oRTP 0.24.1

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rtpsession.h File Reference

The RtpSession api. More...

`#include <ortp/port.h>`
`#include <ortp/rtp.h>`
`#include <ortp/payloadtype.h>`
`#include <ortp/rtpprofile.h>`
`#include <ortp/sessionset.h>`
`#include <ortp/rtcp.h>`
`#include <ortp/str_utils.h>`
`#include <ortp/rtpsignaltable.h>`
`#include <ortp/event.h>`

Go to the source code of this file.

## Data Structures
struct | _JBParameters
struct | _JitterControl
struct | _WaitPoint
struct | _RtpTransportModifier
struct | _RtpTransport
struct | _OrtpNetworkSimulatorParams
struct | _OrtpNetworkSimulatorCtx
struct | OrtpRtcpSendAlgorithm
struct | OrtpRtcpXrMediaCallbacks
struct | OrtpRtcpXrConfiguration
struct | OrtpRtcpXrStats
struct | OrtpRtcpTmmbrInfo
struct | _OrtpAddress
struct | _OrtpStream
struct | _RtpStream
struct | _RtcpStream
struct | _RtpSession

## Macros
#define | ORTP_AVPF_FEATURE_NONE 0
#define | ORTP_AVPF_FEATURE_TMMBR (1 << 0)
#define | ORTP_RTCP_XR_UNAVAILABLE_PARAMETER 127
#define | rtp_session_remove_contributing_sources rtp_session_remove_contributing_source
#define | rtp_session_set_flag(session, flag) (session)->flags|=(flag)
#define | rtp_session_unset_flag(session, flag) (session)->flags&=~(flag)

## Typedefs
typedef struct _JBParameters | JBParameters
typedef struct _JitterControl | JitterControl
typedef struct _WaitPoint | WaitPoint
typedef struct _RtpTransportModifier | RtpTransportModifier
typedef struct _RtpTransport | RtpTransport
typedef enum _OrtpNetworkSimulatorMode | OrtpNetworkSimulatorMode
typedef struct _OrtpNetworkSimulatorParams | OrtpNetworkSimulatorParams
typedef struct _OrtpNetworkSimulatorCtx | OrtpNetworkSimulatorCtx
typedef struct OrtpRtcpSendAlgorithm | OrtpRtcpSendAlgorithm
typedef OrtpRtcpXrPlcStatus(* | OrtpRtcpXrPlcCallback )(unsigned long userdata)
typedef int(* | OrtpRtcpXrSignalLevelCallback )(unsigned long userdata)
typedef int(* | OrtpRtcpXrNoiseLevelCallback )(unsigned long userdata)
typedef float(* | OrtpRtcpXrAverageQualityIndicatorCallback )(unsigned long userdata)
typedef struct OrtpRtcpXrMediaCallbacks | OrtpRtcpXrMediaCallbacks
typedef struct OrtpRtcpXrConfiguration | OrtpRtcpXrConfiguration
typedef struct OrtpRtcpXrStats | OrtpRtcpXrStats
typedef struct OrtpRtcpTmmbrInfo | OrtpRtcpTmmbrInfo
typedef struct _OrtpAddress | OrtpAddress
typedef struct _OrtpStream | OrtpStream
typedef struct _RtpStream | RtpStream
typedef struct _RtcpStream | RtcpStream
typedef struct _RtpSession | RtpSession

## Enumerations
enum | RtpSessionMode { RTP_SESSION_RECVONLY, RTP_SESSION_SENDONLY, RTP_SESSION_SENDRECV }
enum | _OrtpNetworkSimulatorMode { OrtpNetworkSimulatorInvalid =-1, OrtpNetworkSimulatorInbound, OrtpNetworkSimulatorOutbound, OrtpNetworkSimulatorOutboundControlled }
enum | OrtpRtcpXrPlcStatus { OrtpRtcpXrNoPlc, OrtpRtcpXrSilencePlc, OrtpRtcpXrEnhancedPlc }
enum | OrtpRtcpXrRcvrRttMode { OrtpRtcpXrRcvrRttNone, OrtpRtcpXrRcvrRttAll, OrtpRtcpXrRcvrRttSender }
enum | OrtpRtcpXrStatSummaryFlag { OrtpRtcpXrStatSummaryLoss = (1 << 7), OrtpRtcpXrStatSummaryDup = (1 << 6), OrtpRtcpXrStatSummaryJitt = (1 << 5), OrtpRtcpXrStatSummaryTTL = (1 << 3), OrtpRtcpXrStatSummaryHL = (1 << 4) }

