internal override bool Parse(WZBinaryReader r, bool initial, out byte[] result) { r.Skip(1); int blockLen = r.ReadWZInt(); // sound data length Duration = r.ReadWZInt(); // sound duration r.Skip(1 + 16 + 16 + 2); // Byte, Major type GUID, Sub type GUID, byte, byte Guid fmt = new Guid(r.ReadBytes(16)); if (fmt == WaveFormatExGuid) { if (initial) { r.Skip(r.ReadWZInt()); } else { _header = r.ReadBytes(r.ReadWZInt()); if (_header.Length != 18 + GetCbSize(_header)) { _header = null; // TODO FIXME figure out what those gibberish headers are } // But in any case they don't affect our uses // File._aes.DecryptBytesAsciiKey(_header); //if (_header.Length != 18 + GetCbSize(_header)) // Debug.WriteLine("Failed to parse WAVEFORMATEX header at node {0}", Path); //throw new WZException($"Failed to parse WAVEFORMATEX header at node {Path}"); } } else if (fmt != NoHeaderGuid) { Debug.WriteLine("New format guid {0} @ {1}", fmt, Path); } if (!initial || (File._flag & WZReadSelection.EagerParseAudio) == WZReadSelection.EagerParseAudio) { result = r.ReadBytes(blockLen); return(true); } else { r.Skip(blockLen); result = null; return(false); } }
internal override bool Parse(WZBinaryReader br, bool initial, out Bitmap result) { bool skip = (File._flag & WZReadSelection.NeverParseCanvas) == WZReadSelection.NeverParseCanvas, eager = (File._flag & WZReadSelection.EagerParseCanvas) == WZReadSelection.EagerParseCanvas; if (initial) { if (skip && eager) { result = null; return(WZUtil.Die <bool>("Both NeverParseCanvas and EagerParseCanvas are set.")); } br.Skip(1); if (br.ReadByte() == 1) { br.Skip(2); List <WZObject> l = WZExtendedParser.ParsePropertyList(br, this, Image, Image._encrypted); if (ChildCount == 0) { l.ForEach(Add); } } _afterChildren = br.Position; } else { br.Position = _afterChildren; } int width = br.ReadWZInt(); // width int height = br.ReadWZInt(); // height int format1 = br.ReadWZInt(); // format 1 int scale = br.ReadByte(); // format 2 br.Skip(4); int blockLen = br.ReadInt32(); if ((initial || skip) && !eager) { br.Skip(blockLen); // block Len & png data result = null; return(skip); } else { br.Skip(1); byte[] header = br.ReadBytes(2); // FLG bit 5 indicates the presence of a preset dictionary // seems like MS doesn't use that? if ((header[1] & 0x20) != 0) { Debug.WriteLine("Warning; zlib with preset dictionary"); result = null; br.Skip(blockLen - 3); return(true); } // zlib header: CMF (byte), FLG (byte) byte[] pngData = br.ReadBytes(blockLen - 3); result = ParsePNG(width, height, format1, scale, // CMF least significant bits 0 to 3 are compression method. only 8 is valid (header[0] & 0xF) != 8 || // CMF << 8 | FLG i.e. header read as a big-endian short is a multiple of 31 (header[0] << 8 | header[1]) % 31 != 0 ? DecryptPNG(pngData) : pngData); return(true); } }