player/Project/Src/MJPEG/avi.c

#include "touch_043.h"
#include "usart.h"
#include "timer.h"
#include "avi.h"
#include "mjpeg.h"
#include "lcd_rgb.h"
#include "mymem.h"
#include "ff.h"
#include "dac.h"
//////////////////////////////////////////////////////////////////////////////////	 
//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֻ<EFBFBD><D6BB>ѧϰʹ<CFB0>ã<EFBFBD>δ<EFBFBD><CEB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɣ<EFBFBD><C9A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>κ<EFBFBD><CEBA><EFBFBD>;
//ALIENTEK STM32F407<30><37><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
//AVI<56><49>Ƶ<EFBFBD><C6B5>ʽ<EFBFBD><CABD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD>	   
//<2F><><EFBFBD><EFBFBD>ԭ<EFBFBD><D4AD>@ALIENTEK
//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̳:www.openedv.com
//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:2014/7/20
//<2F>汾<EFBFBD><E6B1BE>V1.0
//<2F><>Ȩ<EFBFBD><C8A8><EFBFBD>У<EFBFBD><D0A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ؾ<EFBFBD><D8BE><EFBFBD>
//Copyright(C) <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ӿƼ<D3BF><C6BC><EFBFBD><EFBFBD>޹<EFBFBD>˾ 2009-2019
//All rights reserved									  
//*******************************************************************************
//<2F>޸<EFBFBD><DEB8><EFBFBD>Ϣ
//<2F><>
////////////////////////////////////////////////////////////////////////////////// 	   

AVI_INFO avix;					//avi<76>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ 
u8*const AVI_VIDS_FLAG_TBL[2]={"00dc","01dc"};//<2F><>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD>ַ<EFBFBD><D6B7><EFBFBD>,00dc/01dc
u8*const AVI_AUDS_FLAG_TBL[2]={"00wb","01wb"};//<2F><>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־<EFBFBD>ַ<EFBFBD><D6B7><EFBFBD>,00wb/01wb

static vu8 g_i2splaybuf;	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ŵ<EFBFBD><C5B5><EFBFBD>Ƶ֡<C6B5><D6A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
static u8* g_i2sbuf[4]; 			//<2F><>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD>֡,<2C><>4֡,4*5K=20K
  
//<2F><>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD>I2S DMA<4D><41><EFBFBD><EFBFBD><EFBFBD>ص<EFBFBD><D8B5><EFBFBD><EFBFBD><EFBFBD>
void audio_i2s_dma_callback(DAC_UserStruct *dac) 
{      
	g_i2splaybuf++;
	if(g_i2splaybuf>3)g_i2splaybuf=0;
	if(dac->buff_useing==1)
	{	 
		DMA_MemoryTargetConfig(DMA1_Stream5,(u32)g_i2sbuf[g_i2splaybuf], DMA_Memory_0);
	}
	else 
	{  
    DMA_MemoryTargetConfig(DMA1_Stream5,(u32)g_i2sbuf[g_i2splaybuf], DMA_Memory_1); 		
	} 
} 


//avi<76><69><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC>
//buf:<3A><><EFBFBD>뻺<EFBFBD><EBBBBA><EFBFBD><EFBFBD>
//size:<3A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С
//<2F><><EFBFBD><EFBFBD>ֵ:AVI_OK,avi<76>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD>
//         <20><><EFBFBD><EFBFBD>,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
AVISTATUS avi_init(u8 *buf,int size)		 
{
	u16 offset;
	u8 *tbuf;
	AVISTATUS res=AVI_OK;
	AVI_HEADER *aviheader;
	LIST_HEADER *listheader;
	AVIH_HEADER *avihheader; 
	STRH_HEADER *strhheader; 
	
