| /****************************************************************************** |
| * * |
| * 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 <assert.h> |
| #include <float.h> |
| #include <stdlib.h> |
| #include <stdio.h> |
| #include <math.h> |
| #include <string.h> |
| |
| #include "ixheaacd_type_def.h" |
| #include "ixheaacd_bitbuffer.h" |
| #include "ixheaacd_interface.h" |
| #include "ixheaacd_tns_usac.h" |
| #include "ixheaacd_cnst.h" |
| #include "ixheaacd_acelp_info.h" |
| |
| #include "ixheaacd_sbrdecsettings.h" |
| #include "ixheaacd_info.h" |
| #include "ixheaacd_sbr_common.h" |
| #include "ixheaacd_drc_data_struct.h" |
| #include "ixheaacd_drc_dec.h" |
| #include "ixheaacd_sbrdecoder.h" |
| #include "ixheaacd_mps_polyphase.h" |
| #include "ixheaacd_sbr_const.h" |
| #include "ixheaacd_main.h" |
| #include "ixheaacd_arith_dec.h" |
| |
| #include "ixheaacd_func_def.h" |
| #include "ixheaacd_windows.h" |
| #include "ixheaacd_acelp_com.h" |
| #include "ixheaacd_constants.h" |
| #include "ixheaacd_basic_ops32.h" |
| #include "ixheaacd_basic_ops40.h" |
| |
| #define LSF_GAP_F 50.0f |
| #define FREQ_MAX_F 6400.0f |
| #define FREQ_DIV_F 400.0f |
| |
| extern const FLOAT32 lsf_init[ORDER]; |
| |
| extern const FLOAT32 ixheaacd_fir_lp_filt[1 + FILTER_DELAY]; |
| |
| const WORD32 ixheaacd_pow_10_i_by_128[128] = { |
| 16384, 17788, 19312, 20968, 22765, 24716, 26835, |
| 29135, 31632, 34343, 37287, 40483, 43953, 47720, |
| 51810, 56251, 61072, 66307, 71990, 78161, 84860, |
| 92134, 100030, 108604, 117913, 128019, 138992, 150905, |
| 163840, 177882, 193129, 209682, 227654, 247167, 268352, |
| 291353, 316325, 343438, 372874, 404834, 439532, 477205, |
| 518107, 562515, 610728, 663075, 719908, 781612, 848605, |
| 921340, 1000309, 1086046, 1179133, 1280197, 1389925, 1509057, |
| 1638400, 1778829, 1931294, 2096827, 2276549, 2471675, 2683525, |
| 2913532, 3163255, 3434381, 3728745, 4048340, 4395328, 4772057, |
| 5181075, 5625151, 6107289, 6630752, 7199081, 7816122, 8486051, |
| 9213400, 10003091, 10860467, 11791330, 12801978, 13899250, 15090570, |
| 16384000, 17788290, 19312945, 20968279, 22765494, 24716750, 26835250, |
| 29135329, 31632551, 34343813, 37287459, 40483409, 43953287, 47720573, |
| 51810757, 56251515, 61072895, 66307521, 71990813, 78161226, 84860513, |
| 92134002, 100030911, 108604672, 117913300, 128019781, 138992500, 150905703, |
| 163840000, 177882909, 193129453, 209682794, 227654941, 247167501, 268352504, |
| 291353298, 316325515, 343438130, 372874596, 404834095, 439532879, 477205734, |
| 518107571, 562515151}; |
| |
| VOID ixheaacd_lsf_weight_2st_flt(float *lsfq, float *w, WORD32 mode); |
| |
| static PLATFORM_INLINE WORD32 ixheaacd_mult32_m(WORD32 a, WORD32 b) { |
| WORD32 result; |
| WORD64 temp_result; |
| |
| temp_result = (WORD64)a * (WORD64)b; |
| result = (WORD32)(temp_result >> 31); |
| |
| return (result); |
| } |
| |
