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-rw-r--r--decoder/ixheaacd_aac_ec.c457
1 files changed, 457 insertions, 0 deletions
diff --git a/decoder/ixheaacd_aac_ec.c b/decoder/ixheaacd_aac_ec.c
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+++ b/decoder/ixheaacd_aac_ec.c
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+/******************************************************************************
+ * *
+ * Copyright (C) 2023 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 <stdio.h>
+#include <string.h>
+#include <math.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_sbr_common.h"
+#include "ixheaacd_error_standards.h"
+
+#include <ixheaacd_cnst.h>
+#include "ixheaacd_constants.h"
+#include "ixheaacd_intrinsics.h"
+#include "ixheaacd_common_rom.h"
+#include "ixheaacd_sbrdecsettings.h"
+#include "ixheaacd_bitbuffer.h"
+#include "ixheaacd_defines.h"
+
+#include "ixheaacd_pns.h"
+
+#include <ixheaacd_aac_rom.h>
+#include "ixheaacd_pulsedata.h"
+
+#include "ixheaacd_drc_data_struct.h"
+
+#include "ixheaacd_interface.h"
+#include "ixheaacd_info.h"
+#include "ixheaacd_lt_predict.h"
+#include "ixheaacd_ec_defines.h"
+#include "ixheaacd_ec_rom.h"
+#include "ixheaacd_ec_struct_def.h"
+#include "ixheaacd_channelinfo.h"
+#include "ixheaacd_error_standards.h"
+
+#include "ixheaacd_aac_rom.h"
+
+static WORD32 ixheaacd_aac_ec_get_win_seq(WORD32 prev_win_seq) {
+ WORD32 new_win_seq = ONLY_LONG_SEQUENCE;
+
+ if (prev_win_seq == LONG_START_SEQUENCE || prev_win_seq == EIGHT_SHORT_SEQUENCE) {
+ new_win_seq = LONG_STOP_SEQUENCE;
+ }
+
+ return new_win_seq;
+}
+
+static VOID ixheaacd_aac_ec_flip_spec_sign(WORD32 *ptr_spec_coeff, WORD32 num_samples) {
+ WORD32 idx;
+ WORD32 random_value;
+
+ for (idx = 0; idx < num_samples; idx++) {
+ random_value = ptr_spec_coeff[idx] ^ idx;
+ if ((random_value & 1) == 0) {
+ ptr_spec_coeff[idx] = ixheaacd_negate32_sat(ptr_spec_coeff[idx]);
+ }
+ }
+}
+
+static VOID ixheaacd_aac_ec_store(ia_ec_state_str *pstr_ec_state,
+ ia_aac_dec_channel_info_struct *pstr_aac_dec_channel_info,
+ ia_ics_info_struct *pstr_ics_info) {
+ WORD32 *ptr_spec_coeff = pstr_aac_dec_channel_info->ptr_spec_coeff;
+ WORD16 *ptr_spec_scale = pstr_aac_dec_channel_info->ptr_scale_factor;
+ UWORD8 win_shape = pstr_ec_state->win_shape;
+ WORD32 win_seq = pstr_ec_state->win_seq;
+ WORD16 q_spec_scale[MAX_SPEC_SCALE_LEN];
+ WORD32 *ptr_temp_spec_coeff = &pstr_ec_state->str_ec_scratch.spec_coeff[0];
+
+ memcpy(q_spec_scale, pstr_ec_state->q_spec_coeff, sizeof(q_spec_scale));
+
+ pstr_ec_state->win_seq = pstr_ics_info->window_sequence;
