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https://github.com/FFmpeg/FFmpeg.git
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c42a89309a
Fixes: signed integer overflow: -1364715454 + -1468954671 cannot be represented in type 'int' Fixes: 62093/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AAC_FIXED_fuzzer-5538774254485504 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
2214 lines
89 KiB
C
2214 lines
89 KiB
C
/*
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* Copyright (c) Lynne
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*
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* Power of two FFT:
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* Copyright (c) Lynne
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* Copyright (c) 2008 Loren Merritt
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* Copyright (c) 2002 Fabrice Bellard
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* Partly based on libdjbfft by D. J. Bernstein
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#define TABLE_DEF(name, size) \
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DECLARE_ALIGNED(32, TXSample, TX_TAB(ff_tx_tab_ ##name))[size]
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#define SR_POW2_TABLES \
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SR_TABLE(8) \
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SR_TABLE(16) \
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SR_TABLE(32) \
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SR_TABLE(64) \
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SR_TABLE(128) \
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SR_TABLE(256) \
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SR_TABLE(512) \
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SR_TABLE(1024) \
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SR_TABLE(2048) \
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SR_TABLE(4096) \
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SR_TABLE(8192) \
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SR_TABLE(16384) \
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SR_TABLE(32768) \
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SR_TABLE(65536) \
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SR_TABLE(131072) \
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SR_TABLE(262144) \
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SR_TABLE(524288) \
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SR_TABLE(1048576) \
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SR_TABLE(2097152) \
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#define SR_TABLE(len) \
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TABLE_DEF(len, len/4 + 1);
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/* Power of two tables */
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SR_POW2_TABLES
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#undef SR_TABLE
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/* Other factors' tables */
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TABLE_DEF(53, 12);
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TABLE_DEF( 7, 6);
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TABLE_DEF( 9, 8);
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typedef struct FFTabInitData {
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void (*func)(void);
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int factors[TX_MAX_SUB]; /* Must be sorted high -> low */
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} FFTabInitData;
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#define SR_TABLE(len) \
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static av_cold void TX_TAB(ff_tx_init_tab_ ##len)(void) \
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{ \
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double freq = 2*M_PI/len; \
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TXSample *tab = TX_TAB(ff_tx_tab_ ##len); \
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\
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for (int i = 0; i < len/4; i++) \
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*tab++ = RESCALE(cos(i*freq)); \
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\
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*tab = 0; \
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}
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SR_POW2_TABLES
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#undef SR_TABLE
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static void (*const sr_tabs_init_funcs[])(void) = {
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#define SR_TABLE(len) TX_TAB(ff_tx_init_tab_ ##len),
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SR_POW2_TABLES
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#undef SR_TABLE
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};
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static AVOnce sr_tabs_init_once[] = {
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#define SR_TABLE(len) AV_ONCE_INIT,
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SR_POW2_TABLES
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#undef SR_TABLE
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};
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static av_cold void TX_TAB(ff_tx_init_tab_53)(void)
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{
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/* 5pt, doubled to eliminate AVX lane shuffles */
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TX_TAB(ff_tx_tab_53)[0] = RESCALE(cos(2 * M_PI / 5));
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TX_TAB(ff_tx_tab_53)[1] = RESCALE(cos(2 * M_PI / 5));
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TX_TAB(ff_tx_tab_53)[2] = RESCALE(cos(2 * M_PI / 10));
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TX_TAB(ff_tx_tab_53)[3] = RESCALE(cos(2 * M_PI / 10));
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TX_TAB(ff_tx_tab_53)[4] = RESCALE(sin(2 * M_PI / 5));
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TX_TAB(ff_tx_tab_53)[5] = RESCALE(sin(2 * M_PI / 5));
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TX_TAB(ff_tx_tab_53)[6] = RESCALE(sin(2 * M_PI / 10));
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TX_TAB(ff_tx_tab_53)[7] = RESCALE(sin(2 * M_PI / 10));
