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Object Hierarchy
GObject ╰── GInitiallyUnowned ╰── GstObject ╰── GstElement ╰── GstRTPBaseDepayload ╰── GstRtpDTMFDepay
Description
This element takes RTP DTMF packets and produces sound. It also emits a message on the GstBus.
The message is called "dtmf-event" and has the following fields
| Name | GType | Possible values | Purpose |
|---|---|---|---|
| type | G_TYPE_INT | 0-1 | Which of the two methods specified in RFC 2833 to use. The value should be 0 for tones and 1 for named events. Tones are specified by their frequencies and events are specied by their number. This element currently only recognizes events. Do not confuse with "method" which specified the output. |
| number | G_TYPE_INT | 0-16 | The event number. |
| volume | G_TYPE_INT | 0-36 | This field describes the power level of the tone, expressed in dBm0 after dropping the sign. Power levels range from 0 to -63 dBm0. The range of valid DTMF is from 0 to -36 dBm0. |
| method | G_TYPE_INT | 1 | This field will always been 1 (ie RTP event) from this element. |
Synopsis
Element Information
plugin |
dtmf |
author |
Youness Alaoui <youness.alaoui@collabora.co.uk> |
class |
Codec/Depayloader/Network |
Element Pads
name |
sink |
direction |
sink |
presence |
always |
details |
application/x-rtp, media=(string)audio, payload=(int)[ 96, 127 ], clock-rate=(int)[ 0, 2147483647 ], encoding-name=(string)TELEPHONE-EVENT |
name |
src |
direction |
source |
presence |
always |
details |
audio/x-raw, format=(string)S16LE, rate=(int)[ 1, 2147483647 ], channels=(int)1 |
Property Details
The “max-duration” property
“max-duration” guint
The maxumimum duration (ms) of the outgoing soundpacket. (0 = no limit).
Flags: Read / Write
Default value: 0
The “unit-time” property
“unit-time” guint
The smallest unit (ms) the duration must be a multiple of (0 disables it).
Flags: Read / Write
Allowed values: <= 1000
Default value: 0