| void ixheaacd_reset_acelp_data_fix(ia_usac_data_struct *usac_data, |
| ia_usac_lpd_decoder_handle st, |
| WORD32 *ptr_overlap_buf, |
| WORD32 was_last_short, WORD32 tw_mdct) { |
| WORD32 i; |
| |
| if (was_last_short == 1) { |
| st->mode_prev = -2; |
| } else { |
| st->mode_prev = -1; |
| } |
| |
| for (i = 0; i < NUM_SUBFR_SUPERFRAME_BY2 - 1; i++) { |
| st->pitch_prev[i] = 64; |
| st->gain_prev[i] = 0; |
| } |
| |
| st->bpf_active_prev = 0; |
| |
| if (ptr_overlap_buf != NULL && !tw_mdct) { |
| const WORD32 *ptr_window_coeff; |
| WORD32 fac_length; |
| if (was_last_short) { |
| fac_length = (usac_data->ccfl) / 16; |
| } else { |
| fac_length = (usac_data->len_subfrm) / 2; |
| } |
| |
| if (fac_length == 48) { |
| ptr_window_coeff = ixheaacd_sine_win_96; |
| } else if (fac_length == 64) { |
| ptr_window_coeff = ixheaacd_sine_win_128; |
| } else if (fac_length == 96) { |
| ptr_window_coeff = ixheaacd_sine_win_192; |
| } else { |
| ptr_window_coeff = ixheaacd_sine_win_256; |
| } |
| |
| for (i = 0; i < 2 * fac_length; i++) { |
| ptr_overlap_buf[(usac_data->ccfl) / 2 - fac_length + i] = |
| ixheaacd_mult32_m( |
| ptr_overlap_buf[(usac_data->ccfl) / 2 - fac_length + i], |
| ptr_window_coeff[2 * fac_length - 1 - i]); |
| } |
| for (i = 0; i < (usac_data->ccfl) / 2 - fac_length; i++) { |
| ptr_overlap_buf[(usac_data->ccfl) / 2 + fac_length + i] = 0; |
| } |
| |
| if (ptr_overlap_buf != NULL) { |
| for (i = 0; i < (usac_data->len_subfrm) / 2 - fac_length; i++) { |
| st->exc_prev[i] = 0.0f; |
| } |
| for (i = 0; i < 2 * fac_length + 1; i++) { |
| st->exc_prev[(usac_data->len_subfrm) / 2 - fac_length + i] = |
| ptr_overlap_buf[i + usac_data->ccfl / 2 - fac_length - 1] / |
| (float)(16384); |
| } |
| } else { |
| ixheaacd_memset(st->exc_prev, 1 + (2 * FAC_LENGTH)); |
| } |
| } |
| |
| return; |
| } |
| |
| VOID ixheaacd_fix2flt_data(ia_usac_data_struct *usac_data, |
| ia_usac_lpd_decoder_handle st, WORD32 k) { |
| WORD32 i; |
| WORD32 fac_length; |
| WORD32 window_sequence_last = usac_data->window_sequence_last[k]; |
| WORD32 *p_ola_buffer = usac_data->overlap_data_ptr[k]; |
| if (window_sequence_last == EIGHT_SHORT_SEQUENCE) { |
| fac_length = (usac_data->ccfl) / 16; |
| } else { |
| fac_length = (usac_data->len_subfrm) / 2; |
| } |
| |
| ixheaacd_memset(st->lp_flt_coeff_a_prev, 2 * (ORDER + 1)); |
| ixheaacd_memset(st->xcitation_prev, MAX_PITCH + INTER_LP_FIL_ORDER + 1); |
| ixheaacd_memset(st->synth_prev, MAX_PITCH + SYNTH_DELAY_LMAX); |
| ixheaacd_memset(st->bpf_prev, FILTER_DELAY + LEN_SUBFR); |
| |
| st->gain_threshold = 0.0f; |
| |
| if (p_ola_buffer != NULL) { |
| for (i = 0; i < (usac_data->len_subfrm) / 2 - fac_length; i++) { |
| st->exc_prev[i] = 0; |
| } |
| for (i = 0; i < 2 * fac_length + 1; i++) { |
| st->exc_prev[(usac_data->len_subfrm) / 2 - fac_length + i] = (FLOAT32)( |
| p_ola_buffer[i + usac_data->ccfl / 2 - fac_length - 1] / 16384.0); |