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/* 3pt */
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TX_TAB(ff_tx_tab_53)[ 8] = RESCALE(cos(2 * M_PI / 12));
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TX_TAB(ff_tx_tab_53)[ 9] = RESCALE(cos(2 * M_PI / 12));
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TX_TAB(ff_tx_tab_53)[10] = RESCALE(cos(2 * M_PI / 6));
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TX_TAB(ff_tx_tab_53)[11] = RESCALE(cos(8 * M_PI / 6));
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}
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static av_cold void TX_TAB(ff_tx_init_tab_7)(void)
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{
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TX_TAB(ff_tx_tab_7)[0] = RESCALE(cos(2 * M_PI / 7));
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TX_TAB(ff_tx_tab_7)[1] = RESCALE(sin(2 * M_PI / 7));
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TX_TAB(ff_tx_tab_7)[2] = RESCALE(sin(2 * M_PI / 28));
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TX_TAB(ff_tx_tab_7)[3] = RESCALE(cos(2 * M_PI / 28));
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TX_TAB(ff_tx_tab_7)[4] = RESCALE(cos(2 * M_PI / 14));
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TX_TAB(ff_tx_tab_7)[5] = RESCALE(sin(2 * M_PI / 14));
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}
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static av_cold void TX_TAB(ff_tx_init_tab_9)(void)
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{
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TX_TAB(ff_tx_tab_9)[0] = RESCALE(cos(2 * M_PI / 3));
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TX_TAB(ff_tx_tab_9)[1] = RESCALE(sin(2 * M_PI / 3));
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TX_TAB(ff_tx_tab_9)[2] = RESCALE(cos(2 * M_PI / 9));
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TX_TAB(ff_tx_tab_9)[3] = RESCALE(sin(2 * M_PI / 9));
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TX_TAB(ff_tx_tab_9)[4] = RESCALE(cos(2 * M_PI / 36));
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TX_TAB(ff_tx_tab_9)[5] = RESCALE(sin(2 * M_PI / 36));
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TX_TAB(ff_tx_tab_9)[6] = TX_TAB(ff_tx_tab_9)[2] + TX_TAB(ff_tx_tab_9)[5];
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TX_TAB(ff_tx_tab_9)[7] = TX_TAB(ff_tx_tab_9)[3] - TX_TAB(ff_tx_tab_9)[4];
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}
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static const FFTabInitData nptwo_tabs_init_data[] = {
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{ TX_TAB(ff_tx_init_tab_53), { 15, 5, 3 } },
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{ TX_TAB(ff_tx_init_tab_9), { 9 } },
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{ TX_TAB(ff_tx_init_tab_7), { 7 } },
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};
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static AVOnce nptwo_tabs_init_once[] = {
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AV_ONCE_INIT,
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AV_ONCE_INIT,
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AV_ONCE_INIT,
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};
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av_cold void TX_TAB(ff_tx_init_tabs)(int len)
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{
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int factor_2 = ff_ctz(len);
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if (factor_2) {
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int idx = factor_2 - 3;
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for (int i = 0; i <= idx; i++)
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ff_thread_once(&sr_tabs_init_once[i],
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sr_tabs_init_funcs[i]);
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len >>= factor_2;
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}
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for (int i = 0; i < FF_ARRAY_ELEMS(nptwo_tabs_init_data); i++) {
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int f, f_idx = 0;
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if (len <= 1)
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return;
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while ((f = nptwo_tabs_init_data[i].factors[f_idx++])) {
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if (f % len)
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continue;
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ff_thread_once(&nptwo_tabs_init_once[i],
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nptwo_tabs_init_data[i].func);
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len /= f;
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break;
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}
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}
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}
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static av_always_inline void fft3(TXComplex *out, TXComplex *in,
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ptrdiff_t stride)
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{
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TXComplex tmp[3];
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const TXSample *tab = TX_TAB(ff_tx_tab_53);
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#ifdef TX_INT32
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int64_t mtmp[4];
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#endif
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tmp[0] = in[0];
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BF(tmp[1].re, tmp[2].im, in[1].im, in[2].im);
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BF(tmp[1].im, tmp[2].re, in[1].re, in[2].re);
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out[0*stride].re = tmp[0].re + tmp[2].re;
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out[0*stride].im = tmp[0].im + tmp[2].im;
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#ifdef TX_INT32
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mtmp[0] = (int64_t)tab[ 8] * tmp[1].re;
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mtmp[1] = (int64_t)tab[ 9] * tmp[1].im;
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mtmp[2] = (int64_t)tab[10] * tmp[2].re;
