globals.h

基于EP7312的MP3播放器源代码,包括MCU和PC端代码.

//****************************************************************************
//
// GLOBALS.H - Contains global definitions and function prototypes for the
//             Internet audio player application.
//
// Copyright (c) 1999,2000,2001 Cirrus Logic, Inc.
//
//****************************************************************************
#include "buffer/buffer.h"
#include "fat/fat.h"
#include "../config.h"

//****************************************************************************
//
// The maximum number of tracks supported by the player.
//
//****************************************************************************
#define MAX_TRACKS                              100

//****************************************************************************
//
// The following values define the flags contained in the system flags
// variable.
//
//****************************************************************************
#define SYSFLAG_KEYBOARD_COUNT_MASK             0x00000007
#define SYSFLAG_PROCESS_OUTPUT                  0x00000008
#define SYSFLAG_START_DOWNLOAD                  0x00000010
#define SYSFLAG_INPUT_ENABLED                   0x00000020
#define SYSFLAG_OUTPUT_ENABLED                  0x00000040
#define SYSFLAG_MEDIA_INSERT                    0x00000080
#define SYSFLAG_MEDIA_REMOVE                    0x00000100
#define SYSFLAG_REPEAT_MASK                     0x00000600
#define SYSFLAG_REPEAT_OFF                      0x00000000
#define SYSFLAG_REPEAT_ONE                      0x00000200
#define SYSFLAG_REPEAT_ALL                      0x00000400
#define SYSFLAG_REPEAT_SHIFT                    9

//****************************************************************************
//
// The following values are the IOCTLs which are sent to the individual codec
// drivers.
//
//****************************************************************************
enum
{
    IOCTL_CODEC_GETNAME,
    IOCTL_CODEC_GETARTIST,
    IOCTL_CODEC_GETTITLE,
    IOCTL_CODEC_GETBITRATE,
    IOCTL_CODEC_GETSAMPLERATE,
    IOCTL_CODEC_GETCHANNELS,
    IOCTL_CODEC_GETLENGTH,
    IOCTL_CODEC_GETTIME,
    IOCTL_CODEC_QUERY,
    IOCTL_CODEC_OPEN,
    IOCTL_CODEC_GETCAPTUREBUFFER,
    IOCTL_CODEC_SETBUFFER,
    IOCTL_CODEC_CAN_DECODE,
    IOCTL_CODEC_DECODE,
    IOCTL_CODEC_CAN_ENCODE,
    IOCTL_CODEC_ENCODE,
    IOCTL_CODEC_SEEK,
    IOCTL_CODEC_CLOSE
};

//****************************************************************************
//
// The following are the flags passed to CodecOpen.
//
//****************************************************************************
#define CODEC_OPEN_ENCODE                       0x00000001
#define CODEC_OPEN_DECODE                       0x00000002

//****************************************************************************
//
// The following values are the IOCTLs which are sent to the individual
// file system drivers.
//
//****************************************************************************
enum
{
    IOCTL_FS_INIT,
    IOCTL_FS_GETMEDIAID,
    IOCTL_FS_GETMEDIANAME,
    IOCTL_FS_OPEN,
    IOCTL_FS_CREATE,
    IOCTL_FS_READ,
    IOCTL_FS_READ_BS,
    IOCTL_FS_WRITE,
    IOCTL_FS_SEEK,
    IOCTL_FS_TELL,
    IOCTL_FS_LENGTH,
    IOCTL_FS_GETDATE,
    IOCTL_FS_CLOSE,
    IOCTL_FS_DELETE,
    IOCTL_FS_OPENDIR,
    IOCTL_FS_READDIR,
    IOCTL_FS_CLOSEDIR,
    IOCTL_FS_MAKEDIR,
    IOCTL_FS_REMOVEDIR,
    IOCTL_FS_TOTALSPACE,
    IOCTL_FS_FREESPACE,
    IOCTL_FS_FORMAT
};

//****************************************************************************
//
// The following are the flags passed to FSOpen.
//
//****************************************************************************
#define FS_OPEN_READ                            0x00000001
#define FS_OPEN_WRITE                           0x00000002
#define FS_OPEN_CREATE                          0x00000004
#define FS_OPEN_DECRYPT                         0x00000008

//****************************************************************************
//
// The following are the types passed to FSReadDir.
//
//****************************************************************************
#define FS_TYPE_FILE                            0x00000001
#define FS_TYPE_SUBDIR                          0x00000002

//****************************************************************************
//
// The following structure contains the persistent state of an opened file.
// Only the file system specific state for the file system(s) actually used
// need to be defined in the union uInternal.
//
//****************************************************************************
typedef struct
{
    unsigned char ucDrive;
    unsigned char ucFlags;
    unsigned short usUnused;
#ifdef SUPPORT_RIGHTS_PD
    unsigned long ulHeaderSize;
    void *pvRPDUS;
    void *pvRPDCS;
    void *pvRPDRD;
#endif
    union
    {
        tFATFile sFATFile;
    } uInternal;
} tFile;

//****************************************************************************
//
// The following structure contains the persistent state of an opened
// directory.  Only the file system specific state for the file system(s)
// actually used need to be defined in union uInternal.
//
//****************************************************************************
typedef struct
{
    unsigned char ucDrive;
    unsigned char ucUnused1, ucUnused2, ucUnused3;
    union
    {
        tFATDir sFATDir;
    } uInternal;
} tDir;

