level

level — RMS/Peak/Decaying Peak Level messager for audio/raw

Synopsis




            GstLevel;

Description

Element Information

plugin level
author Thomas <thomas@apestaart.org>
class Filter/Analyzer/Audio

Details

GstLevel

typedef struct {
  GstBaseTransform element;

  gboolean message;		/* whether or not to post messages */
  gdouble interval;		/* how many seconds between emits */

  gint rate;			/* caps variables */
  gint width;
  gint channels;

  gdouble decay_peak_ttl;	/* time to live for peak in seconds */
  gdouble decay_peak_falloff;	/* falloff in dB/sec */
  gint num_samples;		/* one-channel sample count since last emit */

  /* per-channel arrays for intermediate values */
  gdouble *CS;			/* normalized Cumulative Square */
  gdouble *peak;		/* normalized Peak value over buffer */
  gdouble *last_peak;		/* last normalized Peak value over interval */
  gdouble *decay_peak;		/* running decaying normalized Peak */
  gdouble *MS;			/* normalized Mean Square of buffer */
  gdouble *RMS_dB;		/* RMS in dB to emit */
  gdouble *decay_peak_age;	/* age of last peak in one-channel samples */
} GstLevel;