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/*
* Copyright (C) 2012 Doubango Telecom <http://www.doubango.org>
*
* Contact: Mamadou Diop <diopmamadou(at)doubango.org>
*
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* DOUBANGO is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with DOUBANGO.
*
*/
#include "tinyrtp/rtcp/trtp_rtcp_header.h"
#include "tnet_endianness.h"
#include "tsk_memory.h"
#include "tsk_debug.h"
/*
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
header |V=2|P| RC | PT=SR=200 | length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
trtp_rtcp_header_t* trtp_rtcp_header_create_null()
{
return tsk_object_new(trtp_rtcp_header_def_t);
}
trtp_rtcp_header_t* trtp_rtcp_header_create(uint8_t version, uint8_t padding, uint8_t rc, trtp_rtcp_packet_type_t type, uint16_t length_in_bytes)
{
trtp_rtcp_header_t* header;
if((header = trtp_rtcp_header_create_null())){
header->version = version;
header->padding = padding;
header->rc = rc;
header->type = type;
header->length_in_words_minus1 = ((length_in_bytes >> 2) - 1);
header->length_in_bytes = length_in_bytes;
}
return header;
}
int trtp_rtcp_header_serialize_to(const trtp_rtcp_header_t *self, void* data, tsk_size_t size)
{
uint8_t* pdata = (uint8_t*)data;
if(!self || !data || size < TRTP_RTCP_HEADER_SIZE){
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
// Octet-0: version(2), Padding(1), RC(5)
pdata[0] = ((uint8_t)self->version)<<6 |
((uint8_t)self->padding)<<5 |
((uint8_t)self->rc);
// Octet-1: PT(8)
pdata[1] = self->type;
// Octet-2 and Octet3: length (16)
pdata[2] = self->length_in_words_minus1 >> 8;
pdata[3] = self->length_in_words_minus1 & 0xFF;
return 0;
}
trtp_rtcp_header_t* trtp_rtcp_header_deserialize(const void *data, tsk_size_t size)
{
trtp_rtcp_header_t* header = tsk_null;
if(trtp_rtcp_header_deserialize_to(&header, data, size) != 0){
TSK_DEBUG_ERROR("Failed to deserialize the rtcp header");
TSK_OBJECT_SAFE_FREE(header);
}
return header;
}
int trtp_rtcp_header_deserialize_to(trtp_rtcp_header_t** self, const void *data, tsk_size_t size)
{
const uint8_t* pdata = (uint8_t*)data;
if(!self || !data || size < TRTP_RTCP_HEADER_SIZE){
TSK_DEBUG_ERROR("Invalid parameter");
return -1;
}
if(!*self && !(*self = trtp_rtcp_header_create_null())){
TSK_DEBUG_ERROR("Failed to create new rtcp header");
return -3;
}
(*self)->version = pdata[0] >> 6;
(*self)->padding = (pdata[0] >> 5) & 0x01;
(*self)->rc = (pdata[0] & 0x1f);
(*self)->type = (enum trtp_rtcp_packet_type_e)pdata[1];
(*self)->length_in_words_minus1 = tnet_ntohs_2(&pdata[2]);
(*self)->length_in_bytes = ((*self)->length_in_words_minus1 + 1) << 2;
return 0;
}
//=================================================================================================
// RTCP header object definition
//
static tsk_object_t* trtp_rtcp_header_ctor(tsk_object_t * self, va_list * app)
{
trtp_rtcp_header_t *header = self;
if(header){
}
return self;
}
static tsk_object_t* trtp_rtcp_header_dtor(tsk_object_t * self)
{
trtp_rtcp_header_t *header = self;
if(header){
}
return self;
}
static const tsk_object_def_t trtp_rtcp_header_def_s =
{
sizeof(trtp_rtcp_header_t),
trtp_rtcp_header_ctor,
trtp_rtcp_header_dtor,
tsk_null,
};
const tsk_object_def_t *trtp_rtcp_header_def_t = &trtp_rtcp_header_def_s;
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