audenc1_copy.c

TI Algorithm Soft Kit 5.10 仅包括实例及其原代码

/* 
 *  Copyright 2006
 *  Texas Instruments Incorporated
 *
 *  All rights reserved.  Property of Texas Instruments Incorporated
 *  Restricted rights to use, duplicate or disclose this code are
 *  granted through contract.
 * 
 */
/*
 *  ======== audenc1_copy.c ========
 *  Audio encoder "copy" algorithm.
 *
 *  This file contains an implementation of the IALG interface
 *  required by xDAIS.
 */
#include <xdc/std.h>
#include <string.h>

#include <ti/xdais/dm/iaudenc1.h>

#include "audenc1_copy_ti.h"
#include "audenc1_copy_ti_priv.h"

/* buffer definitions */
#define MININBUFS       1
#define MINOUTBUFS      1
#define MININBUFSIZE    1
#define MINOUTBUFSIZE   1

extern IALG_Fxns AUDENC1COPY_TI_IALG;

#define IALGFXNS  \
    &AUDENC1COPY_TI_IALG,/* module ID */                         \
    NULL,               /* activate */                          \
    AUDENC1COPY_TI_alloc,/* alloc */                             \
    NULL,               /* control (NULL => no control ops) */  \
    NULL,               /* deactivate */                        \
    AUDENC1COPY_TI_free, /* free */                              \
    AUDENC1COPY_TI_initObj, /* init */                              \
    NULL,               /* moved */                             \
    NULL                /* numAlloc (NULL => IALG_MAXMEMRECS) */

/*
 *  ======== AUDENC1COPY_TI_IAUDENCCOPY ========
 *  This structure defines TI's implementation of the IAUDENC1 interface
 *  for the AUDENC1COPY_TI module.
 */
IAUDENC1_Fxns AUDENC1COPY_TI_AUDENCCOPY = {    /* module_vendor_interface */
    {IALGFXNS},
    AUDENC1COPY_TI_process,
    AUDENC1COPY_TI_control,
};

/*
 *  ======== AUDENC1COPY_TI_IALG ========
 *  This structure defines TI's implementation of the IALG interface
 *  for the AUDENC1COPY_TI module.
 */
#ifdef _TI_

asm("_AUDENC1COPY_TI_IALG .set _AUDENC1COPY_TI_AUDENCCOPY");

#else

/*
 *  We duplicate the structure here to allow this code to be compiled and
 *  run non-DSP platforms at the expense of unnecessary data space
 *  consumed by the definition below.
 */
IALG_Fxns AUDENC1COPY_TI_IALG = {      /* module_vendor_interface */
    IALGFXNS
};

#endif

/*
 *  ======== AUDENC1COPY_TI_alloc ========
 */
Int AUDENC1COPY_TI_alloc(const IALG_Params *algParams,
    IALG_Fxns **pf, IALG_MemRec memTab[])
{
    /* Request memory for my object */
    memTab[0].size = sizeof(AUDENC1COPY_TI_Obj);
    memTab[0].alignment = 0;
    memTab[0].space = IALG_EXTERNAL;
    memTab[0].attrs = IALG_PERSIST;

    return (1);
}

/*
 *  ======== AUDENC1COPY_TI_free ========
 */
Int AUDENC1COPY_TI_free(IALG_Handle handle, IALG_MemRec memTab[])
{
    AUDENC1COPY_TI_alloc(NULL, NULL, memTab);
    return (1);
}

/*
 *  ======== AUDENC1COPY_TI_initObj ========
 */
Int AUDENC1COPY_TI_initObj(IALG_Handle handle,
    const IALG_MemRec memTab[], IALG_Handle p,
    const IALG_Params *algParams)
{
    return (IALG_EOK);
}

/*
 *  ======== AUDENC1COPY_TI_process ========
 */
XDAS_Int32 AUDENC1COPY_TI_process(IAUDENC1_Handle h, XDM_BufDesc *inBufs,
    XDM_BufDesc *outBufs, IAUDENC1_InArgs *inArgs, IAUDENC1_OutArgs *outArgs)
{
    XDAS_Int32 minSamples;

    /* validate arguments - this codec only supports "base" xDM. */
    if ((inArgs->size != sizeof(*inArgs)) ||
        (outArgs->size != sizeof(*outArgs))) {

        return (IAUDENC1_EUNSUPPORTED);
    }

    /* outArgs->bytesGenerated reports the total number of bytes encoded */
    outArgs->bytesGenerated = 0;

    /*
     * This copy codec only "encodes" a single input buffer into a
     * single output buffer.  Also, given a different size of an input
     * and output buffers, only encode (i.e., copy) the lesser of the
     * sizes.
     */
    if (inBufs->numBufs >= 1 && outBufs->numBufs >= 1) {

        /* there's an available in and out buffer, how many samples? */
        minSamples = inBufs->bufSizes[0] < outBufs->bufSizes[0] ?
            inBufs->bufSizes[0] : outBufs->bufSizes[0];

        /* process the data: read input, produce output */
        memcpy(outBufs->bufs[0], inBufs->bufs[0], minSamples);

        outArgs->bytesGenerated = minSamples;
    }

    /* Fill out the rest of the outArgs struct */
    outArgs->extendedError = 0;
    outArgs->numZeroesPadded = 0;      /* TODO */

    return (IAUDENC1_EOK);
}

/*
 *  ======== AUDENC1COPY_TI_control ========
 */
XDAS_Int32 AUDENC1COPY_TI_control(IAUDENC1_Handle handle, IAUDENC1_Cmd id,
    IAUDENC1_DynamicParams *params, IAUDENC1_Status *status)
{
    XDAS_Int32 retVal;

    /* validate arguments - this codec only supports "base" xDM. */
    if ((params->size != sizeof(*params)) ||
        (status->size != sizeof(*status))) {

        return (IAUDENC1_EUNSUPPORTED);
    }

    switch (id) {
        case XDM_GETSTATUS:
        case XDM_GETBUFINFO:
            status->extendedError = 0;
            status->validFlag = XDAS_TRUE;
            status->lfeFlag = XDAS_FALSE;   /* TODO */
            status->bitRate = 0;  /* TODO */
            status->sampleRate = 0;  /* TODO */
            status->channelMode = IAUDIO_2_0;  /* TODO */
            status->encMode = IAUDIO_CBR;   /* TODO */

            status->bufInfo.minNumInBufs = MININBUFS;
            status->bufInfo.minNumOutBufs = MINOUTBUFS;
            status->bufInfo.minInBufSize[0] = MININBUFSIZE;
            status->bufInfo.minOutBufSize[0] = MINOUTBUFSIZE;

            retVal = IAUDENC1_EOK;

            break;

        case XDM_RESET:
        case XDM_FLUSH:
            retVal = IAUDENC1_EOK;
            break;

        default:
            /* unsupported cmd */
            retVal = IAUDENC1_EUNSUPPORTED;

            break;
    }

    return (retVal);
}
/*
 *  @(#) ti.xdais.dm.examples.audenc1_copy; 1,0,0,7; 10-18-2006 19:11:52; /db/wtree/library/trees/dais-g07x/src/
 */