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/*
* Copyright (c) 2018 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_processing/agc2/limiter_db_gain_curve.h"
#include "rtc_base/gunit.h"
namespace webrtc {
TEST(FixedDigitalGainController2Limiter, ConstructDestruct) {
LimiterDbGainCurve l;
}
TEST(FixedDigitalGainController2Limiter, GainCurveShouldBeMonotone) {
LimiterDbGainCurve l;
float last_output_level = 0.f;
bool has_last_output_level = false;
for (float level = -90.f; level <= l.max_input_level_db(); level += 0.5f) {
const float current_output_level = l.GetOutputLevelDbfs(level);
if (!has_last_output_level) {
last_output_level = current_output_level;
has_last_output_level = true;
}
EXPECT_LE(last_output_level, current_output_level);
last_output_level = current_output_level;
}
}
TEST(FixedDigitalGainController2Limiter, GainCurveShouldBeContinuous) {
LimiterDbGainCurve l;
float last_output_level = 0.f;
bool has_last_output_level = false;
constexpr float kMaxDelta = 0.5f;
for (float level = -90.f; level <= l.max_input_level_db(); level += 0.5f) {
const float current_output_level = l.GetOutputLevelDbfs(level);
if (!has_last_output_level) {
last_output_level = current_output_level;
has_last_output_level = true;
}
EXPECT_LE(current_output_level, last_output_level + kMaxDelta);
last_output_level = current_output_level;
}
}
TEST(FixedDigitalGainController2Limiter, OutputGainShouldBeLessThanFullScale) {
LimiterDbGainCurve l;
for (float level = -90.f; level <= l.max_input_level_db(); level += 0.5f) {
const float current_output_level = l.GetOutputLevelDbfs(level);
EXPECT_LE(current_output_level, 0.f);
}
}
} // namespace webrtc