/****************************************************************************** * * * 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 "ixheaacd_sbr_common.h" #include #include "ixheaacd_constants.h" #include #include #include #include "ixheaacd_basic_ops.h" #include "ixheaacd_bitbuffer.h" #include #include "ixheaacd_intrinsics.h" #include "ixheaacd_defines.h" #include #include "ixheaacd_definitions.h" #include "ixheaacd_error_codes.h" #include "ixheaacd_pulsedata.h" #include "ixheaacd_pns.h" #include "ixheaacd_drc_data_struct.h" #include "ixheaacd_lt_predict.h" #include "ixheaacd_channelinfo.h" #include "ixheaacd_cnst.h" #include "ixheaacd_drc_dec.h" #include "ixheaacd_sbrdecoder.h" #include "ixheaacd_block.h" #include "ixheaacd_channel.h" #include "ixheaacd_sbr_payload.h" #include "ixheaacd_common_rom.h" #include #include "ixheaacd_sbrdecsettings.h" #include "ixheaacd_sbr_scale.h" #include "ixheaacd_env_extr_part.h" #include #include "ixheaacd_lpp_tran.h" #include "ixheaacd_hybrid.h" #include "ixheaacd_ps_dec.h" #include "ixheaacd_env_extr.h" #include "ixheaacd_adts.h" #include "ixheaacd_audioobjtypes.h" #include "ixheaacd_memory_standards.h" #include "ixheaacd_latmdemux.h" #include "ixheaacd_aacdec.h" #include "ixheaacd_mps_polyphase.h" #include "ixheaacd_config.h" #include "ixheaacd_mps_dec.h" #include "ixheaacd_struct_def.h" #include "ixheaacd_tns.h" #include "ixheaacd_aac_imdct.h" #include "ixheaacd_multichannel.h" #include "ixheaacd_function_selector.h" static PLATFORM_INLINE WORD32 ixheaacd_shr32_drc(WORD32 a, WORD32 b) { WORD32 out_val; b = ((UWORD32)(b << 24) >> 24); if (b >= 31) { if (a < 0) out_val = -1; else out_val = 0; } else { a += (1 << (b - 1)); out_val = (WORD32)a >> b; } return out_val; } static PLATFORM_INLINE WORD32 ixheaacd_mult32x16in32_drc(WORD32 a, WORD16 b) { WORD32 result; WORD64 temp_result; temp_result = (WORD64)a * (WORD64)b; if (temp_result < (WORD64)MIN_32) result = MIN_32; else if (temp_result > (WORD64)MAX_32) result = MAX_32; else result = (WORD32)(temp_result); return (result); } VOID ixheaacd_process_win_seq(WORD32 *coef, WORD32 *prev, WORD16 *out, const WORD16 *window_long, const WORD16 *window_short, WORD16 q_shift, WORD16 ch_fac, WORD16 flag) { WORD32 i, accu; WORD32 *coef_1; const WORD16 *temp_win_sh, *temp_win_long; WORD16 *out1, *out2; WORD32 *temp_prev; if (flag == 1) { for (i = 0; i < SIZE07; i++) { WORD32 temp1 = ixheaacd_shl32_dir_sat_limit( ixheaacd_mult32x16in32(coef[SIZE08 + i], window_long[2 * i]), (q_shift + 1)); accu = ixheaacd_add32_sat(temp1, ((WORD32)prev[i] << 16)); out[ch_fac * i] = ixheaacd_round16(accu << 1); accu = ixheaacd_shl32_dir_sat_limit( ixheaacd_mult32x16in32(-(coef[SIZE15 - 1 - i]), window_long[2 * (SIZE07 - i) - 1]), q_shift); out[ch_fac * (i + SIZE09)] = ixheaacd_round16(accu << 2); } temp_win_sh = &(window_short[0]); coef_1 = &(coef[SIZE15]); temp_win_long = &(window_long[SIZE14]); temp_prev = &(prev[SIZE08 - 1]); out1 = &(out[ch_fac * (SIZE07)]); out2 = &(out[ch_fac * (SIZE09 - 1)]); } else { for (i = 0; i < SIZE07; i++) { accu = ixheaacd_mult32x16in32_drc( prev[SIZE08 - 1 - i], ixheaacd_negate16(window_long[2 * i + 1])); out[ch_fac * i] = ixheaacd_round16(accu << 2); accu = (ixheaacd_shl32_dir_sat_limit(-(coef[SIZE15 - 1 - i]), (q_shift - 1)) - ixheaacd_mult32x16in32_drc(prev[i + SIZE01], window_long[2 * SIZE07 - 2 - 2 * i])); out[ch_fac * (SIZE09 + i)] = ixheaacd_round16(accu << 2); } temp_win_sh = &(window_long[SIZE14]); coef_1 = &(coef[SIZE15]); temp_win_long = &(window_short[0]); temp_prev = &(prev[SIZE01 - 1]); out1 = &(out[ch_fac * (SIZE07)]); out2 = &(out[ch_fac * (SIZE09 - 1)]); } for (i = SIZE01 - 1; i >= 0; i--) { WORD32 temp_coef = *coef_1++; WORD16 win1 = *temp_win_long++; WORD16 win2 = *temp_win_long++; WORD32 prev1 = *temp_prev--; WORD16 win4 = *temp_win_sh++; WORD16 win3 = *temp_win_sh++; accu = ixheaacd_shl32_dir_sat_limit(ixheaacd_mult32x16in32(temp_coef, win1), q_shift) - ixheaacd_mult32x16in32_drc(prev1, win3); *out1 = ixheaacd_round16(accu << 2); out1 += ch_fac; accu = ixheaacd_sub32_sat( ixheaacd_shl32_dir_sat_limit( ixheaacd_mult32x16in32(ixheaacd_negate32_sat(temp_coef), win2), q_shift), ixheaacd_mult32x16in32_drc(prev1, win4)); *out2 = ixheaacd_round16(accu << 2); out2 -= ch_fac; } } static PLATFORM_INLINE VOID ixheaacd_long_short_win_process( WORD32 *current, WORD32 *prev, WORD16 *out, const WORD16 *short_window, const WORD16 *long_window_prev, WORD16 q_shift, WORD16 ch_fac, WORD32 flag) { WORD i; WORD32 accu; WORD32 *current_tmp1 = &(current[(SIZE03 - 1)]); WORD32 *current_tmp2 = &(current[-SIZE01]); const WORD16 *short_ptr = &(short_window[SIZE02 - 1]); for (i = SIZE01 - 1; i >= 0; i--) { WORD32 tmp1_cur = *current_tmp1--; WORD32 tmp2_cur = *current_tmp2++; WORD16 short1 = *short_ptr--; WORD16 short2 = *short_ptr--; accu = (ixheaacd_shl32_dir_sat_limit( (ixheaacd_mult32x16in32(tmp1_cur, short2) - ixheaacd_mult32x16in32(tmp2_cur, short1)), q_shift) - ixheaacd_mult32x16in32_drc(prev[i], long_window_prev[0 - 2 - 2 * i])); out[ch_fac * (0 + i)] = ixheaacd_round16(accu << 2); if (flag) { accu = (ixheaacd_shl32_dir_sat_limit( (ixheaacd_mult32x16in32(-(tmp1_cur), short1) - ixheaacd_mult32x16in32(tmp2_cur, short2)), q_shift) - ixheaacd_mult32x16in32_drc( prev[SIZE02 - 1 - i], long_window_prev[-2 * SIZE02 + 2 * i])); out[ch_fac * (SIZE02 - 1 - i)] = ixheaacd_round16(accu << 2); } } } VOID ixheaacd_long_short_win_seq(WORD32 *current, WORD32 *prev, WORD16 *out, const WORD16 *short_window, const WORD16 *short_window_prev, const WORD16 *long_window_prev, WORD16 q_shift, WORD16 ch_fac) { WORD32 i, flag; WORD32 accu; for (i = 0; i < SIZE07; i++) { accu = ixheaacd_mult32x16in32_drc( prev[SIZE08 - 1 - i], ixheaacd_negate16(long_window_prev[2 * i + 1])); out[ch_fac * i] = ixheaacd_round16(accu << 2); } for (i = 0; i < SIZE01; i++) { accu = (ixheaacd_shl32_dir_sat_limit( ixheaacd_mult32x16in32(current[SIZE01 + i], short_window_prev[2 * i]), q_shift) - ixheaacd_mult32x16in32_drc(prev[SIZE01 - 1 - i], long_window_prev[2 * SIZE07 + 1 + 2 * i])); out[ch_fac * (SIZE07 + i)] = ixheaacd_round16(accu << 2); } for (i = 0; i < SIZE01; i++) { accu = (ixheaacd_shl32_dir_sat_limit( ixheaacd_mult32x16in32(-(current[SIZE02 - 1 - i]), short_window_prev[SIZE02 - 2 * i - 1]), q_shift) - ixheaacd_mult32x16in32_drc(prev[i], long_window_prev[SIZE16 - 2 - (2 * i)])); out[ch_fac * (SIZE08 + i)] = ixheaacd_round16(accu << 2); } flag = 1; for (i = 0; i < 4; i++) { WORD32 inc = i * SIZE02; if (i == 3) { flag = 0; } ixheaacd_long_short_win_process(¤t[SIZE01 + inc], &prev[SIZE01 + inc], &out[ch_fac * (SIZE09 + inc)], short_window, &long_window_prev[2 * (SIZE07 - inc)], q_shift, ch_fac, flag); } for (i = 0; i < SIZE01; i++) { accu = (ixheaacd_mult32x16in32(-(current[SIZE10 - 1 - i]), short_window[SIZE02 - 2 * i - 1]) - ixheaacd_mult32x16in32(current[SIZE06 + i], short_window[SIZE02 - 2 * i - 2])); prev[i] = ixheaacd_round16(ixheaacd_shl32_dir_sat_limit(accu, (q_shift + 1))); } } VOID ixheaacd_nolap1_32(WORD32 *coef, WORD32 *out, WORD16 q_shift, WORD16 ch_fac) { WORD32 i; for (i = 0; i < SIZE07; i++) { out[ch_fac * i] = ixheaacd_shr32_drc( ixheaacd_negate32_sat(coef[SIZE07 - 1 - i]), 16 - q_shift); } } VOID ixheaacd_neg_shift_spec_dec(WORD32 *coef, WORD16 *out, WORD16 q_shift, WORD16 ch_fac) { WORD32 i; for (i = 0; i < SIZE07; i++) { out[ch_fac * i] = ixheaacd_round16(ixheaacd_shl32_dir_sat_limit( ixheaacd_negate32_sat(coef[SIZE07 - 1 - i]), q_shift)); } } VOID ixheaacd_spec_to_overlapbuf_dec(WORD32 *ptr_overlap_buf, WORD32 *ptr_spec_coeff, WORD32 q_shift, WORD32 size) { WORD32 i; for (i = 0; i < size; i++) { ptr_overlap_buf[i] = ixheaacd_shr32_drc(ptr_spec_coeff[i], 16 - q_shift); } } VOID ixheaacd_overlap_buf_out_dec(WORD16 *out_samples, WORD32 *ptr_overlap_buf, WORD32 size, const WORD16 ch_fac) { WORD32 i; for (i = 0; i < size; i++) { out_samples[ch_fac * i] = ixheaacd_shl16_sat((WORD16)ptr_overlap_buf[i], 1); } } VOID ixheaacd_overlap_out_copy_dec(WORD16 *out_samples, WORD32 *ptr_overlap_buf, WORD32 *ptr_overlap_buf1, const WORD16 ch_fac) { WORD32 i; for (i = 0; i < SIZE01; i++) { out_samples[ch_fac * i] = ixheaacd_shl16_sat((WORD16)ptr_overlap_buf[i], 1); ptr_overlap_buf[i] = ptr_overlap_buf1[i]; } } VOID ixheaacd_imdct_process(ia_aac_dec_overlap_info *ptr_aac_dec_overlap_info, WORD32 *ptr_spec_coeff, ia_ics_info_struct *ptr_ics_info, WORD16 out_samples[], const WORD16 ch_fac, WORD32 *scratch, ia_aac_dec_tables_struct *ptr_aac_tables, WORD32 object_type) { WORD32 *ptr_overlap_buf; const WORD16 *ptr_long_window; const WORD16 *ptr_short_window; ptr_overlap_buf = ptr_aac_dec_overlap_info->ptr_overlap_buf; ptr_long_window = ptr_aac_dec_overlap_info ->ptr_long_window[(WORD32)ptr_aac_dec_overlap_info->window_shape]; ptr_short_window = ptr_aac_dec_overlap_info ->ptr_short_window[(WORD32)ptr_aac_dec_overlap_info->window_shape]; if (ptr_ics_info->window_sequence != EIGHT_SHORT_SEQUENCE) { WORD16 q_shift; WORD32 expo, imdct_scale; if ((512 == ptr_ics_info->frame_length) || (480 == ptr_ics_info->frame_length)) { if (512 == ptr_ics_info->frame_length) { WORD32 *ld_cos_sin_ptr = (WORD32 *)ptr_aac_tables->pstr_imdct_tables->cosine_array_1024; ixheaacd_inverse_transform_512( ptr_spec_coeff, scratch, &imdct_scale, ld_cos_sin_ptr, ptr_aac_tables->pstr_imdct_tables, object_type); } else { ixheaacd_mdct_480_ld(ptr_spec_coeff, scratch, &imdct_scale, 0, ptr_aac_tables->pstr_imdct_tables, object_type); } if (object_type == AOT_ER_AAC_ELD) { int i, N = (ptr_ics_info->frame_length << 1); for (i = 0; i < N / 2; i++) { ptr_spec_coeff[i] = -ptr_spec_coeff[i + N]; ptr_spec_coeff[i + N + N / 2] = -ptr_spec_coeff[i + N / 2]; } } } else { expo = (*ixheaacd_calc_max_spectral_line)(ptr_spec_coeff, 1024) - 1; expo = 8 - expo; imdct_scale = ixheaacd_inverse_transform( ptr_spec_coeff, scratch, ptr_aac_tables->pstr_imdct_tables, expo, 1024); } q_shift = (31 + imdct_scale) + (-1 - 16 - 9); switch (ptr_ics_info->window_sequence) { case ONLY_LONG_SEQUENCE: switch (ptr_aac_dec_overlap_info->window_sequence) { case ONLY_LONG_SEQUENCE: case LONG_STOP_SEQUENCE: if (1024 == ptr_ics_info->frame_length) { ia_ics_info_struct *tmp_ptr_ics_info = ptr_ics_info; (*ixheaacd_post_twid_overlap_add)( out_samples, ptr_spec_coeff, ptr_aac_tables->pstr_imdct_tables, 1024, ptr_overlap_buf, q_shift, ptr_long_window, ch_fac); ptr_ics_info = tmp_ptr_ics_info; } if ((512 == ptr_ics_info->frame_length) || (480 == ptr_ics_info->frame_length)) { if (object_type != AOT_ER_AAC_ELD) { if (512 == ptr_ics_info->frame_length) { ixheaacd_lap1_512_480(ptr_spec_coeff, ptr_overlap_buf, out_samples, ptr_long_window, q_shift, SIZE04, ch_fac); ixheaacd_spec_to_overlapbuf(ptr_overlap_buf, ptr_spec_coeff, q_shift, SIZE04); } else if (480 == ptr_ics_info->frame_length) { ixheaacd_lap1_512_480(ptr_spec_coeff, ptr_overlap_buf, out_samples, ptr_long_window, q_shift, 240, ch_fac); ixheaacd_spec_to_overlapbuf(ptr_overlap_buf, ptr_spec_coeff, q_shift, 240); } } else { ixheaacd_eld_dec_windowing( ptr_spec_coeff, ptr_long_window, ptr_ics_info->frame_length, q_shift, ptr_overlap_buf, ch_fac, out_samples); } } break; case LONG_START_SEQUENCE: case EIGHT_SHORT_SEQUENCE: if (1024 == ptr_ics_info->frame_length) { (*ixheaacd_post_twiddle)(scratch, ptr_spec_coeff, ptr_aac_tables->pstr_imdct_tables, 1024); } ixheaacd_process_win_seq(scratch, ptr_overlap_buf, out_samples, ptr_long_window, ptr_short_window, q_shift, ch_fac, 1); if (512 == ptr_ics_info->frame_length) { ixheaacd_spec_to_overlapbuf(ptr_overlap_buf, ptr_spec_coeff, q_shift, SIZE04); } else