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90 lines
3.0 KiB
C++
90 lines
3.0 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "webrtc/modules/audio_coding/neteq/dsp_helper.h"
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#include "gtest/gtest.h"
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#include "webrtc/modules/audio_coding/neteq/audio_multi_vector.h"
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#include "webrtc/typedefs.h"
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namespace webrtc {
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TEST(DspHelper, RampSignalArray) {
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static const int kLen = 100;
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int16_t input[kLen];
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int16_t output[kLen];
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// Fill input with 1000.
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for (int i = 0; i < kLen; ++i) {
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input[i] = 1000;
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}
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int start_factor = 0;
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// Ramp from 0 to 1 (in Q14) over the array. Note that |increment| is in Q20,
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// while the factor is in Q14, hence the shift by 6.
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int increment = (16384 << 6) / kLen;
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// Test first method.
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int stop_factor = DspHelper::RampSignal(input, kLen, start_factor, increment,
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output);
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EXPECT_EQ(16383, stop_factor); // Almost reach 1 in Q14.
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for (int i = 0; i < kLen; ++i) {
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EXPECT_EQ(1000 * i / kLen, output[i]);
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}
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// Test second method. (Note that this modifies |input|.)
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stop_factor = DspHelper::RampSignal(input, kLen, start_factor, increment);
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EXPECT_EQ(16383, stop_factor); // Almost reach 1 in Q14.
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for (int i = 0; i < kLen; ++i) {
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EXPECT_EQ(1000 * i / kLen, input[i]);
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}
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}
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TEST(DspHelper, RampSignalAudioMultiVector) {
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static const int kLen = 100;
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static const int kChannels = 5;
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AudioMultiVector input(kChannels, kLen * 3);
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// Fill input with 1000.
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for (int i = 0; i < kLen * 3; ++i) {
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for (int channel = 0; channel < kChannels; ++channel) {
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input[channel][i] = 1000;
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}
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}
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// We want to start ramping at |start_index| and keep ramping for |kLen|
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// samples.
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int start_index = kLen;
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int start_factor = 0;
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// Ramp from 0 to 1 (in Q14) in |kLen| samples. Note that |increment| is in
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// Q20, while the factor is in Q14, hence the shift by 6.
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int increment = (16384 << 6) / kLen;
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int stop_factor = DspHelper::RampSignal(&input, start_index, kLen,
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start_factor, increment);
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EXPECT_EQ(16383, stop_factor); // Almost reach 1 in Q14.
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// Verify that the first |kLen| samples are left untouched.
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int i;
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for (i = 0; i < kLen; ++i) {
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for (int channel = 0; channel < kChannels; ++channel) {
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EXPECT_EQ(1000, input[channel][i]);
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}
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}
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// Verify that the next block of |kLen| samples are ramped.
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for (; i < 2 * kLen; ++i) {
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for (int channel = 0; channel < kChannels; ++channel) {
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EXPECT_EQ(1000 * (i - kLen) / kLen, input[channel][i]);
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}
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}
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// Verify the last |kLen| samples are left untouched.
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for (; i < 3 * kLen; ++i) {
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for (int channel = 0; channel < kChannels; ++channel) {
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EXPECT_EQ(1000, input[channel][i]);
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}
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}
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}
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} // namespace webrtc
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