	STRF_BMPHEADER *bmpheader; 
	STRF_WAVHEADER *wavheader; 
	
	tbuf=buf;
	aviheader=(AVI_HEADER*)buf; 
	if(aviheader->RiffID!=AVI_RIFF_ID)return AVI_RIFF_ERR;		//RIFF ID<49><44><EFBFBD><EFBFBD>
	if(aviheader->AviID!=AVI_AVI_ID)return AVI_AVI_ERR;			//AVI ID<49><44><EFBFBD><EFBFBD>
	buf+=sizeof(AVI_HEADER);									//ƫ<><C6AB>
	listheader=(LIST_HEADER*)(buf);						
	if(listheader->ListID!=AVI_LIST_ID)return AVI_LIST_ERR;		//LIST ID<49><44><EFBFBD><EFBFBD> 
	if(listheader->ListType!=AVI_HDRL_ID)return AVI_HDRL_ERR;	//HDRL ID<49><44><EFBFBD><EFBFBD> 
	buf+=sizeof(LIST_HEADER);									//ƫ<><C6AB>
	avihheader=(AVIH_HEADER*)(buf);
	if(avihheader->BlockID!=AVI_AVIH_ID)return AVI_AVIH_ERR;	//AVIH ID<49><44><EFBFBD><EFBFBD> 
	avix.SecPerFrame=avihheader->SecPerFrame;					//<2F>õ<EFBFBD>֡<EFBFBD><D6A1><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>
	avix.TotalFrame=avihheader->TotalFrame;						//<2F>õ<EFBFBD><C3B5><EFBFBD>֡<EFBFBD><D6A1>  
	buf+=avihheader->BlockSize+8;								//ƫ<><C6AB>
	listheader=(LIST_HEADER*)(buf);
	if(listheader->ListID!=AVI_LIST_ID)return AVI_LIST_ERR;		//LIST ID<49><44><EFBFBD><EFBFBD> 
	if(listheader->ListType!=AVI_STRL_ID)return AVI_STRL_ERR;	//STRL ID<49><44><EFBFBD><EFBFBD>  
	strhheader=(STRH_HEADER*)(buf+12);
	if(strhheader->BlockID!=AVI_STRH_ID)return AVI_STRH_ERR;	//STRH ID<49><44><EFBFBD><EFBFBD> 
 	if(strhheader->StreamType==AVI_VIDS_STREAM)					//<2F><>Ƶ֡<C6B5><D6A1>ǰ
	{
		if(strhheader->Handler!=AVI_FORMAT_MJPG)return AVI_FORMAT_ERR;	//<2F><>MJPG<50><47>Ƶ<EFBFBD><C6B5>,<2C><>֧<EFBFBD><D6A7>
		avix.VideoFLAG=(u8*)AVI_VIDS_FLAG_TBL[0];					//<2F><>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>  "00dc"
		avix.AudioFLAG=(u8*)AVI_AUDS_FLAG_TBL[1];					//<2F><>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>  "01wb"
		bmpheader=(STRF_BMPHEADER*)(buf+12+strhheader->BlockSize+8);//strf
		if(bmpheader->BlockID!=AVI_STRF_ID)return AVI_STRF_ERR;		//STRF ID<49><44><EFBFBD><EFBFBD>  
		avix.Width=bmpheader->bmiHeader.Width;
		avix.Height=bmpheader->bmiHeader.Height; 
		buf+=listheader->BlockSize+8;								//ƫ<><C6AB>
		listheader=(LIST_HEADER*)(buf);
		if(listheader->ListID!=AVI_LIST_ID)//<2F>Dz<EFBFBD><C7B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ֡<C6B5><D6A1><EFBFBD><EFBFBD>Ƶ<EFBFBD>ļ<EFBFBD>
		{
			avix.SampleRate=0;						//<2F><>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
			avix.Channels=0;						//<2F><>Ƶͨ<C6B5><CDA8><EFBFBD><EFBFBD>
			avix.AudioType=0;						//<2F><>Ƶ<EFBFBD><C6B5>ʽ
			