if (480 == ptr_ics_info->frame_length) { ixheaacd_spec_to_overlapbuf(ptr_overlap_buf, ptr_spec_coeff, q_shift, 240); } else { (*ixheaacd_spec_to_overlapbuf)(ptr_overlap_buf, scratch, q_shift, SIZE08); } break; } break; case LONG_START_SEQUENCE: if (1024 == ptr_ics_info->frame_length) { (*ixheaacd_post_twiddle)(scratch, ptr_spec_coeff, ptr_aac_tables->pstr_imdct_tables, 1024); } switch (ptr_aac_dec_overlap_info->window_sequence) { case ONLY_LONG_SEQUENCE: case LONG_STOP_SEQUENCE: (*ixheaacd_over_lap_add1)(scratch, ptr_overlap_buf, out_samples, ptr_long_window, q_shift, SIZE08, ch_fac); break; case LONG_START_SEQUENCE: case EIGHT_SHORT_SEQUENCE: ixheaacd_process_win_seq(scratch, ptr_overlap_buf, out_samples, ptr_long_window, ptr_short_window, q_shift, ch_fac, 1); break; } ixheaacd_nolap1_32(&scratch[SIZE01], ptr_overlap_buf, q_shift, 1); (*ixheaacd_spec_to_overlapbuf)(&ptr_overlap_buf[SIZE07], scratch, q_shift, SIZE01); break; case LONG_STOP_SEQUENCE: if (1024 == ptr_ics_info->frame_length) { (*ixheaacd_post_twiddle)(scratch, ptr_spec_coeff, ptr_aac_tables->pstr_imdct_tables, 1024); } switch (ptr_aac_dec_overlap_info->window_sequence) { case EIGHT_SHORT_SEQUENCE: case LONG_START_SEQUENCE: (*ixheaacd_overlap_buf_out)(out_samples, ptr_overlap_buf, SIZE07, ch_fac); (*ixheaacd_over_lap_add1)( &scratch[SIZE14], &ptr_overlap_buf[SIZE07], &out_samples[ch_fac * (SIZE07)], ptr_short_window, q_shift, SIZE01, ch_fac); { WORD16 q_shift1 = q_shift + 1; (*ixheaacd_neg_shift_spec)(&scratch[SIZE08], &out_samples[ch_fac * SIZE09], q_shift1, ch_fac); } break; case ONLY_LONG_SEQUENCE: case LONG_STOP_SEQUENCE: ixheaacd_process_win_seq(scratch, ptr_overlap_buf, out_samples, ptr_long_window, ptr_short_window, q_shift, ch_fac, 0); break; } (*ixheaacd_spec_to_overlapbuf)(ptr_overlap_buf, scratch, q_shift, SIZE08); break; } } else { WORD16 q_shift, max_scale; WORD32 imdct_scale[8], i; const WORD16 *short_window; short_window = ptr_aac_dec_overlap_info ->ptr_short_window[(WORD32)ptr_ics_info->window_shape]; { WORD32 expo; expo = (*ixheaacd_calc_max_spectral_line)(ptr_spec_coeff, 1024) - 1; expo = 5 - expo; for (i = 0; i < MAX_WINDOWS; i++) { imdct_scale[i] = ixheaacd_inverse_transform( &ptr_spec_coeff[i * SIZE02], &scratch[i * SIZE02], ptr_aac_tables->pstr_imdct_tables, expo, 128); (*ixheaacd_post_twiddle)(&scratch[i * SIZE02], &ptr_spec_coeff[i * SIZE02], ptr_aac_tables->pstr_imdct_tables, 128); } } max_scale = 31 + imdct_scale[0]; q_shift = max_scale + (-16 - 6 - 1); switch (ptr_aac_dec_overlap_info->window_sequence) { WORD32 overlap_buf_loc[SIZE01]; case EIGHT_SHORT_SEQUENCE: case LONG_START_SEQUENCE: (*ixheaacd_overlap_buf_out)(out_samples, ptr_overlap_buf, SIZE07, ch_fac); (*ixheaacd_over_lap_add1)(&scratch[0], &ptr_overlap_buf[SIZE07], &out_samples[ch_fac * SIZE07], ptr_short_window, q_shift, SIZE01, ch_fac); for (i = 0; i < 3; i++) { WORD32 