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mtmp[3] = (int64_t)tab[10] * tmp[2].im;
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out[1*stride].re = tmp[0].re - (mtmp[2] + mtmp[0] + 0x40000000 >> 31);
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out[1*stride].im = tmp[0].im - (mtmp[3] - mtmp[1] + 0x40000000 >> 31);
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out[2*stride].re = tmp[0].re - (mtmp[2] - mtmp[0] + 0x40000000 >> 31);
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out[2*stride].im = tmp[0].im - (mtmp[3] + mtmp[1] + 0x40000000 >> 31);
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#else
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tmp[1].re = tab[ 8] * tmp[1].re;
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tmp[1].im = tab[ 9] * tmp[1].im;
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tmp[2].re = tab[10] * tmp[2].re;
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tmp[2].im = tab[10] * tmp[2].im;
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out[1*stride].re = tmp[0].re - tmp[2].re + tmp[1].re;
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out[1*stride].im = tmp[0].im - tmp[2].im - tmp[1].im;
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out[2*stride].re = tmp[0].re - tmp[2].re - tmp[1].re;
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out[2*stride].im = tmp[0].im - tmp[2].im + tmp[1].im;
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#endif
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}
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#define DECL_FFT5(NAME, D0, D1, D2, D3, D4) \
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static av_always_inline void NAME(TXComplex *out, TXComplex *in, \
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ptrdiff_t stride) \
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{ \
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TXComplex dc, z0[4], t[6]; \
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const TXSample *tab = TX_TAB(ff_tx_tab_53); \
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\
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dc = in[0]; \
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BF(t[1].im, t[0].re, in[1].re, in[4].re); \
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BF(t[1].re, t[0].im, in[1].im, in[4].im); \
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BF(t[3].im, t[2].re, in[2].re, in[3].re); \
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BF(t[3].re, t[2].im, in[2].im, in[3].im); \
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\
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out[D0*stride].re = dc.re + (TXUSample)t[0].re + t[2].re; \
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out[D0*stride].im = dc.im + (TXUSample)t[0].im + t[2].im; \
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\
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SMUL(t[4].re, t[0].re, tab[0], tab[2], t[2].re, t[0].re); \
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SMUL(t[4].im, t[0].im, tab[0], tab[2], t[2].im, t[0].im); \
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CMUL(t[5].re, t[1].re, tab[4], tab[6], t[3].re, t[1].re); \
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CMUL(t[5].im, t[1].im, tab[4], tab[6], t[3].im, t[1].im); \
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\
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BF(z0[0].re, z0[3].re, t[0].re, t[1].re); \
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BF(z0[0].im, z0[3].im, t[0].im, t[1].im); \
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BF(z0[2].re, z0[1].re, t[4].re, t[5].re); \
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BF(z0[2].im, z0[1].im, t[4].im, t[5].im); \
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\
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out[D1*stride].re = dc.re + (TXUSample)z0[3].re; \
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out[D1*stride].im = dc.im + (TXUSample)z0[0].im; \
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out[D2*stride].re = dc.re + (TXUSample)z0[2].re; \
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out[D2*stride].im = dc.im + (TXUSample)z0[1].im; \
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out[D3*stride].re = dc.re + (TXUSample)z0[1].re; \
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out[D3*stride].im = dc.im + (TXUSample)z0[2].im; \
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out[D4*stride].re = dc.re + (TXUSample)z0[0].re; \
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out[D4*stride].im = dc.im + (TXUSample)z0[3].im; \
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}
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DECL_FFT5(fft5, 0, 1, 2, 3, 4)
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DECL_FFT5(fft5_m1, 0, 6, 12, 3, 9)
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DECL_FFT5(fft5_m2, 10, 1, 7, 13, 4)
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DECL_FFT5(fft5_m3, 5, 11, 2, 8, 14)
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static av_always_inline void fft7(TXComplex *out, TXComplex *in,
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ptrdiff_t stride)
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{
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TXComplex dc, t[6], z[3];
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const TXComplex *tab = (const TXComplex *)TX_TAB(ff_tx_tab_7);
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#ifdef TX_INT32
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int64_t mtmp[12];
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#endif
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dc = in[0];
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BF(t[1].re, t[0].re, in[1].re, in[6].re);
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BF(t[1].im, t[0].im, in[1].im, in[6].im);
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BF(t[3].re, t[2].re, in[2].re, in[5].re);
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BF(t[3].im, t[2].im, in[2].im, in[5].im);
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BF(t[5].re, t[4].re, in[3].re, in[4].re);
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BF(t[5].im, t[4].im, in[3].im, in[4].im);
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out[0*stride].re = dc.re + t[0].re + t[2].re + t[4].re;
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out[0*stride].im = dc.im + t[0].im + t[2].im + t[4].im;
