/****************************************************************************** * * * Copyright (C) 2018 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * ***************************************************************************** * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore */ #include #include #include "ixheaacd_sbr_common.h" #include "ixheaacd_type_def.h" #include "ixheaacd_constants.h" #include "ixheaacd_basic_ops32.h" #include "ixheaacd_basic_ops16.h" #include "ixheaacd_basic_ops40.h" #include "ixheaacd_basic_ops.h" #include "ixheaacd_defines.h" #include "ixheaacd_intrinsics.h" #include "ixheaacd_sbr_const.h" #include "ixheaacd_basic_op.h" #include "ixheaacd_defines.h" #include "ixheaacd_bitbuffer.h" #include "ixheaacd_pns.h" #include "ixheaacd_aac_rom.h" #include "ixheaacd_pulsedata.h" #include "ixheaacd_drc_data_struct.h" #include "ixheaacd_lt_predict.h" #include "ixheaacd_channelinfo.h" #include "ixheaacd_drc_dec.h" #include "ixheaacd_sbrdecoder.h" #include "ixheaacd_sbrdecsettings.h" #include "ixheaacd_sbr_scale.h" #include "ixheaacd_lpp_tran.h" #include "ixheaacd_env_extr_part.h" #include "ixheaacd_sbr_rom.h" #include "ixheaacd_hybrid.h" #include "ixheaacd_ps_dec.h" #include "ixheaacd_ps_bitdec.h" #include "ixheaacd_env_extr.h" #include "ixheaacd_common_rom.h" #include "ixheaacd_freq_sca.h" #include "ixheaacd_qmf_dec.h" #include "ixheaacd_env_calc.h" #include "ixheaacd_pvc_dec.h" #include "ixheaacd_sbr_dec.h" #include "ixheaacd_env_dec.h" #include "ixheaacd_basic_funcs.h" #include "ixheaacd_sbr_crc.h" #include "ixheaacd_function_selector.h" #include "ixheaacd_audioobjtypes.h" #define ALIGN_SIZE64(x) ((((x) + 7) >> 3) << 3) static const FLOAT32 ixheaacd_new_bw_table[4][4] = { {0.00f, 0.60f, 0.90f, 0.98f}, {0.60f, 0.75f, 0.90f, 0.98f}, {0.00f, 0.75f, 0.90f, 0.98f}, {0.00f, 0.75f, 0.90f, 0.98f}}; static const WORD32 ixheaacd_inew_bw_table[4][4] = { {0x00000000, 0x4ccccccd, 0x73333333, 0x7d70a3d7}, {0x4ccccccd, 0x60000000, 0x73333333, 0x7d70a3d7}, {0x00000000, 0x60000000, 0x73333333, 0x7d70a3d7}, {0x00000000, 0x60000000, 0x73333333, 0x7d70a3d7}}; VOID ixheaacd_reset_sbrenvelope_calc(ia_sbr_calc_env_struct *h_cal_env) { h_cal_env->ph_index = 0; h_cal_env->filt_buf_noise_e = 0; h_cal_env->start_up = 1; } WORD32 ixheaacd_derive_lim_band_tbl( ia_sbr_header_data_struct *ptr_header_data, const ia_patch_param_struct *p_str_patch_param, WORD16 num_patches, ixheaacd_misc_tables *pstr_common_tables) { WORD32 i, k, k_1; WORD32 nr_lim, patch_border_k, patch_border_k_1, temp_nr_lim; WORD16 lim_table[MAX_FREQ_COEFFS / 2 + MAX_NUM_PATCHES + 1]; WORD16 patch_borders[MAX_NUM_PATCHES + 1]; WORD16 kx, k2; WORD16 temp, lim_bands, num_octaves; WORD16 *f_lim_tbl = ptr_header_data->pstr_freq_band_data->freq_band_tbl_lim; WORD16 *num_lf_bands = &ptr_header_data->pstr_freq_band_data->num_lf_bands; WORD16 *f_low_tbl = ptr_header_data->pstr_freq_band_data->freq_band_table[LOW]; WORD16 num_low_bnd = ptr_header_data->pstr_freq_band_data->num_sf_bands[LOW]; WORD16 limiter_bands = ptr_header_data->limiter_bands; WORD16 sub_band_start = f_low_tbl[0]; WORD16 sub_band_end = f_low_tbl[num_low_bnd]; static const WORD16 limbnd_per_oct[4] = {(WORD16)0x2000, (WORD16)0x2666, (WORD16)0x4000, (WORD16)0x6000}; if (limiter_bands == 0) { f_lim_tbl[0] = 0; f_lim_tbl[1] = sub_band_end - sub_band_start; nr_lim = 1; } else { for (k = 0; k < num_patches; k++) { patch_borders[k] = p_str_patch_param[k].guard_start_band - sub_band_start; } patch_borders[k] = sub_band_end - sub_band_start; for (k = 0; k <= num_low_bnd; k++) { lim_table[k] = f_low_tbl[k] - sub_band_start; } for (k = 1; k < num_patches; k++) { lim_table[num_low_bnd + k] = patch_borders[k]; } temp_nr_lim = nr_lim = (num_low_bnd + num_patches) - 1; ixheaacd_aac_shellsort(lim_table, (temp_nr_lim + 1)); k = 1; k_1 = 0; lim_bands = limbnd_per_oct[limiter_bands]; while ((k - temp_nr_lim) <= 0) { k2 = lim_table[k] + sub_band_start; kx = lim_table[k_1] + sub_band_start; num_octaves = pstr_common_tables->log_dual_is_table[k2]; num_octaves -= pstr_common_tables->log_dual_is_table[kx]; temp = (WORD16)(((WORD32)lim_bands * (WORD32)num_octaves) >> 