| /****************************************************************************** |
| * * |
| * 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 <stdlib.h> |
| #include <math.h> |
| #include "ixheaac_type_def.h" |
| #include "ixheaac_constants.h" |
| #include "ixheaac_basic_ops32.h" |
| #include "ixheaac_fft_ifft_rom.h" |
| #include "ixheaacd_dsp_fft32x32s.h" |
| |
| #define DIG_REV(i, m, j) \ |
| do { \ |
| unsigned _ = (i); \ |
| _ = ((_ & 0x33333333) << 2) | ((_ & ~0x33333333) >> 2); \ |
| _ = ((_ & 0x0F0F0F0F) << 4) | ((_ & ~0x0F0F0F0F) >> 4); \ |
| _ = ((_ & 0x00FF00FF) << 8) | ((_ & ~0x00FF00FF) >> 8); \ |
| (j) = _ >> (m); \ |
| } while (0) |
| |
| FLOAT64 ixheaacd_mult32X32float(FLOAT64 a, FLOAT64 b) { |
| FLOAT64 result; |
| |
| result = a * b; |
| |
| return result; |
| } |
| |
| FLOAT64 ixheaacd_mac32X32float(FLOAT64 a, FLOAT64 b, FLOAT64 c) { |
| FLOAT64 result; |
| |
| result = a + b * c; |
| |
| return result; |
| } |
| |
| VOID ixheaacd_hbe_apply_ifft_7(FLOAT32 *inp, FLOAT32 *op) { |
| FLOAT32 x0r, x1r, x2r, x3r, x4r, x5r, x6r, x7r, x8r; |
| FLOAT32 x0i, x1i, x2i, x3i, x4i, x5i, x6i, x7i, x8i; |
| FLOAT32 y0r, y1r, y2r, y3r, y4r, y5r, y6r, y7r, y8r; |
| FLOAT32 y0i, y1i, y2i, y3i, y4i, y5i, y6i, y7i, y8i; |
| |
| x0r = inp[0]; |
| x0i = inp[1]; |
| x1r = inp[2] + inp[12]; |
| x1i = inp[3] + inp[13]; |
| x2r = inp[2] - inp[12]; |
| x2i = inp[3] - inp[13]; |
| x3r = inp[4] + inp[10]; |
| x3i = inp[5] + inp[11]; |
| x4r = inp[4] - inp[10]; |
| x4i = inp[5] - inp[11]; |
| x5r = inp[8] + inp[6]; |
| x5i = inp[9] + inp[7]; |
| x6r = inp[8] - inp[6]; |
| x6i = inp[9] - inp[7]; |
| |
| y0r = x0r; |
| y0i = x0i; |
| y1r = x1r + x3r + x5r; |
| y1i = x1i + x3i + x5i; |
| y2r = x1r - x3r; |
| y2i = x1i - x3i; |
| y3r = x5r - x1r; |
| y3i = x5i - x1i; |
| y4r = x3r - x5r; |
| y4i = x3i - x5i; |
| y5r = x2r + x4r + x6r; |
| y5i = x2i + x4i + x6i; |
| y6r = x2r - x4r; |
| y6i = x2i - x4i; |
| y7r = x6r - x2r; |
| y7i = x6i - x2i; |
| y8r = x4r - x6r; |
| y8i = x4i - x6i; |
| |
| x0r = y0r + y1r; |
| x0i = y0i + y1i; |
| x1r = y0r + C70 * y1r; |
| x1i = y0i + C70 * y1i; |
| x2r = C71 * y2r; |
| x2i = C71 * y2i; |
| x3r = C72 * y3r; |
| x3i = C72 * y3i; |
| x4r = C73 * y4r; |
| x4i = C73 * y4i; |
| x5r = C74 * y5i; |
| x5i = -C74 * y5r; |
| x6r = C75 * y6i; |
| x6i = -C75 * y6r; |
| x7r = C76 * y7i; |
| x7i = -C76 * y7r; |
| x8r = C77 * y8i; |
| x8i = -C77 * y8r; |
| |
| y0r = x0r; |
| y0i = x0i; |
| y1r = x1r + x2r + x4r; |
| y1i = x1i + x2i + x4i; |
| y2r = x1r - x2r - x3r; |
| y2i = x1i - x2i - x3i; |
| y3r = x1r + x3r - x4r; |
| y3i = x1i + x3i - x4i; |
| y4r = x5r + x6r + x8r; |
| y4i = x5i + x6i + x8i; |
| y5r = x5r - x6r - x7r; |
| y5i = x5i - x6i - x7i; |
| y6r = x5r + x7r - x8r; |
| y6i = x5i + x7i - x8i; |
| |
| x0r = y0r; |
| x0i = y0i; |
| x1r = y1r + y4r; |
| x1i = y1i + y4i; |
| x2r = y3r + y6r; |
| x2i = y3i + y6i; |
| x3r = y2r - y5r; |
| x3i = y2i - y5i; |
| x4r = y2r + y5r; |
| x4i = y2i + y5i; |
| x5r = y3r - y6r; |
| x5i = y3i - y6i; |
| x6r = y1r - y4r; |
| x6i = y1i - y4i; |
| |
| op[0] = x0r; |
| op[1] = x0i; |
| op[2] = x1r; |
| op[3] = x1i; |
| op[4] = x2r; |
| op[5] = x2i; |
| op[6] = x3r; |
| op[7] = x3i; |
| op[8] = x4r; |
| op[9] = x4i; |
| op[10] = x5r; |
| op[11] = x5i; |
| op[12] = x6r; |
| op[13] = x6i; |
| |
| return; |
| } |
| |
| VOID ixheaacd_hbe_apply_fft_3(FLOAT32 *inp, FLOAT32 *op, WORD32 i_sign) { |
| FLOAT32 add_r, sub_r; |
| FLOAT32 add_i, sub_i; |
| FLOAT32 X01r, X01i, temp; |
| |
| FLOAT32 p1, p2, p3, p4; |
| |
| FLOAT64 sinmu; |
| sinmu = -0.866025403784439 * (FLOAT64)i_sign; |
| |
| X01r = inp[0] + inp[2]; |
| X01i = inp[1] + inp[3]; |
| |
| add_r = inp[2] + inp[4]; |
| add_i = inp[3] + inp[5]; |
| |
| sub_r = inp[2] - inp[4]; |
| sub_i = inp[3] - inp[5]; |
| |
| p1 = add_r / (FLOAT32)2.0; |
| p4 = add_i / (FLOAT32)2.0; |
| p2 = (FLOAT32)((FLOAT64)sub_i * sinmu); |
| p3 = (FLOAT32)((FLOAT64)sub_r * sinmu); |
| |
| temp = inp[0] - p1; |
| |
| op[0] = X01r + inp[4]; |
| op[1] = X01i + inp[5]; |
| op[2] = temp + p2; |
| op[3] = (inp[1] - p3) - p4; |
| op[4] = temp - p2; |
| op[5] = (inp[1] + p3) - p4; |
| |
| return; |
| } |
| |
| VOID ixheaacd_hbe_apply_tw_mult_ifft(FLOAT32 *inp, FLOAT32 *op, WORD32 dim1, WORD32 dim2, |
| const FLOAT32 *tw) { |
| FLOAT32 accu1, accu2; |
| WORD32 i, j; |
| WORD32 step_val = (dim2 - 1) << 1; |
| for (i = 0; i < (dim2); i++) { |
| op[0] = inp[0]; |
| op[1] = inp[1]; |
| op += 2; |
| inp += 2; |
| } |
| |
| for (j = 0; j < (dim1 - 1); j++) { |
| op[0] = inp[0]; |
| op[1] = inp[1]; |
| inp += 2; |
| op += 2; |
| for (i = 0; i < (dim2 - 1); i++) { |
| CPLX_MPY_IFFT(accu1, accu2, inp[2 * i + 0], inp[2 * i + 1], tw[2 * i + 1], tw[2 * i]); |
| op[2 * i + 0] = accu1; |
| op[2 * i + 1] = accu2; |
| } |
| inp += step_val; |
| op += step_val; |
