| /****************************************************************************** |
| * * |
| * 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 <string.h> |
| #include <ixheaacd_type_def.h> |
| |
| #include "ixheaacd_constants.h" |
| |
| #include <ixheaacd_basic_ops32.h> |
| #include "ixheaacd_windows.h" |
| |
| static PLATFORM_INLINE WORD32 ixheaacd_mult32_sh1(WORD32 a, WORD32 b) { |
| WORD32 result; |
| WORD64 temp_result; |
| |
| temp_result = (WORD64)a * (WORD64)b; |
| result = (WORD32)(temp_result >> 31); |
| |
| return (result); |
| } |
| |
| VOID ixheaacd_memset(FLOAT32 *x, WORD32 n) { |
| memset(x, 0, n * sizeof(FLOAT32)); |
| return; |
| } |
| |
| VOID ixheaacd_mem_cpy(const FLOAT32 x[], FLOAT32 y[], WORD32 n) { |
| memcpy(y, x, n * sizeof(FLOAT32)); |
| return; |
| } |
| |
| VOID ixheaacd_vec_cnst_mul(FLOAT32 a, FLOAT32 x[], FLOAT32 z[], WORD32 n) { |
| WORD32 i; |
| for (i = 0; i < n; i++) { |
| z[i] = (FLOAT32)a * x[i]; |
| } |
| return; |
| } |
| |
| VOID ixheaacd_combine_fac(WORD32 *src1, WORD32 *src2, WORD32 *dest, WORD32 len, |
| WORD8 output_q, WORD8 fac_q) { |
| WORD32 i; |
| if (fac_q > output_q) { |
| for (i = 0; i < len; i++) { |
| *dest = ixheaacd_add32_sat(*src1, ((*src2) >> (fac_q - output_q))); |
| dest++; |
| src1++; |
| src2++; |
| } |
| } else { |
| for (i = 0; i < len; i++) { |
| *dest = ixheaacd_add32_sat(*src1, ((*src2) << (output_q - fac_q))); |
| dest++; |
| src1++; |
| src2++; |
| } |
| } |
| } |
| |
| WORD8 ixheaacd_windowing_long1(WORD32 *src1, WORD32 *src2, |
| const WORD32 *win_fwd, const WORD32 *win_rev, |
| WORD32 *dest, WORD32 vlen, WORD8 shift1, |
| WORD8 shift2) { |
| WORD32 i; |
| WORD32 *rsrc2 = src2 + vlen - 1; |
| |
| if (shift1 > shift2) { |
| for (i = 0; i < vlen / 2; i++) { |
| *dest = ixheaacd_add32_sat( |
| ((ixheaacd_mult32_sh1(*src1, *win_fwd)) >> (shift1 - shift2)), |
| ixheaacd_mult32_sh1(*src2, *win_rev)); |
| *(dest + (vlen - (2 * i)) - 1) = ixheaacd_add32_sat( |
| ((ixheaacd_mult32_sh1(-(*src1), *win_rev)) >> (shift1 - shift2)), |
| ixheaacd_mult32_sh1(*rsrc2, *win_fwd)); |
| |
| src1++; |
| src2++; |
| win_fwd++; |
| win_rev--; |
| rsrc2--; |
| dest++; |
| } |
| return (shift2); |
| } else { |
| for (i = 0; i < vlen / 2; i++) { |
| *dest = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(*src1, *win_fwd), |
| ((ixheaacd_mult32_sh1(*src2, *win_rev)) >> (shift2 - shift1))); |
| |
| *(dest + (vlen - (2 * i)) - 1) = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(-(*src1), *win_rev), |
| ((ixheaacd_mult32_sh1(*rsrc2, *win_fwd)) >> (shift2 - shift1))); |
| src1++; |
| src2++; |
| win_fwd++; |
| win_rev--; |
| rsrc2--; |
| dest++; |
| } |
| return (shift1); |
| } |
| } |
| |
| WORD8 ixheaacd_windowing_long2(WORD32 *src1, const WORD32 *win_fwd, |
| WORD32 *fac_data_out, WORD32 *over_lap, |
| WORD32 *p_out_buffer, |
| offset_lengths *ixheaacd_drc_offset, |
| WORD8 shiftp, WORD8 shift_olap, WORD8 fac_q) { |
