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

webrtc/modules/audio_processing/audio_processing_unittest.cc

Index: webrtc/modules/audio_processing/audio_processing_unittest.cc
diff --git a/webrtc/modules/audio_processing/audio_processing_unittest.cc b/webrtc/modules/audio_processing/audio_processing_unittest.cc
index 646e8b7b874eb1c0baba34c12cb926503d3a5d1a..f0770d990a8efafc3d7c3290f050678dbd715f79 100644
--- a/webrtc/modules/audio_processing/audio_processing_unittest.cc
+++ b/webrtc/modules/audio_processing/audio_processing_unittest.cc
@@ -22,6 +22,7 @@
 #include "webrtc/common_audio/resampler/include/push_resampler.h"
 #include "webrtc/common_audio/resampler/push_sinc_resampler.h"
 #include "webrtc/common_audio/signal_processing/include/signal_processing_library.h"
+#include "webrtc/modules/audio_processing/audio_processing_impl.h"
 #include "webrtc/modules/audio_processing/beamformer/mock_nonlinear_beamformer.h"
 #include "webrtc/modules/audio_processing/common.h"
 #include "webrtc/modules/audio_processing/include/audio_processing.h"
@@ -2774,4 +2775,93 @@ INSTANTIATE_TEST_CASE_P(
 #endif
 
 }  // namespace
+
+TEST(ApmConfiguration, DefaultBehavior) {
+  // Verify that the level controller is default off, it can be activate using
+  // the config, and that the default initial level is maintained after the
+  // config has been appied.
+  const float kTolerance = 0.0001f;
+  std::unique_ptr<AudioProcessingImpl> apm(
+      new AudioProcessingImpl(webrtc::Config()));
+  AudioProcessing::Config config;
+  EXPECT_FALSE(apm->config_.level_controller.enabled);
+  // TODO(peah): Add test for the existence of the level controller object once
+  // that is created only when that is specified in the config.
+  // TODO(peah): Remove the testing for
+  // apm->capture_nonlocked_.level_controller_enabled once the value in config_
+  // is instead used to activate the level controller.
+  EXPECT_FALSE(apm->capture_nonlocked_.level_controller_enabled);
+  EXPECT_NEAR(-6.0206f, apm->config_.level_controller.initial_peak_level_dbfs,

[aleloi, 2016/09/19 15:06:06]

Maybe we should compare with the value in lc_constants.h instead? This comment
applies to all comparisons with the default value.

[peah-webrtc, 2016/09/19 16:37:10]

Good point!
Done.

+              kTolerance);
+  config.level_controller.enabled = true;
+  apm->ApplyConfig(config);
+  EXPECT_TRUE(apm->config_.level_controller.enabled);
+  // TODO(peah): Add test for the existence of the level controller object once
+  // that is created only when the that is specified in the config.

[aleloi, 2016/09/19 15:06:06]

'the that' - remove 'the'

[peah-webrtc, 2016/09/19 16:37:10]

Done.

+  // TODO(peah): Remove the testing for
+  // apm->capture_nonlocked_.level_controller_enabled once the value in config_
+  // is instead used to activate the level controller.
+  EXPECT_TRUE(apm->capture_nonlocked_.level_controller_enabled);
+  EXPECT_NEAR(-6.0206f, apm->config_.level_controller.initial_peak_level_dbfs,
+              kTolerance);
+}
+
+TEST(ApmConfiguration, ValidConfigBehavior) {
+  // Verify that the initial level can be specified and is retained after the
+  // config has been applied.
+  const float kTolerance = 0.0001f;
+  std::unique_ptr<AudioProcessingImpl> apm(
+      new AudioProcessingImpl(webrtc::Config()));
+  AudioProcessing::Config config;
+  config = AudioProcessing::Config();
+  config.level_controller.initial_peak_level_dbfs = -50.f;
+  apm->ApplyConfig(config);
+  EXPECT_FALSE(apm->config_.level_controller.enabled);
+  // TODO(peah): Add test for the existence of the level controller object once
+  // that is created only when the that is specified in the config.
+  // TODO(peah): Remove the testing for
+  // apm->capture_nonlocked_.level_controller_enabled once the value in config_
+  // is instead used to activate the level controller.
+  EXPECT_FALSE(apm->capture_nonlocked_.level_controller_enabled);
+  EXPECT_NEAR(-50.f, apm->config_.level_controller.initial_peak_level_dbfs,
+              kTolerance);
+}
+
+TEST(ApmConfiguration, NonValidConfigBehavior) {
+  // Verify that the config is properly reset when nonproper values are applied
+  // for the initial level.
+  const float kTolerance = 0.0001f;
+  std::unique_ptr<AudioProcessingImpl> apm(
+      new AudioProcessingImpl(webrtc::Config()));
+  AudioProcessing::Config config;
+  config = AudioProcessing::Config();
+  config.level_controller.enabled = true;
+  config.level_controller.initial_peak_level_dbfs = -101.f;
+  apm->ApplyConfig(config);
+  EXPECT_FALSE(apm->config_.level_controller.enabled);
+  // TODO(peah): Add test for the existence of the level controller object once
+  // that is created only when the that is specified in the config.
+  // TODO(peah): Remove the testing for
+  // apm->capture_nonlocked_.level_controller_enabled once the value in config_
+  // is instead used to activate the level controller.
+  EXPECT_FALSE(apm->capture_nonlocked_.level_controller_enabled);
+  EXPECT_NEAR(-6.0206f, apm->config_.level_controller.initial_peak_level_dbfs,
+              kTolerance);
+
+  apm.reset(new AudioProcessingImpl(webrtc::Config()));
+  config = AudioProcessing::Config();
+  config.level_controller.enabled = true;
+  config.level_controller.initial_peak_level_dbfs = 1.f;
+  apm->ApplyConfig(config);
+  EXPECT_FALSE(apm->config_.level_controller.enabled);
+  // TODO(peah): Add test for the existence of the level controller object once
+  // that is created only when the that is specified in the config.
+  // TODO(peah): Remove the testing for
+  // apm->capture_nonlocked_.level_controller_enabled once the value in config_
+  // is instead used to activate the level controller.
+  EXPECT_FALSE(apm->capture_nonlocked_.level_controller_enabled);
+  EXPECT_NEAR(-6.0206f, apm->config_.level_controller.initial_peak_level_dbfs,
+              kTolerance);
+}
+
 }  // namespace webrtc