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static void fill_coding_method_array ( sb_int8_array  tone_level_idx,
sb_int8_array  tone_level_idx_temp,
sb_int8_array  coding_method,
int  nb_channels,
int  c,
int  superblocktype_2_3,
int  cm_table_select 
) [static]

Related to synthesis filter Called by process_subpacket_11 c is built with data from subpacket 11 Most of this function is used only if superblock_type_2_3 == 0, never seen it in samples

Parameters:
tone_level_idx 
tone_level_idx_temp 
coding_method q->coding_method[0][0][0]
nb_channels number of channels
c coming from subpacket 11, passed as 8*c
superblocktype_2_3 flag based on superblock packet type
cm_table_select q->cm_table_select

Definition at line 668 of file qdm2.c.

References fix_coding_method_array().

Referenced by process_subpacket_11().

{
    int ch, sb, j;
    int tmp, acc, esp_40, comp;
    int add1, add2, add3, add4;
    int64_t multres;

    // This should never happen
    if (nb_channels <= 0)
        return;

    if (!superblocktype_2_3) {
        /* This case is untested, no samples available */
        SAMPLES_NEEDED
        for (ch = 0; ch < nb_channels; ch++)
            for (sb = 0; sb < 30; sb++) {
                for (j = 1; j < 64; j++) {
                    add1 = tone_level_idx[ch][sb][j] - 10;
                    if (add1 < 0)
                        add1 = 0;
                    add2 = add3 = add4 = 0;
                    if (sb > 1) {
                        add2 = tone_level_idx[ch][sb - 2][j] + tone_level_idx_offset_table[sb][0] - 6;
                        if (add2 < 0)
                            add2 = 0;
                    }
                    if (sb > 0) {
                        add3 = tone_level_idx[ch][sb - 1][j] + tone_level_idx_offset_table[sb][1] - 6;
                        if (add3 < 0)
                            add3 = 0;
                    }
                    if (sb < 29) {
                        add4 = tone_level_idx[ch][sb + 1][j] + tone_level_idx_offset_table[sb][3] - 6;
                        if (add4 < 0)
                            add4 = 0;
                    }
                    tmp = tone_level_idx[ch][sb][j + 1] * 2 - add4 - add3 - add2 - add1;
                    if (tmp < 0)
                        tmp = 0;
                    tone_level_idx_temp[ch][sb][j + 1] = tmp & 0xff;
                }
                tone_level_idx_temp[ch][sb][0] = tone_level_idx_temp[ch][sb][1];
            }
            acc = 0;
            for (ch = 0; ch < nb_channels; ch++)
                for (sb = 0; sb < 30; sb++)
                    for (j = 0; j < 64; j++)
                        acc += tone_level_idx_temp[ch][sb][j];
            if (acc)
                tmp = c * 256 / (acc & 0xffff);
            multres = 0x66666667 * (acc * 10);
            esp_40 = (multres >> 32) / 8 + ((multres & 0xffffffff) >> 31);
            for (ch = 0;  ch < nb_channels; ch++)
                for (sb = 0; sb < 30; sb++)
                    for (j = 0; j < 64; j++) {
                        comp = tone_level_idx_temp[ch][sb][j]* esp_40 * 10;
                        if (comp < 0)
                            comp += 0xff;
                        comp /= 256; // signed shift
                        switch(sb) {
                            case 0:
                                if (comp < 30)
                                    comp = 30;
                                comp += 15;
                                break;
                            case 1:
                                if (comp < 24)
                                    comp = 24;
                                comp += 10;
                                break;
                            case 2:
                            case 3:
                            case 4:
                                if (comp < 16)
                                    comp = 16;
                        }
                        if (comp <= 5)
                            tmp = 0;
                        else if (comp <= 10)
                            tmp = 10;
                        else if (comp <= 16)
                            tmp = 16;
                        else if (comp <= 24)
                            tmp = -1;
                        else
                            tmp = 0;
                        coding_method[ch][sb][j] = ((tmp & 0xfffa) + 30 )& 0xff;
                    }
            for (sb = 0; sb < 30; sb++)
                fix_coding_method_array(sb, nb_channels, coding_method);
            for (ch = 0; ch < nb_channels; ch++)
                for (sb = 0; sb < 30; sb++)
                    for (j = 0; j < 64; j++)
                        if (sb >= 10) {
                            if (coding_method[ch][sb][j] < 10)
                                coding_method[ch][sb][j] = 10;
                        } else {
                            if (sb >= 2) {
                                if (coding_method[ch][sb][j] < 16)
                                    coding_method[ch][sb][j] = 16;
                            } else {
                                if (coding_method[ch][sb][j] < 30)
                                    coding_method[ch][sb][j] = 30;
                            }
                        }
    } else { // superblocktype_2_3 != 0
        for (ch = 0; ch < nb_channels; ch++)
            for (sb = 0; sb < 30; sb++)
                for (j = 0; j < 64; j++)
                    coding_method[ch][sb][j] = coding_method_table[cm_table_select][sb];
    }

    return;
}


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