## Functions
ORTP_PUBLIC const char * | ortp_network_simulator_mode_to_string (OrtpNetworkSimulatorMode mode)
ORTP_PUBLIC OrtpNetworkSimulatorMode | ortp_network_simulator_mode_from_string (const char *str)
ORTP_PUBLIC RtpSession * | rtp_session_new (int mode)
ORTP_PUBLIC void | rtp_session_set_scheduling_mode (RtpSession *session, int yesno)
ORTP_PUBLIC void | rtp_session_set_blocking_mode (RtpSession *session, int yesno)
ORTP_PUBLIC void | rtp_session_set_profile (RtpSession *session, RtpProfile *profile)
ORTP_PUBLIC void | rtp_session_set_send_profile (RtpSession *session, RtpProfile *profile)
ORTP_PUBLIC void | rtp_session_set_recv_profile (RtpSession *session, RtpProfile *profile)
ORTP_PUBLIC RtpProfile * | rtp_session_get_profile (RtpSession *session)
ORTP_PUBLIC RtpProfile * | rtp_session_get_send_profile (RtpSession *session)
ORTP_PUBLIC RtpProfile * | rtp_session_get_recv_profile (RtpSession *session)
ORTP_PUBLIC int | rtp_session_signal_connect (RtpSession *session, const char *signal_name, RtpCallback cb, void *user_data)
ORTP_PUBLIC int | rtp_session_signal_disconnect_by_callback (RtpSession *session, const char *signal_name, RtpCallback cb)
ORTP_PUBLIC void | rtp_session_set_ssrc (RtpSession *session, uint32_t ssrc)
ORTP_PUBLIC uint32_t | rtp_session_get_send_ssrc (RtpSession *session)
ORTP_PUBLIC uint32_t | rtp_session_get_recv_ssrc (RtpSession *session)
ORTP_PUBLIC void | rtp_session_set_seq_number (RtpSession *session, uint16_t seq)
ORTP_PUBLIC uint16_t | rtp_session_get_seq_number (RtpSession *session)
ORTP_PUBLIC uint32_t | rtp_session_get_rcv_ext_seq_number (RtpSession *session)
ORTP_PUBLIC int | rtp_session_get_cum_loss (RtpSession *session)
ORTP_PUBLIC void | rtp_session_set_duplication_ratio (RtpSession *session, float ratio)
ORTP_PUBLIC void | rtp_session_enable_jitter_buffer (RtpSession *session, bool_t enabled)
ORTP_PUBLIC bool_t | rtp_session_jitter_buffer_enabled (const RtpSession *session)
ORTP_PUBLIC void | rtp_session_set_jitter_buffer_params (RtpSession *session, const JBParameters *par)
ORTP_PUBLIC void | rtp_session_get_jitter_buffer_params (RtpSession *session, JBParameters *par)
ORTP_PUBLIC void | rtp_session_set_jitter_compensation (RtpSession *session, int milisec)
ORTP_PUBLIC void | rtp_session_enable_adaptive_jitter_compensation (RtpSession *session, bool_t val)
ORTP_PUBLIC bool_t | rtp_session_adaptive_jitter_compensation_enabled (RtpSession *session)
ORTP_PUBLIC void | rtp_session_set_time_jump_limit (RtpSession *session, int miliseconds)
ORTP_PUBLIC int | rtp_session_join_multicast_group (RtpSession *session, const char *ip)
ORTP_PUBLIC int | rtp_session_set_local_addr (RtpSession *session, const char *addr, int rtp_port, int rtcp_port)
ORTP_PUBLIC int | rtp_session_get_local_port (const RtpSession *session)
ORTP_PUBLIC int | rtp_session_get_local_rtcp_port (const RtpSession *session)
ORTP_PUBLIC int | rtp_session_set_remote_addr_full (RtpSession *session, const char *rtp_addr, int rtp_port, const char *rtcp_addr, int rtcp_port)
ORTP_PUBLIC int | rtp_session_set_remote_addr_and_port (RtpSession *session, const char *addr, int rtp_port, int rtcp_port)
ORTP_PUBLIC int | rtp_session_set_remote_addr (RtpSession *session, const char *addr, int port)
ORTP_PUBLIC int | rtp_session_add_aux_remote_addr_full (RtpSession *session, const char *rtp_addr, int rtp_port, const char *rtcp_addr, int rtcp_port)
ORTP_PUBLIC void | rtp_session_clear_aux_remote_addr (RtpSession *session)
ORTP_PUBLIC void | rtp_session_set_sockets (RtpSession *session, int rtpfd, int rtcpfd)
ORTP_PUBLIC void | rtp_session_get_transports (const RtpSession *session, RtpTransport **rtptr, RtpTransport **rtcptr)
ORTP_PUBLIC ortp_socket_t | rtp_session_get_rtp_socket (const RtpSession *session)
ORTP_PUBLIC ortp_socket_t | rtp_session_get_rtcp_socket (const RtpSession *session)
ORTP_PUBLIC int | rtp_session_set_dscp (RtpSession *session, int dscp)
ORTP_PUBLIC int | rtp_session_get_dscp (const RtpSession *session)
ORTP_PUBLIC int | rtp_session_set_pktinfo (RtpSession *session, int activate)
ORTP_PUBLIC int | rtp_session_set_multicast_ttl (RtpSession *session, int ttl)
ORTP_PUBLIC int | rtp_session_get_multicast_ttl (RtpSession *session)
ORTP_PUBLIC int | rtp_session_set_multicast_loopback (RtpSession *session, int yesno)
ORTP_PUBLIC int | rtp_session_get_multicast_loopback (RtpSession *session)
ORTP_PUBLIC int | rtp_session_set_send_payload_type (RtpSession *session, int paytype)
ORTP_PUBLIC int | rtp_session_get_send_payload_type (const RtpSession *session)
ORTP_PUBLIC int | rtp_session_get_recv_payload_type (const RtpSession *session)
ORTP_PUBLIC int | rtp_session_set_recv_payload_type (RtpSession *session, int pt)
ORTP_PUBLIC int | rtp_session_set_payload_type (RtpSession *session, int pt)
ORTP_PUBLIC void | rtp_session_set_symmetric_rtp (RtpSession *session, bool_t yesno)
ORTP_PUBLIC bool_t | rtp_session_get_symmetric_rtp (const RtpSession *session)
ORTP_PUBLIC void | rtp_session_set_connected_mode (RtpSession *session, bool_t yesno)
ORTP_PUBLIC void | rtp_session_enable_rtcp (RtpSession *session, bool_t yesno)
ORTP_PUBLIC void | rtp_session_set_rtcp_report_interval (RtpSession *session, int value_ms)
ORTP_PUBLIC void | rtp_session_set_target_upload_bandwidth (RtpSession *session, int target_bandwidth)
ORTP_PUBLIC void | rtp_session_configure_rtcp_xr (RtpSession *session, const OrtpRtcpXrConfiguration *config)
ORTP_PUBLIC void | rtp_session_set_rtcp_xr_media_callbacks (RtpSession *session, const OrtpRtcpXrMediaCallbacks *cbs)
ORTP_PUBLIC void | rtp_session_set_ssrc_changed_threshold (RtpSession *session, int numpackets)
ORTP_PUBLIC mblk_t * | rtp_session_recvm_with_ts (RtpSession *session, uint32_t user_ts)
ORTP_PUBLIC mblk_t * | rtp_session_create_packet (RtpSession *session, int header_size, const uint8_t *payload, int payload_size)
ORTP_PUBLIC mblk_t * | rtp_session_create_packet_raw (const uint8_t *packet, int packet_size)
ORTP_PUBLIC mblk_t * | rtp_session_create_packet_with_data (RtpSession *session, uint8_t *payload, int payload_size, void(*freefn)(void *))
ORTP_PUBLIC mblk_t * | rtp_session_create_packet_in_place (RtpSession *session, uint8_t *buffer, int size, void(*freefn)(void *))
ORTP_PUBLIC int | rtp_session_sendm_with_ts (RtpSession *session, mblk_t *mp, uint32_t userts)
ORTP_PUBLIC int | rtp_session_recv_with_ts (RtpSession *session, uint8_t *buffer, int len, uint32_t ts, int *have_more)
ORTP_PUBLIC int | rtp_session_send_with_ts (RtpSession *session, const uint8_t *buffer, int len, uint32_t userts)
ORTP_PUBLIC void | rtp_session_register_event_queue (RtpSession *session, OrtpEvQueue *q)
ORTP_PUBLIC void | rtp_session_unregister_event_queue (RtpSession *session, OrtpEvQueue *q)
