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47 lines
979 B
C++
47 lines
979 B
C++
/*
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mkvmerge -- utility for splicing together matroska files
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from component media subtypes
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r_mp4.cpp
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Written by Moritz Bunkus <moritz@bunkus.org>
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Distributed under the GPL
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see the file COPYING for details
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or visit http://www.gnu.org/copyleft/gpl.html
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*/
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/*!
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\file
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\version \$Id: r_mp4.cpp,v 1.3 2003/05/23 06:34:57 mosu Exp $
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\brief MP4 identification class
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\author Moritz Bunkus <moritz@bunkus.org>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "r_mp4.h"
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using namespace std;
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int mp4_reader_c::probe_file(mm_io_c *mm_io, int64_t size) {
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unsigned char data[20];
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if (size < 20)
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return 0;
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try {
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mm_io->setFilePointer(0, seek_beginning);
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if (mm_io->read(data, 20) != 20)
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return 0;
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mm_io->setFilePointer(0, seek_beginning);
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} catch (exception &ex) {
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return 0;
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}
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if ((data[4] != 'f') || (data[5] != 't') ||
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(data[6] != 'y') || (data[7] != 'p'))
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return 0;
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return 1;
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}
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