		}else
		{			
			if(listheader->ListType!=AVI_STRL_ID)return AVI_STRL_ERR;	//STRL ID<49><44><EFBFBD><EFBFBD>   
			strhheader=(STRH_HEADER*)(buf+12);
			if(strhheader->BlockID!=AVI_STRH_ID)return AVI_STRH_ERR;	//STRH ID<49><44><EFBFBD><EFBFBD> 
			if(strhheader->StreamType!=AVI_AUDS_STREAM)return AVI_FORMAT_ERR;//<2F><>ʽ<EFBFBD><CABD><EFBFBD><EFBFBD>
			wavheader=(STRF_WAVHEADER*)(buf+12+strhheader->BlockSize+8);//strf
			if(wavheader->BlockID!=AVI_STRF_ID)return AVI_STRF_ERR;		//STRF ID<49><44><EFBFBD><EFBFBD>   
			avix.SampleRate=wavheader->SampleRate;						//<2F><>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
			avix.Channels=wavheader->Channels;							//<2F><>Ƶͨ<C6B5><CDA8><EFBFBD><EFBFBD>
			avix.AudioType=wavheader->FormatTag;						//<2F><>Ƶ<EFBFBD><C6B5>ʽ
		}
	}else if(strhheader->StreamType==AVI_AUDS_STREAM)		 		//<2F><>Ƶ֡<C6B5><D6A1>ǰ
	{ 
		avix.VideoFLAG=(u8*)AVI_VIDS_FLAG_TBL[1];					//<2F><>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>  "01dc"
		avix.AudioFLAG=(u8*)AVI_AUDS_FLAG_TBL[0];					//<2F><>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>  "00wb"
		wavheader=(STRF_WAVHEADER*)(buf+12+strhheader->BlockSize+8);//strf
		if(wavheader->BlockID!=AVI_STRF_ID)return AVI_STRF_ERR;		//STRF ID<49><44><EFBFBD><EFBFBD> 
		avix.SampleRate=wavheader->SampleRate;						//<2F><>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		avix.Channels=wavheader->Channels;							//<2F><>Ƶͨ<C6B5><CDA8><EFBFBD><EFBFBD>
		avix.AudioType=wavheader->FormatTag;						//<2F><>Ƶ<EFBFBD><C6B5>ʽ
		buf+=listheader->BlockSize+8;								//ƫ<><C6AB>
		listheader=(LIST_HEADER*)(buf);
		if(listheader->ListID!=AVI_LIST_ID)return AVI_LIST_ERR;		//LIST ID<49><44><EFBFBD><EFBFBD> 
		if(listheader->ListType!=AVI_STRL_ID)return AVI_STRL_ERR;	//STRL ID<49><44><EFBFBD><EFBFBD>   
		strhheader=(STRH_HEADER*)(buf+12);
		if(strhheader->BlockID!=AVI_STRH_ID)return AVI_STRH_ERR;	//STRH ID<49><44><EFBFBD><EFBFBD> 
		if(strhheader->StreamType!=AVI_VIDS_STREAM)return AVI_FORMAT_ERR;//<2F><>ʽ<EFBFBD><CABD><EFBFBD><EFBFBD>  
		bmpheader=(STRF_BMPHEADER*)(buf+12+strhheader->BlockSize+8);//strf
		if(bmpheader->BlockID!=AVI_STRF_ID)return AVI_STRF_ERR;		//STRF ID<49><44><EFBFBD><EFBFBD>  
		if(bmpheader->bmiHeader.Compression!=AVI_FORMAT_MJPG)return AVI_FORMAT_ERR;//<2F><>ʽ<EFBFBD><CABD><EFBFBD><EFBFBD>  
		avix.Width=bmpheader->bmiHeader.Width;
		avix.Height=bmpheader->bmiHeader.Height; 	
	}
	offset=avi_srarch_id(tbuf,size,"movi");					//<2F><><EFBFBD><EFBFBD>movi ID
	if(offset==0)return AVI_MOVI_ERR;						//MOVI ID<49><44><EFBFBD><EFBFBD>
	if(avix.SampleRate)//<2F><><EFBFBD><EFBFBD>Ƶ<EFBFBD><C6B5>,<2C>Ų<EFBFBD><C5B2><EFBFBD>
	{
		tbuf+=offset;
		offset=avi_srarch_id(tbuf,size,avix.AudioFLAG);			//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		if(offset==0)return AVI_STREAM_ERR;						//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		tbuf+=offset+4;
		avix.AudioBufSize=*((u16*)tbuf);						//<2F>õ<EFBFBD><C3B5><EFBFBD>Ƶ<EFBFBD><C6B5>buf<75><66>С.
	}		
//	printf("avi init ok\r\n");
//	printf("avix.SecPerFrame:%d\r\n",avix.SecPerFrame);
//	printf("avix.TotalFrame:%d\r\n",avix.TotalFrame);
//	printf("avix.Width:%d\r\n",avix.Width);
//	printf("avix.Height:%d\r\n",avix.Height);
//	printf("avix.AudioType:%d\r\n",avix.AudioType);
//	printf("avix.SampleRate:%d\r\n",avix.SampleRate);
//	printf("avix.Channels:%d\r\n",avix.Channels);
//	printf("avix.AudioBufSize:%d\r\n",avix.AudioBufSize);
//	printf("avix.VideoFLAG:%s\r\n",avix.VideoFLAG); 
//	printf("avix.AudioFLAG:%s\r\n",avix.AudioFLAG); 
	return res;
}