ORTP_PUBLIC float | rtp_session_compute_send_bandwidth (RtpSession *session)
ORTP_PUBLIC float | rtp_session_compute_recv_bandwidth (RtpSession *session)
ORTP_PUBLIC float | rtp_session_get_send_bandwidth (RtpSession *session)
ORTP_PUBLIC float | rtp_session_get_recv_bandwidth (RtpSession *session)
ORTP_PUBLIC float | rtp_session_get_rtp_send_bandwidth (RtpSession *session)
ORTP_PUBLIC float | rtp_session_get_rtp_recv_bandwidth (RtpSession *session)
ORTP_PUBLIC float | rtp_session_get_rtcp_send_bandwidth (RtpSession *session)
ORTP_PUBLIC float | rtp_session_get_rtcp_recv_bandwidth (RtpSession *session)
ORTP_PUBLIC void | rtp_session_send_rtcp_APP (RtpSession *session, uint8_t subtype, const char *name, const uint8_t *data, int datalen)
ORTP_PUBLIC uint32_t | rtp_session_get_current_send_ts (RtpSession *session)
ORTP_PUBLIC uint32_t | rtp_session_get_current_recv_ts (RtpSession *session)
ORTP_PUBLIC void | rtp_session_flush_sockets (RtpSession *session)
ORTP_PUBLIC void | rtp_session_release_sockets (RtpSession *session)
ORTP_PUBLIC void | rtp_session_resync (RtpSession *session)
ORTP_PUBLIC void | rtp_session_reset (RtpSession *session)
ORTP_PUBLIC void | rtp_session_destroy (RtpSession *session)
ORTP_PUBLIC const rtp_stats_t * | rtp_session_get_stats (const RtpSession *session)
ORTP_PUBLIC const jitter_stats_t * | rtp_session_get_jitter_stats (const RtpSession *session)
ORTP_PUBLIC void | rtp_session_reset_stats (RtpSession *session)
ORTP_PUBLIC void | rtp_session_set_data (RtpSession *session, void *data)
ORTP_PUBLIC void * | rtp_session_get_data (const RtpSession *session)
ORTP_PUBLIC void | rtp_session_set_recv_buf_size (RtpSession *session, int bufsize)
ORTP_PUBLIC void | rtp_session_set_rtp_socket_send_buffer_size (RtpSession *session, unsigned int size)
ORTP_PUBLIC void | rtp_session_set_rtp_socket_recv_buffer_size (RtpSession *session, unsigned int size)
ORTP_PUBLIC uint32_t | rtp_session_ts_to_time (RtpSession *session, uint32_t timestamp)
ORTP_PUBLIC uint32_t | rtp_session_time_to_ts (RtpSession *session, int millisecs)
ORTP_PUBLIC void | rtp_session_make_time_distorsion (RtpSession *session, int milisec)
ORTP_PUBLIC void | rtp_session_set_source_description (RtpSession *session, const char *cname, const char *name, const char *email, const char *phone, const char *loc, const char *tool, const char *note)
ORTP_PUBLIC void | rtp_session_add_contributing_source (RtpSession *session, uint32_t csrc, const char *cname, const char *name, const char *email, const char *phone, const char *loc, const char *tool, const char *note)
ORTP_PUBLIC void | rtp_session_remove_contributing_source (RtpSession *session, uint32_t csrc)
ORTP_PUBLIC mblk_t * | rtp_session_create_rtcp_sdes_packet (RtpSession *session, bool_t full)
ORTP_PUBLIC void | rtp_session_get_last_recv_time (RtpSession *session, struct timeval *tv)
ORTP_PUBLIC int | rtp_session_bye (RtpSession *session, const char *reason)
ORTP_PUBLIC int | rtp_session_get_last_send_error_code (RtpSession *session)
ORTP_PUBLIC void | rtp_session_clear_send_error_code (RtpSession *session)
ORTP_PUBLIC int | rtp_session_get_last_recv_error_code (RtpSession *session)
ORTP_PUBLIC void | rtp_session_clear_recv_error_code (RtpSession *session)
ORTP_PUBLIC float | rtp_session_get_round_trip_propagation (RtpSession *session)
ORTP_PUBLIC void | rtp_session_enable_network_simulation (RtpSession *session, const OrtpNetworkSimulatorParams *params)
ORTP_PUBLIC void | rtp_session_rtcp_set_lost_packet_value (RtpSession *session, const int64_t value)
| For test purpose only, sets a constant lost packet value within all RTCP output packets. . More...
ORTP_PUBLIC void | rtp_session_rtcp_set_jitter_value (RtpSession *session, const unsigned int value)
| For test purpose only, sets a constant interarrival_jitter value within all RTCP output packets. . More...
ORTP_PUBLIC void | rtp_session_rtcp_set_delay_value (RtpSession *session, const unsigned int value)
| For test purpose only, simulates a constant RTT (Round Trip Time) value by setting the LSR field within all returned RTCP output packets. . More...
ORTP_PUBLIC mblk_t * | rtp_session_pick_with_cseq (RtpSession *session, const uint16_t sequence_number)
ORTP_PUBLIC void | rtp_session_send_rtcp_xr_rcvr_rtt (RtpSession *session)
ORTP_PUBLIC void | rtp_session_send_rtcp_xr_dlrr (RtpSession *session)
ORTP_PUBLIC void | rtp_session_send_rtcp_xr_stat_summary (RtpSession *session)
ORTP_PUBLIC void | rtp_session_send_rtcp_xr_voip_metrics (RtpSession *session)
ORTP_PUBLIC bool_t | rtp_session_avpf_enabled (RtpSession *session)
ORTP_PUBLIC bool_t | rtp_session_avpf_payload_type_feature_enabled (RtpSession *session, unsigned char feature)
ORTP_PUBLIC bool_t | rtp_session_avpf_feature_enabled (RtpSession *session, unsigned char feature)
ORTP_PUBLIC void | rtp_session_enable_avpf_feature (RtpSession *session, unsigned char feature, bool_t enable)
ORTP_PUBLIC uint16_t | rtp_session_get_avpf_rr_interval (RtpSession *session)
ORTP_PUBLIC bool_t | rtp_session_rtcp_psfb_scheduled (RtpSession *session, rtcp_psfb_type_t type)
ORTP_PUBLIC bool_t | rtp_session_rtcp_rtpfb_scheduled (RtpSession *session, rtcp_rtpfb_type_t type)
ORTP_PUBLIC void | rtp_session_send_rtcp_fb_pli (RtpSession *session)
ORTP_PUBLIC void | rtp_session_send_rtcp_fb_fir (RtpSession *session)
ORTP_PUBLIC void | rtp_session_send_rtcp_fb_sli (RtpSession *session, uint16_t first, uint16_t number, uint8_t picture_id)
ORTP_PUBLIC void | rtp_session_send_rtcp_fb_rpsi (RtpSession *session, uint8_t *bit_string, uint16_t bit_string_len)
ORTP_PUBLIC void | rtp_session_send_rtcp_fb_tmmbr (RtpSession *session, uint64_t mxtbr)
ORTP_PUBLIC void | rtp_session_send_rtcp_fb_tmmbn (RtpSession *session)
ORTP_PUBLIC void | rtp_session_init (RtpSession *session, int mode)
ORTP_PUBLIC void | rtp_session_uninit (RtpSession *session)
ORTP_PUBLIC void | rtp_session_dispatch_event (RtpSession *session, OrtpEvent *ev)
ORTP_PUBLIC void | rtp_session_set_reuseaddr (RtpSession *session, bool_t yes)
ORTP_PUBLIC int | meta_rtp_transport_modifier_inject_packet (const RtpTransport *t, RtpTransportModifier *tpm, mblk_t *msg, int flags)
ORTP_PUBLIC int | meta_rtp_transport_modifier_inject_packet_to (const RtpTransport *t, RtpTransportModifier *tpm, mblk_t *msg, int flags, const struct sockaddr *to, socklen_t tolen)
ORTP_PUBLIC RtpTransport * | meta_rtp_transport_get_endpoint (const RtpTransport *transport)
ORTP_PUBLIC void | meta_rtp_transport_set_endpoint (RtpTransport *transport, RtpTransport *endpoint)
ORTP_PUBLIC void | meta_rtp_transport_destroy (RtpTransport *tp)
ORTP_PUBLIC void | meta_rtp_transport_append_modifier (RtpTransport *tp, RtpTransportModifier *tpm)

