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Support more incoming RTP packets types

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This commit is contained in:
RogueException
2017-04-08 02:34:12 -03:00
parent b62c9dc315
commit 22a7b7dbba
1 changed files with 26 additions and 6 deletions
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32
src/Discord.Net.WebSocket/Audio/Streams/RTPReadStream.cs
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@@ -29,8 +29,7 @@ namespace Discord.Audio.Streams
{
cancelToken.ThrowIfCancellationRequested();
if (buffer[offset + 0] != 0x80 || buffer[offset + 1] != 0x78)
return;
int headerSize = GetHeaderSize(buffer, offset);
ushort seq = (ushort)((buffer[offset + 2] << 8) |
(buffer[offset + 3] << 0));
@@ -41,16 +40,21 @@ namespace Discord.Audio.Streams
(buffer[offset + 7] << 0));
_queue.WriteHeader(seq, timestamp);
await (_next ?? _queue as Stream).WriteAsync(buffer, offset + 12, count - 12, cancelToken).ConfigureAwait(false);
await (_next ?? _queue as Stream).WriteAsync(buffer, offset + headerSize, count - headerSize, cancelToken).ConfigureAwait(false);
}
public static bool TryReadSsrc(byte[] buffer, int offset, out uint ssrc)
{
ssrc = 0;
if (buffer.Length - offset < 12)
{
ssrc = 0;
return false;
}
int version = (buffer[offset + 0] & 0b1100_0000) >> 6;
if (version != 2)
return false;
int type = (buffer[offset + 1] & 0b01111_1111);
if (type != 120) //Dynamic Discord type
return false;
ssrc = (uint)((buffer[offset + 8] << 24) |
(buffer[offset + 9] << 16) |
@@ -58,5 +62,21 @@ namespace Discord.Audio.Streams
(buffer[offset + 11] << 0));
return true;
}
public static int GetHeaderSize(byte[] buffer, int offset)
{
byte headerByte = buffer[offset];
bool extension = (headerByte & 0b0001_0000) != 0;
int csics = (headerByte & 0b0000_1111) >> 4;
if (!extension)
return 12 + csics * 4;
int extensionOffset = offset + 12 + (csics * 4);
int extensionLength =
(buffer[extensionOffset + 2] << 8) |
(buffer[extensionOffset + 3]);
return extensionOffset + 4 + (extensionLength * 4);
}
}
}