557 lines
18 KiB
C#
557 lines
18 KiB
C#
using System;
|
|
using System.Collections;
|
|
using System.Collections.Generic;
|
|
using System.Linq;
|
|
using Unity.WebRTC;
|
|
using Unity.WebRTC.Samples;
|
|
using UnityEngine;
|
|
using UnityEngine.UI;
|
|
using Button = UnityEngine.UI.Button;
|
|
using Toggle = UnityEngine.UI.Toggle;
|
|
|
|
class BandwidthSample : MonoBehaviour
|
|
{
|
|
#pragma warning disable 0649
|
|
[SerializeField] private Dropdown bandwidthSelector;
|
|
[SerializeField] private Dropdown scaleResolutionDownSelector;
|
|
[SerializeField] private Dropdown framerateSelector;
|
|
[SerializeField] private Button callButton;
|
|
[SerializeField] private Button hangUpButton;
|
|
[SerializeField] private InputField statsField;
|
|
[SerializeField] private Toggle autoScroll;
|
|
[SerializeField] private Button copyClipboard;
|
|
|
|
[SerializeField] private Camera cam;
|
|
[SerializeField] private RawImage sourceImage;
|
|
[SerializeField] private RawImage receiveImage;
|
|
[SerializeField] private Transform rotateObject;
|
|
#pragma warning restore 0649
|
|
|
|
private RTCPeerConnection _pc1, _pc2;
|
|
private List<RTCRtpSender> pc1Senders;
|
|
private MediaStream videoStream, receiveStream;
|
|
private DelegateOnIceConnectionChange pc1OnIceConnectionChange;
|
|
private DelegateOnIceConnectionChange pc2OnIceConnectionChange;
|
|
private DelegateOnIceCandidate pc1OnIceCandidate;
|
|
private DelegateOnIceCandidate pc2OnIceCandidate;
|
|
private DelegateOnTrack pc2Ontrack;
|
|
private DelegateOnNegotiationNeeded pc1OnNegotiationNeeded;
|
|
private bool videoUpdateStarted;
|
|
|
|
private Dictionary<string, ulong?> bandwidthOptions =
|
|
new Dictionary<string, ulong?>()
|
|
{
|
|
{ "undefined", null },
|
|
{ "10000", 10000 },
|
|
{ "2000", 2000 },
|
|
{ "1000", 1000 },
|
|
{ "500", 500 },
|
|
{ "250", 250 },
|
|
{ "125", 125 },
|
|
};
|
|
|
|
private Dictionary<string, double> scaleResolutionDownOptions =
|
|
new Dictionary<string, double>()
|
|
{
|
|
{ "Not scaling", 1.0f },
|
|
{ "Down scale by 2.0", 2.0f },
|
|
{ "Down scale by 4.0", 4.0f },
|
|
{ "Down scale by 8.0", 8.0f },
|
|
{ "Down scale by 16.0", 16.0f }
|
|
};
|
|
|
|
private Dictionary<string, uint?> framerateOptions =
|
|
new Dictionary<string, uint?>
|
|
{
|
|
{ "undefined", null },
|
|
{ "90", 90 },
|
|
{ "60", 60 },
|
|
{ "30", 30 },
|
|
{ "20", 20 },
|
|
{ "10", 10 },
|
|
{ "5", 5 },
|
|
{ "0", 0 },
|
|
};
|
|
|
|
private void Awake()
|
|
{
|
|
bandwidthSelector.options = bandwidthOptions
|
|
.Select(pair => new Dropdown.OptionData { text = pair.Key })
|
|
.ToList();
|
|
bandwidthSelector.onValueChanged.AddListener(ChangeBandwitdh);
|
|
scaleResolutionDownSelector.options = scaleResolutionDownOptions
|
|
.Select(pair => new Dropdown.OptionData { text = pair.Key })
|
|
.ToList();
|
|
scaleResolutionDownSelector.onValueChanged.AddListener(ChangeScaleResolutionDown);
|
|
|
|
framerateSelector.options = framerateOptions
|
|
.Select(pair => new Dropdown.OptionData { text = pair.Key })
|
|
.ToList();
|
|
framerateSelector.onValueChanged.AddListener(ChangeFramerate);
|
|
|
|
callButton.onClick.AddListener(Call);
|
|
hangUpButton.onClick.AddListener(HangUp);
|
|
copyClipboard.onClick.AddListener(CopyClipboard);