//<2F><><EFBFBD><EFBFBD> ID
//buf:<3A><><EFBFBD>黺<EFBFBD><E9BBBA><EFBFBD><EFBFBD>
//size:<3A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С
//id:Ҫ<><D2AA><EFBFBD>ҵ<EFBFBD>id,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>4<EFBFBD>ֽڳ<D6BD><DAB3><EFBFBD>
//<2F><><EFBFBD><EFBFBD>ֵ:0,<2C><><EFBFBD><EFBFBD>ʧ<EFBFBD><CAA7>,<2C><><EFBFBD><EFBFBD>:movi IDƫ<44><C6AB><EFBFBD><EFBFBD>
u16 avi_srarch_id(u8* buf,int size,u8 *id)
{
	u16 i;
	size-=4;
	for(i=0;i<size;i++)
	{
	   	if(buf[i]==id[0])
			if(buf[i+1]==id[1])
				if(buf[i+2]==id[2])	
					if(buf[i+3]==id[3])return i;//<2F>ҵ<EFBFBD>"id"<22><><EFBFBD>ڵ<EFBFBD>λ<EFBFBD><CEBB>	
	}
	return 0;		
}
//<2F>õ<EFBFBD>stream<61><6D><EFBFBD><EFBFBD>Ϣ
//buf:<3A><><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC>ַ(<28><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>01wb/00wb/01dc/00dc<64><63>ͷ)
AVISTATUS avi_get_streaminfo(u8* buf)
{
	int offset=0;
	avix.StreamID=MAKEWORD(buf+2);			//<2F>õ<EFBFBD><C3B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	avix.StreamSize=MAKEDWORD(buf+4);		//<2F>õ<EFBFBD><C3B5><EFBFBD><EFBFBD><EFBFBD>С 
	if(avix.StreamSize%2)avix.StreamSize++;	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1(avix.StreamSize,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ż<EFBFBD><C5BC>)
	if(avix.StreamID==AVI_VIDS_FLAG||avix.StreamID==AVI_AUDS_FLAG)return AVI_OK;
	return AVI_STREAM_ERR;	
}






static  vu8 g_frame_en=0;


void avi_timer_irq (void)
{
	g_frame_en=1;
}

//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>avix.SecPerFrame
void avi_timer_init (u32 t)
{
	TIMER_InitStruct timer_init={0};
	timer_init.Cycle=t/1;
	timer_init.Tim=TIM3;
	timer_init.UpdataCall=avi_timer_irq;
	TIMER_InitNormal(&timer_init);
}


void avi_tiemr_delete (void)
{
	TIMER_DeInit (TIM3);
}










#define AVI_AUDIO_BUF_SIZE    1024*5		//<2F><><EFBFBD><EFBFBD>avi<76><69><EFBFBD><EFBFBD>ʱ,<2C><>Ƶbuf<75><66>С.
#define AVI_VIDEO_BUF_SIZE    1024*200		//<2F><><EFBFBD><EFBFBD>avi<76><69><EFBFBD><EFBFBD>ʱ,<2C><>Ƶbuf<75><66>С.