## Detailed Description

The RtpSession api.

The RtpSession objects represent a RTP session: once it is configured with local and remote network addresses and a payload type is given, it let you send and recv a media stream.

## Typedef Documentation

typedef struct _JBParameters JBParameters

Jitter buffer parameters

typedef struct _OrtpNetworkSimulatorParams OrtpNetworkSimulatorParams

Structure describing the network simulator parameters

## Enumeration Type Documentation

enum _OrtpNetworkSimulatorMode

Enumerator
OrtpNetworkSimulatorInbound | simulation is applied when receiving packets
OrtpNetworkSimulatorOutbound | simulation is applied to sent packets
OrtpNetworkSimulatorOutboundControlled | simulation is applied to sent packets according to sent timestamp set in the timestamp field of mblk_t, which is definied only with -DORTP_TIMESTAMP

## Function Documentation

ORTP_PUBLIC RtpTransport* meta_rtp_transport_get_endpoint | ( | const RtpTransport * | transport | ) |

get endpoint if any

Parameters

  [in] | t | #RtpTransport object.

Returns
  #rtpEndpoint

ORTP_PUBLIC int meta_rtp_transport_modifier_inject_packet | ( | const RtpTransport * | t,
|  | RtpTransportModifier * | tpm,
|  | mblk_t * | msg,
|  | int | flags
| ) |  |

allow a modifier to inject a packet wich will be treated by successive modifiers

References meta_rtp_transport_modifier_inject_packet_to().

ORTP_PUBLIC int meta_rtp_transport_modifier_inject_packet_to | ( | const RtpTransport * | t,
|  | RtpTransportModifier * | tpm,
|  | mblk_t * | msg,
|  | int | flags,
|  | const struct sockaddr * | to,
|  | socklen_t | tolen
| ) |  |

#RtpTransport object which can handle multiples security protocols. You can for instance use this object to use both sRTP and tunnel transporter. #mblk_t messages received and sent from the endpoint will pass through the list of modifiers given. First modifier in list will be first to modify the message in send mode and last in receive mode.

Parameters

  [in] | t | #RtpTransport object that will be generated.
  [in] | is_rtp | Whether this object will be used for RTP packets or not.
  [in] | endpoint | #RtpTransport object in charge of sending/receiving packets. If NULL, it will use standards sendto and recvfrom functions.
  [in] | modifiers_count | number of #RtpModifier object given in the variadic list. Must be 0 if none are given.

Returns
  0 if successful, -1 otherwise

allow a modifier to inject a packet wich will be treated by successive modifiers

Referenced by meta_rtp_transport_modifier_inject_packet().

ORTP_PUBLIC void meta_rtp_transport_set_endpoint | ( | RtpTransport * | transport,
|  | RtpTransport * | endpoint
| ) |  |

set endpoint

Parameters

  [in] | t | #RtpTransport object.
  [in] | t | #RtpEndpoint.

ORTP_PUBLIC int rtp_session_add_aux_remote_addr_full | ( | RtpSession * | session,
|  | const char * | rtp_addr,
|  | int | rtp_port,
|  | const char * | rtcp_addr,
|  | int | rtcp_port
| ) |  |

rtp_session_add_remote_aux_addr_full: : a rtp session freshly created. : a local IP address in the xxx.xxx.xxx.xxx form. : a local rtp port. : a local IP address in the xxx.xxx.xxx.xxx form. : a local rtcp port.

        Add an auxiliary remote address for the rtp session, ie a destination address where rtp packet
        are sent.

        Returns: 0 on success.

ORTP_PUBLIC int rtp_session_bye | ( | RtpSession * | session,
|  | const char * | reason
| ) |  |

Sends a RTCP bye packet.

Parameters

  session | RtpSession
  reason | the reason phrase.

ORTP_PUBLIC mblk_t* rtp_session_create_packet | ( | RtpSession * | session,
|  | int | header_size,
|  | const uint8_t * | payload,
|  | int | payload_size
| ) |  |

Allocates a new rtp packet. In the header, ssrc and payload_type according to the session's context. Timestamp is not set, it will be set when the packet is going to be sent with rtp_session_sendm_with_ts(). Sequence number is initalized to previous sequence number sent + 1 If payload_size is zero, thus an empty packet (just a RTP header) is returned.

Parameters

  session | a rtp session.
  header_size | the rtp header size. For standart size (without extensions), it is RTP_FIXED_HEADER_SIZE
  payload | data to be copied into the rtp packet.
  payload_size | size of data carried by the rtp packet.

Returns
  a rtp packet in a mblk_t (message block) structure.

Referenced by rtp_session_send_with_ts().

ORTP_PUBLIC mblk_t* rtp_session_create_packet_in_place | ( | RtpSession * | session,
|  | uint8_t * | buffer,
|  | int | size,
|  | void(*)(void *) | freefn
| ) |  |

Creates a new rtp packet using the buffer given in arguments (no copy). In the header, ssrc and payload_type according to the session's context. Timestamp and seq number are not set, there will be set when the packet is going to be sent with rtp_session_sendm_with_ts(). can be NULL, in that case payload will be kept untouched.

Parameters

  session | a rtp session.
  buffer | a buffer that contains first just enough place to write a RTP header, then the data to send.
  size | the size of the buffer
  freefn | a function that will be called once the buffer is no more needed (the data has been sent).

Returns
  a rtp packet in a mblk_t (message block) structure.

ORTP_PUBLIC mblk_t* rtp_session_create_packet_raw | ( | const uint8_t * | packet,
|  | int | packet_size
| ) |  |

Create a packet already including headers

ORTP_PUBLIC mblk_t* rtp_session_create_packet_with_data | ( | RtpSession * | session,
|  | uint8_t * | payload,
|  | int | payload_size,
|  | void(*)(void *) | freefn
| ) |  |

Creates a new rtp packet using the given payload buffer (no copy). The header will be allocated separetely. In the header, ssrc and payload_type according to the session's context. Timestamp and seq number are not set, there will be set when the packet is going to be sent with rtp_session_sendm_with_ts(). oRTP will send this packet using libc's sendmsg() (if this function is availlable!) so that there will be no packet concatenation involving copies to be done in user-space. can be NULL, in that case payload will be kept untouched.

Parameters

  session | a rtp session.
  payload | the data to be sent with this packet
  payload_size | size of data
  freefn | a function that will be called when the payload buffer is no more needed.

Returns
  : a rtp packet in a mblk_t (message block) structure.

Referenced by rtp_session_send_with_ts().

ORTP_PUBLIC void rtp_session_destroy | ( | RtpSession * | session | ) |

Destroys a rtp session. All memory allocated for the RtpSession is freed.

Parameters

  session | a rtp session.

ORTP_PUBLIC void rtp_session_enable_rtcp | ( | RtpSession * | session,
|  | bool_t | yesno
| ) |  |

By default oRTP automatically sends RTCP SR or RR packets. If yesno is set to FALSE, the RTCP sending of packet is disabled. This functionnality might be needed for some equipments that do not support RTCP, leading to a traffic of ICMP errors on the network. It can also be used to save bandwidth despite the RTCP bandwidth is actually and usually very very low.

ORTP_PUBLIC void rtp_session_flush_sockets | ( | RtpSession * | session | ) |

rtp_session_flush_sockets: : a rtp session

Flushes the sockets for all pending incoming packets. This can be usefull if you did not listen to the stream for a while and wishes to start to receive again. During the time no receive is made packets get bufferised into the internal kernel socket structure.

ORTP_PUBLIC int rtp_session_get_cum_loss | ( | RtpSession * | session | ) |

Returns the latest cumulative loss value computed

ORTP_PUBLIC uint32_t rtp_session_get_current_recv_ts | ( | RtpSession * | session | ) |

Same thing as rtp_session_get_current_send_ts() except that it's for an incoming stream. Works only on scheduled mode.

Parameters

  session | a rtp session.

Returns
  the theoritical that would have to be receive now.

References _PayloadType::clock_rate.

