RTCP_RR_Packet Class Reference

The Receiver Report packet is sent by all members of a session that are not sending data. It contains a list of RR_Block to represent each source this party is receiving data from. More...

#include <RTCP_Packet.h>

Inheritance diagram for RTCP_RR_Packet:

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Collaboration diagram for RTCP_RR_Packet:

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List of all members.

Public Member Functions

 RTCP_RR_Packet (char *buffer, int *len)
 Constructor for incoming receiver reports.
 RTCP_RR_Packet (ACE_UINT32 ssrc, RR_Block *blocks)
 Constructor for outgoing receiver reports.
virtual ~RTCP_RR_Packet (void)
 Destructor.
unsigned int packet_size (void)
 Returns the size of the packet in bytes.
ACE_INT32 ssrc (void)
 Returns the synchronization source id of the source sending this packet.
void dump (void)
 Prints the contents of the packet.

Private Member Functions

void build_packet (void)
 Used to create the byte representation of the RTCP packet.

Private Attributes

ACE_UINT32 ssrc_
 The synchronization source id of the sender of this report.
RR_Block * rr_
 A linked list of the receiver report block(s) being sent.

Detailed Description

The Receiver Report packet is sent by all members of a session that are not sending data. It contains a list of RR_Block to represent each source this party is receiving data from.

Definition at line 175 of file RTCP_Packet.h.

Constructor & Destructor Documentation

RTCP_RR_Packet::RTCP_RR_Packet ( char *  buffer,
int *  len 
)

Constructor for incoming receiver reports.

Definition at line 294 of file RTCP_Packet.cpp.

References ACE_NEW, ACE_NTOHL, RTCP_Packet::chd_, RTCP_Common_Header::count_, RR_Block::dlsr_, RR_Block::fraction_, RR_Block::jitter_, RR_Block::last_seq_, RTCP_Common_Header::length_, RR_Block::lost_, RR_Block::lsr_, RR_Block::next_, RTCP_Packet::packet_data_, rr_, RR_Block::ssrc_, and ssrc_.

00296   :RTCP_Packet (buffer)
00297 {
00298   unsigned int i = 0;
00299   RR_Block *local_block_ptr = 0;
00300 
00301   this->rr_ = 0;
00302 
00303   // The common part of the header is initialized in the parent.
00304   i=4;
00305   this->ssrc_ = ACE_NTOHL(*(ACE_UINT32*)&buffer[i]);
00306   i+=4;
00307   for (unsigned int j=0; j<this->chd_.count_; j++)
00308     {
00309       if (j==0)
00310         {
00311           ACE_NEW (this->rr_,
00312                    RR_Block);
00313           local_block_ptr = this->rr_;
00314         }
00315       else
00316         {
00317           ACE_NEW (local_block_ptr->next_,
00318                    RR_Block);
00319           local_block_ptr = local_block_ptr->next_;
00320         }
00321 
00322       local_block_ptr->next_ = 0;
00323       local_block_ptr->ssrc_ = ACE_NTOHL(*(ACE_UINT32*)&buffer[i]);
00324       i+=4;
00325       ACE_UINT32 temp = ACE_NTOHL(*(ACE_UINT32*)&buffer[i]);
00326       local_block_ptr->fraction_ = (temp&0xff000000) >> 24;
00327       local_block_ptr->lost_ = temp & 0x00ffffff;
00328       i+=4;
00329       local_block_ptr->last_seq_ = ACE_NTOHL(*(ACE_UINT32*)&buffer[i]);
00330       i+=4;
00331       local_block_ptr->jitter_ = ACE_NTOHL(*(ACE_UINT32*)&buffer[i]);
00332       i+=4;
00333       local_block_ptr->lsr_ = ACE_NTOHL(*(ACE_UINT32*)&buffer[i]);
00334       i+=4;
00335       local_block_ptr->dlsr_ = ACE_NTOHL(*(ACE_UINT32*)&buffer[i]);
00336       i+=4;
00337     }
00338 
00339   *len-=(this->chd_.length_+1)*4;
00340 
00341   this->packet_data_ = 0;
00342 }

RTCP_RR_Packet::RTCP_RR_Packet ( ACE_UINT32  ssrc,
RR_Block *  blocks 
)

Constructor for outgoing receiver reports.

