CSD: rename get/setOutputRs2 to include upper bound

RS2 represents an interval of power levels. This is why it is clearer to
specify upper bound in the naming to make it clear that we refer to the
upper limit which when exceeded will trigger a momentary exposure.

Test: atest VtsHalAudioCoreTargetTest
Bug: 273961110
Change-Id: If4e065deeedb32c3e5e81caf4cd6924fb5815dc0
diff --git a/audio/aidl/aidl_api/android.hardware.audio.core.sounddose/current/android/hardware/audio/core/sounddose/ISoundDose.aidl b/audio/aidl/aidl_api/android.hardware.audio.core.sounddose/current/android/hardware/audio/core/sounddose/ISoundDose.aidl
index 3b5d2d0..5800091 100644
--- a/audio/aidl/aidl_api/android.hardware.audio.core.sounddose/current/android/hardware/audio/core/sounddose/ISoundDose.aidl
+++ b/audio/aidl/aidl_api/android.hardware.audio.core.sounddose/current/android/hardware/audio/core/sounddose/ISoundDose.aidl
@@ -34,8 +34,8 @@
 package android.hardware.audio.core.sounddose;
 @VintfStability
 interface ISoundDose {
-  void setOutputRs2(float rs2ValueDbA);
-  float getOutputRs2();
+  void setOutputRs2UpperBound(float rs2ValueDbA);
+  float getOutputRs2UpperBound();
   void registerSoundDoseCallback(in android.hardware.audio.core.sounddose.ISoundDose.IHalSoundDoseCallback callback);
   const int DEFAULT_MAX_RS2 = 100;
   const int MIN_RS2 = 80;
diff --git a/audio/aidl/android/hardware/audio/core/sounddose/ISoundDose.aidl b/audio/aidl/android/hardware/audio/core/sounddose/ISoundDose.aidl
index 953ab62..b442ac5 100644
--- a/audio/aidl/android/hardware/audio/core/sounddose/ISoundDose.aidl
+++ b/audio/aidl/android/hardware/audio/core/sounddose/ISoundDose.aidl
@@ -35,21 +35,21 @@
     const int MIN_RS2 = 80;
 
     /**
-     * Sets the RS2 value used for momentary exposure warnings. Default value is
+     * Sets the RS2 upper bound used for momentary exposure warnings. Default value is
      * DEFAULT_MAX_RS2 as specified in IEC62368-1 3rd edition.
      *
-     * @param rs2ValueDbA custom RS2 value to use. Must not be higher than DEFAULT_MAX_RS2
+     * @param rs2ValueDbA custom RS2 upper bound to use
      * @throws EX_ILLEGAL_ARGUMENT if rs2ValueDbA is greater than DEFAULT_MAX_RS2 or lower
-     *                             than 80dBA
+     *                             than MIN_RS2
      */
-    void setOutputRs2(float rs2ValueDbA);
+    void setOutputRs2UpperBound(float rs2ValueDbA);
 
     /**
-     * Gets the RS2 value used for momentary exposure warnings.
+     * Gets the RS2 upper bound used for momentary exposure warnings.
      *
-     * @return the RS2 value in dBA
+     * @return the RS2 upper bound in dBA
      */
-    float getOutputRs2();
+    float getOutputRs2UpperBound();
 
     /**
      * Registers the HAL callback for sound dose computation. If sound dose is supported
@@ -68,9 +68,9 @@
     @VintfStability
     oneway interface IHalSoundDoseCallback {
         /**
-         * Called whenever the current MEL value exceeds the set RS2 value.
+         * Called whenever the current MEL value exceeds the set RS2 upper bound.
          *
-         * @param currentDbA the current MEL value which exceeds the RS2 value
+         * @param currentDbA the current MEL value which exceeds the RS2 upper bound
          * @param audioDevice the audio device where the MEL exposure warning was recorded
          */
         void onMomentaryExposureWarning(float currentDbA, in AudioDevice audioDevice);
@@ -78,14 +78,15 @@
         @VintfStability
         parcelable MelRecord {
             /**
-             * Array of continuously recorded MEL values >= RS1 (1 per second).
+             * Array of continuously recorded MEL values >= MIN_RS2 (1 per second).
              * First value in the array was recorded at 'timestamp'.
              */
             float[] melValues;
             /**
-             * Corresponds to the time in seconds when the first MEL entry in melValues
-             * was recorded. The timestamp values have to be consistent throughout all
-             * audio ports, equal timestamp values will be aggregated.
+             * Corresponds to the time in seconds, as reported by CLOCK_MONOTONIC, when
+             * the first MEL entry in melValues was recorded. The timestamp values have
+             * to be consistent throughout all audio ports, equal timestamp values will
+             * be aggregated.
              */
             long timestamp;
         }
diff --git a/audio/aidl/default/SoundDose.cpp b/audio/aidl/default/SoundDose.cpp
index be9f93a..f12ce5d 100644
--- a/audio/aidl/default/SoundDose.cpp
+++ b/audio/aidl/default/SoundDose.cpp
@@ -22,7 +22,7 @@
 
