public async Task ConnectAsync(DateTime initialTimeStamp, CancellationToken token)
{
IRtspTransportClient rtspTransportClient = _transportClientProvider();
Volatile.Write(ref _rtspTransportClient, rtspTransportClient);
await _rtspTransportClient.ConnectAsync(token);
RtspRequestMessage optionsRequest = _requestMessageFactory.CreateOptionsRequest();
RtspResponseMessage optionsResponse = await _rtspTransportClient.ExecuteRequest(optionsRequest, token);
if (optionsResponse.StatusCode == RtspStatusCode.Ok)
{
ParsePublicHeader(optionsResponse.Headers[WellKnownHeaders.Public]);
}
RtspRequestMessage describeRequest = _requestMessageFactory.CreateDescribeRequest();
RtspResponseMessage describeResponse =
await _rtspTransportClient.EnsureExecuteRequest(describeRequest, token);
string contentBaseHeader = describeResponse.Headers[WellKnownHeaders.ContentBase];
if (!string.IsNullOrEmpty(contentBaseHeader))
{
_requestMessageFactory.ContentBase = new Uri(contentBaseHeader);
}
var parser = new SdpParser();
IEnumerable <RtspTrackInfo> tracks = parser.Parse(describeResponse.ResponseBody);
bool anyTrackRequested = false;
foreach (RtspMediaTrackInfo track in GetTracksToSetup(tracks))
{
await SetupTrackAsync(initialTimeStamp, track, token);
anyTrackRequested = true;
}
if (!anyTrackRequested)
{
throw new RtspClientException("Any suitable track is not found");
}
RtspRequestMessage playRequest = (initialTimeStamp != default(DateTime) ? _requestMessageFactory.CreatePlayRequest(initialTimeStamp) : _requestMessageFactory.CreatePlayRequest());
RtspResponseMessage playResponse =
await _rtspTransportClient.EnsureExecuteRequest(playRequest, token, 1);
// TODO : Create a specific parse to convert the clock values
Regex clockRegex = new Regex(@"clock=(?<startTime>\d{8}T\d{6}Z)\-(?<endTime>\d{8}T\d{6}Z)", RegexOptions.Singleline);
foreach (string playResponseHeader in playResponse.Headers.GetValues("Range"))
{
Match clockMatches = clockRegex.Match(playResponseHeader);
if (clockMatches.Success)
{
_mediaPayloadParser.BaseTime = DateTime.ParseExact(clockMatches.Groups["startTime"].Value, "yyyyMMddTHHmmssZ", CultureInfo.InvariantCulture, DateTimeStyles.None);
}
}
}
public RtspRequestMessage CreateTeardownRequest()
{
var rtspRequestMessage = new RtspRequestMessage(RtspMethod.TEARDOWN, _rtspUri, ProtocolVersion,
NextCSeqProvider, _userAgent, SessionId);
return(rtspRequestMessage);
}
public RtspRequestMessage CreateOptionsRequest()
{
var rtspRequestMessage = new RtspRequestMessage(RtspMethod.OPTIONS, _rtspUri, ProtocolVersion,
NextCSeqProvider, _userAgent, SessionId);
return(rtspRequestMessage);
}
public RtspRequestMessage CreateGetParameterRequest()
{
var rtspRequestMessage = new RtspRequestMessage(RtspMethod.GET_PARAMETER, _rtspUri, ProtocolVersion,
NextCSeqProvider, _userAgent, SessionId);
return(rtspRequestMessage);
}
public RtspRequestMessage CreateDescribeRequest()
{
var rtspRequestMessage = new RtspRequestMessage(RtspMethod.DESCRIBE, _rtspUri, ProtocolVersion,
NextCSeqProvider, _userAgent, SessionId);
rtspRequestMessage.Headers.Add("Accept", "application/sdp");
return(rtspRequestMessage);
}
private void AddAuthorizationHeader(RtspRequestMessage request)
{
Uri uri = ConnectionParameters.GetFixedRtspUri();
string headerValue = _authenticator.GetResponse(request.CSeq, uri.ToString(),
request.Method.ToString(), Array.Empty <byte>());
request.Headers.Add("Authorization", headerValue);
}
public RtspRequestMessage CreateSetupTcpInterleavedRequest(string trackName, int rtpChannel, int rtcpChannel)
{
Uri trackUri = GetTrackUri(trackName);
var rtspRequestMessage = new RtspRequestMessage(RtspMethod.SETUP, trackUri, ProtocolVersion,
NextCSeqProvider, _userAgent, SessionId);
rtspRequestMessage.Headers.Add("Transport", $"RTP/AVP/TCP;unicast;interleaved={rtpChannel}-{rtcpChannel}");
