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/*
* Copyright (c) 2016 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 "modules/audio_mixer/audio_frame_manipulator.h"
#include <algorithm>
#include "test/gtest.h"
namespace webrtc {
namespace {
void FillFrameWithConstants(size_t samples_per_channel,
size_t number_of_channels,
int16_t value,
AudioFrame* frame) {
frame->num_channels_ = number_of_channels;
frame->samples_per_channel_ = samples_per_channel;
int16_t* frame_data = frame->mutable_data();
std::fill(frame_data, frame_data + samples_per_channel * number_of_channels,
value);
}
} // namespace
TEST(AudioFrameManipulator, CompareForwardRampWithExpectedResultStereo) {
constexpr int kSamplesPerChannel = 5;
constexpr int kNumberOfChannels = 2;
// Create a frame with values 5, 5, 5, ... and channels & samples as above.
AudioFrame frame;
FillFrameWithConstants(kSamplesPerChannel, kNumberOfChannels, 5, &frame);
Ramp(0.0f, 1.0f, &frame);
const int total_samples = kSamplesPerChannel * kNumberOfChannels;
const int16_t expected_result[total_samples] = {0, 0, 1, 1, 2, 2, 3, 3, 4, 4};
const int16_t* frame_data = frame.data();
EXPECT_TRUE(
std::equal(frame_data, frame_data + total_samples, expected_result));
}
TEST(AudioFrameManipulator, CompareBackwardRampWithExpectedResultMono) {
constexpr int kSamplesPerChannel = 5;
constexpr int kNumberOfChannels = 1;
// Create a frame with values 5, 5, 5, ... and channels & samples as above.
AudioFrame frame;
FillFrameWithConstants(kSamplesPerChannel, kNumberOfChannels, 5, &frame);
Ramp(1.0f, 0.0f, &frame);
const int total_samples = kSamplesPerChannel * kNumberOfChannels;
const int16_t expected_result[total_samples] = {5, 4, 3, 2, 1};
const int16_t* frame_data = frame.data();
EXPECT_TRUE(
std::equal(frame_data, frame_data + total_samples, expected_result));
}
} // namespace webrtc