|
|
receiveStream = new MediaStream();
|
|
}
|
|
|
|
private void Start()
|
|
{
|
|
pc1Senders = new List<RTCRtpSender>();
|
|
callButton.interactable = true;
|
|
hangUpButton.interactable = false;
|
|
bandwidthSelector.interactable = false;
|
|
scaleResolutionDownSelector.interactable = false;
|
|
|
|
pc1OnIceConnectionChange = state => { OnIceConnectionChange(_pc1, state); };
|
|
pc2OnIceConnectionChange = state => { OnIceConnectionChange(_pc2, state); };
|
|
pc1OnIceCandidate = candidate => { OnIceCandidate(_pc1, candidate); };
|
|
pc2OnIceCandidate = candidate => { OnIceCandidate(_pc2, candidate); };
|
|
pc2Ontrack = e =>
|
|
{
|
|
receiveStream.AddTrack(e.Track);
|
|
};
|
|
pc1OnNegotiationNeeded = () => { StartCoroutine(PeerNegotiationNeeded(_pc1)); };
|
|
|
|
receiveStream.OnAddTrack = e =>
|
|
{
|
|
if (e.Track is VideoStreamTrack track)
|
|
{
|
|
track.OnVideoReceived += OnVideoReceived;
|
|
}
|
|
};
|
|
}
|
|
|
|
private void OnVideoReceived(Texture tex)
|
|
{
|
|
receiveImage.texture = tex;
|
|
receiveImage.color = Color.white;
|
|
|
|
statsField.text +=
|
|
$"Video resolution: {tex.width}x{tex.height}" + Environment.NewLine;
|
|
if (autoScroll.isOn)
|
|
statsField.MoveTextEnd(false);
|
|
}
|
|
|
|
private void Update()
|
|
{
|
|
if (rotateObject != null)
|
|
{
|
|
float t = Time.deltaTime;
|
|
rotateObject.Rotate(100 * t, 200 * t, 300 * t);
|
|
}
|
|
}
|
|
|
|
private static RTCConfiguration GetSelectedSdpSemantics()
|
|
{
|
|
RTCConfiguration config = default;
|
|
config.iceServers = new[] { new RTCIceServer { urls = new[] { "stun:stun.l.google.com:19302" } } };
|
|
|
|
return config;
|
|
}
|
|
|
|
private void OnIceConnectionChange(RTCPeerConnection pc, RTCIceConnectionState state)
|
|
{
|
|
switch (state)
|
|
{
|
|
case RTCIceConnectionState.New:
|
|
Debug.Log($"{GetName(pc)} IceConnectionState: New");
|
|
break;
|
|
case RTCIceConnectionState.Checking:
|
|
Debug.Log($"{GetName(pc)} IceConnectionState: Checking");
|
|
break;
|
|
case RTCIceConnectionState.Closed:
|
|
Debug.Log($"{GetName(pc)} IceConnectionState: Closed");
|
|
break;
|
|
case RTCIceConnectionState.Completed:
|
|
Debug.Log($"{GetName(pc)} IceConnectionState: Completed");
|
|
break;
|
|
case RTCIceConnectionState.Connected:
|
|
Debug.Log($"{GetName(pc)} IceConnectionState: Connected");
|
|
break;
|
|
case RTCIceConnectionState.Disconnected:
|
|
Debug.Log($"{GetName(pc)} IceConnectionState: Disconnected");
|
|
break;
|
|
case RTCIceConnectionState.Failed:
|
|
Debug.Log($"{GetName(pc)} IceConnectionState: Failed");
|
|
break;
|
|
case RTCIceConnectionState.Max:
|
|
Debug.Log($"{GetName(pc)} IceConnectionState: Max");
|
|
break;
|
|
default:
|
|
throw new ArgumentOutOfRangeException(nameof(state), state, null);
|
|
}
|
|
}
|
|
|
|
IEnumerator PeerNegotiationNeeded(RTCPeerConnection pc)
|
|
{
|
|
var op = pc.CreateOffer();
|
|
yield return op;
|
|
|
|
if (!op.IsError)
|
|
{
|
|
if (pc.SignalingState != RTCSignalingState.Stable)
|
|
{
|
|
Debug.LogError($"{GetName(pc)} signaling state is not stable.");
|
|
yield break;
|
|
}
|
|
|
|
yield return StartCoroutine(OnCreateOfferSuccess(pc, op.Desc));
|
|
}
|
|
else
|
|
{
|
|
OnCreateSessionDescriptionError(op.Error);
|
|
}
|
|
}
|
|
|
|
private void AddTracks()