return(rtspRequestMessage);
}
public RtspRequestMessage CreateSetupUdpUnicastRequest(string trackName, int rtpPort, int rtcpPort)
{
Uri trackUri = GetTrackUri(trackName);
var rtspRequestMessage = new RtspRequestMessage(RtspMethod.SETUP, trackUri, ProtocolVersion,
NextCSeqProvider, _userAgent, SessionId);
rtspRequestMessage.Headers.Add("Transport", $"RTP/AVP/UDP;unicast;client_port={rtpPort}-{rtcpPort}");
return(rtspRequestMessage);
}
public RtspRequestMessage CreatePlayRequest()
{
Uri uri = GetContentBasedUri();
var rtspRequestMessage =
new RtspRequestMessage(RtspMethod.PLAY, uri, ProtocolVersion, NextCSeqProvider, _userAgent, SessionId);
rtspRequestMessage.Headers.Add("Range", "npt=0.000-");
return(rtspRequestMessage);
}
public RtspRequestMessage CreateSetupUdpMulticastRequest(string trackName)
{
Uri trackUri = GetTrackUri(trackName);
var rtspRequestMessage = new RtspRequestMessage(RtspMethod.SETUP, trackUri, ProtocolVersion,
NextCSeqProvider, _userAgent, SessionId);
rtspRequestMessage.Headers.Add("Transport", $"RTP/AVP;multicast");
return(rtspRequestMessage);
}
public RtspRequestMessage CreateSetupUdpUnicastRequest(string trackName, int rtpPort, int rtcpPort)
{
Uri trackUri = !Uri.IsWellFormedUriString(trackName, UriKind.Absolute)
? new Uri(GetContentBasedUri(), trackName)
: new Uri(trackName, UriKind.Absolute);
var rtspRequestMessage = new RtspRequestMessage(RtspMethod.SETUP, trackUri, ProtocolVersion,
NextCSeqProvider, _userAgent, SessionId);
rtspRequestMessage.Headers.Add("Transport", $"RTP/AVP/UDP;unicast;client_port={rtpPort}-{rtcpPort}");
return(rtspRequestMessage);
}
public RtspRequestMessage CreateSetupTcpInterleavedRequest(string trackName, int rtpChannel, int rtcpChannel)
{
Uri trackUri = !Uri.IsWellFormedUriString(trackName, UriKind.Absolute)
? new Uri(GetContentBasedUri(), trackName)
: new Uri(trackName, UriKind.Absolute);
var rtspRequestMessage = new RtspRequestMessage(RtspMethod.SETUP, trackUri, ProtocolVersion,
NextCSeqProvider, _userAgent, SessionId);
rtspRequestMessage.Headers.Add("Transport", $"RTP/AVP/TCP;unicast;interleaved={rtpChannel}-{rtcpChannel}");
return(rtspRequestMessage);
}
public async Task <RtspResponseMessage> EnsureExecuteRequest(RtspRequestMessage requestMessage,
CancellationToken token, int responseReadPortionSize = 0)
{
RtspResponseMessage responseMessage = await ExecuteRequest(requestMessage, token, responseReadPortionSize);
if (responseMessage.StatusCode != RtspStatusCode.Ok)
{
throw new RtspBadResponseCodeException(responseMessage.StatusCode);
}
return(responseMessage);
}
private async Task SendRtspKeepAliveAsync(CancellationToken token)
{
RtspRequestMessage getParameterRequest = _requestMessageFactory.CreateGetParameterRequest();
if (_connectionParameters.RtpTransport == RtpTransportProtocol.TCP)
{
await _rtspTransportClient.SendRequestAsync(getParameterRequest, token);
}
else
{
await _rtspTransportClient.EnsureExecuteRequest(getParameterRequest, token);
}
}
private async Task CloseRtspSessionAsync(CancellationToken token)
{
RtspRequestMessage teardownRequest = _requestMessageFactory.CreateTeardownRequest();
if (_connectionParameters.RtpTransport == RtpTransportProtocol.TCP)
{
await _rtspTransportClient.SendRequestAsync(teardownRequest, token);
}
else
{
await _rtspTransportClient.EnsureExecuteRequest(teardownRequest, token);
}
}
public Task SendRequestAsync(RtspRequestMessage requestMessage, CancellationToken token)
{
token.ThrowIfCancellationRequested();
if (_authenticator != null)
{
AddAuthorizationHeader(requestMessage);
}
string requestMessageString = requestMessage.ToString();
int written = Encoding.ASCII.GetBytes(requestMessageString, 0, requestMessageString.Length, _buffer, 0);
return(WriteAsync(_buffer, 0, written));
}
public async Task ConnectAsync(CancellationToken token)