+ pstr_ec_state->win_shape = (UWORD8)pstr_ics_info->window_shape;
+ pstr_ec_state->prev_win_group_len =
+ *(pstr_ics_info->window_group_length + pstr_ics_info->num_window_groups - 1);
+
+ memcpy(pstr_ec_state->q_spec_coeff, ptr_spec_scale, sizeof(pstr_ec_state->q_spec_coeff));
+
+ memcpy(ptr_temp_spec_coeff, ptr_spec_coeff, LEN_SUPERFRAME * sizeof(ptr_temp_spec_coeff[0]));
+ memcpy(ptr_spec_coeff, pstr_ec_state->spectral_coeff,
+ LEN_SUPERFRAME * sizeof(ptr_spec_coeff[0]));
+ memcpy(pstr_ec_state->spectral_coeff, ptr_temp_spec_coeff,
+ sizeof(pstr_ec_state->spectral_coeff));
+ pstr_ics_info->window_sequence = win_seq;
+ pstr_ics_info->window_shape = win_shape;
+
+ memcpy(ptr_spec_scale, q_spec_scale, MAX_SPEC_SCALE_LEN * sizeof(ptr_spec_scale[0]));
+}
+
+static VOID ixheaacd_aac_ec_calc_sfb_nrg(WORD32 *ptr_spec_coeff,
+ const ia_usac_samp_rate_info *pstr_samp_rate_info,
+ const WORD32 win_seq, WORD32 win_trans,
+ WORD32 *ptr_sfb_energy) {
+ const WORD16 *ptr_sfb_offset;
+ WORD32 line = 0, sfb, total_scale_factor_bands = 0;
+
+ switch (win_seq) {
+ case EIGHT_SHORT_SEQUENCE:
+
+ if (win_trans == NO_TRANSITION) {
+ total_scale_factor_bands = pstr_samp_rate_info->num_sfb_128 - 1;
+ ptr_sfb_offset = pstr_samp_rate_info->ptr_sfb_128;
+
+ for (sfb = 0; sfb < total_scale_factor_bands; sfb++) {
+ WORD32 accu = 1;
+ WORD32 q_nrg;
+ if (sfb == 0) {
+ q_nrg = (sizeof(accu) << 3) - ixheaacd_norm32(ptr_sfb_offset[sfb] - 0);
+ for (; line < ptr_sfb_offset[sfb]; line++) {
+ accu += ixheaacd_mult32(ptr_spec_coeff[line], ptr_spec_coeff[line]) >> q_nrg;
+ }
+ ptr_sfb_energy[sfb] = ixheaacd_norm32(accu);
+ }
+ q_nrg = (sizeof(accu) << 3) -
+ ixheaacd_norm32(ptr_sfb_offset[sfb + 1] - ptr_sfb_offset[sfb]);
+ for (; line < ptr_sfb_offset[sfb + 1]; line++) {
+ accu += ixheaacd_mult32(ptr_spec_coeff[line], ptr_spec_coeff[line]) >> q_nrg;
+ }
+ ptr_sfb_energy[sfb] = ixheaacd_norm32(accu);
+ }
+ } else {
+ total_scale_factor_bands = pstr_samp_rate_info->num_sfb_1024 - 1;
+ ptr_sfb_offset = pstr_samp_rate_info->ptr_sfb_1024;
+
+ for (sfb = 0; sfb < total_scale_factor_bands; sfb++) {
+ WORD32 accu = 1;
+ WORD32 q_nrg;
+ if (sfb == 0) {
+ q_nrg = (sizeof(accu) << 3) - ixheaacd_norm32(ptr_sfb_offset[sfb] - 0);
+ for (; line < ptr_sfb_offset[sfb]; line++) {
+ accu +=
+ ixheaacd_mult32(ptr_spec_coeff[line >> 3], ptr_spec_coeff[line >> 3]) >> q_nrg;
+ }
+ ptr_sfb_energy[sfb] = ixheaacd_norm32(accu);
+ }
+ q_nrg = (sizeof(accu) << 3) -
+ ixheaacd_norm32(ptr_sfb_offset[sfb + 1] - ptr_sfb_offset[sfb]);
