adapter/main.c

This is an example of how to use the ASX Adapter functions.

/* $Header: /home/eliot/asi/repo/cvsrepo/Repository/apps/asx/examples/adapter/main.c,v 1.6 2010/01/11 21:50:31 as-age Exp $ */
#include "stdio.h"
#include "stdlib.h"
#include "asx.h"

int CheckError(ASX_HANDLE hObj, int nLine);

ASX_HANDLE hSystem=0;

int main(int argc, char* argv[])
{

    ASX_ERROR asxError;
    int nAdapters=0;
    int i;

    // create the system
    ASX_System_Create(ASX_SYSTEM_TYPE_HPI,&hSystem);
    CheckError(hSystem, __LINE__);

    // find out how many adapters there are
    asxError = ASX_System_GetAdapterCount(hSystem,&nAdapters);
    CheckError(hSystem, __LINE__);
    printf("There are %d audio adapters in the system \n", nAdapters);

    // loop over the adapters
    for(i=0;i<nAdapters;i++)
    {
        char *pszAdapterName;
        ASX_HANDLE hAdapter;
        unsigned long lSerial;
        char *pszRevision;
        int nLen;
        int nIndex;
        int nDspUtilization;
        ASX_HANDLE hMixer;


        ASX_System_GetAdapter(hSystem,i,&hAdapter);
        CheckError(hSystem, __LINE__);

        ASX_Adapter_GetName(hAdapter,0,0,&nLen);
        CheckError(hAdapter, __LINE__);
        pszAdapterName = (char *)malloc(nLen);
        ASX_Adapter_GetName(hAdapter,pszAdapterName,nLen,&nLen);
        CheckError(hAdapter, __LINE__);
        printf("Adapter [%d] is %s \n", i,pszAdapterName);

        /* the adapter index is not the same as the loop index */
        ASX_Adapter_GetIndex(hAdapter, &nIndex);
        CheckError(hAdapter, __LINE__);
        printf("Index is %ld \n", nIndex);
        
        ASX_Adapter_GetSerialNumber(hAdapter,&lSerial);
        CheckError(hAdapter, __LINE__);
        printf("Serial is %ld \n", lSerial);

        pszRevision = (char *)malloc(ASX_SHORT_STRING);
        ASX_Adapter_GetHardwareRevision(hAdapter,pszRevision);
        CheckError(hAdapter, __LINE__);
        printf("Revision is %s \n", pszRevision);

        ASX_Adapter_GetDspUtilization(hAdapter,1,&nDspUtilization);
        CheckError(hAdapter, __LINE__);
        printf("Utilization is %d percent \n", nDspUtilization);

        free(pszAdapterName);
        free(pszRevision);
    }

    ASX_System_Delete(hSystem);
    printf("Press ENTER to exit\n");
    getchar();
    return 0;
}

int CheckError(ASX_HANDLE hObj, int nLine)
{
    int nError;
    int asxSubSystemErrorCode=0;
    char *pszAsxErrorString;
    char *pszAsxSubSystemErrorString;
    int nLen1,nLen2;

    ASX_Error_GetLast( hObj, &nError, &asxSubSystemErrorCode);
    if(!nError)
        return 0;
    ASX_Error_GetLastString( hObj, 0,0,&nLen1,0,0,&nLen2);
    pszAsxErrorString = (char *)malloc(nLen1);
    pszAsxSubSystemErrorString = (char *)malloc(nLen2);
    ASX_Error_GetLastString( hObj, pszAsxErrorString,nLen1,&nLen1,pszAsxSubSystemErrorString,nLen2,&nLen2);
    printf("Error: #%d, %s - Subsystem Error: #%ld, %s \n", 
        nError,  
        pszAsxErrorString, 
        asxSubSystemErrorCode, 
        pszAsxSubSystemErrorString );
    printf("When called from source %s line %d\n",__FILE__,nLine);

    printf("Press ENTER to exit\n");
    getchar();
    free(pszAsxErrorString);
    free(pszAsxSubSystemErrorString);
    ASX_System_Delete(hSystem);
    exit(1);
    return 1;
}