id3.c

凌阳MP3 spSPCA755yuanma

/*============================================================================
Copyright (c) 2001 Sunplus Technology Co., Ltd.
Module Name:          FileHeadNDID3.c
Abstract:             Module related to main routine
Environment:          Keil C51 Compiler
Revision History:     11/13/2002    XYQ    created
=============================================================================*/
//=============================================================================
//=============Header file
#include "general.h"
#include "doslink.h"
#include "dosusr.h"
#include "cardimpt.h"
#include "ID3.H"


//=============================================================================
//extern variable
extern unsigned int     xdata G_searchCluster;
extern unsigned int     xdata G_CurrentFile_StartCluster;
//=============================================================================

#if (ID3Tag_OPTION==1) 
//=========================================================================================
//local variable

//=========================================================================================
//add by XYQ 021120
void USR_ReadID3Frame(unsigned long *DATA_LogAddr,unsigned long *FilePoint,unsigned char *array,unsigned int arrayLength, bit FillArray)
{
	unsigned int i,j;

	if(!arrayLength) return;//不读就还回。

	for((j=0,i=*FilePoint%K_DOS_SectorSize); (i<K_DOS_SectorSize && j<arrayLength); (j++,i++))
	{
		if(FillArray) array[j] = G_ucDataBuffer[i];
//		DbgPrint("%c",G_ucDataBuffer[i]);
//		DbgPrint("\nj1==%x\n",j);
	}
	while((j<arrayLength) || !((*FilePoint+j)%K_DOS_SectorSize))//!((*FilePoint+j)%K_DOS_SectorSize)意思是先把下一个sector读出来
	{
		if((*FilePoint+j)%G_DOS_ClusterSize)
		{
			*DATA_LogAddr = *DATA_LogAddr + 512;
		}else{
			G_searchCluster=DOS_GetNextCluster(G_searchCluster);
			if(G_searchCluster==0) break;
			*DATA_LogAddr = DOS_ClusterLogAddr(G_searchCluster);
		}
		DOS_ReadSector(K_DOS_DstSram, *DATA_LogAddr, 0);
		for(i=0;(i<K_DOS_SectorSize && j<arrayLength); (i++,j++))
		{
			if(FillArray) array[j] = G_ucDataBuffer[i];
//			DbgPrint("%c",G_ucDataBuffer[i]);
		}
//		DbgPrint("\nj2==%x\n",j);
		if(j>=arrayLength) break;
	}

	*FilePoint=*FilePoint+arrayLength;
//	DbgPrint("=============\n");
}
//=========================================================================================
//add by XYQ 021118
unsigned int USR_File_Read(unsigned long FilePoint, unsigned int *FileCluster, unsigned long *DATA_LogAddr)
{
	unsigned int CLUS_CNT;

	CLUS_CNT=(FilePoint)/G_DOS_ClusterSize;

	*FileCluster=G_CurrentFile_StartCluster;

	while(CLUS_CNT!=0)
	{
		*FileCluster=DOS_GetNextCluster(*FileCluster);
		CLUS_CNT--;
	}
	*DATA_LogAddr = DOS_ClusterLogAddr(*FileCluster) + (FilePoint)%G_DOS_ClusterSize;

	DOS_ReadSector(K_DOS_DstSram, *DATA_LogAddr, 0);

	return (unsigned int)((FilePoint)%K_DOS_SectorSize);
}
//=========================================================================================
//add by XYQ 021122
unsigned long X_Get_ID3V2_3_Frame(unsigned long FrameName,unsigned char *FrameBuff,unsigned char FrameBuffSize)
{
	unsigned long ID3V2_3_Size;

	union
	{
		unsigned char ID3V2Frame[10];
		struct
		{
			unsigned long ID;
			unsigned long Size;
			unsigned int  Flags;
		}ID3V2Frames;
	}U_Lable;

	unsigned long DATA_LogAddr;
	unsigned long FilePoint;
	bit SuccessFinish;