Definition at line 263 of file RTCP_Packet.cpp.

References RTCP_Packet::chd_, RTCP_Common_Header::count_, RTCP_Common_Header::length_, RR_Block::next_, RTCP_Packet::packet_data_, RTCP_Common_Header::pt_, rr_, RTCP_PT_RR, ssrc_, and RTCP_Common_Header::ver_.

00264 {
00265   RR_Block *block_ptr = blocks;
00266 
00267   this->chd_.count_ = 0;
00268   this->chd_.ver_ = 2;
00269   this->chd_.pt_ = RTCP_PT_RR;
00270   this->ssrc_ = ssrc;
00271   this->rr_ = blocks;
00272 
00273   while (block_ptr)
00274     {
00275       this->chd_.count_++;
00276 
00277       // Can only have 31 receiver reports
00278       if (this->chd_.count_ == 31)
00279         {
00280           block_ptr->next_ = 0;
00281           break;
00282         }
00283 
00284       block_ptr = block_ptr->next_;
00285     }
00286 
00287   this->chd_.length_ = static_cast<ACE_UINT16> (1+6*(this->chd_.count_)); // + profile specific extensions ??
00288 
00289   this->packet_data_ = 0;
00290 }

RTCP_RR_Packet::~RTCP_RR_Packet ( void   )  [virtual]

Destructor.

Definition at line 346 of file RTCP_Packet.cpp.

References RR_Block::next_, RTCP_Packet::packet_data_, and rr_.

00347 {
00348   RR_Block *prev;
00349 
00350   if (this->rr_)
00351     {
00352       while (this->rr_)
00353         {
00354           prev = this->rr_;
00355           this->rr_ = this->rr_->next_;
00356           delete prev;
00357         }
00358     }
00359 
00360   if (this->packet_data_)
00361     delete []this->packet_data_;
00362 }

Member Function Documentation

void RTCP_RR_Packet::build_packet ( void   )  [private, virtual]

Used to create the byte representation of the RTCP packet.

Implements RTCP_Packet.

Definition at line 376 of file RTCP_Packet.cpp.

References ACE_HTONL, ACE_HTONS, ACE_NEW, RTCP_Packet::chd_, RTCP_Common_Header::count_, RR_Block::dlsr_, RR_Block::fraction_, RR_Block::jitter_, RR_Block::last_seq_, RTCP_Common_Header::length_, RR_Block::lost_, RR_Block::lsr_, RR_Block::next_, RTCP_Packet::packet_data_, RTCP_Common_Header::pt_, rr_, RR_Block::ssrc_, and RTCP_Common_Header::ver_.

00377 {
00378   int index;
00379   RR_Block *local_block_ptr;
00380 
00381   if (this->packet_data_)
00382     delete []this->packet_data_;
00383 
00384   ACE_NEW (this->packet_data_,
00385            char [this->packet_size ()]);
00386 
00387   index = 0;
00388   this->packet_data_[index] = static_cast<char> ((this->chd_.ver_ << 6) |
00389                                                  (this->chd_.pad_ << 5) |
00390                                                  this->chd_.count_);
00391   index++;
00392   this->packet_data_[index] = chd_.pt_;
00393   index++;
00394   *((ACE_UINT16*)&this->packet_data_[index]) = ACE_HTONS(chd_.length_);
00395   index+=2;
00396   *((ACE_UINT32*)&this->packet_data_[index]) = ACE_HTONL(this->ssrc_);
00397   index+=4;
00398 
00399   local_block_ptr = this->rr_;
00400   while (local_block_ptr)
00401     {
00402       *((ACE_UINT32*)&this->packet_data_[index]) = ACE_HTONL(local_block_ptr->ssrc_);
00403       index+=4;
00404       ACE_UINT32 temp = ACE_HTONL((local_block_ptr->fraction_&0xff) << 24) &
00405                               local_block_ptr->lost_;
00406       *((ACE_UINT32*)&this->packet_data_[index]) = temp;
00407       index+=4;
00408       *((ACE_UINT32*)&this->packet_data_[index]) = ACE_HTONL(local_block_ptr->last_seq_);
00409       index+=4;
00410       *((ACE_UINT32*)&this->packet_data_[index]) = ACE_HTONL(local_block_ptr->jitter_);
00411       index+=4;
00412       *((ACE_UINT32*)&this->packet_data_[index]) = ACE_HTONL(local_block_ptr->lsr_);
00413       index+=4;
00414       *((ACE_UINT32*)&this->packet_data_[index]) = ACE_HTONL(local_block_ptr->dlsr_);
00415       index+=4;
00416       local_block_ptr = local_block_ptr->next_;
00417     }
00418 }