|
|
{
|
|
foreach (var track in videoStream.GetTracks())
|
|
{
|
|
pc1Senders.Add(_pc1.AddTrack(track, videoStream));
|
|
}
|
|
|
|
if (WebRTCSettings.UseVideoCodec != null)
|
|
{
|
|
var codecs = new[] { WebRTCSettings.UseVideoCodec };
|
|
foreach (var transceiver in _pc1.GetTransceivers())
|
|
{
|
|
if (pc1Senders.Contains(transceiver.Sender))
|
|
{
|
|
transceiver.SetCodecPreferences(codecs);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!videoUpdateStarted)
|
|
{
|
|
StartCoroutine(WebRTC.Update());
|
|
StartCoroutine(LoopStatsCoroutine());
|
|
videoUpdateStarted = true;
|
|
}
|
|
|
|
bandwidthSelector.interactable = false;
|
|
scaleResolutionDownSelector.interactable = false;
|
|
}
|
|
|
|
private void RemoveTracks()
|
|
{
|
|
foreach (var sender in pc1Senders)
|
|
{
|
|
_pc1.RemoveTrack(sender);
|
|
}
|
|
pc1Senders.Clear();
|
|
|
|
MediaStreamTrack[] tracks = receiveStream.GetTracks().ToArray();
|
|
foreach (var track in tracks)
|
|
{
|
|
receiveStream.RemoveTrack(track);
|
|
track.Dispose();
|
|
}
|
|
}
|
|
|
|
private void Call()
|
|
{
|
|
callButton.interactable = false;
|
|
hangUpButton.interactable = true;
|
|
bandwidthSelector.interactable = true;
|
|
scaleResolutionDownSelector.interactable = true;
|
|
statsField.text = string.Empty;
|
|
|
|
var configuration = GetSelectedSdpSemantics();
|
|
_pc1 = new RTCPeerConnection(ref configuration);
|
|
|
|
_pc1.OnIceCandidate = pc1OnIceCandidate;
|
|
_pc1.OnIceConnectionChange = pc1OnIceConnectionChange;
|
|
_pc1.OnNegotiationNeeded = pc1OnNegotiationNeeded;
|
|
_pc2 = new RTCPeerConnection(ref configuration);
|
|
|
|
_pc2.OnIceCandidate = pc2OnIceCandidate;
|
|
_pc2.OnIceConnectionChange = pc2OnIceConnectionChange;
|
|
_pc2.OnTrack = pc2Ontrack;
|
|
|
|
if (videoStream == null)
|
|
{
|
|
videoStream = cam.CaptureStream(WebRTCSettings.StreamSize.x, WebRTCSettings.StreamSize.y);
|
|
}
|
|
sourceImage.texture = cam.targetTexture;
|
|
sourceImage.color = Color.white;
|
|
|
|
AddTracks();
|
|
}
|
|
|
|
private void ChangeBandwitdh(int index)
|
|
{
|
|
if (_pc1 == null || _pc2 == null)
|
|
return;
|
|
ulong? bandwidth = bandwidthOptions.Values.ElementAt(index);
|
|
RTCRtpSender sender = _pc1.GetSenders().First();
|
|
RTCRtpSendParameters parameters = sender.GetParameters();
|
|
if (bandwidth == null)
|
|
{
|
|
parameters.encodings[0].maxBitrate = null;
|
|
parameters.encodings[0].minBitrate = null;
|
|
}
|
|
else
|
|
{
|
|
parameters.encodings[0].maxBitrate = bandwidth * 1000;
|
|
parameters.encodings[0].minBitrate = bandwidth * 1000;
|
|
}
|
|
|
|
RTCError error = sender.SetParameters(parameters);
|
|
if (error.errorType != RTCErrorType.None)
|
|
{
|
|
Debug.LogErrorFormat("RTCRtpSender.SetParameters failed {0}", error.errorType);
|
|
statsField.text += $"Failed change bandwidth to {bandwidth * 1000}{Environment.NewLine}";
|
|
bandwidthSelector.value = 0;
|
|
}
|
|
}
|
|
|
|
private void ChangeScaleResolutionDown(int index)
|
|
{
|
|
if (_pc1 == null || _pc2 == null)
|
|
return;
|
|
double scale = scaleResolutionDownOptions.Values.ElementAt(index);
|
|
RTCRtpSender sender = _pc1.GetSenders().First();
|
|
RTCRtpSendParameters parameters = sender.GetParameters();
|
|
parameters.encodings[0].scaleResolutionDownBy = scale;
