Module telephone_event 

RFC 4733 telephone-event (DTMF) payload helpers.

The Encoder/Decoder move no audio samples — telephone-event is an event stream, not a waveform; they exist so CodecType::TelephoneEvent slots into codec tables.

Structs

DtmfEvent

DtmfPacket

TelephoneEventDecoder

TelephoneEventEncoder

Constants

DEFAULT_EVENT_MS

EVENT_CLOCK

Functions

digit_to_event

Character → RFC 4733 event code (0-9, *=10, #=11, A-D=12-15).

dtmf_press

dtmf_sequence

Packet sequence for one digit: interims + End ×3, marker on the first. duration_ms/clock_rate are untrusted — clamped to u16::MAX wire ticks.

encode_event_payload

event(8) | E(1) R(1) volume(6) | duration(16).

event_to_digit

RFC 4733 event code → character.

parse_telephone_event

Parse a telephone-event payload; with multiple 4-byte blocks the last wins.