public static ThumbsFile read(StreamAccessor accessor)
{
ThumbsFile r = new ThumbsFile();
Riff::RiffFile riff = Riff::RiffFile.FromStream(accessor.Stream, true);
StreamAccessor ac;
foreach (Riff::Chunk chunk in riff.EnumerateChunksByName("head"))
{
ac = new StreamAccessor(chunk.Stream);
if (VERSION != ac.ReadInt32(EncodingType.I4))
{
throw new System.ApplicationException("ファイルフォーマットの version が異なります。");
}
break;
}
foreach (Riff::Chunk chunk in riff.EnumerateChunksByName("thms"))
{
r.thumbs = chunk.GetContent <ImageCollection>();
break;
}
foreach (Riff::Chunk chunk in riff.EnumerateChunksByName("dirs"))
{
ac = new StreamAccessor(chunk.Stream);
r.dirs = ac.Read <DirectoryCollection>();
break;
}
riff.Close();
r.read_initialize();
return(r);
}
private int ReadTagHeader(StreamAccessor accessor, out bool unsync)
{
const string DIFF_VERSION = @"読み込もうとしている ID3 タグの版は 2.{0}.{1}です。
この関数では 2.3.0 の読み取りにしか対応していません。";
//-------------------------------------------------------
if (accessor.ReadString(EncodingType.CC3) != "ID3")
{
throw new FileFormatException("読み込もうとしているバイナリストリームは ID3 タグではありません。");
}
byte minor = accessor.ReadByte(EncodingType.U1);
byte revision = accessor.ReadByte(EncodingType.U1);
if (minor != 3 || revision != 0)
{
throw new FileFormatException(string.Format(DIFF_VERSION, minor, revision));
}
byte flags = accessor.ReadByte(EncodingType.U1);
unsync = (flags & 0x80) != 0;
this.has_ext = (flags & 0x40) != 0;
this.experimental = (flags & 0x20) != 0;
return(accessor.ReadInt32(EncodingType.Int28BE));
}
private static ImageDirectory read(StreamAccessor accessor)
{
ImageDirectory dir = new ImageDirectory(accessor.ReadString(EncodingType.NoSpecified));
uint count = accessor.ReadUInt32(EncodingType.U4);
for (int i = 0; i < count; i++)
{
dir.images.Add(accessor.ReadInt32(EncodingType.I4));
}
dir.dirs = accessor.Read <DirectoryCollection>();
return(dir);
}
private static ImageCollection read_chunk(StreamAccessor accessor)
{
int c = accessor.ReadInt32(EncodingType.I4);
ImageCollection ret = new ImageCollection(c);
ret.count = c;
try{
while (accessor.RestLength > 0)
{
ret.register(accessor.Read <Thumb>());
}
}catch (System.Exception e) {
afh.File.__dll__.log.WriteError(e, "ImageCollection 読み取り中のエラー");
}
return(ret);
}
private void ReadExtHeader(StreamAccessor accessor, out uint crc32, out int padding)
{
uint num = accessor.ReadUInt32(EncodingType.U4BE);
if ((num != 6) && (num != 10))
{
throw new FileFormatException("Extended Header Size は 6B 亦は 10B で在るべきです。");
}
ushort num2 = accessor.ReadUInt16(EncodingType.I2BE);
this.hascrc = (num2 & 0x8000) != 0;
if (num != (this.hascrc ? ((long)10) : ((long)6)))
{
throw new FileFormatException(string.Format("Extended Header Size の大きさが不正です。\r\nCRC Checkを{0}場合には{1}B であるべきです。", this.hascrc ? "行う" : "行わない", this.hascrc ? "10" : "6"));
}
padding = accessor.ReadInt32(EncodingType.U4BE);
crc32 = this.hascrc ? accessor.ReadUInt32(EncodingType.U4BE) : 0;
}
