public void ReadBits_ReadSeveralBits_ValidResult()
{
var bytes = new byte[] { 0x31 };
var reader = new BitStreamReader();
reader.ReInitialize(new ArraySegment <byte>(bytes));
int bits = reader.ReadBits(5);
Assert.AreEqual(6, bits);
}
public void ReadUe_TestCode_ValidResult()
{
const int testCode = 4;
var bytes = new byte[] { (testCode + 1) << 3 };
var reader = new BitStreamReader();
reader.ReInitialize(new ArraySegment <byte>(bytes));
int code = reader.ReadUe();
Assert.AreEqual(testCode, code);
}
public override void Parse(TimeSpan timeOffset, ArraySegment <byte> byteSegment, bool markerBit)
{
int auHeadersBitLength = BigEndianConverter.ReadUInt16(byteSegment.Array, byteSegment.Offset);
int auHeadersLengthBytes = (auHeadersBitLength + 7) / 8;
int headerBitSize = _codecInfo.SizeLength + _codecInfo.IndexLength;
int audioBitsAvail = auHeadersBitLength - headerBitSize;
if (audioBitsAvail < 0 || headerBitSize <= 0)
{
return;
}
int framesCount = 1 + audioBitsAvail / (_codecInfo.SizeLength + _codecInfo.IndexDeltaLength);
_bitStreamReader.ReInitialize(byteSegment.SubSegment(2));
int offset = byteSegment.Offset + auHeadersLengthBytes;
for (int i = 0; i < framesCount; ++i)
{
int frameSize = _bitStreamReader.ReadBits(_codecInfo.SizeLength);
if (i == 0)
{
_bitStreamReader.ReadBits(_codecInfo.IndexLength);
}
else if (_codecInfo.IndexDeltaLength != 0)
{
_bitStreamReader.ReadBits(_codecInfo.IndexDeltaLength);
}
Debug.Assert(byteSegment.Array != null, "byteSegment.Array != null");
var frameBytes = new ArraySegment <byte>(byteSegment.Array, offset, frameSize);
DateTime timestamp = GetFrameTimestamp(timeOffset);
var aacFrame = new RawAACFrame(timestamp, frameBytes,
new ArraySegment <byte>(_codecInfo.ConfigBytes));
OnFrameGenerated(aacFrame);
offset += frameSize;
}
}
public void ReadBit_ReadSeveralBits_ValidResult()
{
var bytes = new byte[] { 0x31 };
var reader = new BitStreamReader();
reader.ReInitialize(new ArraySegment <byte>(bytes));
int bit1 = reader.ReadBit();
int bit2 = reader.ReadBit();
int bit3 = reader.ReadBit();
int bit4 = reader.ReadBit();
int bit5 = reader.ReadBit();
Assert.AreEqual(0, bit1);
Assert.AreEqual(0, bit2);
Assert.AreEqual(1, bit3);
Assert.AreEqual(1, bit4);
Assert.AreEqual(0, bit5);
}
private void ProcessSpsOrPps(ArraySegment <byte> byteSegment, bool hasStartMarker, int offset,
Dictionary <int, byte[]> idToBytesMap)
{
_bitStreamReader.ReInitialize(hasStartMarker
? byteSegment.SubSegment(RawH264Frame.StartMarker.Length + offset)
: byteSegment.SubSegment(offset));
int id = _bitStreamReader.ReadUe();
if (id == -1)
{
return;
}
if (hasStartMarker)
{
byteSegment = byteSegment.SubSegment(RawH264Frame.StartMarker.Length);
}
if (TryUpdateSpsOrPps(byteSegment, id, idToBytesMap))
{
_updateSpsPpsBytes = true;
}
}
