specrec.c

WINCE mp4 format source

                    //printf("0x%.8X\n", spec_data[gindex+(win*win_inc)+j+bin+2]);
                    //printf("0x%.8X\n", spec_data[gindex+(win*win_inc)+j+bin+3]);
#endif
#endif

                    gincrease += 4;
                    k += 4;
                }
                wa += win_inc;
            }
            j += width;
        }
        gindex += gincrease;
    }

    return error;
}

static uint8_t allocate_single_channel(NeAACDecHandle hDecoder, uint8_t channel,
                                       uint8_t output_channels)
{
    int mul = 1;

#ifdef MAIN_DEC
    /* MAIN object type prediction */
    if (hDecoder->object_type == MAIN)
    {
        /* allocate the state only when needed */
        if (hDecoder->pred_stat[channel] != NULL)
        {
            faad_free(hDecoder->pred_stat[channel]);
            hDecoder->pred_stat[channel] = NULL;
        }

        hDecoder->pred_stat[channel] = (pred_state*)faad_malloc(hDecoder->frameLength * sizeof(pred_state));
        reset_all_predictors(hDecoder->pred_stat[channel], hDecoder->frameLength);
    }
#endif

#ifdef LTP_DEC
    if (is_ltp_ot(hDecoder->object_type))
    {
        /* allocate the state only when needed */
        if (hDecoder->lt_pred_stat[channel] != NULL)
        {
            faad_free(hDecoder->lt_pred_stat[channel]);
            hDecoder->lt_pred_stat[channel] = NULL;
        }

        hDecoder->lt_pred_stat[channel] = (int16_t*)faad_malloc(hDecoder->frameLength*4 * sizeof(int16_t));
        memset(hDecoder->lt_pred_stat[channel], 0, hDecoder->frameLength*4 * sizeof(int16_t));
    }
#endif

    if (hDecoder->time_out[channel] != NULL)
    {
        faad_free(hDecoder->time_out[channel]);
        hDecoder->time_out[channel] = NULL;
    }

    {
        mul = 1;
#ifdef SBR_DEC
        hDecoder->sbr_alloced[hDecoder->fr_ch_ele] = 0;
        if ((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1))
        {
            /* SBR requires 2 times as much output data */
            mul = 2;
            hDecoder->sbr_alloced[hDecoder->fr_ch_ele] = 1;
        }
#endif
        hDecoder->time_out[channel] = (real_t*)faad_malloc(mul*hDecoder->frameLength*sizeof(real_t));
        memset(hDecoder->time_out[channel], 0, mul*hDecoder->frameLength*sizeof(real_t));
    }

#if (defined(PS_DEC) || defined(DRM_PS))
    if (output_channels == 2)
    {
        if (hDecoder->time_out[channel+1] != NULL)
        {
            faad_free(hDecoder->time_out[channel+1]);
            hDecoder->time_out[channel+1] = NULL;
        }

        hDecoder->time_out[channel+1] = (real_t*)faad_malloc(mul*hDecoder->frameLength*sizeof(real_t));
        memset(hDecoder->time_out[channel+1], 0, mul*hDecoder->frameLength*sizeof(real_t));
    }
#endif

    if (hDecoder->fb_intermed[channel] != NULL)
    {
        faad_free(hDecoder->fb_intermed[channel]);
        hDecoder->fb_intermed[channel] = NULL;
    }

    hDecoder->fb_intermed[channel] = (real_t*)faad_malloc(hDecoder->frameLength*sizeof(real_t));
    memset(hDecoder->fb_intermed[channel], 0, hDecoder->frameLength*sizeof(real_t));

#ifdef SSR_DEC
    if (hDecoder->object_type == SSR)
    {
        if (hDecoder->ssr_overlap[channel] == NULL)
        {
            hDecoder->ssr_overlap[channel] = (real_t*)faad_malloc(2*hDecoder->frameLength*sizeof(real_t));
            memset(hDecoder->ssr_overlap[channel], 0, 2*hDecoder->frameLength*sizeof(real_t));
        }
        if (hDecoder->prev_fmd[channel] == NULL)
        {
            uint16_t k;
            hDecoder->prev_fmd[channel] = (real_t*)faad_malloc(2*hDecoder->frameLength*sizeof(real_t));
            for (k = 0; k < 2*hDecoder->frameLength; k++)
                hDecoder->prev_fmd[channel][k] = REAL_CONST(-1);
        }
    }
#endif

    return 0;
}

static uint8_t allocate_channel_pair(NeAACDecHandle hDecoder,
                                     uint8_t channel, uint8_t paired_channel)
{
    int mul = 1;

