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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/modules/audio_coding/neteq/audio_multi_vector.h"
#include <assert.h>
#include <stdlib.h>
#include <string>
#include "testing/gtest/include/gtest/gtest.h"
#include "webrtc/typedefs.h"
namespace webrtc {
// This is a value-parameterized test. The test cases are instantiated with
// different values for the test parameter, which is used to determine the
// number of channels in the AudioMultiBuffer. Note that it is not possible
// to combine typed testing with value-parameterized testing, and since the
// tests for AudioVector already covers a number of different type parameters,
// this test focuses on testing different number of channels, and keeping the
// value type constant.
class AudioMultiVectorTest : public ::testing::TestWithParam<size_t> {
protected:
AudioMultiVectorTest()
: num_channels_(GetParam()), // Get the test parameter.
interleaved_length_(num_channels_ * array_length()) {
array_interleaved_ = new int16_t[num_channels_ * array_length()];
}
~AudioMultiVectorTest() {
delete [] array_interleaved_;
}
virtual void SetUp() {
// Populate test arrays.
for (size_t i = 0; i < array_length(); ++i) {
array_[i] = static_cast<int16_t>(i);
}
int16_t* ptr = array_interleaved_;
// Write 100, 101, 102, ... for first channel.
// Write 200, 201, 202, ... for second channel.
// And so on.
for (size_t i = 0; i < array_length(); ++i) {
for (size_t j = 1; j <= num_channels_; ++j) {
*ptr = j * 100 + i;
++ptr;
}
}
}
size_t array_length() const {
return sizeof(array_) / sizeof(array_[0]);
}
const size_t num_channels_;
size_t interleaved_length_;
int16_t array_[10];
int16_t* array_interleaved_;
};
// Create and destroy AudioMultiVector objects, both empty and with a predefined
// length.
TEST_P(AudioMultiVectorTest, CreateAndDestroy) {
AudioMultiVector vec1(num_channels_);
EXPECT_TRUE(vec1.Empty());
EXPECT_EQ(num_channels_, vec1.Channels());
EXPECT_EQ(0u, vec1.Size());
size_t initial_size = 17;
AudioMultiVector vec2(num_channels_, initial_size);
EXPECT_FALSE(vec2.Empty());
EXPECT_EQ(num_channels_, vec2.Channels());
EXPECT_EQ(initial_size, vec2.Size());
}
// Test the subscript operator [] for getting and setting.
TEST_P(AudioMultiVectorTest, SubscriptOperator) {
AudioMultiVector vec(num_channels_, array_length());
for (size_t channel = 0; channel < num_channels_; ++channel) {
for (size_t i = 0; i < array_length(); ++i) {
vec[channel][i] = static_cast<int16_t>(i);
// Make sure to use the const version.
const AudioVector& audio_vec = vec[channel];
EXPECT_EQ(static_cast<int16_t>(i), audio_vec[i]);
}
}
}
// Test the PushBackInterleaved method and the CopyFrom method. The Clear
// method is also invoked.
TEST_P(AudioMultiVectorTest, PushBackInterleavedAndCopy) {
AudioMultiVector vec(num_channels_);
vec.PushBackInterleaved(array_interleaved_, interleaved_length_);
AudioMultiVector vec_copy(num_channels_);
vec.CopyTo(&vec_copy); // Copy from |vec| to |vec_copy|.
ASSERT_EQ(num_channels_, vec.Channels());
ASSERT_EQ(array_length(), vec.Size());
ASSERT_EQ(num_channels_, vec_copy.Channels());
ASSERT_EQ(array_length(), vec_copy.Size());
for (size_t channel = 0; channel < vec.Channels(); ++channel) {
for (size_t i = 0; i < array_length(); ++i) {
EXPECT_EQ(static_cast<int16_t>((channel + 1) * 100 + i), vec[channel][i]);
EXPECT_EQ(vec[channel][i], vec_copy[channel][i]);
}
}
// Clear |vec| and verify that it is empty.
vec.Clear();
EXPECT_TRUE(vec.Empty());
// Now copy the empty vector and verify that the copy becomes empty too.
vec.CopyTo(&vec_copy);
EXPECT_TRUE(vec_copy.Empty());
}
// Try to copy to a NULL pointer. Nothing should happen.
