player/Project/Src/MP3/mp3play.c

#include "mp3play.h"
#include "stm32f4xx.h"
#include "dac.h"
#include "delay.h"
#include "mymem.h"
#include "usart.h"
#include "string.h"
#include "rtthread.h"
#include "ftfile.h"

//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֱ<EFBFBD><D6B1><EFBFBD>ת<EFBFBD><D7AA>
#include "char_encode.h"




//////////////////////////////////////////////////////////////////////////////////	 
//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֲ<EFBFBD><D6B2>helix MP3<50><33><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
//ALIENTEK STM32F407<30><37><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
//MP3 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>	   
//<2F><><EFBFBD><EFBFBD>ԭ<EFBFBD><D4AD>@ALIENTEK
//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>̳:www.openedv.com
//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:2014/6/29
//<2F>汾<EFBFBD><E6B1BE>V1.0
//********************************************************************************
//V1.0 ˵<><CBB5>
//1,֧<><D6A7>16λ<36><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>/<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>MP3<50>Ľ<EFBFBD><C4BD><EFBFBD>
//2,֧<><D6A7>CBR/VBR<42><52>ʽMP3<50><33><EFBFBD><EFBFBD>
//3,֧<><D6A7>ID3V1<56><31>ID3V2<56><32>ǩ<EFBFBD><C7A9><EFBFBD><EFBFBD>
//4,֧<><D6A7><EFBFBD><EFBFBD><EFBFBD>б<EFBFBD><D0B1><EFBFBD><EFBFBD><EFBFBD>(MP3<50><33><EFBFBD><EFBFBD><EFBFBD><EFBFBD>320Kbps)<29><><EFBFBD><EFBFBD>
////////////////////////////////////////////////////////////////////////////////// 	
 
static __mp3ctrl * mp3ctrl;	//mp3<70><33><EFBFBD>ƽṹ<C6BD><E1B9B9> 
static __audiodev audiodev;	//<2F><>Ƶ<EFBFBD><C6B5><EFBFBD>ƽṹ<C6BD><E1B9B9>
static vu8 g_buff_Invalid=0;		//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ЧʱҪ<CAB1><D2AA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
static vu8 g_buff_useing;				//<2F><>ǰDMA<4D><41>ʹ<EFBFBD><CAB9><EFBFBD>ĸ<EFBFBD><C4B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
static int g_vol=5;           //<2F><><EFBFBD><EFBFBD> 0~10<31><30>
#define MP3_VOL_MAX 10


//MP3 DMA<4D><41><EFBFBD>ͻص<CDBB><D8B5><EFBFBD><EFBFBD><EFBFBD>
static void dma_tx_callback(DAC_UserStruct *dac) 
{    
	u16 i;
	if (dac->buff_useing==1)
	{
		if((audiodev.status&0X01)==0)//<2F><>ͣ<EFBFBD><CDA3>,<2C><><EFBFBD><EFBFBD>0
		{
			for(i=0;i<2304*2;i++)audiodev.i2sbuf1[i]=0;
		}
	}else 
	{
		if((audiodev.status&0X01)==0)//<2F><>ͣ<EFBFBD><CDA3>,<2C><><EFBFBD><EFBFBD>0
		{
			for(i=0;i<2304*2;i++)audiodev.i2sbuf2[i]=0;
		}
	}
	g_buff_useing=dac->buff_useing;
	g_buff_Invalid=1;	
} 
//<2F><><EFBFBD><EFBFBD>PCM<43><4D><EFBFBD>ݵ<EFBFBD>DAC
//buf:PCM<43><4D><EFBFBD><EFBFBD><EFBFBD>׵<EFBFBD>ַ
//size:pcm<63><6D><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(16λΪ<CEBB><CEAA>λ)
//nch:<3A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>(1,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>,2<><32><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)
void mp3_fill_buffer(u16* buf,u16 size,u8 nch)
{
	u16 i; 
	s16 *p;
	while(g_buff_Invalid==0)//<2F>ȴ<EFBFBD><C8B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	{
		rt_thread_delay(5);//
	};
	if(g_buff_useing==0)
	{
		p=(s16*)audiodev.i2sbuf2;
	}else 
	{
		p=(s16*)audiodev.i2sbuf1;
	}
	if(nch==2)
	{
		for(i=0;i<size;i++)
		{
//			p[i]=((buf[i]+0x8000)>>4);
            int temp=(int16_t)buf[i];
            temp=temp*g_vol/MP3_VOL_MAX;
			p[i]=((temp+0x8000)>>4);
		}
	}
	else	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	{
		for(i=0;i<size;i++)
		{
            int temp=(int16_t)buf[i];
            temp=temp*g_vol/MP3_VOL_MAX;
			p[2*i]=((temp+0x8000)>>4);
			p[2*i+1]=p[2*i];
		}
	}
	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><D6AE><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA>Ч
	g_buff_Invalid=0;
} 



static void mp3_get_string (u8 type,u8 *out,u8 *in,int size);




