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Commit 209821c7 authored by Marco Nelissen's avatar Marco Nelissen
Browse files

Increase the number of useful bits in the spectrum. 

Change-Id: I3efc2ac8db689285566df35cb6f594aab41141db
parent b517e006

media/libmedia/Visualizer.cpp

+7 −2
Original line number Diff line number Diff line
@@ -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;