| tw += (dim2 - 1) * 2; |
| } |
| } |
| |
| VOID ixheaacd_hbe_apply_tw_mult_fft(FLOAT32 *inp, FLOAT32 *op, WORD32 dim1, WORD32 dim2, |
| const FLOAT32 *tw) { |
| FLOAT32 accu1, accu2; |
| WORD32 i, j; |
| WORD32 step_val = (dim2 - 1) << 1; |
| for (i = 0; i < (dim2); i++) { |
| op[0] = inp[0]; |
| op[1] = inp[1]; |
| op += 2; |
| inp += 2; |
| } |
| |
| for (j = 0; j < (dim1 - 1); j++) { |
| op[0] = inp[0]; |
| op[1] = inp[1]; |
| inp += 2; |
| op += 2; |
| for (i = 0; i < (dim2 - 1); i++) { |
| CPLX_MPY_FFT(accu1, accu2, inp[2 * i + 0], inp[2 * i + 1], tw[2 * i + 1], tw[2 * i]); |
| op[2 * i + 0] = accu1; |
| op[2 * i + 1] = accu2; |
| } |
| inp += step_val; |
| op += step_val; |
| tw += (dim2 - 1) * 2; |
| } |
| } |
| |
| VOID ixheaacd_hbe_apply_cfftn(FLOAT32 re[], FLOAT32 *scratch, WORD32 n_pass, WORD32 i_sign) { |
| WORD32 i, j, k, n_stages, h2; |
| FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i; |
| WORD32 del, nodespacing, in_loop_cnt; |
| WORD32 not_power_4; |
| WORD32 dig_rev_shift; |
| WORD32 mpass = n_pass; |
| WORD32 npoints = n_pass; |
| const FLOAT64 *ptr_w; |
| FLOAT32 *ptr_x = scratch; |
| FLOAT32 *y = scratch + (2 * n_pass); |
| FLOAT32 *ptr_y = y; |
| |
| dig_rev_shift = ixheaac_norm32(mpass) + 1 - 16; |
| n_stages = 30 - ixheaac_norm32(mpass); |
| not_power_4 = n_stages & 1; |
| |
| n_stages = n_stages >> 1; |
| |
| ptr_w = ixheaac_twid_tbl_fft_double; |
| ptr_x = re; |
| |
| if (i_sign == -1) { |
| for (i = 0; i < npoints; i += 4) { |
| FLOAT32 *inp = ptr_x; |
| FLOAT32 tmk; |
| |
| DIG_REV(i, dig_rev_shift, h2); |
| if (not_power_4) { |
| h2 += 1; |
| h2 &= ~1; |
| } |
| inp += (h2); |
| |
| x0r = *inp; |
| x0i = *(inp + 1); |
| inp += (npoints >> 1); |
| |
| x1r = *inp; |
| x1i = *(inp + 1); |
| inp += (npoints >> 1); |
| |
| x2r = *inp; |
| x2i = *(inp + 1); |
| inp += (npoints >> 1); |
| |
| x3r = *inp; |
| x3i = *(inp + 1); |
| |
| x0r = x0r + x2r; |
| x0i = x0i + x2i; |
| |
| tmk = x0r - x2r; |
| x2r = tmk - x2r; |
| tmk = x0i - x2i; |
| x2i = tmk - x2i; |
| |
| x1r = x1r + x3r; |
| x1i = x1i + x3i; |
| |
| tmk = x1r - x3r; |
| x3r = tmk - x3r; |
| tmk = x1i - x3i; |
| x3i = tmk - x3i; |
| |
| x0r = x0r + x1r; |
| x0i = x0i + x1i; |
| |
| tmk = x0r - x1r; |
| x1r = tmk - x1r; |
| tmk = x0i - x1i; |
| x1i = tmk - x1i; |
| |
| x2r = x2r + x3i; |
| x2i = x2i - x3r; |
| |
| tmk = x2r - x3i; |
| x3i = tmk - x3i; |
| tmk = x2i + x3r; |
| x3r = tmk + x3r; |
| |
| *ptr_y++ = x0r; |
| *ptr_y++ = x0i; |
| *ptr_y++ = x2r; |
| *ptr_y++ = x2i; |
| *ptr_y++ = x1r; |
| *ptr_y++ = x1i; |
| *ptr_y++ = x3i; |
| *ptr_y++ = x3r; |
| } |
| ptr_y -= 2 * npoints; |
| del = 4; |
| nodespacing = 64; |
| in_loop_cnt = npoints >> 4; |
| for (i = n_stages - 1; i > 0; i--) { |
| const FLOAT64 *twiddles = ptr_w; |
| FLOAT32 *data = ptr_y; |
| FLOAT64 W1, W2, W3, W4, W5, W6; |
| WORD32 sec_loop_cnt; |
| |
| for (k = in_loop_cnt; k != 0; k--) { |
| x0r = (*data); |
| x0i = (*(data + 1)); |
| data += (del << 1); |
| |
| x1r = (*data); |
| x1i = (*(data + 1)); |
| data += (del << 1); |
| |
| x2r = (*data); |
| x2i = (*(data + 1)); |
| data += (del << 1); |
| |
| x3r = (*data); |
| x3i = (*(data + 1)); |
| data -= 3 * (del << 1); |
| |
| x0r = x0r + x2r; |
| x0i = x0i + x2i; |
| x2r = x0r - (x2r * 2); |
| x2i = x0i - (x2i * 2); |
| x1r = x1r + x3r; |
| x1i = x1i + x3i; |
| x3r = x1r - (x3r * 2); |
| x3i = x1i - (x3i * 2); |
| |
| x0r = x0r + x1r; |
| x0i = x0i + x1i; |
| x1r = x0r - (x1r * 2); |
| x1i = x0i - (x1i * 2); |
| x2r = x2r + x3i; |
| x2i = x2i - x3r; |
| x3i = x2r - (x3i * 2); |
| x3r = x2i + (x3r * 2); |
| |
| *data = x0r; |
| *(data + 1) = x0i; |
| data += (del << 1); |
| |
| *data = x2r; |
| *(data + 1) = x2i; |
| data += (del << 1); |
| |
| *data = x1r; |
| *(data + 1) = x1i; |
| data += (del << 1); |
| |
| *data = x3i; |
| *(data + 1) = x3r; |
| data += (del << 1); |
| } |
| data = ptr_y + 2; |
| |
| sec_loop_cnt = (nodespacing * del); |
| sec_loop_cnt = (sec_loop_cnt / 4) + (sec_loop_cnt / 8) - (sec_loop_cnt / 16) + |
| (sec_loop_cnt / 32) - (sec_loop_cnt / 64) + (sec_loop_cnt / 128) - |
| (sec_loop_cnt / 256); |
| j = nodespacing; |
| |
| for (j = nodespacing; j <= sec_loop_cnt; j += nodespacing) { |
| W1 = *(twiddles + j); |
| W4 = *(twiddles + j + 257); |
| W2 = *(twiddles + (j << 1)); |
| W5 = *(twiddles + (j << 1) + 257); |
| W3 = *(twiddles + j + (j << 1)); |
| W6 = *(twiddles + j + (j << 1) + 257); |
| |
| for (k = in_loop_cnt; k != 0; k--) { |
| FLOAT32 tmp; |
| FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i; |
| |
| data += (del << 1); |
| |
| x1r = *data; |
| x1i = *(data + 1); |
| data += (del << 1); |
| |
| x2r = *data; |
| x2i = *(data + 1); |
| data += (del << 1); |
| |
| x3r = *data; |
| x3i = *(data + 1); |
| data -= 3 * (del << 1); |
| |
| tmp = (FLOAT32)(ixheaacd_mult32X32float((FLOAT64)x1r, W1) - |