|
|
|
|
RTCError error = sender.SetParameters(parameters);
|
|
if (error.errorType != RTCErrorType.None)
|
|
{
|
|
Debug.LogErrorFormat("RTCRtpSender.SetParameters failed {0}", error.errorType);
|
|
statsField.text +=
|
|
$"Failed scale down video resolution to " +
|
|
$"{(int)(WebRTCSettings.StreamSize.x / scale)}x{(int)(WebRTCSettings.StreamSize.y / scale)}{Environment.NewLine}";
|
|
scaleResolutionDownSelector.value = 0;
|
|
}
|
|
}
|
|
|
|
private void ChangeFramerate(int index)
|
|
{
|
|
if (_pc1 == null || _pc2 == null)
|
|
return;
|
|
uint? framerate = framerateOptions.Values.ElementAt(index);
|
|
RTCRtpSender sender = _pc1.GetSenders().First();
|
|
sender.SyncApplicationFramerate = false;
|
|
RTCRtpSendParameters parameters = sender.GetParameters();
|
|
parameters.encodings[0].maxFramerate = framerate;
|
|
RTCError error = sender.SetParameters(parameters);
|
|
if (error.errorType != RTCErrorType.None)
|
|
{
|
|
Debug.LogErrorFormat("RTCRtpSender.SetParameters failed {0}", error.errorType);
|
|
statsField.text +=
|
|
$"Failed maxFramerate to " +
|
|
$"{framerate}{Environment.NewLine}";
|
|
framerateSelector.value = 0;
|
|
}
|
|
}
|
|
|
|
private void HangUp()
|
|
{
|
|
RemoveTracks();
|
|
|
|
_pc1.Close();
|
|
_pc2.Close();
|
|
Debug.Log("Close local/remote peer connection");
|
|
_pc1.Dispose();
|
|
_pc2.Dispose();
|
|
_pc1 = null;
|
|
_pc2 = null;
|
|
callButton.interactable = true;
|
|
hangUpButton.interactable = false;
|
|
bandwidthSelector.interactable = false;
|
|
bandwidthSelector.value = 0;
|
|
scaleResolutionDownSelector.interactable = false;
|
|
scaleResolutionDownSelector.value = 0;
|
|
|
|
sourceImage.color = Color.black;
|
|
receiveImage.color = Color.black;
|
|
}
|
|
|
|
private void CopyClipboard()
|
|
{
|
|
#if UNITY_EDITOR
|
|
UnityEditor.EditorGUIUtility.systemCopyBuffer = statsField.text;
|
|
#endif
|
|
}
|
|
|
|
private void OnIceCandidate(RTCPeerConnection pc, RTCIceCandidate candidate)
|
|
{
|
|
GetOtherPc(pc).AddIceCandidate(candidate);
|
|
Debug.Log($"{GetName(pc)} ICE candidate:\n {candidate.Candidate}");
|
|
}
|
|
|
|
private string GetName(RTCPeerConnection pc)
|
|
{
|
|
return (pc == _pc1) ? "pc1" : "pc2";
|
|
}
|
|
|
|
private RTCPeerConnection GetOtherPc(RTCPeerConnection pc)
|
|
{
|
|
return (pc == _pc1) ? _pc2 : _pc1;
|
|
}
|
|
|
|
private IEnumerator LoopStatsCoroutine()
|
|
{
|
|
while (true)
|
|
{
|
|
yield return StartCoroutine(UpdateStatsCoroutine());
|
|
yield return new WaitForSeconds(1f);
|
|
}
|
|
}
|
|
|
|
private IEnumerator UpdateStatsCoroutine()
|
|
{
|
|
RTCRtpSender sender = pc1Senders.FirstOrDefault();
|
|
if (sender == null)
|
|
yield break;
|
|
RTCStatsReportAsyncOperation op = sender.GetStats();
|
|
yield return op;
|
|
if (op.IsError)
|
|
{
|
|
Debug.LogErrorFormat("RTCRtpSender.GetStats() is failed {0}", op.Error.errorType);
|
|
}
|
|
else
|
|
{
|
|
UpdateStatsPacketSize(op.Value);
|
|
}
|
|
}
|
|
|
|
private RTCStatsReport lastResult = null;
|
|
private void UpdateStatsPacketSize(RTCStatsReport res)
|
|
{
|
|
foreach (RTCStats stats in res.Stats.Values)
|
|
{
|
|
if (!(stats is RTCOutboundRTPStreamStats report))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
long now = report.Timestamp;
|
|