//<2F><><EFBFBD><EFBFBD>ID3V1 
//buf:<3A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݻ<EFBFBD><DDBB><EFBFBD><EFBFBD><EFBFBD>(<28><>С<EFBFBD>̶<EFBFBD><CCB6><EFBFBD>128<32>ֽ<EFBFBD>)
//pctrl:MP3<50><33><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
//<2F><><EFBFBD><EFBFBD>ֵ:0,<2C><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>
//    <20><><EFBFBD><EFBFBD>,<2C><>ȡʧ<C8A1><CAA7>
u8 mp3_id3v1_decode(u8* buf,__mp3ctrl *pctrl)
{
	ID3V1_Tag *id3v1tag;
	id3v1tag=(ID3V1_Tag*)buf;
	if (strncmp("TAG",(char*)id3v1tag->id,3)==0)//<2F><>MP3 ID3V1 TAG
	{
		mp3_get_string(0,pctrl->title,id3v1tag->title,30);
		mp3_get_string(0,pctrl->artist,id3v1tag->artist,30);
	}else return 1;
	return 0;
}





static void mp3_get_string (u8 type,u8 *out,u8 *in,int size)
{
	if (type==1)//UNICODE16
	{
		u8 *char_uni=mymalloc (128);
		mymemset(char_uni,0,128);
		strncpy((char*)char_uni,(char*)(in),size);
		//UnicodeתGBK
		uni2gbk_str(char_uni,out);
		myfree(char_uni);
	}
	else if (type==3)//UTF8
	{
		u8 *char_utf8=mymalloc (128);
		mymemset(char_utf8,0,128);
		strncpy((char*)char_utf8,(char*)(in),size);
		
		//UTF8תGBK
		utf82gbk_str (char_utf8,out);
		
		myfree(char_utf8);
	}
	else //(type==0)//ASCII
	{
		strncpy((char*)out,(char*)(in),size);
	}
}









//<2F><><EFBFBD><EFBFBD>ID3V2 
//buf:<3A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݻ<EFBFBD><DDBB><EFBFBD><EFBFBD><EFBFBD>
//size:<3A><><EFBFBD>ݴ<EFBFBD>С
//pctrl:MP3<50><33><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
//<2F><><EFBFBD><EFBFBD>ֵ:0,<2C><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>
//    <20><><EFBFBD><EFBFBD>,<2C><>ȡʧ<C8A1><CAA7>
u8 mp3_id3v2_decode(u8* buf,u32 size,__mp3ctrl *pctrl)
{
	ID3V2_TagHead *taghead;
	ID3V23_FrameHead *framehead; 
	u32 t;
	u32 tagsize;	//tag<61><67>С
	u32 frame_size;	//֡<><D6A1>С 
	taghead=(ID3V2_TagHead*)buf; 
	if(strncmp("ID3",(const char*)taghead->id,3)==0)//<2F><><EFBFBD><EFBFBD>ID3?
	{
		tagsize=((u32)taghead->size[0]<<21)|((u32)taghead->size[1]<<14)|((u16)taghead->size[2]<<7)|taghead->size[3];//<2F>õ<EFBFBD>tag <20><>С
		pctrl->datastart=tagsize;		//<2F>õ<EFBFBD>mp3<70><33><EFBFBD>ݿ<EFBFBD>ʼ<EFBFBD><CABC>ƫ<EFBFBD><C6AB><EFBFBD><EFBFBD>
		if(tagsize>size)tagsize=size;	//tagsize<7A><65><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>bufsize<7A><65>ʱ<EFBFBD><CAB1>,ֻ<><D6BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>size<7A><65>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		if(taghead->mversion<3)
		{
			printf("not supported mversion!\r\n");
			return 1;
		}
		t=10;
		while(t<tagsize)
		{
			framehead=(ID3V23_FrameHead*)(buf+t);
			frame_size=((u32)framehead->size[0]<<24)|((u32)framehead->size[1]<<16)|((u32)framehead->size[2]<<8)|framehead->size[3];//<2F>õ<EFBFBD>֡<EFBFBD><D6A1>С
 			if (strncmp("TT2",(char*)framehead->id,3)==0||strncmp("TIT2",(char*)framehead->id,4)==0)//<2F>ҵ<EFBFBD><D2B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֡,<2C><>֧<EFBFBD><D6A7>unicode<64><65>ʽ!!
			{
				u8 *dat_ptr=(buf+t+sizeof(ID3V23_FrameHead));
				int size=AUDIO_MIN(frame_size-1,MP3_TITSIZE_MAX-1);
				mp3_get_string(dat_ptr[0],pctrl->title,dat_ptr+1,size);
			} 
 			if (strncmp("TP1",(char*)framehead->id,3)==0||strncmp("TPE1",(char*)framehead->id,4)==0)//<2F>ҵ<EFBFBD><D2B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֡
			{
				u8 *dat_ptr=(buf+t+sizeof(ID3V23_FrameHead));
				int size=AUDIO_MIN(frame_size-1,MP3_ARTSIZE_MAX-1);
				mp3_get_string(dat_ptr[0],pctrl->artist,dat_ptr+1,size);
			}
//			if (strncmp("APIC",(char*)framehead->id,4)==0)
//			{
//				//ר<><D7A8><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
//				u8 *dat_ptr=(buf+t+sizeof(ID3V23_FrameHead));
//				if (pctrl->jpeg_data) myfree(pctrl->jpeg_data);
//				pctrl->jpeg_data=mymalloc(frame_size);
//				pctrl->jpeg_len=frame_size;
//				mymemcpy (pctrl->jpeg_data,dat_ptr,frame_size);
//			}
			t+=frame_size+sizeof(ID3V23_FrameHead);
		} 
		return 0;
	}else
	{	pctrl->datastart=0;//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ID3,mp3<70><33><EFBFBD><EFBFBD><EFBFBD>Ǵ<EFBFBD>0<EFBFBD><30>ʼ
		return (u8)-1;
	}
} 