| WORD32 i; |
| WORD32 *dest = p_out_buffer; |
| |
| win_fwd += ixheaacd_drc_offset->lfac; |
| |
| if (shiftp > fac_q) { |
| if (shift_olap > fac_q) { |
| for (i = 0; |
| i < ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->lfac; |
| i++) { |
| dest[i] = over_lap[i] >> (shift_olap - fac_q); |
| } |
| |
| for (i = ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->lfac; |
| i < ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->n_trans_ls; |
| i++) { |
| dest[i] = ixheaacd_add32_sat( |
| (ixheaacd_mult32_sh1(-src1[ixheaacd_drc_offset->n_long / 2 + |
| ixheaacd_drc_offset->n_flat_ls + |
| ixheaacd_drc_offset->lfac - i - 1], |
| *win_fwd) >> |
| (shiftp - fac_q)), |
| (*fac_data_out)); |
| win_fwd++; |
| fac_data_out++; |
| } |
| |
| for (; |
| i < ixheaacd_drc_offset->n_flat_ls + (ixheaacd_drc_offset->lfac * 3); |
| i++) { |
| dest[i] = |
| ixheaacd_add32_sat((-src1[ixheaacd_drc_offset->n_long / 2 + |
| ixheaacd_drc_offset->n_flat_ls + |
| ixheaacd_drc_offset->lfac - i - 1] >> |
| (shiftp - fac_q)), |
| (*fac_data_out)); |
| fac_data_out++; |
| } |
| |
| for (; i < ixheaacd_drc_offset->n_long; i++) { |
| dest[i] = -src1[ixheaacd_drc_offset->n_long / 2 + |
| ixheaacd_drc_offset->n_flat_ls + |
| ixheaacd_drc_offset->lfac - i - 1] >> |
| (shiftp - fac_q); |
| } |
| return (fac_q); |
| } else { |
| memcpy(dest, over_lap, sizeof(WORD32) * (ixheaacd_drc_offset->n_flat_ls + |
| ixheaacd_drc_offset->lfac)); |
| |
| for (i = ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->lfac; |
| i < ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->n_trans_ls; |
| i++) { |
| dest[i] = ixheaacd_add32_sat( |
| (ixheaacd_mult32_sh1(-src1[ixheaacd_drc_offset->n_long / 2 + |
| ixheaacd_drc_offset->n_flat_ls + |
| ixheaacd_drc_offset->lfac - i - 1], |
| *win_fwd) >> |
| (shiftp - shift_olap)), |
| (*fac_data_out) >> (fac_q - shift_olap)); |
| win_fwd++; |
| fac_data_out++; |
| } |
| |
| for (; |
| i < ixheaacd_drc_offset->n_flat_ls + (ixheaacd_drc_offset->lfac * 3); |
| i++) { |
| dest[i] = |
| ixheaacd_add32_sat((-src1[ixheaacd_drc_offset->n_long / 2 + |
| ixheaacd_drc_offset->n_flat_ls + |
| ixheaacd_drc_offset->lfac - i - 1] >> |
| (shiftp - shift_olap)), |
| (*fac_data_out) >> (fac_q - shift_olap)); |
| fac_data_out++; |
| } |
| |
| for (; i < ixheaacd_drc_offset->n_long; i++) { |
| dest[i] = -src1[ixheaacd_drc_offset->n_long / 2 + |
| ixheaacd_drc_offset->n_flat_ls + |
| ixheaacd_drc_offset->lfac - i - 1] >> |
| (shiftp - shift_olap); |
| } |
| return (shift_olap); |
| } |
| } else { |
| if (shift_olap > shiftp) { |
| for (i = 0; |
| i < ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->lfac; |
| i++) { |
| dest[i] = over_lap[i] >> (shift_olap - shiftp); |
| } |
| |
| for (i = ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->lfac; |
| i < ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->n_trans_ls; |
| i++) { |
