private void ProcessVideo(byte[] payload, byte[] spsPps, long pts, int widthSource, int heightSource)
{
int nalu_size = 0;
while (nalu_size < payload.Length)
{
int nc_len = (payload[nalu_size + 3] & 0xFF) | ((payload[nalu_size + 2] & 0xFF) << 8) | ((payload[nalu_size + 1] & 0xFF) << 16) | ((payload[nalu_size] & 0xFF) << 24);
if (nc_len > 0)
{
payload[nalu_size] = 0;
payload[nalu_size + 1] = 0;
payload[nalu_size + 2] = 0;
payload[nalu_size + 3] = 1;
nalu_size += nc_len + 4;
}
if (payload.Length - nc_len > 4)
{
return;
}
}
if (spsPps.Length != 0)
{
var h264Data = new H264Data();
h264Data.FrameType = payload[4] & 0x1f;
if (h264Data.FrameType == 5)
{
var payloadOut = (byte[])Array.CreateInstance(typeof(byte), payload.Length + spsPps.Length);
Array.Copy(spsPps, 0, payloadOut, 0, spsPps.Length);
Array.Copy(payload, 0, payloadOut, spsPps.Length, payload.Length);
h264Data.Data = payloadOut;
h264Data.Length = payload.Length + spsPps.Length;
// Release payload
payload = null;
}
else
{
h264Data.Data = payload;
h264Data.Length = payload.Length;
}
h264Data.Pts = pts;
h264Data.Width = widthSource;
h264Data.Height = heightSource;
_receiver.OnData(h264Data);
}
}
public override async Task OnDataReceivedAsync(Request request, Response response, CancellationToken cancellationToken)
{
// INFO: We must use the same ED25519 KeyPair created inside AirTunesListener
// INFO: We must use the same sessionId to retrieve
var session = await SessionManager.Current.GetSessionAsync(_sessionId);
if (request.Type == RequestType.GET && "/server-info".Equals(request.Path, StringComparison.OrdinalIgnoreCase))
{
var xml = @"<?xml version=""1.0"" encoding=""UTF-8""?>
<!DOCTYPE plist PUBLIC ""-//Apple//DTD PLIST 1.0//EN"" ""http://www.apple.com/DTDs/PropertyList-1.0.dtd"">
<plist version=""1.0"">
<dict>
<key>deviceid</key>
<string>10:20:30:40:50:60</string>
<key>features</key>
<integer>0x5A7FFFF7,0x1E</integer>
<key>model</key>
<string>AppleTV5,3</string>
<key>protovers</key>
<string>1.0</string>
<key>srcvers</key>
<string>220.68</string>
</dict>
</plist>";
var bytes = Encoding.ASCII.GetBytes(xml);
await response.WriteAsync(bytes);
}
if (request.Type == RequestType.POST && "/pair-verify".Equals(request.Path, StringComparison.OrdinalIgnoreCase))
{
using (var mem = new MemoryStream(request.Body))
using (var reader = new BinaryReader(mem))
{
// Request: 68 bytes (the first 4 bytes are 01 00 00 00)
// Client request packet remaining 64 bytes of content
// 01 00 00 00 -> use 01 as flag to check type of verify
// If flag is 1:
// 32 bytes ecdh_their
// 32 bytes ed_their
// If flag is 0:
// 64 bytes signature
var flag = reader.ReadByte();
if (flag > 0)
{
reader.ReadBytes(3);
session.EcdhTheirs = reader.ReadBytes(32);
session.EdTheirs = reader.ReadBytes(32);
var curve25519 = Curve25519.getInstance(Curve25519.BEST);
var curve25519KeyPair = curve25519.generateKeyPair();
session.EcdhOurs = curve25519KeyPair.getPublicKey();
var ecdhPrivateKey = curve25519KeyPair.getPrivateKey();
session.EcdhShared = curve25519.calculateAgreement(ecdhPrivateKey, session.EcdhTheirs);
var aesCtr128Encrypt = Utilities.InitializeChiper(session.EcdhShared);
byte[] dataToSign = new byte[64];
Array.Copy(session.EcdhOurs, 0, dataToSign, 0, 32);
Array.Copy(session.EcdhTheirs, 0, dataToSign, 32, 32);
var signature = Chaos.NaCl.Ed25519.Sign(dataToSign, _expandedPrivateKey);
byte[] encryptedSignature = aesCtr128Encrypt.DoFinal(signature);
byte[] output = new byte[session.EcdhOurs.Length + encryptedSignature.Length];
Array.Copy(session.EcdhOurs, 0, output, 0, session.EcdhOurs.Length);
Array.Copy(encryptedSignature, 0, output, session.EcdhOurs.Length, encryptedSignature.Length);
response.Headers.Add("Content-Type", "application/octet-stream");
await response.WriteAsync(output, 0, output.Length).ConfigureAwait(false);
}
else
{
reader.ReadBytes(3);
var signature = reader.ReadBytes(64);
var aesCtr128Encrypt = Utilities.InitializeChiper(session.EcdhShared);
var signatureBuffer = new byte[64];
signatureBuffer = aesCtr128Encrypt.ProcessBytes(signatureBuffer);
signatureBuffer = aesCtr128Encrypt.DoFinal(signature);
byte[] messageBuffer = new byte[64];
Array.Copy(session.EcdhTheirs, 0, messageBuffer, 0, 32);
Array.Copy(session.EcdhOurs, 0, messageBuffer, 32, 32);
session.PairVerified = Chaos.NaCl.Ed25519.Verify(signatureBuffer, messageBuffer, session.EdTheirs);
Console.WriteLine($"PairVerified: {session.PairVerified}");
}
}
}
if (request.Type == RequestType.POST && "/play".Equals(request.Path, StringComparison.OrdinalIgnoreCase))
{
using (var mem = new MemoryStream(request.Body))
using (var reader = new StreamReader(mem, Encoding.ASCII))
{
var data = await reader.ReadToEndAsync().ConfigureAwait(false);
var dict = data.Split('\n', StringSplitOptions.RemoveEmptyEntries).Select(kv =>
{
var splitted = kv.Split(": ", StringSplitOptions.RemoveEmptyEntries).Select(t => t.Trim()).ToArray();
return(new KeyValuePair <string, string>(splitted[0], splitted[1]));
}).ToDictionary(k => k.Key, v => v.Value);
var startAt = dict.TryGetValue("Start-Position", out string dStartAt) ? decimal.Parse(dStartAt) : 0M;
var url = dict.TryGetValue("Content-Location", out string dUrl) ? dUrl : throw new ArgumentNullException(nameof(dUrl));
// DO SOMETHING HERE...
var from = 0;
using (var client = new HttpClient())
{
var to = from + 1024;
client.DefaultRequestHeaders.Add("Range", $"bytes={from}-{to}");
var result = await client.GetAsync(url, HttpCompletionOption.ResponseHeadersRead).ConfigureAwait(false);
if (result.IsSuccessStatusCode)
{
var length = result.Headers.TryGetValues("Content-Length", out IEnumerable <string> cLength) ? int.Parse(cLength.FirstOrDefault() ?? "0") : 0;
var accept = result.Headers.TryGetValues("Accept-Ranges", out IEnumerable <string> cAccept) ? cAccept.FirstOrDefault() : null;
var bytes = await result.Content.ReadAsByteArrayAsync().ConfigureAwait(false);
_receiver.OnData(new H264Data
{
Data = bytes
});
}
from = to;
}
}
}
}