//<2F><>ȡMP3<50><33><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ
//pname:MP3<50>ļ<EFBFBD>·<EFBFBD><C2B7>
//pctrl:MP3<50><33><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϣ<EFBFBD>ṹ<EFBFBD><E1B9B9> 
//<2F><><EFBFBD><EFBFBD>ֵ:0,<2C>ɹ<EFBFBD>
//    <20><><EFBFBD><EFBFBD>,ʧ<><CAA7>
u8 mp3_get_info(u8 *data,u32 size,__mp3ctrl* pctrl)
{
	HMP3Decoder decoder={0};
	MP3FrameInfo frame_info={0};
	MP3_FrameXing* fxing=0;
	MP3_FrameVBRI* fvbri=0;
	u8 *buf=0;
	u8 *data_ptr=0;
	//u32 br;
	u8 res=0;
	int offset=0;
	u32 p=0;
	short samples_per_frame=0;	//һ֡<D2BB>IJ<EFBFBD><C4B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	u32 totframes=0;				//<2F><>֡<EFBFBD><D6A1>
	
	buf=mymalloc(MP3_FILE_BUF_SZ);		//<2F><><EFBFBD><EFBFBD>5K<35>ڴ<EFBFBD> 
	if(buf)//<2F>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɹ<EFBFBD>
	{ 
		data_ptr=data;
		mymemcpy (buf,data_ptr,MP3_FILE_BUF_SZ);
		if(res==0)//<2F><>ȡ<EFBFBD>ļ<EFBFBD><C4BC>ɹ<EFBFBD>,<2C><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>ID3V2/ID3V1<56>Լ<EFBFBD><D4BC><EFBFBD>ȡMP3<50><33>Ϣ
		{  
			if (mp3_id3v2_decode(buf,MP3_FILE_BUF_SZ,pctrl)!=0)	//<2F><><EFBFBD><EFBFBD>ID3V2<56><32><EFBFBD><EFBFBD>
			{
				data_ptr=data+size-128;
				mymemcpy (buf,data_ptr,128);
				mp3_id3v1_decode(buf,pctrl);	//<2F><><EFBFBD><EFBFBD>ID3V1<56><31><EFBFBD><EFBFBD>  
			}
			decoder=MP3InitDecoder(); 		//MP3<50><33><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>
			data_ptr=data+pctrl->datastart;
			mymemcpy (buf,data_ptr,MP3_FILE_BUF_SZ);
 			offset=MP3FindSyncWord(buf,MP3_FILE_BUF_SZ);	//<2F><><EFBFBD><EFBFBD>֡ͬ<D6A1><CDAC><EFBFBD><EFBFBD>Ϣ
			if(offset>=0&&MP3GetNextFrameInfo(decoder,&frame_info,&buf[offset])==0)//<2F>ҵ<EFBFBD>֡ͬ<D6A1><CDAC><EFBFBD><EFBFBD>Ϣ<EFBFBD><CFA2>,<2C><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD>Ϣ<EFBFBD><CFA2>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>	
			{ 
				p=offset+4+32;
				fvbri=(MP3_FrameVBRI*)(buf+p);
				if(strncmp("VBRI",(char*)fvbri->id,4)==0)//<2F><><EFBFBD><EFBFBD>VBRI֡(VBR<42><52>ʽ)
				{
					if (frame_info.version==MPEG1)samples_per_frame=1152;//MPEG1,layer3ÿ֡<C3BF><D6A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1152
					else samples_per_frame=576;//MPEG2/MPEG2.5,layer3ÿ֡<C3BF><D6A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>576 
 					totframes=((u32)fvbri->frames[0]<<24)|((u32)fvbri->frames[1]<<16)|((u16)fvbri->frames[2]<<8)|fvbri->frames[3];//<2F>õ<EFBFBD><C3B5><EFBFBD>֡<EFBFBD><D6A1>
					pctrl->totsec=totframes*samples_per_frame/frame_info.samprate;//<2F>õ<EFBFBD><C3B5>ļ<EFBFBD><C4BC>ܳ<EFBFBD><DCB3><EFBFBD>
				}else	//<2F><><EFBFBD><EFBFBD>VBRI֡,<2C><><EFBFBD><EFBFBD><EFBFBD>Dz<EFBFBD><C7B2><EFBFBD>Xing֡(VBR<42><52>ʽ)
				{  
					if (frame_info.version==MPEG1)	//MPEG1 
					{
						p=frame_info.nChans==2?32:17;
						samples_per_frame = 1152;	//MPEG1,layer3ÿ֡<C3BF><D6A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>1152
					}else
					{
						p=frame_info.nChans==2?17:9;