ulong bytes = report.bytesSent;
|
|
|
|
if (lastResult != null)
|
|
{
|
|
if (!lastResult.TryGetValue(report.Id, out RTCStats last))
|
|
continue;
|
|
|
|
var lastStats = last as RTCOutboundRTPStreamStats;
|
|
var duration = (double)(now - lastStats.Timestamp) / 1000000;
|
|
ulong bitrate = (ulong)(8 * (bytes - lastStats.bytesSent) / duration);
|
|
statsField.text += $"Bitrate: {bitrate}" + Environment.NewLine;
|
|
if (autoScroll.isOn)
|
|
statsField.MoveTextEnd(false);
|
|
}
|
|
|
|
}
|
|
lastResult = res;
|
|
}
|
|
|
|
private IEnumerator OnCreateOfferSuccess(RTCPeerConnection pc, RTCSessionDescription desc)
|
|
{
|
|
Debug.Log($"Offer from {GetName(pc)}\n{desc.sdp}");
|
|
Debug.Log($"{GetName(pc)} setLocalDescription start");
|
|
var op = pc.SetLocalDescription(ref desc);
|
|
yield return op;
|
|
|
|
if (!op.IsError)
|
|
{
|
|
OnSetLocalSuccess(pc);
|
|
}
|
|
else
|
|
{
|
|
var error = op.Error;
|
|
OnSetSessionDescriptionError(ref error);
|
|
}
|
|
|
|
var otherPc = GetOtherPc(pc);
|
|
Debug.Log($"{GetName(otherPc)} setRemoteDescription start");
|
|
var op2 = otherPc.SetRemoteDescription(ref desc);
|
|
yield return op2;
|
|
if (!op2.IsError)
|
|
{
|
|
OnSetRemoteSuccess(otherPc);
|
|
}
|
|
else
|
|
{
|
|
var error = op2.Error;
|
|
OnSetSessionDescriptionError(ref error);
|
|
}
|
|
Debug.Log($"{GetName(otherPc)} createAnswer start");
|
|
// Since the 'remote' side has no media stream we need
|
|
// to pass in the right constraints in order for it to
|
|
// accept the incoming offer of audio and video.
|
|
|
|
var op3 = otherPc.CreateAnswer();
|
|
yield return op3;
|
|
if (!op3.IsError)
|
|
{
|
|
yield return OnCreateAnswerSuccess(otherPc, op3.Desc);
|
|
}
|
|
else
|
|
{
|
|
OnCreateSessionDescriptionError(op3.Error);
|
|
}
|
|
}
|
|
|
|
private void OnSetLocalSuccess(RTCPeerConnection pc)
|
|
{
|
|
Debug.Log($"{GetName(pc)} SetLocalDescription complete");
|
|
}
|
|
|
|
static void OnSetSessionDescriptionError(ref RTCError error)
|
|
{
|
|
Debug.LogError($"Error Detail Type: {error.message}");
|
|
}
|
|
|
|
private void OnSetRemoteSuccess(RTCPeerConnection pc)
|
|
{
|
|
Debug.Log($"{GetName(pc)} SetRemoteDescription complete");
|
|
|
|
if (pc == _pc1)
|
|
{
|
|
bandwidthSelector.interactable = true;
|
|
scaleResolutionDownSelector.interactable = true;
|
|
}
|
|
}
|
|
|
|
IEnumerator OnCreateAnswerSuccess(RTCPeerConnection pc, RTCSessionDescription desc)
|
|
{
|
|
Debug.Log($"Answer from {GetName(pc)}:\n{desc.sdp}");
|
|
Debug.Log($"{GetName(pc)} setLocalDescription start");
|
|
var op = pc.SetLocalDescription(ref desc);
|
|
yield return op;
|
|
|
|
if (!op.IsError)
|
|
{
|
|
OnSetLocalSuccess(pc);
|
|
}
|
|
else
|
|
{
|
|
var error = op.Error;
|
|
OnSetSessionDescriptionError(ref error);
|
|
}
|
|
|
|
var otherPc = GetOtherPc(pc);
|
|
Debug.Log($"{GetName(otherPc)} setRemoteDescription start");
|
|
|
|
var op2 = otherPc.SetRemoteDescription(ref desc);
|
|
yield return op2;
|
|
if (!op2.IsError)
|
|
{
|
|
OnSetRemoteSuccess(otherPc);
|
|
}
|
|
else
|
|
{
|
|
var error = op2.Error;
|
|
OnSetSessionDescriptionError(ref error);
|
|
}
|
|
}
|
|
|
|
private static void OnCreateSessionDescriptionError(RTCError error)
|
|
{
|
|
Debug.LogError($"Error Detail Type: {error.message}");
|
|
}
|
|
}
|