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#ifdef TX_INT32 /* NOTE: it's possible to do this with 16 mults but 72 adds */
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mtmp[ 0] = ((int64_t)tab[0].re)*t[0].re - ((int64_t)tab[2].re)*t[4].re;
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mtmp[ 1] = ((int64_t)tab[0].re)*t[4].re - ((int64_t)tab[1].re)*t[0].re;
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mtmp[ 2] = ((int64_t)tab[0].re)*t[2].re - ((int64_t)tab[2].re)*t[0].re;
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mtmp[ 3] = ((int64_t)tab[0].re)*t[0].im - ((int64_t)tab[1].re)*t[2].im;
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mtmp[ 4] = ((int64_t)tab[0].re)*t[4].im - ((int64_t)tab[1].re)*t[0].im;
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mtmp[ 5] = ((int64_t)tab[0].re)*t[2].im - ((int64_t)tab[2].re)*t[0].im;
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mtmp[ 6] = ((int64_t)tab[2].im)*t[1].im + ((int64_t)tab[1].im)*t[5].im;
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mtmp[ 7] = ((int64_t)tab[0].im)*t[5].im + ((int64_t)tab[2].im)*t[3].im;
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mtmp[ 8] = ((int64_t)tab[2].im)*t[5].im + ((int64_t)tab[1].im)*t[3].im;
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mtmp[ 9] = ((int64_t)tab[0].im)*t[1].re + ((int64_t)tab[1].im)*t[3].re;
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mtmp[10] = ((int64_t)tab[2].im)*t[3].re + ((int64_t)tab[0].im)*t[5].re;
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mtmp[11] = ((int64_t)tab[2].im)*t[1].re + ((int64_t)tab[1].im)*t[5].re;
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z[0].re = (int32_t)(mtmp[ 0] - ((int64_t)tab[1].re)*t[2].re + 0x40000000 >> 31);
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z[1].re = (int32_t)(mtmp[ 1] - ((int64_t)tab[2].re)*t[2].re + 0x40000000 >> 31);
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z[2].re = (int32_t)(mtmp[ 2] - ((int64_t)tab[1].re)*t[4].re + 0x40000000 >> 31);
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z[0].im = (int32_t)(mtmp[ 3] - ((int64_t)tab[2].re)*t[4].im + 0x40000000 >> 31);
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z[1].im = (int32_t)(mtmp[ 4] - ((int64_t)tab[2].re)*t[2].im + 0x40000000 >> 31);
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z[2].im = (int32_t)(mtmp[ 5] - ((int64_t)tab[1].re)*t[4].im + 0x40000000 >> 31);
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t[0].re = (int32_t)(mtmp[ 6] - ((int64_t)tab[0].im)*t[3].im + 0x40000000 >> 31);
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t[2].re = (int32_t)(mtmp[ 7] - ((int64_t)tab[1].im)*t[1].im + 0x40000000 >> 31);
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t[4].re = (int32_t)(mtmp[ 8] + ((int64_t)tab[0].im)*t[1].im + 0x40000000 >> 31);
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t[0].im = (int32_t)(mtmp[ 9] + ((int64_t)tab[2].im)*t[5].re + 0x40000000 >> 31);
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t[2].im = (int32_t)(mtmp[10] - ((int64_t)tab[1].im)*t[1].re + 0x40000000 >> 31);
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t[4].im = (int32_t)(mtmp[11] - ((int64_t)tab[0].im)*t[3].re + 0x40000000 >> 31);
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#else
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z[0].re = tab[0].re*t[0].re - tab[2].re*t[4].re - tab[1].re*t[2].re;
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z[1].re = tab[0].re*t[4].re - tab[1].re*t[0].re - tab[2].re*t[2].re;
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z[2].re = tab[0].re*t[2].re - tab[2].re*t[0].re - tab[1].re*t[4].re;
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z[0].im = tab[0].re*t[0].im - tab[1].re*t[2].im - tab[2].re*t[4].im;
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z[1].im = tab[0].re*t[4].im - tab[1].re*t[0].im - tab[2].re*t[2].im;
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z[2].im = tab[0].re*t[2].im - tab[2].re*t[0].im - tab[1].re*t[4].im;
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/* It's possible to do t[4].re and t[0].im with 2 multiplies only by
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* multiplying the sum of all with the average of the twiddles */
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t[0].re = tab[2].im*t[1].im + tab[1].im*t[5].im - tab[0].im*t[3].im;
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t[2].re = tab[0].im*t[5].im + tab[2].im*t[3].im - tab[1].im*t[1].im;
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t[4].re = tab[2].im*t[5].im + tab[1].im*t[3].im + tab[0].im*t[1].im;
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t[0].im = tab[0].im*t[1].re + tab[1].im*t[3].re + tab[2].im*t[5].re;
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t[2].im = tab[2].im*t[3].re + tab[0].im*t[5].re - tab[1].im*t[1].re;
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t[4].im = tab[2].im*t[1].re + tab[1].im*t[5].re - tab[0].im*t[3].re;
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#endif
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BF(t[1].re, z[0].re, z[0].re, t[4].re);
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BF(t[3].re, z[1].re, z[1].re, t[2].re);
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BF(t[5].re, z[2].re, z[2].re, t[0].re);
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BF(t[1].im, z[0].im, z[0].im, t[0].im);
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BF(t[3].im, z[1].im, z[1].im, t[2].im);
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BF(t[5].im, z[2].im, z[2].im, t[4].im);
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out[1*stride].re = dc.re + z[0].re;
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out[1*stride].im = dc.im + t[1].im;
|
|
out[2*stride].re = dc.re + t[3].re;
|
|
out[2*stride].im = dc.im + z[1].im;
|
|
out[3*stride].re = dc.re + z[2].re;
|
|
out[3*stride].im = dc.im + t[5].im;
|
|
out[4*stride].re = dc.re + t[5].re;
|
|
out[4*stride].im = dc.im + z[2].im;
|
|
out[5*stride].re = dc.re + z[1].re;
|
|
out[5*stride].im = dc.im + t[3].im;
|
|
out[6*stride].re = dc.re + t[1].re;
|
|
out[6*stride].im = dc.im + z[0].im;
|
|
}
|
|
|
|
static av_always_inline void fft9(TXComplex *out, TXComplex *in,
|
|
ptrdiff_t stride)
|
|
{
|
|
const TXComplex *tab = (const TXComplex *)TX_TAB(ff_tx_tab_9);
|
|
TXComplex dc, t[16], w[4], x[5], y[5], z[2];
|
|
#ifdef TX_INT32
|
|
int64_t mtmp[12];
|
|
#endif