						samples_per_frame=576;		//MPEG2/MPEG2.5,layer3ÿ֡<C3BF><D6A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>576
					}
					p+=offset+4;
					fxing=(MP3_FrameXing*)(buf+p);
					if(strncmp("Xing",(char*)fxing->id,4)==0||strncmp("Info",(char*)fxing->id,4)==0)//<2F><>Xng֡
					{
						if(fxing->flags[3]&0X01)//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>frame<6D>ֶ<EFBFBD>
						{
							totframes=((u32)fxing->frames[0]<<24)|((u32)fxing->frames[1]<<16)|((u16)fxing->frames[2]<<8)|fxing->frames[3];//<2F>õ<EFBFBD><C3B5><EFBFBD>֡<EFBFBD><D6A1>
							pctrl->totsec=totframes*samples_per_frame/frame_info.samprate;//<2F>õ<EFBFBD><C3B5>ļ<EFBFBD><C4BC>ܳ<EFBFBD><DCB3><EFBFBD>
						}else	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>frames<65>ֶ<EFBFBD>
						{
							pctrl->totsec=size/(frame_info.bitrate/8);
						} 
					}else 		//CBR<42><52>ʽ,ֱ<>Ӽ<EFBFBD><D3BC><EFBFBD><EFBFBD>ܲ<EFBFBD><DCB2><EFBFBD>ʱ<EFBFBD><CAB1>
					{
						pctrl->totsec=size/(frame_info.bitrate/8);
					}
				} 
				pctrl->bitrate=frame_info.bitrate;			//<2F>õ<EFBFBD><C3B5><EFBFBD>ǰ֡<C7B0><D6A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
				mp3ctrl->samplerate=frame_info.samprate; 	//<2F>õ<EFBFBD><C3B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>. 
				if(frame_info.nChans==2)mp3ctrl->outsamples=frame_info.outputSamps; //<2F><><EFBFBD><EFBFBD>PCM<43><4D><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С 
				else mp3ctrl->outsamples=frame_info.outputSamps*2; //<2F><><EFBFBD><EFBFBD>PCM<43><4D><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С,<2C><><EFBFBD>ڵ<EFBFBD><DAB5><EFBFBD><EFBFBD><EFBFBD>MP3,ֱ<><D6B1>*2,<2C><><EFBFBD><EFBFBD>Ϊ˫<CEAA><CBAB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
			}else res=0XFE;//δ<>ҵ<EFBFBD>ͬ<EFBFBD><CDAC>֡	
			MP3FreeDecoder(decoder);//<2F>ͷ<EFBFBD><CDB7>ڴ<EFBFBD>		
		} 
	}else res=0XFF;
	myfree(buf);	
	return res;	
}  
//<2F>õ<EFBFBD><C3B5><EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>
//fx:<3A>ļ<EFBFBD>ָ<EFBFBD><D6B8>
//mp3x:mp3<70><33><EFBFBD>ſ<EFBFBD><C5BF><EFBFBD><EFBFBD><EFBFBD>
//void mp3_get_curtime(FIL*fx, FILINFO *finfo,__mp3ctrl *mp3x)
//{
//	u32 fpos=0;  	 
//	if(fx->fptr>mp3x->datastart)fpos=fx->fptr-mp3x->datastart;	//<2F>õ<EFBFBD><C3B5><EFBFBD>ǰ<EFBFBD>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD>ŵ<EFBFBD><C5B5>ĵط<C4B5> 
//	mp3x->cursec=fpos*mp3x->totsec/(finfo->fsize-mp3x->datastart);	//<2F><>ǰ<EFBFBD><C7B0><EFBFBD>ŵ<EFBFBD><C5B5>ڶ<EFBFBD><DAB6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>?	
//}
//mp3<70>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>˺<EFBFBD><CBBA><EFBFBD>
//pos:<3A><>Ҫ<EFBFBD><D2AA>λ<EFBFBD><CEBB><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>λ<EFBFBD><CEBB>
//<2F><><EFBFBD><EFBFBD>ֵ:<3A><>ǰ<EFBFBD>ļ<EFBFBD>λ<EFBFBD><CEBB>(<28><><EFBFBD><EFBFBD>λ<EFBFBD><CEBB><EFBFBD>Ľ<EFBFBD><C4BD><EFBFBD>)
u32 mp3_file_seek(u32 pos)
{
//	if(pos>audiodev.file->fsize)
//	{
//		pos=audiodev.file->fsize;
//	}
//	f_lseek(audiodev.file,pos);
//	return audiodev.file->fptr;
	return pos;
}




