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payload(3) [debian man page]

Payload types and formats.(3)				     Library Functions Manual				     Payload types and formats.(3)

NAME

       Payload types and formats. -

   Classes
       class PayloadFormat
	   Base payload format class.
       class StaticPayloadFormat
	   Static payload format objects.
       class DynamicPayloadFormat
	   Dynamic payload format objects.

   Typedefs
       typedef uint8 PayloadType
	   RTP payload type numeric identifier.

   Enumerations
       enum StaticPayloadType { sptPCMU =  0, firstStaticPayloadType =	sptPCMU, sptG726_32 =  2, sptGSM, sptG723, sptDVI4_8000, sptDVI4_16000,
	   sptLPC, sptPCMA, sptG722, sptL16_DUAL, sptL16_MONO, sptQCELP, sptMPA =  14, sptG728, sptDVI4_11025, sptDVI4_22050, sptG729,
	   lastStaticAudioPayloadType =  sptG729, sptCELB =  25, sptJPEG, sptNV =  28, sptH261 =  31, sptMPV, sptMP2T, sptH263,
	   lastStaticPayloadType =  sptH263 }
	   RTP static payload types (default bindings) defined in the AVP profile.

   Variables
       const PayloadType ptINVALID = 128
	   Predefined value for invalid or uninitialized payload type variables.

Detailed Description
Typedef Documentation
   PayloadType
       RTP payload type numeric identifier. At the RTP level a payload format is identified with a 7 bit number. This number is binded to a
       payload format through non-RTP means (SIP, SAP, application specific rules, etc.)

Enumeration Type Documentation
   enum StaticPayloadType
       RTP static payload types (default bindings) defined in the AVP profile.

       Enumerator:

       sptPCMU
	      ITU-T G.711. mu-law audio 8 Khz (RFC 1890)

       firstStaticPayloadType

       sptG726_32
	      ITU-T G.726. ADPCM audio (RFC 1890)

       sptGSM GSM audio (RFC 1890)

       sptG723
	      ITU-T G.723. MP-MLQ ACELP audio (RFC 1890)

       sptDVI4_8000
	      Modified IMA ADPCM audio 8Khz (RFC 1890)

       sptDVI4_16000
	      Modified IMA ADPCM audio 16Khz (RFC 1890)

       sptLPC LPC audio (RFC 1890)

       sptPCMA
	      ITU-T G.711 A-law audio 8 Khz (RFC 1890)

       sptG722
	      Audio (RFCs 1890, 3047)

       sptL16_DUAL
	      Linear uncompressed dual audio (RFC 1890)

       sptL16_MONO
	      Linear uncompressed mono audio (RFC 1890)

       sptQCELP
	      Audio at 8000 hz.

       sptMPA MPEG Audio elem. stream (RFCs 1890, 2250)

       sptG728
	      ITU-T G.728. LD-CELP audio.

       sptDVI4_11025
	      DVI audio at 11025 hz (by Joseph Di Pol)

       sptDVI4_22050
	      DVI audio at 22050 hz (by Joseph Di Pol)

       sptG729
	      ITU-T G.729. CS-ACELP audio.

       lastStaticAudioPayloadType

       sptCELB
	      Sun's propietary video (RFCs 1890, 2029)

       sptJPEG
	      JPEG (ISO 10918) video (RFCs 1890, 2435)

       sptNV  Ron Frederick's nv audio (RFC 1890)

       sptH261
	      ITU-T H.261 video (RFCs 1890, 2032)

       sptMPV MPEG Video elem. stream (RFCs 1890, 2250)

       sptMP2T
	      MPEG 2 Transport stream (RFCs 1890, 2250)

       sptH263
	      ITU-T H.263 video (RFCs 2190, 2429)

       lastStaticPayloadType

Variable Documentation
   const PayloadType ptINVALID = 128
       Predefined value for invalid or uninitialized payload type variables.

Author
       Generated automatically by Doxygen for ccRTP from the source code.

ccRTP								  Sat Jun 23 2012				     Payload types and formats.(3)

Check Out this Related Man Page

ISDNTEL(4)						   BSD Kernel Interfaces Manual 						ISDNTEL(4)

NAME

     isdntel -- ISDN B-channel telephony interface driver

SYNOPSIS

     pseudo-device isdntel count

DESCRIPTION

     The isdntel driver provides an interface to the B-channel for telephony applications and is currently used by the isdnd(8) for answering
     machine support. The driver is part of the isdn4bsd package.

     The lower six bits of the driver's minor number are used to specify a unit number, whereas the upper two bits specify a functionality.

     Functionality zero is the usual telephony data stream i/o driver.

     Functionality one is used to enable commands to dial out and hang up and receive responses about the state of the dial out progress and sta-
     tus.  This commands may change in the future, for details see the file /usr/include/netisdn/i4b_tel_ioctl.h and the isdntel(8) utility.

     The telephony data stream comes out of the line in a bit-reversed format, so the isdntel driver does the bit-reversion process in any case.

     Additionally, the user can specify to do A-law to mu-law, mu-law to A-law or no conversion at all in the isdntel driver by using the
     isdntelctl(8) utility.

     The driver is able to process several ioctl's:

	   I4B_TEL_GETAUDIOFMT
		   get currently used audio format conversion.
	   I4B_TEL_SETAUDIOFMT
		   set currently used audio format conversion.
	   I4B_TEL_EMPTYINPUTQUEUE
		   clear the input queue.

     For the I4B_TEL_GETAUDIOFMT and I4B_TEL_SETAUDIOFMT, the following parameters are available:

	   CVT_NONE
		   do no A-law/mu-law audio format conversion. The conversion path looks like this:

		   USER <--> bitreversing <--> ISDN-line

	   CVT_ALAW2ULAW
		   set audio format conversion to do an audio conversion from A-law (on the ISDN line) to mu-law (in the userland).  The read(2)
		   conversion path looks like this:

		   USER <-- mu-law/A-law <-- bitreversing <-- ISDN-line

		   and the write(2) conversion path looks like this:

		   USER --> mu-law/A-law --> bitreversing --> ISDN-line

	   CVT_ULAW2ALAW
		   set audio format conversion to do an audio conversion from mu-law (on the ISDN line) to A-law (in the userland).  The read(2)
		   conversion path looks like this:

		   USER <-- A-law/mu-law <-- bitreversing <-- ISDN-line

		   and the write(2) conversion path looks like this:

		   USER --> A-law/mu-law --> bitreversing --> ISDN-line

SEE ALSO

     isdnd.rc(5), isdnd(8), isdntel(8), isdntelctl(8)

STANDARDS

     A-law and mu-law are specified in ITU Recommendation G.711.

AUTHORS

     The isdntel device driver and this man page were written by Hellmuth Michaelis <hm@kts.org>.

BSD
								  April 21, 1999							       BSD
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