99 lines
2.0 KiB
C++
99 lines
2.0 KiB
C++
// The authors have released ID3Lib as Public Domain (PD) and claim no copyright,
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// patent or other intellectual property protection in this work. This means that
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// it may be modified, redistributed and used in commercial and non-commercial
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// software and hardware without restrictions. ID3Lib is distributed on an "AS IS"
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// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
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//
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// The ID3Lib authors encourage improvements and optimisations to be sent to the
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// ID3Lib coordinator, currently Dirk Mahoney (dirk@id3.org). Approved
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// submissions may be altered, and will be included and released under these terms.
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//
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// Mon Nov 23 18:34:01 1998
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#include <string.h>
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#include <memory.h>
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#include "id3_header.h"
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#include "id3_error.h"
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static ID3_HeaderInfo ID3_VersionInfo[4][3] =
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{
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// SIZEOF SIZEOF SIZEOF EXT EXT EXPERIM
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// VER REV FRID FRSZ FRFL HEADER SIZE BIT
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{
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{ 2, 0, 3, 3, 0, false, 0, false },
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{ 2, 1, 3, 3, 0, true, 8, true },
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{0,},
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},
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{
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{ 3, 0, 4, 4, 2, false, 10, false },
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{0,},
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},
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{
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{ 4, 0, 4, 4, 2, false, 10, false },
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{0,},
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},
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{ 0 }
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};
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ID3_HeaderInfo *ID3_LookupHeaderInfo(uchar ver, uchar rev)
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{
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ID3_HeaderInfo *info = NULL;
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size_t v=0,r=0;
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while (ID3_VersionInfo[v][0].version != 0)
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{
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r=0;
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if (ID3_VersionInfo[v][0].version == ver)
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{
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while (ID3_VersionInfo[v][r].version != 0)
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{
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if (ID3_VersionInfo[v][r].revision == rev)
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{
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goto found;
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}
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else
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r++;
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}
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// later revision. still backwards compat so we'll stick with it.
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r--;
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goto found;
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}
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else
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v++;
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}
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found:
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if (ID3_VersionInfo[v][r].version != 0)
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info = &ID3_VersionInfo[v][r];
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return info;
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}
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ID3_Header::ID3_Header(void)
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{
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SetVersion(ID3_TAGVERSION, ID3_TAGREVISION);
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dataSize = 0;
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flags = 0;
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}
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void ID3_Header::SetVersion(uchar ver, uchar rev)
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{
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version = ver;
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revision = rev;
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info = ID3_LookupHeaderInfo(version, revision);
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}
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void ID3_Header::SetDataSize(luint newSize)
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{
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dataSize = newSize;
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}
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void ID3_Header::SetFlags(luint newFlags)
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{
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flags = newFlags;
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}
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