//<2F>ж<EFBFBD>mp3<70>Ƿ<EFBFBD>֧<EFBFBD><D6A7>
//<2F><>ȡ MP3_FILE_BUF_SZ <20><>С<EFBFBD><D0A1><EFBFBD><EFBFBD><EFBFBD>ݾ<EFBFBD><DDBE><EFBFBD><EFBFBD><EFBFBD>
//<2F><><EFBFBD><EFBFBD>0 ֧<>֣<EFBFBD><D6A3><EFBFBD>0 <20><>֧<EFBFBD><D6A7>
int mp3_get_support (u8* data,u32 size) 
{
	int res=0;
	__mp3ctrl *mp3ctrl=mymalloc(sizeof(__mp3ctrl)); 
	mymemset(mp3ctrl,0,sizeof(__mp3ctrl));//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 
	res=mp3_get_info(data,size,mp3ctrl);  
	if (mp3ctrl->jpeg_data) myfree(mp3ctrl->jpeg_data);
	myfree(mp3ctrl);
	mp3ctrl=0;
	return res;
}

//<2F><><EFBFBD><EFBFBD>0 ֧<>֣<EFBFBD><D6A3><EFBFBD>0 <20><>֧<EFBFBD><D6A7>
int mp3_get_support_name (const char *name)
{
	//<2F><><EFBFBD>巵<EFBFBD>ر<EFBFBD><D8B1><EFBFBD>
	int res=0;
	
	//<2F><>ʼ<EFBFBD><CABC>mp3<70>ṹ<EFBFBD><E1B9B9>
	__mp3ctrl *mp3ctrl=mymalloc(sizeof(__mp3ctrl)); 
	mymemset(mp3ctrl,0,sizeof(__mp3ctrl));//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 
	
	//<2F><><EFBFBD>뻺<EFBFBD><EBBBBA>
	u32 buf_size=1024*5;
	u8 *buf=mymalloc (buf_size);
	
	//<2F><><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>
	ft_file_struct *file=ft_if_fopen(name,"rw");
	
	//<2F><>ȡͷ<C8A1><CDB7>С
	ft_if_fseek(file,0,SEEK_SET);
	ft_if_fread(buf,1,buf_size,file);
	ID3V2_TagHead *taghead;
	u32 tagsize=0;	//tag<61><67>С
	taghead=(ID3V2_TagHead*)buf; 
	if(strncmp("ID3",(const char*)taghead->id,3)==0)//<2F><><EFBFBD><EFBFBD>ID3?
	{
		tagsize=((u32)taghead->size[0]<<21)|((u32)taghead->size[1]<<14)|((u16)taghead->size[2]<<7)|taghead->size[3];//<2F>õ<EFBFBD>tag <20><>С
	}
	
	//У<><D0A3><EFBFBD><EFBFBD>ʽ<EFBFBD>Ƿ<EFBFBD>֧<EFBFBD><D6A7>
	HMP3Decoder decoder={0};
	MP3FrameInfo frame_info={0};
	int offset=0;
	decoder=MP3InitDecoder(); 		//MP3<50><33><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>
	ft_if_fseek(file,tagsize,SEEK_SET);
	ft_if_fread(buf,1,buf_size,file);
	offset=MP3FindSyncWord(buf,buf_size);	//<2F><><EFBFBD><EFBFBD>֡ͬ<D6A1><CDAC><EFBFBD><EFBFBD>Ϣ
	if(offset>=0&&MP3GetNextFrameInfo(decoder,&frame_info,&buf[offset])==0)//<2F>ҵ<EFBFBD>֡ͬ<D6A1><CDAC><EFBFBD><EFBFBD>Ϣ<EFBFBD><CFA2>,<2C><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD>Ϣ<EFBFBD><CFA2>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>
	{ res=0; }	
	else res=-1;
	MP3FreeDecoder(decoder);//<2F>ͷ<EFBFBD><CDB7>ڴ<EFBFBD>		

	//<2F>ر<EFBFBD><D8B1>ļ<EFBFBD>
	ft_if_fclose(file);
			
	//<2F>ͷŻ<CDB7><C5BB><EFBFBD>
	myfree(buf);
	
	//<2F>ͷ<EFBFBD>mp3<70>ṹ<EFBFBD><E1B9B9>
	myfree(mp3ctrl);
			
