/****************************************************************************** * * * 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 #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; }