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/*
* Copyright (c) 2012 Yoann Blein
* Licensed under the simplified BSD license.
* See Documentation/Licenses/BSD-simplified.txt for more information.
*/
#include <Swiften/ScreenSharing/VP8RTPPacketizer.h>
namespace Swift {
VP8RTPPacketizer::VP8RTPPacketizer()
{
}
void VP8RTPPacketizer::packetizeFrame(const vpx_codec_cx_pkt_t* pkt)
{
if (pkt->kind != VPX_CODEC_CX_FRAME_PKT)
return;
// only case there is no partitions is handle (TODO: implement partitions)
if (pkt->data.frame.partition_id != -1)
return;
size_t size = pkt->data.frame.sz;
uint8_t* buf = static_cast<uint8_t*>(pkt->data.frame.buf);
size_t sent = 0;
bool firstPacket = true;
while (sent < size) {
payloadBuffer.clear();
// Payload descriptor
uint8_t req = 0;
if (firstPacket)
req |= SBit;
payloadBuffer.push_back(req);
// Payload header
if (firstPacket) {
firstPacket = false;
uint8_t o1 = (size & Size0BitMask) << Size0BitShift; // Size0
o1 |= HBit; // H (show frame)
if (!(pkt->data.frame.flags & VPX_FRAME_IS_KEY))
o1 |= 1; // P (Inverse key frame)
payloadBuffer.push_back(o1);
payloadBuffer.push_back(static_cast<uint8_t>(size >> 3)); // Size1
payloadBuffer.push_back(static_cast<uint8_t>(size >> 11)); // Size2
}
// Payload content
size_t toSend = std::min(size - sent, MaxRTPPayloadSize - payloadBuffer.size());
payloadBuffer.insert(payloadBuffer.end(), buf, buf + toSend);
sent += toSend;
buf += toSend;
// Mark rtp packet if last of the curr frame
bool lastPacket = (sent >= size);
// TODO: send packet
//parser.newPayloadReceived(&payloadBuffer[0], payloadBuffer.size(), lastPacket);
onNewPayloadReady(payloadBuffer, lastPacket);
}
}
}
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Swift