+ for (; line < ptr_sfb_offset[sfb + 1]; line++) {
+ accu +=
+ ixheaacd_mult32(ptr_spec_coeff[line >> 3], ptr_spec_coeff[line >> 3]) >> q_nrg;
+ }
+ ptr_sfb_energy[sfb] = ixheaacd_norm32(accu);
+ }
+ }
+ break;
+
+ case ONLY_LONG_SEQUENCE:
+ case LONG_START_SEQUENCE:
+ case LONG_STOP_SEQUENCE:
+
+ if (win_trans == NO_TRANSITION) {
+ total_scale_factor_bands = pstr_samp_rate_info->num_sfb_1024 - 1;
+ ptr_sfb_offset = pstr_samp_rate_info->ptr_sfb_1024;
+
+ for (sfb = 0; sfb < total_scale_factor_bands; sfb++) {
+ WORD32 accu = 1;
+ WORD32 q_nrg;
+ if (sfb == 0) {
+ q_nrg = (sizeof(accu) << 3) - ixheaacd_norm32(ptr_sfb_offset[sfb] - 0);
+ for (; line < ptr_sfb_offset[sfb]; line++) {
+ accu += ixheaacd_mult32(ptr_spec_coeff[line], ptr_spec_coeff[line]) >> q_nrg;
+ }
+ ptr_sfb_energy[sfb] = ixheaacd_norm32(accu);
+ }
+ q_nrg = (sizeof(accu) << 3) -
+ ixheaacd_norm32(ptr_sfb_offset[sfb + 1] - ptr_sfb_offset[sfb]);
+ for (; line < ptr_sfb_offset[sfb + 1]; line++) {
+ accu += ixheaacd_mult32(ptr_spec_coeff[line], ptr_spec_coeff[line]) >> q_nrg;
+ }
+ ptr_sfb_energy[sfb] = ixheaacd_norm32(accu);
+ }
+ } else {
+ total_scale_factor_bands = pstr_samp_rate_info->num_sfb_128 - 1;
+ ptr_sfb_offset = pstr_samp_rate_info->ptr_sfb_128;
+
+ for (sfb = 0; sfb < total_scale_factor_bands; sfb++) {
+ WORD32 accu = 1;
+ WORD32 q_nrg;
+ if (sfb == 0) {
+ q_nrg = (sizeof(accu) << 3) - ixheaacd_norm32(ptr_sfb_offset[sfb] - 0);
+ for (; line < ptr_sfb_offset[sfb] << 3; line++) {
+ accu += (accu +
+ (ixheaacd_mult32(ptr_spec_coeff[line], ptr_spec_coeff[line]) >> q_nrg)) >>
+ 3;
+ }
+ ptr_sfb_energy[sfb] = ixheaacd_norm32(accu);
+ }
+ q_nrg = (sizeof(accu) << 3) -
+ ixheaacd_norm32(ptr_sfb_offset[sfb + 1] - ptr_sfb_offset[sfb]);
+ for (; line < ptr_sfb_offset[sfb + 1] << 3; line++) {
+ accu +=
+ (accu + (ixheaacd_mult32(ptr_spec_coeff[line], ptr_spec_coeff[line]) >> q_nrg)) >>
+ 3;
+ }
+ ptr_sfb_energy[sfb] = ixheaacd_norm32(accu);
+ }
+ }
+ break;
+ }
+}
+
+static VOID ixheaacd_aac_ec_interpolate(WORD32 *ptr_spec_coeff, WORD16 *ptr_spec_scale_prev,
+ WORD16 *ptr_spec_scale_act, WORD16 *ptr_spec_scale_out,
+ WORD32 *nrg_prev, WORD32 *nrg_act, WORD32 num_sfb,
+ const WORD16 *ptr_sfb_offset) {
+ WORD32 sfb, line = 0;
+ WORD32 fac_shift;
+ WORD32 fac_mod;
+
+ for (sfb = 0; sfb < num_sfb; sfb++) {
+ fac_shift =
+ nrg_prev[sfb] - nrg_act[sfb] + ((*ptr_spec_scale_act - *ptr_spec_scale_prev) << 1);
+ fac_mod = fac_shift & 3;
+ fac_shift = (fac_shift >> 2) + 1;
+ fac_shift += *ptr_spec_scale_prev - max(*ptr_spec_scale_prev, *ptr_spec_scale_act);
+ fac_shift = max(min(fac_shift, INT_BITS - 1), -(INT_BITS - 1));