	//<2F><><EFBFBD>ؽ<EFBFBD><D8BD><EFBFBD>
	return res;
}





//<2F><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>MP3<50><33><EFBFBD><EFBFBD>
//fname:MP3<50>ļ<EFBFBD>·<EFBFBD><C2B7>.
//<2F><><EFBFBD><EFBFBD>ֵ:0,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
//[b7]:0,<2C><><EFBFBD><EFBFBD>״̬;1,<2C><><EFBFBD><EFBFBD>״̬
//[b6:0]:b7=0ʱ,<2C><>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 
//       b7=1ʱ,<2C><>ʾ<EFBFBD>д<EFBFBD><D0B4><EFBFBD>(<28><><EFBFBD>ﲻ<EFBFBD>ж<EFBFBD><D0B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>,0X80~0XFF,<2C><><EFBFBD><EFBFBD><EFBFBD>Ǵ<EFBFBD><C7B4><EFBFBD>)
u8 mp3_play_song(u8* data,u32 size) 
{ 
	
	if (mp3ctrl) return AP_ERR;//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>룡
	HMP3Decoder mp3decoder={0};
	MP3FrameInfo mp3frameinfo={0};
	u8 res=0;
	u8* buffer=0;		//<2F><><EFBFBD><EFBFBD>buffer  
	u8* readptr=0;	//MP3<50><33><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><D6B8>
	u8 *data_ptr=0;
	int offset=0;	//ƫ<><C6AB><EFBFBD><EFBFBD>
	int outofdata=0;//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݷ<EFBFBD>Χ
	int bytesleft=0;//buffer<65><72>ʣ<EFBFBD><CAA3><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><D0A7><EFBFBD><EFBFBD>
	u32 br=0; 
	int err=0;  
	DAC_UserStruct dac={0};
	
 	mp3ctrl=mymalloc(sizeof(__mp3ctrl)); 
	buffer=mymalloc(MP3_FILE_BUF_SZ); 	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>buf<75><66>С
	audiodev.i2sbuf1=mymalloc(2304*2);
	audiodev.i2sbuf2=mymalloc(2304*2);
	audiodev.tbuf=mymalloc(2304*2);
	audiodev.file_seek=mp3_file_seek;
	
	if(!mp3ctrl||!buffer||!audiodev.i2sbuf1||!audiodev.i2sbuf2||!audiodev.tbuf)//<2F>ڴ<EFBFBD><DAB4><EFBFBD><EFBFBD><EFBFBD>ʧ<EFBFBD><CAA7>
	{
		myfree(mp3ctrl);
		myfree(buffer);
		myfree(audiodev.i2sbuf1);
		myfree(audiodev.i2sbuf2);
		myfree(audiodev.tbuf); 
		return AP_ERR;	//<2F><><EFBFBD><EFBFBD>
	} 
	mymemset(audiodev.i2sbuf1,0,2304*2);	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 
	mymemset(audiodev.i2sbuf2,0,2304*2);	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 
	mymemset(mp3ctrl,0,sizeof(__mp3ctrl));//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 
	res=mp3_get_info(data,size,mp3ctrl);  
	if(res==0)
	{ 
		
		//<2F><>ʼ<EFBFBD><CABC>DAC
		dac.buff1=(u32 *)audiodev.i2sbuf1;
		dac.buff2=(u32 *)audiodev.i2sbuf2;
		//dac.buff_size=2304*2;
		dac.buff_size=mp3ctrl->outsamples*2;
		dac.rate=DAC_GetRate(mp3ctrl->samplerate);
		dac.call_back=dma_tx_callback;
		DAC_NormalInit (&dac);
		mp3decoder=MP3InitDecoder(); 					//MP3<50><33><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڴ<EFBFBD>
		audiodev.status|=1<<1;		//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
		audiodev.status|=1<<0;		//<2F><><EFBFBD><EFBFBD>ͣ״̬
	}
	if(res==0&&mp3decoder!=0)//<2F><><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD><C4BC>ɹ<EFBFBD>
	{ 
		//f_lseek(audiodev.file,mp3ctrl->datastart);	//<2F><><EFBFBD><EFBFBD><EFBFBD>ļ<EFBFBD>ͷ<EFBFBD><CDB7>tag<61><67>Ϣ
		data_ptr=data+mp3ctrl->datastart;
		//audio_start();								//<2F><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD> 
		while(res==0)
		{
			readptr=buffer;	//MP3<50><33>ָ<EFBFBD><D6B8>ָ<EFBFBD><D6B8>buffer
			offset=0;		//ƫ<><C6AB><EFBFBD><EFBFBD>Ϊ0
			outofdata=0;	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
			bytesleft=0;	
			//res=f_read(audiodev.file,buffer,MP3_FILE_BUF_SZ,&br);//һ<>ζ<EFBFBD>ȡMP3_FILE_BUF_SZ<53>ֽ<EFBFBD>
			br=MP3_FILE_BUF_SZ;
			if (br>data+size-data_ptr) br=data+size-data_ptr;
			mymemcpy (buffer,data_ptr,br);
			data_ptr+=br;
			if(res)//<2F><><EFBFBD><EFBFBD><EFBFBD>ݳ<EFBFBD><DDB3><EFBFBD><EFBFBD><EFBFBD>
			{
				res=AP_ERR;
				break;
			}
			if(br==0)		//<2F><><EFBFBD><EFBFBD>Ϊ0,˵<><CBB5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>.
			{
				res=AP_OK;	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
				break;
			}
			bytesleft+=br;	//buffer<65><72><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><D0B6><EFBFBD><EFBFBD><EFBFBD>ЧMP3<50><33><EFBFBD><EFBFBD>?
			err=0;			
			while(!outofdata)//û<>г<EFBFBD><D0B3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>쳣(<28><><EFBFBD>ɷ<EFBFBD><C9B7>ҵ<EFBFBD>֡ͬ<D6A1><CDAC><EFBFBD>ַ<EFBFBD>)
			{
				offset=MP3FindSyncWord(readptr,bytesleft);//<2F><>readptrλ<72><CEBB>,<2C><>ʼ<EFBFBD><CABC><EFBFBD><EFBFBD>ͬ<EFBFBD><CDAC><EFBFBD>ַ<EFBFBD>
				if(offset<0)	//û<><C3BB><EFBFBD>ҵ<EFBFBD>ͬ<EFBFBD><CDAC><EFBFBD>ַ<EFBFBD>,<2C><><EFBFBD><EFBFBD>֡<EFBFBD><D6A1><EFBFBD><EFBFBD>ѭ<EFBFBD><D1AD>
				{ 
					outofdata=1;//û<>ҵ<EFBFBD>֡ͬ<D6A1><CDAC><EFBFBD>ַ<EFBFBD>
				}else	//<2F>ҵ<EFBFBD>ͬ<EFBFBD><CDAC><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD>
				{
					readptr+=offset;		//MP3<50><33>ָ<EFBFBD><D6B8>ƫ<EFBFBD>Ƶ<EFBFBD>ͬ<EFBFBD><CDAC><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD>.
					bytesleft-=offset;		//buffer<65><72><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ч<EFBFBD><D0A7><EFBFBD>ݸ<EFBFBD><DDB8><EFBFBD>,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȥƫ<C8A5><C6AB><EFBFBD><EFBFBD>
					err=MP3Decode(mp3decoder,&readptr,&bytesleft,(short*)audiodev.tbuf,0);//<2F><><EFBFBD><EFBFBD>һ֡MP3<50><33><EFBFBD><EFBFBD>
					