| ixheaacd_mult32X32float((FLOAT64)x1i, W4)); |
| x1i = (FLOAT32)ixheaacd_mac32X32float(ixheaacd_mult32X32float((FLOAT64)x1r, W4), |
| (FLOAT64)x1i, W1); |
| x1r = tmp; |
| |
| tmp = (FLOAT32)(ixheaacd_mult32X32float((FLOAT64)x2r, W2) - |
| ixheaacd_mult32X32float((FLOAT64)x2i, W5)); |
| x2i = (FLOAT32)ixheaacd_mac32X32float(ixheaacd_mult32X32float((FLOAT64)x2r, W5), |
| (FLOAT64)x2i, W2); |
| x2r = tmp; |
| |
| tmp = (FLOAT32)(ixheaacd_mult32X32float((FLOAT64)x3r, W3) - |
| ixheaacd_mult32X32float((FLOAT64)x3i, W6)); |
| x3i = (FLOAT32)ixheaacd_mac32X32float(ixheaacd_mult32X32float((FLOAT64)x3r, W6), |
| (FLOAT64)x3i, W3); |
| x3r = tmp; |
| |
| x0r = (*data); |
| x0i = (*(data + 1)); |
| |
| x0r = x0r + (x2r); |
| x0i = x0i + (x2i); |
| x2r = x0r - (x2r * 2); |
| x2i = x0i - (x2i * 2); |
| x1r = x1r + x3r; |
| x1i = x1i + x3i; |
| x3r = x1r - (x3r * 2); |
| x3i = x1i - (x3i * 2); |
| |
| x0r = x0r + (x1r); |
| x0i = x0i + (x1i); |
| x1r = x0r - (x1r * 2); |
| x1i = x0i - (x1i * 2); |
| x2r = x2r + (x3i); |
| x2i = x2i - (x3r); |
| x3i = x2r - (x3i * 2); |
| x3r = x2i + (x3r * 2); |
| |
| *data = x0r; |
| *(data + 1) = x0i; |
| data += (del << 1); |
| |
| *data = x2r; |
| *(data + 1) = x2i; |
| data += (del << 1); |
| |
| *data = x1r; |
| *(data + 1) = x1i; |
| data += (del << 1); |
| |
| *data = x3i; |
| *(data + 1) = x3r; |
| data += (del << 1); |
| } |
| data -= 2 * npoints; |
| data += 2; |
| } |
| for (; j <= (nodespacing * del) >> 1; j += nodespacing) { |
| W1 = *(twiddles + j); |
| W4 = *(twiddles + j + 257); |
| W2 = *(twiddles + (j << 1)); |
| W5 = *(twiddles + (j << 1) + 257); |
| W3 = *(twiddles + j + (j << 1) - 256); |
| W6 = *(twiddles + j + (j << 1) + 1); |
| |
| for (k = in_loop_cnt; k != 0; k--) { |
| FLOAT32 tmp; |
| FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i; |
| |
| data += (del << 1); |
| |
| x1r = *data; |
| x1i = *(data + 1); |
| data += (del << 1); |
| |
| x2r = *data; |
| x2i = *(data + 1); |
| data += (del << 1); |
| |
| x3r = *data; |
| x3i = *(data + 1); |
| data -= 3 * (del << 1); |
| |
| tmp = (FLOAT32)(ixheaacd_mult32X32float((FLOAT64)x1r, W1) - |
| ixheaacd_mult32X32float((FLOAT64)x1i, W4)); |
| x1i = (FLOAT32)ixheaacd_mac32X32float(ixheaacd_mult32X32float((FLOAT64)x1r, W4), |
| (FLOAT64)x1i, W1); |
| x1r = tmp; |
| |
| tmp = (FLOAT32)(ixheaacd_mult32X32float((FLOAT64)x2r, W2) - |
| ixheaacd_mult32X32float((FLOAT64)x2i, W5)); |
| x2i = (FLOAT32)ixheaacd_mac32X32float(ixheaacd_mult32X32float((FLOAT64)x2r, W5), |
| (FLOAT64)x2i, W2); |
| x2r = tmp; |
| |
| tmp = (FLOAT32)(ixheaacd_mult32X32float((FLOAT64)x3r, W6) + |
| ixheaacd_mult32X32float((FLOAT64)x3i, W3)); |
| x3i = (FLOAT32)(-ixheaacd_mult32X32float((FLOAT64)x3r, W3) + |
| ixheaacd_mult32X32float((FLOAT64)x3i, W6)); |
| x3r = tmp; |
| |
| x0r = (*data); |
| x0i = (*(data + 1)); |
| |
| x0r = x0r + (x2r); |
| x0i = x0i + (x2i); |
| x2r = x0r - (x2r * 2); |
| x2i = x0i - (x2i * 2); |
| x1r = x1r + x3r; |
| x1i = x1i + x3i; |
| x3r = x1r - (x3r * 2); |
| x3i = x1i - (x3i * 2); |
| |
| x0r = x0r + (x1r); |
| x0i = x0i + (x1i); |
| x1r = x0r - (x1r * 2); |
| x1i = x0i - (x1i * 2); |
| x2r = x2r + (x3i); |
| x2i = x2i - (x3r); |
| x3i = x2r - (x3i * 2); |
| x3r = x2i + (x3r * 2); |
| |
| *data = x0r; |
| *(data + 1) = x0i; |
| data += (del << 1); |
| |
| *data = x2r; |
| *(data + 1) = x2i; |
| data += (del << 1); |
| |
| *data = x1r; |
| *(data + 1) = x1i; |
| data += (del << 1); |
| |
| *data = x3i; |
| *(data + 1) = x3r; |
| data += (del << 1); |
| } |
| data -= 2 * npoints; |
| data += 2; |
| } |
| for (; j <= sec_loop_cnt * 2; j += nodespacing) { |
| W1 = *(twiddles + j); |
| W4 = *(twiddles + j + 257); |
| W2 = *(twiddles + (j << 1) - 256); |
| W5 = *(twiddles + (j << 1) + 1); |
| W3 = *(twiddles + j + (j << 1) - 256); |
| W6 = *(twiddles + j + (j << 1) + 1); |
| |
| for (k = in_loop_cnt; k != 0; k--) { |
| FLOAT32 tmp; |
| FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i; |
| |
| data += (del << 1); |
| |
| x1r = *data; |
| x1i = *(data + 1); |
| data += (del << 1); |
| |
| x2r = *data; |
| x2i = *(data + 1); |
| data += (del << 1); |
| |
| x3r = *data; |
| x3i = *(data + 1); |
| data -= 3 * (del << 1); |
| |
| tmp = (FLOAT32)(ixheaacd_mult32X32float((FLOAT64)x1r, W1) - |
| ixheaacd_mult32X32float((FLOAT64)x1i, W4)); |
| x1i = (FLOAT32)ixheaacd_mac32X32float(ixheaacd_mult32X32float(x1r, W4), x1i, W1); |
| x1r = tmp; |
| |
| tmp = (FLOAT32)(ixheaacd_mult32X32float((FLOAT64)x2r, W5) + |
| ixheaacd_mult32X32float((FLOAT64)x2i, W2)); |
| x2i = (FLOAT32)(-ixheaacd_mult32X32float(x2r, W2) + ixheaacd_mult32X32float(x2i, W5)); |
| x2r = tmp; |
| |
| tmp = (FLOAT32)(ixheaacd_mult32X32float((FLOAT64)x3r, W6) + |
| ixheaacd_mult32X32float((FLOAT64)x3i, W3)); |
| x3i = (FLOAT32)(-ixheaacd_mult32X32float((FLOAT64)x3r, W3) + |
