Mercurial > hg > qm-dsp
comparison dsp/tempotracking/DownBeat.cpp @ 339:9c8ee77db9de
Tidy real-to-complex FFT -- forward and inverse have different arguments, so make them separate functions; document
| author | Chris Cannam <c.cannam@qmul.ac.uk> |
|---|---|
| date | Wed, 02 Oct 2013 15:04:38 +0100 |
| parents | d5014ab8b0e5 |
| children | a2b3fd07d862 |
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| 338:35db1b24a848 | 339:9c8ee77db9de |
|---|---|
| 191 m_beatframe[j] = 0.0; | 191 m_beatframe[j] = 0.0; |
| 192 } | 192 } |
| 193 | 193 |
| 194 // Now FFT beat frame | 194 // Now FFT beat frame |
| 195 | 195 |
| 196 m_fft->process(false, m_beatframe, m_fftRealOut, m_fftImagOut); | 196 m_fft->forward(m_beatframe, m_fftRealOut, m_fftImagOut); |
| 197 | 197 |
| 198 // Calculate magnitudes | 198 // Calculate magnitudes |
| 199 | 199 |
| 200 for (size_t j = 0; j < m_beatframesize/2; ++j) { | 200 for (size_t j = 0; j < m_beatframesize/2; ++j) { |
| 201 newspec[j] = sqrt(m_fftRealOut[j] * m_fftRealOut[j] + | 201 newspec[j] = sqrt(m_fftRealOut[j] * m_fftRealOut[j] + |