ORTP_PUBLIC uint32_t rtp_session_get_current_send_ts | ( | RtpSession * | session | ) |

When the rtp session is scheduled and has started to send packets, this function computes the timestamp that matches to the present time. Using this function can be usefull when sending discontinuous streams. Some time can be elapsed between the end of a stream burst and the begin of a new stream burst, and the application may be not not aware of this elapsed time. In order to get a valid (current) timestamp to pass to rtp_session_send_with_ts() or rtp_session_sendm_with_ts(), the application may use rtp_session_get_current_send_ts().

Parameters

  session | a rtp session.

Returns
  the current send timestamp for the rtp session.

References _PayloadType::clock_rate.

ORTP_PUBLIC void* rtp_session_get_data | ( | const RtpSession * | session | ) |

Parameters

  session | a rtp session

Returns
  the void pointer previously set using rtp_session_set_data()

ORTP_PUBLIC int rtp_session_get_dscp | ( | const RtpSession * | session | ) |

rtp_session_get_dscp: : a rtp session

Returns the DSCP (Differentiated Services Code Point) for outgoing RTP packets.

ORTP_PUBLIC const jitter_stats_t* rtp_session_get_jitter_stats | ( | const RtpSession * | session | ) |

Retrieves the session's jitter specific statistics.

ORTP_PUBLIC void rtp_session_get_last_recv_time | ( | RtpSession * | session,
|  | struct timeval * | tv
| ) |  |

Gets last time a valid RTP or RTCP packet was received.

Parameters

  session | RtpSession to get last receive time from.
  tv | Pointer to struct timeval to fill.

ORTP_PUBLIC int rtp_session_get_local_port | ( | const RtpSession * | session | ) |

rtp_session_get_local_port: : a rtp session for which rtp_session_set_local_addr() or rtp_session_set_remote_addr() has been called

        This function can be useful to retrieve the local port that was randomly choosen by
        rtp_session_set_remote_addr() when rtp_session_set_local_addr() was not called.

        Returns: the local port used to listen for rtp packets, -1 if not set.

ORTP_PUBLIC int rtp_session_get_multicast_loopback | ( | RtpSession * | session | ) |

rtp_session_get_multicast_loopback: : a rtp session

Returns the multicast loopback state of rtp session (true or false).

ORTP_PUBLIC int rtp_session_get_multicast_ttl | ( | RtpSession * | session | ) |

rtp_session_get_multicast_ttl: : a rtp session

Returns the TTL (Time-To-Live) for outgoing multicast packets.

ORTP_PUBLIC RtpProfile* rtp_session_get_profile | ( | RtpSession * | session | ) |

Parameters

  session | a rtp session
          DEPRECATED! Returns current send profile.
          Use rtp_session_get_send_profile() or rtp_session_get_recv_profile()

ORTP_PUBLIC uint32_t rtp_session_get_rcv_ext_seq_number | ( | RtpSession * | session | ) |

Returns the highest extended sequence number received.

ORTP_PUBLIC float rtp_session_get_recv_bandwidth | ( | RtpSession * | session | ) |

Get last computed recv bandwidth. Computation must have been done with rtp_session_compute_recv_bandwidth()

ORTP_PUBLIC int rtp_session_get_recv_payload_type | ( | const RtpSession * | session | ) |

Parameters

  session | a rtp session

Returns
  the payload type currently used in incoming rtp packets

Referenced by rtp_session_resync().

ORTP_PUBLIC RtpProfile* rtp_session_get_recv_profile | ( | RtpSession * | session | ) |

Parameters

  session | a rtp session
          Returns current receive profile.

ORTP_PUBLIC uint32_t rtp_session_get_recv_ssrc | ( | RtpSession * | session | ) |

Get the SSRC for the incoming stream.

If no packets have been received yet, 0 is returned.

ORTP_PUBLIC float rtp_session_get_round_trip_propagation | ( | RtpSession * | session | ) |

Returns the last known round trip propagation delay.

This value is known after successful RTCP SR or RR exchanged between a sender and a receiver. oRTP automatically takes care of sending SR or RR packets. You might want to call this function when you receive an RTCP event (see rtp_session_register_event_queue() ). This value might not be known: at the beginning when no RTCP packets have been exchanged yet, or simply because the rtcp channel is broken due to firewall problematics, or because the remote implementation does not support RTCP.

Returns
  the round trip propagation time in seconds if known, -1 if unknown.

ORTP_PUBLIC float rtp_session_get_send_bandwidth | ( | RtpSession * | session | ) |

Get last computed send bandwidth. Computation must have been done with rtp_session_compute_send_bandwidth()

ORTP_PUBLIC int rtp_session_get_send_payload_type | ( | const RtpSession * | session | ) |

Parameters

  session | a rtp session

Returns
  the payload type currently used in outgoing rtp packets

Referenced by rtp_session_create_telephone_event_packet().

ORTP_PUBLIC RtpProfile* rtp_session_get_send_profile | ( | RtpSession * | session | ) |

Parameters

  session | a rtp session
          Returns current send profile.

ORTP_PUBLIC uint32_t rtp_session_get_send_ssrc | ( | RtpSession * | session | ) |

Get the SSRC for the outgoing stream.

Parameters

  session | a rtp session.

ORTP_PUBLIC uint16_t rtp_session_get_seq_number | ( | RtpSession * | session | ) |

Get the current sequence number for outgoing stream.

ORTP_PUBLIC const rtp_stats_t* rtp_session_get_stats | ( | const RtpSession * | session | ) |

Retrieve the session's statistics.

ORTP_PUBLIC RtpSession* rtp_session_new | ( | int | mode | ) |

Creates a new rtp session. If the session is able to send data (RTP_SESSION_SENDONLY or RTP_SESSION_SENDRECV), then a random SSRC number is choosed for the outgoing stream.

Parameters

  mode | One of the RtpSessionMode flags.

Returns
  the newly created rtp session.

ORTP_PUBLIC mblk_t* rtp_session_pick_with_cseq | ( | RtpSession * | session,
|  | const uint16_t | sequence_number
| ) |  |

Try to get an rtp packet presented as a mblk_t structure from the rtp session at a given sequence number. This function is very usefull for codec with Forward error correction capabilities

This function returns the entire packet (with header).

- Parameters

    session | a rtp session.
    sequence_number | a sequence number.

  Returns
    a rtp packet presented as a mblk_t, or NULL if not found.

ORTP_PUBLIC int rtp_session_recv_with_ts | ( | RtpSession * | session,
|  | uint8_t * | buffer,
|  | int | len,
|  | uint32_t | ts,
|  | int * | have_more
| ) |  |

NOTE: use of this function is discouraged when sending payloads other than pcm/pcmu/pcma/adpcm types. rtp_session_recvm_with_ts() does better job.

Tries to read the bytes of the incoming rtp stream related to timestamp ts. In case where the user supplied buffer is not large enough to get all the data related to timestamp ts, then *( have_more) is set to 1 to indicate that the application should recall the function with the same timestamp to get more data.

When the rtp session is scheduled (see rtp_session_set_scheduling_mode() ), and the blocking mode is on (see rtp_session_set_blocking_mode() ), then the calling thread is suspended until the timestamp given as argument expires, whatever a received packet fits the query or not.

Important note: it is clear that the application cannot know the timestamp of the first packet of the incoming stream, because it can be random. The timestamp given to the function is used relatively to first timestamp of the stream. In simple words, 0 is a good value to start calling this function.

