h 265 pc解码库软件api参考

客户服务电话 客户服务传真 客户服务邮箱 目 图4-1按流方式解码API函数使用流程 图4-2按帧方式解码API函数使用流程 表1-1解码库开发包组 表1-2解码库运行环 本文以Hi3516A描述为例，未有特殊说明，Hi3516DHi3516A

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1 解码库内部完成了H.265解码的主要流程，并对外提供了灵活简单的API，用户可快开发应用程序。解码库的主要组件及相关说明如表1-1所示。API32-32-64-64-WindowsXP、Windows7、Windows8IntelAMDVisualStudioVisualStudioVisualStudioWindowsXPWindows7Windows7Windows8Windows8Windows无IntelCPUIntelCPUAMDAxCPUIntel45679-------0果图像不包含B帧，则可以使用解码序输出模式以降低输出时延。INT32IHW265D_Delete(IH265DEC_HANDLE--0---0INT32IHW265D_DecodeFrame(IH265DEC_HANDLEhDecoder,----码流长度（字节为单位）--IH265D_DECODE_END-----------原始码流长度（字节数）--255-255---输出当前帧信息包含一帧中各种类型CU的个数。01uiStreamLen。正常情况下解码模式配置为IH265D_DECODE。如果函数返回理存储在pstOutArgs中的图像。IH265D_NO_PICTURE，表示解INT32IHW265D_DecodeAU(IH265DEC_HANDLEhDecoder,*pstInArgs,IH265DEC_OUTARGS--------------输出当前帧信息包含一帧中各种类型CU的个数。0