|
|
|
|
dc = in[0];
|
|
BF(t[1].re, t[0].re, in[1].re, in[8].re);
|
|
BF(t[1].im, t[0].im, in[1].im, in[8].im);
|
|
BF(t[3].re, t[2].re, in[2].re, in[7].re);
|
|
BF(t[3].im, t[2].im, in[2].im, in[7].im);
|
|
BF(t[5].re, t[4].re, in[3].re, in[6].re);
|
|
BF(t[5].im, t[4].im, in[3].im, in[6].im);
|
|
BF(t[7].re, t[6].re, in[4].re, in[5].re);
|
|
BF(t[7].im, t[6].im, in[4].im, in[5].im);
|
|
|
|
w[0].re = t[0].re - t[6].re;
|
|
w[0].im = t[0].im - t[6].im;
|
|
w[1].re = t[2].re - t[6].re;
|
|
w[1].im = t[2].im - t[6].im;
|
|
w[2].re = t[1].re - t[7].re;
|
|
w[2].im = t[1].im - t[7].im;
|
|
w[3].re = t[3].re + t[7].re;
|
|
w[3].im = t[3].im + t[7].im;
|
|
|
|
z[0].re = dc.re + t[4].re;
|
|
z[0].im = dc.im + t[4].im;
|
|
|
|
z[1].re = t[0].re + t[2].re + t[6].re;
|
|
z[1].im = t[0].im + t[2].im + t[6].im;
|
|
|
|
out[0*stride].re = z[0].re + z[1].re;
|
|
out[0*stride].im = z[0].im + z[1].im;
|
|
|
|
#ifdef TX_INT32
|
|
mtmp[0] = t[1].re - t[3].re + t[7].re;
|
|
mtmp[1] = t[1].im - t[3].im + t[7].im;
|
|
|
|
y[3].re = (int32_t)(((int64_t)tab[0].im)*mtmp[0] + 0x40000000 >> 31);
|
|
y[3].im = (int32_t)(((int64_t)tab[0].im)*mtmp[1] + 0x40000000 >> 31);
|
|
|
|
mtmp[0] = (int32_t)(((int64_t)tab[0].re)*z[1].re + 0x40000000 >> 31);
|
|
mtmp[1] = (int32_t)(((int64_t)tab[0].re)*z[1].im + 0x40000000 >> 31);
|
|
mtmp[2] = (int32_t)(((int64_t)tab[0].re)*t[4].re + 0x40000000 >> 31);
|
|
mtmp[3] = (int32_t)(((int64_t)tab[0].re)*t[4].im + 0x40000000 >> 31);
|
|
|
|
x[3].re = z[0].re + (int32_t)mtmp[0];
|
|
x[3].im = z[0].im + (int32_t)mtmp[1];
|
|
z[0].re = in[0].re + (int32_t)mtmp[2];
|
|
z[0].im = in[0].im + (int32_t)mtmp[3];
|
|
|
|
mtmp[0] = ((int64_t)tab[1].re)*w[0].re;
|
|
mtmp[1] = ((int64_t)tab[1].re)*w[0].im;
|
|
mtmp[2] = ((int64_t)tab[2].im)*w[0].re;
|
|
mtmp[3] = ((int64_t)tab[2].im)*w[0].im;
|
|
mtmp[4] = ((int64_t)tab[1].im)*w[2].re;
|
|
mtmp[5] = ((int64_t)tab[1].im)*w[2].im;
|
|
mtmp[6] = ((int64_t)tab[2].re)*w[2].re;
|
|
mtmp[7] = ((int64_t)tab[2].re)*w[2].im;
|
|
|
|
x[1].re = (int32_t)(mtmp[0] + ((int64_t)tab[2].im)*w[1].re + 0x40000000 >> 31);
|
|
x[1].im = (int32_t)(mtmp[1] + ((int64_t)tab[2].im)*w[1].im + 0x40000000 >> 31);
|
|
x[2].re = (int32_t)(mtmp[2] - ((int64_t)tab[3].re)*w[1].re + 0x40000000 >> 31);
|
|
x[2].im = (int32_t)(mtmp[3] - ((int64_t)tab[3].re)*w[1].im + 0x40000000 >> 31);
|
|
y[1].re = (int32_t)(mtmp[4] + ((int64_t)tab[2].re)*w[3].re + 0x40000000 >> 31);
|
|
y[1].im = (int32_t)(mtmp[5] + ((int64_t)tab[2].re)*w[3].im + 0x40000000 >> 31);
|
|
y[2].re = (int32_t)(mtmp[6] - ((int64_t)tab[3].im)*w[3].re + 0x40000000 >> 31);
|
|
y[2].im = (int32_t)(mtmp[7] - ((int64_t)tab[3].im)*w[3].im + 0x40000000 >> 31);
|
|
|
|
y[0].re = (int32_t)(((int64_t)tab[0].im)*t[5].re + 0x40000000 >> 31);
|
|
y[0].im = (int32_t)(((int64_t)tab[0].im)*t[5].im + 0x40000000 >> 31);
|
|
|
|
#else
|
|
y[3].re = tab[0].im*(t[1].re - t[3].re + t[7].re);
|
|
y[3].im = tab[0].im*(t[1].im - t[3].im + t[7].im);
|
|
|
|
x[3].re = z[0].re + tab[0].re*z[1].re;
|
|
x[3].im = z[0].im + tab[0].re*z[1].im;
|
|
z[0].re = dc.re + tab[0].re*t[4].re;
|
|
z[0].im = dc.im + tab[0].re*t[4].im;
|
|
|
|
x[1].re = tab[1].re*w[0].re + tab[2].im*w[1].re;
|
|
x[1].im = tab[1].re*w[0].im + tab[2].im*w[1].im;
|
|
x[2].re = tab[2].im*w[0].re - tab[3].re*w[1].re;
|
|
x[2].im = tab[2].im*w[0].im - tab[3].re*w[1].im;
|
|
y[1].re = tab[1].im*w[2].re + tab[2].re*w[3].re;
|
|
y[1].im = tab[1].im*w[2].im + tab[2].re*w[3].im;
|
|
y[2].re = tab[2].re*w[2].re - tab[3].im*w[3].re;
|
|
y[2].im = tab[2].re*w[2].im - tab[3].im*w[3].im;
|
|
|
|
y[0].re = tab[0].im*t[5].re;
|
|
y[0].im = tab[0].im*t[5].im;
|
|
#endif
|
|
|
|
x[4].re = x[1].re + x[2].re;
|
|
x[4].im = x[1].im + x[2].im;
|
|
|
|
y[4].re = y[1].re - y[2].re;
|
|
y[4].im = y[1].im - y[2].im;
|
|
x[1].re = z[0].re + x[1].re;
|
|
x[1].im = z[0].im + x[1].im;
|
|
y[1].re = y[0].re + y[1].re;
|
|
y[1].im = y[0].im + y[1].im;
|
|
x[2].re = z[0].re + x[2].re;
|
|
x[2].im = z[0].im + x[2].im;
|
|
y[2].re = y[2].re - y[0].re;
|
|
y[2].im = y[2].im - y[0].im;
|
|
x[4].re = z[0].re - x[4].re;
|
|
x[4].im = z[0].im - x[4].im;
|
|
y[4].re = y[0].re - y[4].re;
|
|
y[4].im = y[0].im - y[4].im;
|
|
|
|
out[1*stride] = (TXComplex){ x[1].re + y[1].im, x[1].im - y[1].re };
|
|
out[2*stride] = (TXComplex){ x[2].re + y[2].im, x[2].im - y[2].re };
|
|
out[3*stride] = (TXComplex){ x[3].re + y[3].im, x[3].im - y[3].re };
|
|
out[4*stride] = (TXComplex){ x[4].re + y[4].im, x[4].im - y[4].re };
|
|
out[5*stride] = (TXComplex){ x[4].re - y[4].im, x[4].im + y[4].re };
|
|
out[6*stride] = (TXComplex){ x[3].re - y[3].im, x[3].im + y[3].re };
|
|
out[7*stride] = (TXComplex){ x[2].re - y[2].im, x[2].im + y[2].re };
|
|
out[8*stride] = (TXComplex){ x[1].re - y[1].im, x[1].im + y[1].re };
|
|
}
|
|
|
|
static av_always_inline void fft15(TXComplex *out, TXComplex *in,
|
|
ptrdiff_t stride)
|
|
{
|
|
TXComplex tmp[15];
|
|
|
|
for (int i = 0; i < 5; i++)
|
|
fft3(tmp + i, in + i*3, 5);
|
|
|
|
fft5_m1(out, tmp + 0, stride);
|
|
fft5_m2(out, tmp + 5, stride);
|
|
fft5_m3(out, tmp + 10, stride);
|
|
}
|
|
|
|
static av_cold int TX_NAME(ff_tx_fft_factor_init)(AVTXContext *s,
|
|
const FFTXCodelet *cd,
|
|
uint64_t flags,
|
|
FFTXCodeletOptions *opts,
|
|
int len, int inv,
|
|
const void *scale)
|
|
{
|
|
int ret = 0;
|
|
TX_TAB(ff_tx_init_tabs)(len);
|
|
|
|
if (len == 15)
|
|
ret = ff_tx_gen_pfa_input_map(s, opts, 3, 5);
|
|
else if (flags & FF_TX_PRESHUFFLE)
|
|
ret = ff_tx_gen_default_map(s, opts);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#define DECL_FACTOR_S(n) \
|
|
static void TX_NAME(ff_tx_fft##n)(AVTXContext *s, void *dst, \
|
|
void *src, ptrdiff_t stride) \
|
|
{ \
|
|
fft##n((TXComplex *)dst, (TXComplex *)src, stride / sizeof(TXComplex)); \
|
|
} \
|
|
static const FFTXCodelet TX_NAME(ff_tx_fft##n##_ns_def) = { \
|
|
.name = TX_NAME_STR("fft" #n "_ns"), \
|
|
.function = TX_NAME(ff_tx_fft##n), \
|
|
.type = TX_TYPE(FFT), \
|
|
.flags = AV_TX_INPLACE | FF_TX_OUT_OF_PLACE | \
|
|
AV_TX_UNALIGNED | FF_TX_PRESHUFFLE, \
|
|
.factors[0] = n, \
|
|
.nb_factors = 1, \
|
|
.min_len = n, \
|
|
.max_len = n, \
|
|
.init = TX_NAME(ff_tx_fft_factor_init), \
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL, \
|
|
.prio = FF_TX_PRIO_BASE, \
|
|
};
|
|
|
|
#define DECL_FACTOR_F(n) \
|
|
DECL_FACTOR_S(n) \
|
|
static const FFTXCodelet TX_NAME(ff_tx_fft##n##_fwd_def) = { \
|
|
.name = TX_NAME_STR("fft" #n "_fwd"), \
|
|
.function = TX_NAME(ff_tx_fft##n), \
|
|
.type = TX_TYPE(FFT), \
|
|