| } |
| } else { |
| ixheaacd_memset(st->exc_prev, 1 + (2 * FAC_LENGTH)); |
| } |
| |
| return; |
| } |
| |
| void ixheaacd_init_acelp_data(ia_usac_data_struct *usac_data, |
| ia_usac_lpd_decoder_handle st) { |
| ixheaacd_reset_acelp_data_fix(usac_data, st, NULL, 0, 0); |
| } |
| |
| #define PI_BY_6400 (PI / 6400.0) |
| #define SCALE1 (6400.0 / PI) |
| |
| void ixheaacd_lsp_2_lsf_conversion(float lsp[], float lsf[], WORD32 m) { |
| short i; |
| for (i = 0; i < m; i++) { |
| lsf[i] = (float)(acos(lsp[i]) * SCALE1); |
| } |
| return; |
| } |
| |
| static VOID ixheaacd_lsf_2_lsp_conversion_float(FLOAT32 lsf[], FLOAT32 lsp[], |
| WORD32 m) { |
| WORD32 i; |
| for (i = 0; i < m; i++) |
| lsp[i] = (FLOAT32)cos((double)lsf[i] * (double)PI_BY_6400); |
| |
| return; |
| } |
| |
| static WORD32 ixheaacd_bass_post_filter(FLOAT32 *synth_sig, WORD32 *pitch, |
| FLOAT32 *pitch_gain, FLOAT32 *synth_out, |
| WORD32 len_fr, WORD32 len2, |
| FLOAT32 bpf_prev[]) { |
| WORD32 i, j, sf, num_subfr, pitch_lag, lg; |
| FLOAT32 x_energy, xy_corr, y_energy, norm_corr, energy, gain, tmp, alpha; |
| FLOAT32 noise_buf[FILTER_DELAY + (2 * LEN_SUBFR)], *noise_tmp1, *noise_tmp2, |
| *x, *y; |
| |
| noise_tmp1 = noise_buf + FILTER_DELAY; |
| noise_tmp2 = noise_buf + FILTER_DELAY + LEN_SUBFR; |
| |
| memcpy(synth_out, synth_sig - LEN_SUBFR, len_fr * sizeof(FLOAT32)); |
| |
| if (len_fr % 64) |
| memset(synth_out + len_fr, 0, (LEN_SUBFR - len_fr % 64) * sizeof(FLOAT32)); |
| |
| sf = 0; |
| for (num_subfr = 0; num_subfr < len_fr; num_subfr += LEN_SUBFR, sf++) { |
| pitch_lag = pitch[sf]; |
| gain = pitch_gain[sf]; |
| if (((pitch_lag >> 1) + 96 - num_subfr) > MAX_PITCH) return -1; |
| if (gain > 1.0f) gain = 1.0f; |
| if (gain < 0.0f) gain = 0.0f; |
| |
| x = &synth_sig[num_subfr - 96]; |
| y = &synth_sig[num_subfr - pitch_lag / 2 - 96]; |
| |
| x_energy = 0.01f; |
| xy_corr = 0.01f; |
| y_energy = 0.01f; |
| for (i = 0; i < LEN_SUBFR + 96; i++) { |
| x_energy += x[i] * x[i]; |
| xy_corr += x[i] * y[i]; |
| y_energy += y[i] * y[i]; |
| } |
| |
| norm_corr = xy_corr / (FLOAT32)sqrt(x_energy * y_energy); |
| |
| if (norm_corr > 0.95f) pitch_lag >>= 1; |
| |
| lg = len_fr + len2 - pitch_lag - num_subfr; |
| if (lg < 0) lg = 0; |
| if (lg > LEN_SUBFR) lg = LEN_SUBFR; |
| |
| if (gain > 0) { |
| if (lg > 0) { |
| tmp = 0.01f; |
| for (i = 0; i < lg; i++) { |
| tmp += synth_sig[i + num_subfr] * synth_sig[i + num_subfr]; |
| } |
| energy = 0.01f; |
| for (i = 0; i < lg; i++) { |
| energy += synth_sig[i + num_subfr + pitch_lag] * |
| synth_sig[i + num_subfr + pitch_lag]; |
| } |
| tmp = (FLOAT32)sqrt(tmp / energy); |
| if (tmp < gain) gain = tmp; |
| } |
| |
| alpha = 0.5f * gain; |
| for (i = 0; i < lg; i++) { |
| noise_tmp2[i] = alpha * (synth_sig[i + num_subfr] - |
| 0.5f * synth_sig[i + num_subfr - pitch_lag] - |
| 0.5f * synth_sig[i + num_subfr + pitch_lag]); |
| } |