inc = (i * SIZE02); (*ixheaacd_spec_to_overlapbuf)(overlap_buf_loc, &scratch[inc], q_shift, SIZE01); (*ixheaacd_over_lap_add1)(&scratch[SIZE02 + inc], overlap_buf_loc, &out_samples[ch_fac * (SIZE09 + inc)], short_window, q_shift, SIZE01, ch_fac); } (*ixheaacd_over_lap_add2)(&scratch[SIZE08], &scratch[SIZE06], ptr_overlap_buf, short_window, q_shift, SIZE01, 1); (*ixheaacd_overlap_out_copy)(&out_samples[ch_fac * SIZE15], ptr_overlap_buf, &ptr_overlap_buf[SIZE01], ch_fac); break; case ONLY_LONG_SEQUENCE: case LONG_STOP_SEQUENCE: ixheaacd_long_short_win_seq(scratch, ptr_overlap_buf, out_samples, short_window, ptr_short_window, ptr_long_window, q_shift, ch_fac); break; } for (i = 0; i < 3; i++) { WORD32 inc = (i * SIZE02); (*ixheaacd_over_lap_add2)(&scratch[SIZE10 + inc], &scratch[SIZE08 + inc], &ptr_overlap_buf[SIZE01 + inc], short_window, q_shift, SIZE01, 1); } (*ixheaacd_spec_to_overlapbuf)(&ptr_overlap_buf[SIZE07], &scratch[SIZE14], q_shift, SIZE01); } ptr_aac_dec_overlap_info->window_shape = ptr_ics_info->window_shape; ptr_aac_dec_overlap_info->window_sequence = ptr_ics_info->window_sequence; } void ixheaacd_eld_dec_windowing(WORD32 *ptr_spect_coeff, const WORD16 *p_win, WORD32 framesize, WORD16 q_shift, WORD32 *p_overlap_buffer, const WORD16 stride, WORD16 *out_samples) { int i = 0; int loop_size; WORD32 *ptr_z = ptr_spect_coeff; WORD32 *ptr_out, *p_out2; WORD32 *p_overlap_buffer32 = (WORD32 *)p_overlap_buffer; WORD32 delay = framesize >> 2; ptr_z = ptr_spect_coeff + delay; p_win += delay; ptr_out = p_overlap_buffer32; q_shift = q_shift + 2; if (q_shift >= 0) { for (i = (delay)-1; i >= 0; i--) { WORD32 win_op; WORD32 win_ovadd_op; WORD16 win_val; win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); win_ovadd_op = ixheaacd_add32(ixheaacd_shl32(win_op, q_shift), *ptr_out++); *out_samples = ixheaacd_round16(ixheaacd_shl32_sat(win_ovadd_op, 1)); out_samples += stride; win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); win_ovadd_op = ixheaacd_add32(ixheaacd_shl32(win_op, q_shift), *ptr_out++); *out_samples = ixheaacd_round16(ixheaacd_shl32_sat(win_ovadd_op, 1)); out_samples += stride; win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); win_ovadd_op = ixheaacd_add32(ixheaacd_shl32(win_op, q_shift), *ptr_out++); *out_samples = ixheaacd_round16(ixheaacd_shl32_sat(win_ovadd_op, 1)); out_samples += stride; win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); win_ovadd_op = ixheaacd_add32(ixheaacd_shl32(win_op, q_shift), *ptr_out++); *out_samples = ixheaacd_round16(ixheaacd_shl32_sat(win_ovadd_op, 1)); out_samples += stride; } p_out2 = p_overlap_buffer32; loop_size = (((framesize * 3) - framesize) >> 2) - 1; for (i = loop_size; i >= 0; i--) { WORD32 win_op; WORD16 