					if(err!=0)
					{
						//printf("decode error:%d\r\n",err);
						break;
					}else
					{
						MP3GetLastFrameInfo(mp3decoder,&mp3frameinfo);	//<2F>õ<EFBFBD><C3B5>ոս<D5B8><D5BD><EFBFBD><EFBFBD><EFBFBD>MP3֡<33><D6A1>Ϣ
						if(mp3ctrl->bitrate!=mp3frameinfo.bitrate)		//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
						{
							mp3ctrl->bitrate=mp3frameinfo.bitrate; 
						}
						mp3_fill_buffer((u16*)audiodev.tbuf,mp3frameinfo.outputSamps,mp3frameinfo.nChans);//<2F><><EFBFBD><EFBFBD>pcm<63><6D><EFBFBD><EFBFBD>
					}
					if(bytesleft<MAINBUF_SIZE*2)//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>С<EFBFBD><D0A1>2<EFBFBD><32>MAINBUF_SIZE<5A><45>ʱ<EFBFBD><CAB1>,<2C><><EFBFBD>벹<EFBFBD><EBB2B9><EFBFBD>µ<EFBFBD><C2B5><EFBFBD><EFBFBD>ݽ<EFBFBD><DDBD><EFBFBD>.
					{ 
						memmove(buffer,readptr,bytesleft);//<2F>ƶ<EFBFBD>readptr<74><72>ָ<EFBFBD><D6B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݵ<EFBFBD>buffer<65><72><EFBFBD><EFBFBD>,<2C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>СΪ:bytesleft
						//f_read(audiodev.file,buffer+bytesleft,MP3_FILE_BUF_SZ-bytesleft,&br);//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>µ<EFBFBD><C2B5><EFBFBD><EFBFBD><EFBFBD>
						br=MP3_FILE_BUF_SZ-bytesleft;
						if (br>data+size-data_ptr) br=data+size-data_ptr;
						mymemcpy (buffer+bytesleft,data_ptr,br);
						data_ptr+=br;
						if(br<MP3_FILE_BUF_SZ-bytesleft)
						{
							mymemset(buffer+bytesleft+br,0,MP3_FILE_BUF_SZ-bytesleft-br); 
						}
						bytesleft=MP3_FILE_BUF_SZ;  
						readptr=buffer; 
					} 	
 					while(audiodev.status&(1<<1))//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
					{			 
						rt_thread_delay (5);
						//mp3_get_curtime(audiodev.file,mp3ctrl); 
						u32 fpos=0;  	 
						if(data_ptr>data)fpos=data_ptr-data;	//<2F>õ<EFBFBD><C3B5><EFBFBD>ǰ<EFBFBD>ļ<EFBFBD><C4BC><EFBFBD><EFBFBD>ŵ<EFBFBD><C5B5>ĵط<C4B5> 
						mp3ctrl->cursec=fpos*mp3ctrl->totsec/(size-mp3ctrl->datastart);	//<2F><>ǰ<EFBFBD><C7B0><EFBFBD>ŵ<EFBFBD><C5B5>ڶ<EFBFBD><DAB6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>?	
						audiodev.totsec=mp3ctrl->totsec;	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
						audiodev.cursec=mp3ctrl->cursec;
						audiodev.bitrate=mp3ctrl->bitrate;
						audiodev.samplerate=mp3ctrl->samplerate;
						audiodev.bps=16;//MP3<50><33>֧<EFBFBD><D6A7>16λ
 						if(audiodev.status&0X01)break;//û<>а<EFBFBD><D0B0><EFBFBD><EFBFBD><EFBFBD>ͣ 
					}
					if((audiodev.status&(1<<1))==0)//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>/<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
					{  
						res=AP_NEXT;//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϼ<EFBFBD>ѭ<EFBFBD><D1AD>
						outofdata=1;//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>ѭ<EFBFBD><D1AD>
						break;
					}  
				}					
			}  
		}
		//audio_stop();//<2F>ر<EFBFBD><D8B1><EFBFBD>Ƶ<EFBFBD><C6B5><EFBFBD><EFBFBD>
	}else res=AP_ERR;//<2F><><EFBFBD><EFBFBD>
	MP3FreeDecoder(mp3decoder);		//<2F>ͷ<EFBFBD><CDB7>ڴ<EFBFBD>	
	if (mp3ctrl->jpeg_data) myfree(mp3ctrl->jpeg_data);
	myfree(mp3ctrl);
	myfree(buffer);
	myfree(audiodev.i2sbuf1);
	myfree(audiodev.i2sbuf2);
	myfree(audiodev.tbuf);
	DAC_NormalDeInit (&dac);
	mp3ctrl=0;
	audiodev.cursec=0;
	audiodev.totsec=0;
	return res;
}