//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ
int video_play (char *pname,int loop)
{
	
	 
	u8 listhead[8]={0};//<2F><><EFBFBD><EFBFBD>ͷ
	u32 fresh=0;
	u8* framebuf;	//<2F><>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD>buf	 
	u8* pbuf;		//bufָ<66><D6B8>  
	FIL *favi;
	u8  res=0;
	u16 offset=0; 
	UINT	nr; 
	u8 key;   
  u8 i2ssavebuf;  
	DAC_UserStruct dac={0};
	
	u8 *audio_buff=mymalloc (AVI_AUDIO_BUF_SIZE);	
	framebuf=mymalloc(AVI_VIDEO_BUF_SIZE);	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶbuf
	favi=(FIL*)mymalloc(sizeof(FIL));		//<2F><><EFBFBD><EFBFBD>favi<76>ڴ<EFBFBD> 
	g_i2sbuf[0]=mymalloc(AVI_AUDIO_BUF_SIZE);	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>ڴ<EFBFBD>
	g_i2sbuf[1]=mymalloc(AVI_AUDIO_BUF_SIZE);	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>ڴ<EFBFBD>
	g_i2sbuf[2]=mymalloc(AVI_AUDIO_BUF_SIZE);	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>ڴ<EFBFBD>
	g_i2sbuf[3]=mymalloc(AVI_AUDIO_BUF_SIZE);	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƶ<EFBFBD>ڴ<EFBFBD> 
	mymemset(g_i2sbuf[0],0,AVI_AUDIO_BUF_SIZE);
	mymemset(g_i2sbuf[1],0,AVI_AUDIO_BUF_SIZE); 
	mymemset(g_i2sbuf[2],0,AVI_AUDIO_BUF_SIZE);
	mymemset(g_i2sbuf[3],0,AVI_AUDIO_BUF_SIZE); 
	while(res==0)
	{ 
		res=f_open(favi,(char *)pname,FA_READ);
		if(res==0)
		{
			pbuf=framebuf;			
			res=f_read(favi,pbuf,AVI_VIDEO_BUF_SIZE,&nr);//<2F><>ʼ<EFBFBD><CABC>ȡ	
			if(res)
			{
				break;
			} 	 
			//<2F><>ʼavi<76><69><EFBFBD><EFBFBD>
			res=avi_init(pbuf,AVI_VIDEO_BUF_SIZE);	//avi<76><69><EFBFBD><EFBFBD> 
			if(res)
			{
				break;
			} 	
			//avi_timer_init (avix.SecPerFrame);
			offset=avi_srarch_id(pbuf,AVI_VIDEO_BUF_SIZE,(u8*)"movi");//Ѱ<><D1B0>movi ID	   
			avi_get_streaminfo(pbuf+offset+4);			//<2F><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>Ϣ 
			f_lseek(favi,offset+12-8);					//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>־ID,<2C><><EFBFBD><EFBFBD>ַƫ<D6B7>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݿ<EFBFBD>ʼ<EFBFBD><CABC>	 
			extern void jdmerge_setvideo_xsize (int xsize,int lcd_xsize);
			jdmerge_setvideo_xsize (avix.Width,LCD_GetLcdSizeX());//<2F><><EFBFBD>õ<EFBFBD>ַ<EFBFBD>Զ<EFBFBD><D4B6><EFBFBD><EFBFBD><EFBFBD>
			res=mjpegdec_init((LCD_GetLcdSizeX()-avix.Width)/2,(LCD_GetLcdSizeY()-avix.Height)/2);//JPG<50><47><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><CABC> 
