public override bool Parse(QtParser parser)
{
if (!base.Parse(parser))
{
return(false);
}
parser.GetUInt(Attribute.Version, "{0:X8}");
// TODO: the sequence of descriptors is taken (mostly) from ffmpeg
// TODO: verify that this is the actual sequence seen in (all) 3GPP files
BaseDescriptor descriptor = ReadDescriptor(parser);
if (descriptor.Tag == DescriptorClassTag.ES_DescrTag)
{
parser.GetUShort(); // ID
parser.GetByte(); // priority
}
else
{
parser.GetUShort(); // ID
}
descriptor = ReadDescriptor(parser);
if (descriptor.Tag == DescriptorClassTag.DecoderConfigDescrTag)
{
parser.GetByte(Attribute.ObjectTypeIndication); // 0x20 Visual ISO/IEC 14496-2
parser.GetByte(Attribute.StreamType);
parser.GetThreeBytes(Attribute.BufferSizeDB); // 3 bytes
parser.GetUInt(Attribute.MaxBitrate);
parser.GetUInt(Attribute.AvgBitrate);
descriptor = ReadDescriptor(parser);
if ((parser.Position + descriptor.Length) > parser.Length)
{
return(false);
}
if (descriptor.Tag == DescriptorClassTag.DecSpecificInfoTag)
{
// Extra data can be empty (0 bytes)
if (descriptor.Length > 0)
{
ExtraData = parser.GetDataPacket(parser.Position, descriptor.Length);
}
Attributes.Add(new FormattedAttribute <Attribute, long>(Attribute.DecSpecificInfoSize, descriptor.Length));
}
parser.Position += Math.Min(descriptor.Length, parser.Length - parser.Position);
}
return(this.Valid);
}
public override bool Parse(QtParser parser)
{
if (!base.Parse(parser))
{
return(false);
}
if (parser.BytesRemaining > 255)
{
Valid = false;
string value = string.Format("{0} descriptor bytes found", parser.BytesRemaining);
parser.AddAttribute(new FormattedAttribute <Attribute, string>(Attribute.Descriptor, value));
parser.GetDataPacket(parser.Position, (long)parser.BytesRemaining);
parser.Position += (long)parser.BytesRemaining;
}
return(Valid);
}
// for (i=0; i< numOfSequenceParameterSets; i++) {
// unsigned int(16) sequenceParameterSetLength ;
// bit(8*sequenceParameterSetLength) sequenceParameterSetNALUnit;
// }
//
// for (i=0; i< numOfPictureParameterSets; i++) {
// unsigned int(16) pictureParameterSetLength;
// bit(8*pictureParameterSetLength) pictureParameterSetNALUnit;
// }
private static IDataPacket CreateNalUnit(QtParser parser, byte setCount, Attribute attribute)
{
long beginOffset = parser.Position;
int totalSetLength = 0;
for (int i = 0; i < setCount; i++)
{
ushort setLength = parser.GetUShort();
parser.Position += setLength;
totalSetLength += setLength + sizeof(ushort);
}
if (totalSetLength > 0)
{
parser.Position = beginOffset;
parser.GetHexDump <Attribute>(attribute, totalSetLength);
return(parser.GetDataPacket(beginOffset, totalSetLength));
}
return(null);
}
