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Change to make the VP8-RTP Fragmentation (FI bits) setting (in the payload header)

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agree with "draft-westin-payload-vp8-02" document.

This issue was raised in: http://code.google.com/p/webrtc/issues/detail?id=31 
Review URL: http://webrtc-codereview.appspot.com/92005

git-svn-id: http://webrtc.googlecode.com/svn/trunk@285 4adac7df-926f-26a2-2b94-8c16560cd09d
This commit is contained in:
marpan@google.com 2011-08-01 21:47:46 +00:00
parent 191b780741
commit 5fc2dcd64a
2 changed files with 20 additions and 3 deletions
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21
src/modules/rtp_rtcp/source/rtp_format_vp8.cc
View File

@ -180,9 +180,8 @@ int RtpFormatVp8::WriteHeaderAndPayload(int payload_bytes,
buffer[0] = 0;
if (hdr_info_.nonReference) buffer[0] |= (0x01 << 3); // N
if (!first_fragment_) buffer[0] |= (0x01 << 2); // FI
if (!end_of_fragment) buffer[0] |= (0x01 << 1); // FI
if (beginning_) buffer[0] |= 0x01; // B
buffer[0] |= (GetFIFlag(end_of_fragment) << 1); // FI
if (beginning_) buffer[0] |= 0x01; // B
int pic_id_len = WritePictureID(&buffer[vp8_header_bytes_],
buffer_length - vp8_header_bytes_);
@ -252,4 +251,20 @@ int RtpFormatVp8::PictureIdLength() const
}
}
int RtpFormatVp8::GetFIFlag(bool end_of_fragment) const
{
if (first_fragment_ && end_of_fragment) {
return 0x0;
}
else if (first_fragment_ && !end_of_fragment) {
return 0x1;
}
else if (!first_fragment_ && !end_of_fragment) {
return 0x2;
}
else if (!first_fragment_ && end_of_fragment) {
return 0x3;
}
}
} // namespace webrtc

2
src/modules/rtp_rtcp/source/rtp_format_vp8.h
View File

@ -105,6 +105,8 @@ private:
// header. Can be 0, 1, or 2.
int PictureIdLength() const;
int GetFIFlag(bool end_of_fragment) const;
const WebRtc_UWord8* payload_data_;
const int payload_size_;
RTPFragmentationHeader part_info_;