| for (i = lg; i < LEN_SUBFR; i++) { |
| noise_tmp2[i] = alpha * (synth_sig[i + num_subfr] - |
| synth_sig[i + num_subfr - pitch_lag]); |
| } |
| } else { |
| memset(noise_tmp2, 0, LEN_SUBFR * sizeof(FLOAT32)); |
| } |
| |
| memcpy(noise_buf, bpf_prev, (FILTER_DELAY + LEN_SUBFR) * sizeof(FLOAT32)); |
| memcpy(bpf_prev, noise_buf + LEN_SUBFR, |
| (FILTER_DELAY + LEN_SUBFR) * sizeof(FLOAT32)); |
| |
| for (i = 0; i < LEN_SUBFR; i++) { |
| tmp = ixheaacd_fir_lp_filt[0] * noise_tmp1[i]; |
| for (j = 1; j <= FILTER_DELAY; j++) { |
| tmp += |
| ixheaacd_fir_lp_filt[j] * (noise_tmp1[i - j] + noise_tmp1[i + j]); |
| } |
| synth_out[i + num_subfr] -= tmp; |
| } |
| } |
| |
| return 0; |
| } |
| |
| void ixheaacd_reorder_lsf(float *lsf, float min_dist, int n) { |
| int i; |
| float lsf_min; |
| |
| lsf_min = min_dist; |
| for (i = 0; i < n; i++) { |
| if (lsf[i] < lsf_min) lsf[i] = lsf_min; |
| |
| lsf_min = lsf[i] + min_dist; |
| } |
| |
| lsf_min = FREQ_MAX_F - min_dist; |
| for (i = n - 1; i >= 0; i--) { |
| if (lsf[i] > lsf_min) lsf[i] = lsf_min; |
| |
| lsf_min = lsf[i] - min_dist; |
| } |
| |
| return; |
| } |
| |
| WORD32 ixheaacd_lpd_dec(ia_usac_data_struct *usac_data, |
| ia_usac_lpd_decoder_handle st, |
| ia_td_frame_data_struct *pstr_td_frame_data, |
| FLOAT32 fsynth[], WORD32 first_lpd_flag, |
| WORD32 short_fac_flag, WORD32 bpf_control_info) { |
| FLOAT32 *synth_buf = usac_data->synth_buf; |
| FLOAT32 *xcitation_buff = usac_data->exc_buf; |
| FLOAT32 lsp_curr[ORDER]; |
| FLOAT32 lsf_curr[ORDER]; |
| FLOAT32 *lp_flt_coff_a = usac_data->lp_flt_coff; |
| FLOAT32 *synth, *xcitation_curr; |
| WORD32 *pitch = usac_data->pitch; |
| FLOAT32 *pitch_gain = usac_data->pitch_gain; |
| FLOAT32 lsf_flt[(2 * NUM_FRAMES + 1) * ORDER]; |
| |
| WORD32 i, k, tp, mode; |
| WORD32 *mod; |
| FLOAT32 gain, stability_factor; |
| FLOAT32 tmp, synth_corr, synth_energy; |
| |
| WORD32 len_fr; |
| WORD32 len_subfrm; |
| WORD32 num_subfr; |
| WORD32 num_subfr_in_superfr; |
| WORD32 num_subfr_by2; |
| WORD32 synth_delay; |
| WORD32 num_samples = 0; |
| |
| WORD32 *ptr_scratch = &usac_data->scratch_buffer[0]; |
| |
| WORD32 subfr_len, n_subfr; |
| WORD32 err = 0; |
| |
| len_fr = usac_data->ccfl; |
| len_subfrm = usac_data->len_subfrm; |
| num_subfr = usac_data->num_subfrm; |
| num_subfr_in_superfr = NUM_FRAMES * num_subfr; |
| num_subfr_by2 = (num_subfr_in_superfr / 2) - 1; |
| synth_delay = num_subfr_by2 * LEN_SUBFR; |
| |
| synth = synth_buf + MAX_PITCH + synth_delay; |
| ixheaacd_mem_cpy(st->synth_prev, synth_buf, MAX_PITCH + synth_delay); |
| ixheaacd_memset(synth, SYNTH_DELAY_LMAX + LEN_SUPERFRAME - synth_delay); |
| |
| xcitation_curr = xcitation_buff + MAX_PITCH + INTER_LP_FIL_ORDER + 1; |
| ixheaacd_mem_cpy(st->xcitation_prev, xcitation_buff, |
| MAX_PITCH + INTER_LP_FIL_ORDER + 1); |
| memset(xcitation_curr, 0, sizeof(FLOAT32) * (LEN_SUPERFRAME + 1)); |
| |