+
+ for (; line < ptr_sfb_offset[sfb]; line++) {
+ WORD32 accu =
+ ixheaacd_mult32x16in32_shl(ptr_spec_coeff[line], ia_ec_interpolation_fac[fac_mod]);
+ ptr_spec_coeff[line] = ixheaacd_shl32_dir_sat(accu, fac_shift);
+ }
+ }
+ *ptr_spec_scale_out = max(*ptr_spec_scale_prev, *ptr_spec_scale_act);
+}
+
+static VOID ixheaacd_aac_ec_state(ia_ec_state_str *pstr_ec_state, WORD32 frame_status) {
+ WORD32 ec_state_val = (pstr_ec_state->prev_frame_ok[0] << 2) +
+ (pstr_ec_state->prev_frame_ok[1] << 1) + (frame_status);
+
+ switch (ec_state_val) {
+ case 0:
+ case 4:
+ if (pstr_ec_state->fade_idx < MAX_FADE_FRAMES) {
+ pstr_ec_state->fade_idx++;
+ }
+ pstr_ec_state->conceal_state = FRAME_CONCEAL_SINGLE;
+ break;
+ case 1:
+ case 2:
+ if (pstr_ec_state->fade_idx > 0) {
+ pstr_ec_state->fade_idx--;
+ }
+ pstr_ec_state->conceal_state = FRAME_FADE;
+ break;
+ case 5:
+ if (pstr_ec_state->fade_idx > 0) {
+ pstr_ec_state->fade_idx--;
+ }
+ pstr_ec_state->conceal_state = FRAME_OKAY;
+ break;
+ break;
+ case 3:
+ case 6:
+ case 7:
+ if (pstr_ec_state->fade_idx > 0) {
+ pstr_ec_state->fade_idx--;
+ }
+ pstr_ec_state->conceal_state = FRAME_OKAY;
+ break;
+ default:
+ pstr_ec_state->conceal_state = FRAME_OKAY;
+ }
+ if (pstr_ec_state->fade_idx > MAX_FADE_FRAMES) {
+ pstr_ec_state->fade_idx = MAX_FADE_FRAMES;
+ }
+ if (pstr_ec_state->fade_idx == MAX_FADE_FRAMES) {
+ pstr_ec_state->conceal_state = FRAME_MUTE;
+ }
+ if (pstr_ec_state->fade_idx < 0) {
+ pstr_ec_state->fade_idx = 0;
+ }
+}
+
+static VOID ixheaacd_aac_ec_interpolate_frame(
+ ia_ec_state_str *pstr_ec_state, ia_aac_dec_channel_info_struct *pstr_aac_dec_channel_info,
+ const ia_usac_samp_rate_info *pstr_samp_rate_info, const WORD32 num_samples,
+ const WORD32 frame_status, ia_ics_info_struct *pstr_ics_info) {
+ WORD32 *ptr_spec_coeff = pstr_aac_dec_channel_info->ptr_spec_coeff;
+ WORD16 *ptr_spec_scale = pstr_aac_dec_channel_info->ptr_scale_factor;
+
+ WORD32 sfb_nrg_prev[WIN_LEN_64];
+ WORD32 sfb_nrg_act[WIN_LEN_64];
+
+ WORD32 idx;
+
+ memset(sfb_nrg_prev, 0, sizeof(sfb_nrg_prev));
+ memset(sfb_nrg_act, 0, sizeof(sfb_nrg_act));
+
+ if (!frame_status) {
+ pstr_ics_info->window_shape = pstr_ec_state->win_shape;
+ pstr_ics_info->window_sequence = pstr_ec_state->win_seq;
+
+ for (idx = 0; idx < num_samples; idx++) {
+ ptr_spec_coeff[idx] = pstr_ec_state->spectral_coeff[idx];
+ }
+
+ memcpy(ptr_spec_scale, pstr_ec_state->q_spec_coeff, 8 * sizeof(ptr_spec_scale[0]));
+ }
+
+ if (!pstr_ec_state->prev_frame_ok[1]) {
+ if (frame_status && pstr_ec_state->prev_frame_ok[0]) {
