海思Hi3516DV300上播放G711U音频文件

在海思Hi3516DV300芯片运行Linux系统下，可通过如下函数来实现G711U音频文件的播放：

int ADecPlayVoiceFile(const char* filename)
{
    FILE* pfd;
    AUDIO_STREAM_S stStream;
    HI_S32 s32Ret,length,decLength,allLength = 0,aChn = 0;
    HI_U8 buf[SAMPLE_AUDIO_PTNUMPERFRM+4] = {0,1,0,0};

    pfd = fopen(filename, "rb");
    if (NULL == pfd)
    {
        printf("%s: open file %s failed\n", __FUNCTION__, filename);
        return -1;
    }

    memset(&stStream,0,sizeof(AUDIO_STREAM_S));
    fseek(pfd, 0, SEEK_END);
    length= ftell(pfd);
    fseek(pfd, 0, SEEK_SET);
    while(allLength < length)
    {
        decLength = (length - allLength)> SAMPLE_AUDIO_PTNUMPERFRM ? SAMPLE_AUDIO_PTNUMPERFRM:(length-allLength);
        decLength = fread(buf+4, 1, decLength, pfd);
        allLength += decLength;

        buf[2] = decLength/2;
        stStream.pStream = (HI_U8 *)buf;
        stStream.u32Len = decLength + 4;
        s32Ret = HI_MPI_ADEC_SendStream(aChn, &stStream, HI_TRUE);
        if (s32Ret)
        {
            printf("%s %d chn:%d  s32ret:%#x\n",__FUNCTION__, __LINE__, aChn, s32Ret);
            break;
        }
    }

    s32Ret = HI_MPI_ADEC_SendEndOfStream(aChn, HI_FALSE);
    if (HI_SUCCESS != s32Ret)
    {
        printf("%s: HI_MPI_ADEC_SendEndOfStream failed!\n", __FUNCTION__);
    }

    fclose(pfd);
    return s32Ret;
}

播放时，只需调用ADecPlayVoiceFile函数，传入G711U音频文件的路径即可。