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087e9bed41
Limiter has been renamed to LimiterDbGainCurve, which is a more correct name and will allow in a follow-up CL to reuse the Limiter name for GainCurveApplier. This is done to allow to use the limiter without instancing the fixed digital gain controller and then to fix an AGC2 issue (namely, fixed gain applied after the adaptive one). Bug: webrtc:7494 Change-Id: Icd7050e3e51b832bfbf35e5cc61109215c5b1ca6 Reviewed-on: https://webrtc-review.googlesource.com/c/106901 Commit-Queue: Alessio Bazzica <alessiob@webrtc.org> Reviewed-by: Alex Loiko <aleloi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25322}
60 lines
2 KiB
C++
60 lines
2 KiB
C++
/*
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* Copyright (c) 2018 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 "modules/audio_processing/agc2/limiter_db_gain_curve.h"
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#include "rtc_base/gunit.h"
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namespace webrtc {
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TEST(FixedDigitalGainController2Limiter, ConstructDestruct) {
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LimiterDbGainCurve l;
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}
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TEST(FixedDigitalGainController2Limiter, GainCurveShouldBeMonotone) {
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LimiterDbGainCurve l;
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float last_output_level = 0.f;
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bool has_last_output_level = false;
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for (float level = -90.f; level <= l.max_input_level_db(); level += 0.5f) {
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const float current_output_level = l.GetOutputLevelDbfs(level);
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if (!has_last_output_level) {
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last_output_level = current_output_level;
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has_last_output_level = true;
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}
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EXPECT_LE(last_output_level, current_output_level);
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last_output_level = current_output_level;
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}
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}
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TEST(FixedDigitalGainController2Limiter, GainCurveShouldBeContinuous) {
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LimiterDbGainCurve l;
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float last_output_level = 0.f;
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bool has_last_output_level = false;
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constexpr float kMaxDelta = 0.5f;
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for (float level = -90.f; level <= l.max_input_level_db(); level += 0.5f) {
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const float current_output_level = l.GetOutputLevelDbfs(level);
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if (!has_last_output_level) {
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last_output_level = current_output_level;
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has_last_output_level = true;
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}
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EXPECT_LE(current_output_level, last_output_level + kMaxDelta);
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last_output_level = current_output_level;
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}
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}
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TEST(FixedDigitalGainController2Limiter, OutputGainShouldBeLessThanFullScale) {
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LimiterDbGainCurve l;
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for (float level = -90.f; level <= l.max_input_level_db(); level += 0.5f) {
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const float current_output_level = l.GetOutputLevelDbfs(level);
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EXPECT_LE(current_output_level, 0.f);
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}
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}
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} // namespace webrtc
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