monoscope

monoscope — Displays a highly stabilised waveform of audio input

Synopsis

                    GstMonoscope;

Description

Monoscope is an audio visualisation element. It creates a coloured curve of the audio signal like on an oscilloscope.

Example launch line

gst-launch -v audiotestsrc ! audioconvert ! monoscope ! ffmpegcolorspace ! ximagesink

Synopsis

Element Information

plugin monoscope
author Richard Boulton <richard@tartarus.org>
class Visualization

Element Pads

name sink
direction sink
presence always
details audio/x-raw-int, rate=(int)[ 1, 2147483647 ], channels=(int)2, endianness=(int)1234, width=(int)16, depth=(int)16, signed=(boolean)true
name src
direction source
presence always
details video/x-raw-rgb, bpp=(int)32, depth=(int)24, endianness=(int)4321, red_mask=(int)65280, green_mask=(int)16711680, blue_mask=(int)-16777216, width=(int)256, height=(int)128, framerate=(fraction)[ 0/1, 2147483647/1 ]

Details

GstMonoscope

typedef struct {
  GstElement element;

  /* pads */
  GstPad      *sinkpad;
  GstPad      *srcpad;

  GstAdapter  *adapter;

  guint64      next_ts;             /* expected timestamp of the next frame */
  guint64      frame_duration;      /* video frame duration    */
  gint         rate;                /* sample rate             */
  guint        bps;                 /* bytes per sample        */
  guint        spf;                 /* samples per video frame */

  GstSegment   segment;

  /* QoS stuff *//* with LOCK */
  gdouble      proportion;
  GstClockTime earliest_time;

  /* video state */
  gint         fps_num;
  gint         fps_denom;
  gint         width;
  gint         height;
  guint        outsize;

  /* visualisation state */
  struct monoscope_state *visstate;
} GstMonoscope;

See Also

goom