void RTCP_RR_Packet::dump ( void   ) 

Prints the contents of the packet.

Definition at line 421 of file RTCP_Packet.cpp.

References ACE_DEBUG, RR_Block::dlsr_, RR_Block::fraction_, RR_Block::jitter_, RR_Block::last_seq_, LM_DEBUG, RR_Block::lost_, RR_Block::lsr_, RR_Block::next_, rr_, and RR_Block::ssrc_.

Referenced by TAO_AV_RTCP_Callback::receive_control_frame().

00422 {
00423   RR_Block *b = this->rr_;
00424   int count = 1;
00425 
00426   ACE_DEBUG ((LM_DEBUG,
00427               "\nRTCP_RR_Packet:: from %u - %d rr blocks follow.\n",
00428               this->ssrc_,
00429               this->chd_.count_));
00430 
00431   while (b)
00432     {
00433       ACE_DEBUG ((LM_DEBUG,
00434                   "  Block %d: ssrc %u; frac %u; lost %u; last seq %u\n",
00435                   count,
00436                   b->ssrc_,
00437                   b->fraction_,
00438                   b->lost_,
00439                   b->last_seq_));
00440       ACE_DEBUG ((LM_DEBUG,
00441                   "           jitter %u; lsr %u; dlsr %u;\n",
00442                   b->jitter_,
00443                   b->lsr_,
00444                   b->dlsr_));
00445 
00446       b = b->next_;
00447       ++count;
00448     }
00449 }

unsigned int RTCP_RR_Packet::packet_size ( void   )  [virtual]

Returns the size of the packet in bytes.

Implements RTCP_Packet.

Definition at line 367 of file RTCP_Packet.cpp.

References RTCP_Packet::chd_, and RTCP_Common_Header::count_.

00368 {
00369     ACE_UINT16 size = static_cast<ACE_UINT16> ((2+this->chd_.count_*6) * 4);
00370     return size;
00371 }

ACE_INT32 RTCP_RR_Packet::ssrc ( void   )  [inline]

Returns the synchronization source id of the source sending this packet.

Definition at line 191 of file RTCP_Packet.h.

References ssrc_.

Referenced by TAO_AV_RTCP_Callback::receive_control_frame().

00191 { return this->ssrc_; }

Member Data Documentation

RR_Block* RTCP_RR_Packet::rr_ [private]

A linked list of the receiver report block(s) being sent.

Definition at line 204 of file RTCP_Packet.h.

Referenced by build_packet(), dump(), RTCP_RR_Packet(), and ~RTCP_RR_Packet().

ACE_UINT32 RTCP_RR_Packet::ssrc_ [private]

The synchronization source id of the sender of this report.

Definition at line 201 of file RTCP_Packet.h.

Referenced by RTCP_RR_Packet(), and ssrc().

The documentation for this class was generated from the following files:
Generated on Tue Feb 2 17:47:58 2010 for TAO_AV by  doxygen 1.4.7