+ if (pstr_ics_info->window_sequence == EIGHT_SHORT_SEQUENCE) {
+ WORD32 window;
+ if (pstr_ec_state->win_seq == EIGHT_SHORT_SEQUENCE) {
+ WORD32 total_scale_factor_bands = pstr_samp_rate_info->num_sfb_128 - 1;
+ const WORD16 *ptr_sfb_offset = pstr_samp_rate_info->ptr_sfb_128;
+ pstr_ics_info->window_shape = 1;
+ pstr_ics_info->window_sequence = EIGHT_SHORT_SEQUENCE;
+
+ for (window = 0; window < 8; window++) {
+ ixheaacd_aac_ec_calc_sfb_nrg(&ptr_spec_coeff[window * (num_samples / 8)],
+ pstr_samp_rate_info, EIGHT_SHORT_SEQUENCE, NO_TRANSITION,
+ sfb_nrg_prev);
+
+ ixheaacd_aac_ec_calc_sfb_nrg(
+ &pstr_ec_state->spectral_coeff[window * (num_samples / 8)], pstr_samp_rate_info,
+ EIGHT_SHORT_SEQUENCE, NO_TRANSITION, sfb_nrg_act);
+
+ ixheaacd_aac_ec_interpolate(
+ &ptr_spec_coeff[window * (num_samples / 8)], &ptr_spec_scale[window],
+ &pstr_ec_state->q_spec_coeff[window], &ptr_spec_scale[window], sfb_nrg_prev,
+ sfb_nrg_act, total_scale_factor_bands, ptr_sfb_offset);
+ }
+ } else {
+ WORD32 total_scale_factor_bands = pstr_samp_rate_info->num_sfb_1024 - 1;
+ const WORD16 *ptr_sfb_offset = pstr_samp_rate_info->ptr_sfb_1024;
+ WORD16 spec_scale_out;
+
+ ixheaacd_aac_ec_calc_sfb_nrg(&ptr_spec_coeff[num_samples - (num_samples / 8)],
+ pstr_samp_rate_info, EIGHT_SHORT_SEQUENCE,
+ TRANS_SHORT_LONG, sfb_nrg_act);
+
+ ixheaacd_aac_ec_calc_sfb_nrg(pstr_ec_state->spectral_coeff, pstr_samp_rate_info,
+ ONLY_LONG_SEQUENCE, NO_TRANSITION, sfb_nrg_prev);
+
+ pstr_ics_info->window_shape = 0;
+ pstr_ics_info->window_sequence = LONG_STOP_SEQUENCE;
+
+ for (idx = 0; idx < num_samples; idx++) {
+ ptr_spec_coeff[idx] = pstr_ec_state->spectral_coeff[idx];
+ }
+
+ for (idx = 0; idx < 8; idx++) {
+ if (ptr_spec_scale[idx] > ptr_spec_scale[0]) {
+ ptr_spec_scale[0] = ptr_spec_scale[idx];
+ }
+ }
+
+ ixheaacd_aac_ec_interpolate(ptr_spec_coeff, &pstr_ec_state->q_spec_coeff[0],
+ &ptr_spec_scale[0], &spec_scale_out, sfb_nrg_prev,
+ sfb_nrg_act, total_scale_factor_bands, ptr_sfb_offset);
+
+ ptr_spec_scale[0] = spec_scale_out;
+ }
+ } else {
+ WORD32 total_scale_factor_bands = pstr_samp_rate_info->num_sfb_1024 - 1;
+ const WORD16 *ptr_sfb_offset = pstr_samp_rate_info->ptr_sfb_1024;
+ WORD16 spec_scale_act = pstr_ec_state->q_spec_coeff[0];
+
+ ixheaacd_aac_ec_calc_sfb_nrg(ptr_spec_coeff, pstr_samp_rate_info, ONLY_LONG_SEQUENCE,
+ NO_TRANSITION, sfb_nrg_prev);
+
+ if (pstr_ec_state->win_seq == EIGHT_SHORT_SEQUENCE) {
+ pstr_ics_info->window_shape = 1;
+ pstr_ics_info->window_sequence = LONG_START_SEQUENCE;
+
+ for (idx = 1; idx < 8; idx++) {
