Looking for CRtpAPI code example

[payu.sergey]

Hi everybody,

Have anybody had success with CRtpAPI APIs from extension pack? Nokia said, that we should use these APIs in order to make RTP transactions.

I can create, open and initialize RTP session, but no RTP/RTCP packets in observer. Should I do something special. Nokia, hello, you leaves us with 3 headers and almost no documentation and there are only 4 links for CRtpAPI in google. Can anybody just explain how to use these APIs?

Is own RTP stack the only solution?

Payu Sergey

[payu.sergey]

Hi everybody,

Looks like I finally beat these APIs. Right now I can send/receive RTP/RTCP packets perfectly.

Thanks,
Payu Sergey

[ChuanW]

Here is the quick guide for using Nokia Rtp
1. Open RTP

iRtpApi = CRtpAPI::NewL( ..)
iRtpApi->OpenL( ..);
iRtpApi->StrartConnection( ..);

2. CreateSession
iRtpApi->CreateSessionL( .. );

if RTCP is enabled

iRtpApi->RegisterRtcpObserver( );

if non-rtp packet will be received with the same port then
iRtpApi->SetNonRTPDataObserver ( ...)

3. Set Remote address
iRtpApi->SetRemoteAddress( ..);

4. CreateStream
iRtpApi->CreateReceiveStreamL(..);
iRtpApi->CreateTransmitStreamExtL(..);

Use this function if ssrc is not specified
iRtpApi->CreateTransmitStreamL(..)

5.Start Session
To start session, there must be one stream created already.
If no receive stream created then the incoming packets will not be received
iRtpApi->StartSession( aSessionId );

6. Start Stream
iRtpApi->StartSession( aSessionId );

7. Remove Stream
CloseStreamL(..);

8. Send RTCP packet
Set session bandwidth or rtcp fraction
iRtpApi->SetRtcpParameters(..);
iRtpApi->SendRtcpByePacket( .. );
iRtpApi->SendRtcpAppPacket( .. );
iRtpApi->SendRtcpSrPacket( .. );
iRtpApi->SendRtcpRrPacket( .. );

9 Suspend RTCP
iRtpApi->SuspendRtcpSending( .. )

10 Resum RTCP
With autoSending parameter as ETrue.
iRtpApi->SuspendRtcpSending(..)

11. GetRTCP status
iRtpApi->IsRtcpSendingSuspended( .. );

12. Send NonRtpData
some data can be send to same remote address with RTP
iRtp->SendDataL( ..);

13 Send Rtp Packet
iRtpApi->SendRtpPacket( ..);

14.Close session
CloseSession(..);
or delete session

15. Close RTP
delete iRtpApi;

[ecio83]

Hi all,

how could you use CRtpAPI?
I downloaded extension plugin for 3rd ed fp1, but if i want to install it in existing sdk, .lib files are put in epoc32\release\armv5\lib, while all libraries are in epoc32\release\winscw\udeb and so i can't use them. If i try to copy libraries in correct directories, when i build project i have compiling errors!

Thanks in advance,

Alessio

[hazmat]

Hi,


Paste the compiling Errors ,may be i can help u out.I Just set the CRtpAPI on my system but i'm decided to work on RtpSession.I got N95 and this phone 9.2 and supports this framework.

Haroon Azmat

[payu.sergey]

Libraries are built for DEVICE only. While you are trying to build your project for WINS. Once again, this plugin can be used only for target building.

[ecio83]

Ok. Thanks

Alessio

[hazmat]

Hi ChuanW and payu.sergey,

can u give me little clue how can u able to receviev RTP packet,means ur observer is called. I use ether real to trace and sniff the packet and I'm sure packet is reachable but observer is not called please pay ur little attention on my thread and help me in it to get out of that.

I've started a new thread with this problem please atleast comment on it to keep this thread moving.That would be helpful for next ones.

hear is my thread...

http://discussion.forum.nokia.com/fo...d.php?t=113432

Thanks inadvance ,
Haroon Azmat

[luigio18]

Hi ChuanW and payu.sergey,

can u give me little clue how can u able to receviev RTP packet,means ur observer is called. I use ether real to trace and sniff the packet and I'm sure packet is reachable but observer is not called please pay ur little attention on my thread and help me in it to get out of that.

I've started a new thread with this problem please atleast comment on it to keep this thread moving.That would be helpful for next ones.

hear is my thread...

http://discussion.forum.nokia.com/fo...d.php?t=113432

Thanks inadvance ,
Haroon Azmat

Hello Haroon,

What capture filter in ethereal do you use to trace rtp packets?

Thanks in advance and good luck with the observer

[hazmat]

I'm tracing UDP packets and Ethereal shows me in UDP protocol filter.

Haroon

[luigio18]

I'm tracing UDP packets and Ethereal shows me in UDP protocol filter.

Haroon

Thanks a lot. Do you mean that it's not possible to trace rtp content of udp packets?