| mod = pstr_td_frame_data->mod; |
| |
| for (i = 0; i < num_subfr_by2; i++) { |
| pitch[i] = st->pitch_prev[i]; |
| pitch_gain[i] = st->gain_prev[i]; |
| } |
| for (i = 0; i < num_subfr_in_superfr; i++) { |
| pitch[i + num_subfr_by2] = 64; |
| pitch_gain[i + num_subfr_by2] = 0.0f; |
| } |
| if (!first_lpd_flag) { |
| ixheaacd_lsp_2_lsf_conversion(st->lspold, lsf_flt, ORDER); |
| } |
| |
| ixheaacd_alg_vec_dequant(pstr_td_frame_data, first_lpd_flag, lsf_flt, |
| pstr_td_frame_data->mod); |
| |
| if (first_lpd_flag) { |
| ixheaacd_mem_cpy(&lsf_flt[0], st->lsf_prev, ORDER); |
| ixheaacd_lsf_2_lsp_conversion_float(st->lsf_prev, st->lspold, ORDER); |
| } |
| |
| if ((first_lpd_flag && mod[0] == 0) || (first_lpd_flag && mod[1] == 0) || |
| ((first_lpd_flag && mod[2] == 0 && len_subfrm != LEN_FRAME))) { |
| FLOAT32 lp_flt_coeff_a[9 * (ORDER + 1)]; |
| FLOAT32 tmp_buf[3 * LEN_FRAME + ORDER]; |
| FLOAT32 tmp_res_buf[3 * LEN_FRAME]; |
| FLOAT32 *tmp = &(tmp_buf[LEN_FRAME]); |
| FLOAT32 *ptr_tmp = &(tmp_res_buf[LEN_FRAME]); |
| WORD32 tmp_start; |
| FLOAT32 mem = 0; |
| WORD32 gain; |
| WORD32 length; |
| |
| ixheaacd_interpolation_lsp_params(st->lspold, st->lspold, lp_flt_coeff_a, |
| 8); |
| |
| memcpy(st->lp_flt_coeff_a_prev, lp_flt_coeff_a, |
| (ORDER + 1) * sizeof(FLOAT32)); |
| memcpy(st->lp_flt_coeff_a_prev + ORDER + 1, lp_flt_coeff_a, |
| (ORDER + 1) * sizeof(FLOAT32)); |
| |
| if (mod[0] == 0) { |
| WORD32 fac_length; |
| if (short_fac_flag) { |
| fac_length = (len_subfrm * NUM_FRAMES) / 16; |
| } else { |
| fac_length = len_subfrm / 2; |
| } |
| if ((pstr_td_frame_data->fac_data[0] < 0) || |
| (pstr_td_frame_data->fac_data[0] > 128)) { |
| return -1; |
| } |
| gain = ixheaacd_pow_10_i_by_128[pstr_td_frame_data->fac_data[0]]; |
| |
| memcpy(ptr_scratch, &pstr_td_frame_data->fac_data[0], |
| 129 * sizeof(WORD32)); |
| |
| for (i = 0; i < fac_length / 2; i++) { |
| pstr_td_frame_data->fac_data[i] = ptr_scratch[2 * i + 1] << 16; |
| pstr_td_frame_data->fac_data[fac_length / 2 + i] = |
| ptr_scratch[fac_length - 2 * i] << 16; |
| } |
| |
| err = ixheaacd_fwd_alias_cancel_tool(usac_data, pstr_td_frame_data, |
| fac_length, lp_flt_coeff_a, gain); |
| if (err == -1) return err; |
| |
| memset( |
| &usac_data->overlap_data_ptr[usac_data->present_chan][(len_fr / 2)], |
| 0, fac_length * sizeof(WORD32)); |
| } |
| |
| for (i = 0; i < 2 * len_subfrm; i++) |
| st->fd_synth[ORDER + i] = (FLOAT32)( |
| (FLOAT32)usac_data->overlap_data_ptr[usac_data->present_chan][i] / |
| 16384.0); |
| num_samples = min(2 * len_subfrm, MAX_PITCH + synth_delay); |
| |
| ixheaacd_mem_cpy(st->fd_synth + ORDER, synth - 2 * len_subfrm, |
| 2 * len_subfrm); |
| |
| ixheaacd_preemphsis_tool_float(st->fd_synth + ORDER, PREEMPH_FILT_FAC, |
| 2 * len_subfrm, mem); |
| |
| ixheaacd_memset(tmp, ORDER); |
| ixheaacd_mem_cpy(st->fd_synth + ORDER, tmp + ORDER, 2 * len_subfrm); |
| tmp_start = 0; |
| |
