资源简介
这是一个测试程序,将V4L2采集到的JPEG数据使用avilib封装成AVI视频,详细介绍看博客
http://blog.csdn.net/li_wen01/article/details/53707863
代码片段和文件信息
/*
* avilib.c
*
* Copyright (C) Thomas 謘treich - June 2001
* multiple audio track support Copyright (C) 2002 Thomas 謘treich
*
* Original code:
* Copyright (C) 1999 Rainer Johanni
*
* This file is part of transcode a linux video stream processing tool
*
* transcode is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 or (at your option)
* any later version.
*
* transcode is distributed in the hope that it will be useful
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GNU Make; see the file COPYING. If not write to
* the Free Software Foundation 675 Mass Ave Cambridge MA 02139 USA.
*
*/
#include “avilib.h“
//#include
#define INFO_LIST
/* The following variable indicates the kind of error */
long AVI_errno;
#define MAX_INFO_STRLEN 64
static char id_str[MAX_INFO_STRLEN];
#define frame_RATE_SCALE 1000000
#ifndef PACKAGE
#define PACKAGE “my“
#define VERSION “0.00“
#endif
#ifndef O_BINARY
/* win32 wants a binary flag to open(); this sets it to null
on platforms that don‘t have it. */
#define O_BINARY 0
#endif
/*******************************************************************
* *
* Utilities for writing an AVI File *
* *
*******************************************************************/
static size_t avi_read(int fd char *buf size_t len)
{
size_t n = 0;
size_t r = 0;
while (r < len) {
n = read (fd buf + r len - r);
if (n <= 0)
return r;
r += n;
}
return r;
}
static size_t avi_write (int fd char *buf size_t len)
{
size_t n = 0;
size_t r = 0;
while (r < len) {
n = write (fd buf + r len - r);
if (n < 0)
return n;
r += n;
}
return r;
}
/* HEADERBYTES: The number of bytes to reserve for the header */
#define HEADERBYTES 2048
/* AVI_MAX_LEN: The maximum length of an AVI file we stay a bit below
the 2GB limit (Remember: 2*10^9 is smaller than 2 GB) */
#define AVI_MAX_LEN (UINT_MAX-(1<<20)*16-HEADERBYTES)
#define PAD_EVEN(x) ( ((x)+1) & ~1 )
/* Copy n into dst as a 4 byte little endian number.
Should also work on big endian machines */
static void long2str(unsigned char *dst int n)
{
dst[0] = (n )&0xff;
dst[1] = (n>> 8)&0xff;
dst[2] = (n>>16)&0xff;
dst[3] = (n>>24)&0xff;
}
/* Convert a string of 4 or 2 bytes to a number
also working on big endian machines */
static unsigned long str2ulong(unsigned char *str)
{
return ( str[0] |
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