bitlair/bitvis
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Added: lowpass the output values

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This commit is contained in:
Bob 2012-11-08 22:01:14 +01:00
parent d872a79a27
commit 19cbbee526
2 changed files with 12 additions and 2 deletions
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13
src/bitvis.cpp
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@ -39,6 +39,7 @@ CBitVis::CBitVis(int argc, char *argv[])
m_buf = NULL;
m_bufsize = 0;
m_fftbuf = NULL;
m_displaybuf = NULL;
m_samplecounter = 0;
m_nrffts = 0;
}
@ -180,6 +181,7 @@ void CBitVis::ProcessAudio()
{
const int bins = 1024;
const int lines = 46;
const float decay = 0.5;
int samplerate;
int samples;
if ((samples = m_jackclient.GetAudio(m_buf, m_bufsize, samplerate)) > 0)
@ -191,6 +193,12 @@ void CBitVis::ProcessAudio()
memset(m_fftbuf, 0, bins * sizeof(float));
}
if (!m_displaybuf)
{
m_displaybuf = new float[lines];
memset(m_displaybuf, 0, lines * sizeof(float));
}
int additions = 0;
for (int i = 1; i < lines; i++)
additions += i;
@ -214,7 +222,7 @@ void CBitVis::ProcessAudio()
m_fftbuf[j] += cabsf(m_fft.m_outbuf[j]) / m_fft.m_bufsize;
}
if (m_samplecounter % (samplerate / 20) == 0)
if (m_samplecounter % (samplerate / 30) == 0)
{
m_fft.ApplyWindow();
fftwf_execute(m_fft.m_plan);
@ -232,7 +240,8 @@ void CBitVis::ProcessAudio()
for (int k = bin; k < bin + nrbins; k++)
outval += m_fftbuf[k] / m_nrffts;
out += string(Clamp(Round32(outval * 300.0f), 1, 100), '|');
m_displaybuf[j] = m_displaybuf[j] * decay + outval * (1.0f - decay);
out += string(Clamp(Round32(m_displaybuf[j] * 300.0f), 1, 100), '|');
out += '\n';
start = next;

1
src/bitvis.h
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@ -40,6 +40,7 @@ class CBitVis
float* m_buf;
int m_bufsize;
float* m_fftbuf;
float* m_displaybuf;
int m_samplecounter;
int m_nrffts;