am 8952df72: am 4b440268: am c929677e: Merge "Increase the number of useful bits in the spectrum." into gingerbread
* commit '8952df72402d8edbc60a0285f0dc7e8fce29a96f':
Increase the number of useful bits in the spectrum.
diff --git a/media/libmedia/Visualizer.cpp b/media/libmedia/Visualizer.cpp
index a660429..43571cf 100644
--- a/media/libmedia/Visualizer.cpp
+++ b/media/libmedia/Visualizer.cpp
@@ -219,8 +219,13 @@
}
for (uint32_t i = 0; i < mCaptureSize; i += 2) {
- fft[i] = workspace[i >> 1] >> 24;
- fft[i + 1] = workspace[i >> 1] >> 8;
+ short tmp = workspace[i >> 1] >> 21;
+ while (tmp > 127 || tmp < -128) tmp >>= 1;
+ fft[i] = tmp;
+ tmp = workspace[i >> 1];
+ tmp >>= 5;
+ while (tmp > 127 || tmp < -128) tmp >>= 1;
+ fft[i + 1] = tmp;
}
return NO_ERROR;