This function internally calls rtp_session_recvm_with_ts() to get a rtp packet. The content of this packet is then copied into the user supplied buffer in an intelligent manner: the function takes care of the size of the supplied buffer and the timestamp given in argument. Using this function it is possible to read continous audio data (e.g. pcma,pcmu...) with for example a standart buffer of size of 160 with timestamp incrementing by 160 while the incoming stream has a different packet size.

Returns: if a packet was availlable with the corresponding timestamp supplied in argument then the number of bytes written in the user supplied buffer is returned. If no packets are availlable, either because the sender has not started to send the stream, or either because silence packet are not transmitted, or either because the packet was lost during network transport, then the function returns zero.

Parameters

  session | a rtp session.
  buffer | a user supplied buffer to write the data.
  len | the length in bytes of the user supplied buffer.
  ts | the timestamp wanted.
  have_more | the address of an integer to indicate if more data is availlable for the given timestamp.

References rtp_session_recvm_with_ts().

ORTP_PUBLIC mblk_t* rtp_session_recvm_with_ts | ( | RtpSession * | session,
|  | uint32_t | user_ts
| ) |  |

Try to get a rtp packet presented as a mblk_t structure from the rtp session. The parameter is relative to the first timestamp of the incoming stream. In other words, the application does not have to know the first timestamp of the stream, it can simply call for the first time this function with =0, and then incrementing it as it want. The RtpSession takes care of synchronisation between the stream timestamp and the user timestamp given here.

This function returns the entire packet (with header).

The behaviour of this function has changed since version 0.15.0. Previously the payload data could be accessed using mblk_t::b_cont::b_rptr field of the returned mblk_t. This is no more the case. The convenient way of accessing the payload data is to use rtp_get_payload() :

1 unsigned char *payload;
2 int payload_size;
3 payload_size=rtp_get_payload(mp,&payload);

OR simply skip the header this way, the data is then comprised between mp->b_rptr and mp->b_wptr:

1 rtp_get_payload(mp,&mp->b_rptr);

Parameters

  session | a rtp session.
  user_ts | a timestamp.

Returns
  a rtp packet presented as a mblk_t.

References session_set_clr, and session_set_set.

Referenced by rtp_session_recv_with_ts().

ORTP_PUBLIC void rtp_session_register_event_queue | ( | RtpSession * | session,
|  | OrtpEvQueue * | q
| ) |  |

Register an event queue. An application can use an event queue to get informed about various RTP events.

ORTP_PUBLIC void rtp_session_release_sockets | ( | RtpSession * | session | ) |

Closes the rtp and rtcp sockets.

References _RtpTransport::t_destroy.

Referenced by rtp_session_set_local_addr().

ORTP_PUBLIC void rtp_session_reset | ( | RtpSession * | session | ) |

Reset the session: local and remote addresses are kept. It resets timestamp, sequence number, and calls rtp_session_resync().

Parameters

  session | a rtp session.

References rtp_session_resync().

ORTP_PUBLIC void rtp_session_resync | ( | RtpSession * | session | ) |

Resynchronize to the incoming RTP streams. This can be useful to handle discontinuous timestamps. For example, call this function from the timestamp_jump signal handler.

Parameters

  session | the rtp session

References rtp_session_get_recv_payload_type().

Referenced by rtp_session_reset().

ORTP_PUBLIC void rtp_session_rtcp_set_delay_value | ( | struct _RtpSession * | s,
|  | const unsigned int | value
| ) |  |

For test purpose only, simulates a constant RTT (Round Trip Time) value by setting the LSR field within all returned RTCP output packets.
.

The RTT processing involves two RTCP packets exchanged between two different devices.
In a normal operation the device 1 issues a SR packets at time T0, hence this packet has a timestamp field set to T0. The LSR and DLSR fiels of that packet are not considered here. This packet is received by the Device 2 at T1. In response, the Device 2 issues another SR or RR packets at T2 with the following fields;

- a timestamp set to T2.
- a LSR (Last SR packet timestamp) field set to T0 ( this value has been extracted from the first packet).
- a DLSR (Delay since Last SR packet) field set to (T2 - T1).

This packet is received by The Device 1 at T3. So the Device 1 is now able to process the RTT using the formula : RTT = T3 - LSR - DLSR = (T1 - T0) - (T3 - T2).
This way of processing is described in par. 6.4 of the RFC3550 standard.

In the test mode that is enabled by this procedure, the RTCP stack is considered as beeing part of the device 2. For setting the RTT to a constant RTT0 value, the Device 2 artificially sets the LSR field of the second packet to (T1 - RTT0), instead of T0 in normal mode. The two other fields (timestamp and DLSR) are set as in the normal mode. So the Device 1 will process : RTT = T3 - LSR - DLSR = RTT0 + (T3 - T2) that is near to RTT0 is T3 - T2 is small enough.

Note
  It is impossible to actually make the mesured RTT strictly equal to RTT0, as the packet trip time (T3 - T2) is unknown when this packet is issued by the Device 2.

Parameters

  s | : the rtp session.
  value | : The desired RTT test vector value (RTT0).

ORTP_PUBLIC void rtp_session_rtcp_set_jitter_value | ( | struct _RtpSession * | s,
|  | const unsigned int | value
| ) |  |

For test purpose only, sets a constant interarrival_jitter value within all RTCP output packets.
.

The SR or RR RTCP packet contain an interarrival jitter field. After this procedure is called, the interarrival jitter field will be set to a constant value in all output SR or RR packets. This parameter will overridden the actual interarrival jitter value that was processed by the RTCP stack.

Parameters

  s | : the rtp session.
  value | : the interarrival jitter test vector value.

ORTP_PUBLIC void rtp_session_rtcp_set_lost_packet_value | ( | struct _RtpSession * | s,
|  | const int64_t | value
| ) |  |

For test purpose only, sets a constant lost packet value within all RTCP output packets.
.

The SR or RR RTCP packet contain a lost packet field. After this procedure is called, the lost packet field will be set to a constant value in all output SR or RR packets. This parameter will overridden the actual number of lost packets in the input RTP stream that the RTCP stack had previously processed.

Parameters

  s | : the rtp session.
  value | : the lost packets test vector value.

ORTP_PUBLIC int rtp_session_send_with_ts | ( | RtpSession * | session,
|  | const uint8_t * | buffer,
|  | int | len,
|  | uint32_t | userts
| ) |  |

Send a rtp datagram to the destination set by rtp_session_set_remote_addr() containing the data from with timestamp . This is a high level function that uses rtp_session_create_packet() and rtp_session_sendm_with_ts() to send the data.

Parameters

  session | a rtp session.
  buffer | a buffer containing the data to be sent in a rtp packet.
  len | the length of the data buffer, in bytes.
  userts | the timestamp of the data to be sent. Refer to the rfc to know what it is.
  return | the number of bytes sent over the network.

References rtp_session_create_packet(), rtp_session_create_packet_with_data(), and rtp_session_sendm_with_ts().

ORTP_PUBLIC int rtp_session_sendm_with_ts | ( | RtpSession * | session,
|  | mblk_t * | packet,
|  | uint32_t | timestamp
| ) |  |

Send the rtp datagram to the destination set by rtp_session_set_remote_addr() with timestamp . For audio data, the timestamp is the number of the first sample resulting of the data transmitted. See rfc1889 for details. The packet () is freed once it is sended.

