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/*
* Copyright (c) 2013 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 "testing/gtest/include/gtest/gtest.h"
#include "webrtc/common_audio/include/audio_util.h"
#include "webrtc/typedefs.h"
namespace webrtc {
void ExpectArraysEq(const int16_t* ref, const int16_t* test, int length) {
for (int i = 0; i < length; ++i) {
EXPECT_EQ(test[i], ref[i]);
}
}
TEST(AudioUtilTest, Clamp) {
EXPECT_EQ(1000.f, ClampInt16(1000.f));
EXPECT_EQ(32767.f, ClampInt16(32767.5f));
EXPECT_EQ(-32768.f, ClampInt16(-32768.5f));
}
TEST(AudioUtilTest, Round) {
EXPECT_EQ(0, RoundToInt16(0.f));
EXPECT_EQ(0, RoundToInt16(0.4f));
EXPECT_EQ(1, RoundToInt16(0.5f));
EXPECT_EQ(0, RoundToInt16(-0.4f));
EXPECT_EQ(-1, RoundToInt16(-0.5f));
}
TEST(AudioUtilTest, InterleavingStereo) {
const int16_t kInterleaved[] = {2, 3, 4, 9, 8, 27, 16, 81};
const int kSamplesPerChannel = 4;
const int kNumChannels = 2;
const int kLength = kSamplesPerChannel * kNumChannels;
int16_t left[kSamplesPerChannel], right[kSamplesPerChannel];
int16_t* deinterleaved[] = {left, right};
Deinterleave(kInterleaved, kSamplesPerChannel, kNumChannels, deinterleaved);
const int16_t kRefLeft[] = {2, 4, 8, 16};
const int16_t kRefRight[] = {3, 9, 27, 81};
ExpectArraysEq(left, kRefLeft, kSamplesPerChannel);
ExpectArraysEq(right, kRefRight, kSamplesPerChannel);
int16_t interleaved[kLength];
Interleave(deinterleaved, kSamplesPerChannel, kNumChannels, interleaved);
ExpectArraysEq(interleaved, kInterleaved, kLength);
}
TEST(AudioUtilTest, InterleavingMonoIsIdentical) {
const int16_t kInterleaved[] = {1, 2, 3, 4, 5};
const int kSamplesPerChannel = 5;
const int kNumChannels = 1;
int16_t mono[kSamplesPerChannel];
int16_t* deinterleaved[] = {mono};
Deinterleave(kInterleaved, kSamplesPerChannel, kNumChannels, deinterleaved);
ExpectArraysEq(mono, kInterleaved, kSamplesPerChannel);
int16_t interleaved[kSamplesPerChannel];
Interleave(deinterleaved, kSamplesPerChannel, kNumChannels, interleaved);
ExpectArraysEq(interleaved, mono, kSamplesPerChannel);
}
} // namespace webrtc
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