/// <summary>
/// <see cref="BinarySubstr"/> から FrameHeader を読み取ります。
/// </summary>
/// <param name="image">FrameHeader の情報を持つ BinarySubstr を指定します。</param>
public unsafe FrameHeader(BinarySubstr image)
{
fixed(byte *fix = image.array)
{
byte * pB = image.CurrentPtr;
FrameHeaderInfo *fh = (FrameHeaderInfo *)pB;
this.frameId = (string)fh->frameID;
this.discardOnAlteringTag = fh->DiscardsIfTagAlter;
this.discardOnAlteringFile = fh->DiscardsIfFileAlter;
this.readOnly = fh->IsReadOnly;
this.compression = fh->IsCompressed;
this.encryption = fh->IsEncrypted;
this.grouping = fh->IsGrouped;
if (this.compression)
{
this.trueSize = fh->TrueSize;
}
if (this.encryption)
{
this.trueSize = fh->EncryptionMethod;
}
if (this.grouping)
{
this.groupId = fh->GroupId;
}
image.index += fh->HeaderSize;
this.content = image.ReadRange((int)(uint)fh->size - fh->ExtraHeaderSize);
}
// this.content の内容を解凍・復号
}
public unsafe TagHeader(byte[] image, int offset)
{
this.fromfile = true;
fixed(byte *pImgB = &image[0])
{
TagHeaderInfo *p = (TagHeaderInfo *)(pImgB + offset);
if (!p->IsID3v2)
{
throw new System.ApplicationException("有効な ID3v2.3.0 tag header ではありません。");
}
this.unsynchronization = p->Unsynchronization;
this.hasExtHeader = p->HasExtendedHeader;
this.experimental = p->IsExperimental;
this.size = (int)p->size;
this.content = new BinarySubstr(image, offset + (int)sizeof(TagHeaderInfo), (int)p->size);
}
if (this.unsynchronization)
{
this.content = this.content.ResolveUnsync();
}
}
/// <summary>
/// 新しい TagHeader を生成します。
/// </summary>
public TagHeader()
{
this.unsynchronization = false;
this.hasExtHeader = false;
this.experimental = false;
this.content = null;
this.fromfile = false;
}
public Tag(byte[] image, int offset)
{
this.header = new TagHeader(image, offset);
BinarySubstr data = this.header.content;
#if DEBUG
__dll__.log.Lock();
__dll__.log.WriteLine("[ID3v2.3.0 Tag]");
__dll__.log.AddIndent();
__dll__.log.WriteVar("IsExperimentalTag", this.header.experimental.ToString());
__dll__.log.WriteVar("Unsynchronization", this.header.unsynchronization.ToString());
__dll__.log.WriteVar("HasExtendedHeader", this.header.hasExtHeader.ToString());
#endif
if (this.header.hasExtHeader)
{
this.extheader = new ExtendedHeader(data);
#if DEBUG
__dll__.log.WriteVar("PaddingSize", this.extheader.paddingSize.ToString());
__dll__.log.WriteVar("HasCRC32", this.extheader.hasCrc32.ToString());
#endif
if (this.extheader.hasCrc32)
{
uint crc32 = data.CalculateCRC32();
__dll__.log.WriteLine(" CRC32 Check: 実 {0:X8} --><-- {1:X8} 理", crc32, this.extheader.crc32);
if (crc32 != this.extheader.crc32)
{
throw new System.ApplicationException("Crc 値が一致しません。");
}
}
}
afh.Collections.DictionaryP <string, FrameHeader> headers = FrameHeader.GetFrameHeaders(data);
this.frames = headers.Map <Frame>(Frame.CreateFrame);
#if DEBUG
__dll__.log.RemoveIndent();
foreach (Gen::KeyValuePair <string, Frame> pair in this.frames)
{
__dll__.log.WriteLine("Frame---");
__dll__.log.AddIndent();
__dll__.log.WriteVar("FrameID", pair.Key);
__dll__.log.WriteVar("FrameType", pair.Value.GetType().FullName);
//__dll__.log.WriteVar("Discards on TagChange",pair.Value.discardOnAlteringTag.ToString());
//__dll__.log.WriteVar("Discards on FileChange",pair.Value.discardOnAlteringFile.ToString());
//__dll__.log.WriteVar("ReadOnly",pair.Value.readOnly.ToString());
//__dll__.log.WriteVar("Compressed",pair.Value.compression.ToString());
//__dll__.log.WriteVar("Encrypted",pair.Value.encryption.ToString());
//__dll__.log.WriteVar("Grouping",pair.Value.grouping.ToString());
if (pair.Value is ID3v2_3_.TextInformationFrame)
{
__dll__.log.WriteVar("TextContent", ((ID3v2_3_.TextInformationFrame)pair.Value).Text);
}
__dll__.log.RemoveIndent();
}
__dll__.log.Unlock();
#endif
}
/// <summary>
/// 新しい FrameHeader を作成します。
/// </summary>
/// <param name="frameId">新しい FrameHeader の FrameId を指定します。</param>
internal FrameHeader(string frameId)
{
this.frameId = frameId;
this.discardOnAlteringTag = false;
this.discardOnAlteringFile = Frame.FramesData[frameId].DiscardOnAlteringFile;
this.readOnly = false;
this.compression = false;
this.encryption = false;
this.grouping = false;
//this.trueSize=0;
//this.encryptionMethod=0;
//this.groupId=0;
this.content = null;
}
/// <summary>
/// ExtendedHeader を初期化します。
/// ExtendedHeader を読み取った後、読み取り位置は読み取った分だけ先に進められます。
/// </summary>
/// <param name="data">ExtendedHeader の情報を指定します。</param>
public unsafe ExtendedHeader(BinarySubstr data)
{
fixed(byte *fix = data.array)
{
ExtendedHeaderInfo *xh = (ExtendedHeaderInfo *)data.CurrentPtr;
this.hasCrc32 = xh->HasCrc32;
if (this.hasCrc32)
{
this.crc32 = (uint)xh->Crc32;
}
this.paddingSize = (uint)xh->paddingSize;
data.index += (int)this.Size;
data.end -= (int)this.paddingSize;
}
}
private unsafe static FrameHeader ReadFrameHeader(BinarySubstr data)
{
string frameID;
fixed(byte *fix = data.array)
{
byte *p = data.CurrentPtr;
byte *pM = data.ptrEnd - 11;
while (*p == 0)
{
if (pM <= p++)
{
return(null);
}
}
frameID = (string)*(CharCode4 *)p;
}
return(new FrameHeader(data));
}
public Frame(FrameHeader header)
{
this.header = header;
this.data = header.content;
}
/// <summary>
/// Frame 情報が並んだデータを持つ BinarySubstr から FrameHeader の集合を読み取ります。
/// </summary>
/// <param name="data">Frame 情報が並んだデータを参照する BinarySubstr を指定します。</param>
/// <returns>読み取った FrameHeader の集合を返します。</returns>
public static afh.Collections.DictionaryP <string, FrameHeader> GetFrameHeaders(BinarySubstr data)
{
FrameHeader fheader;
afh.Collections.DictionaryP <string, FrameHeader> dic = new afh.Collections.DictionaryP <string, FrameHeader>();
while (null != (fheader = ReadFrameHeader(data)))
{
dic.Add(fheader.frameId, fheader);
}
return(dic);
}