Parameters

  session | a rtp session.
  mp | a rtp packet presented as a mblk_t.
  timestamp | the timestamp of the data to be sent.

Returns
  the number of bytes sent over the network.

Referenced by rtp_session_send_dtmf2(), and rtp_session_send_with_ts().

ORTP_PUBLIC void rtp_session_set_blocking_mode | ( | RtpSession * | session,
|  | int | yesno
| ) |  |

This function implicitely enables the scheduling mode if yesno is TRUE. rtp_session_set_blocking_mode() defines the behaviour of the rtp_session_recv_with_ts() and rtp_session_send_with_ts() functions. If is TRUE, rtp_session_recv_with_ts() will block until it is time for the packet to be received, according to the timestamp passed to the function. After this time, the function returns. For rtp_session_send_with_ts(), it will block until it is time for the packet to be sent. If is FALSE, then the two functions will return immediately.

Parameters

  session | a rtp session
  yesno | a boolean

References rtp_session_set_scheduling_mode().

ORTP_PUBLIC void rtp_session_set_connected_mode | ( | RtpSession * | session,
|  | bool_t | yesno
| ) |  |

If yesno is TRUE, thus a connect() syscall is done on the socket to the destination address set by rtp_session_set_remote_addr(), or if the session does symmetric rtp (see rtp_session_set_symmetric_rtp()) a the connect() is done to the source address of the first packet received. Connecting a socket has effect of rejecting all incoming packets that don't come from the address specified in connect(). It also makes ICMP errors (such as connection refused) available to the application.

Parameters

  session | a rtp session
  yesno | a boolean to enable or disable the feature

ORTP_PUBLIC void rtp_session_set_data | ( | RtpSession * | session,
|  | void * | data
| ) |  |

Stores some application specific data into the session, so that it is easy to retrieve it from the signal callbacks using rtp_session_get_data().

Parameters

  session | a rtp session
  data | an opaque pointer to be stored in the session

ORTP_PUBLIC int rtp_session_set_dscp | ( | RtpSession * | session,
|  | int | dscp
| ) |  |

rtp_session_set_dscp: : a rtp session : desired DSCP PHB value

Sets the DSCP (Differentiated Services Code Point) for outgoing RTP packets.

Returns: 0 on success.

Referenced by rtp_session_set_local_addr().

ORTP_PUBLIC void rtp_session_set_jitter_compensation | ( | RtpSession * | session,
|  | int | milisec
| ) |  |

rtp_session_set_jitter_compensation: : a RtpSession : the time interval in milisec to be jitter compensed.

Sets the time interval for which packet are buffered instead of being delivered to the application.

ORTP_PUBLIC int rtp_session_set_local_addr | ( | RtpSession * | session,
|  | const char * | addr,
|  | int | rtp_port,
|  | int | rtcp_port
| ) |  |

rtp_session_set_local_addr: : a rtp session freshly created. : a local IP address in the xxx.xxx.xxx.xxx form. : a local port or -1 to let oRTP choose the port randomly : a local port or -1 to let oRTP choose the port randomly

        Specify the local addr to be use to listen for rtp packets or to send rtp packet from.
        In case where the rtp session is send-only, then it is not required to call this function:
        when calling rtp_session_set_remote_addr(), if no local address has been set, then the
        default INADRR_ANY (0.0.0.0) IP address with a random port will be used. Calling
        rtp_sesession_set_local_addr() is mandatory when the session is recv-only or duplex.

        Returns: 0 on success.

References rtp_session_release_sockets(), rtp_session_set_dscp(), rtp_session_set_multicast_loopback(), and rtp_session_set_multicast_ttl().

ORTP_PUBLIC int rtp_session_set_multicast_loopback | ( | RtpSession * | session,
|  | int | yesno
| ) |  |

rtp_session_set_multicast_loopback: : a rtp session : desired Multicast Time-To-Live

Sets the TTL (Time-To-Live) for outgoing multicast packets.

Returns: 0 on success.

Referenced by rtp_session_set_local_addr().

ORTP_PUBLIC int rtp_session_set_multicast_ttl | ( | RtpSession * | session,
|  | int | ttl
| ) |  |

rtp_session_set_multicast_ttl: : a rtp session : desired Multicast Time-To-Live

Sets the TTL (Time-To-Live) for outgoing multicast packets.

Returns: 0 on success.

Referenced by rtp_session_set_local_addr().

ORTP_PUBLIC int rtp_session_set_payload_type | ( | RtpSession * | session,
|  | int | pt
| ) |  |

Sets the expected payload type for incoming packets and payload type to be used for outgoing packets. If the actual payload type in incoming packets is different that this expected payload type, thus the "payload_type_changed" signal is emitted.

Parameters

  session | a rtp session
  paytype | the payload type number

Returns
  0 on success, -1 if the payload is not defined.

References rtp_session_set_recv_payload_type(), and rtp_session_set_send_payload_type().

ORTP_PUBLIC int rtp_session_set_pktinfo | ( | RtpSession * | session,
|  | int | activate
| ) |  |

rtp_session_set_pktinfo: : a rtp session : activation flag (0 to deactivate, other value to activate)

(De)activates packet info for incoming and outgoing packets.

Returns: 0 on success.

ORTP_PUBLIC void rtp_session_set_profile | ( | RtpSession * | session,
|  | RtpProfile * | profile
| ) |  |

Set the RTP profile to be used for the session. By default, all session are created by rtp_session_new() are initialized with the AV profile, as defined in RFC 3551. The application can set any other profile instead using that function.

Parameters

  session | a rtp session
  profile | a rtp profile

References rtp_session_telephone_events_supported().

ORTP_PUBLIC void rtp_session_set_recv_buf_size | ( | RtpSession * | session,
|  | int | bufsize
| ) |  |

The default value is UDP_MAX_SIZE bytes, a value which is working for mostly everyone. However if your application can make assumption on the sizes of received packet, it can be interesting to set it to a lower value in order to save memory.

Parameters

  session | a rtp session
  bufsize | max size in bytes for receiving packets

ORTP_PUBLIC int rtp_session_set_recv_payload_type | ( | RtpSession * | session,
|  | int | paytype
| ) |  |

Sets the expected payload type for incoming packets. If the actual payload type in incoming packets is different that this expected payload type, thus the "payload_type_changed" signal is emitted.

Parameters

  session | a rtp session
  paytype | the payload type number

Returns
  0 on success, -1 if the payload is not defined.

Referenced by rtp_session_set_payload_type().

ORTP_PUBLIC void rtp_session_set_recv_profile | ( | RtpSession * | session,
|  | RtpProfile * | profile
| ) |  |

Set the RTP profile to be used for the receiveing by this session. By default, all session are created by rtp_session_new() are initialized with the AV profile, as defined in RFC 3551. The application can set any other profile instead using that function.

Parameters

  session | a rtp session
  profile | a rtp profile

References rtp_session_recv_telephone_events_supported().

ORTP_PUBLIC int rtp_session_set_remote_addr | ( | RtpSession * | session,
|  | const char * | addr,
|  | int | port
| ) |  |

rtp_session_set_remote_addr: : a rtp session freshly created. : a local IP address in the xxx.xxx.xxx.xxx form. : a local port.

        Sets the remote address of the rtp session, ie the destination address where rtp packet
        are sent. If the session is recv-only or duplex, it also sets the origin of incoming RTP
        packets. Rtp packets that don't come from addr:port are discarded.

