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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>GstRTPPayloadInfo: GStreamer Base Plugins 1.0 Library Reference Manual</title>
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<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Library Reference Manual">
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<link rel="up" href="gstreamer-rtp.html" title="RTP Library">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
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Description
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GstRTPPayloadInfo
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GstRTPPayloadInfo — Helper methods for dealing with RTP payloads
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Functions
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#define
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GST_RTP_PAYLOAD_IS_DYNAMIC()
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const GstRTPPayloadInfo *
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gst_rtp_payload_info_for_name ()
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const GstRTPPayloadInfo *
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gst_rtp_payload_info_for_pt ()
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Types and Values
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enum
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GstRTPPayload
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struct
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GstRTPPayloadInfo
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Includes
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#include <gst/rtp/gstrtppayload.h>
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Description
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The GstRTPPayloads helper functions makes it easy to deal with static and dynamic
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payloads. Its main purpose is to retrieve properties such as the default clock-rate
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and get session bandwidth information.
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Functions
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GST_RTP_PAYLOAD_IS_DYNAMIC()
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#define GST_RTP_PAYLOAD_IS_DYNAMIC(pt) ((pt) >= 96 && (pt) <= 127)
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Check if pt
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is a dynamic payload type.
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Parameters
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pt
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a payload type
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gst_rtp_payload_info_for_name ()
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const GstRTPPayloadInfo *
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gst_rtp_payload_info_for_name (const gchar *media,
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const gchar *encoding_name);
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Get the GstRTPPayloadInfo for media
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and encoding_name
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. This function is
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mostly used to get the default clock-rate and bandwidth for dynamic payload
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types specified with media
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and encoding
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name.
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The search for encoding_name
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will be performed in a case insensitve way.
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Parameters
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media
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the media to find
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encoding_name
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the encoding name to find
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Returns
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a GstRTPPayloadInfo or NULL when no info could be found.
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gst_rtp_payload_info_for_pt ()
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const GstRTPPayloadInfo *
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gst_rtp_payload_info_for_pt (guint8 payload_type);
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Get the GstRTPPayloadInfo for payload_type
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. This function is
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mostly used to get the default clock-rate and bandwidth for static payload
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types specified with payload_type
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.
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Parameters
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payload_type
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the payload_type to find
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Returns
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a GstRTPPayloadInfo or NULL when no info could be found.
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Types and Values
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enum GstRTPPayload
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Standard predefined fixed payload types.
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The official list is at:
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http://www.iana.org/assignments/rtp-parameters
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Audio:
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reserved: 19
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unassigned: 20-23,
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Video:
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unassigned: 24, 27, 29, 30, 35-71, 77-95
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Reserved for RTCP conflict avoidance: 72-76
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Members
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GST_RTP_PAYLOAD_PCMU
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ITU-T G.711. mu-law audio (RFC 3551)
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GST_RTP_PAYLOAD_1016
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RFC 3551 says reserved
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GST_RTP_PAYLOAD_G721
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RFC 3551 says reserved
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GST_RTP_PAYLOAD_GSM
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GSM audio
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GST_RTP_PAYLOAD_G723
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ITU G.723.1 audio
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GST_RTP_PAYLOAD_DVI4_8000
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IMA ADPCM wave type (RFC 3551)
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GST_RTP_PAYLOAD_DVI4_16000
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IMA ADPCM wave type (RFC 3551)
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GST_RTP_PAYLOAD_LPC
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experimental linear predictive encoding
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GST_RTP_PAYLOAD_PCMA
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ITU-T G.711 A-law audio (RFC 3551)
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GST_RTP_PAYLOAD_G722
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ITU-T G.722 (RFC 3551)
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GST_RTP_PAYLOAD_L16_STEREO
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stereo PCM
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GST_RTP_PAYLOAD_L16_MONO
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mono PCM
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GST_RTP_PAYLOAD_QCELP
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EIA & TIA standard IS-733
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GST_RTP_PAYLOAD_CN
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Comfort Noise (RFC 3389)
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GST_RTP_PAYLOAD_MPA
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Audio MPEG 1-3.
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GST_RTP_PAYLOAD_G728
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ITU-T G.728 Speech coder (RFC 3551)
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GST_RTP_PAYLOAD_DVI4_11025
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IMA ADPCM wave type (RFC 3551)
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GST_RTP_PAYLOAD_DVI4_22050
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IMA ADPCM wave type (RFC 3551)
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GST_RTP_PAYLOAD_G729
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ITU-T G.729 Speech coder (RFC 3551)
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GST_RTP_PAYLOAD_CELLB
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See RFC 2029
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GST_RTP_PAYLOAD_JPEG
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ISO Standards 10918-1 and 10918-2 (RFC 2435)
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GST_RTP_PAYLOAD_NV
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nv encoding by Ron Frederick
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GST_RTP_PAYLOAD_H261
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ITU-T Recommendation H.261 (RFC 2032)
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GST_RTP_PAYLOAD_MPV
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Video MPEG 1 & 2 (RFC 2250)
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GST_RTP_PAYLOAD_MP2T
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MPEG-2 transport stream (RFC 2250)
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GST_RTP_PAYLOAD_H263
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Video H263 (RFC 2190)
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struct GstRTPPayloadInfo
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struct GstRTPPayloadInfo {
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guint8 payload_type;
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const gchar *media;
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const gchar *encoding_name;
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guint clock_rate;
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const gchar *encoding_parameters;
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guint bitrate;
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};
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Structure holding default payload type information.
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Members
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guint8 payload_type;
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payload type, -1 means dynamic
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const gchar *media;
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the media type(s), usually "audio", "video", "application", "text",
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"message".
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const gchar *encoding_name;
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the encoding name of pt
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guint clock_rate;
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default clock rate, 0 = unknown/variable
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const gchar *encoding_parameters;
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encoding parameters. For audio this is the number of
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channels. NULL = not applicable.
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guint bitrate;
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the bitrate of the media. 0 = unknown/variable.
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See Also
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gstrtpbuffer
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