pmp3enc_lib.h

来自「瑞星微公司RK27XX系列芯片的SDK开发包」· C头文件 代码 · 共 59 行

#define MP3_MAX_PCM_LENGTH 1152
//****************************************************************************
//
// A structure which defines the persistent state of the MP3 decoder.
//
//****************************************************************************

#define PCM_BUFFER_SIZE    (2 * MP3_MAX_PCM_LENGTH)
#define ENCODED_DATA_SIZE    2048
#define ENCODED_DATA_WRITE_SIZE  1024
#define LEFT_PCM_BUFFER    pMP3ENC->psLeft
#define RIGHT_PCM_BUFFER    pMP3ENC->psRight

#define pENCODED_DATA     (pMP3ENC->pcEncodedData)

typedef struct
{

    // A pointer to the buffer containing the persistent internal state of the
    // MP3 encoder library.
    tMP3ENCInstance *pMPEGInstance;

    // The file from which we read data.
    // tFile *pFile;

    // A buffer to contain the encoded MP3 audio.
    char pcEncodedData[ENCODED_DATA_SIZE];

    // Buffers to contain the ADC samples

    short psLeft[PCM_BUFFER_SIZE];
    short psRight[PCM_BUFFER_SIZE];


    // The buffer to which we write decoded MP3 data.
    BufferState *pOutput;

    // The sample rate of the decoded PCM stream.
    unsigned short usSampleRate;

    // The number of channels in the file.
    unsigned char ucChannels;


    // The time length of the file.
    unsigned long ulTimeLength;

    // The bit rate of the MP3 file.
    unsigned long ulBitRate;

    // The number of samples which have been decoded.
    unsigned long ulTimePos;

} tMP3ENC;

extern unsigned short usBRMap[];
extern unsigned short usSRMap[];