+ if (pstr_ec_state->q_spec_coeff[idx] > spec_scale_act) {
+ spec_scale_act = pstr_ec_state->q_spec_coeff[idx];
+ }
+ }
+
+ ixheaacd_aac_ec_calc_sfb_nrg(pstr_ec_state->spectral_coeff, pstr_samp_rate_info,
+ EIGHT_SHORT_SEQUENCE, TRANS_SHORT_LONG, sfb_nrg_act);
+ } else {
+ pstr_ics_info->window_shape = 0;
+ pstr_ics_info->window_sequence = ONLY_LONG_SEQUENCE;
+
+ ixheaacd_aac_ec_calc_sfb_nrg(pstr_ec_state->spectral_coeff, pstr_samp_rate_info,
+ ONLY_LONG_SEQUENCE, NO_TRANSITION, sfb_nrg_act);
+ }
+
+ ixheaacd_aac_ec_interpolate(ptr_spec_coeff, &ptr_spec_scale[0], &spec_scale_act,
+ &ptr_spec_scale[0], sfb_nrg_prev, sfb_nrg_act,
+ total_scale_factor_bands, ptr_sfb_offset);
+ }
+ }
+
+ ixheaacd_aac_ec_flip_spec_sign(ptr_spec_coeff, num_samples);
+ }
+
+ if (FRAME_MUTE == pstr_ec_state->conceal_state) {
+ pstr_ics_info->window_shape = pstr_ec_state->win_shape;
+ pstr_ics_info->window_sequence = ixheaacd_aac_ec_get_win_seq(pstr_ec_state->win_seq);
+ pstr_ec_state->win_seq = pstr_ics_info->window_sequence;
+ memset(ptr_spec_coeff, 0, num_samples * sizeof(ptr_spec_coeff[0]));
+ }
+}
+
+VOID ixheaacd_aac_ec_init(ia_ec_state_str *pstr_ec_state) {
+ pstr_ec_state->win_shape = CONCEAL_NOT_DEFINED;
+ pstr_ec_state->win_seq = ONLY_LONG_SEQUENCE;
+ pstr_ec_state->prev_win_group_len = 1;
+
+ pstr_ec_state->conceal_state = FRAME_OKAY;
+
+ memset(pstr_ec_state->spectral_coeff, 0, sizeof(pstr_ec_state->spectral_coeff));
+ memset(pstr_ec_state->q_spec_coeff, 0, sizeof(pstr_ec_state->q_spec_coeff));
+
+ pstr_ec_state->prev_frame_ok[0] = 1;
+ pstr_ec_state->prev_frame_ok[1] = 1;
+ pstr_ec_state->fade_idx = 0;
+}
+
+VOID ixheaacd_aac_apply_ec(ia_ec_state_str *pstr_ec_state,
+ ia_aac_dec_channel_info_struct *pstr_aac_dec_channel_info,
+ const ia_usac_samp_rate_info *pstr_samp_rate_info,
+ const WORD32 num_samples, ia_ics_info_struct *pstr_ics_info,
+ const WORD32 frame_status) {
+ if (pstr_ec_state->win_shape == CONCEAL_NOT_DEFINED) {
+ pstr_ec_state->win_shape = (UWORD8)pstr_ics_info->window_shape;
+ }
+
+ if (frame_status && pstr_ec_state->prev_frame_ok[1]) {
+ ixheaacd_aac_ec_store(pstr_ec_state, pstr_aac_dec_channel_info, pstr_ics_info);
+ }
+
+ ixheaacd_aac_ec_state(pstr_ec_state, frame_status);
+
+ ixheaacd_aac_ec_interpolate_frame(pstr_ec_state, pstr_aac_dec_channel_info, pstr_samp_rate_info,
+ num_samples, frame_status, pstr_ics_info);
+
+ pstr_ec_state->prev_frame_ok[0] = pstr_ec_state->prev_frame_ok[1];
+ pstr_ec_state->prev_frame_ok[1] = frame_status;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-16 22:15:29 +0000