各位高手，小弟正在阅读TI为8168处理器提供的DVRRDK软件开发包。阅读过程中遇到以下这个结构体：
typedef struct VcapVencVdecVdis_IpcBitsCtrlFileObj {
FILE *fpWrHdr[MCFW_IPC_BITS_MAX_NUM_CHANNELS];
FILE *fpWrData[MCFW_IPC_BITS_MAX_NUM_CHANNELS];
FILE *fpWrMvData[MCFW_IPC_BITS_MAX_NUM_CHANNELS];
char fileDirPath[MCFW_IPC_BITS_MAX_PATH_LENGTH];
Bool wrapOccuredHdr[MCFW_IPC_BITS_MAX_NUM_CHANNELS];
Bool wrapOccuredBuf[MCFW_IPC_BITS_MAX_NUM_CHANNELS];
UInt32 maxFileSize;
Bool enableFWrite;
UInt32 fwriteEnableBitMask;
} VcapVencVdecVdis_IpcBitsCtrlFileObj;
请教其中wrapOccuredBuf成员的含义？以及wrapOccuredBuf成员与wrapOccuredHdr成员的区别？谢谢！
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