.flags = AV_TX_INPLACE | FF_TX_OUT_OF_PLACE | \
|
|
AV_TX_UNALIGNED | FF_TX_FORWARD_ONLY, \
|
|
.factors[0] = n, \
|
|
.nb_factors = 1, \
|
|
.min_len = n, \
|
|
.max_len = n, \
|
|
.init = TX_NAME(ff_tx_fft_factor_init), \
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL, \
|
|
.prio = FF_TX_PRIO_BASE, \
|
|
};
|
|
|
|
DECL_FACTOR_F(3)
|
|
DECL_FACTOR_F(5)
|
|
DECL_FACTOR_F(7)
|
|
DECL_FACTOR_F(9)
|
|
DECL_FACTOR_S(15)
|
|
|
|
#define BUTTERFLIES(a0, a1, a2, a3) \
|
|
do { \
|
|
r0=a0.re; \
|
|
i0=a0.im; \
|
|
r1=a1.re; \
|
|
i1=a1.im; \
|
|
BF(t3, t5, t5, t1); \
|
|
BF(a2.re, a0.re, r0, t5); \
|
|
BF(a3.im, a1.im, i1, t3); \
|
|
BF(t4, t6, t2, t6); \
|
|
BF(a3.re, a1.re, r1, t4); \
|
|
BF(a2.im, a0.im, i0, t6); \
|
|
} while (0)
|
|
|
|
#define TRANSFORM(a0, a1, a2, a3, wre, wim) \
|
|
do { \
|
|
CMUL(t1, t2, a2.re, a2.im, wre, -wim); \
|
|
CMUL(t5, t6, a3.re, a3.im, wre, wim); \
|
|
BUTTERFLIES(a0, a1, a2, a3); \
|
|
} while (0)
|
|
|
|
/* z[0...8n-1], w[1...2n-1] */
|
|
static inline void TX_NAME(ff_tx_fft_sr_combine)(TXComplex *z,
|
|
const TXSample *cos, int len)
|
|
{
|
|
int o1 = 2*len;
|
|
int o2 = 4*len;
|
|
int o3 = 6*len;
|
|
const TXSample *wim = cos + o1 - 7;
|
|
TXUSample t1, t2, t3, t4, t5, t6, r0, i0, r1, i1;
|
|
|
|
for (int i = 0; i < len; i += 4) {
|
|
TRANSFORM(z[0], z[o1 + 0], z[o2 + 0], z[o3 + 0], cos[0], wim[7]);
|
|
TRANSFORM(z[2], z[o1 + 2], z[o2 + 2], z[o3 + 2], cos[2], wim[5]);
|
|
TRANSFORM(z[4], z[o1 + 4], z[o2 + 4], z[o3 + 4], cos[4], wim[3]);
|
|
TRANSFORM(z[6], z[o1 + 6], z[o2 + 6], z[o3 + 6], cos[6], wim[1]);
|
|
|
|
TRANSFORM(z[1], z[o1 + 1], z[o2 + 1], z[o3 + 1], cos[1], wim[6]);
|
|
TRANSFORM(z[3], z[o1 + 3], z[o2 + 3], z[o3 + 3], cos[3], wim[4]);
|
|
TRANSFORM(z[5], z[o1 + 5], z[o2 + 5], z[o3 + 5], cos[5], wim[2]);
|
|
TRANSFORM(z[7], z[o1 + 7], z[o2 + 7], z[o3 + 7], cos[7], wim[0]);
|
|
|
|
z += 2*4;
|
|
cos += 2*4;
|
|
wim -= 2*4;
|
|
}
|
|
}
|
|
|
|
static av_cold int TX_NAME(ff_tx_fft_sr_codelet_init)(AVTXContext *s,
|
|
const FFTXCodelet *cd,
|
|
uint64_t flags,
|
|
FFTXCodeletOptions *opts,
|
|
int len, int inv,
|
|
const void *scale)
|
|
{
|
|
TX_TAB(ff_tx_init_tabs)(len);
|
|
return ff_tx_gen_ptwo_revtab(s, opts);
|
|
}
|
|
|
|
#define DECL_SR_CODELET_DEF(n) \
|
|
static const FFTXCodelet TX_NAME(ff_tx_fft##n##_ns_def) = { \
|
|
.name = TX_NAME_STR("fft" #n "_ns"), \
|
|
.function = TX_NAME(ff_tx_fft##n##_ns), \
|
|
.type = TX_TYPE(FFT), \
|
|
.flags = FF_TX_OUT_OF_PLACE | AV_TX_INPLACE | \
|
|
AV_TX_UNALIGNED | FF_TX_PRESHUFFLE, \
|
|
.factors[0] = 2, \
|
|
.nb_factors = 1, \
|
|
.min_len = n, \
|
|
.max_len = n, \
|
|
.init = TX_NAME(ff_tx_fft_sr_codelet_init), \
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL, \
|
|
.prio = FF_TX_PRIO_BASE, \
|
|
};
|
|
|
|
#define DECL_SR_CODELET(n, n2, n4) \
|
|
static void TX_NAME(ff_tx_fft##n##_ns)(AVTXContext *s, void *_dst, \
|
|
void *_src, ptrdiff_t stride) \
|
|
{ \
|
|
TXComplex *src = _src; \
|
|
TXComplex *dst = _dst; \
|
|
const TXSample *cos = TX_TAB(ff_tx_tab_##n); \
|
|
\
|
|
TX_NAME(ff_tx_fft##n2##_ns)(s, dst, src, stride); \
|
|
TX_NAME(ff_tx_fft##n4##_ns)(s, dst + n4*2, src + n4*2, stride); \
|
|
TX_NAME(ff_tx_fft##n4##_ns)(s, dst + n4*3, src + n4*3, stride); \
|
|
TX_NAME(ff_tx_fft_sr_combine)(dst, cos, n4 >> 1); \
|
|
} \
|
|
\
|
|
DECL_SR_CODELET_DEF(n)
|
|
|
|
static void TX_NAME(ff_tx_fft2_ns)(AVTXContext *s, void *_dst,
|
|
void *_src, ptrdiff_t stride)
|
|
{
|
|
TXComplex *src = _src;
|
|
TXComplex *dst = _dst;
|
|
TXComplex tmp;
|
|
|
|
BF(tmp.re, dst[0].re, src[0].re, src[1].re);
|
|
BF(tmp.im, dst[0].im, src[0].im, src[1].im);
|
|
dst[1] = tmp;
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_fft4_ns)(AVTXContext *s, void *_dst,
|
|
void *_src, ptrdiff_t stride)
|
|
{
|
|
TXComplex *src = _src;
|
|
TXComplex *dst = _dst;
|
|
TXSample t1, t2, t3, t4, t5, t6, t7, t8;
|
|
|
|
BF(t3, t1, src[0].re, src[1].re);
|
|
BF(t8, t6, src[3].re, src[2].re);
|
|
BF(dst[2].re, dst[0].re, t1, t6);
|
|
BF(t4, t2, src[0].im, src[1].im);
|
|
BF(t7, t5, src[2].im, src[3].im);
|
|
BF(dst[3].im, dst[1].im, t4, t8);
|
|
BF(dst[3].re, dst[1].re, t3, t7);
|
|
BF(dst[2].im, dst[0].im, t2, t5);
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_fft8_ns)(AVTXContext *s, void *_dst,
|
|
void *_src, ptrdiff_t stride)
|
|
{
|
|
TXComplex *src = _src;
|
|
TXComplex *dst = _dst;
|
|
TXUSample t1, t2, t3, t4, t5, t6, r0, i0, r1, i1;
|
|
const TXSample cos = TX_TAB(ff_tx_tab_8)[1];
|
|
|
|
TX_NAME(ff_tx_fft4_ns)(s, dst, src, stride);
|
|
|
|
BF(t1, dst[5].re, src[4].re, -src[5].re);
|
|
BF(t2, dst[5].im, src[4].im, -src[5].im);
|
|
BF(t5, dst[7].re, src[6].re, -src[7].re);
|
|
BF(t6, dst[7].im, src[6].im, -src[7].im);
|
|
|
|
BUTTERFLIES(dst[0], dst[2], dst[4], dst[6]);
|
|
TRANSFORM(dst[1], dst[3], dst[5], dst[7], cos, cos);
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_fft16_ns)(AVTXContext *s, void *_dst,
|
|
void *_src, ptrdiff_t stride)
|
|
{
|
|
TXComplex *src = _src;
|
|
TXComplex *dst = _dst;
|
|
const TXSample *cos = TX_TAB(ff_tx_tab_16);
|
|
|
|
TXUSample t1, t2, t3, t4, t5, t6, r0, i0, r1, i1;
|
|
TXSample cos_16_1 = cos[1];
|
|
TXSample cos_16_2 = cos[2];
|
|
TXSample cos_16_3 = cos[3];
|
|
|
|
TX_NAME(ff_tx_fft8_ns)(s, dst + 0, src + 0, stride);
|
|
TX_NAME(ff_tx_fft4_ns)(s, dst + 8, src + 8, stride);
|
|
TX_NAME(ff_tx_fft4_ns)(s, dst + 12, src + 12, stride);
|
|
|
|
t1 = dst[ 8].re;
|
|
t2 = dst[ 8].im;
|
|
t5 = dst[12].re;
|
|
t6 = dst[12].im;
|
|
BUTTERFLIES(dst[0], dst[4], dst[8], dst[12]);
|
|
|
|
TRANSFORM(dst[ 2], dst[ 6], dst[10], dst[14], cos_16_2, cos_16_2);
|
|
TRANSFORM(dst[ 1], dst[ 5], dst[ 9], dst[13], cos_16_1, cos_16_3);
|
|
TRANSFORM(dst[ 3], dst[ 7], dst[11], dst[15], cos_16_3, cos_16_1);
|
|
}
|
|
|
|
DECL_SR_CODELET_DEF(2)
|
|
DECL_SR_CODELET_DEF(4)
|
|
DECL_SR_CODELET_DEF(8)
|
|
DECL_SR_CODELET_DEF(16)
|
|
DECL_SR_CODELET(32,16,8)
|
|
DECL_SR_CODELET(64,32,16)
|
|
DECL_SR_CODELET(128,64,32)
|
|
DECL_SR_CODELET(256,128,64)
|
|
DECL_SR_CODELET(512,256,128)
|
|
DECL_SR_CODELET(1024,512,256)
|
|
DECL_SR_CODELET(2048,1024,512)
|
|
DECL_SR_CODELET(4096,2048,1024)
|
|
DECL_SR_CODELET(8192,4096,2048)
|
|
DECL_SR_CODELET(16384,8192,4096)
|
|
DECL_SR_CODELET(32768,16384,8192)
|
|
DECL_SR_CODELET(65536,32768,16384)
|
|
DECL_SR_CODELET(131072,65536,32768)
|
|
DECL_SR_CODELET(262144,131072,65536)
|
|
DECL_SR_CODELET(524288,262144,131072)
|
|
DECL_SR_CODELET(1048576,524288,262144)
|
|
DECL_SR_CODELET(2097152,1048576,524288)
|
|
|
|
static av_cold int TX_NAME(ff_tx_fft_init)(AVTXContext *s,
