void DRM_aac_scalable_main_element(NeAACDecStruct *hDecoder, NeAACDecFrameInfo *hInfo,
                                   bitfile *ld, program_config *pce, drc_info *drc)
{
    uint8_t retval = 0;
    uint8_t channels = hDecoder->fr_channels = 0;
    uint8_t ch;
    uint8_t this_layer_stereo = (hDecoder->channelConfiguration > 1) ? 1 : 0;
    element cpe = {0};
    ic_stream *ics1 = &(cpe.ics1);
    ic_stream *ics2 = &(cpe.ics2);
    int16_t *spec_data;
    ALIGN int16_t spec_data1[1024] = {0};
    ALIGN int16_t spec_data2[1024] = {0};

    hDecoder->fr_ch_ele = 0;

    hInfo->error = DRM_aac_scalable_main_header(hDecoder, ics1, ics2, ld, this_layer_stereo);
    if (hInfo->error > 0)
        return;

    cpe.common_window = 1;
    if (this_layer_stereo)
    {
        hDecoder->element_id[0] = ID_CPE;
        if (hDecoder->element_output_channels[hDecoder->fr_ch_ele] == 0)
            hDecoder->element_output_channels[hDecoder->fr_ch_ele] = 2;
    } else {
        hDecoder->element_id[0] = ID_SCE;
    }

    if (this_layer_stereo)
    {
        cpe.channel        = 0;
        cpe.paired_channel = 1;
    }


    /* Stereo2 / Mono1 */
    ics1->tns_data_present = faad_get1bit(ld);

#if defined(LTP_DEC)
    ics1->ltp.data_present = faad_get1bit(ld);
#elif defined (DRM)
    if(faad_get1bit(ld)) {
         hInfo->error = 26;
         return;
    }
#else
    faad_get1bit(ld);
#endif    

    hInfo->error = side_info(hDecoder, &cpe, ld, ics1, 1);
    if (hInfo->error > 0)
        return;
    if (this_layer_stereo)
    {
        /* Stereo3 */
        ics2->tns_data_present = faad_get1bit(ld);
#ifdef LTP_DEC
        ics1->ltp.data_present =
#endif
            faad_get1bit(ld);
        hInfo->error = side_info(hDecoder, &cpe, ld, ics2, 1);
        if (hInfo->error > 0)
            return;
    }
    /* Stereo4 / Mono2 */
    if (ics1->tns_data_present)
        tns_data(ics1, &(ics1->tns), ld);
    if (this_layer_stereo)
    {
        /* Stereo5 */
        if (ics2->tns_data_present)
            tns_data(ics2, &(ics2->tns), ld);
    }

#ifdef DRM
    /* CRC check */
    if (hDecoder->object_type == DRM_ER_LC)
    {
        if ((hInfo->error = (uint8_t)faad_check_CRC(ld, (uint16_t)faad_get_processed_bits(ld) - 8)) > 0)
            return;
    }
#endif

    /* Stereo6 / Mono3 */
    /* error resilient spectral data decoding */
    if ((hInfo->error = reordered_spectral_data(hDecoder, ics1, ld, spec_data1)) > 0)
    {
        return;
    }
    if (this_layer_stereo)
    {
        /* Stereo7 */
        /* error resilient spectral data decoding */
        if ((hInfo->error = reordered_spectral_data(hDecoder, ics2, ld, spec_data2)) > 0)
        {
            return;
        }
    }


#ifdef DRM
#ifdef SBR_DEC
    /* In case of DRM we need to read the SBR info before channel reconstruction */
    if ((hDecoder->sbr_present_flag == 1) && (hDecoder->object_type == DRM_ER_LC))
    {
        bitfile ld_sbr = {0};
        uint32_t i;
        uint16_t count = 0;
        uint8_t *revbuffer;
        uint8_t *prevbufstart;
        uint8_t *pbufend;

        /* all forward bitreading should be finished at this point */
        uint32_t bitsconsumed = faad_get_processed_bits(ld);
        uint32_t buffer_size = faad_origbitbuffer_size(ld);
        uint8_t *buffer = (uint8_t*)faad_origbitbuffer(ld);

        if (bitsconsumed + 8 > buffer_size*8)
        {
            hInfo->error = 14;
            return;
        }

        if (!hDecoder->sbr[0])
        {
            hDecoder->sbr[0] = sbrDecodeInit(hDecoder->frameLength, hDecoder->element_id[0],
                2*get_sample_rate(hDecoder->sf_index), 0 /* ds SBR */, 1);
        }

        /* Reverse bit reading of SBR data in DRM audio frame */
        revbuffer = (uint8_t*)faad_malloc(buffer_size*sizeof(uint8_t));
        prevbufstart = revbuffer;
        pbufend = &buffer[buffer_size - 1];
        for (i = 0; i < buffer_size; i++)
            *prevbufstart++ = tabFlipbits[*pbufend--];

        /* Set SBR data */
        /* consider 8 bits from AAC-CRC */
        /* SBR buffer size is original buffer size minus AAC buffer size */
        count = (uint16_t)bit2byte(buffer_size*8 - bitsconsumed);
        faad_initbits(&ld_sbr, revbuffer, count);

        hDecoder->sbr[0]->sample_rate = get_sample_rate(hDecoder->sf_index);
        hDecoder->sbr[0]->sample_rate *= 2;

        faad_getbits(&ld_sbr, 8); /* Skip 8-bit CRC */

        hDecoder->sbr[0]->ret = sbr_extension_data(&ld_sbr, hDecoder->sbr[0], count, hDecoder->postSeekResetFlag);
#if (defined(PS_DEC) || defined(DRM_PS))
        if (hDecoder->sbr[0]->ps_used)
        {
            hDecoder->ps_used[0] = 1;
            hDecoder->ps_used_global = 1;
        }
#endif

        if (ld_sbr.error)
        {
            hDecoder->sbr[0]->ret = 1;
        }

        /* check CRC */
        /* no need to check it if there was already an error */
        if (hDecoder->sbr[0]->ret == 0)
            hDecoder->sbr[0]->ret = (uint8_t)faad_check_CRC(&ld_sbr, (uint16_t)faad_get_processed_bits(&ld_sbr) - 8);

        /* SBR data was corrupted, disable it until the next header */
        if (hDecoder->sbr[0]->ret != 0)
        {
            hDecoder->sbr[0]->header_count = 0;
        }

        faad_endbits(&ld_sbr);

        if (revbuffer)
            faad_free(revbuffer);
    }
#endif
#endif

    if (this_layer_stereo)
    {
        hInfo->error = reconstruct_channel_pair(hDecoder, ics1, ics2, &cpe, spec_data1, spec_data2);
        if (hInfo->error > 0)
            return;
    } else {
        hInfo->error = reconstruct_single_channel(hDecoder, ics1, &cpe, spec_data1);
        if (hInfo->error > 0)
            return;
    }

    /* map output channels position to internal data channels */
    if (hDecoder->element_output_channels[hDecoder->fr_ch_ele] == 2)
    {
        /* this might be faulty when pce_set is true */
        hDecoder->internal_channel[channels] = channels;
        hDecoder->internal_channel[channels+1] = channels+1;
    } else {
        hDecoder->internal_channel[channels] = channels;
    }

    hDecoder->fr_channels += hDecoder->element_output_channels[hDecoder->fr_ch_ele];
    hDecoder->fr_ch_ele++;

    return;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.