// <20><>ȡ<EFBFBD><C8A1>ǰ<EFBFBD><C7B0><EFBFBD>ŵ<EFBFBD><C5B5><EFBFBD>Ŀ<EFBFBD><C4BF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ط<EFBFBD>0<EFBFBD>ɹ<EFBFBD>
char *mp3_get_name(void)
{
    if(mp3ctrl)
        return (char *)mp3ctrl->title;
    else return 0;
}


// <20><>ȡ<EFBFBD><C8A1>ǰ<EFBFBD><C7B0><EFBFBD>ŵ<EFBFBD><C5B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ң<EFBFBD><D2A3><EFBFBD><EFBFBD>ط<EFBFBD>0<EFBFBD>ɹ<EFBFBD>
char *mp3_get_artist(void)
{
    if(mp3ctrl)
        return (char *)mp3ctrl->artist;
    else return 0;
}


// <20><>ȡ<EFBFBD><C8A1>ǰ<EFBFBD><C7B0><EFBFBD>ŵ<EFBFBD>ʱ<EFBFBD>䣬<EFBFBD><E4A3AC><EFBFBD><EFBFBD>1<EFBFBD>ɹ<EFBFBD>
int mp3_get_time(int *totsec,int *cursec)
{
    if(mp3ctrl)
    {
        if(totsec) *totsec=mp3ctrl->totsec;
        if(cursec) *cursec=mp3ctrl->cursec;
        return 1;
    }
    else 
    {
        return 0; 
    }        
}



__audiodev *mp3_getAudiodev (void)
{
	return &audiodev;
}

__mp3ctrl *mp3_getMp3Info (void)
{
	return mp3ctrl;
}



void mp3_stop (void)
{
	mp3_getAudiodev()->status=0;
}


void mp3_play (void)
{
	//<2F><>ͣ<EFBFBD><CDA3>
	if (mp3_getAudiodev()->status&1)
	{
		mp3_getAudiodev()->status&=(~1);
	}
	//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	else
	{
		mp3_getAudiodev()->status|=1;
	}
}


void mp3_suspend (void)
{
	mp3_getAudiodev()->status|=1;
}

// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
int mp3_set_vol(int vol)
{
    if(vol>MP3_VOL_MAX) vol=MP3_VOL_MAX;
    else if(vol<0) vol=0;
    
    g_vol=vol;
    return 0;
}

// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
int mp3_add_val(int vol)
{
    vol=vol+g_vol;
    if(vol>MP3_VOL_MAX) vol=MP3_VOL_MAX;
    else if(vol<0) vol=0;
    
    g_vol=vol;
    return 0;
}


// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
int mp3_sub_val(int vol)
{
    vol=g_vol-vol;
    if(vol>MP3_VOL_MAX) vol=MP3_VOL_MAX;
    else if(vol<0) vol=0;
    
    g_vol=vol;
    return 0;
}



// <20><>ȡ<EFBFBD><C8A1><EFBFBD><EFBFBD>
int mp3_get_vol(void)
{
    return g_vol;
}