|
|
const FFTXCodelet *cd,
|
|
uint64_t flags,
|
|
FFTXCodeletOptions *opts,
|
|
int len, int inv,
|
|
const void *scale)
|
|
{
|
|
int ret;
|
|
int is_inplace = !!(flags & AV_TX_INPLACE);
|
|
FFTXCodeletOptions sub_opts = {
|
|
.map_dir = is_inplace ? FF_TX_MAP_SCATTER : FF_TX_MAP_GATHER,
|
|
};
|
|
|
|
flags &= ~FF_TX_OUT_OF_PLACE; /* We want the subtransform to be */
|
|
flags |= AV_TX_INPLACE; /* in-place */
|
|
flags |= FF_TX_PRESHUFFLE; /* This function handles the permute step */
|
|
|
|
if ((ret = ff_tx_init_subtx(s, TX_TYPE(FFT), flags, &sub_opts, len, inv, scale)))
|
|
return ret;
|
|
|
|
if (is_inplace && (ret = ff_tx_gen_inplace_map(s, len)))
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static av_cold int TX_NAME(ff_tx_fft_inplace_small_init)(AVTXContext *s,
|
|
const FFTXCodelet *cd,
|
|
uint64_t flags,
|
|
FFTXCodeletOptions *opts,
|
|
int len, int inv,
|
|
const void *scale)
|
|
{
|
|
if (!(s->tmp = av_malloc(len*sizeof(*s->tmp))))
|
|
return AVERROR(ENOMEM);
|
|
flags &= ~AV_TX_INPLACE;
|
|
return TX_NAME(ff_tx_fft_init)(s, cd, flags, opts, len, inv, scale);
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_fft)(AVTXContext *s, void *_dst,
|
|
void *_src, ptrdiff_t stride)
|
|
{
|
|
TXComplex *src = _src;
|
|
TXComplex *dst1 = s->flags & AV_TX_INPLACE ? s->tmp : _dst;
|
|
TXComplex *dst2 = _dst;
|
|
int *map = s->sub[0].map;
|
|
int len = s->len;
|
|
|
|
/* Compilers can't vectorize this anyway without assuming AVX2, which they
|
|
* generally don't, at least without -march=native -mtune=native */
|
|
for (int i = 0; i < len; i++)
|
|
dst1[i] = src[map[i]];
|
|
|
|
s->fn[0](&s->sub[0], dst2, dst1, stride);
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_fft_inplace)(AVTXContext *s, void *_dst,
|
|
void *_src, ptrdiff_t stride)
|
|
{
|
|
TXComplex *src = _src;
|
|
TXComplex *dst = _dst;
|
|
TXComplex tmp;
|
|
const int *map = s->sub->map;
|
|
const int *inplace_idx = s->map;
|
|
int src_idx, dst_idx;
|
|
|
|
src_idx = *inplace_idx++;
|
|
do {
|
|
tmp = src[src_idx];
|
|
dst_idx = map[src_idx];
|
|
do {
|
|
FFSWAP(TXComplex, tmp, src[dst_idx]);
|
|
dst_idx = map[dst_idx];
|
|
} while (dst_idx != src_idx); /* Can be > as well, but was less predictable */
|
|
src[dst_idx] = tmp;
|
|
} while ((src_idx = *inplace_idx++));
|
|
|
|
s->fn[0](&s->sub[0], dst, src, stride);
|
|
}
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_fft_def) = {
|
|
.name = TX_NAME_STR("fft"),
|
|
.function = TX_NAME(ff_tx_fft),
|
|
.type = TX_TYPE(FFT),
|
|
.flags = AV_TX_UNALIGNED | FF_TX_OUT_OF_PLACE,
|
|
.factors[0] = TX_FACTOR_ANY,
|
|
.nb_factors = 1,
|
|
.min_len = 2,
|
|
.max_len = TX_LEN_UNLIMITED,
|
|
.init = TX_NAME(ff_tx_fft_init),
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_BASE,
|
|
};
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_fft_inplace_small_def) = {
|
|
.name = TX_NAME_STR("fft_inplace_small"),
|
|
.function = TX_NAME(ff_tx_fft),
|
|
.type = TX_TYPE(FFT),
|
|
.flags = AV_TX_UNALIGNED | FF_TX_OUT_OF_PLACE | AV_TX_INPLACE,
|
|
.factors[0] = TX_FACTOR_ANY,
|
|
.nb_factors = 1,
|
|
.min_len = 2,
|
|
.max_len = 65536,
|
|
.init = TX_NAME(ff_tx_fft_inplace_small_init),
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_BASE - 256,
|
|
};
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_fft_inplace_def) = {
|
|
.name = TX_NAME_STR("fft_inplace"),
|
|
.function = TX_NAME(ff_tx_fft_inplace),
|
|
.type = TX_TYPE(FFT),
|
|
.flags = AV_TX_UNALIGNED | FF_TX_OUT_OF_PLACE | AV_TX_INPLACE,
|
|
.factors[0] = TX_FACTOR_ANY,
|
|
.nb_factors = 1,
|
|
.min_len = 2,
|
|
.max_len = TX_LEN_UNLIMITED,
|
|
.init = TX_NAME(ff_tx_fft_init),
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_BASE - 512,
|
|
};
|
|
|
|
static av_cold int TX_NAME(ff_tx_fft_init_naive_small)(AVTXContext *s,
|
|
const FFTXCodelet *cd,
|
|
uint64_t flags,
|
|
FFTXCodeletOptions *opts,
|
|
int len, int inv,
|
|
const void *scale)
|
|
{
|
|
const double phase = s->inv ? 2.0*M_PI/len : -2.0*M_PI/len;
|
|
|
|
if (!(s->exp = av_malloc(len*len*sizeof(*s->exp))))
|
|
return AVERROR(ENOMEM);
|
|
|
|
for (int i = 0; i < len; i++) {
|
|
for (int j = 0; j < len; j++) {
|
|
const double factor = phase*i*j;
|
|
s->exp[i*j] = (TXComplex){
|
|
RESCALE(cos(factor)),
|
|
RESCALE(sin(factor)),
|
|
};
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_fft_naive)(AVTXContext *s, void *_dst, void *_src,
|
|
ptrdiff_t stride)
|
|
{
|
|
TXComplex *src = _src;
|
|
TXComplex *dst = _dst;
|
|
const int n = s->len;
|
|
double phase = s->inv ? 2.0*M_PI/n : -2.0*M_PI/n;
|
|
|
|
stride /= sizeof(*dst);
|
|
|
|
for (int i = 0; i < n; i++) {
|
|
TXComplex tmp = { 0 };
|
|
for (int j = 0; j < n; j++) {
|
|
const double factor = phase*i*j;
|
|
const TXComplex mult = {
|
|
RESCALE(cos(factor)),
|
|
RESCALE(sin(factor)),
|
|
};
|
|
TXComplex res;
|
|
CMUL3(res, src[j], mult);
|
|
tmp.re += res.re;
|
|
tmp.im += res.im;
|
|
}
|
|
dst[i*stride] = tmp;
|
|
}
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_fft_naive_small)(AVTXContext *s, void *_dst, void *_src,
|
|
ptrdiff_t stride)
|
|
{
|
|
TXComplex *src = _src;
|
|
TXComplex *dst = _dst;
|
|
const int n = s->len;
|
|
|
|
stride /= sizeof(*dst);
|
|
|
|
for (int i = 0; i < n; i++) {
|
|
TXComplex tmp = { 0 };
|
|
for (int j = 0; j < n; j++) {
|
|
TXComplex res;
|
|
const TXComplex mult = s->exp[i*j];
|
|
CMUL3(res, src[j], mult);
|
|
tmp.re += res.re;
|
|
tmp.im += res.im;
|
|
}
|
|
dst[i*stride] = tmp;
|
|
}
|
|
}
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_fft_naive_small_def) = {
|
|
.name = TX_NAME_STR("fft_naive_small"),
|
|
.function = TX_NAME(ff_tx_fft_naive_small),
|
|
.type = TX_TYPE(FFT),
|
|
.flags = AV_TX_UNALIGNED | FF_TX_OUT_OF_PLACE,
|
|
.factors[0] = TX_FACTOR_ANY,
|
|
.nb_factors = 1,
|
|
.min_len = 2,
|
|
.max_len = 1024,
|
|
.init = TX_NAME(ff_tx_fft_init_naive_small),
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_MIN/2,
|
|
};
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_fft_naive_def) = {
|
|
.name = TX_NAME_STR("fft_naive"),
|
|
.function = TX_NAME(ff_tx_fft_naive),
|
|
.type = TX_TYPE(FFT),
|
|
.flags = AV_TX_UNALIGNED | FF_TX_OUT_OF_PLACE,
|
|
.factors[0] = TX_FACTOR_ANY,
|
|
.nb_factors = 1,
|
|
.min_len = 2,
|
|
.max_len = TX_LEN_UNLIMITED,
|
|
.init = NULL,
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_MIN,
|
|
};
|
|
|
|
static av_cold int TX_NAME(ff_tx_fft_pfa_init)(AVTXContext *s,
|
|
const FFTXCodelet *cd,
|
|
uint64_t flags,
|
|
FFTXCodeletOptions *opts,
|
|
int len, int inv,
|
|