| dest[i] = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(-src1[ixheaacd_drc_offset->n_long / 2 + |
| ixheaacd_drc_offset->n_flat_ls + |
| ixheaacd_drc_offset->lfac - i - 1], |
| *win_fwd), |
| (*fac_data_out) >> (fac_q - shiftp)); |
| win_fwd++; |
| fac_data_out++; |
| } |
| |
| for (; |
| i < ixheaacd_drc_offset->n_flat_ls + (ixheaacd_drc_offset->lfac * 3); |
| i++) { |
| dest[i] = ixheaacd_add32_sat(-src1[ixheaacd_drc_offset->n_long / 2 + |
| ixheaacd_drc_offset->n_flat_ls + |
| ixheaacd_drc_offset->lfac - i - 1], |
| (*fac_data_out) >> (fac_q - shiftp)); |
| fac_data_out++; |
| } |
| |
| for (; i < ixheaacd_drc_offset->n_long; i++) { |
| dest[i] = -src1[ixheaacd_drc_offset->n_long / 2 + |
| ixheaacd_drc_offset->n_flat_ls + |
| ixheaacd_drc_offset->lfac - i - 1]; |
| } |
| return (shiftp); |
| } else { |
| memcpy(dest, over_lap, sizeof(WORD32) * (ixheaacd_drc_offset->n_flat_ls + |
| ixheaacd_drc_offset->lfac)); |
| |
| for (i = ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->lfac; |
| i < ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->n_trans_ls; |
| i++) { |
| dest[i] = ixheaacd_add32_sat( |
| (ixheaacd_mult32_sh1(-src1[ixheaacd_drc_offset->n_long / 2 + |
| ixheaacd_drc_offset->n_flat_ls + |
| ixheaacd_drc_offset->lfac - i - 1], |
| *win_fwd) >> |
| (shiftp - shift_olap)), |
| (*fac_data_out) >> (fac_q - shift_olap)); |
| win_fwd++; |
| fac_data_out++; |
| } |
| |
| for (; |
| i < ixheaacd_drc_offset->n_flat_ls + (ixheaacd_drc_offset->lfac * 3); |
| i++) { |
| dest[i] = |
| ixheaacd_add32_sat((-src1[ixheaacd_drc_offset->n_long / 2 + |
| ixheaacd_drc_offset->n_flat_ls + |
| ixheaacd_drc_offset->lfac - i - 1] >> |
| (shiftp - shift_olap)), |
| (*fac_data_out) >> (fac_q - shift_olap)); |
| fac_data_out++; |
| } |
| |
| for (; i < ixheaacd_drc_offset->n_long; i++) { |
| dest[i] = -src1[ixheaacd_drc_offset->n_long / 2 + |
| ixheaacd_drc_offset->n_flat_ls + |
| ixheaacd_drc_offset->lfac - i - 1] >> |
| (shiftp - shift_olap); |
| } |
| return (shift_olap); |
| } |
| } |
| } |
| |
| WORD8 ixheaacd_windowing_long3(WORD32 *src1, const WORD32 *win_fwd, |
| WORD32 *over_lap, WORD32 *p_out_buffer, |
| const WORD32 *win_rev, |
| offset_lengths *ixheaacd_drc_offset, |
| WORD8 shiftp, WORD8 shift_olap) { |
| WORD32 i; |
| WORD32 *dest = p_out_buffer; |
| |
| if (shiftp > shift_olap) { |
| memcpy(dest, over_lap, sizeof(FLOAT32) * ixheaacd_drc_offset->n_flat_ls); |
| |
| for (i = ixheaacd_drc_offset->n_flat_ls; |
| i < ixheaacd_drc_offset->n_long / 2; i++) { |
| dest[i] = ixheaacd_add32_sat( |
| (ixheaacd_mult32_sh1(src1[i], *win_fwd) >> (shiftp - shift_olap)), |
| ixheaacd_mult32_sh1(over_lap[i], *win_rev)); |
| win_fwd++; |
| win_rev--; |
| } |
| |
| for (i = ixheaacd_drc_offset->n_long / 2; |
| i < ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->n_trans_ls; |
| i++) { |
| dest[i] = ixheaacd_add32_sat( |
| (ixheaacd_mult32_sh1(-src1[ixheaacd_drc_offset->n_long - i - 1], |
| *win_fwd) >> |