15); if (temp < 0x01f6) { if (lim_table[k_1] == lim_table[k]) { lim_table[k] = sub_band_end; nr_lim = nr_lim - 1; k = (k + 1); continue; } patch_border_k_1 = patch_border_k = 0; for (i = 0; i <= num_patches; i++) { if (lim_table[k] == patch_borders[i]) { patch_border_k = 1; } if (lim_table[k_1] == patch_borders[i]) { patch_border_k_1 = 1; } } if (!patch_border_k) { lim_table[k] = sub_band_end; nr_lim = nr_lim - 1; k = (k + 1); continue; } if (!patch_border_k_1) { lim_table[k_1] = sub_band_end; nr_lim = nr_lim - 1; } } k_1 = k; k = (k + 1); } ixheaacd_aac_shellsort(lim_table, (temp_nr_lim + 1)); memcpy(f_lim_tbl, lim_table, sizeof(WORD16) * (nr_lim + 1)); } *num_lf_bands = nr_lim; return 0; } VOID ixheaacd_lean_sbrconcealment( ia_sbr_header_data_struct *ptr_header_data, ia_sbr_frame_info_data_struct *ptr_sbr_data, ia_sbr_prev_frame_data_struct *ptr_prev_data) { WORD32 target; WORD32 step; WORD32 i; WORD16 cur_start_pos; WORD16 cur_stop_pos; ptr_sbr_data->amp_res = ptr_prev_data->amp_res; ptr_sbr_data->coupling_mode = ptr_prev_data->coupling_mode; ptr_sbr_data->max_qmf_subband_aac = ptr_prev_data->max_qmf_subband_aac; memcpy(ptr_sbr_data->sbr_invf_mode, ptr_prev_data->sbr_invf_mode, sizeof(WORD32) * MAX_INVF_BANDS); ptr_sbr_data->str_frame_info_details.num_env = 1; cur_start_pos = ptr_prev_data->end_position - ptr_header_data->num_time_slots; cur_stop_pos = ptr_header_data->num_time_slots; ptr_sbr_data->str_frame_info_details.border_vec[0] = cur_start_pos; ptr_sbr_data->str_frame_info_details.border_vec[1] = cur_stop_pos; ptr_sbr_data->str_frame_info_details.noise_border_vec[0] = cur_start_pos; ptr_sbr_data->str_frame_info_details.noise_border_vec[1] = cur_stop_pos; ; ptr_sbr_data->str_frame_info_details.freq_res[0] = 1; ptr_sbr_data->str_frame_info_details.transient_env = -1; ptr_sbr_data->str_frame_info_details.num_noise_env = 1; ptr_sbr_data->num_env_sfac = ptr_header_data->pstr_freq_band_data->num_sf_bands[1]; ptr_sbr_data->del_cod_dir_arr[0] = DTDF_DIR_TIME; if (ptr_sbr_data->coupling_mode == COUPLING_BAL) { target = SBR_ENERGY_PAN_OFFSET; } else { target = 0; } step = 1; if (ptr_sbr_data->amp_res - SBR_AMPLITUDE_RESOLUTION_1_5 == 0) { target = (target << 1); step = (step << 1); } for (i = 0; i < ptr_sbr_data->num_env_sfac; i++) { if (ptr_prev_data->sfb_nrg_prev[i] > target) ptr_sbr_data->int_env_sf_arr[i] = -(step); else ptr_sbr_data->int_env_sf_arr[i] = step; } ptr_sbr_data->del_cod_dir_noise_arr[0] = DTDF_DIR_TIME; memset(ptr_sbr_data->int_noise_floor, 0, sizeof(WORD16) * ptr_header_data->pstr_freq_band_data->num_nf_bands); memset(ptr_sbr_data->add_harmonics, 0, sizeof(FLAG) * MAX_FREQ_COEFFS); } static WORD16 ixheaacd_find_closest_entry(WORD32 goal_sb, WORD16 *f_master_tbl, WORD16 num_mf_bands, WORD16 direction) { WORD32 index; if (goal_sb <= f_master_tbl[0]) return f_master_tbl[0]; if (goal_sb >= f_master_tbl[num_mf_bands]) return f_master_tbl[num_mf_bands]; if (direction) { index = 0; while (f_master_tbl[index] < goal_sb) { index++; } } else { index = num_mf_bands; while (f_master_tbl[index] > goal_sb) { index--; } } return f_master_tbl[index]; } WORD32 ixheaacd_reset_hf_generator(ia_sbr_hf_generator_struct *ptr_hf_gen_str, ia_sbr_header_data_struct *ptr_header_data, WORD audio_object_type) { WORD32 patch, sb; WORD32 temp; WORD16 *ptr_noise_freq_tbl; WORD32 num_nf_bands; ia_transposer_settings_struct *pstr_transposer_settings = ptr_hf_gen_str->pstr_settings; ia_patch_param_struct *p_str_patch_param = pstr_transposer_settings->str_patch_param; WORD32 sub_band_start = ptr_header_data->pstr_freq_band_data->sub_band_start; WORD16 *f_master_tbl = ptr_header_data->pstr_freq_band_data->f_master_tbl; WORD16 num_mf_bands = ptr_header_data->pstr_freq_band_data->num_mf_bands; WORD16 usb = ptr_header_data->pstr_freq_band_data->sub_band_end; WORD32 src_start_band; WORD32 patch_stride; WORD32 num_bands_in_patch; WORD32 lsb = f_master_tbl[0]; WORD16 xover_offset = sub_band_start - lsb; WORD16 goal_sb; WORD32 fs = ptr_header_data->out_sampling_freq; if (lsb < (SHIFT_START_SB + 4)) { return (1); } switch (fs) { case 16000: case 22050: case 24000: case 32000: goal_sb = 64; break; case 