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// The authors have released ID3Lib as Public Domain (PD) and claim no copyright,
// patent or other intellectual property protection in this work. This means that
// it may be modified, redistributed and used in commercial and non-commercial
// software and hardware without restrictions. ID3Lib is distributed on an "AS IS"
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
//
// The ID3Lib authors encourage improvements and optimisations to be sent to the
// ID3Lib coordinator, currently Dirk Mahoney (dirk@id3.org). Approved
// submissions may be altered, and will be included and released under these terms.
//
// Mon Nov 23 18:34:01 1998
#include <string.h>
#include <memory.h>
#include "id3_header_frame.h"
#include "id3_error.h"
void ID3_FrameHeader::SetFrameID ( ID3_FrameID id )
{
frameID = id;
return;
}
luint ID3_FrameHeader::Size ( void )
{
return info->frameIDBytes + info->frameSizeBytes + info->frameFlagsBytes;
}
luint ID3_FrameHeader::GetFrameInfo ( ID3_FrameAttr &attr, uchar *buffer )
{
luint posn = 0;
luint i = 0;
strncpy ( attr.textID, (char *) buffer, info->frameIDBytes );
attr.textID[ info->frameIDBytes ] = 0;
posn += info->frameIDBytes;
attr.size = 0;
for ( i = 0; i < info->frameSizeBytes; i++ )
attr.size |= buffer[ posn + i ] << ( ( info->frameSizeBytes - 1 - i ) * 8 );
posn += info->frameSizeBytes;
attr.flags = 0;
for ( i = 0; i < info->frameFlagsBytes; i++ )
attr.flags |= buffer[ posn + i ] << ( ( info->frameFlagsBytes - 1 - i ) * 8 );
posn += info->frameFlagsBytes;
return posn;
}
luint ID3_FrameHeader::Render ( uchar *buffer )
{
luint bytesUsed = 0;
ID3_FrameDef *frameDef = NULL;
char *textID = NULL;
luint i;
if ( frameDef = ID3_FindFrameDef ( frameID ) )
{
if ( info->frameIDBytes < strlen ( frameDef->longTextID ) )
textID = frameDef->shortTextID;
else
textID = frameDef->longTextID;
}
else
ID3_THROW ( ID3E_InvalidFrameID );
memcpy ( &buffer[ bytesUsed ], (uchar *) textID, info->frameIDBytes );
bytesUsed += info->frameIDBytes;
for ( i = 0; i < info->frameSizeBytes; i++ )
buffer[ bytesUsed + i ] = (uchar) ( ( dataSize >> ( ( info->frameSizeBytes - i - 1 ) * 8 ) ) & 0xFF );
bytesUsed += info->frameSizeBytes;
for ( i = 0; i < info->frameFlagsBytes; i++ )
buffer[ bytesUsed + i ] = (uchar) ( ( flags >> ( ( info->frameFlagsBytes - i - 1 ) * 8 ) ) & 0xFF );
bytesUsed += info->frameFlagsBytes;
return bytesUsed;
}
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