win_val; win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_add32(ixheaacd_shl32(win_op, q_shift), *ptr_out++); win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_add32(ixheaacd_shl32(win_op, q_shift), *ptr_out++); win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_add32(ixheaacd_shl32(win_op, q_shift), *ptr_out++); win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_add32(ixheaacd_shl32(win_op, q_shift), *ptr_out++); } loop_size = ((((framesize << 2) - delay) - (framesize * 3)) >> 2) - 1; for (i = loop_size; i >= 0; i--) { WORD32 win_op; WORD16 win_val; win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_shl32(win_op, q_shift); win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_shl32(win_op, q_shift); win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_shl32(win_op, q_shift); win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_shl32(win_op, q_shift); } } else { q_shift = -q_shift; for (i = (delay)-1; i >= 0; i--) { WORD32 win_op; WORD32 win_ovadd_op; WORD16 win_val; win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); win_ovadd_op = ixheaacd_add32(ixheaacd_shr32(win_op, q_shift), *ptr_out++); *out_samples = ixheaacd_round16(ixheaacd_shl32(win_ovadd_op, 1)); out_samples += stride; win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); win_ovadd_op = ixheaacd_add32(ixheaacd_shr32(win_op, q_shift), *ptr_out++); *out_samples = ixheaacd_round16(ixheaacd_shl32(win_ovadd_op, 1)); out_samples += stride; win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); win_ovadd_op = ixheaacd_add32(ixheaacd_shr32(win_op, q_shift), *ptr_out++); *out_samples = ixheaacd_round16(ixheaacd_shl32(win_ovadd_op, 1)); out_samples += stride; win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); win_ovadd_op = ixheaacd_add32(ixheaacd_shr32(win_op, q_shift), *ptr_out++); *out_samples = ixheaacd_round16(ixheaacd_shl32(win_ovadd_op, 1)); out_samples += stride; } p_out2 = p_overlap_buffer32; loop_size = (((framesize * 3) - framesize) >> 2) - 1; for (i = loop_size; i >= 0; i--) { WORD32 win_op; WORD16 win_val; win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_add32(ixheaacd_shr32(win_op, q_shift), *ptr_out++); win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_add32(ixheaacd_shr32(win_op, q_shift), *ptr_out++); win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_add32(ixheaacd_shr32(win_op, q_shift), *ptr_out++); win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_add32(ixheaacd_shr32(win_op, q_shift), *ptr_out++); } loop_size = ((((framesize << 2) - delay) - (framesize * 3)) >> 2) - 1; for (i = loop_size; i >= 0; i--) { WORD32 win_op; WORD16 win_val; win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_shr32(win_op, q_shift); win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_shr32(win_op, q_shift); win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_shr32(win_op, q_shift); win_val = *p_win++; win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val)); *p_out2++ = ixheaacd_shr32(win_op, q_shift); } } }