OpenMax的read_media

我嘗試硬件讀取read_media組件http://home.nouwen.name/RaspberryPi/doc媒體文件... media.html 首先，我創建組件：OpenMax的read_media

// create read_media 
    if(status == 0 && ilclient_create_component(client, &read_media, "read_media",ILCLIENT_DISABLE_ALL_PORTS) != 0){status = -14; printf("=> ilclient_create_component() for read_media failed!!\n");exit(1);} 
    list[0] = read_media;

接下來，我創建PARAM：

OMX_PARAM_CONTENTURITYPE *in_file_uri;

然後我分配內存並建立uri文件：

//read_media 
    OMX_U8 *file_name="/home/pi/git_video/firmware/opt/vc/src/hello_pi/hello_video/test.h264"; 
      size_t lenght=strlen(file_name)+1; 
      size_t param_size=sizeof(OMX_PARAM_CONTENTURITYPE)+lenght-1; 
    //memset(&in_file_uri, 0,param_size); 
    in_file_uri=malloc(param_size); 
    in_file_uri->nSize = param_size; 
    in_file_uri->nVersion.nVersion = OMX_VERSION; 
    memcpy(in_file_uri->contentURI,file_name,lenght); 

    printf("==>URI: SIZE %d, %s \n",in_file_uri->nSize,in_file_uri->contentURI);

最後我設置參數爲rea d_media組件：

OMX_ERRORTYPE r=OMX_SetParameter(ILC_GET_HANDLE(read_media), OMX_IndexParamContentURI,in_file_uri); 
     if(r!=OMX_ErrorNone){printf("=> Failed set port params (read_media),error %f \n",r);status=-1;}

但是設置了元件提交的參數，有什麼錯？任何幫助我嗎？

來源

2013-02-04 Oleksandr Kyrpa