			if(avix.SampleRate)							//<2F><><EFBFBD><EFBFBD>Ƶ<EFBFBD><C6B5>Ϣ,<2C>ų<EFBFBD>ʼ<EFBFBD><CABC>
			{
				//<2F><>ʼ<EFBFBD><CABC>DAC
				dac.buff1=(u32 *)g_i2sbuf[1];
				dac.buff2=(u32 *)g_i2sbuf[2];
				dac.buff_size=avix.AudioBufSize;
				dac.rate=DAC_GetRate(avix.SampleRate);
				dac.call_back=audio_i2s_dma_callback;
				DAC_NormalInit (&dac);
			}
 			while(1)//<2F><><EFBFBD><EFBFBD>ѭ<EFBFBD><D1AD>
			{					
				f_read(favi,listhead,8,&nr);
				if(avi_get_streaminfo(listhead))//<2F><>ȡ<EFBFBD><C8A1>һ֡ <20><><EFBFBD><EFBFBD>־
				{
					break; 
				}
				if (Touch_GetState()->x[1]!=0) break;		//<2F><>Ļ<EFBFBD><C4BB><EFBFBD>㴥<EFBFBD><E3B4A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
				if (USART3_GetKeyPressed()&(0x08)) break;//<2F><><EFBFBD>·<EFBFBD><C2B7>ؼ<EFBFBD><D8BC><EFBFBD><EFBFBD><EFBFBD>
				if(avix.StreamID==AVI_VIDS_FLAG)	//<2F><>Ƶ<EFBFBD><C6B5>
				{
					pbuf=framebuf;
					//mymemset (pbuf,0,AVI_VIDEO_BUF_SIZE);
					f_read(favi,pbuf,avix.StreamSize+8-8,&nr);		//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֡+<2B><>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ID<49><44>Ϣ
					//<2F>ȴ<EFBFBD>֡ʱ<D6A1><CAB1>
					//while (g_frame_en==0){} g_frame_en=0;
					while (LCD_GetLayerUpdataStat ()==0);
					LCD_SwitchLayerBuff();
					res=mjpegdec_decode(pbuf,avix.StreamSize);
					if (res==0) 
					{
						LCD_ExitLayerBuff();
					}
					if(res)
					{
						//break;
					} 
				}else 	//<2F><>Ƶ<EFBFBD><C6B5>
				{		  
//					f_read(favi,audio_buff,avix.StreamSize+8-8,&nr);//<2F><><EFBFBD><EFBFBD>i2sbuf	 
//					pbuf=audio_buff;  
					i2ssavebuf++;
					if(i2ssavebuf>3)i2ssavebuf=0;
					do
					{
						nr=g_i2splaybuf;
						if(nr)nr--;
						else nr=3; 
					}while(i2ssavebuf==nr);//<2F><>ײ<EFBFBD>ȴ<EFBFBD>. 
					f_read(favi,g_i2sbuf[i2ssavebuf],avix.StreamSize,&nr);//<2F><><EFBFBD><EFBFBD>i2sbuf	
					u16 *p=(u16 *)g_i2sbuf[i2ssavebuf];
					for (int i=0;i<avix.StreamSize/2;i++)
						p[i]=(p[i]+0x8000)>>4;
					pbuf=g_i2sbuf[i2ssavebuf];  
				} 
			}
			//avi_tiemr_delete();
			mjpegdec_free();	//<2F>ͷ<EFBFBD><CDB7>ڴ<EFBFBD>
			f_close(favi); 
		}
		if (loop==0)
			break;
	}
	myfree(framebuf);
	myfree(favi);
	myfree(audio_buff);
	myfree(g_i2sbuf[0]);
	myfree(g_i2sbuf[1]);
	myfree(g_i2sbuf[2]);
	myfree(g_i2sbuf[3]);
	DAC_NormalDeInit (&dac);
	return (int)res;

}