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/*
* Copyright (c) 2017 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 <algorithm>
#include "api/array_view.h"
#include "modules/audio_processing/audio_buffer.h"
#include "modules/audio_processing/gain_controller2.h"
#include "rtc_base/checks.h"
#include "test/gtest.h"
namespace webrtc {
namespace test {
namespace {
constexpr size_t kFrameSizeMs = 10u;
constexpr size_t kStereo = 2u;
void SetAudioBufferSamples(float value, AudioBuffer* ab) {
// Sets all the samples in |ab| to |value|.
for (size_t k = 0; k < ab->num_channels(); ++k) {
std::fill(ab->channels_f()[k], ab->channels_f()[k] + ab->num_frames(),
value);
}
}
} // namespace
TEST(GainController2, CreateApplyConfig) {
// Instances GainController2 and applies different configurations.
std::unique_ptr<GainController2> gain_controller2(new GainController2());
// Check that the default config is valid.
AudioProcessing::Config::GainController2 config;
EXPECT_TRUE(GainController2::Validate(config));
gain_controller2->ApplyConfig(config);
// Check that attenuation is not allowed.
config.fixed_gain_db = -5.f;
EXPECT_FALSE(GainController2::Validate(config));
// Check that valid configurations are applied.
for (const float& fixed_gain_db : {0.f, 5.f, 10.f, 50.f}) {
config.fixed_gain_db = fixed_gain_db;
EXPECT_TRUE(GainController2::Validate(config));
gain_controller2->ApplyConfig(config);
}
}
TEST(GainController2, ToString) {
// Tests GainController2::ToString().
AudioProcessing::Config::GainController2 config;
config.fixed_gain_db = 5.f;
config.enabled = false;
EXPECT_EQ("{enabled: false, fixed_gain_dB: 5}",
GainController2::ToString(config));
config.enabled = true;
EXPECT_EQ("{enabled: true, fixed_gain_dB: 5}",
GainController2::ToString(config));
}
TEST(GainController2, Usage) {
// Tests GainController2::Process() on an AudioBuffer instance.
std::unique_ptr<GainController2> gain_controller2(new GainController2());
gain_controller2->Initialize(AudioProcessing::kSampleRate48kHz);
const size_t num_frames = rtc::CheckedDivExact<size_t>(
kFrameSizeMs * AudioProcessing::kSampleRate48kHz, 1000);
AudioBuffer ab(num_frames, kStereo, num_frames, kStereo, num_frames);
constexpr float sample_value = 1000.f;
SetAudioBufferSamples(sample_value, &ab);
AudioProcessing::Config::GainController2 config;
// Check that samples are amplified when the fixed gain is greater than 0 dB.
config.fixed_gain_db = 5.f;
gain_controller2->ApplyConfig(config);
gain_controller2->Process(&ab);
EXPECT_LT(sample_value, ab.channels_f()[0][0]);
}
} // namespace test
} // namespace webrtc
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