Hi!

In function WebRtc_Word32 RTPSenderH264::AddH264PACSINALU that is located at 
webrtc/trunk/src/modules/rtp_rtcp/source/H264, I cannot understand the segment 
from line 166 to line 171. It is very important to me to determine the point 
that pacsi.TL0PicIDx field gets a value greater than 0.

To be more specific, at this segment

if (pacsi.Y)
{
    databuffer[curByte++] = pacsi.TL0picIDx;
    databuffer[curByte++] = (WebRtc_UWord8)(pacsi.IDRpicID >> 8);
    databuffer[curByte++] = (WebRtc_UWord8)(pacsi.IDRpicID);
}

does the field pacsi.Y ever has a value greater than 0?
If it does, can you specify me the point that pacsi.Y gets a value equal to 1?

Also, if does, can you specify me the point that pacsi.TL0picIDx gets a value 
greater than 0?

Thank you in advance,

Tolis
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