MediaController::Rtsp::SdpParser Class Reference

Parses the SDP packets sent from an RTSP source. More...

#include <RtspSdpParser.h>

Public Member Functions
	SdpParser ()
	Default constructor. More...
	~SdpParser ()
	Default destructor. More...
const std::vector< MediaDescription > &	GetMediaDescriptions () const
	Get all available media descriptions. More...
const MediaDescription &	GetFirstVideo ()
	Get the first available video media description. More...
const MediaDescription &	GetFirstAudio ()
	Get the first available audio media description. More...
void	Parse (const std::string &sdp)
	Parses a raw SDP packet string. More...

Public Attributes
std::string	sessionControlUri
	The session control URI. More...

Private Attributes
std::vector< MediaDescription >	_mediaDescriptions

Detailed Description

Parses the SDP packets sent from an RTSP source.

Definition at line 12 of file RtspSdpParser.h.

Constructor & Destructor Documentation

SdpParser::SdpParser

(

)

Default constructor.

Definition at line 16 of file RtspSdpParser.cpp.

{}

SdpParser::~SdpParser

(

)

Default destructor.

Definition at line 18 of file RtspSdpParser.cpp.

{}

Member Function Documentation

const MediaDescription & SdpParser::GetFirstAudio

(

)

Get the first available audio media description.

Returns

An empty MediaDescription if no description is found, otherwise the first audio MediaDescription.

Definition at line 78 of file RtspSdpParser.cpp.

                                                 {
    for (size_t i = 0; i < _mediaDescriptions.size(); i++) {
        const MediaDescription& md = _mediaDescriptions[i];
        if (md.type == "audio")
            return md;
    }
    return EmptyMediaDescription;
}

const MediaDescription & SdpParser::GetFirstVideo

(

)

Get the first available video media description.

Returns

An empty MediaDescription if no description is found, otherwise the first video MediaDescription.

Definition at line 69 of file RtspSdpParser.cpp.

                                                 {
    for (size_t i = 0; i < _mediaDescriptions.size(); i++) {
        const MediaDescription& md = _mediaDescriptions[i];
        if (md.type == "video")
            return md;
    }
    return EmptyMediaDescription;
}

const vector< MediaDescription > & SdpParser::GetMediaDescriptions

(

)

const

Get all available media descriptions.

Returns

A list of MediaDescription objects.

Definition at line 20 of file RtspSdpParser.cpp.

                                                                      {
    return this->_mediaDescriptions;
}

void SdpParser::Parse

(

const std::string &

sdp

)

Parses a raw SDP packet string.

Parameters

sdp	The SDP packet as a string.

Definition at line 24 of file RtspSdpParser.cpp.

                                       {
    this->_mediaDescriptions.clear();
    this->sessionControlUri.clear();
    stringstream sdpStream(sdp);
    string line;
    bool reachedMedia = false;

    MediaDescription media;
    while (getline(sdpStream, line)) {
        if (!reachedMedia && line.substr(0, 10) == "a=control:")
            ParseControlLocation(line, sessionControlUri);

        // Check if the current line is the start a new media stream description.
        if (line.substr(0, 2) == "m=") {
            reachedMedia = true;
            if (!media.type.empty()) {
                this->_mediaDescriptions.push_back(media);
                media = EmptyMediaDescription;
            }
            ParseMediaDescription(line, media.type, media.port, media.protocol, media.payload);
        }
        else if (line.substr(0, 7) == "a=type:"){
            media.conferenceType = line.substr(7);
            boost::trim(media.conferenceType);
        }
        else if (line.substr(0, 2) == "c=")
            ParseConnectionInformation(line, media.ip, media.ttl, media.isMulticast);
        else if (!media.type.empty()) {
            // If the line contains the connection information, parse it.
            if (line.substr(0, 2) == "c=")
                ParseConnectionInformation(line, media.ip, media.ttl, media.isMulticast);
            // If the line contains the RTP map, parse it.
            else if (line.substr(0, 9) == "a=rtpmap:")
                ParseRtpMap(line, media.payload, media.encoding, media.rate);
            else if (line.substr(0, 7) == "a=fmtp:")
                ParseFormatParams(line, media.packetizationMode, media.profileLevelId, media.spropParameterSets);
            else if (line.substr(0, 10) == "a=control:")
                ParseControlLocation(line, media.controlUri);
        }
    }

    if (!media.type.empty())
        this->_mediaDescriptions.push_back(media);
}

Member Data Documentation

std::vector<MediaDescription> MediaController::Rtsp::SdpParser::_mediaDescriptions

private

Definition at line 57 of file RtspSdpParser.h.

std::string MediaController::Rtsp::SdpParser::sessionControlUri

The session control URI.

Definition at line 54 of file RtspSdpParser.h.

---

The documentation for this class was generated from the following files:

• C:/Git/VxSDK-Samples/MediaController/Include/RtspSdpParser.h
• C:/Git/VxSDK-Samples/MediaController/Source/RtspSdpParser.cpp