| ixheaacd_mult32X32float((FLOAT64)x3i, W6)); |
| x3r = tmp; |
| |
| x0r = (*data); |
| x0i = (*(data + 1)); |
| |
| x0r = x0r + (x2r); |
| x0i = x0i + (x2i); |
| x2r = x0r - (x2r * 2); |
| x2i = x0i - (x2i * 2); |
| x1r = x1r + x3r; |
| x1i = x1i + x3i; |
| x3r = x1r - (x3r * 2); |
| x3i = x1i - (x3i * 2); |
| |
| x0r = x0r + (x1r); |
| x0i = x0i + (x1i); |
| x1r = x0r - (x1r * 2); |
| x1i = x0i - (x1i * 2); |
| x2r = x2r + (x3i); |
| x2i = x2i - (x3r); |
| x3i = x2r - (x3i * 2); |
| x3r = x2i + (x3r * 2); |
| |
| *data = x0r; |
| *(data + 1) = x0i; |
| data += (del << 1); |
| |
| *data = x2r; |
| *(data + 1) = x2i; |
| data += (del << 1); |
| |
| *data = x1r; |
| *(data + 1) = x1i; |
| data += (del << 1); |
| |
| *data = x3i; |
| *(data + 1) = x3r; |
| data += (del << 1); |
| } |
| data -= 2 * npoints; |
| data += 2; |
| } |
| for (; j < nodespacing * del; j += nodespacing) { |
| W1 = *(twiddles + j); |
| W4 = *(twiddles + j + 257); |
| W2 = *(twiddles + (j << 1) - 256); |
| W5 = *(twiddles + (j << 1) + 1); |
| W3 = *(twiddles + j + (j << 1) - 512); |
| W6 = *(twiddles + j + (j << 1) - 512 + 257); |
| |
| for (k = in_loop_cnt; k != 0; k--) { |
| FLOAT32 tmp; |
| FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i; |
| |
| data += (del << 1); |
| |
| x1r = *data; |
| x1i = *(data + 1); |
| data += (del << 1); |
| |
| x2r = *data; |
| x2i = *(data + 1); |
| data += (del << 1); |
| |
| x3r = *data; |
| x3i = *(data + 1); |
| data -= 3 * (del << 1); |
| |
| tmp = (FLOAT32)(ixheaacd_mult32X32float((FLOAT64)x1r, W1) - |
| ixheaacd_mult32X32float((FLOAT64)x1i, W4)); |
| x1i = (FLOAT32)ixheaacd_mac32X32float(ixheaacd_mult32X32float((FLOAT64)x1r, W4), |
| (FLOAT64)x1i, W1); |
| x1r = tmp; |
| |
| tmp = (FLOAT32)(ixheaacd_mult32X32float((FLOAT64)x2r, W5) + |
| ixheaacd_mult32X32float((FLOAT64)x2i, W2)); |
| x2i = (FLOAT32)(-ixheaacd_mult32X32float((FLOAT64)x2r, W2) + |
| ixheaacd_mult32X32float((FLOAT64)x2i, W5)); |
| x2r = tmp; |
| |
| tmp = (FLOAT32)(-ixheaacd_mult32X32float((FLOAT64)x3r, W3) + |
| ixheaacd_mult32X32float((FLOAT64)x3i, W6)); |
| x3i = (FLOAT32)ixheaacd_mac32X32float(ixheaacd_mult32X32float((FLOAT64)x3r, W6), |
| (FLOAT64)x3i, W3); |
| x3r = tmp; |
| |
| x0r = (*data); |
| x0i = (*(data + 1)); |
| |
| x0r = x0r + (x2r); |
| x0i = x0i + (x2i); |
| x2r = x0r - (x2r * 2); |
| x2i = x0i - (x2i * 2); |
| x1r = x1r + x3r; |
| x1i = x1i - x3i; |
| x3r = x1r - (x3r * 2); |
| x3i = x1i + (x3i * 2); |
| |
| x0r = x0r + (x1r); |
| x0i = x0i + (x1i); |
| x1r = x0r - (x1r * 2); |
| x1i = x0i - (x1i * 2); |
| x2r = x2r + (x3i); |
| x2i = x2i - (x3r); |
| x3i = x2r - (x3i * 2); |
| x3r = x2i + (x3r * 2); |
| |
| *data = x0r; |
| *(data + 1) = x0i; |
| data += (del << 1); |
| |
| *data = x2r; |
| *(data + 1) = x2i; |
| data += (del << 1); |
| |
| *data = x1r; |
| *(data + 1) = x1i; |
| data += (del << 1); |
| |
| *data = x3i; |
| *(data + 1) = x3r; |
| data += (del << 1); |
| } |
| data -= 2 * npoints; |
| data += 2; |
| } |
| nodespacing >>= 2; |
| del <<= 2; |
| in_loop_cnt >>= 2; |
| } |
| if (not_power_4) { |
| const FLOAT64 *twiddles = ptr_w; |
| nodespacing <<= 1; |
| |
| for (j = del / 2; j != 0; j--) { |
| FLOAT64 W1 = *twiddles; |
| FLOAT64 W4 = *(twiddles + 257); |
| FLOAT32 tmp; |
| twiddles += nodespacing; |
| |
| x0r = *ptr_y; |
| x0i = *(ptr_y + 1); |
| ptr_y += (del << 1); |
| |
| x1r = *ptr_y; |
| x1i = *(ptr_y + 1); |
| |
| tmp = (FLOAT32)(ixheaacd_mult32X32float((FLOAT64)x1r, W1) - |
| ixheaacd_mult32X32float((FLOAT64)x1i, W4)); |
| x1i = (FLOAT32)ixheaacd_mac32X32float(ixheaacd_mult32X32float((FLOAT64)x1r, W4), |
| (FLOAT64)x1i, W1); |
| x1r = tmp; |
| |
| *ptr_y = (x0r) - (x1r); |
| *(ptr_y + 1) = (x0i) - (x1i); |
| ptr_y -= (del << 1); |
| |
| *ptr_y = (x0r) + (x1r); |
| *(ptr_y + 1) = (x0i) + (x1i); |
| ptr_y += 2; |
| } |
| twiddles = ptr_w; |
| for (j = del / 2; j != 0; j--) { |
| FLOAT64 W1 = *twiddles; |
| FLOAT64 W4 = *(twiddles + 257); |
| FLOAT32 tmp; |
| twiddles += nodespacing; |
| |
| x0r = *ptr_y; |
| x0i = *(ptr_y + 1); |
| ptr_y += (del << 1); |
| |
| x1r = *ptr_y; |
| x1i = *(ptr_y + 1); |
| |
| tmp = (FLOAT32)(ixheaacd_mult32X32float((FLOAT64)x1r, W4) + |
| ixheaacd_mult32X32float((FLOAT64)x1i, W1)); |
| x1i = (FLOAT32)(-ixheaacd_mult32X32float((FLOAT64)x1r, W1) + |
| ixheaacd_mult32X32float((FLOAT64)x1i, W4)); |
| x1r = tmp; |
| |
| *ptr_y = (x0r) - (x1r); |
| *(ptr_y + 1) = (x0i) - (x1i); |
| ptr_y -= (del << 1); |
| |
| *ptr_y = (x0r) + (x1r); |
| *(ptr_y + 1) = (x0i) + (x1i); |
| ptr_y += 2; |
| } |
| } |
| } else { |
| for (i = 0; i < npoints; i += 4) { |
| FLOAT32 *inp = ptr_x; |
| |
| DIG_REV(i, dig_rev_shift, h2); |
| if (not_power_4) { |
| h2 += 1; |
| h2 &= ~1; |
| } |
| inp += (h2); |
| |
| x0r = *inp; |
| x0i = *(inp + 1); |
| inp += (npoints >> 1); |
| |
