public static void AvccToAnnexb4(AvccHeader Header, byte[] Packet, System.Action <byte[]> EnumAnnexBPacket)
{
System.Action <byte[]> EnumPacket = (RawPacket) =>
{
// ignore non iframes
/* gr: why was I ignoring these?
* var nt = GetNaluType(RawPacket[0]);
* if (nt != NaluType.IFrame && nt != NaluType.PFrame)
* {
* return;
* }
*/
//Debug.Log("Found " + nt + " x" + RawPacket.Length + "bytes");
var AnnexPacketData = new List <byte>();
// https://github.com/SoylentGraham/SoyLib/blob/master/src/SoyH264.cpp#L328
AnnexPacketData.Add(0);
AnnexPacketData.Add(0);
AnnexPacketData.Add(0);
AnnexPacketData.Add(1);
//AnnexPacketData.Add(GetNaluTypeByte(NaluType.AccessUnitDelimiter));
//AnnexPacketData.Add(0xf0);
AnnexPacketData.AddRange(RawPacket);
EnumAnnexBPacket(AnnexPacketData.ToArray());
};
SplitPacket_Avcc(Header, Packet, EnumPacket);
}
// split avcc packets
public static AvccHeader ParseAvccHeader(byte[] Data)
{
// https://stackoverflow.com/a/24890903/355753
int Offset = 0;
/*var Version =*/ Get8(Data, ref Offset);
var Profile = Get8(Data, ref Offset);
/*var Compatibility =*/ Get8(Data, ref Offset);
var Level8 = Get8(Data, ref Offset);
var ReservedAndNaluLengthMinusOne = Get8(Data, ref Offset);
var ReservedAndSpsCount = Get8(Data, ref Offset);
var NaluLengthMinusOne = ReservedAndNaluLengthMinusOne & ((1 << 2) - 1);
var SpsCount = ReservedAndSpsCount & ((1 << 5) - 1);
var Header = new AvccHeader(Profile, Level8, NaluLengthMinusOne);
for (int i = 0; i < SpsCount; i++)
{
var SpsSize = Get16(Data, ref Offset);
var Sps = GetN(Data, SpsSize, ref Offset);
Header.SPSs.Add(Sps);
}
var PpsCount = Get8(Data, ref Offset);
for (int i = 0; i < PpsCount; i++)
{
var PpsSize = Get16(Data, ref Offset);
var Pps = GetN(Data, PpsSize, ref Offset);
Header.PPSs.Add(Pps);
}
return(Header);
}
public static void SplitPacket_Avcc(AvccHeader Header, byte[] Packet, System.Action <byte[]> EnumPacket)
{
int Offset = 0;
while (Offset < Packet.Length)
{
// read length
var Length = GetLength(Packet, Header.NaluLength, ref Offset);
var Data = GetN(Packet, Length, ref Offset);
EnumPacket(Data);
}
}
// like ParseAvccHeader but decodes the minimum to get profile & level
public static AvccHeader ParseAvccProfile(byte[] Data)
{
// https://stackoverflow.com/a/24890903/355753
int Offset = 0;
/*var Version =*/
Get8(Data, ref Offset);
var Profile = Get8(Data, ref Offset);
/*var Compatibility =*/
Get8(Data, ref Offset);
var Level8 = Get8(Data, ref Offset);
var ReservedAndNaluLengthMinusOne = Get8(Data, ref Offset);
var ReservedAndSpsCount = Get8(Data, ref Offset);
var NaluLengthMinusOne = ReservedAndNaluLengthMinusOne & ((1 << 2) - 1);
var SpsCount = ReservedAndSpsCount & ((1 << 5) - 1);
var Header = new AvccHeader(Profile, Level8, NaluLengthMinusOne);
return(Header);
}