TEST_P(AudioMultiVectorTest, CopyToNull) {
AudioMultiVector vec(num_channels_);
AudioMultiVector* vec_copy = NULL;
vec.PushBackInterleaved(array_interleaved_, interleaved_length_);
vec.CopyTo(vec_copy);
}
// Test the PushBack method with another AudioMultiVector as input argument.
TEST_P(AudioMultiVectorTest, PushBackVector) {
AudioMultiVector vec1(num_channels_, array_length());
AudioMultiVector vec2(num_channels_, array_length());
// Set the first vector to [0, 1, ..., array_length() - 1] +
// 100 * channel_number.
// Set the second vector to [array_length(), array_length() + 1, ...,
// 2 * array_length() - 1] + 100 * channel_number.
for (size_t channel = 0; channel < num_channels_; ++channel) {
for (size_t i = 0; i < array_length(); ++i) {
vec1[channel][i] = static_cast<int16_t>(i + 100 * channel);
vec2[channel][i] =
static_cast<int16_t>(i + 100 * channel + array_length());
}
}
// Append vec2 to the back of vec1.
vec1.PushBack(vec2);
ASSERT_EQ(2u * array_length(), vec1.Size());
for (size_t channel = 0; channel < num_channels_; ++channel) {
for (size_t i = 0; i < 2 * array_length(); ++i) {
EXPECT_EQ(static_cast<int16_t>(i + 100 * channel), vec1[channel][i]);
}
}
}
// Test the PushBackFromIndex method.
TEST_P(AudioMultiVectorTest, PushBackFromIndex) {
AudioMultiVector vec1(num_channels_);
vec1.PushBackInterleaved(array_interleaved_, interleaved_length_);
AudioMultiVector vec2(num_channels_);
// Append vec1 to the back of vec2 (which is empty). Read vec1 from the second
// last element.
vec2.PushBackFromIndex(vec1, array_length() - 2);
ASSERT_EQ(2u, vec2.Size());
for (size_t channel = 0; channel < num_channels_; ++channel) {
for (size_t i = 0; i < 2; ++i) {
EXPECT_EQ(array_interleaved_[channel + num_channels_ *
(array_length() - 2 + i)], vec2[channel][i]);
}
}
}
// Starts with pushing some values to the vector, then test the Zeros method.
TEST_P(AudioMultiVectorTest, Zeros) {
AudioMultiVector vec(num_channels_);
vec.PushBackInterleaved(array_interleaved_, interleaved_length_);
vec.Zeros(2 * array_length());
ASSERT_EQ(num_channels_, vec.Channels());
ASSERT_EQ(2u * array_length(), vec.Size());
for (size_t channel = 0; channel < num_channels_; ++channel) {
for (size_t i = 0; i < 2 * array_length(); ++i) {
EXPECT_EQ(0, vec[channel][i]);
}
}
}
// Test the ReadInterleaved method
TEST_P(AudioMultiVectorTest, ReadInterleaved) {
AudioMultiVector vec(num_channels_);
vec.PushBackInterleaved(array_interleaved_, interleaved_length_);
int16_t* output = new int16_t[interleaved_length_];
// Read 5 samples.
size_t read_samples = 5;
EXPECT_EQ(num_channels_ * read_samples,
vec.ReadInterleaved(read_samples, output));
EXPECT_EQ(0,
memcmp(array_interleaved_, output, read_samples * sizeof(int16_t)));
// Read too many samples. Expect to get all samples from the vector.
EXPECT_EQ(interleaved_length_,
vec.ReadInterleaved(array_length() + 1, output));
EXPECT_EQ(0,
memcmp(array_interleaved_, output, read_samples * sizeof(int16_t)));
delete [] output;
}
// Test the PopFront method.
TEST_P(AudioMultiVectorTest, PopFront) {
AudioMultiVector vec(num_channels_);
vec.PushBackInterleaved(array_interleaved_, interleaved_length_);
vec.PopFront(1); // Remove one element from each channel.
