/// <summary>
/// Creates SDP answer asynchronously with option to an offer received from a remote peer.
/// </summary>
/// <remarks>The WebRTC must be in the <see cref="WebRTCState.Negotiating"/></remarks>
/// <returns>The SDP answer.</returns>
/// <exception cref="InvalidOperationException">The WebRTC is not in the valid state.</exception>
/// <exception cref="ObjectDisposedException">The WebRTC has already been disposed.</exception>
/// <seealso cref="CreateOfferAsync()"/>
/// <since_tizen> 9 </since_tizen>
public async Task <string> CreateAnswerAsync()
{
ValidateWebRTCState(WebRTCState.Negotiating);
var tcsSdpCreated = new TaskCompletionSource <string>();
NativeWebRTC.SdpCreatedCallback cb = (handle, sdp, _) =>
{
tcsSdpCreated.TrySetResult(sdp);
};
string answer = null;
using (var cbKeeper = ObjectKeeper.Get(cb))
{
NativeWebRTC.CreateSDPAnswerAsync(Handle, new SafeBundleHandle(), cb, IntPtr.Zero).
ThrowIfFailed("Failed to create answer asynchronously");
answer = await tcsSdpCreated.Task.ConfigureAwait(false);
await Task.Yield();
}
return(answer);
}
/// <summary>
/// Creates SDP offer asynchronously to start a new WebRTC connection to a remote peer.
/// </summary>
/// <remarks>The WebRTC must be in the <see cref="WebRTCState.Negotiating"/></remarks>
/// <returns>The SDP offer.</returns>
/// <exception cref="InvalidOperationException">The WebRTC is not in the valid state.</exception>
/// <exception cref="ObjectDisposedException">The WebRTC has already been disposed.</exception>
/// <seealso cref="CreateAnswerAsync()"/>
/// <since_tizen> 9 </since_tizen>
public async Task <string> CreateOfferAsync()
{
ValidateWebRTCState(WebRTCState.Negotiating);
var tcsSdpCreated = new TaskCompletionSource <string>();
NativeWebRTC.SdpCreatedCallback cb = (handle, sdp, _) =>
{
tcsSdpCreated.TrySetResult(sdp);
};
NativeWebRTC.CreateSDPOfferAsync(Handle, new SafeBundleHandle(), cb, IntPtr.Zero).
ThrowIfFailed("Failed to create offer asynchronously");
var offer = await tcsSdpCreated.Task.ConfigureAwait(false);
await Task.Yield();
return(offer);
}
