public override bool Parse(QtParser parser)
{
if (!base.Parse(parser))
{
return(false);
}
parser.GetUShort(Attribute.SubSequenceIdentifer);
parser.GetByte(Attribute.LayerNumber);
byte flags = parser.GetByte();
bool durationFlag = (flags & 0x80) == 0x80;
bool avgRateFlag = (flags & 0x40) == 0x40;
byte reserved = (byte)(flags & 0x3F);
parser.AddAttribute(new FormattedAttribute <Attribute, bool>(Attribute.DurationFlag, durationFlag));
parser.AddAttribute(new FormattedAttribute <Attribute, bool>(Attribute.AvgRateFlag, avgRateFlag));
parser.AddAttribute(new FormattedAttribute <Attribute, byte>(Attribute.Reserved, reserved));
parser.CheckAttribute(Attribute.Reserved, reserved == 0, false);
if (durationFlag)
{
parser.GetUInt(Attribute.Duration);
}
if (avgRateFlag)
{
parser.GetByte(Attribute.AccurateStatisticsFlag);
parser.GetUShort(Attribute.AvgBitRate);
parser.GetUShort(Attribute.AvgFrameRate);
}
parser.GetTable(Attribute.DependencyInfo, Attribute.NumReferences, NumberOfEntriesType.Byte, 32, () => new DependencyInfo(), parser.BytesRemaining);
return(Valid);
}
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);
}
parser.GetByte(Attribute.LayerNumber);
parser.GetByte(Attribute.AccurateStatisticsFlag);
parser.GetUShort(Attribute.AvgBitRate);
parser.GetUShort(Attribute.AvgFrameRate);
return(Valid);
}
/// <summary>
/// Reads a MPEG-4 descriptor.
/// </summary>
/// <remarks>defined in ISO/IEC 14496-1 �2.2</remarks>
private static BaseDescriptor ReadDescriptor(QtParser parser)
{
DescriptorClassTag tag = (DescriptorClassTag)parser.GetByte();
// Expandable length [see ISO/IEC 14496-1 �3.3]
int count = 4;
uint nextByte = parser.GetByte();
uint sizeOfInstance = (nextByte & 0x7F);
while ((nextByte & 0x80) != 0 && --count > 0)
{
nextByte = parser.GetByte();
sizeOfInstance = (sizeOfInstance << 7) | (nextByte & 0x7F);
}
return(new BaseDescriptor(tag, sizeOfInstance));
}
public override bool Parse(QtParser parser)
{
uint flags = 0;
for (int i = 0; i < _size; i++)
{
flags = (flags << 8) | parser.GetByte();
}
foreach (TFlag flag in Enum.GetValues(typeof(TFlag)))
{
parser.AddAttribute(new FormattedAttribute <TFlag, bool>(flag, IsFlagSet(flags, flag)));
}
this.TypedValue = flags;
return(this.Valid);
}
public override bool Parse(QtParser parser)
{
if (!base.Parse(parser))
{
return(false);
}
// Reserved (6x byte)
for (int i = 0; i < 6; i++)
{
parser.GetByte();
}
parser.GetUShort(Attribute.ReferenceIndex);
parser.GetUShort(Attribute.PreDefined1);
parser.GetUShort(Attribute.Reserved1);
return(Valid);
}
// See QuickTime File Format Specification, 2010-08-03, pg.1
private static void ParseTcmiAtom(QtParser parser, uint size)
{
long tcmiPosition = (parser.Position - 4);
parser.AddAttribute(new FormattedAttribute <QtAtom.Attribute, uint>(QtAtom.Attribute.Size, size));
uint type = parser.GetFourCC(QtAtom.Attribute.Type);
parser.CheckAttribute(QtAtom.Attribute.Type, type == Tcmi, false);
parser.GetByte(QtAtom.Attribute.Version);
parser.GetThreeBytes(QtAtom.Attribute.Flags);
parser.GetUShort(Attribute.TextFont);
parser.GetUShort(Attribute.TextFace);
parser.GetUShort(Attribute.TextSize);
parser.GetUShort(Attribute.TcmiReserved);
