mirror of
https://gitlab.com/mbunkus/mkvtoolnix.git
synced 2024-12-25 20:32:33 +00:00
47 lines
931 B
C++
47 lines
931 B
C++
/*
|
|
mkvmerge -- utility for splicing together matroska files
|
|
from component media subtypes
|
|
|
|
r_mp4.cpp
|
|
|
|
Written by Moritz Bunkus <moritz@bunkus.org>
|
|
|
|
Distributed under the GPL
|
|
see the file COPYING for details
|
|
or visit http://www.gnu.org/copyleft/gpl.html
|
|
*/
|
|
|
|
/*!
|
|
\file
|
|
\version $Id$
|
|
\brief MP4 identification class
|
|
\author Moritz Bunkus <moritz@bunkus.org>
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "r_mp4.h"
|
|
|
|
using namespace std;
|
|
|
|
int mp4_reader_c::probe_file(mm_io_c *mm_io, int64_t size) {
|
|
unsigned char data[20];
|
|
|
|
if (size < 20)
|
|
return 0;
|
|
try {
|
|
mm_io->setFilePointer(0, seek_beginning);
|
|
if (mm_io->read(data, 20) != 20)
|
|
return 0;
|
|
mm_io->setFilePointer(0, seek_beginning);
|
|
} catch (exception &ex) {
|
|
return 0;
|
|
}
|
|
if ((data[4] != 'f') || (data[5] != 't') ||
|
|
(data[6] != 'y') || (data[7] != 'p'))
|
|
return 0;
|
|
return 1;
|
|
}
|