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) { int ch, sb, j; int tmp, acc, esp_40, comp; int add1, add2, add3, add4; int64_t multres; 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 < 63; j++) { // The loop only iterates to 63 so the code doesn't overflow the buffer 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]; 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]; } }