| x1r = *inp; |
| x1i = *(inp + 1); |
| inp += (npoints >> 1); |
| |
| x2r = *inp; |
| x2i = *(inp + 1); |
| inp += (npoints >> 1); |
| |
| x3r = *inp; |
| x3i = *(inp + 1); |
| |
| x0r = x0r + x2r; |
| x0i = x0i + x2i; |
| x2r = x0r - (x2r * 2); |
| x2i = x0i - (x2i * 2); |
| x1r = x1r + x3r; |
| x1i = x1i + x3i; |
| x3r = x1r - (x3r * 2); |
| x3i = x1i - (x3i * 2); |
| |
| x0r = x0r + x1r; |
| x0i = x0i + x1i; |
| x1r = x0r - (x1r * 2); |
| x1i = x0i - (x1i * 2); |
| x2r = x2r - x3i; |
| x2i = x2i + x3r; |
| x3i = x2r + (x3i * 2); |
| x3r = x2i - (x3r * 2); |
| |
| *ptr_y++ = x0r; |
| *ptr_y++ = x0i; |
| *ptr_y++ = x2r; |
| *ptr_y++ = x2i; |
| *ptr_y++ = x1r; |
| *ptr_y++ = x1i; |
| *ptr_y++ = x3i; |
| *ptr_y++ = x3r; |
| } |
| ptr_y -= 2 * npoints; |
| del = 4; |
| nodespacing = 64; |
| in_loop_cnt = npoints >> 4; |
| for (i = n_stages - 1; i > 0; i--) { |
| const FLOAT64 *twiddles = ptr_w; |
| FLOAT32 *data = ptr_y; |
| FLOAT64 W1, W2, W3, W4, W5, W6; |
| WORD32 sec_loop_cnt; |
| |
| for (k = in_loop_cnt; k != 0; k--) { |
| x0r = (*data); |
| x0i = (*(data + 1)); |
| data += (del << 1); |
| |
| x1r = (*data); |
| x1i = (*(data + 1)); |
| data += (del << 1); |
| |
| x2r = (*data); |
| x2i = (*(data + 1)); |
| data += (del << 1); |
| |
| x3r = (*data); |
| x3i = (*(data + 1)); |
| data -= 3 * (del << 1); |
| |
| x0r = x0r + x2r; |
| x0i = x0i + x2i; |
| x2r = x0r - (x2r * 2); |
| x2i = x0i - (x2i * 2); |
| x1r = x1r + x3r; |
| x1i = x1i + x3i; |
| x3r = x1r - (x3r * 2); |
| x3i = x1i - (x3i * 2); |
| |
| x0r = x0r + x1r; |
| x0i = x0i + x1i; |
| x1r = x0r - (x1r * 2); |
| x1i = x0i - (x1i * 2); |
| x2r = x2r - x3i; |
| x2i = x2i + x3r; |
| x3i = x2r + (x3i * 2); |
| x3r = x2i - (x3r * 2); |
| |
| *data = x0r; |
| *(data + 1) = x0i; |
| data += (del << 1); |
| |
| *data = x2r; |
| *(data + 1) = x2i; |
| data += (del << 1); |
| |
| *data = x1r; |
| *(data + 1) = x1i; |
| data += (del << 1); |
| |
| *data = x3i; |
| *(data + 1) = x3r; |
| data += (del << 1); |
| } |
| data = ptr_y + 2; |
| |
| sec_loop_cnt = (nodespacing * del); |
| sec_loop_cnt = (sec_loop_cnt / 4) + (sec_loop_cnt / 8) - (sec_loop_cnt / 16) + |
| (sec_loop_cnt / 32) - (sec_loop_cnt / 64) + (sec_loop_cnt / 128) - |
| (sec_loop_cnt / 256); |
| j = nodespacing; |
| |
| for (j = nodespacing; j <= sec_loop_cnt; j += nodespacing) { |
| W1 = *(twiddles + j); |
| W4 = *(twiddles + j + 257); |
| W2 = *(twiddles + (j << 1)); |
| W5 = *(twiddles + (j << 1) + 257); |
| W3 = *(twiddles + j + (j << 1)); |
| W6 = *(twiddles + j + (j << 1) + 257); |
| |
| for (k = in_loop_cnt; k != 0; k--) { |
| FLOAT32 tmp; |
| FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i; |
| |
| data += (del << 1); |
| |
| x1r = *data; |
| x1i = *(data + 1); |
| data += (del << 1); |
| |
| x2r = *data; |
| x2i = *(data + 1); |
| data += (del << 1); |
| |
| x3r = *data; |
| x3i = *(data + 1); |
| data -= 3 * (del << 1); |
| |
| tmp = (FLOAT32)(((FLOAT64)x1r * W1) + ((FLOAT64)x1i * W4)); |
| x1i = (FLOAT32)(-((FLOAT64)x1r * W4) + (FLOAT64)x1i * W1); |
| x1r = tmp; |
| |
| tmp = (FLOAT32)(((FLOAT64)x2r * W2) + ((FLOAT64)x2i * W5)); |
| x2i = (FLOAT32)(-((FLOAT64)x2r * W5) + (FLOAT64)x2i * W2); |
| x2r = tmp; |
| |
| tmp = (FLOAT32)(((FLOAT64)x3r * W3) + ((FLOAT64)x3i * W6)); |
| x3i = (FLOAT32)(-((FLOAT64)x3r * W6) + (FLOAT64)x3i * W3); |
| x3r = tmp; |
| |
| x0r = (*data); |
| x0i = (*(data + 1)); |
| |
| x0r = x0r + (x2r); |
| x0i = x0i + (x2i); |
| x2r = x0r - (x2r * 2); |
| x2i = x0i - (x2i * 2); |
| x1r = x1r + x3r; |
| x1i = x1i + x3i; |
| x3r = x1r - (x3r * 2); |
| x3i = x1i - (x3i * 2); |
| |
| x0r = x0r + (x1r); |
| x0i = x0i + (x1i); |
| x1r = x0r - (x1r * 2); |
| x1i = x0i - (x1i * 2); |
| x2r = x2r - (x3i); |
| x2i = x2i + (x3r); |
| x3i = x2r + (x3i * 2); |
| x3r = x2i - (x3r * 2); |
| |
| *data = x0r; |
| *(data + 1) = x0i; |
| data += (del << 1); |
| |
| *data = x2r; |
| *(data + 1) = x2i; |
| data += (del << 1); |
| |
| *data = x1r; |
| *(data + 1) = x1i; |
| data += (del << 1); |
| |
| *data = x3i; |
| *(data + 1) = x3r; |
| data += (del << 1); |
| } |
| data -= 2 * npoints; |
| data += 2; |
| } |
| for (; j <= (nodespacing * del) >> 1; j += nodespacing) { |
| W1 = *(twiddles + j); |
| W4 = *(twiddles + j + 257); |
| W2 = *(twiddles + (j << 1)); |
| W5 = *(twiddles + (j << 1) + 257); |
| W3 = *(twiddles + j + (j << 1) - 256); |
| W6 = *(twiddles + j + (j << 1) + 1); |
| |
| for (k = in_loop_cnt; k != 0; k--) { |
| FLOAT32 tmp; |
| FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i; |
| |
| data += (del << 1); |
| |
| x1r = *data; |
| x1i = *(data + 1); |
| data += (del << 1); |
| |
| x2r = *data; |
| x2i = *(data + 1); |
| data += (del << 1); |
| |
| x3r = *data; |
| x3i = *(data + 1); |
| data -= 3 * (del << 1); |
| |
| tmp = (FLOAT32)(((FLOAT64)x1r * W1) + ((FLOAT64)x1i * W4)); |