44100: goal_sb = 46; break; case 48000: goal_sb = 43; break; case 64000: goal_sb = 32; break; case 88200: goal_sb = 23; break; case 96000: goal_sb = 21; break; default: return (0); } goal_sb = ixheaacd_find_closest_entry(goal_sb, f_master_tbl, num_mf_bands, 1); if (audio_object_type != AOT_ER_AAC_ELD && audio_object_type != AOT_ER_AAC_LD) { if (ixheaacd_abs16_sat((WORD16)(goal_sb - usb)) < 4) { goal_sb = usb; } } src_start_band = SHIFT_START_SB + xover_offset; sb = (lsb + xover_offset); patch = 0; if ((goal_sb < sb) && (lsb > src_start_band)) { return -1; } while (((sb - usb) < 0) && (patch < MAX_NUM_PATCHES)) { ia_patch_param_struct *ptr_loc_patch_param = &p_str_patch_param[patch]; WORD16 abs_sb, flag_break = 0; ptr_loc_patch_param->guard_start_band = sb; sb = (sb + GUARDBANDS); ptr_loc_patch_param->dst_start_band = sb; num_bands_in_patch = (goal_sb - sb); if ((num_bands_in_patch <= 0) && ((num_bands_in_patch - (lsb - src_start_band)) < 0)) { flag_break = 1; } if ((num_bands_in_patch - (lsb - src_start_band)) >= 0) { patch_stride = sb - src_start_band; patch_stride = (WORD16)(patch_stride & ~1); num_bands_in_patch = (lsb - (sb - patch_stride)); num_bands_in_patch = ixheaacd_find_closest_entry( sb + num_bands_in_patch, f_master_tbl, num_mf_bands, 0); num_bands_in_patch -= sb; } patch_stride = ((num_bands_in_patch + sb) - lsb); patch_stride = (WORD16)((patch_stride + 1) & ~1); if (num_bands_in_patch > 0) { ptr_loc_patch_param->src_start_band = (sb - patch_stride); ptr_loc_patch_param->dst_end_band = patch_stride; ptr_loc_patch_param->num_bands_in_patch = num_bands_in_patch; ptr_loc_patch_param->src_end_band = (ptr_loc_patch_param->src_start_band + num_bands_in_patch); sb = (sb + ptr_loc_patch_param->num_bands_in_patch); patch++; } src_start_band = SHIFT_START_SB; abs_sb = ixheaacd_abs16_sat((WORD16)((sb - goal_sb))) - 3; if (abs_sb < 0) { goal_sb = usb; } else { if (flag_break == 1) break; } } patch--; if ((patch > 0) && (p_str_patch_param[patch].num_bands_in_patch < 3)) { patch--; sb = p_str_patch_param[patch].dst_start_band + p_str_patch_param[patch].num_bands_in_patch; } if (patch >= MAX_NUM_PATCHES) { return -1; } pstr_transposer_settings->num_patches = patch + 1; temp = 0; for (patch = 0; patch < pstr_transposer_settings->num_patches; patch++) { sb = ixheaacd_min32(sb, p_str_patch_param[patch].src_start_band); temp = ixheaacd_max32(temp, p_str_patch_param[patch].src_end_band); } if (sb > temp) return IA_FATAL_ERROR; pstr_transposer_settings->start_patch = sb; pstr_transposer_settings->stop_patch = temp; ptr_noise_freq_tbl = ptr_header_data->pstr_freq_band_data->freq_band_tbl_noise; num_nf_bands = ptr_header_data->pstr_freq_band_data->num_nf_bands; memcpy(&pstr_transposer_settings->bw_borders[0], &ptr_noise_freq_tbl[1], sizeof(WORD16) * num_nf_bands); memset(ptr_hf_gen_str->bw_array_prev, 0, sizeof(WORD32) * MAX_NUM_PATCHES); return 0; } VOID ixheaacd_rescale_x_overlap( ia_sbr_dec_struct *ptr_sbr_dec, ia_sbr_header_data_struct *ptr_header_data, ia_sbr_frame_info_data_struct *ptr_frame_data, ia_sbr_prev_frame_data_struct *ptr_frame_data_prev, WORD32 **pp_overlap_buffer_real, WORD32 **pp_overlap_buffer_imag, FLAG low_pow_flag) { WORD32 k, l; WORD32 start_band, end_band; WORD32 target_lsb, target_usb; WORD32 source_scale, target_scale, delta_scale, reserve; WORD32 old_lsb = ptr_frame_data_prev->max_qmf_subband_aac; WORD32 start_slot = (ptr_header_data->time_step * (ptr_frame_data_prev->end_position - ptr_header_data->num_time_slots)); WORD32 new_lsb = ptr_frame_data->max_qmf_subband_aac; ptr_sbr_dec->str_codec_qmf_bank.usb = new_lsb; ptr_sbr_dec->str_synthesis_qmf_bank.lsb = new_lsb; start_band = ixheaacd_min32(old_lsb, new_lsb); end_band = ixheaacd_max32(old_lsb, new_lsb); if (new_lsb != old_lsb && old_lsb > 0) { for (l = start_slot; l < 6; l++) { for (k = old_lsb; k < new_lsb; k++) { pp_overlap_buffer_real[l][k] = 0L; if (!low_pow_flag) { pp_overlap_buffer_imag[l][k] = 0L; } } } if (new_lsb > old_lsb) { source_scale = ptr_sbr_dec->str_sbr_scale_fact.ov_hb_scale; target_scale = ptr_sbr_dec->str_sbr_scale_fact.ov_lb_scale; target_lsb = 0; target_usb = old_lsb; } else { source_scale = ptr_sbr_dec->str_sbr_scale_fact.ov_lb_scale; target_scale = ptr_sbr_dec->str_sbr_scale_fact.ov_hb_scale; target_lsb = old_lsb; target_usb = ptr_sbr_dec->str_synthesis_qmf_bank.usb; } reserve = (*ixheaacd_ixheaacd_expsubbandsamples)( pp_overlap_buffer_real, pp_overlap_buffer_imag, start_band, end_band, 0, start_slot, low_pow_flag); (*ixheaacd_adjust_scale)(pp_overlap_buffer_real, pp_overlap_buffer_imag, start_band, end_band, 0, start_slot, reserve, low_pow_flag); source_scale += reserve; delta_scale = (target_scale - source_scale); if (delta_scale > 0) { delta_scale = -(delta_scale); start_band = target_lsb; end_band = target_usb; if (new_lsb > old_lsb) { ptr_sbr_dec->str_sbr_scale_fact.ov_lb_scale = source_scale; } else { ptr_sbr_dec->str_sbr_scale_fact.ov_hb_scale = source_scale; } } (*ixheaacd_adjust_scale)(pp_overlap_buffer_real, pp_overlap_buffer_imag, start_band, end_band, 0, start_slot, delta_scale, low_pow_flag); } } VOID ixheaacd_map_sineflags(WORD16 *freq_band_table, WORD16 num_sf_bands, FLAG *add_harmonics, WORD8 *harm_flags_prev, WORD16 transient_env, WORD8 *sine_mapped) { WORD32 qmfband2, li, ui, i; WORD32 low_subband_sec; WORD32 oldflags; low_subband_sec = (freq_band_table[0] << 1); memset(sine_mapped, MAX_ENVELOPES, sizeof(WORD8) * MAX_FREQ_COEFFS); for (i = (num_sf_bands - 1); i >= 0; i--) { oldflags = *harm_flags_prev; *harm_flags_prev++ = add_harmonics[i]; if (add_harmonics[i]) { li = freq_band_table[i]; ui = freq_band_table[i + 1]; qmfband2 = ((ui + li) - low_subband_sec) >> 1; if (oldflags) sine_mapped[qmfband2] = 0; else sine_mapped[qmfband2] = (WORD8)transient_env; } } } VOID ixheaacd_map_34_params_to_20(WORD16 *params) { params[0] = ixheaacd_divideby3(params[0] + params[0] + params[1]); params[1] = ixheaacd_divideby3(params[1] + params[2] + params[2]); params[2] = ixheaacd_divideby3(params[3] + params[3] + params[4]); params[3] = ixheaacd_divideby3(params[4] + params[5] + params[5]); params[4] = ixheaacd_divideby2(params[6] + params[7]); params[5] = ixheaacd_divideby2(params[8] + params[9]); params[6] = params[10]; params[7] = params[11]; params[8] = ixheaacd_divideby2(params[12] + params[13]); params[9] = ixheaacd_divideby2(params[14] + params[15]); params[10] = params[16]; params[11] = params[17]; params[12] = params[18]; params[13] = params[19]; params[14] = ixheaacd_divideby2(params[20] + params[21]); params[15] = ixheaacd_divideby2(params[22] + params[23]); params[16] = ixheaacd_divideby2(params[24] + params[25]); params[17] = ixheaacd_divideby2(params[26] + params[27]); params[18] = ixheaacd_divideby2( ixheaacd_divideby2(params[28] + params[29] + params[30] + params[31])); params[19] = ixheaacd_divideby2(params[32] + params[33]); } extern const WORD16 ixheaacd_num_bands[3]; WORD16 ixheaacd_read_ps_data(ia_ps_dec_struct *ptr_ps_dec, ia_bit_buf_struct *it_bit_buff, WORD16 num_bits_left, ia_ps_tables_struct *ps_tables_ptr) { WORD b, e, temp; const WORD16 num_env_tab[4] = {0, 1, 2, 4}; WORD cnt_bits; ia_huffman_data_type huffman_table, huffman_df_table, huffman_dt_table; FLAG enable_ps_header; if (!ptr_ps_dec) { return 0; } cnt_bits = it_bit_buff->cnt_bits; enable_ps_header = ixheaacd_read_bits_buf(it_bit_buff, 1); if (enable_ps_header) { ptr_ps_dec->enable_iid = ixheaacd_read_bits_buf(it_bit_buff, 1); if (ptr_ps_dec->enable_iid) { ptr_ps_dec->iid_mode = ixheaacd_read_bits_buf(it_bit_buff, 3); } if (ptr_ps_dec->iid_mode > 2) { ptr_ps_dec->iid_quant = 1; ptr_ps_dec->iid_mode -= 3; } else { ptr_ps_dec->iid_quant = 0; } ptr_ps_dec->enable_icc = ixheaacd_read_bits_buf(it_bit_buff, 1); if (ptr_ps_dec->enable_icc) { ptr_ps_dec->icc_mode = ixheaacd_read_bits_buf(it_bit_buff, 3); } ptr_ps_dec->enable_ext = ixheaacd_read_bits_buf(it_bit_buff, 1); if (ptr_ps_dec->icc_mode > 2) { ptr_ps_dec->icc_mode -= 3; } } if ((ptr_ps_dec->enable_iid && ptr_ps_dec->iid_mode > 2) || (ptr_ps_dec->enable_icc && ptr_ps_dec->icc_mode > 2)) { ptr_ps_dec->ps_data_present = 0; num_bits_left -= (cnt_bits - it_bit_buff->cnt_bits); while (num_bits_left > 8) { ixheaacd_read_bits_buf(it_bit_buff, 8); num_bits_left -= 8; } ixheaacd_read_bits_buf(it_bit_buff, num_bits_left); return (cnt_bits - it_bit_buff->cnt_bits); } ptr_ps_dec->frame_class = (FLAG)ixheaacd_read_bits_buf(it_bit_buff, 1); temp = ixheaacd_read_bits_buf(it_bit_buff, 2); if (ptr_ps_dec->frame_class == 0) { ptr_ps_dec->num_env = num_env_tab[temp]; } else { ptr_ps_dec->num_env = (((1 + temp) << 8) >> 8); for (e = 1; e < ptr_ps_dec->num_env + 1; e++) { ptr_ps_dec->border_position[e] = (((ixheaacd_read_bits_buf(it_bit_buff, 5) + 1) << 8) >> 8); } } if (ptr_ps_dec->enable_iid) { if (ptr_ps_dec->iid_quant) { huffman_df_table = (ia_huffman_data_type)&ps_tables_ptr->huff_iid_df_fine; huffman_dt_table = (ia_huffman_data_type)&ps_tables_ptr->huff_iid_dt_fine; } else { huffman_df_table = (ia_huffman_data_type)&ps_tables_ptr->huff_iid_df; huffman_dt_table = (ia_huffman_data_type)&ps_tables_ptr->huff_iid_dt; } for (e = 0; e < ptr_ps_dec->num_env; e++) { ptr_ps_dec->iid_dt[e] = (FLAG)ixheaacd_read_bits_buf(it_bit_buff, 1); if (ptr_ps_dec->iid_dt[e]) { huffman_table = huffman_dt_table; } else { huffman_table = huffman_df_table; } for (b = 0; b < ixheaacd_num_bands[ptr_ps_dec->iid_mode]; b++) { ptr_ps_dec->iid_par_table[e][b] = ixheaacd_ssc_huff_dec(huffman_table, it_bit_buff); } } } if (ptr_ps_dec->enable_icc) { huffman_df_table = (ia_huffman_data_type)&ps_tables_ptr->huff_icc_df; huffman_dt_table = (ia_huffman_data_type)&ps_tables_ptr->huff_icc_dt; for (e = 0; e < ptr_ps_dec->num_env; e++) { ptr_ps_dec->icc_dt[e] = ixheaacd_read_bits_buf(it_bit_buff, 1); if (ptr_ps_dec->icc_dt[e]) { huffman_table = huffman_dt_table; } else { huffman_table = huffman_df_table; } for (b = 0; b < ixheaacd_num_bands[ptr_ps_dec->icc_mode]; b++) { ptr_ps_dec->icc_par_table[e][b] = ixheaacd_ssc_huff_dec(huffman_table, it_bit_buff); } } } if (ptr_ps_dec->enable_ext) { WORD32 cnt = ixheaacd_read_bits_buf(it_bit_buff, 4); if (cnt == 15) { cnt += ixheaacd_read_bits_buf(it_bit_buff, 8); } while (cnt--) { ixheaacd_read_bits_buf(it_bit_buff, 8); } } ptr_ps_dec->ps_data_present = 1; return (cnt_bits - it_bit_buff->cnt_bits); } VOID ixheaacd_invfilt_level_emphasis(ia_sbr_hf_generator_struct *ptr_hf_gen_str, WORD32 num_if_bands, WORD32 *inv_filt_mode, WORD32 *inv_filt_mode_prev, WORD32 *bw_array) { WORD32 i; WORD32 accu; WORD16 w1, w2; for (i = 0; i < num_if_bands; i++) { bw_array[i] = ixheaacd_inew_bw_table[inv_filt_mode_prev[i]][inv_filt_mode[i]]; if (bw_array[i] < ptr_hf_gen_str->bw_array_prev[i]) { w1 = 0x6000; w2 = 0x2000; } else { w1 = 0x7400; w2 = 0x0c00; } accu = ixheaacd_add32( ixheaacd_mult32x16in32_shl(bw_array[i], w1), ixheaacd_mult32x16in32_shl(ptr_hf_gen_str->bw_array_prev[i], w2)); if (accu < 0x02000000) { accu = 0; } if (accu >= 0x7f800000) { accu = 0x7f800000; } bw_array[i] = accu; } } typedef struct { FLOAT32 phi_0_1_real; FLOAT32 phi_0_1_imag; FLOAT32 phi_0_2_real; FLOAT32 phi_0_2_imag; FLOAT32 phi_1_1; FLOAT32 phi_1_2_real; FLOAT32 phi_1_2_imag; FLOAT32 phi_2_2; FLOAT32 det; } ia_auto_corr_ele_struct; static VOID ixheaacd_esbr_calc_co_variance( ia_auto_corr_ele_struct *pstr_auto_corr, FLOAT32 vec_x_real[][64], FLOAT32 vec_x_imag[][64], WORD32 bd, WORD32 len) { WORD32 j, jminus1, jminus2; memset(pstr_auto_corr, 0, sizeof(ia_auto_corr_ele_struct)); for (j = 0; j < len; j++) { jminus1 = j - 1; jminus2 = jminus1 - 1; pstr_auto_corr->phi_0_1_real += vec_x_real[j][bd] * vec_x_real[jminus1][bd] + vec_x_imag[j][bd] * vec_x_imag[jminus1][bd]; pstr_auto_corr->phi_0_1_imag += vec_x_imag[j][bd] * vec_x_real[jminus1][bd] - vec_x_real[j][bd] * vec_x_imag[jminus1][bd]; pstr_auto_corr->phi_0_2_real += vec_x_real[j][bd] * vec_x_real[jminus2][bd] + vec_x_imag[j][bd] * vec_x_imag[jminus2][bd]; pstr_auto_corr->phi_0_2_imag += vec_x_imag[j][bd] * vec_x_real[jminus2][bd] - vec_x_real[j][bd] * vec_x_imag[jminus2][bd]; pstr_auto_corr->phi_1_1 += vec_x_real[jminus1][bd] * vec_x_real[jminus1][bd] + vec_x_imag[jminus1][bd] * vec_x_imag[jminus1][bd]; pstr_auto_corr->phi_1_2_real += vec_x_real[jminus1][bd] * vec_x_real[jminus2][bd] + vec_x_imag[jminus1][bd] * vec_x_imag[jminus2][bd]; pstr_auto_corr->phi_1_2_imag += vec_x_imag[jminus1][bd] * vec_x_real[jminus2][bd] - vec_x_real[jminus1][bd] * vec_x_imag[jminus2][bd]; pstr_auto_corr->phi_2_2 += vec_x_real[jminus2][bd] * vec_x_real[jminus2][bd] + vec_x_imag[jminus2][bd] * vec_x_imag[jminus2][bd]; } pstr_auto_corr->det = pstr_auto_corr->phi_1_1 * pstr_auto_corr->phi_2_2 - (pstr_auto_corr->phi_1_2_real * pstr_auto_corr->phi_1_2_real + pstr_auto_corr->phi_1_2_imag * pstr_auto_corr->phi_1_2_imag) * SBR_HF_RELAXATION_PARAM; } static void ixheaacd_esbr_chirp_fac_calc(WORD32 *inv_filt_mode, WORD32 *inv_filt_mode_prev, WORD32 num_if_bands, FLOAT32 *bw_array, FLOAT32 *bw_array_prev) { WORD32 i; for (i = 0; i < num_if_bands; i++) { bw_array[i] = ixheaacd_new_bw_table[inv_filt_mode_prev[i]][inv_filt_mode[i]]; if (bw_array[i] < bw_array_prev[i]) bw_array[i] = 0.75000f * bw_array[i] + 0.25000f * bw_array_prev[i]; else bw_array[i] = 0.90625f * bw_array[i] + 0.09375f * bw_array_prev[i]; if (bw_array[i] < 0.015625) bw_array[i] = 0; } } static void ixheaacd_gausssolve(WORD32 n, FLOAT32 a[][MAXDEG + 1], FLOAT32 b[], FLOAT32 y[]) { WORD32 i, j, k, imax; FLOAT32 v; for (i = 0; i < n; i++) { imax = i; for (k = i + 1; k < n; k++) { if (fabs(a[k][i]) > fabs(a[imax][i])) { imax = k; } } if (imax != i) { v = b[imax]; b[imax] = b[i]; b[i] = v; for (j = i; j < n; j++) { v = a[imax][j]; a[imax][j] = a[i][j]; a[i][j] = v; } } v = a[i][i]; b[i] /= v; for (j = i; j < n; j++) { a[i][j] /= v; } for (k = i + 1; k < n; k++) { v = a[k][i]; b[k] -= v * b[i]; for (j = i + 1; j < n; j++) { a[k][j] -= v * a[i][j]; } } } for (i = n - 1; i >= 0; i--) { y[i] = b[i]; for (j = i + 1; j < n; j++) { y[i] -= a[i][j] * y[j]; } } } void ixheaacd_polyfit(WORD32 n, FLOAT32 y[], FLOAT32 p[]) { WORD32 i, j, k; FLOAT32 a[MAXDEG + 1][MAXDEG + 1]; FLOAT32 b[MAXDEG + 1]; FLOAT32 v[2 * MAXDEG + 1]; for (i = 0; i <= MAXDEG; i++) { b[i] = 0.0f; for (j = 0; j <= MAXDEG; j++) { a[i][j] = 0.0f; } } for (k = 0; k < n; k++) { v[0] = 1.0; for (i = 1; i <= 2 * MAXDEG; i++) { v[i] = k * v[i - 1]; } for (i = 0; i <= MAXDEG; i++) { b[i] += v[MAXDEG - i] * y[k]; for (j = 0; j <= MAXDEG; j++) { a[i][j] += v[2 * MAXDEG - i - j]; } } } ixheaacd_gausssolve(MAXDEG + 1, a, b, p); } VOID ixheaacd_pre_processing(FLOAT32 ptr_src_buf_real[][64], FLOAT32 ptr_src_buf_imag[][64], FLOAT32 gain_vector[], WORD32 num_bands, WORD32 start_sample, WORD32 end_sample) { WORD32 k, i; FLOAT32 poly_coeff[4]; FLOAT32 mean_enrg = 0; FLOAT32 low_env_slope[64]; FLOAT32 low_env[64]; FLOAT32 a0; FLOAT32 a1; FLOAT32 a2; FLOAT32 a3; for (k = 0; k < num_bands; k++) { FLOAT32 temp = 0; for (i = start_sample; i < end_sample; i++) { temp += ptr_src_buf_real[i][k] * ptr_src_buf_real[i][k] + ptr_src_buf_imag[i][k] * ptr_src_buf_imag[i][k]; } temp /= (end_sample - start_sample); low_env[k] = (FLOAT32)(10 * log10(temp + 1)); mean_enrg = mean_enrg + low_env[k]; } mean_enrg /= num_bands; ixheaacd_polyfit(num_bands, low_env, poly_coeff); a0 = poly_coeff[0]; a1 = poly_coeff[1]; a2 = poly_coeff[2]; a3 = poly_coeff[3]; for (k = 0; k < num_bands; k++) { FLOAT32 x_low_l = (FLOAT32)k; FLOAT32 low_env_slope_l = a3; low_env_slope_l = low_env_slope_l + a2 * x_low_l; x_low_l = x_low_l * x_low_l; low_env_slope_l = low_env_slope_l + a1 * x_low_l; x_low_l = x_low_l * (FLOAT32)k; low_env_slope_l = low_env_slope_l + a0 * x_low_l; low_env_slope[k] = low_env_slope_l; } for (i = 0; i < num_bands; i++) { gain_vector[i] = (FLOAT32)pow(10, (mean_enrg - low_env_slope[i]) / 20.0f); } } WORD32 ixheaacd_generate_hf(FLOAT32 ptr_src_buf_real[][64], FLOAT32 ptr_src_buf_imag[][64], FLOAT32 ptr_ph_vocod_buf_real[][64], FLOAT32 ptr_ph_vocod_buf_imag[][64], FLOAT32 ptr_dst_buf_real[][64], FLOAT32 ptr_dst_buf_imag[][64], ia_sbr_frame_info_data_struct *ptr_frame_data, ia_sbr_header_data_struct *ptr_header_data) { WORD32 bw_index, i, k, k2, patch = 0; WORD32 co_var_len; WORD32 start_sample, end_sample, goal_sb; WORD32 sb, source_start_band, patch_stride, num_bands_in_patch; WORD32 hbe_flag = ptr_header_data->hbe_flag; FLOAT32 a0r, a0i, a1r, a1i; FLOAT32 bw_array[MAX_NUM_PATCHES] = {0}; ia_auto_corr_ele_struct str_auto_corr; WORD16 *ptr_invf_band_tbl = &ptr_header_data->pstr_freq_band_data ->freq_band_tbl_noise[1]; // offest 1 used as base address of // ptr_invf_band_tbl WORD32 num_if_bands = ptr_header_data->pstr_freq_band_data->num_nf_bands; WORD32 sub_band_start = ptr_header_data->pstr_freq_band_data->sub_band_start; WORD16 *f_master_tbl = ptr_header_data->pstr_freq_band_data->f_master_tbl; WORD32 num_mf_bands = ptr_header_data->pstr_freq_band_data->num_mf_bands; WORD32 *inv_filt_mode = ptr_frame_data->sbr_invf_mode; WORD32 *inv_filt_mode_prev = ptr_frame_data->sbr_invf_mode_prev; WORD32 sbr_patching_mode = ptr_frame_data->sbr_patching_mode; ia_frame_info_struct *p_frame_info = &ptr_frame_data->str_frame_info_details; WORD32 pre_proc_flag = ptr_header_data->pre_proc_flag; WORD32 is_usf_4 = ptr_header_data->is_usf_4; WORD32 fs = ptr_header_data->out_sampling_freq; WORD32 lsb = f_master_tbl[0]; WORD32 usb = f_master_tbl[num_mf_bands]; WORD32 xover_offset = sub_band_start - f_master_tbl[0]; FLOAT32 bw = 0.0f; FLOAT32 fac = 0.0f; FLOAT32 gain; FLOAT32 gain_vector[64]; WORD32 slope_length = 0; WORD32 first_slot_offset = p_frame_info->border_vec[0]; WORD32 end_slot_offs = 0; FLOAT32 *bw_array_prev = ptr_frame_data->bw_array_prev; end_slot_offs = p_frame_info->border_vec[p_frame_info->num_env] - 16; if (is_usf_4) { start_sample = first_slot_offset * 4; end_sample = 64 + end_slot_offs * 4; co_var_len = 76; } else { start_sample = first_slot_offset * 2; end_sample = 32 + end_slot_offs * 2; co_var_len = 38; } if (pre_proc_flag) { ixheaacd_pre_processing(ptr_src_buf_real, ptr_src_buf_imag, gain_vector, f_master_tbl[0], start_sample, end_sample); } ixheaacd_esbr_chirp_fac_calc(inv_filt_mode, inv_filt_mode_prev, num_if_bands, bw_array, bw_array_prev); for (i = start_sample; i < end_sample; i++) { memset(ptr_dst_buf_real[i] + usb, 0, (64 - usb) * sizeof(FLOAT32)); memset(ptr_dst_buf_imag[i] + usb, 0, (64 - usb) * sizeof(FLOAT32)); } if (sbr_patching_mode || !hbe_flag) { FLOAT32 alpha_real[64][2], alpha_imag[64][2]; for (k = 1; k < f_master_tbl[0]; k++) { ixheaacd_esbr_calc_co_variance(&str_auto_corr, &ptr_src_buf_real[0], &ptr_src_buf_imag[0], k, co_var_len); if (str_auto_corr.det == 0.0f) { alpha_real[k][1] = alpha_imag[k][1] = 0; } else { fac = 1.0f / str_auto_corr.det; alpha_real[k][1] = (str_auto_corr.phi_0_1_real * str_auto_corr.phi_1_2_real - str_auto_corr.phi_0_1_imag * str_auto_corr.phi_1_2_imag - str_auto_corr.phi_0_2_real * str_auto_corr.phi_1_1) * fac; alpha_imag[k][1] = (str_auto_corr.phi_0_1_imag * str_auto_corr.phi_1_2_real + str_auto_corr.phi_0_1_real * str_auto_corr.phi_1_2_imag - str_auto_corr.phi_0_2_imag * str_auto_corr.phi_1_1) * fac; } if (str_auto_corr.phi_1_1 == 0) { alpha_real[k][0] = alpha_imag[k][0] = 0; } else { fac = 1.0f / str_auto_corr.phi_1_1; alpha_real[k][0] = -(str_auto_corr.phi_0_1_real + alpha_real[k][1] * str_auto_corr.phi_1_2_real + alpha_imag[k][1] * str_auto_corr.phi_1_2_imag) * fac; alpha_imag[k][0] = -(str_auto_corr.phi_0_1_imag + alpha_imag[k][1] * str_auto_corr.phi_1_2_real - alpha_real[k][1] * str_auto_corr.phi_1_2_imag) * fac; } if ((alpha_real[k][0] * alpha_real[k][0] + alpha_imag[k][0] * alpha_imag[k][0] >= 16.0f) || (alpha_real[k][1] * alpha_real[k][1] + alpha_imag[k][1] * alpha_imag[k][1] >= 16.0f)) { alpha_real[k][0] = 0.0f; alpha_imag[k][0] = 0.0f; alpha_real[k][1] = 0.0f; alpha_imag[k][1] = 0.0f; } } goal_sb = (WORD32)(2.048e6f / fs + 0.5f); { WORD32 index; if (goal_sb < f_master_tbl[num_mf_bands]) { for (index = 0; (f_master_tbl[index] < goal_sb); index++) ; goal_sb = f_master_tbl[index]; } else { goal_sb = f_master_tbl[num_mf_bands]; } } source_start_band = xover_offset + 1; sb = lsb + xover_offset; patch = 0; while (sb < usb) { if (MAX_NUM_PATCHES <= patch) return -1; ptr_frame_data->patch_param.start_subband[patch] = sb; num_bands_in_patch = goal_sb - sb; if (num_bands_in_patch >= lsb - source_start_band) { patch_stride = sb - source_start_band; patch_stride = patch_stride & ~1; num_bands_in_patch = lsb - (sb - patch_stride); num_bands_in_patch = ixheaacd_find_closest_entry(sb + num_bands_in_patch, f_master_tbl, (WORD16)(num_mf_bands), 0) - (WORD32)(sb); } patch_stride = num_bands_in_patch + sb - lsb; patch_stride = (patch_stride + 1) & ~1; source_start_band = 1; if (goal_sb - (sb + num_bands_in_patch) < 3) { goal_sb = usb; } if ((num_bands_in_patch < 3) && (patch > 0) && (sb + num_bands_in_patch == usb)) { for (i = start_sample + slope_length; i < end_sample + slope_length; i++) { for (k2 = sb; k2 < sb + num_bands_in_patch; k2++) { ptr_dst_buf_real[i][k2] = 0.0f; ptr_dst_buf_imag[i][k2] = 0.0f; } } break; } if (num_bands_in_patch <= 0) { return -1; } for (k2 = sb; k2 < sb + num_bands_in_patch; k2++) { k = k2 - patch_stride; bw_index = 0; while (k2 >= ptr_invf_band_tbl[bw_index]) { bw_index++; if (bw_index >= MAX_NOISE_COEFFS) return -1; } if (bw_index >= MAX_NUM_PATCHES) return -1; bw = bw_array[bw_index]; a0r = bw * alpha_real[k][0]; a0i = bw * alpha_imag[k][0]; bw *= bw; a1r = bw * alpha_real[k][1]; a1i = bw * alpha_imag[k][1]; if (pre_proc_flag) { gain = gain_vector[k]; } else { gain = 1.0f; } for (i = start_sample + slope_length; i < end_sample + slope_length; i++) { ptr_dst_buf_real[i][k2] = ptr_src_buf_real[i][k] * gain; ptr_dst_buf_imag[i][k2] = ptr_src_buf_imag[i][k] * gain; if (bw > 0.0f) { ptr_dst_buf_real[i][k2] += (a0r * ptr_src_buf_real[i - 1][k] - a0i * ptr_src_buf_imag[i - 1][k] + a1r * ptr_src_buf_real[i - 2][k] - a1i * ptr_src_buf_imag[i - 2][k]) * gain; ptr_dst_buf_imag[i][k2] += (a0i * ptr_src_buf_real[i - 1][k] + a0r * ptr_src_buf_imag[i - 1][k] + a1i * ptr_src_buf_real[i - 2][k] + a1r * ptr_src_buf_imag[i - 2][k]) * gain; } } } sb += num_bands_in_patch; patch++; } } if (hbe_flag && !sbr_patching_mode) { FLOAT32 alpha_real[2], alpha_imag[2]; bw_index = 0, patch = 1; if (NULL == ptr_ph_vocod_buf_real || NULL == ptr_ph_vocod_buf_imag) return -1; for (k2 = sub_band_start; k2 < f_master_tbl[num_mf_bands]; k2++) { ixheaacd_esbr_calc_co_variance(&str_auto_corr, &ptr_ph_vocod_buf_real[0], &ptr_ph_vocod_buf_imag[0], k2, co_var_len); if (str_auto_corr.det == 0.0f) { alpha_real[1] = alpha_imag[1] = 0; } else { fac = 1.0f / str_auto_corr.det; alpha_real[1] = (str_auto_corr.phi_0_1_real * str_auto_corr.phi_1_2_real - str_auto_corr.phi_0_1_imag * str_auto_corr.phi_1_2_imag - str_auto_corr.phi_0_2_real * str_auto_corr.phi_1_1) * fac; alpha_imag[1] = (str_auto_corr.phi_0_1_imag * str_auto_corr.phi_1_2_real + str_auto_corr.phi_0_1_real * str_auto_corr.phi_1_2_imag - str_auto_corr.phi_0_2_imag * str_auto_corr.phi_1_1) * fac; } if (str_auto_corr.phi_1_1 == 0) { alpha_real[0] = alpha_imag[0] = 0; } else { fac = 1.0f / str_auto_corr.phi_1_1; alpha_real[0] = -(str_auto_corr.phi_0_1_real + alpha_real[1] * str_auto_corr.phi_1_2_real + alpha_imag[1] * str_auto_corr.phi_1_2_imag) * fac; alpha_imag[0] = -(str_auto_corr.phi_0_1_imag + alpha_imag[1] * str_auto_corr.phi_1_2_real - alpha_real[1] * str_auto_corr.phi_1_2_imag) * fac; } if (alpha_real[0] * alpha_real[0] + alpha_imag[0] * alpha_imag[0] >= 16.0f || alpha_real[1] * alpha_real[1] + alpha_imag[1] * alpha_imag[1] >= 16.0f) { alpha_real[0] = 0.0f; alpha_imag[0] = 0.0f; alpha_real[1] = 0.0f; alpha_imag[1] = 0.0f; } while (k2 >= ptr_invf_band_tbl[bw_index]) { bw_index++; if (bw_index >= MAX_NOISE_COEFFS) return -1; } if (bw_index >= MAX_NUM_PATCHES) return -1; bw = bw_array[bw_index]; a0r = bw * alpha_real[0]; a0i = bw * alpha_imag[0]; bw *= bw; a1r = bw * alpha_real[1]; a1i = bw * alpha_imag[1]; if (bw > 0.0f) { for (i = start_sample; i < end_sample; i++) { FLOAT32 real1, imag1, real2, imag2, realTarget, imag_target; realTarget = ptr_ph_vocod_buf_real[i][k2]; imag_target = ptr_ph_vocod_buf_imag[i][k2]; real1 = ptr_ph_vocod_buf_real[i - 1][k2]; imag1 = ptr_ph_vocod_buf_imag[i - 1][k2]; real2 = ptr_ph_vocod_buf_real[i - 2][k2]; imag2 = ptr_ph_vocod_buf_imag[i - 2][k2]; realTarget += ((a0r * real1 - a0i * imag1) + (a1r * real2 - a1i * imag2)); imag_target += ((a0i * real1 + a0r * imag1) + (a1i * real2 + a1r * imag2)); ptr_dst_buf_real[i][k2] = realTarget; ptr_dst_buf_imag[i][k2] = imag_target; } } else { for (i = start_sample; i < end_sample; i++) { ptr_dst_buf_real[i][k2] = ptr_ph_vocod_buf_real[i][k2]; ptr_dst_buf_imag[i][k2] = ptr_ph_vocod_buf_imag[i][k2]; } } } } ptr_frame_data->patch_param.num_patches = patch; if (patch >= (MAX_NUM_PATCHES + 1)) return -1; for (i = 0; i < num_if_bands; i++) { bw_array_prev[i] = bw_array[i]; } return 0; }