| ixheaacd_memset(ptr_tmp - len_subfrm, 3 * len_subfrm); |
| memset(st->fd_synth, 0, ORDER * sizeof(WORD32)); |
| length = (2 * len_subfrm - tmp_start) / LEN_SUBFR; |
| |
| ixheaacd_residual_tool_float1(lp_flt_coeff_a, |
| &st->fd_synth[ORDER + tmp_start], |
| &ptr_tmp[tmp_start], LEN_SUBFR, length); |
| |
| if (mod[0] != 0 && (len_subfrm == LEN_FRAME || mod[1] != 0)) { |
| num_samples = min(len_subfrm, MAX_PITCH + INTER_LP_FIL_ORDER + 1); |
| } else { |
| num_samples = min(2 * len_subfrm, MAX_PITCH + INTER_LP_FIL_ORDER + 1); |
| } |
| ixheaacd_mem_cpy(ptr_tmp + 2 * len_subfrm - num_samples, |
| xcitation_curr - num_samples, num_samples); |
| } |
| |
| k = 0; |
| |
| while (k < 4) { |
| mode = mod[k]; |
| if ((st->mode_prev == 0) && (mode > 0) && |
| (k != 0 || st->bpf_active_prev == 1)) { |
| i = (k * num_subfr) + num_subfr_by2; |
| pitch[i + 1] = pitch[i] = pitch[i - 1]; |
| pitch_gain[i + 1] = pitch_gain[i] = pitch_gain[i - 1]; |
| } |
| |
| if ((mode == 0) || (mode == 1)) |
| memcpy(lsf_curr, &lsf_flt[(k + 1) * ORDER], ORDER * sizeof(FLOAT32)); |
| else if (mode == 2) |
| memcpy(lsf_curr, &lsf_flt[(k + 2) * ORDER], ORDER * sizeof(FLOAT32)); |
| else |
| memcpy(lsf_curr, &lsf_flt[(k + 4) * ORDER], ORDER * sizeof(FLOAT32)); |
| |
| ixheaacd_lsf_2_lsp_conversion_float(lsf_curr, lsp_curr, ORDER); |
| |
| tmp = 0.0f; |
| for (i = 0; i < ORDER; i++) { |
| tmp += (lsf_curr[i] - st->lsf_prev[i]) * (lsf_curr[i] - st->lsf_prev[i]); |
| } |
| stability_factor = (FLOAT32)(1.25f - (tmp / 400000.0f)); |
| if (stability_factor > 1.0f) { |
| stability_factor = 1.0f; |
| } |
| if (stability_factor < 0.0f) { |
| stability_factor = 0.0f; |
| } |
| |
| if (mode == 0) { |
| ixheaacd_interpolation_lsp_params(st->lspold, lsp_curr, lp_flt_coff_a, |
| num_subfr); |
| |
| ixheaacd_acelp_alias_cnx(usac_data, pstr_td_frame_data, k, lp_flt_coff_a, |
| stability_factor, st); |
| |
| if ((st->mode_prev != 0) && bpf_control_info) { |
| i = (k * num_subfr) + num_subfr_by2; |
| pitch[i - 1] = pitch[i]; |
| pitch_gain[i - 1] = pitch_gain[i]; |
| if (st->mode_prev != -2) { |
| pitch[i - 2] = pitch[i]; |
| pitch_gain[i - 2] = pitch_gain[i]; |
| } |
| } |
| k++; |
| } else { |
| if (mode == 1) { |
| subfr_len = len_subfrm; |
| n_subfr = num_subfr; |
| } else if (mode == 2) { |
| subfr_len = len_subfrm << 1; |
| n_subfr = num_subfr_in_superfr / 2; |
| } else if (mode == 3) { |
| subfr_len = len_subfrm << 2; |
| n_subfr = num_subfr_in_superfr; |
| } |
| |
| ixheaacd_lpc_coef_gen(st->lspold, lsp_curr, lp_flt_coff_a, n_subfr, |
| ORDER); |
| |
| ixheaacd_tcx_mdct(usac_data, pstr_td_frame_data, k, lp_flt_coff_a, |
| subfr_len, st); |
| k += (1 << (mode - 1)); |
| } |
| |
| st->mode_prev = mode; |
| |
| ixheaacd_mem_cpy(lsp_curr, st->lspold, ORDER); |
| ixheaacd_mem_cpy(lsf_curr, st->lsf_prev, ORDER); |
| } |
| |
| ixheaacd_mem_cpy(xcitation_buff + len_fr, st->xcitation_prev, |