| x1i = (FLOAT32)(-((FLOAT64)x1r * W4) + (FLOAT64)x1i * W1); |
| x1r = tmp; |
| |
| tmp = (FLOAT32)(((FLOAT64)x2r * W2) + ((FLOAT64)x2i * W5)); |
| x2i = (FLOAT32)(-((FLOAT64)x2r * W5) + (FLOAT64)x2i * W2); |
| x2r = tmp; |
| |
| tmp = (FLOAT32)(((FLOAT64)x3r * W6) - ((FLOAT64)x3i * W3)); |
| x3i = (FLOAT32)(((FLOAT64)x3r * W3) + ((FLOAT64)x3i * W6)); |
| x3r = tmp; |
| |
| x0r = (*data); |
| x0i = (*(data + 1)); |
| |
| x0r = x0r + (x2r); |
| x0i = x0i + (x2i); |
| x2r = x0r - (x2r * 2); |
| x2i = x0i - (x2i * 2); |
| x1r = x1r + x3r; |
| x1i = x1i + x3i; |
| x3r = x1r - (x3r * 2); |
| x3i = x1i - (x3i * 2); |
| |
| x0r = x0r + (x1r); |
| x0i = x0i + (x1i); |
| x1r = x0r - (x1r * 2); |
| x1i = x0i - (x1i * 2); |
| x2r = x2r - (x3i); |
| x2i = x2i + (x3r); |
| x3i = x2r + (x3i * 2); |
| x3r = x2i - (x3r * 2); |
| |
| *data = x0r; |
| *(data + 1) = x0i; |
| data += (del << 1); |
| |
| *data = x2r; |
| *(data + 1) = x2i; |
| data += (del << 1); |
| |
| *data = x1r; |
| *(data + 1) = x1i; |
| data += (del << 1); |
| |
| *data = x3i; |
| *(data + 1) = x3r; |
| data += (del << 1); |
| } |
| data -= 2 * npoints; |
| data += 2; |
| } |
| for (; j <= sec_loop_cnt * 2; j += nodespacing) { |
| W1 = *(twiddles + j); |
| W4 = *(twiddles + j + 257); |
| W2 = *(twiddles + (j << 1) - 256); |
| W5 = *(twiddles + (j << 1) + 1); |
| W3 = *(twiddles + j + (j << 1) - 256); |
| W6 = *(twiddles + j + (j << 1) + 1); |
| |
| for (k = in_loop_cnt; k != 0; k--) { |
| FLOAT32 tmp; |
| FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i; |
| |
| data += (del << 1); |
| |
| x1r = *data; |
| x1i = *(data + 1); |
| data += (del << 1); |
| |
| x2r = *data; |
| x2i = *(data + 1); |
| data += (del << 1); |
| |
| x3r = *data; |
| x3i = *(data + 1); |
| data -= 3 * (del << 1); |
| |
| tmp = (FLOAT32)(((FLOAT64)x1r * W1) + ((FLOAT64)x1i * W4)); |
| x1i = (FLOAT32)(-((FLOAT64)x1r * W4) + (FLOAT64)x1i * W1); |
| x1r = tmp; |
| |
| tmp = (FLOAT32)(((FLOAT64)x2r * W5) - ((FLOAT64)x2i * W2)); |
| x2i = (FLOAT32)(((FLOAT64)x2r * W2) + ((FLOAT64)x2i * W5)); |
| x2r = tmp; |
| |
| tmp = (FLOAT32)(((FLOAT64)x3r * W6) - ((FLOAT64)x3i * W3)); |
| x3i = (FLOAT32)(((FLOAT64)x3r * W3) + ((FLOAT64)x3i * W6)); |
| x3r = tmp; |
| |
| x0r = (*data); |
| x0i = (*(data + 1)); |
| |
| x0r = x0r + (x2r); |
| x0i = x0i + (x2i); |
| x2r = x0r - (x2r * 2); |
| x2i = x0i - (x2i * 2); |
| x1r = x1r + x3r; |
| x1i = x1i + x3i; |
| x3r = x1r - (x3r * 2); |
| x3i = x1i - (x3i * 2); |
| |
| x0r = x0r + (x1r); |
| x0i = x0i + (x1i); |
| x1r = x0r - (x1r * 2); |
| x1i = x0i - (x1i * 2); |
| x2r = x2r - (x3i); |
| x2i = x2i + (x3r); |
| x3i = x2r + (x3i * 2); |
| x3r = x2i - (x3r * 2); |
| |
| *data = x0r; |
| *(data + 1) = x0i; |
| data += (del << 1); |
| |
| *data = x2r; |
| *(data + 1) = x2i; |
| data += (del << 1); |
| |
| *data = x1r; |
| *(data + 1) = x1i; |
| data += (del << 1); |
| |
| *data = x3i; |
| *(data + 1) = x3r; |
| data += (del << 1); |
| } |
| data -= 2 * npoints; |
| data += 2; |
| } |
| for (; j < nodespacing * del; j += nodespacing) { |
| W1 = *(twiddles + j); |
| W4 = *(twiddles + j + 257); |
| W2 = *(twiddles + (j << 1) - 256); |
| W5 = *(twiddles + (j << 1) + 1); |
| W3 = *(twiddles + j + (j << 1) - 512); |
| W6 = *(twiddles + j + (j << 1) - 512 + 257); |
| |
| for (k = in_loop_cnt; k != 0; k--) { |
| FLOAT32 tmp; |
| FLOAT32 x0r, x0i, x1r, x1i, x2r, x2i, x3r, x3i; |
| |
| data += (del << 1); |
| |
| x1r = *data; |
| x1i = *(data + 1); |
| data += (del << 1); |
| |
| x2r = *data; |
| x2i = *(data + 1); |
| data += (del << 1); |
| |
| x3r = *data; |
| x3i = *(data + 1); |
| data -= 3 * (del << 1); |
| |
| tmp = (FLOAT32)(((FLOAT64)x1r * W1) + ((FLOAT64)x1i * W4)); |
| x1i = (FLOAT32)(-((FLOAT64)x1r * W4) + (FLOAT64)x1i * W1); |
| x1r = tmp; |
| |
| tmp = (FLOAT32)(((FLOAT64)x2r * W5) - ((FLOAT64)x2i * W2)); |
| x2i = (FLOAT32)(((FLOAT64)x2r * W2) + ((FLOAT64)x2i * W5)); |
| x2r = tmp; |
| |
| tmp = (FLOAT32)(-((FLOAT64)x3r * W3) - ((FLOAT64)x3i * W6)); |
| x3i = (FLOAT32)(-((FLOAT64)x3r * W6) + (FLOAT64)x3i * W3); |
| x3r = tmp; |
| |
| x0r = (*data); |
| x0i = (*(data + 1)); |
| |
| x0r = x0r + (x2r); |
| x0i = x0i + (x2i); |
| x2r = x0r - (x2r * 2); |
| x2i = x0i - (x2i * 2); |
| x1r = x1r + x3r; |
| x1i = x1i - x3i; |
| x3r = x1r - (x3r * 2); |
| x3i = x1i + (x3i * 2); |
| |
| x0r = x0r + (x1r); |
| x0i = x0i + (x1i); |
| x1r = x0r - (x1r * 2); |
| x1i = x0i - (x1i * 2); |
| x2r = x2r - (x3i); |
| x2i = x2i + (x3r); |
| x3i = x2r + (x3i * 2); |
| x3r = x2i - (x3r * 2); |
| |
| *data = x0r; |
| *(data + 1) = x0i; |
| data += (del << 1); |
| |
| *data = x2r; |
| *(data + 1) = x2i; |
| data += (del << 1); |
| |
| *data = x1r; |
| *(data + 1) = x1i; |
| data += (del << 1); |
| |
| *data = x3i; |
| *(data + 1) = x3r; |
| data += (del << 1); |
| } |
