use libc's powerof2
Instead of rolling our own powerof2 function, use the version provided
by libc. In particular, this version is not ubsan safe, whereas the libc
version is. See https://android-review.googlesource.com/c/platform/bionic/+/932279
Test: compiles and boots
Change-Id: I0dd39254357826c14c3185a5e6332faa90975f01
diff --git a/media/libeffects/dynamicsproc/dsp/DPFrequency.cpp b/media/libeffects/dynamicsproc/dsp/DPFrequency.cpp
index d06fd70..1f53978 100644
--- a/media/libeffects/dynamicsproc/dsp/DPFrequency.cpp
+++ b/media/libeffects/dynamicsproc/dsp/DPFrequency.cpp
@@ -20,6 +20,7 @@
#include <log/log.h>
#include "DPFrequency.h"
#include <algorithm>
+#include <sys/param.h>
namespace dp_fx {
@@ -30,10 +31,6 @@
#define CIRCULAR_BUFFER_UPSAMPLE 4 //4 times buffer size
static constexpr float MIN_ENVELOPE = 1e-6f; //-120 dB
-//helper functionS
-static inline bool isPowerOf2(unsigned long n) {
- return (n & (n - 1)) == 0;
-}
static constexpr float EPSILON = 0.0000001f;
static inline bool isZero(float f) {
@@ -151,7 +148,7 @@
} else if (mBlockSize < MIN_BLOCKSIZE) {
mBlockSize = MIN_BLOCKSIZE;
} else {
- if (!isPowerOf2(blockSize)) {
+ if (!powerof2(blockSize)) {
//find next highest power of 2.
mBlockSize = 1 << (32 - __builtin_clz(blockSize));
}