58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/*
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** Copyright (C) 2010-2011 Erik de Castro Lopo <erikd@mega-nerd.com>
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU Lesser General Public License as published by
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** the Free Software Foundation; either version 2.1 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU Lesser General Public License for more details.
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**
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** You should have received a copy of the GNU Lesser General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "sfconfig.h"
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#include <stdio.h>
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#include <fcntl.h>
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#include <string.h>
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#include <ctype.h>
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#include "sndfile.h"
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#include "sfendian.h"
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#include "common.h"
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int
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id3_skip (SF_PRIVATE * psf)
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{ unsigned char buf [10] ;
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memset (buf, 0, sizeof (buf)) ;
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psf_binheader_readf (psf, "pb", 0, buf, 10) ;
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if (buf [0] == 'I' && buf [1] == 'D' && buf [2] == '3')
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{ int offset = buf [6] & 0x7f ;
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offset = (offset << 7) | (buf [7] & 0x7f) ;
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offset = (offset << 7) | (buf [8] & 0x7f) ;
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offset = (offset << 7) | (buf [9] & 0x7f) ;
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psf_log_printf (psf, "ID3 length : %d\n--------------------\n", offset) ;
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/* Never want to jump backwards in a file. */
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if (offset < 0)
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return 0 ;
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/* Calculate new file offset and position ourselves there. */
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psf->fileoffset += offset + 10 ;
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psf_binheader_readf (psf, "p", psf->fileoffset) ;
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return 1 ;
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} ;
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return 0 ;
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} /* id3_skip */
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