| data -= 2 * npoints; |
| data += 2; |
| } |
| nodespacing >>= 2; |
| del <<= 2; |
| in_loop_cnt >>= 2; |
| } |
| |
| if (not_power_4) { |
| const FLOAT64 *twiddles = ptr_w; |
| nodespacing <<= 1; |
| |
| for (j = del / 2; j != 0; j--) { |
| FLOAT64 W1 = *twiddles; |
| FLOAT64 W4 = *(twiddles + 257); |
| FLOAT32 tmp; |
| twiddles += nodespacing; |
| |
| x0r = *ptr_y; |
| x0i = *(ptr_y + 1); |
| ptr_y += (del << 1); |
| |
| x1r = *ptr_y; |
| x1i = *(ptr_y + 1); |
| |
| tmp = (FLOAT32)(((FLOAT64)x1r * W1) + ((FLOAT64)x1i * W4)); |
| x1i = (FLOAT32)(-((FLOAT64)x1r * W4) + (FLOAT64)x1i * W1); |
| x1r = tmp; |
| |
| *ptr_y = (x0r) - (x1r); |
| *(ptr_y + 1) = (x0i) - (x1i); |
| ptr_y -= (del << 1); |
| |
| *ptr_y = (x0r) + (x1r); |
| *(ptr_y + 1) = (x0i) + (x1i); |
| ptr_y += 2; |
| } |
| twiddles = ptr_w; |
| for (j = del / 2; j != 0; j--) { |
| FLOAT64 W1 = *twiddles; |
| FLOAT64 W4 = *(twiddles + 257); |
| FLOAT32 tmp; |
| twiddles += nodespacing; |
| |
| x0r = *ptr_y; |
| x0i = *(ptr_y + 1); |
| ptr_y += (del << 1); |
| |
| x1r = *ptr_y; |
| x1i = *(ptr_y + 1); |
| |
| tmp = (FLOAT32)(((FLOAT64)x1r * W4) - ((FLOAT64)x1i * W1)); |
| x1i = (FLOAT32)(((FLOAT64)x1r * W1) + ((FLOAT64)x1i * W4)); |
| x1r = tmp; |
| |
| *ptr_y = (x0r) - (x1r); |
| *(ptr_y + 1) = (x0i) - (x1i); |
| ptr_y -= (del << 1); |
| |
| *ptr_y = (x0r) + (x1r); |
| *(ptr_y + 1) = (x0i) + (x1i); |
| ptr_y += 2; |
| } |
| } |
| } |
| |
| for (i = 0; i < n_pass; i++) { |
| re[2 * i + 0] = y[2 * i + 0]; |
| re[2 * i + 1] = y[2 * i + 1]; |
| } |
| } |
| |
| VOID ixheaacd_hbe_apply_cfftn_gen(FLOAT32 re[], FLOAT32 *scratch, WORD32 n_pass, |
| WORD32 i_sign) { |
| WORD32 i, j; |
| WORD32 m_points = n_pass; |
| FLOAT32 *x, *y, *re3; |
| FLOAT32 *ptr_x, *ptr_y; |
| ptr_x = x = scratch; |
| scratch += 2 * m_points; |
| ptr_y = y = scratch; |
| scratch += 4 * m_points; |
| re3 = scratch; |
| scratch += 2 * m_points; |
| WORD32 cnfac; |
| WORD32 mpass = n_pass; |
| |
| cnfac = 0; |
| while (mpass % 3 == 0) { |
| mpass /= 3; |
| cnfac++; |
| } |
| |
| for (i = 0; i < 3 * cnfac; i++) { |
| for (j = 0; j < mpass; j++) { |
| re3[2 * j + 0] = re[6 * j + 2 * i + 0]; |
| re3[2 * j + 1] = re[6 * j + 2 * i + 1]; |
| } |
| |
| ixheaacd_hbe_apply_cfftn(re3, scratch, mpass, i_sign); |
| |
| for (j = 0; j < mpass; j++) { |
| re[6 * j + 2 * i + 0] = re3[2 * j + 0]; |
| re[6 * j + 2 * i + 1] = re3[2 * j + 1]; |
| } |
| } |
| |
| { |
| FLOAT64 *w1r, *w1i; |
| FLOAT32 tmp; |
| w1r = (FLOAT64 *)ixheaac_twid_tbl_fft_ntwt3r; |
| w1i = (FLOAT64 *)ixheaac_twid_tbl_fft_ntwt3i; |
| |
| if (i_sign < 0) { |
| |
| for (i = 0; i < n_pass; i += 3) { |
| tmp = (FLOAT32)((FLOAT64)re[2 * i + 0] * (*w1r) - (FLOAT64)re[2 * i + 1] * (*w1i)); |
| re[2 * i + 1] = |
| (FLOAT32)((FLOAT64)re[2 * i + 0] * (*w1i) + (FLOAT64)re[2 * i + 1] * (*w1r)); |
| re[2 * i + 0] = tmp; |
| |
| w1r++; |
| w1i++; |
| |
| tmp = (FLOAT32)((FLOAT64)re[2 * i + 2] * (*w1r) - (FLOAT64)re[2 * i + 3] * (*w1i)); |
| re[2 * i + 3] = |
| (FLOAT32)((FLOAT64)re[2 * i + 2] * (*w1i) + (FLOAT64)re[2 * i + 3] * (*w1r)); |
| re[2 * i + 2] = tmp; |
| |
| w1r++; |
| w1i++; |
| |
| tmp = (FLOAT32)((FLOAT64)re[2 * i + 4] * (*w1r) - (FLOAT64)re[2 * i + 5] * (*w1i)); |
| re[2 * i + 5] = |
| (FLOAT32)((FLOAT64)re[2 * i + 4] * (*w1i) + (FLOAT64)re[2 * i + 5] * (*w1r)); |
| re[2 * i + 4] = tmp; |
| |
| w1r += 3 * (128 / mpass - 1) + 1; |
| w1i += 3 * (128 / mpass - 1) + 1; |
| } |
| } else { |
| for (i = 0; i < n_pass; i += 3) { |
| tmp = (FLOAT32)((FLOAT64)re[2 * i + 0] * (*w1r) + (FLOAT64)re[2 * i + 1] * (*w1i)); |
| re[2 * i + 1] = |
| (FLOAT32)(-(FLOAT64)re[2 * i + 0] * (*w1i) + (FLOAT64)re[2 * i + 1] * (*w1r)); |
| re[2 * i + 0] = tmp; |
| |
| w1r++; |
| w1i++; |
| |
| tmp = (FLOAT32)((FLOAT64)re[2 * i + 2] * (*w1r) + (FLOAT64)re[2 * i + 3] * (*w1i)); |
| re[2 * i + 3] = |
| (FLOAT32)(-(FLOAT64)re[2 * i + 2] * (*w1i) + (FLOAT64)re[2 * i + 3] * (*w1r)); |
| re[2 * i + 2] = tmp; |
| |
| w1r++; |
| w1i++; |
| |
| tmp = (FLOAT32)((FLOAT64)re[2 * i + 4] * (*w1r) + (FLOAT64)re[2 * i + 5] * (*w1i)); |
| re[2 * i + 5] = |
| (FLOAT32)(-(FLOAT64)re[2 * i + 4] * (*w1i) + (FLOAT64)re[2 * i + 5] * (*w1r)); |
| re[2 * i + 4] = tmp; |
| |
| w1r += 3 * (128 / mpass - 1) + 1; |
| w1i += 3 * (128 / mpass - 1) + 1; |
| } |
| } |
| } |
| |
| for (i = 0; i < n_pass; i++) { |
| ptr_x[2 * i + 0] = re[2 * i + 0]; |
| ptr_x[2 * i + 1] = re[2 * i + 1]; |
| } |
| for (i = 0; i < mpass; i++) { |
| ixheaacd_hbe_apply_fft_3(ptr_x, ptr_y, i_sign); |
| |
| ptr_x = ptr_x + 6; |
| ptr_y = ptr_y + 6; |
| } |
| |
| for (i = 0; i < mpass; i++) { |
| re[2 * i + 0] = y[6 * i + 0]; |
| re[2 * i + 1] = y[6 * i + 1]; |
| } |
| |
| for (i = 0; i < mpass; i++) { |
| re[2 * mpass + 2 * i + 0] = y[6 * i + 2]; |
| re[2 * mpass + 2 * i + 1] = y[6 * i + 3]; |
| } |
| |
| for (i = 0; i < mpass; i++) { |
