static int decode_ics(AACContext *ac, SingleChannelElement *sce,
                      GetBitContext *gb, int common_window, int scale_flag)
{
    Pulse pulse;
    TemporalNoiseShaping    *tns = &sce->tns;
    IndividualChannelStream *ics = &sce->ics;
    float *out = sce->coeffs;
    int global_gain, eld_syntax, er_syntax, pulse_present = 0;
    int ret;

    eld_syntax = ac->oc[1].m4ac.object_type == AOT_ER_AAC_ELD;
    er_syntax  = ac->oc[1].m4ac.object_type == AOT_ER_AAC_LC ||
                 ac->oc[1].m4ac.object_type == AOT_ER_AAC_LTP ||
                 ac->oc[1].m4ac.object_type == AOT_ER_AAC_LD ||
                 ac->oc[1].m4ac.object_type == AOT_ER_AAC_ELD;

    /* This assignment is to silence a GCC warning about the variable being used
     * uninitialized when in fact it always is.
     */
    pulse.num_pulse = 0;

    global_gain = get_bits(gb, 8);

    if (!common_window && !scale_flag) {
        if (decode_ics_info(ac, ics, gb) < 0)
            return AVERROR_INVALIDDATA;
    }

    if ((ret = decode_band_types(ac, sce->band_type,
                                 sce->band_type_run_end, gb, ics)) < 0)
        return ret;
    if ((ret = decode_scalefactors(ac, sce->sf, gb, global_gain, ics,
                                  sce->band_type, sce->band_type_run_end)) < 0)
        return ret;

    pulse_present = 0;
    if (!scale_flag) {
        if (!eld_syntax && (pulse_present = get_bits1(gb))) {
            if (ics->window_sequence[0] == EIGHT_SHORT_SEQUENCE) {
                av_log(ac->avctx, AV_LOG_ERROR,
                       "Pulse tool not allowed in eight short sequence.\n");
                return AVERROR_INVALIDDATA;
            }
            if (decode_pulses(&pulse, gb, ics->swb_offset, ics->num_swb)) {
                av_log(ac->avctx, AV_LOG_ERROR,
                       "Pulse data corrupt or invalid.\n");
                return AVERROR_INVALIDDATA;
            }
        }
        tns->present = get_bits1(gb);
        if (tns->present && !er_syntax)
            if (decode_tns(ac, tns, gb, ics) < 0)
                return AVERROR_INVALIDDATA;
        if (!eld_syntax && get_bits1(gb)) {
            avpriv_request_sample(ac->avctx, "SSR");
            return AVERROR_PATCHWELCOME;
        }
        // I see no textual basis in the spec for this occuring after SSR gain
        // control, but this is what both reference and real implmentations do
        if (tns->present && er_syntax)
            if (decode_tns(ac, tns, gb, ics) < 0)
                return AVERROR_INVALIDDATA;
    }

    if (decode_spectrum_and_dequant(ac, out, gb, sce->sf, pulse_present,
                                    &pulse, ics, sce->band_type) < 0)
        return AVERROR_INVALIDDATA;

    if (ac->oc[1].m4ac.object_type == AOT_AAC_MAIN && !common_window)
        apply_prediction(ac, sce);

    return 0;
}
Unknown