 namespace aidl::android::hardware::audio::core::sounddose {
 
-ndk::ScopedAStatus SoundDose::setOutputRs2(float in_rs2ValueDbA) {
+ndk::ScopedAStatus SoundDose::setOutputRs2UpperBound(float in_rs2ValueDbA) {
     if (in_rs2ValueDbA < MIN_RS2 || in_rs2ValueDbA > DEFAULT_MAX_RS2) {
         LOG(ERROR) << __func__ << ": RS2 value is invalid: " << in_rs2ValueDbA;
         return ndk::ScopedAStatus::fromExceptionCode(EX_ILLEGAL_ARGUMENT);
@@ -32,7 +32,7 @@
     return ndk::ScopedAStatus::ok();
 }
 
-ndk::ScopedAStatus SoundDose::getOutputRs2(float* _aidl_return) {
+ndk::ScopedAStatus SoundDose::getOutputRs2UpperBound(float* _aidl_return) {
     *_aidl_return = mRs2Value;
     LOG(DEBUG) << __func__ << ": returning " << *_aidl_return;
     return ndk::ScopedAStatus::ok();
diff --git a/audio/aidl/default/include/core-impl/SoundDose.h b/audio/aidl/default/include/core-impl/SoundDose.h
index 306aa04..2a069d9 100644
--- a/audio/aidl/default/include/core-impl/SoundDose.h
+++ b/audio/aidl/default/include/core-impl/SoundDose.h
@@ -29,8 +29,8 @@
   public:
     SoundDose() : mRs2Value(DEFAULT_MAX_RS2){};
 
-    ndk::ScopedAStatus setOutputRs2(float in_rs2ValueDbA) override;
-    ndk::ScopedAStatus getOutputRs2(float* _aidl_return) override;
+    ndk::ScopedAStatus setOutputRs2UpperBound(float in_rs2ValueDbA) override;
+    ndk::ScopedAStatus getOutputRs2UpperBound(float* _aidl_return) override;
     ndk::ScopedAStatus registerSoundDoseCallback(
             const std::shared_ptr<ISoundDose::IHalSoundDoseCallback>& in_callback) override;
 
diff --git a/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp b/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp
index 5d522a3..e790d4f 100644
--- a/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp
+++ b/audio/aidl/vts/VtsHalAudioCoreModuleTargetTest.cpp
@@ -3543,26 +3543,27 @@
             << "getSoundDose must return the same interface instance across invocations";
 }
 
-TEST_P(AudioCoreSoundDose, GetSetOutputRs2) {
+TEST_P(AudioCoreSoundDose, GetSetOutputRs2UpperBound) {
     if (soundDose == nullptr) {
         GTEST_SKIP() << "SoundDose is not supported";
     }
 
     bool isSupported = false;
-    EXPECT_NO_FATAL_FAILURE(TestAccessors<float>(soundDose.get(), &ISoundDose::getOutputRs2,
-                                                 &ISoundDose::setOutputRs2,
+    EXPECT_NO_FATAL_FAILURE(TestAccessors<float>(soundDose.get(),
+                                                 &ISoundDose::getOutputRs2UpperBound,
+                                                 &ISoundDose::setOutputRs2UpperBound,
                                                  /*validValues=*/{80.f, 90.f, 100.f},
                                                  /*invalidValues=*/{79.f, 101.f}, &isSupported));
-    EXPECT_TRUE(isSupported) << "Getting/Setting RS2 must be supported";
+    EXPECT_TRUE(isSupported) << "Getting/Setting RS2 upper bound must be supported";
 }
 
-TEST_P(AudioCoreSoundDose, CheckDefaultRs2Value) {
+TEST_P(AudioCoreSoundDose, CheckDefaultRs2UpperBound) {
     if (soundDose == nullptr) {
         GTEST_SKIP() << "SoundDose is not supported";
     }
 
     float rs2Value;
-    ASSERT_IS_OK(soundDose->getOutputRs2(&rs2Value));
+    ASSERT_IS_OK(soundDose->getOutputRs2UpperBound(&rs2Value));
     EXPECT_EQ(rs2Value, ISoundDose::DEFAULT_MAX_RS2);
 }