//****************************************************************************
//
// The following are the various modes which can be passed to UISetMode.
//
//****************************************************************************
enum
{
    MODE_POWER_OFF,
    MODE_POWER_ON,
    MODE_DOWNLOAD,
    MODE_STOP,
    MODE_PLAY,
    MODE_PAUSE,
    MODE_RECORD,
    MODE_LOOPBACK
};

//****************************************************************************
//
// The following are the bitmasks for the logical buttons which can be
// returned by UIGetButtons.
//
//****************************************************************************
#define BUTTON_PLAY                             0x00000001
#define BUTTON_PAUSE                            0x00000002
#define BUTTON_STOP                             0x00000004
#define BUTTON_FFWD                             0x00000008
#define BUTTON_REW                              0x00000010
#define BUTTON_NEXT                             0x00000020
#define BUTTON_PREV                             0x00000040
#define BUTTON_POWER                            0x00000080
#define BUTTON_RECORD                           0x00000100
#define BUTTON_LOOPBACK                         0x00000200
#define BUTTON_SEEK_RATE_ACC1                   0x01000000
#define BUTTON_SEEK_RATE_ACC2                   0x02000000
#define BUTTON_SEEK_RATE_ACC3                   0x04000000

//****************************************************************************
//
// Definitions for the bit fields of each entry of the pusTracks array.
//
//****************************************************************************
#define TRACK_FILE_MASK                         0x03ff
#define TRACK_CODEC_MASK                        0x7c00
#define TRACK_DRIVE_MASK                        0x8000
#define TRACK_FILE_SHIFT                        0
#define TRACK_CODEC_SHIFT                       10
#define TRACK_DRIVE_SHIFT                       15

//****************************************************************************
//
// Function prototypes and global variables.
//
//****************************************************************************

//
// From aac.c
//
extern unsigned long AACIoctl(unsigned long ulIoctl, unsigned long ulParam1,
                              unsigned long ulParam2, unsigned long ulParam3,
                              unsigned long ulParam4);

//
// From acelpnet.c
//
extern unsigned long ACELPnetIoctl(unsigned long ulIoctl,
                                   unsigned long ulParam1,
                                   unsigned long ulParam2,
                                   unsigned long ulParam3,
                                   unsigned long ulParam4);

//
// From audible.c
//
extern void AudibleLoadMetaData(unsigned long ulDrive,
                                const unsigned short *pusFileName);
extern void AudibleUpdateMetaData(unsigned char *pucBuffer,
                                  unsigned long ulNewPosition);
extern unsigned long AudibleIsAudibleProgram(void);
extern const unsigned short *AudibleGetTitle(void);
extern unsigned long AudibleGetNumSections(void);
extern unsigned long AudibleGetPreviousSection(unsigned long ulTime);
extern unsigned long AudibleGetNextSection(unsigned long ulTime);
extern void AudibleSetPlayedThrough(void);

//
// From codec.c
//
extern unsigned long CodecFindRIFFChunk(unsigned char *pucData,
                                        unsigned long ulLength,
                                        unsigned long ulIdx, char *pcName);
extern unsigned long CodecIsASFFile(tFile *pFile, unsigned char *pucData);
extern unsigned long CodecFindASFChunk(tFile *pFile, unsigned char *pucData,
                                       const unsigned char *pucChunkGUID);
extern unsigned long CodecQuery(unsigned long ulCodec, tFile *pFile,
                                unsigned char *pucScratch);
extern unsigned long CodecOpen(unsigned long ulCodec, unsigned long ulFlags,
                               tFile *pFile);
extern unsigned long CodecGetIndex(unsigned long *pulIndex);
extern unsigned long CodecGetName(const unsigned short **ppusName);
extern unsigned long CodecGetNameByIndex(unsigned long ulIndex,
                                         const unsigned short **ppusName);
extern unsigned long CodecGetArtist(const unsigned short **ppusName);
extern unsigned long CodecGetTitle(const unsigned short **ppusName);
extern unsigned long CodecGetBitRate(unsigned long *pulBitRate);
extern unsigned long CodecGetSampleRate(unsigned long *pulSampleRate);
extern unsigned long CodecGetChannels(unsigned long *pulChannels);
extern unsigned long CodecGetLength(unsigned long *pulLength);
extern unsigned long CodecGetTime(unsigned long *pulTime);
extern unsigned long CodecGetCaptureBuffer(short **ppsBuffer, long *plLength);
extern unsigned long CodecSetBuffer(BufferState *psBuffer);
extern unsigned long CodecCanDecode(void);
extern unsigned long CodecDecode(void);
extern unsigned long CodecCanEncode(void);
extern unsigned long CodecEncode(void);
extern unsigned long CodecSeek(unsigned long ulTime);
extern unsigned long CodecClose(void);

//
// From dai.c
//
extern void DAIInit(void);
extern void DAIEnable(void);
extern void DAIDisable(void);
extern BufferState *DAIGetPlayBuffer(void);
extern BufferState *DAIGetRecordBuffer(void);

//
// From fatfs.c
//
extern unsigned long FATIoctl(tFAT *pFAT, unsigned char *pucScratch,
                              unsigned char *pucWriteBuffer,
                              unsigned long ulIoctl, unsigned long ulInstance,
                              unsigned long ulParam1, unsigned long ulParam2);

//
// From fs.c
//
extern void FSInit(void);