#ifdef MAIN_DEC
    /* MAIN object type prediction */
    if (hDecoder->object_type == MAIN)
    {
        /* allocate the state only when needed */
        if (hDecoder->pred_stat[channel] == NULL)
        {
            hDecoder->pred_stat[channel] = (pred_state*)faad_malloc(hDecoder->frameLength * sizeof(pred_state));
            reset_all_predictors(hDecoder->pred_stat[channel], hDecoder->frameLength);
        }
        if (hDecoder->pred_stat[paired_channel] == NULL)
        {
            hDecoder->pred_stat[paired_channel] = (pred_state*)faad_malloc(hDecoder->frameLength * sizeof(pred_state));
            reset_all_predictors(hDecoder->pred_stat[paired_channel], hDecoder->frameLength);
        }
    }
#endif

#ifdef LTP_DEC
    if (is_ltp_ot(hDecoder->object_type))
    {
        /* allocate the state only when needed */
        if (hDecoder->lt_pred_stat[channel] == NULL)
        {
            hDecoder->lt_pred_stat[channel] = (int16_t*)faad_malloc(hDecoder->frameLength*4 * sizeof(int16_t));
            memset(hDecoder->lt_pred_stat[channel], 0, hDecoder->frameLength*4 * sizeof(int16_t));
        }
        if (hDecoder->lt_pred_stat[paired_channel] == NULL)
        {
            hDecoder->lt_pred_stat[paired_channel] = (int16_t*)faad_malloc(hDecoder->frameLength*4 * sizeof(int16_t));
            memset(hDecoder->lt_pred_stat[paired_channel], 0, hDecoder->frameLength*4 * sizeof(int16_t));
        }
    }
#endif

    if (hDecoder->time_out[channel] == NULL)
    {
        mul = 1;
#ifdef SBR_DEC
        hDecoder->sbr_alloced[hDecoder->fr_ch_ele] = 0;
        if ((hDecoder->sbr_present_flag == 1) || (hDecoder->forceUpSampling == 1))
        {
            /* SBR requires 2 times as much output data */
            mul = 2;
            hDecoder->sbr_alloced[hDecoder->fr_ch_ele] = 1;
        }
#endif
        hDecoder->time_out[channel] = (real_t*)faad_malloc(mul*hDecoder->frameLength*sizeof(real_t));
        memset(hDecoder->time_out[channel], 0, mul*hDecoder->frameLength*sizeof(real_t));
    }
    if (hDecoder->time_out[paired_channel] == NULL)
    {
        hDecoder->time_out[paired_channel] = (real_t*)faad_malloc(mul*hDecoder->frameLength*sizeof(real_t));
        memset(hDecoder->time_out[paired_channel], 0, mul*hDecoder->frameLength*sizeof(real_t));
    }

    if (hDecoder->fb_intermed[channel] == NULL)
    {
        hDecoder->fb_intermed[channel] = (real_t*)faad_malloc(hDecoder->frameLength*sizeof(real_t));
        memset(hDecoder->fb_intermed[channel], 0, hDecoder->frameLength*sizeof(real_t));
    }
    if (hDecoder->fb_intermed[paired_channel] == NULL)
    {
        hDecoder->fb_intermed[paired_channel] = (real_t*)faad_malloc(hDecoder->frameLength*sizeof(real_t));
        memset(hDecoder->fb_intermed[paired_channel], 0, hDecoder->frameLength*sizeof(real_t));
    }

#ifdef SSR_DEC
    if (hDecoder->object_type == SSR)
    {
        if (hDecoder->ssr_overlap[cpe->channel] == NULL)
        {
            hDecoder->ssr_overlap[cpe->channel] = (real_t*)faad_malloc(2*hDecoder->frameLength*sizeof(real_t));
            memset(hDecoder->ssr_overlap[cpe->channel], 0, 2*hDecoder->frameLength*sizeof(real_t));
        }
        if (hDecoder->ssr_overlap[cpe->paired_channel] == NULL)
        {
            hDecoder->ssr_overlap[cpe->paired_channel] = (real_t*)faad_malloc(2*hDecoder->frameLength*sizeof(real_t));
            memset(hDecoder->ssr_overlap[cpe->paired_channel], 0, 2*hDecoder->frameLength*sizeof(real_t));
        }
        if (hDecoder->prev_fmd[cpe->channel] == NULL)
        {
            uint16_t k;
            hDecoder->prev_fmd[cpe->channel] = (real_t*)faad_malloc(2*hDecoder->frameLength*sizeof(real_t));
            for (k = 0; k < 2*hDecoder->frameLength; k++)
                hDecoder->prev_fmd[cpe->channel][k] = REAL_CONST(-1);
        }
        if (hDecoder->prev_fmd[cpe->paired_channel] == NULL)
        {
            uint16_t k;
            hDecoder->prev_fmd[cpe->paired_channel] = (real_t*)faad_malloc(2*hDecoder->frameLength*sizeof(real_t));
            for (k = 0; k < 2*hDecoder->frameLength; k++)
                hDecoder->prev_fmd[cpe->paired_channel][k] = REAL_CONST(-1);
        }
    }
#endif

