/************************************************************
*FileName:?avilib.c
*Date:	???2018-07-15
*Author:???Wen?Lee
*Version:??V1.0
*Description:?AVI?音視頻格式封裝
*Others:???
*History:	
***********************************************************/
#include?“avilib.h“

static?AVI_S?g_stAVIPara;
static?WAV_S?g_stWAVPara;

static?void?Int2Str（unsigned?char?*dst?int?n）
{
????dst[0]?=?（n）&0xff;
????dst[1]?=?（n>>?8）&0xff;
????dst[2]?=?（n>>16）&0xff;
????dst[3]?=?（n>>24）&0xff;
????return;
}

#define?OUT4CC（s）?\
????if（s64Nhb<=HEADERBYTES-4）?memcpy（arrAVI_header+s64Nhbs4）;?s64Nhb?+=?4

#define?OUTLONG（n）?\
????if（s64Nhb<=HEADERBYTES-4）?Int2Str（arrAVI_header+s64Nhbn）;?s64Nhb?+=?4

#define?OUTSHRT（n）?\
????if（s64Nhb<=HEADERBYTES-2）?{?\
??????arrAVI_header[s64Nhb??]?=?（n???）&0xff;?\
??????arrAVI_header[s64Nhb+1]?=?（n>>8）&0xff;?\
????}?\
????s64Nhb?+=?2

typedef?struct?IDRIndex
{
	short?s16IdrNo;
	char??arrBCDTime[6];
	int???s32OffsetAddr;
	char??arrResv[4];
}__attribute__?（（packed））IDR_INDEX_S;

int?HstAviHeaderWrite（void）
{
	long?s64Nhb;
	//int?s32Strl_start;
	int?s32Hdrl_start?s32Audio_strl_start;
	int??s32Njunk?s32Sampsize?s32HasIndex?s32Ms_per_frame?s32Frate?s32Idxerror?s32Flag;
	unsigned?char?arrAVI_header[HEADERBYTES];
	unsigned?int??l_u32AVILen?=?0;
	unsigned?int?j?=?0;
	
????if（g_stAVIPara.u32AviLen?>?0）
????{
	????l_u32AVILen?=?g_stAVIPara.u32AviLen;
????}??
????else
????{
		l_u32AVILen?=?0;
	}
????????
????s32Idxerror?=?0;
????s32HasIndex?=0;
????
????if（g_stAVIPara.u32MustUseIndex?==1）
????{
????????s32HasIndex?=1;
????}
????
????if（g_stAVIPara.u64fps?????{
????????s32Frate=0;
????????s32Ms_per_frame=0;
????}
????else
????{
????????s32Frate?=?（int）?（frame_RATE_SCALE*g_stAVIPara.u64fps?+?0.5）;
????????s32Ms_per_frame=（int）?（1000000/g_stAVIPara.u64fps?+?0.5）;
????}
????s64Nhb?=?0;
????
????/*?The?RIFF?header?*/
????OUT4CC?（“RIFF“）;
????OUTLONG（l_u32AVILen）;????			/*?#?of?bytes?to?follow?*/
????OUT4CC?（“AVI?“）;
	
????/*?Start?the?header?list?*/
????OUT4CC?（“LIST“）;
????OUTLONG（0）;????????					/*?Length?of?list?in?bytes?don‘t?know?yet?*/
????s32Hdrl_start?=?s64Nhb;??			/*?Store?start?position?*/
????OUT4CC?（“hdrl“）;

????/*?The?main?AVI?header?*/
????/*?The?Flags?in?AVI?File?header*/
????OUT4CC?（“avih“）;
????OUTLONG（56）;?????????????????		/*?#?of?bytes?to?follow?*/
????OUTLONG（s32Ms_per_frame）;???????????/*?Microseconds?per?frame?*/
????OUTLONG（0）;
	/**Specifies?the?alignment?for?data?in?bytes.
	Pad?the?data?to?multiples?of?this?value.**/?
????OUTLONG（g_stAVIPara.u32Gop）;???????
	s32Flag?=?AVIF_ISINTERLEAVED;
????if（s32HasIndex）?s32Flag?|=?AVIF_HASINDEX;
????if（s32HasIndex?&&?g_stAVIPara.u32MustUseIndex）?s32Flag?|=?AVIF_TRUSTCKTYPE;
????OUTLONG（s32Flag）;????????????????????/*?Flags?*/
	OUTLONG（g_stAVIPara.u32Videoframes）;?/*?Vedio?Totalframes?*/
????OUTLONG（0）;??????????????????		?/*?Initialframes?*/
????OUTLONG（g_stAVIPara.u32StreamNum）;	?/**Be?Careful?streams?=?1**/
	OUTLONG（0）;??????????????????		?/*?SuggestedBufferSize?*/
??