public void Specificationhelper_CreateSessionMedia_Success()
{
// *** ARRANGE ***
string smField = "m=audio 49170 RTP/AVP 0 8 97";
string[] smaFields = new string[]
{
"a=rtpmap:0 PCMU/8000",
"a=rtpmap:8 PCMA/8000",
"a=rtpmap:97 iLBC/8000"
};
SessionMedia expected = new SessionMedia("audio", 49170, "RTP/AVP", "0", "8", "97");
expected.AddMediaValueAttribute("rtpmap", "0 PCMU/8000");
expected.AddMediaValueAttribute("rtpmap", "8 PCMA/8000");
expected.AddMediaValueAttribute("rtpmap", "97 iLBC/8000");
// *** ACT ***
SessionMedia result = SpecificationHelpers.CreateMedia(smField, smaFields);
// *** ASSERT ***
string eEncoded = expected.Encode();
string rEncoded = result.Encode();
Assert.Equal(eEncoded, rEncoded);
}
/// <summary>
/// Create new session media from sessdion description fields.
/// </summary>
/// <param name="mediaSessionDescriptionField">Session media description field.</param>
/// <param name="mediaAttributesFields">Media attributes fields.</param>
/// <returns>Session media object.</returns>
/// <exception cref="SdpFormatException">Invalid format of session description field.</exception>
public static SessionMedia CreateMedia(string mediaSessionDescriptionField, params string[] mediaAttributesFields)
{
// handle media description field
string mediaFieldValue = GetFieldValue(mediaSessionDescriptionField);
SessionMedia sm;
try
{
// m=<media> <port> <proto> <fmt>
string[] mediaValues = mediaFieldValue.Split(' ');
bool portParsed = Int32.TryParse(mediaValues[1], out int port); // port is expected on second position
if (mediaValues.Length < 3 || !portParsed)
{
throw new SdpFormatException();
}
if (mediaValues.Length > 3)
{
// create session media with fmt
int fmtCount = mediaValues.Length - 3;
string[] fmt = new string[fmtCount];
Array.Copy(mediaValues, 3, fmt, 0, fmtCount);
sm = new SessionMedia(mediaValues[0], port, mediaValues[2], fmt);
}
else
{
// create session media without fmt
sm = new SessionMedia(mediaValues[0], port, mediaValues[2]);
}
sm.OriginalField = mediaSessionDescriptionField;
}
catch (Exception e)
{
if (e is IndexOutOfRangeException || e is SdpFormatException)
{
throw new SdpFormatException("Invalid format of session media field field.");
}
throw;
}
// handle meddia attributes
foreach (string mediaAttribute in mediaAttributesFields)
{
sm.AddMediaAttribute(CreateAttribute(mediaAttribute));
}
return(sm);
}
