first commit for srt intergrate

srt/Ack.cpp

@@ -0,0 +1,74 @@
+#include "Ack.hpp"
+#include "Common.hpp"
+
+namespace SRT {
+bool ACKPacket::loadFromData(uint8_t *buf, size_t len) { 
+    if(len < ACK_CIF_SIZE + ControlPacket::HEADER_SIZE){
+        return false;
+    }
+
+    _data = BufferRaw::create();
+    _data->assign((char *)(buf), len);
+    ControlPacket::loadHeader();
+    ack_number = loadUint32(type_specific_info);
+    uint8_t* ptr = (uint8_t*)_data->data()+ControlPacket::HEADER_SIZE;
+
+    last_ack_pkt_seq_number = loadUint32(ptr);
+    ptr += 4;
+
+    rtt = loadUint32(ptr);
+    ptr += 4;
+
+    rtt_variance = loadUint32(ptr);
+    ptr += 4;
+
+    available_buf_size = loadUint32(ptr);
+    ptr += 4;
+
+    pkt_recv_rate = loadUint32(ptr);
+    ptr += 4;
+
+    estimated_link_capacity = loadUint32(ptr);
+    ptr += 4;
+
+    recv_rate = loadUint32(ptr);
+    ptr += 4; 
+
+    return true;
+}
+bool ACKPacket::storeToData() { 
+    _data = BufferRaw::create();
+    _data->setCapacity(HEADER_SIZE + ACK_CIF_SIZE);
+    _data->setSize(HEADER_SIZE + ACK_CIF_SIZE);
+    control_type = ControlPacket::ACK;
+    sub_type = 0;
+
+    storeUint32(type_specific_info,ack_number);
+    storeToHeader();
+
+    uint8_t* ptr = (uint8_t*)_data->data()+ControlPacket::HEADER_SIZE;
+    
+    storeUint32(ptr,last_ack_pkt_seq_number);
+    ptr += 4;
+
+    storeUint32(ptr,rtt);
+    ptr += 4;
+
+    storeUint32(ptr,rtt_variance);
+    ptr += 4;
+
+    storeUint32(ptr,pkt_recv_rate);
+    ptr += 4;
+
+    storeUint32(ptr,available_buf_size);
+    ptr += 4;
+
+    storeUint32(ptr,estimated_link_capacity);
+    ptr += 4;
+
+    storeUint32(ptr,recv_rate);
+    ptr += 4;
+
+    return true;
+}
+} // namespace