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); }
// 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); }