g711_sun_ialg.c

TI Algorithm Soft Kit 5.10 仅包括实例及其原代码

/*
 *  Copyright 2006 by Texas Instruments Incorporated.
 *
 *  All rights reserved. Property of Texas Instruments Incorporated.
 *  Restricted rights to use, duplicate or disclose this code are
 *  granted through contract.
 *
 */

/*
 *  ======== g711_sun_ialg.c ========
 *  Implementation of the G711ENC_SUN.h interface; SUN's implementation
 *  of the IG711 interface.
 */
#include <xdc/std.h>
#include <ti/xdais/dm/isphenc.h>

#include <assert.h>

#include "g711enc_sun.h"
#include "g711_sun_internal.h"
#include "g711_sun_priv.h"

extern IALG_Fxns G711ENC_SUN_IALG;

/*
 *  ======== G711ENC_SUN_Obj ========
 */
typedef struct G711ENC_SUN_Obj {
    IALG_Obj alg;         /* MUST be first field of all xDAIS inst objs */
    Int frameLen;         /* frame length in samples.                   */
    Int inbufferSize;     /* Input Buffer size in bytes.                */
    Int bytesGenerated;   /* Output buffer size in bytes.               */
    Int rate;

} G711ENC_SUN_Obj;


#define IALGFXNS \
    &G711ENC_SUN_IALG,  /* module ID */                         \
    NULL,               /* activate */                          \
    G711ENC_SUN_alloc,  /* algAlloc */                          \
    NULL,               /* control (NULL => no control ops) */  \
    NULL,               /* deactivate */                        \
    G711ENC_SUN_free,   /* free */                              \
    G711ENC_SUN_initObj,   /* init */                              \
    NULL,               /* moved */                             \
    NULL                /* numAlloc */

/*
 *  ======== G711ENC_SUN_IG711ENC ========
 *  This structure defines SUN's implementation of the IG711 interface
 *  for the G711ENC_SUN module.
 */
ISPHENC_Fxns G711ENC_SUN_IG711ENC = {  /* module_vendor_interface */
    {IALGFXNS},
    G711ENC_SUN_encodeLin2Alaw,
    G711ENC_SUN_control,
};

/*
 *  ======== G711ENC_SUN_IALG ========
 *  This structure defines SUN's implementation of the IALG interface
 *  for the G711ENC_SUN module.
 */
#ifdef _TI_

asm("_G711ENC_SUN_IALG .set _G711ENC_SUN_IG711ENC");

#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 G711ENC_SUN_IALG = {  /* module_vendor_interface */
    IALGFXNS
};

#endif



/*
 *  ======== G711ENC_SUN_alloc ========
 *  Return a table of memory descriptors that describe the memory needed
 *  to construct a G711ENC_SUN_Obj structure.
 */
Int G711ENC_SUN_alloc(const IALG_Params *g711Params, IALG_Fxns **pf,
    IALG_MemRec memTab[])
{
    /* Request memory for G711 object */
    memTab[0].size = sizeof(G711ENC_SUN_Obj);
    memTab[0].alignment = 0;
    memTab[0].space = IALG_EXTERNAL;
    memTab[0].attrs = IALG_PERSIST;

    return (1);
}


/*
 *  ======== G711ENC_SUN_free ========
 *  Return a table of memory pointers that should be freed.  Note
 *  that this should include *all* memory requested in the
 *  G711ENC_SUN_alloc operation above.
 */
Int G711ENC_SUN_free(IALG_Handle handle, IALG_MemRec memTab[])
{
    Int n;

    n = G711ENC_SUN_alloc(NULL, NULL, memTab);

    return (n);
}

/*
 *  ======== G711ENC_SUN_initObj ========
 *  Initialize the memory allocated on our behalf (including our object).
 */
Int G711ENC_SUN_initObj(IALG_Handle handle, const IALG_MemRec memTab[],
        IALG_Handle p, const IALG_Params *g711Params)
{
    G711ENC_SUN_Obj *g711Enc = (Void *)handle;
/*     const IG711ENC_Params *params = (IG711ENC_Params *)g711Params; */

/*    g711Enc->frameLen = params->sphenc_params.inbufferSize / sizeof(MdUns); */
    g711Enc->bytesGenerated = 0;

    return (IALG_EOK);
}


/*
 *  ======== Implementation of the ISPHENC Interface Fxns ========
 *
 *  G711ENC_SUN_encodeLin2Alaw - implements ISPHENC::process() function.
 *      Args:
 *         input buffer pointer output buffer pointers.
 *             App sets pointers to NULL in case algorithm has to return
 *             this address to application.
 *         params: determines behaviour of basic encoding.
 *
 *
 *     Retuns:  status status structure.
 *               IALG_EOK for success or IALG_EFAIL for failure.
 */
XDAS_Int32 G711ENC_SUN_encodeLin2Alaw(ISPHENC_Handle handle,
    XDM_BufDesc *inBufs, XDM_BufDesc *outBufs,
    ISPHENC_InArgs *inArgs, ISPHENC_OutArgs *outArgs)
{
    Int i;

    short *in          =  (short *)inBufs->bufs[0];
    unsigned char *out = (unsigned char *)outBufs->bufs[0];

    Int frameLen = inBufs->bufSizes[0] / sizeof(short);

    for (i = 0; i < frameLen; i++) {
        *out++ = G711_SUN_linear2alaw(*in++);
    }

    if (outArgs) {
        outArgs->size = sizeof(*outArgs);
        outArgs->rate = 0;  /* TODO */;
        outArgs->frameType = 0;  /* TODO */
        outArgs->outbufferSize = frameLen * sizeof(unsigned char);
    }

    return (IALG_EOK);
}


/*
 *  ======== Implementation of the ISPHENC Interface Fxns ========
 *
 *  G711ENC_SUN_control: implements ISPHENC::control()
 *      Args:
 *          'id': Command id. XDM Cmds: SETPARAMS, GETSTATUS, RESET and FLUSH.
 *      Returns:
 *           IALG_EOK for success or IALG_EFAIL
 *
 */

XDAS_Int32 G711ENC_SUN_control(ISPHENC_Handle handle, ISPHENC_Cmd cmdId,
    ISPHENC_DynamicParams *dynParams, ISPHENC_Status *status)
{
    XDAS_Int32 retVal;
    G711ENC_SUN_Obj *g711Enc = (Void *)handle;

    switch (cmdId) {

        case XDM_GETSTATUS:
            assert(status != NULL);
            status->frameSize = g711Enc->frameLen;
            /* TODO ... status->bufInfo = ... */

            retVal = IALG_EOK;
            break;

        case XDM_SETPARAMS:
            assert(dynParams != NULL);
            g711Enc->rate = dynParams->bitRate;

            retVal = IALG_EOK;
            break;

        case XDM_RESET:
        case XDM_SETDEFAULT:
        case XDM_FLUSH:
            retVal = IALG_EOK;
            break;

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

            break;
    }

    return (retVal);
}
/*
 *  @(#) ti.xdais.dm.examples.g711; 1,0,0,20; 10-18-2006 19:11:57; /db/wtree/library/trees/dais-g07x/src/
 */