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visualizer: frequency spectrum: normalize bar heights a little more

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This commit is contained in:
Andrzej Rybczak
2014-09-03 13:04:36 +02:00
parent 416b77e122
commit 529f27b9b0
1 changed files with 2 additions and 2 deletions
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src/visualizer.cpp
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@@ -204,7 +204,7 @@ void Visualizer::DrawFrequencySpectrum(int16_t *buf, ssize_t samples, size_t y_o
// count magnitude of each frequency and scale it to fit the screen // count magnitude of each frequency and scale it to fit the screen
for (unsigned i = 0; i < m_fftw_results; ++i) for (unsigned i = 0; i < m_fftw_results; ++i)
m_freq_magnitudes[i] = sqrt(m_fftw_output[i][0]*m_fftw_output[i][0] + m_fftw_output[i][1]*m_fftw_output[i][1])/1e5*height; m_freq_magnitudes[i] = sqrt(m_fftw_output[i][0]*m_fftw_output[i][0] + m_fftw_output[i][1]*m_fftw_output[i][1])/2e4*height;
const size_t win_width = w.getWidth(); const size_t win_width = w.getWidth();
// cut bandwidth a little to achieve better look // cut bandwidth a little to achieve better look
@@ -219,7 +219,7 @@ void Visualizer::DrawFrequencySpectrum(int16_t *buf, ssize_t samples, size_t y_o
// buff higher frequencies // buff higher frequencies
bar_height *= log2(2 + i); bar_height *= log2(2 + i);
// moderately normalize the heights // moderately normalize the heights
bar_height = pow(bar_height, 0.6); bar_height = pow(bar_height, 0.5);
bar_real_height = std::min(size_t(bar_height/freqs_per_col), height); bar_real_height = std::min(size_t(bar_height/freqs_per_col), height);
const size_t start_y = y_offset > 0 ? y_offset : height-bar_real_height; const size_t start_y = y_offset > 0 ? y_offset : height-bar_real_height;
const size_t stop_y = std::min(bar_real_height+start_y, w.getHeight()); const size_t stop_y = std::min(bar_real_height+start_y, w.getHeight());