parser.Parse(new Color(Attribute.TextColor));
parser.Parse(new Color(Attribute.BackgroundColor));
parser.GetPascalString(Attribute.FontName, 0);
parser.CheckAttribute(QtAtom.Attribute.Size, size == (parser.Position - tcmiPosition), false);
}
public override bool Parse(QtParser parser)
{
if (!base.Parse(parser))
{
return(false);
}
if (!CheckComponentSubType(ComponentSubType.tmcd))
{
Valid = false;
return(Valid);
}
uint reserved = parser.GetUInt();
if (reserved == 0)
{
parser.AddAttribute(new FormattedAttribute <QtSampleDescriptionAtom.Attribute, int>(QtSampleDescriptionAtom.Attribute.Reserved, (int)reserved));
parser.GetShort(QtSampleDescriptionAtom.Attribute.Reserved);
parser.GetShort(QtSampleDescriptionAtom.Attribute.DataReferenceIndex);
reserved = parser.GetUInt(Attribute.Reserved1);
parser.CheckAttribute(Attribute.Reserved1, reserved == 0, true);
parser.Parse(new Flags());
parser.GetInt(Attribute.TimeScale);
parser.GetInt(Attribute.FrameDuration);
parser.GetByte(Attribute.NumberOfFrames);
reserved = parser.GetThreeBytes(Attribute.Reserved2);
parser.CheckAttribute(Attribute.Reserved2, reserved == 0, false);
if (parser.BytesRemaining > 0)
{
parser.GetHexDump(QtAtom.Attribute.AdditionalData, (int)parser.BytesRemaining);
}
}
else
{
ParseTcmiAtom(parser, reserved);
}
return(Valid);
}
public override bool Parse(QtParser parser)
{
if (!base.Parse(parser))
{
return(false);
}
byte version = parser.GetByte(Attribute.ConfigurationVersion);
if (!CheckValue(version, 1))
{
return(false);
}
parser.GetByte(Attribute.AvcProfileIndication);
parser.GetByte(Attribute.ProfileCompatibility);
parser.GetByte(Attribute.AvcLevelIndication);
// bit(6) reserved = ‘111111’b;
// unsigned int(2) lengthSizeMinusOne;
byte lengthSizeMinusOne = parser.GetByte();
if (!CheckReservedBits(lengthSizeMinusOne, 0xFC))
{
return(false);
}
lengthSizeMinusOne &= 0x03;
parser.AddAttribute(new FormattedAttribute <Attribute, byte>(Attribute.LengthSizeMinusOne, lengthSizeMinusOne));
// bit(3) reserved = ‘111’b;
// unsigned int(5) numOfSequenceParameterSets;
byte numOfSequenceParameterSets = parser.GetByte();
if (((QtAtom)Parent).HeaderName == AtomName.AvcParameterSampleEntry)
{
if (!CheckValue(numOfSequenceParameterSets, 0))
{
return(false);
}
parser.AddAttribute(new FormattedAttribute <Attribute, byte>(Attribute.NumOfSequenceParameterSets, numOfSequenceParameterSets));
}
else
{
// Check the three msb
//FIXME: if (!CheckReservedBits(numOfSequenceParameterSets, 0xE0)) return false;
numOfSequenceParameterSets &= 0x1F; // remove the three msb
parser.AddAttribute(new FormattedAttribute <Attribute, byte>(Attribute.NumOfSequenceParameterSets, numOfSequenceParameterSets));
}
SequenceParameterSets = CreateNalUnit(parser, numOfSequenceParameterSets, Attribute.SequenceParameterSets);
byte numOfPictureParameterSets = parser.GetByte(Attribute.NumOfPictureParameterSets);
if (((QtAtom)Parent).HeaderName == AtomName.AvcParameterSampleEntry)
{
if (!CheckValue(numOfPictureParameterSets, 0))
{
return(false);
}
}
PictureParameterSets = CreateNalUnit(parser, numOfPictureParameterSets, Attribute.PictureParameterSets);
return(Valid);
}
