jpegsource.cc

来自「VC视频对象的跟踪提取原代码（vc视频监控源码）」· CC 代码 · 共 57 行

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  JPEGSource.cc (structure copied from MpegStream.cc by Adam Baumberg)     //
//                (based on our new (JPEG) MovieStore and IJG's example.c)   //
//                                                                           //
//  This class reads individual, numbered JPEG files as an ImageSource       //
//                                                                           //
//  This code is written with full colour images in mind (24/32-bit).        //
//                                                                           //
//  Author    : Nils T Siebel (nts)                                          //
//  Created   : Thu Oct 26 18:52:41 GMT 2000                                 //
//  Revision  : 1.5 of Tue Jul 24 15:55:06 BST 2001                          //
//  Copyright : The University of Reading                                    //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#include <unistd.h>
#include <cstdio>
#include <cstring>  // for strncpy() etc
#include <cctype>   // for isdigit()
#include <ostream>
#include <ctime>
#include <sys/timeb.h>
#include <sys/types.h>

#include "JPEGSource.h"

#include "Grey8Image.h"
#include "RGB32Image.h"
#include "tracker_defines_types_and_helpers.h"
#include "text_output.h"

namespace ReadingPeopleTracker
{

static const char *JPEGSource_Revision = "@(#) JPEGSource.cc, rev 1.5 of Tue Jul 24 15:55:06 BST 2001, Author Nils T Siebel, Copyright (c) 2000--2001 The University of Reading";

JPEGSource::JPEGSource(char *first_filename,
		       bool the_skip_non_existing,
		       unsigned int the_max_skip_non_existing)
{
    skip_non_existing = the_skip_non_existing;
    max_skip_non_existing = the_max_skip_non_existing;
    
    signed int pos;
    
    strncpy(JPEGfilename, first_filename, 256+16+64-1);
    JPEGfilename[256+16+64-1] = (char) 0x00;  // avoid overrun
    
    // set up file name(s)...
    for (pos = strlen(JPEGfilename)-1; pos >= 0; pos--)
	if (isdigit(JPEGfilename[pos]))
	    break;
    
    if (pos < 0)
    {
	cerror << "JPEGSource::JPEGSource: To use individual JPEG images as input, please give first filename, like 籭nput017.jpg