	SuccessFinish=0;
	USR_File_Read(0, &G_searchCluster,&DATA_LogAddr);
	if(G_ucDataBuffer[0]=='I' && G_ucDataBuffer[1]=='D' && G_ucDataBuffer[2]=='3')
	{
		//printf("found ID3 V2......\n");
		if(G_ucDataBuffer[3]==0x03 && G_ucDataBuffer[4]==0x00 && G_ucDataBuffer[5]==0x00)
		{//V2.3
			ID3V2_3_Size = ((unsigned long)G_ucDataBuffer[6]&0x7F)<<21 |             \
				((unsigned long)G_ucDataBuffer[7]&0x7F)<<14 |                        \
				((unsigned long)G_ucDataBuffer[8]&0x7F)<<7 | (G_ucDataBuffer[9]&0x7F);
			FilePoint=10;
			while(FilePoint < ID3V2_3_Size+10)
			{
				if(SuccessFinish)
				{
					return U_Lable.ID3V2Frames.Size;//找完了
				}
				USR_ReadID3Frame(&DATA_LogAddr, &FilePoint, U_Lable.ID3V2Frame, 10, 1);
				if(U_Lable.ID3V2Frames.ID==FrameName)
				{
					SuccessFinish=1;
				}
				/*
				switch(U_Lable.ID3V2Frames.ID)
				{
				case 0x54495432://"TIT2"歌曲名
				//	USR_ReadID3Frame(&DATA_LogAddr, &FilePoint, *FrameBuff,(U_Lable.ID3V2Frames.Size>=MaxID3BufferNum)?MaxID3BufferNum:U_Lable.ID3V2Frames.Size, 1);//读歌名，仅读前30 BYTE
				//	USR_ReadID3Frame(&DATA_LogAddr, &FilePoint, *FrameBuff,(U_Lable.ID3V2Frames.Size>MaxID3BufferNum)?(U_Lable.ID3V2Frames.Size-MaxID3BufferNum):0, 0);//空读操作,不填到数组里
					SuccessFinish=ID3V2_3_SongName;
					break;
				case 0x54504531://"TPE1"歌手名
				//	USR_ReadID3Frame(&DATA_LogAddr, &FilePoint, *FrameBuff,(U_Lable.ID3V2Frames.Size>=30)?30:U_Lable.ID3V2Frames.Size, 1);//读歌名，仅读前30 BYTE
				//	USR_ReadID3Frame(&DATA_LogAddr, &FilePoint, *FrameBuff,(U_Lable.ID3V2Frames.Size>MaxID3BufferNum)?(U_Lable.ID3V2Frames.Size-MaxID3BufferNum):0, 0);//空读操作,不填到数组里
					SuccessFinish=ID3V2_3_SingerName;
					break;
				default:
				//	USR_ReadID3Frame(&DATA_LogAddr, &FilePoint, SongNameNDSingerName,U_Lable.ID3V2Frames.Size, 0);//空读操作,不填到数组里
					break;
				}
				*/
				USR_ReadID3Frame(&DATA_LogAddr, &FilePoint, FrameBuff,(U_Lable.ID3V2Frames.Size>=FrameBuffSize)?FrameBuffSize:U_Lable.ID3V2Frames.Size, 1);//读FrameBuffZize
				USR_ReadID3Frame(&DATA_LogAddr, &FilePoint, FrameBuff,(U_Lable.ID3V2Frames.Size>FrameBuffSize)?(U_Lable.ID3V2Frames.Size-FrameBuffSize):0, 0);//空读操作,不填到数组里
			}
		}
	}
	return 0;//没找到
}
//=========================================================================================
bit X_Get_ID3V2_3()
{
	unsigned long DATA_LogAddr;

	USR_File_Read(0, &G_searchCluster,&DATA_LogAddr);
	if(G_ucDataBuffer[0]=='I' && G_ucDataBuffer[1]=='D' && G_ucDataBuffer[2]=='3')
	{
		DbgPrint("found ID3 V2......\n");
		if(G_ucDataBuffer[3]==0x03 && G_ucDataBuffer[4]==0x00 && G_ucDataBuffer[5]==0x00)
		{//V2.3
			return 1;
		}
	}
	else
		DbgPrint("Cannot found ID3 V2......\n");

	return 0;
}
//=========================================================================================
//add by XYQ 021122
bit X_Get_ID3V1_Info(unsigned char *FrameBuff,unsigned char FrameBuffSize)
{
	union
	{
		unsigned char V1TAG[4];
		unsigned long V1TAGValue;
	}U_Lable;

	unsigned long DATA_LogAddr;
	unsigned long FilePoint;
//	ID3V1
//	DbgPrint("Try found ID3 V1......\n");
	FilePoint=G_DOS_FileSize-128;
	USR_File_Read(FilePoint, &G_searchCluster,&DATA_LogAddr);

	USR_ReadID3Frame(&DATA_LogAddr, &FilePoint, U_Lable.V1TAG, 3, 1);

	if((U_Lable.V1TAGValue&0xffffff00)==0x54414700)//found 'TAG'
	{
		USR_ReadID3Frame(&DATA_LogAddr,&FilePoint,FrameBuff,FrameBuffSize, 1);
		return 1;//找到了
	}
	return 0;//没找到
}
//====================================================================================
unsigned char X_Get_LongFileName(unsigned char *FDB,unsigned char *FrameBuff,unsigned char FrameBuffSize)
{
	unsigned char X_Continue;
	unsigned char code UnicodeOffset[26]={2,1,4,3,6,5,8,7,10,9,15,14,17,16,19,18,21,20,23,22,25,24,29,28,31,30};

	X_Continue=0;

	if (FDB[0] != 0xe5 && FDB[0] != 0x00)
	{
		if (FDB[11] == 0x0F && FDB[12] == 0x00)
		{
			// long file name fdb
			if (FDB[0] & 0x40)
			{//the last fdb
				X_Continue=1;//long file name fdb over
			}else{
				X_Continue = 2;
			}
#if 1
			{
				unsigned char mm;
				for(mm=0;mm<26;mm++)
				{
					FrameBuff[mm]=FDB[UnicodeOffset[mm]];
//					DbgPrint("%c",FrameBuff[mm]);
				}
			}
#endif
		}
		else
		{
			//not long file name fdb
		}
	}
	//not long file name fdb
	return X_Continue;
}

#endif// End of ID3 Tag Supported