diff options
Diffstat (limited to 'tinyRTP/src/rtcp/trtp_rtcp_sdes_chunck.c')
| -rw-r--r-- | tinyRTP/src/rtcp/trtp_rtcp_sdes_chunck.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/tinyRTP/src/rtcp/trtp_rtcp_sdes_chunck.c b/tinyRTP/src/rtcp/trtp_rtcp_sdes_chunck.c new file mode 100644 index 0000000..9104580 --- /dev/null +++ b/tinyRTP/src/rtcp/trtp_rtcp_sdes_chunck.c @@ -0,0 +1,190 @@ +/* +* 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_sdes_chunck.h" + +#include "tnet_endianness.h" + +#include "tsk_debug.h" + +/* +Each chunk consists of an SSRC/CSRC identifier followed by a list of + zero or more items, which carry information about the SSRC/CSRC. + Each chunk starts on a 32-bit boundary. Each item consists of an 8- + bit type field, an 8-bit octet count describing the length of the + text (thus, not including this two-octet header), and the text + itself. Note that the text can be no longer than 255 octets, but + this is consistent with the need to limit RTCP bandwidth consumption. + ++=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ +| SSRC/CSRC_1 | ++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +| SDES items | +| ... | ++=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+ +*/ + +static tsk_object_t* trtp_rtcp_sdes_chunck_ctor(tsk_object_t * self, va_list * app) +{ + trtp_rtcp_sdes_chunck_t *chunck = self; + if(chunck){ + chunck->items = tsk_list_create(); + } + return self; +} +static tsk_object_t* trtp_rtcp_sdes_chunck_dtor(tsk_object_t * self) +{ + trtp_rtcp_sdes_chunck_t *chunck = self; + if(chunck){ + TSK_OBJECT_SAFE_FREE(chunck->items); + } + + return self; +} +static const tsk_object_def_t trtp_rtcp_sdes_chunck_def_s = +{ + sizeof(trtp_rtcp_sdes_chunck_t), + trtp_rtcp_sdes_chunck_ctor, + trtp_rtcp_sdes_chunck_dtor, + tsk_null, +}; +const tsk_object_def_t *trtp_rtcp_sdes_chunck_def_t = &trtp_rtcp_sdes_chunck_def_s; + + + +trtp_rtcp_sdes_chunck_t* trtp_rtcp_sdes_chunck_create_null() +{ + return tsk_object_new(trtp_rtcp_sdes_chunck_def_t); +} + +trtp_rtcp_sdes_chunck_t* trtp_rtcp_sdes_chunck_create(uint32_t ssrc) +{ + trtp_rtcp_sdes_chunck_t* chunck; + if((chunck = trtp_rtcp_sdes_chunck_create_null())){ + chunck->ssrc = ssrc; + } + return chunck; +} + +trtp_rtcp_sdes_chunck_t* trtp_rtcp_sdes_chunck_deserialize(const void* data, tsk_size_t size) +{ + trtp_rtcp_sdes_chunck_t* chunck = tsk_null; + const uint8_t* pdata = (uint8_t*)data; + const uint8_t* pend; + if(!data || size < TRTP_RTCP_SDES_CHUNCK_MIN_SIZE){ + TSK_DEBUG_ERROR("Invalid parameter"); + return tsk_null; + } + + pend = (pdata + size); + if((chunck = trtp_rtcp_sdes_chunck_create_null())){ + trtp_rtcp_sdes_item_t* item; + tsk_bool_t is_last_item = tsk_false; + // SSRC/CSRC + chunck->ssrc = (uint32_t)tnet_ntohl_2(pdata); + pdata += TRTP_RTCP_SDES_CHUNCK_SSRC_OR_CSRC_SIZE; + while((pdata < pend) && !is_last_item){ + if((item = trtp_rtcp_sdes_item_deserialize(pdata, (pend-pdata)))){ + is_last_item = (item->type == trtp_rtcp_sdes_item_type_end); + pdata += trtp_rtcp_sdes_item_get_size(item); + tsk_list_push_back_data(chunck->items, (void**)&item); + } + else{ + TSK_DEBUG_ERROR("Failed to deserialize sdes item"); + break; + } + } + } + else{ + TSK_DEBUG_ERROR("Failed to create new sdes_chunck object"); + return tsk_null; + } + + return chunck; +} + +int trtp_rtcp_sdes_chunck_serialize_to(const trtp_rtcp_sdes_chunck_t* self, void* data, tsk_size_t size) +{ + uint8_t* pdata = (uint8_t*)data; + const tsk_list_item_t* item; + const trtp_rtcp_sdes_item_t* sdes_item; + tsk_size_t sdes_item_size; + int ret = 0; + + if(!self || !data || size < trtp_rtcp_sdes_chunck_get_size(self)){ + TSK_DEBUG_ERROR("Invalid parameter"); + return -1; + } + + pdata[0] = self->ssrc >> 24; + pdata[1] = (self->ssrc >> 16) & 0xFF; + pdata[2] = (self->ssrc >> 8) & 0xFF; + pdata[3] = (self->ssrc & 0xFF); + pdata += 4; + + tsk_list_foreach(item, self->items){ + if(!(sdes_item = TRTP_RTCP_SDES_ITEM(item->data))){ + continue; + } + if((ret = trtp_rtcp_sdes_item_serialize_to(sdes_item, pdata, size))){ + TSK_DEBUG_ERROR("SDES item serialization failed"); + goto bail; + } + sdes_item_size = trtp_rtcp_sdes_item_get_size(sdes_item); + pdata += sdes_item_size; size -= sdes_item_size; + } + +bail: + return ret; +} + +int trtp_rtcp_sdes_chunck_add_item(trtp_rtcp_sdes_chunck_t* self, trtp_rtcp_sdes_item_type_t type, const void* data, uint8_t length) +{ + trtp_rtcp_sdes_item_t *item; + if(!self || !self->items){ + TSK_DEBUG_ERROR("Invalid parameter"); + return -1; + } + if((item = trtp_rtcp_sdes_item_create(type, data, length))){ + tsk_list_push_back_data(self->items, (void**)&item); + } + return 0; +} + +tsk_size_t trtp_rtcp_sdes_chunck_get_size(const trtp_rtcp_sdes_chunck_t* self) +{ + const tsk_list_item_t* item; + if(!self){ + TSK_DEBUG_ERROR("Invalid parameter"); + return 0; + } + else{ + tsk_size_t size = TRTP_RTCP_SDES_CHUNCK_SSRC_OR_CSRC_SIZE; + tsk_list_foreach(item, self->items){ + size += trtp_rtcp_sdes_item_get_size(TRTP_RTCP_SDES_ITEM(item->data)); + } + if(size & 0x03){//Each chunk starts on a 32-bit boundary + size += (4 - (size & 0x03)); + } + return size; + } +} + |