| (shiftp - shift_olap)), |
| ixheaacd_mult32_sh1(over_lap[i], *win_rev)); |
| win_fwd++; |
| win_rev--; |
| } |
| |
| for (; i < ixheaacd_drc_offset->n_long; i++) { |
| dest[i] = |
| -src1[ixheaacd_drc_offset->n_long - i - 1] >> (shiftp - shift_olap); |
| } |
| |
| return (shift_olap); |
| } else { |
| for (i = 0; i < ixheaacd_drc_offset->n_flat_ls; i++) { |
| dest[i] = over_lap[i] >> (shift_olap - shiftp); |
| } |
| |
| for (i = ixheaacd_drc_offset->n_flat_ls; |
| i < ixheaacd_drc_offset->n_long / 2; i++) { |
| dest[i] = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(src1[i], *win_fwd), |
| ixheaacd_mult32_sh1(over_lap[i], *win_rev) >> (shift_olap - shiftp)); |
| win_fwd++; |
| win_rev--; |
| } |
| |
| for (i = ixheaacd_drc_offset->n_long / 2; |
| i < ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->n_trans_ls; |
| i++) { |
| dest[i] = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(-src1[ixheaacd_drc_offset->n_long - i - 1], |
| *win_fwd), |
| ixheaacd_mult32_sh1(over_lap[i], *win_rev) >> (shift_olap - shiftp)); |
| win_fwd++; |
| win_rev--; |
| } |
| |
| for (; i < ixheaacd_drc_offset->n_long; i++) { |
| dest[i] = -src1[ixheaacd_drc_offset->n_long - i - 1]; |
| } |
| |
| return (shiftp); |
| } |
| } |
| |
| VOID ixheaacd_windowing_short1(WORD32 *src1, WORD32 *src2, WORD32 *fp, |
| offset_lengths *ixheaacd_drc_offset, |
| WORD8 shiftp, WORD8 shift_olap) { |
| WORD32 i; |
| WORD32 *dest = fp; |
| |
| if (shift_olap > shiftp) { |
| if (ixheaacd_drc_offset->n_short > ixheaacd_drc_offset->lfac) { |
| for (i = 0; i < ixheaacd_drc_offset->lfac; i++) { |
| dest[i] = dest[i] >> (shift_olap - shiftp); |
| } |
| for (i = ixheaacd_drc_offset->lfac; i < ixheaacd_drc_offset->n_short; |
| i++) { |
| dest[i] = ixheaacd_mult32_sh1( |
| -src1[ixheaacd_drc_offset->n_short - i - 1], src2[i]); |
| } |
| |
| for (; i < ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->lfac; |
| i++) { |
| dest[i] = 0; |
| } |
| } else { |
| for (i = 0; i < ixheaacd_drc_offset->lfac; i++) { |
| dest[i] = dest[i] >> (shift_olap - shiftp); |
| } |
| for (i = ixheaacd_drc_offset->lfac; |
| i < ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->lfac; |
| i++) { |
| dest[i] = 0; |
| } |
| } |
| } else { |
| if (ixheaacd_drc_offset->n_short > ixheaacd_drc_offset->lfac) { |
| for (i = ixheaacd_drc_offset->lfac; i < ixheaacd_drc_offset->n_short; |
| i++) { |
| dest[i] = ixheaacd_mult32_sh1( |
| -src1[ixheaacd_drc_offset->n_short - i - 1], src2[i]) >> |
| (shiftp - shift_olap); |
| } |
| |
| for (; i < ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->lfac; |
| i++) { |
| dest[i] = 0; |
| } |
| } else { |
| for (i = ixheaacd_drc_offset->lfac; |
| i < ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->lfac; |
| i++) { |
| dest[i] = 0; |
| } |
| } |
| } |
| } |
| |
| VOID ixheaacd_windowing_short2(WORD32 *src1, WORD32 *win_fwd, WORD32 *fp, |
| offset_lengths *ixheaacd_drc_offset, |