| re[4 * mpass + 2 * i + 0] = y[6 * i + 4]; |
| re[4 * mpass + 2 * i + 1] = y[6 * i + 5]; |
| } |
| } |
| |
| VOID ixheaacd_hbe_apply_fft_288(FLOAT32 *inp, FLOAT32 *scratch, WORD32 len, WORD32 i_sign) { |
| FLOAT32 *op = scratch; |
| WORD32 mpoints = len / 96; |
| WORD32 fpoints = len / 3; |
| WORD32 ii, jj; |
| scratch += 2 * len; |
| |
| for (ii = 0; ii < mpoints; ii++) { |
| for (jj = 0; jj < fpoints; jj++) { |
| op[2 * jj + 0] = inp[2 * mpoints * jj + 2 * ii]; |
| op[2 * jj + 1] = inp[2 * mpoints * jj + 2 * ii + 1]; |
| } |
| |
| if (fpoints & (fpoints - 1)) |
| ixheaacd_hbe_apply_cfftn_gen(op, scratch, fpoints, i_sign); |
| else |
| ixheaacd_hbe_apply_cfftn(op, scratch, fpoints, i_sign); |
| |
| for (jj = 0; jj < fpoints; jj++) { |
| inp[mpoints * 2 * jj + 2 * ii + 0] = op[2 * jj + 0]; |
| inp[mpoints * 2 * jj + 2 * ii + 1] = op[2 * jj + 1]; |
| } |
| } |
| |
| ixheaacd_hbe_apply_tw_mult_fft(inp, op, fpoints, mpoints, ixheaac_twid_tbl_fft_288); |
| |
| for (ii = 0; ii < fpoints; ii++) { |
| ixheaacd_hbe_apply_fft_3(op, scratch, i_sign); |
| op = op + (mpoints * 2); |
| scratch = scratch + (mpoints * 2); |
| } |
| |
| scratch -= fpoints * mpoints * 2; |
| |
| for (jj = 0; jj < fpoints; jj++) { |
| inp[2 * jj + 0] = scratch[6 * jj]; |
| inp[2 * jj + 1] = scratch[6 * jj + 1]; |
| } |
| for (jj = 0; jj < fpoints; jj++) { |
| inp[2 * fpoints + 2 * jj + 0] = scratch[6 * jj + 2]; |
| inp[2 * fpoints + 2 * jj + 1] = scratch[6 * jj + 3]; |
| } |
| for (jj = 0; jj < fpoints; jj++) { |
| inp[4 * fpoints + 2 * jj + 0] = scratch[6 * jj + 4]; |
| inp[4 * fpoints + 2 * jj + 1] = scratch[6 * jj + 5]; |
| } |
| } |
| |
| VOID ixheaacd_hbe_apply_ifft_224(FLOAT32 *inp, FLOAT32 *scratch, WORD32 len, WORD32 i_sign) { |
| WORD32 mpoints = len / 32; |
| WORD32 fpoints = len / 7; |
| WORD32 ii, jj; |
| FLOAT32 *op = scratch; |
| scratch += 2 * len; |
| |
| for (ii = 0; ii < mpoints; ii++) { |
| for (jj = 0; jj < fpoints; jj++) { |
| op[2 * jj + 0] = inp[2 * mpoints * jj + 2 * ii]; |
| op[2 * jj + 1] = inp[2 * mpoints * jj + 2 * ii + 1]; |
| } |
| |
| if (fpoints & (fpoints - 1)) |
| ixheaacd_hbe_apply_cfftn_gen(op, scratch, fpoints, i_sign); |
| else |
| ixheaacd_hbe_apply_cfftn(op, scratch, fpoints, i_sign); |
| |
| for (jj = 0; jj < fpoints; jj++) { |
| inp[mpoints * 2 * jj + 2 * ii + 0] = op[2 * jj + 0]; |
| inp[mpoints * 2 * jj + 2 * ii + 1] = op[2 * jj + 1]; |
| } |
| } |
| |
| ixheaacd_hbe_apply_tw_mult_ifft(inp, op, fpoints, mpoints, ixheaac_twid_tbl_fft_224); |
| |
| for (ii = 0; ii < fpoints; ii++) { |
| ixheaacd_hbe_apply_ifft_7(op, scratch); |
| scratch += (mpoints * 2); |
| op += (mpoints * 2); |
| } |
| |
| scratch -= fpoints * mpoints * 2; |
| |
| for (jj = 0; jj < fpoints; jj++) { |
| for (ii = 0; ii < mpoints; ii++) { |
| inp[fpoints * ii * 2 + 2 * jj + 0] = scratch[mpoints * jj * 2 + 2 * ii + 0]; |
| inp[fpoints * ii * 2 + 2 * jj + 1] = scratch[mpoints * jj * 2 + 2 * ii + 1]; |
| } |
| } |
| } |
| |
| VOID ixheaacd_hbe_apply_ifft_336(FLOAT32 *inp, FLOAT32 *ptr_scratch, WORD32 len, |
| WORD32 i_sign) { |
| WORD32 i, j; |
| WORD32 m_points = len / 7; |
| WORD32 n_points = len / 48; |
| FLOAT32 *ptr_real, *ptr_imag, *p_real_1, *p_scratch; |
| ptr_real = ptr_scratch; |
| ptr_scratch += 2 * len; |
| ptr_imag = ptr_scratch; |
| ptr_scratch += len; |
| p_scratch = ptr_scratch; |
| ptr_scratch += len; |
| p_real_1 = ptr_scratch; |
| ptr_scratch += len; |
| |
| for (i = 0; i < len; i++) { |
| ptr_real[i] = inp[2 * i + 0]; |
| ptr_imag[i] = inp[2 * i + 1]; |
| } |
| |
| for (i = 0; i < m_points; i++) { |
| for (j = 0; j < n_points; j++) { |
| p_real_1[2 * j + 0] = inp[m_points * 2 * j + 2 * i + 0]; |
| p_real_1[2 * j + 1] = inp[m_points * 2 * j + 2 * i + 1]; |
| } |
| |
| ixheaacd_hbe_apply_ifft_7(p_real_1, ptr_scratch); |
| |
| for (j = 0; j < n_points; j++) { |
| inp[m_points * 2 * j + 2 * i + 0] = ptr_scratch[2 * j + 0]; |
| inp[m_points * 2 * j + 2 * i + 1] = ptr_scratch[2 * j + 1]; |
| } |
| } |
| |
| if (m_points == 48) |
| ixheaacd_hbe_apply_tw_mult_ifft(inp, p_scratch, n_points, m_points, |
| ixheaac_twid_tbl_fft_336); |
| else |
| ixheaacd_hbe_apply_tw_mult_ifft(inp, p_scratch, n_points, m_points, |
| ixheaac_twid_tbl_fft_168); |
| |
| for (i = 0; i < len; i++) { |
| ptr_real[2 * i + 0] = p_scratch[2 * i + 0]; |
| ptr_real[2 * i + 1] = p_scratch[2 * i + 1]; |
| } |
| |
| for (i = 0; i < n_points; i++) { |
| ixheaacd_hbe_apply_cfftn_gen(ptr_real, ptr_scratch, m_points, i_sign); |
| ptr_real += (2 * m_points); |
| } |
| |
| ptr_real -= n_points * 2 * m_points; |
| |
| for (j = 0; j < n_points; j++) { |
| for (i = 0; i < m_points; i++) { |
| inp[n_points * 2 * i + 2 * j + 0] = ptr_real[2 * m_points * j + 2 * i + 0]; |
| inp[n_points * 2 * i + 2 * j + 1] = ptr_real[2 * m_points * j + 2 * i + 1]; |
| } |
| } |
| return; |
| } |
| |