        Returns: 0 on success.

References rtp_session_set_remote_addr_full().

ORTP_PUBLIC int rtp_session_set_remote_addr_full | ( | RtpSession * | session,
|  | const char * | rtp_addr,
|  | int | rtp_port,
|  | const char * | rtcp_addr,
|  | int | rtcp_port
| ) |  |

rtp_session_set_remote_addr_full: : a rtp session freshly created. : a local IP address in the xxx.xxx.xxx.xxx form. : a local rtp port. : a local IP address in the xxx.xxx.xxx.xxx form. : a local rtcp port.

        Sets the remote address of the rtp session, ie the destination address where rtp packet
        are sent. If the session is recv-only or duplex, it also sets the origin of incoming RTP
        packets. Rtp packets that don't come from addr:port are discarded.

        Returns: 0 on success.

Referenced by rtp_session_set_remote_addr().

ORTP_PUBLIC void rtp_session_set_rtcp_report_interval | ( | RtpSession * | session,
|  | int | value_ms
| ) |  |

Sets the default interval in milliseconds for RTCP reports emitted by the session

ORTP_PUBLIC void rtp_session_set_rtp_socket_recv_buffer_size | ( | RtpSession * | session,
|  | unsigned int | size
| ) |  |

Set kernel recv maximum buffer size for the rtp socket. A value of zero defaults to the operating system default.

ORTP_PUBLIC void rtp_session_set_rtp_socket_send_buffer_size | ( | RtpSession * | session,
|  | unsigned int | size
| ) |  |

Set kernel send maximum buffer size for the rtp socket. A value of zero defaults to the operating system default.

ORTP_PUBLIC void rtp_session_set_scheduling_mode | ( | RtpSession * | session,
|  | int | yesno
| ) |  |

Sets the scheduling mode of the rtp session. If is TRUE, the rtp session is in the scheduled mode, that means that you can use session_set_select() to block until it's time to receive or send on this session according to the timestamp passed to the respective functions. You can also use blocking mode (see rtp_session_set_blocking_mode() ), to simply block within the receive and send functions. If is FALSE, the ortp scheduler will not manage those sessions, meaning that blocking mode and the use of session_set_select() for this session are disabled.

Parameters

  session | a rtp session.
  yesno | a boolean to indicate the scheduling mode.

Referenced by rtp_session_set_blocking_mode().

ORTP_PUBLIC int rtp_session_set_send_payload_type | ( | RtpSession * | session,
|  | int | paytype
| ) |  |

Sets the payload type of the rtp session. It decides of the payload types written in the of the rtp header for the outgoing stream, if the session is SENDRECV or SENDONLY. For payload type in incoming packets, the application can be informed by registering for the "payload_type_changed" signal, so that it can make the necessary changes on the downstream decoder that deals with the payload of the packets.

Parameters

  session | a rtp session
  paytype | the payload type number

Returns
  0 on success, -1 if the payload is not defined.

Referenced by rtp_session_set_payload_type().

ORTP_PUBLIC void rtp_session_set_send_profile | ( | RtpSession * | session,
|  | RtpProfile * | profile
| ) |  |

Set the RTP profile to be used for the sending by this session. By default, all session are created by rtp_session_new() are initialized with the AV profile, as defined in RFC 3551. The application can set any other profile instead using that function.

Parameters

  session | a rtp session
  profile | a rtp profile

References rtp_session_send_telephone_events_supported().

ORTP_PUBLIC void rtp_session_set_seq_number | ( | RtpSession * | session,
|  | uint16_t | seq
| ) |  |

Set the initial sequence number for outgoing stream..

Parameters

  session | a rtp session freshly created.
  addr | a 16 bit unsigned number.

ORTP_PUBLIC void rtp_session_set_source_description | ( | RtpSession * | session,
|  | const char * | cname,
|  | const char * | name,
|  | const char * | email,
|  | const char * | phone,
|  | const char * | loc,
|  | const char * | tool,
|  | const char * | note
| ) |  |

Set session's SDES item for automatic sending of RTCP compound packets. If some items are not specified, use NULL.

ORTP_PUBLIC void rtp_session_set_ssrc | ( | RtpSession * | session,
|  | uint32_t | ssrc
| ) |  |

Sets the SSRC for the outgoing stream. If not done, a random ssrc is used.

Parameters

  session | a rtp session.
  ssrc | an unsigned 32bit integer representing the synchronisation source identifier (SSRC).

ORTP_PUBLIC void rtp_session_set_ssrc_changed_threshold | ( | RtpSession * | session,
|  | int | numpackets
| ) |  |

Sets the number of packets containing a new SSRC that will trigger the "ssrc_changed" callback.

ORTP_PUBLIC void rtp_session_set_symmetric_rtp | ( | RtpSession * | session,
|  | bool_t | yesno
| ) |  |

Enable or disable the "rtp symmetric" hack which consists of the following: after the first packet is received, the source address of the packet is set to be the destination address for all next packets. This is useful to pass-through firewalls.

Parameters

  session | a rtp session
  yesno | a boolean to enable or disable the feature

ORTP_PUBLIC void rtp_session_set_time_jump_limit | ( | RtpSession * | session,
|  | int | milisecs
| ) |  |

oRTP has the possibility to inform the application through a callback registered with rtp_session_signal_connect about crazy incoming RTP stream that jumps from a timestamp N to N+some_crazy_value. This lets the opportunity for the application to reset the session in order to resynchronize, or any other action like stopping the call and reporting an error.

Parameters

  session | the rtp session
  ts_step | a time interval in miliseconds

ORTP_PUBLIC int rtp_session_signal_connect | ( | RtpSession * | session,
|  | const char * | signal_name,
|  | RtpCallback | cb,
|  | void * | user_data
| ) |  |

This function provides the way for an application to be informed of various events that may occur during a rtp session. is a string identifying the event, and is a user supplied function in charge of processing it. The application can register several callbacks for the same signal, in the limit of #RTP_CALLBACK_TABLE_MAX_ENTRIES. Here are name and meaning of supported signals types:

"ssrc_changed" : the SSRC of the incoming stream has changed.

"payload_type_changed" : the payload type of the incoming stream has changed.

"telephone-event_packet" : a telephone-event rtp packet (RFC2833) is received.

"telephone-event" : a telephone event has occured. This is a high-level shortcut for "telephone-event_packet".

"network_error" : a network error happened on a socket. Arguments of the callback functions are a const char * explaining the error, an int errno error code and the user_data as usual.

"timestamp_jump" : we have received a packet with timestamp in far future compared to last timestamp received. The farness of far future is set by rtp_sesssion_set_time_jump_limit() "rtcp_bye": we have received a RTCP bye packet. Arguments of the callback functions are a const char * containing the leaving reason and the user_data.

Returns: 0 on success, -EOPNOTSUPP if the signal does not exists, -1 if no more callbacks can be assigned to the signal type.

Parameters

  session | a rtp session
  signal_name | the name of a signal
  cb | a RtpCallback
  user_data | a pointer to any data to be passed when invoking the callback.

ORTP_PUBLIC int rtp_session_signal_disconnect_by_callback | ( | RtpSession * | session,
|  | const char * | signal_name,
|  | RtpCallback | cb
| ) |  |

Removes callback function to the list of callbacks for signal .

Parameters

  session | a rtp session
  signal_name | a signal name
  cb | a callback function.

Returns
  : 0 on success, a negative value if the callback was not found.