`#include <onsetsds.h>`

Collaboration diagram for OnsetsDS:

## Data Fields | |

float * | data |

float * | psp |

Peak Spectral Profile - size is numbins+2, data is stored in order dc through to nyquist. | |

float * | odfvals |

float * | sortbuf |

float * | other |

OdsPolarBuf * | curr |

float | srate |

The sampling rate of the input audio. Set by onsetsds_init(). | |

float | relaxtime |

Do NOT set this directly. Use onsetsds_setrelax() which will also update relaxcoef. | |

float | relaxcoef |

Relaxation coefficient (memory coefficient). See also onsetsds_setrelax(). | |

float | floor |

float | odfparam |

float | normfactor |

Value used internally to scale ODF value according to the FFT frame size. Automatically set by onsetsds_init(). | |

float | odfvalpost |

float | odfvalpostprev |

float | thresh |

int | odftype |

Choose from onsetsds_odf_types. | |

int | whtype |

Choose from onsetsds_wh_types. | |

int | fftformat |

Choose from onsetsds_fft_types. | |

bool | whiten |

Whether to apply whitening - onsetsds_init() decides this on your behalf. | |

bool | detected |

Output val - true if onset detected in curr frame. | |

bool | logmags |

bool | med_odd |

Whether median span is odd or not (used internally). | |

unsigned int | medspan |

Number of frames used in median calculation. | |

unsigned int | mingap |

Size of enforced gap between detections, measured in FFT frames. | |

unsigned int | gapleft |

size_t | fftsize |

size_t | numbins |

float* OnsetsDS::data |

"data" is a pointer to the memory that must be EXTERNALLY allocated. Other pointers will point to locations within this memory.

float * OnsetsDS::psp |

Peak Spectral Profile - size is numbins+2, data is stored in order dc through to nyquist.

float * OnsetsDS::odfvals |

float * OnsetsDS::sortbuf |

float * OnsetsDS::other |

float OnsetsDS::srate |

The sampling rate of the input audio. Set by onsetsds_init().

float OnsetsDS::relaxtime |

Do NOT set this directly. Use onsetsds_setrelax() which will also update relaxcoef.

float OnsetsDS::relaxcoef |

Relaxation coefficient (memory coefficient). See also onsetsds_setrelax().

float OnsetsDS::floor |

floor - the lowest value that a PSP magnitude can take.

float OnsetsDS::odfparam |

A parameter for the ODF. For most this is a magnitude threshold for a single bin to be considered; but for ODS_ODF_MKL it is the "epsilon" parameter.

float OnsetsDS::normfactor |

Value used internally to scale ODF value according to the FFT frame size. Automatically set by onsetsds_init().

float OnsetsDS::odfvalpost |

float OnsetsDS::odfvalpostprev |

float OnsetsDS::thresh |

Threshold (of ODF value, after median processing) for detection. Values between 0 and 1 are expected, but outside this range may sometimes be appropriate too.

Choose from onsetsds_odf_types.

int OnsetsDS::whtype |

Choose from onsetsds_wh_types.

Choose from onsetsds_fft_types.

bool OnsetsDS::whiten |

Whether to apply whitening - onsetsds_init() decides this on your behalf.

bool OnsetsDS::detected |

Output val - true if onset detected in curr frame.

bool OnsetsDS::logmags |

NOT YET USED: Whether to convert magnitudes to log domain before processing. This is done as follows: Magnitudes below a log-lower-limit threshold (ODS_LOG_LOWER_LIMIT) are pushed up to that threshold (to avoid log(0) infinity problems), then the log is taken. The values are re-scaled to a similar range as the linear-domain values (assumed to lie between zero and approximately one) by subtracting log(ODS_LOG_LOWER_LIMIT) and then dividing by abs(log(ODS_LOG_LOWER_LIMIT)).

bool OnsetsDS::med_odd |

Whether median span is odd or not (used internally).

unsigned int OnsetsDS::medspan |

Number of frames used in median calculation.

unsigned int OnsetsDS::mingap |

Size of enforced gap between detections, measured in FFT frames.

unsigned int OnsetsDS::gapleft |

size_t OnsetsDS::fftsize |

size_t OnsetsDS::numbins |

The documentation for this struct was generated from the following file: