kTestDataSize; ++i) {
target2_vector_view[i] = -1.0f;
}
// Copy assignment from AudioBuffer channel.
target2_vector_view = test_buffer[0];
for (size_t i = 0; i < test_buffer_view.size(); i++) {
EXPECT_EQ(test_buffer[0][i], target2_vector_view[i]);
}
}
// Tests addition-assignment operator.
TEST(ChannelView, AdditionOperatorTest) {
// Here an AudioBuffer is used to ensure that the data is aligned.
AudioBuffer test_buffer(1, kTestDataSize);
ChannelView& test_buffer_view = test_buffer[0];
for (size_t i = 0; i < kTestDataSize; ++i) {
test_buffer_view[i] = kTestData[i];
}
// Execute |ChannelView|s addition operator.
test_buffer_view += test_buffer_view;
for (size_t i = 0; i < test_buffer_view.size(); i++) {
EXPECT_EQ(kTestData[i] * 2.0f, test_buffer_view[i]);
}
}
// Tests subtraction-assignment operator.
TEST(ChannelView, SubtractionOperatorTest) {
// Here an AudioBuffer is used to ensure that the data is aligned.
AudioBuffer test_buffer(1, kTestDataSize);
ChannelView& test_buffer_view = test_buffer[0];
for (size_t i = 0; i < kTestDataSize; ++i) {
test_buffer_view[i] = kTestData[i];
}
// Execute |ChannelView|s subtraction operator.
test_buffer_view -= test_buffer_view;
for (size_t i = 0; i < test_buffer_view.size(); i++) {
EXPECT_EQ(0.0f, test_buffer_view[i]);
}
}
// Tests Clear method.
TEST(ChannelView, ClearTest) {
AudioBuffer test_buffer(1, kTestDataSize);
ChannelView& test_buffer_view = test_buffer[0];
for (size_t i = 0; i < kTestDataSize; ++i) {
test_buffer_view[i] = kTestData[i];
}
test_buffer_view.Clear();
for (const float& sample : test_buffer_view) {
EXPECT_EQ(0.0f, sample);
}
}
} // namespace
} // namespace vraudio