gavl
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Detect peaks in the volume for steering normalizers and dynamic range compressors While normalizers and dynamic range controls are out of the scope of gavl, some low-level functionality can be provided. More...
Typedefs | |
typedef struct gavl_peak_detector_s | gavl_peak_detector_t |
Opaque structure for peak detector. | |
typedef void(* | gavl_update_peak_callback )(void *priv, int samples, double min, double max, double abs) |
Callback for getting the peaks across all channels. | |
typedef void(* | gavl_update_peaks_callback )(void *priv, int samples, const double *min, const double *max, const double *abs) |
Callback for getting the peaks for all channels separately. | |
Functions | |
GAVL_PUBLIC gavl_peak_detector_t * | gavl_peak_detector_create () |
Create peak detector. | |
GAVL_PUBLIC void | gavl_peak_detector_set_callbacks (gavl_peak_detector_t *pd, gavl_update_peak_callback peak_callback, gavl_update_peaks_callback peaks_callback, void *priv) |
Set callbacks. | |
GAVL_PUBLIC void | gavl_peak_detector_destroy (gavl_peak_detector_t *pd) |
Destroys a peak detector and frees all associated memory. | |
GAVL_PUBLIC void | gavl_peak_detector_set_format (gavl_peak_detector_t *pd, const gavl_audio_format_t *format) |
Set format for a peak detector. | |
GAVL_PUBLIC const gavl_audio_format_t * | gavl_peak_detector_get_format (gavl_peak_detector_t *pd) |
Get format. | |
GAVL_PUBLIC void | gavl_peak_detector_update (gavl_peak_detector_t *pd, gavl_audio_frame_t *frame) |
Feed the peak detector with a new frame. | |
GAVL_PUBLIC gavl_audio_sink_t * | gavl_peak_detector_get_sink (gavl_peak_detector_t *pd) |
Get the audio sink. | |
GAVL_PUBLIC void | gavl_peak_detector_get_peak (gavl_peak_detector_t *pd, double *min, double *max, double *abs) |
Get the peak volume across all channels. | |
GAVL_PUBLIC void | gavl_peak_detector_get_peaks (gavl_peak_detector_t *pd, double *min, double *max, double *abs) |
Get the peak volume for all channels separate. | |
GAVL_PUBLIC void | gavl_peak_detector_reset (gavl_peak_detector_t *pd) |
Reset a peak detector. | |
Detect peaks in the volume for steering normalizers and dynamic range compressors While normalizers and dynamic range controls are out of the scope of gavl, some low-level functionality can be provided.
typedef struct gavl_peak_detector_s gavl_peak_detector_t |
Opaque structure for peak detector.
You don't want to know what's inside.
typedef void(* gavl_update_peak_callback)(void *priv, int samples, double min, double max, double abs) |
Callback for getting the peaks across all channels.
priv | Client data |
samples | Number of samples of last update call |
min | Minimum value (scaled betwen -1.0 and 1.0) |
min | Maximum value (scaled betwen -1.0 and 1.0) |
abs | Absolute value (scaled betwen 0.0 and 1.0) |
Since 1.5.0
typedef void(* gavl_update_peaks_callback)(void *priv, int samples, const double *min, const double *max, const double *abs) |
Callback for getting the peaks for all channels separately.
priv | Client data |
samples | Number of samples of last update call |
min | Minimum value (scaled betwen -1.0 and 1.0) |
min | Maximum value (scaled betwen -1.0 and 1.0) |
abs | Absolute value (scaled betwen 0.0 and 1.0) |
Since 1.5.0
GAVL_PUBLIC gavl_peak_detector_t* gavl_peak_detector_create | ( | ) |
Create peak detector.
GAVL_PUBLIC void gavl_peak_detector_set_callbacks | ( | gavl_peak_detector_t * | pd, |
gavl_update_peak_callback | peak_callback, | ||
gavl_update_peaks_callback | peaks_callback, | ||
void * | priv | ||
) |
Set callbacks.
pd | A peak detector |
peak_callback | Callback for overall peaks or NULL |
peaks_callback | Callback for per channel peaks or NULL |
priv | Client data passed to the callbacks |
Since 1.5.0
GAVL_PUBLIC void gavl_peak_detector_destroy | ( | gavl_peak_detector_t * | pd | ) |
Destroys a peak detector and frees all associated memory.
pd | A peak detector |
GAVL_PUBLIC void gavl_peak_detector_set_format | ( | gavl_peak_detector_t * | pd, |
const gavl_audio_format_t * | format | ||
) |
Set format for a peak detector.
pd | A peak detector |
format | The format subsequent frames will be passed with |
This function can be called multiple times with one instance. It also calls gavl_peak_detector_reset.
GAVL_PUBLIC const gavl_audio_format_t* gavl_peak_detector_get_format | ( | gavl_peak_detector_t * | pd | ) |
Get format.
pd | A peak detector |
Since 1.5.0
GAVL_PUBLIC void gavl_peak_detector_update | ( | gavl_peak_detector_t * | pd, |
gavl_audio_frame_t * | frame | ||
) |
Feed the peak detector with a new frame.
pd | A peak detector |
frame | An audio frame |
GAVL_PUBLIC gavl_audio_sink_t* gavl_peak_detector_get_sink | ( | gavl_peak_detector_t * | pd | ) |
Get the audio sink.
pd | A peak detector |
Use the returned sink for passing audio frames as an alternative to gavl_peak_detector_update
Since 1.5.0
GAVL_PUBLIC void gavl_peak_detector_get_peak | ( | gavl_peak_detector_t * | pd, |
double * | min, | ||
double * | max, | ||
double * | abs | ||
) |
Get the peak volume across all channels.
pd | A peak detector |
min | Returns minimum amplitude |
max | Returns maximum amplitude |
abs | Returns maximum absolute amplitude |
The returned amplitudes are normalized such that the minimum amplitude corresponds to -1.0, the maximum amplitude corresponds to 1.0.
GAVL_PUBLIC void gavl_peak_detector_get_peaks | ( | gavl_peak_detector_t * | pd, |
double * | min, | ||
double * | max, | ||
double * | abs | ||
) |
Get the peak volume for all channels separate.
pd | A peak detector |
min | Returns minimum amplitude |
max | Returns maximum amplitude |
abs | Returns maximum absolute amplitude |
The returned amplitudes are normalized such that the minimum amplitude corresponds to -1.0, the maximum amplitude corresponds to 1.0.
GAVL_PUBLIC void gavl_peak_detector_reset | ( | gavl_peak_detector_t * | pd | ) |
Reset a peak detector.
pd | A peak detector |