| WORD8 shiftp, WORD8 shift_olap) { |
| WORD32 i; |
| |
| WORD32 *win_rev = win_fwd + ixheaacd_drc_offset->n_short - 1; |
| |
| if (shift_olap > shiftp) { |
| for (i = 0; i < ixheaacd_drc_offset->n_short / 2; i++) { |
| fp[i] = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(src1[i], *win_fwd), |
| (ixheaacd_mult32_sh1(fp[i], *win_rev) >> (shift_olap - shiftp))); |
| |
| fp[ixheaacd_drc_offset->n_short - i - 1] = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(-src1[i], *win_rev), |
| (ixheaacd_mult32_sh1(fp[ixheaacd_drc_offset->n_short - i - 1], |
| *win_fwd) >> |
| (shift_olap - shiftp))); |
| win_fwd++; |
| win_rev--; |
| } |
| |
| for (i = ixheaacd_drc_offset->n_short; |
| i < ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->n_short; |
| i++) { |
| fp[i] = 0; |
| } |
| } else { |
| for (i = 0; i < ixheaacd_drc_offset->n_short / 2; i++) { |
| fp[i] = ixheaacd_add32_sat( |
| (ixheaacd_mult32_sh1(src1[i], *win_fwd) >> (shiftp - shift_olap)), |
| ixheaacd_mult32_sh1(fp[i], *win_rev)); |
| |
| fp[ixheaacd_drc_offset->n_short - i - 1] = ixheaacd_add32_sat( |
| (ixheaacd_mult32_sh1(-src1[i], *win_rev) >> (shiftp - shift_olap)), |
| ixheaacd_mult32_sh1(fp[ixheaacd_drc_offset->n_short - i - 1], |
| *win_fwd)); |
| |
| win_fwd++; |
| win_rev--; |
| } |
| |
| for (i = ixheaacd_drc_offset->n_short; |
| i < ixheaacd_drc_offset->n_flat_ls + ixheaacd_drc_offset->n_short; |
| i++) { |
| fp[i] = 0; |
| } |
| } |
| } |
| |
| WORD8 ixheaacd_windowing_short3(WORD32 *src1, WORD32 *win_rev, WORD32 *fp, |
| WORD32 n_short, WORD8 shiftp, |
| WORD8 shift_olap) { |
| WORD32 i; |
| const WORD32 *win_fwd = win_rev - n_short + 1; |
| if (shift_olap > shiftp) { |
| for (i = 0; i < n_short / 2; i++) { |
| fp[i] = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(-src1[n_short / 2 - i - 1], *win_rev), |
| (fp[i] >> (shift_olap - shiftp))); |
| |
| fp[n_short - i - 1] = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(-src1[n_short / 2 - i - 1], *win_fwd), |
| (fp[n_short - i - 1] >> (shift_olap - shiftp))); |
| win_rev--; |
| win_fwd++; |
| } |
| return (shiftp); |
| } else { |
| for (i = 0; i < n_short / 2; i++) { |
| fp[i] = ixheaacd_add32_sat( |
| (ixheaacd_mult32_sh1(-src1[n_short / 2 - i - 1], *win_rev) >> |
| (shiftp - shift_olap)), |
| fp[i]); |
| |
| fp[n_short - i - 1] = ixheaacd_add32_sat( |
| (ixheaacd_mult32_sh1(-src1[n_short / 2 - i - 1], *win_fwd) >> |
| (shiftp - shift_olap)), |
| fp[n_short - i - 1]); |
| |
| win_rev--; |
| win_fwd++; |
| } |
| return (shift_olap); |
| } |
| } |
| |
| WORD8 ixheaacd_windowing_short4(WORD32 *src1, WORD32 *win_fwd, WORD32 *fp, |
| WORD32 *win_fwd1, WORD32 n_short, WORD32 flag, |
| WORD8 shiftp, WORD8 shift_olap, |
| WORD8 output_q) { |
| WORD32 i; |
| const WORD32 *win_rev = win_fwd + n_short - 1; |
| const WORD32 *win_rev1 = win_fwd1 - n_short + 1; |
| if (shift_olap > output_q) { |
| for (i = 0; i < n_short / 2; i++) { |
