zqz/platform-external-webrtc
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Use RtcpPacket to send SLI in RtcpSender

Browse Source 
BUG=webrtc:2450

Review URL: https://codereview.webrtc.org/1268383002

Cr-Commit-Position: refs/heads/master@{#9695}
This commit is contained in:
sprang
2015-08-11 01:02:37 -07:00
committed by Commit bot
parent 4bc66fc387
commit 0365a27f56
2 changed files with 13 additions and 25 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
webrtc/modules/rtp_rtcp/source/rtcp_sender.cc
View File

@ -593,31 +593,18 @@ RTCPSender::BuildResult RTCPSender::BuildFIR(RtcpContext* ctx) {
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
RTCPSender::BuildResult RTCPSender::BuildSLI(RtcpContext* ctx) {
// sanity
if (ctx->position + 16 >= IP_PACKET_SIZE)
rtcp::Sli sli;
sli.From(ssrc_);
sli.To(remote_ssrc_);
// Crop picture id to 6 least significant bits.
sli.WithPictureId(ctx->picture_id & 0x3F);
sli.WithFirstMb(0);
sli.WithNumberOfMb(0x1FFF); // 13 bits, only ones for now.
PacketBuiltCallback callback(ctx);
if (!callback.BuildPacket(sli))
return BuildResult::kTruncated;
// add slice loss indicator
uint8_t FMT = 2;
*ctx->AllocateData(1) = 0x80 + FMT;
*ctx->AllocateData(1) = 206;
// Used fixed length of 3
*ctx->AllocateData(1) = 0;
*ctx->AllocateData(1) = 3;
// Add our own SSRC
ByteWriter<uint32_t>::WriteBigEndian(ctx->AllocateData(4), ssrc_);
// Add the remote SSRC
ByteWriter<uint32_t>::WriteBigEndian(ctx->AllocateData(4), remote_ssrc_);
// Add first, number & picture ID 6 bits
// first = 0, 13 - bits
// number = 0x1fff, 13 - bits only ones for now
uint32_t sliField = (0x1fff << 6) + (0x3f & ctx->picture_id);
ByteWriter<uint32_t>::WriteBigEndian(ctx->AllocateData(4), sliField);
return BuildResult::kSuccess;
}