| MAX_PITCH + INTER_LP_FIL_ORDER + 1); |
| |
| ixheaacd_mem_cpy(synth_buf + len_fr, st->synth_prev, MAX_PITCH + synth_delay); |
| |
| if (!bpf_control_info) { |
| if (mod[0] != 0 && st->bpf_active_prev) { |
| for (i = 2; i < num_subfr_in_superfr; i++) |
| pitch_gain[num_subfr_by2 + i] = 0.0; |
| } else { |
| for (i = 0; i < num_subfr_in_superfr; i++) |
| pitch_gain[num_subfr_by2 + i] = 0.0; |
| } |
| } |
| st->bpf_active_prev = bpf_control_info; |
| |
| for (i = 0; i < num_subfr_by2; i++) { |
| st->pitch_prev[i] = pitch[num_subfr_in_superfr + i]; |
| st->gain_prev[i] = pitch_gain[num_subfr_in_superfr + i]; |
| } |
| |
| synth = synth_buf + MAX_PITCH; |
| |
| for (i = 0; i < num_subfr_in_superfr; i++) { |
| tp = pitch[i]; |
| gain = pitch_gain[i]; |
| if (gain > 0.0f) { |
| synth_corr = 0.0f, synth_energy = 1e-6f; |
| if ((((i * LEN_SUBFR) + LEN_SUBFR) > LEN_SUPERFRAME) || |
| ((((i * LEN_SUBFR) + LEN_SUBFR) - tp) > LEN_SUPERFRAME)) |
| return -1; |
| for (k = 0; k < LEN_SUBFR; k++) { |
| synth_corr += |
| synth[i * LEN_SUBFR + k] * synth[(i * LEN_SUBFR) - tp + k]; |
| synth_energy += |
| synth[(i * LEN_SUBFR) - tp + k] * synth[(i * LEN_SUBFR) - tp + k]; |
| } |
| pitch_gain[i] = synth_corr / synth_energy; |
| } |
| } |
| |
| if (mod[3] == 0) { |
| err = ixheaacd_bass_post_filter(synth, pitch, pitch_gain, fsynth, len_fr, |
| synth_delay, st->bpf_prev); |
| } else { |
| err = |
| ixheaacd_bass_post_filter(synth, pitch, pitch_gain, fsynth, len_fr, |
| synth_delay - (len_subfrm / 2), st->bpf_prev); |
| } |
| return err; |
| } |
| |
| WORD32 ixheaacd_lpd_dec_update(ia_usac_lpd_decoder_handle tddec, |
| ia_usac_data_struct *usac_data, WORD32 i_ch) { |
| WORD32 err = 0, i, k; |
| |
| WORD32 *ptr_overlap = &usac_data->overlap_data_ptr[i_ch][0]; |
| WORD32 len_fr, lpd_sbf_len, lpd_delay, num_subfr_by2, synth_delay, fac_length; |
| |
| if (usac_data->tw_mdct[0]) |
| ptr_overlap = &usac_data->overlap_data_ptr[i_ch][usac_data->ccfl / 2]; |
| |
| len_fr = usac_data->ccfl; |
| lpd_sbf_len = (NUM_FRAMES * usac_data->num_subfrm) / 2; |
| lpd_delay = lpd_sbf_len * LEN_SUBFR; |
| num_subfr_by2 = lpd_sbf_len - 1; |
| synth_delay = num_subfr_by2 * LEN_SUBFR; |
| fac_length = (usac_data->len_subfrm) / 2; |
| |
| for (i = 0; i < LEN_SUBFR + synth_delay; i++) |
| ptr_overlap[i] = (WORD32)( |
| (FLOAT32)tddec->synth_prev[MAX_PITCH - (LEN_SUBFR) + i] * 16384.0); |
| |
| ptr_overlap += LEN_SUBFR + synth_delay - fac_length; |
| |
| for (k = 0; k < 2 * fac_length; k++) |
| ptr_overlap[k] = (WORD32)((FLOAT32)tddec->exc_prev[k + 1] * 16384.0); |
| |
| ptr_overlap = &usac_data->overlap_data_ptr[i_ch][lpd_delay + fac_length]; |
| |
| for (i = 0; i < len_fr - lpd_delay - fac_length; i++) ptr_overlap[i] = 0; |
| |
| usac_data->window_shape[i_ch] = WIN_SEL_0; |
| usac_data->window_sequence_last[i_ch] = EIGHT_SHORT_SEQUENCE; |
| usac_data->td_frame_prev[i_ch] = 1; |
| |
| if (tddec->mode_prev == 0) { |
