diff options
| -rw-r--r-- | media/libmedia/Visualizer.cpp | 9 |
1 files changed, 7 insertions, 2 deletions
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 @@ status_t Visualizer::doFft(uint8_t *fft, uint8_t *waveform) } 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; |