    return 0;
}

uint8_t reconstruct_single_channel(NeAACDecHandle hDecoder, ic_stream *ics,
                                   element *sce, int16_t *spec_data)
{
    uint8_t retval;
    int output_channels;
    ALIGN real_t spec_coef[1024];

#ifdef PROFILE
    int64_t count = faad_get_ts();
#endif


    /* always allocate 2 channels, PS can always "suddenly" turn up */
#if ( (defined(DRM) && defined(DRM_PS)) )
    output_channels = 2;
#elif defined(PS_DEC)
    if (hDecoder->ps_used[hDecoder->fr_ch_ele])
        output_channels = 2;
    else
        output_channels = 1;
#else
    output_channels = 1;
#endif

    if (hDecoder->element_output_channels[hDecoder->fr_ch_ele] == 0)
    {
        /* element_output_channels not set yet */
        hDecoder->element_output_channels[hDecoder->fr_ch_ele] = output_channels;
    } else if (hDecoder->element_output_channels[hDecoder->fr_ch_ele] != output_channels) {
        /* element inconsistency */

        /* this only happens if PS is actually found but not in the first frame
         * this means that there is only 1 bitstream element!
         */

        /* reset the allocation */
        hDecoder->element_alloced[hDecoder->fr_ch_ele] = 0;

        hDecoder->element_output_channels[hDecoder->fr_ch_ele] = output_channels;

        //return 21;
    }

    if (hDecoder->element_alloced[hDecoder->fr_ch_ele] == 0)
    {
        retval = allocate_single_channel(hDecoder, sce->channel, output_channels);
        if (retval > 0)
            return retval;

        hDecoder->element_alloced[hDecoder->fr_ch_ele] = 1;
    }


    /* dequantisation and scaling */
    retval = quant_to_spec(hDecoder, ics, spec_data, spec_coef, hDecoder->frameLength);
    if (retval > 0)
        return retval;

#ifdef PROFILE
    count = faad_get_ts() - count;
    hDecoder->requant_cycles += count;
#endif


    /* pns decoding */
    pns_decode(ics, NULL, spec_coef, NULL, hDecoder->frameLength, 0, hDecoder->object_type,
        &(hDecoder->__r1), &(hDecoder->__r2));

#ifdef MAIN_DEC
    /* MAIN object type prediction */
    if (hDecoder->object_type == MAIN)
    {
        /* intra channel prediction */
        ic_prediction(ics, spec_coef, hDecoder->pred_stat[sce->channel], hDecoder->frameLength,
            hDecoder->sf_index);

        /* In addition, for scalefactor bands coded by perceptual
           noise substitution the predictors belonging to the
           corresponding spectral coefficients are reset.
        */
        pns_reset_pred_state(ics, hDecoder->pred_stat[sce->channel]);
    }
#endif

#ifdef LTP_DEC
    if (is_ltp_ot(hDecoder->object_type))
    {
#ifdef LD_DEC
        if (hDecoder->object_type == LD)
        {
            if (ics->ltp.data_present)
            {
                if (ics->ltp.lag_update)
                    hDecoder->ltp_lag[sce->channel] = ics->ltp.lag;
            }
            ics->ltp.lag = hDecoder->ltp_lag[sce->channel];
        }
#endif

        /* long term prediction */
        lt_prediction(ics, &(ics->ltp), spec_coef, hDecoder->lt_pred_stat[sce->channel], hDecoder->fb,
            ics->window_shape, hDecoder->window_shape_prev[sce->channel],
            hDecoder->sf_index, hDecoder->object_type, hDecoder->frameLength);
    }
#endif

    /* tns decoding */
    tns_decode_frame(ics, &(ics->tns), hDecoder->sf_index, hDecoder->object_type,
        spec_coef, hDecoder->frameLength);