3typedefsigned typedefsigned typedefsignedint typedefunsignedchar typedefunsignedshort typedefunsignedint typedefunsigned typedef typedefvoid*(*IHWVIDEO_ALG_MALLOC_FXN)(UINT32uiChannelID,UINT32typedefvoid(*IHWVIDEO_ALG_FREE_FXN)(UINT32uiChannelID,void*pMem);typedefvoid(*IHWVIDEO_ALG_LOG_FXN)(UINT32uiChannelID,IHWVIDEO_ALG_LOG_LEVELeLevel,INT8*pszMsg,...);typedefenum{IH265D_SINGLE_THREAD=0, /*单线程*/ /*多线程}typedefenum{IH265D_DECODE_ORDER=0, /*按解码序输出*/ /*按显示序输出*/}typedefenum{IH265D_DECODE /* }typedefenum{IH265D_FRAME_I=0,}typedefenum{IH265D_GETDISPLAY=0, /*已经解码出一帧并输出，可用于显示*/ /*解码器没有图像输出，需要更多的码流*/ /*解码完毕，已经输出全部图像*/ /*句柄错误*/}/*typedefstruct{/*/*/*/*HW265D_THREADTYPEeThreadType; /*线程类型*/HW265D_OUTPUTORDEReOutputOrder; /*输出顺序，仅在DecodeFrame有效， /*用户数据*/IHWVIDEO_ALG_MALLOC_FXNMallocFxn;/*分配内存回调函数*/ FreeFxn; /*释放内存回调函数*/ /*日志回调函数*/typedefstructtagIH265DEC_INARGS{UINT8 /*UINT32 /*UINT64 /*HW265D_DECODEMODEeDecodeMode;/*0：正常模式；1：Flush/*typedefstruct{/*/*/*/*HW265D_DECODESTATUSeDecodeStatus;/*/*/*/*/*/*图像YUV3/* ///vui /* //vps uiVpsNumUnitsInTick;/* ///*///*/*typedefstruct{UINT32uiUserDataType;/*用户数据类型*/UINT32uiUserDataSize;/*用户数据长度*/UINT8 /*用户数据缓冲区structtagHW265D_USERDATA*pNext;/*/*typedefstruct{ cVersionChar[IHWVIDEO_ALG_VERSION_LENGTH];/*版本号*/ /*编译时间*/UINT32 /*/*每帧图像各种CU数量信息*/typedefstructtagCU_OUTPUT_INFO{4x4CUnumber8x8CUnumber16x16CU32x32CU64x64CU4x4CUnumber8x8CUnumberUINT32uiCuNumPcm16; /*IPCM16x16CUnumber*/UINT32uiCuNumPcm32; /*IPCM32x32CUnumber*/UINT32uiCuNumPcm64; /*IPCM64x64CUnumber*/UINT32uiCuNumInter8; /*inter8x8CUnumber*/UINT32uiCuNumInter16; /*inter16x16CUnumber*/UINT32uiCuNumInter32; /*inter32x32CUnumber*/UINT32uiCuNumInter64; /*inter64x64CUnumber*/UINT32uiCuNumSkip8; /*skip8x8CUnumber*/UINT32uiCuNumSkip16; /*skip16x16CUnumber*/UINT32uiCuNumSkip32; /*skip32x32CUnumber*/UINT32 /*skip64x64CUnumber是否否是读取到码流长度为输入输入始位置为buffer0，码流长度为否输出是输出是否void*HW265D_Malloc(UINT32channel_id,UINT32{return(void}voidHW265D_Free(UINT32channel_id,void*{}voidHW265D_Log(UINT32channel_id,IHWVIDEO_ALG_LOG_LEVELeLevel,*p_msg,{}INT32H265DecLoadAU(UINT8*pStream,UINT32iStreamLen,UINT32*{UINT32UINT32state=0xffffffff;BOOL32*pFrameLen=if(NULL==pStream||iStreamLen<={return-}for(i=0;i<iStreamLen;{if((state&0xFFFFFF7E)>=0x100&&(state&0xFFFFFF7E)<=0x13E){if(1==bFrameStartFound{if((pStream[i+1]>>7)=={*pFrameLen=i-4;return0;}}{bFrameStartFound=}}/*findavps,sps,if((state&0xFFFFFF7E)==0x140||(state&0xFFFFFF7E)==0x142||(state&0xFFFFFF7E)==0x144){if(1=={*pFrameLen=i-4;return0;}{bFrameStartFound=}}state=(state<<8)|}*pFrameLen=i;return-1;}intmain(intargc,unsignedchar**{FILE*fpInFile=NULL;FILE*fpOutFile=NULL;INT32iRet=0;UINT8*pInputStream=NULL,*pStream;UINT32uiChannelId=0;UINT32iFrameIdx=0;BOOL32bStreamEnd=0;INT32iFileLen;IH265DEC_HANDLEhDecoder=IHW265D_INIT_PARAMstInitParam={0};IH265DEC_INARGSstInArgs;IH265DEC_OUTARGSstOutArgs={0};/*openinputstreamfileandoutputyuvfile*/fpInFile=fopen(argv[1],"rb");fpOutFile=fopen(argv[2],if(NULL==fpInFile||NULL=={fprintf(stderr,"Unabletoopenh265streamfile%soryuvfile%s.\n",argv[1],goto}printf("decodingfile:%s...\n",printf("saveyuvfile:%s...\n",/*mallocstreambuffer*/fseek(fpInFile,0,SEEK_END);iFileLen=ftell(fpInFile);fseek(fpInFile,0,SEEK_SET);pInputStream=(unsignedchar*)malloc(iFileLen);if(NULL==pInputStream){fprintf(stderr,"Mallocfailed!\n");gotoexitmain;}/*createdecodehandle*/ =0; = = = =IH265D_SINGLE_THREAD; //or =IH265D_DECODE_ORDER; //or =HW265D_Malloc; =HW265D_Free; =iRet=IHW265D_Create(&hDecoder,&stInitParam);if(IHW265D_OK!=iRet){fprintf(stderr,"Unabletocreatedecoder.\n");gotoexitmain;}/*readH.265streamtostreambuffer*/fread(pInputStream,1,iFileLen,fpInFile);pStream=pInputStream;/*decodeprocess*/while(!bStreamEnd){INT32stInArgs.eDecodeMode=(iNaluLen>0)?IH265D_DECODE: =pStream;pStream+=iNaluLen;iFileLen-=stOutArgs.eDecodeStatus=-stOutArgs.uiBytsConsumed={//whendecoderisempty,exitloop;if(stOutArgs.eDecodeStatus==IH265D_NO_PICTURE){bStreamEnd=1;}//outputoneif(stOutArgs.eDecodeStatus=={//saveyuvtooutputfileif(fpOutFile!=NULL){UINT32for(i=0;i<stOutArgs.uiDecHeight;{fwrite(stOutArgs.pucOutYUV[0]+i*stOutArgs.uiYStride,1,stOutArgs.uiDecWidth,fpOutFile);}for(i=0;i<((stOutArgs.uiDecHeight)>>1);{}for(i=0;i<((stOutArgs.uiDecHeight)>>1);{}}}//continuetodecodetherestofstream +=stOutArgs.uiBytsConsumed; -=iRet=IHW265D_De