ASSERT_EQ(array_length() - 1u, vec.Size());
// Let |ptr| point to the second element of the first channel in the
// interleaved array.
int16_t* ptr = &array_interleaved_[num_channels_];
for (size_t i = 0; i < array_length() - 1; ++i) {
for (size_t channel = 0; channel < num_channels_; ++channel) {
EXPECT_EQ(*ptr, vec[channel][i]);
++ptr;
}
}
vec.PopFront(array_length()); // Remove more elements than vector size.
EXPECT_EQ(0u, vec.Size());
}
// Test the PopBack method.
TEST_P(AudioMultiVectorTest, PopBack) {
AudioMultiVector vec(num_channels_);
vec.PushBackInterleaved(array_interleaved_, interleaved_length_);
vec.PopBack(1); // Remove one element from each channel.
ASSERT_EQ(array_length() - 1u, vec.Size());
// Let |ptr| point to the first element of the first channel in the
// interleaved array.
int16_t* ptr = array_interleaved_;
for (size_t i = 0; i < array_length() - 1; ++i) {
for (size_t channel = 0; channel < num_channels_; ++channel) {
EXPECT_EQ(*ptr, vec[channel][i]);
++ptr;
}
}
vec.PopBack(array_length()); // Remove more elements than vector size.
EXPECT_EQ(0u, vec.Size());
}
// Test the AssertSize method.
TEST_P(AudioMultiVectorTest, AssertSize) {
AudioMultiVector vec(num_channels_, array_length());
EXPECT_EQ(array_length(), vec.Size());
// Start with asserting with smaller sizes than already allocated.
vec.AssertSize(0);
vec.AssertSize(array_length() - 1);
// Nothing should have changed.
EXPECT_EQ(array_length(), vec.Size());
// Assert with one element longer than already allocated.
vec.AssertSize(array_length() + 1);
// Expect vector to have grown.
EXPECT_EQ(array_length() + 1, vec.Size());
// Also check the individual AudioVectors.
for (size_t channel = 0; channel < vec.Channels(); ++channel) {
EXPECT_EQ(array_length() + 1u, vec[channel].Size());
}
}
// Test the PushBack method with another AudioMultiVector as input argument.
TEST_P(AudioMultiVectorTest, OverwriteAt) {
AudioMultiVector vec1(num_channels_);
vec1.PushBackInterleaved(array_interleaved_, interleaved_length_);
AudioMultiVector vec2(num_channels_);
vec2.Zeros(3); // 3 zeros in each channel.
// Overwrite vec2 at position 5.
vec1.OverwriteAt(vec2, 3, 5);
// Verify result.
// Length remains the same.
ASSERT_EQ(array_length(), vec1.Size());
int16_t* ptr = array_interleaved_;
for (size_t i = 0; i < array_length() - 1; ++i) {
for (size_t channel = 0; channel < num_channels_; ++channel) {
if (i >= 5 && i <= 7) {
// Elements 5, 6, 7 should have been replaced with zeros.
EXPECT_EQ(0, vec1[channel][i]);
} else {
EXPECT_EQ(*ptr, vec1[channel][i]);
}
++ptr;
}
}
}
// Test the CopyChannel method, when the test is instantiated with at least two
// channels.
TEST_P(AudioMultiVectorTest, CopyChannel) {
if (num_channels_ < 2)
return;
AudioMultiVector vec(num_channels_);
vec.PushBackInterleaved(array_interleaved_, interleaved_length_);
// Create a reference copy.
AudioMultiVector ref(num_channels_);
ref.PushBack(vec);
// Copy from first to last channel.
vec.CopyChannel(0, num_channels_ - 1);
// Verify that the first and last channels are identical; the others should
// be left untouched.
for (size_t i = 0; i < array_length(); ++i) {
// Verify that all but the last channel are untouched.
for (size_t channel = 0; channel < num_channels_ - 1; ++channel) {
EXPECT_EQ(ref[channel][i], vec[channel][i]);
}
// Verify that the last and the first channels are identical.
EXPECT_EQ(vec[0][i], vec[num_channels_ - 1][i]);
}
}
INSTANTIATE_TEST_CASE_P(TestNumChannels,
AudioMultiVectorTest,
::testing::Values(static_cast<size_t>(1),
static_cast<size_t>(2),
static_cast<size_t>(5)));
} // namespace webrtc