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oRTP

oRTP. Speaker: Wei-Lin Chen Advisor: Quincy Wu Date: 2008/12/30. Outline. Overview Compile oRTP oRTP function calls Demo References. Overview. GNU Lesser General Public License (LGPL) C language Includes an API to parse incoming RTCP packets

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oRTP

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  1. oRTP Speaker: Wei-Lin Chen Advisor: Quincy Wu Date: 2008/12/30

  2. Outline • Overview • Compile oRTP • oRTP function calls • Demo • References

  3. Overview • GNU Lesser General Public License (LGPL) • C language • Includes an API to parse incoming RTCP packets • Support for multiples profiles, AV profile being the one by default • A packet scheduler for to send and recv packet "on time", according to their timestamp 3

  4. Compile oRTP • Download oRTP source • ortp-0.13.1 • Compile • /build/win32native/oRTP.vcproj • Library • /build/win32native/Debug/oRTP.lib 4

  5. oRTP function calls • void ortp_init () • 初始化oRTP • void ortp_exit () • 結束oRTP • rtpsession * rtp_session_new (int mode) • RTP_SESSION_RECVONLY • RTP_SESSION_SENDONLY • RTP_SESSION_SENDRECV • void rtp_session_set_ssrc(rtpsession *session, uint32 ssrc) • 32位元 SSRC

  6. oRTP function calls(cont.) • rtp_session_set_payload_type(rtpsession *session, int paytype) • 成功，則回傳0 • rtp_session_set_remote_addr(rtpsession *session,char *addr, int port) • 設定目標address跟port

  7. oRTP function calls(cont.) • rtp_session_send_with_ts(rtpsession *session, char *buffer, int len, uint32 userts) • 將buffer中的data裝入rtp發送到目標位址 • rtp_session_recv_with_ts(rtpsession *session, char *buffer, int len, uint32 userts, int *  have_more) • 將接收到的rtp放進buffer中

  8. oRTP function calls(cont.) • rtp_session_destroy (rtpsession * session) • 結束session • void ortp_global_stats_display () • 統計session

  9. Demo • rtpsend send.wav 127.0.0.1 8000 • rtprecv recv.wav 8000

  10. References • oRTP API documentation • http://www.antisip.com/doc/ortp/index.html • Po-Chou’s linphone powerpoint • http://ms11.voip.edu.tw/~webmaster/meeting/951/ppt/PoChou/20070108_PoChou_Linphone.ppt • oRTP code review • http://www.linphone.org/index.php/eng/code_review/ortp • Lesser General Public License(LGPL) • http://www.openfoundry.org/index.php?option=com_content&Itemid=252&id=519&lang=en&task=view

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