Read vendor distortion output gain.
As the motor may be various on different devices, it makes sense to have
different distortion output gain for HapticGenerator effect so that the
generated data will not be harmful to motor.
Bug: 188025353
Test: manual
Change-Id: I74faef55005447f66410f173d8b41909a7ae87d2
diff --git a/media/libeffects/hapticgenerator/Android.bp b/media/libeffects/hapticgenerator/Android.bp
index a660957..03ce329 100644
--- a/media/libeffects/hapticgenerator/Android.bp
+++ b/media/libeffects/hapticgenerator/Android.bp
@@ -45,6 +45,7 @@
shared_libs: [
"libaudioutils",
+ "libbase",
"libbinder",
"liblog",
"libutils",
diff --git a/media/libeffects/hapticgenerator/EffectHapticGenerator.cpp b/media/libeffects/hapticgenerator/EffectHapticGenerator.cpp
index 65a20a7..7bd8c81 100644
--- a/media/libeffects/hapticgenerator/EffectHapticGenerator.cpp
+++ b/media/libeffects/hapticgenerator/EffectHapticGenerator.cpp
@@ -22,12 +22,15 @@
#include <algorithm>
#include <memory>
+#include <string>
#include <utility>
#include <errno.h>
#include <inttypes.h>
#include <math.h>
+#include <android-base/parsedouble.h>
+#include <android-base/properties.h>
#include <audio_effects/effect_hapticgenerator.h>
#include <audio_utils/format.h>
#include <system/audio.h>
@@ -35,6 +38,7 @@
static constexpr float DEFAULT_RESONANT_FREQUENCY = 150.0f;
static constexpr float DEFAULT_BSF_ZERO_Q = 8.0f;
static constexpr float DEFAULT_BSF_POLE_Q = 4.0f;
+static constexpr float DEFAULT_DISTORTION_OUTPUT_GAIN = 1.5f;
// This is the only symbol that needs to be exported
__attribute__ ((visibility ("default")))
@@ -81,6 +85,15 @@
namespace {
+float getFloatProperty(const std::string& key, float defaultValue) {
+ float result;
+ std::string value = android::base::GetProperty(key, "");
+ if (!value.empty() && android::base::ParseFloat(value, &result)) {
+ return result;
+ }
+ return defaultValue;
+}
+
int HapticGenerator_Init(struct HapticGeneratorContext *context) {
context->itfe = &gHapticGeneratorInterface;
@@ -114,7 +127,9 @@
context->param.distortionCornerFrequency = 300.0f;
context->param.distortionInputGain = 0.3f;
context->param.distortionCubeThreshold = 0.1f;
- context->param.distortionOutputGain = 1.5f;
+ context->param.distortionOutputGain = getFloatProperty(
+ "vendor.audio.hapticgenerator.distortion.output.gain", DEFAULT_DISTORTION_OUTPUT_GAIN);
+ ALOGD("Using distortion output gain as %f", context->param.distortionOutputGain);
context->state = HAPTICGENERATOR_STATE_INITIALIZED;
return 0;