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a05ee82c4c
This CL adds the GainCurveApplier (GCA). It owns a FixedDigitalLevelEstimator (LE) and an InterpolatedGainCurve (IGC). The GCA uses the LE to compute the input signal level, looks up a gain from IGC and applies it on the signal. The other IGC and LE submodules were added in previous CLs [1] and [2]. This CL also turns on AGC2 in the APM fuzzer. [1] https://webrtc-review.googlesource.com/c/src/+/51920 [2] https://webrtc-review.googlesource.com/c/src/+/52381 Bug: webrtc:7949 Change-Id: Idb10cc3ca9d6d2e4ac5824cc3391ed8aa680f6cd Reviewed-on: https://webrtc-review.googlesource.com/54361 Commit-Queue: Alex Loiko <aleloi@webrtc.org> Reviewed-by: Sam Zackrisson <saza@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22103}
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.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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Limiter l;
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}
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TEST(FixedDigitalGainController2Limiter, GainCurveShouldBeMonotone) {
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Limiter 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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Limiter 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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Limiter 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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