| fp[i] = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(src1[n_short / 2 + i], *win_fwd) >> |
| (shiftp - output_q), |
| fp[i]); |
| |
| fp[n_short - i - 1] = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(-src1[n_short / 2 + i], *win_rev) >> |
| (shiftp - output_q), |
| fp[n_short - i - 1]); |
| |
| win_fwd++; |
| win_rev--; |
| } |
| if (flag == 1) { |
| for (; i < n_short; i++) { |
| fp[i + n_short / 2] = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(-src1[n_short - i - 1], *win_fwd1) >> |
| (shiftp - output_q), |
| (fp[i + n_short / 2] >> (shift_olap - output_q))); |
| |
| fp[3 * n_short - n_short / 2 - i - 1] = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(-src1[n_short - i - 1], *win_rev1) >> |
| (shiftp - output_q), |
| (fp[3 * n_short - n_short / 2 - i - 1] >> (shift_olap - output_q))); |
| |
| win_fwd1--; |
| win_rev1++; |
| } |
| } else { |
| for (; i < n_short; i++) { |
| fp[i + n_short / 2] = |
| ixheaacd_add32_sat(-src1[n_short - i - 1] >> (shiftp - output_q), |
| fp[i + n_short / 2] >> (shift_olap - output_q)); |
| fp[3 * n_short - n_short / 2 - i - 1] = ixheaacd_add32_sat( |
| -src1[n_short - i - 1] >> (shiftp - output_q), |
| fp[3 * n_short - n_short / 2 - i - 1] >> (shift_olap - output_q)); |
| } |
| } |
| return (output_q); |
| } else { |
| for (i = 0; i < n_short / 2; i++) { |
| fp[i] = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(src1[n_short / 2 + i], *win_fwd) >> |
| (shiftp - shift_olap), |
| fp[i] >> (output_q - shift_olap)); |
| |
| fp[n_short - i - 1] = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(-src1[n_short / 2 + i], *win_rev) >> |
| (shiftp - shift_olap), |
| fp[n_short - i - 1]); |
| |
| win_fwd++; |
| win_rev--; |
| } |
| if (flag == 1) { |
| for (; i < n_short; i++) { |
| fp[i + n_short / 2] = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(-src1[n_short - i - 1], *win_fwd1) >> |
| (shiftp - shift_olap), |
| fp[i + n_short / 2]); |
| |
| fp[3 * n_short - n_short / 2 - i - 1] = ixheaacd_add32_sat( |
| ixheaacd_mult32_sh1(-src1[n_short - i - 1], *win_rev1) >> |
| (shiftp - shift_olap), |
| fp[3 * n_short - n_short / 2 - i - 1]); |
| |
| win_fwd1--; |
| win_rev1++; |
| } |
| } else { |
| for (; i < n_short; i++) { |
| fp[i + n_short / 2] = |
| ixheaacd_add32_sat(-src1[n_short - i - 1] >> (shiftp - shift_olap), |
| fp[i + n_short / 2]); |
| fp[3 * n_short - n_short / 2 - i - 1] = |
| ixheaacd_add32_sat(-src1[n_short - i - 1] >> (shiftp - shift_olap), |
| fp[3 * n_short - n_short / 2 - i - 1]); |
| } |
| } |
| return (shift_olap); |
| } |
| } |
| |
| VOID ixheaacd_scale_down(WORD32 *dest, WORD32 *src, WORD32 len, WORD8 shift1, |
| WORD8 shift2) { |
| WORD32 i; |
| if (shift1 > shift2) { |
| for (i = 0; i < len; i++) { |
| *dest = *src >> (shift1 - shift2); |
| src++; |
| dest++; |
| } |
| } else { |
| for (i = 0; i < len; i++) { |
| *dest = *src << (shift2 - shift1); |
| src++; |
| dest++; |
| } |
| } |
| } |