| memmove(usac_data->lpc_prev[i_ch], &tddec->lp_flt_coeff_a_prev[ORDER + 1], |
| (ORDER + 1) * sizeof(FLOAT32)); |
| memmove(usac_data->acelp_in[i_ch], tddec->exc_prev, |
| (1 + (2 * FAC_LENGTH)) * sizeof(FLOAT32)); |
| } |
| |
| return err; |
| } |
| |
| WORD32 ixheaacd_lpd_bpf_fix(ia_usac_data_struct *usac_data, |
| WORD32 is_short_flag, FLOAT32 out_buffer[], |
| ia_usac_lpd_decoder_handle st) { |
| WORD32 i, tp, k; |
| float synth_buf[MAX_PITCH + SYNTH_DELAY_LMAX + LEN_SUPERFRAME]; |
| float signal_out[LEN_SUPERFRAME]; |
| float *synth, synth_corr, synth_energy; |
| WORD32 pitch[NUM_SUBFR_SUPERFRAME_BY2 + 3]; |
| float pitch_gain[NUM_SUBFR_SUPERFRAME_BY2 + 3]; |
| WORD32 len_fr, lpd_sbf_len, lpd_delay, num_subfr_by2, synth_delay, fac_length; |
| WORD32 err = 0; |
| |
| len_fr = usac_data->ccfl; |
| lpd_sbf_len = (NUM_FRAMES * usac_data->num_subfrm) / 2; |
| lpd_delay = lpd_sbf_len * LEN_SUBFR; |
| num_subfr_by2 = lpd_sbf_len - 1; |
| synth_delay = num_subfr_by2 * LEN_SUBFR; |
| fac_length = (usac_data->len_subfrm) / 2; |
| |
| ixheaacd_memset(synth_buf, MAX_PITCH + synth_delay + len_fr); |
| ixheaacd_mem_cpy(st->synth_prev, synth_buf, MAX_PITCH + synth_delay); |
| ixheaacd_mem_cpy(out_buffer, synth_buf + MAX_PITCH - (LEN_SUBFR), |
| synth_delay + len_fr + (LEN_SUBFR)); |
| |
| for (i = 0; i < num_subfr_by2; i++) { |
| pitch[i] = st->pitch_prev[i]; |
| pitch_gain[i] = st->gain_prev[i]; |
| } |
| for (i = num_subfr_by2; i < lpd_sbf_len + 3; i++) { |
| pitch[i] = 64; |
| pitch_gain[i] = 0.0f; |
| } |
| if (st->mode_prev == 0) { |
| pitch[num_subfr_by2] = pitch[num_subfr_by2 - 1]; |
| pitch_gain[num_subfr_by2] = pitch_gain[num_subfr_by2 - 1]; |
| if (!is_short_flag) { |
| pitch[num_subfr_by2 + 1] = pitch[num_subfr_by2]; |
| pitch_gain[num_subfr_by2 + 1] = pitch_gain[num_subfr_by2]; |
| } |
| } |
| |
| synth = synth_buf + MAX_PITCH; |
| |
| for (i = 0; i < num_subfr_by2 + 2; i++) { |
| tp = pitch[i]; |
| if ((i * LEN_SUBFR + MAX_PITCH) < tp) { |
| return -1; |
| } else if (((i * LEN_SUBFR + MAX_PITCH - tp) >= 1883) || |
| (((i * LEN_SUBFR) + LEN_SUBFR) > LEN_SUPERFRAME) || |
| ((((i * LEN_SUBFR) + LEN_SUBFR) - tp) > LEN_SUPERFRAME)) { |
| return -1; |
| } |
| |
| if (pitch_gain[i] > 0.0f) { |
| synth_corr = 0.0f, synth_energy = 1e-6f; |
| for (k = 0; k < LEN_SUBFR; k++) { |
| synth_corr += |
| synth[i * LEN_SUBFR + k] * synth[(i * LEN_SUBFR) - tp + k]; |
| synth_energy += |
| synth[(i * LEN_SUBFR) - tp + k] * synth[(i * LEN_SUBFR) - tp + k]; |
| } |
| pitch_gain[i] = synth_corr / synth_energy; |
| } |
| } |
| |
| err = ixheaacd_bass_post_filter(synth, pitch, pitch_gain, signal_out, |
| (lpd_sbf_len + 2) * LEN_SUBFR + LEN_SUBFR, |
| len_fr - (lpd_sbf_len + 4) * LEN_SUBFR, |
| st->bpf_prev); |
| if (err != 0) return err; |
| |
| ixheaacd_mem_cpy(signal_out, out_buffer, |
| (lpd_sbf_len + 2) * LEN_SUBFR + LEN_SUBFR); |
| return err; |
| } |