{
IRtspTransportClient rtspTransportClient = _transportClientProvider();
Volatile.Write(ref _rtspTransportClient, rtspTransportClient);
await _rtspTransportClient.ConnectAsync(token);
RtspRequestMessage optionsRequest = _requestMessageFactory.CreateOptionsRequest();
RtspResponseMessage optionsResponse = await _rtspTransportClient.ExecuteRequest(optionsRequest, token);
if (optionsResponse.StatusCode == RtspStatusCode.Ok)
{
ParsePublicHeader(optionsResponse.Headers[WellKnownHeaders.Public]);
}
RtspRequestMessage describeRequest = _requestMessageFactory.CreateDescribeRequest();
RtspResponseMessage describeResponse =
await _rtspTransportClient.EnsureExecuteRequest(describeRequest, token);
string contentBaseHeader = describeResponse.Headers[WellKnownHeaders.ContentBase];
if (!string.IsNullOrEmpty(contentBaseHeader))
{
_requestMessageFactory.ContentBase = new Uri(contentBaseHeader);
}
var parser = new SdpParser();
IEnumerable <RtspTrackInfo> tracks = parser.Parse(describeResponse.ResponseBody);
bool anyTrackRequested = false;
foreach (RtspMediaTrackInfo track in GetTracksToSetup(tracks))
{
await SetupTrackAsync(track, token);
Codec = track.Codec;
anyTrackRequested = true;
}
if (!anyTrackRequested)
{
throw new RtspClientException("Any suitable track is not found");
}
RtspRequestMessage playRequest = _requestMessageFactory.CreatePlayRequest();
await _rtspTransportClient.EnsureExecuteRequest(playRequest, token, 1);
}
public RtspRequestMessage CreatePlayRequest(DateTime initialTimestamp)
{
Uri uri = GetContentBasedUri();
var rtspRequestMessage =
new RtspRequestMessage(RtspMethod.PLAY, uri, ProtocolVersion, NextCSeqProvider, _userAgent, SessionId);
if (initialTimestamp.Kind == DateTimeKind.Utc)
{
rtspRequestMessage.Headers.Add("Range", $"clock={initialTimestamp.ToString("yyyyMMddThhmmssZ")}-");
}
else
{
rtspRequestMessage.Headers.Add("Range", $"clock={DateTime.SpecifyKind(initialTimestamp, DateTimeKind.Utc).ToString("yyyyMMddThhmmssZ")}-");
}
return(rtspRequestMessage);
}
private async Task CloseRtspSessionAsync(CancellationToken token)
{
RtspRequestMessage teardownRequest = _requestMessageFactory.CreateTeardownRequest();
if (_connectionParameters.RtpTransport == RtpTransportProtocol.TCP)
{
await _rtspTransportClient.SendRequestAsync(teardownRequest, token);
}
else if (_connectionParameters.RtpTransport == RtpTransportProtocol.MULTICAST)
{
// There is no need to leave multicast group because it is done automatically by OS when socket closes
await _rtspTransportClient.EnsureExecuteRequest(teardownRequest, token);
}
else
{
await _rtspTransportClient.EnsureExecuteRequest(teardownRequest, token);
}
}
public async Task <RtspResponseMessage> ExecuteRequest(RtspRequestMessage requestMessage,
CancellationToken token, int responseReadPortionSize = 0)
{
token.ThrowIfCancellationRequested();
await SendRequestAsync(requestMessage, token);
RtspResponseMessage responseMessage = await GetResponseAsync(responseReadPortionSize);
if (responseMessage.StatusCode != RtspStatusCode.Unauthorized)
{
return(responseMessage);
}
if (ConnectionParameters.Credentials.IsEmpty() || _authenticator != null)
{
throw new RtspBadResponseCodeException(responseMessage.StatusCode);
}
string authenticateHeader = responseMessage.Headers[WellKnownHeaders.WwwAuthenticate];
if (string.IsNullOrEmpty(authenticateHeader))
{
throw new RtspBadResponseCodeException(responseMessage.StatusCode);
}
_authenticator = Authenticator.Create(ConnectionParameters.Credentials, authenticateHeader);
requestMessage.UpdateSequenceNumber();
await SendRequestAsync(requestMessage, token);
responseMessage = await GetResponseAsync();
if (responseMessage.StatusCode == RtspStatusCode.Unauthorized)
{
throw new RtspBadResponseCodeException(responseMessage.StatusCode);
}
return(responseMessage);
}
