Reland of added functionality for specifying the initial signal level to use for the gain estimation

webrtc/modules/audio_processing/level_controller/level_controller_unittest.cc

 /*
  *  Copyright (c) 2016 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 <vector>
 
 #include "webrtc/base/array_view.h"
+#include "webrtc/base/optional.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/include/audio_processing.h"
 #include "webrtc/modules/audio_processing/level_controller/level_controller.h"
 #include "webrtc/modules/audio_processing/test/audio_buffer_tools.h"
 #include "webrtc/modules/audio_processing/test/bitexactness_tools.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
 namespace {
 
 const int kNumFramesToProcess = 1000;
 
 // Processes a specified amount of frames, verifies the results and reports
 // any errors.
 void RunBitexactnessTest(int sample_rate_hz,
                          size_t num_channels,
+                         rtc::Optional<float> initial_peak_level_dbfs,
                          rtc::ArrayView<const float> output_reference) {
   LevelController level_controller;
   level_controller.Initialize(sample_rate_hz);
+  if (initial_peak_level_dbfs) {
+    AudioProcessing::Config::LevelController config;
+    config.initial_peak_level_dbfs = *initial_peak_level_dbfs;
+    level_controller.ApplyConfig(config);
+  }
 
   int samples_per_channel = rtc::CheckedDivExact(sample_rate_hz, 100);
   const StreamConfig capture_config(sample_rate_hz, num_channels, false);
   AudioBuffer capture_buffer(
       capture_config.num_frames(), capture_config.num_channels(),
       capture_config.num_frames(), capture_config.num_channels(),
       capture_config.num_frames());
   test::InputAudioFile capture_file(
       test::GetApmCaptureTestVectorFileName(sample_rate_hz));
   std::vector<float> capture_input(samples_per_channel * num_channels);
@@ skipping 18 matching lines @@
   // memory, testing only the last frame implicitly also tests the preceeding
   // frames.
   const float kVectorElementErrorBound = 1.0f / 32768.0f;
   EXPECT_TRUE(test::VerifyDeinterleavedArray(
       capture_config.num_frames(), capture_config.num_channels(),
       output_reference, capture_output, kVectorElementErrorBound));
 }
 
 }  // namespace
 
-TEST(LevelControlConfigTest, ToStringEnabled) {
+TEST(LevelControllerConfig, ToString) {
   AudioProcessing::Config config;
   config.level_controller.enabled = true;
-  EXPECT_EQ("{enabled: true}",
+  config.level_controller.initial_peak_level_dbfs = -6.0206f;
+  EXPECT_EQ("{enabled: true, initial_peak_level_dbfs: -6.0206}",
             LevelController::ToString(config.level_controller));
-}
 
-TEST(LevelControlConfigTest, ToStringNotEnabled) {
-  AudioProcessing::Config config;
   config.level_controller.enabled = false;
-  EXPECT_EQ("{enabled: false}",
+  config.level_controller.initial_peak_level_dbfs = -50.f;
+  EXPECT_EQ("{enabled: false, initial_peak_level_dbfs: -50}",
             LevelController::ToString(config.level_controller));
 }
 
-TEST(LevelControlConfigTest, DefaultValue) {
-  AudioProcessing::Config config;
-  EXPECT_FALSE(config.level_controller.enabled);
-}
-
 TEST(LevelControlBitExactnessTest, DISABLED_Mono8kHz) {
   const float kOutputReference[] = {-0.013939f, -0.012154f, -0.009054f};
   RunBitexactnessTest(AudioProcessing::kSampleRate8kHz, 1,
-                      kOutputReference);
+                      rtc::Optional<float>(), kOutputReference);
 }
 
 TEST(LevelControlBitExactnessTest, DISABLED_Mono16kHz) {
   const float kOutputReference[] = {-0.013706f, -0.013215f, -0.013018f};
   RunBitexactnessTest(AudioProcessing::kSampleRate16kHz, 1,
-                      kOutputReference);
+                      rtc::Optional<float>(), kOutputReference);
 }
 
 TEST(LevelControlBitExactnessTest, DISABLED_Mono32kHz) {
   const float kOutputReference[] = {-0.014495f, -0.016425f, -0.016085f};
   RunBitexactnessTest(AudioProcessing::kSampleRate32kHz, 1,
-                      kOutputReference);
+                      rtc::Optional<float>(), kOutputReference);
 }
 
 // TODO(peah): Investigate why this particular testcase differ between Android
 // and the rest of the platforms.
 TEST(LevelControlBitExactnessTest, DISABLED_Mono48kHz) {
 #if !(defined(WEBRTC_ARCH_ARM64) || defined(WEBRTC_ARCH_ARM) || \
       defined(WEBRTC_ANDROID))
   const float kOutputReference[] = {-0.014277f, -0.015180f, -0.017437f};
 #else
   const float kOutputReference[] = {-0.015949f, -0.016957f, -0.019478f};
 #endif
   RunBitexactnessTest(AudioProcessing::kSampleRate48kHz, 1,
-                      kOutputReference);
+                      rtc::Optional<float>(), kOutputReference);
 }
 
 TEST(LevelControlBitExactnessTest, DISABLED_Stereo8kHz) {
   const float kOutputReference[] = {-0.014063f, -0.008450f, -0.012159f,
                                     -0.051967f, -0.023202f, -0.047858f};
   RunBitexactnessTest(AudioProcessing::kSampleRate8kHz, 2,
-                      kOutputReference);
+                      rtc::Optional<float>(), kOutputReference);
 }
 
 TEST(LevelControlBitExactnessTest, DISABLED_Stereo16kHz) {
   const float kOutputReference[] = {-0.012714f, -0.005896f, -0.012220f,
                                     -0.053306f, -0.024549f, -0.051527f};
   RunBitexactnessTest(AudioProcessing::kSampleRate16kHz, 2,
-                      kOutputReference);
+                      rtc::Optional<float>(), kOutputReference);
 }
 
 TEST(LevelControlBitExactnessTest, DISABLED_Stereo32kHz) {
   const float kOutputReference[] = {-0.011737f, -0.007018f, -0.013446f,
                                     -0.053505f, -0.026292f, -0.056221f};
   RunBitexactnessTest(AudioProcessing::kSampleRate32kHz, 2,
-                      kOutputReference);
+                      rtc::Optional<float>(), kOutputReference);
 }
 
 TEST(LevelControlBitExactnessTest, DISABLED_Stereo48kHz) {
   const float kOutputReference[] = {-0.010643f, -0.006334f, -0.011377f,
                                     -0.049088f, -0.023600f, -0.050465f};
   RunBitexactnessTest(AudioProcessing::kSampleRate48kHz, 2,
-                      kOutputReference);
+                      rtc::Optional<float>(), kOutputReference);
 }
 
-
+TEST(LevelControlBitExactnessTest, DISABLED_MonoInitial48kHz) {
+  const float kOutputReference[] = {-0.013753f, -0.014623f, -0.016797f};
+  RunBitexactnessTest(AudioProcessing::kSampleRate48kHz, 1,
+                      rtc::Optional<float>(-50), kOutputReference);
+}
 
 }  // namespace webrtc