const void *scale)
|
|
{
|
|
int ret, *tmp, ps = flags & FF_TX_PRESHUFFLE;
|
|
FFTXCodeletOptions sub_opts = { .map_dir = FF_TX_MAP_GATHER };
|
|
size_t extra_tmp_len = 0;
|
|
int len_list[TX_MAX_DECOMPOSITIONS];
|
|
|
|
if ((ret = ff_tx_decompose_length(len_list, TX_TYPE(FFT), len, inv)) < 0)
|
|
return ret;
|
|
|
|
/* Two iterations to test both orderings. */
|
|
for (int i = 0; i < ret; i++) {
|
|
int len1 = len_list[i];
|
|
int len2 = len / len1;
|
|
|
|
/* Our ptwo transforms don't support striding the output. */
|
|
if (len2 & (len2 - 1))
|
|
FFSWAP(int, len1, len2);
|
|
|
|
ff_tx_clear_ctx(s);
|
|
|
|
/* First transform */
|
|
sub_opts.map_dir = FF_TX_MAP_GATHER;
|
|
flags &= ~AV_TX_INPLACE;
|
|
flags |= FF_TX_OUT_OF_PLACE;
|
|
flags |= FF_TX_PRESHUFFLE; /* This function handles the permute step */
|
|
ret = ff_tx_init_subtx(s, TX_TYPE(FFT), flags, &sub_opts,
|
|
len1, inv, scale);
|
|
|
|
if (ret == AVERROR(ENOMEM)) {
|
|
return ret;
|
|
} else if (ret < 0) { /* Try again without a preshuffle flag */
|
|
flags &= ~FF_TX_PRESHUFFLE;
|
|
ret = ff_tx_init_subtx(s, TX_TYPE(FFT), flags, &sub_opts,
|
|
len1, inv, scale);
|
|
if (ret == AVERROR(ENOMEM))
|
|
return ret;
|
|
else if (ret < 0)
|
|
continue;
|
|
}
|
|
|
|
/* Second transform. */
|
|
sub_opts.map_dir = FF_TX_MAP_SCATTER;
|
|
flags |= FF_TX_PRESHUFFLE;
|
|
retry:
|
|
flags &= ~FF_TX_OUT_OF_PLACE;
|
|
flags |= AV_TX_INPLACE;
|
|
ret = ff_tx_init_subtx(s, TX_TYPE(FFT), flags, &sub_opts,
|
|
len2, inv, scale);
|
|
|
|
if (ret == AVERROR(ENOMEM)) {
|
|
return ret;
|
|
} else if (ret < 0) { /* Try again with an out-of-place transform */
|
|
flags |= FF_TX_OUT_OF_PLACE;
|
|
flags &= ~AV_TX_INPLACE;
|
|
ret = ff_tx_init_subtx(s, TX_TYPE(FFT), flags, &sub_opts,
|
|
len2, inv, scale);
|
|
if (ret == AVERROR(ENOMEM)) {
|
|
return ret;
|
|
} else if (ret < 0) {
|
|
if (flags & FF_TX_PRESHUFFLE) { /* Retry again without a preshuf flag */
|
|
flags &= ~FF_TX_PRESHUFFLE;
|
|
goto retry;
|
|
} else {
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Success */
|
|
break;
|
|
}
|
|
|
|
/* If nothing was sucessful, error out */
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* Generate PFA map */
|
|
if ((ret = ff_tx_gen_compound_mapping(s, opts, 0,
|
|
s->sub[0].len, s->sub[1].len)))
|
|
return ret;
|
|
|
|
if (!(s->tmp = av_malloc(len*sizeof(*s->tmp))))
|
|
return AVERROR(ENOMEM);
|
|
|
|
/* Flatten input map */
|
|
tmp = (int *)s->tmp;
|
|
for (int k = 0; k < len; k += s->sub[0].len) {
|
|
memcpy(tmp, &s->map[k], s->sub[0].len*sizeof(*tmp));
|
|
for (int i = 0; i < s->sub[0].len; i++)
|
|
s->map[k + i] = tmp[s->sub[0].map[i]];
|
|
}
|
|
|
|
/* Only allocate extra temporary memory if we need it */
|
|
if (!(s->sub[1].flags & AV_TX_INPLACE))
|
|
extra_tmp_len = len;
|
|
else if (!ps)
|
|
extra_tmp_len = s->sub[0].len;
|
|
|
|
if (extra_tmp_len && !(s->exp = av_malloc(extra_tmp_len*sizeof(*s->exp))))
|
|
return AVERROR(ENOMEM);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_fft_pfa)(AVTXContext *s, void *_out,
|
|
void *_in, ptrdiff_t stride)
|
|
{
|
|
const int n = s->sub[0].len, m = s->sub[1].len, l = s->len;
|
|
const int *in_map = s->map, *out_map = in_map + l;
|
|
const int *sub_map = s->sub[1].map;
|
|
TXComplex *tmp1 = s->sub[1].flags & AV_TX_INPLACE ? s->tmp : s->exp;
|
|
TXComplex *in = _in, *out = _out;
|
|
|
|
stride /= sizeof(*out);
|
|
|
|
for (int i = 0; i < m; i++) {
|
|
for (int j = 0; j < n; j++)
|
|
s->exp[j] = in[in_map[i*n + j]];
|
|
s->fn[0](&s->sub[0], &s->tmp[sub_map[i]], s->exp, m*sizeof(TXComplex));
|
|
}
|
|
|
|
for (int i = 0; i < n; i++)
|
|
s->fn[1](&s->sub[1], &tmp1[m*i], &s->tmp[m*i], sizeof(TXComplex));
|
|
|
|
for (int i = 0; i < l; i++)
|
|
out[i*stride] = tmp1[out_map[i]];
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_fft_pfa_ns)(AVTXContext *s, void *_out,
|
|
void *_in, ptrdiff_t stride)
|
|
{
|
|
const int n = s->sub[0].len, m = s->sub[1].len, l = s->len;
|
|
const int *in_map = s->map, *out_map = in_map + l;
|
|
const int *sub_map = s->sub[1].map;
|
|
TXComplex *tmp1 = s->sub[1].flags & AV_TX_INPLACE ? s->tmp : s->exp;
|
|
TXComplex *in = _in, *out = _out;
|
|
|
|
stride /= sizeof(*out);
|
|
|
|
for (int i = 0; i < m; i++)
|
|
s->fn[0](&s->sub[0], &s->tmp[sub_map[i]], &in[i*n], m*sizeof(TXComplex));
|
|
|
|
for (int i = 0; i < n; i++)
|
|
s->fn[1](&s->sub[1], &tmp1[m*i], &s->tmp[m*i], sizeof(TXComplex));
|
|
|
|
for (int i = 0; i < l; i++)
|
|
out[i*stride] = tmp1[out_map[i]];
|
|
}
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_fft_pfa_def) = {
|
|
.name = TX_NAME_STR("fft_pfa"),
|
|
.function = TX_NAME(ff_tx_fft_pfa),
|
|
.type = TX_TYPE(FFT),
|
|
.flags = AV_TX_UNALIGNED | AV_TX_INPLACE | FF_TX_OUT_OF_PLACE,
|
|
.factors = { 7, 5, 3, 2, TX_FACTOR_ANY },
|
|
.nb_factors = 2,
|
|
.min_len = 2*3,
|
|
.max_len = TX_LEN_UNLIMITED,
|
|
.init = TX_NAME(ff_tx_fft_pfa_init),
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_BASE,
|
|
};
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_fft_pfa_ns_def) = {
|
|
.name = TX_NAME_STR("fft_pfa_ns"),
|
|
.function = TX_NAME(ff_tx_fft_pfa_ns),
|
|
.type = TX_TYPE(FFT),
|
|
.flags = AV_TX_UNALIGNED | AV_TX_INPLACE | FF_TX_OUT_OF_PLACE |
|
|
FF_TX_PRESHUFFLE,
|
|
.factors = { 7, 5, 3, 2, TX_FACTOR_ANY },
|
|
.nb_factors = 2,
|
|
.min_len = 2*3,
|
|
.max_len = TX_LEN_UNLIMITED,
|
|
.init = TX_NAME(ff_tx_fft_pfa_init),
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_BASE,
|
|
};
|
|
|
|
static av_cold int TX_NAME(ff_tx_mdct_naive_init)(AVTXContext *s,
|
|
const FFTXCodelet *cd,
|
|
uint64_t flags,
|
|
FFTXCodeletOptions *opts,
|
|
int len, int inv,
|
|
const void *scale)
|
|
{
|
|
s->scale_d = *((SCALE_TYPE *)scale);
|
|
s->scale_f = s->scale_d;
|
|
return 0;
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_mdct_naive_fwd)(AVTXContext *s, void *_dst,
|
|
void *_src, ptrdiff_t stride)
|
|
{
|
|
TXSample *src = _src;
|
|
TXSample *dst = _dst;
|
|
double scale = s->scale_d;
|
|
int len = s->len;
|
|
const double phase = M_PI/(4.0*len);
|
|
|
|
stride /= sizeof(*dst);
|
|
|
|
for (int i = 0; i < len; i++) {
|
|
double sum = 0.0;
|
|
for (int j = 0; j < len*2; j++) {
|
|
int a = (2*j + 1 + len) * (2*i + 1);
|
|
sum += UNSCALE(src[j]) * cos(a * phase);
|
|
}
|
|
dst[i*stride] = RESCALE(sum*scale);
|
|
}
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_mdct_naive_inv)(AVTXContext *s, void *_dst,
|
|
void *_src, ptrdiff_t stride)
|
|
{
|
|
TXSample *src = _src;
|
|
TXSample *dst = _dst;
|
|
double scale = s->scale_d;
|
|
int len = s->len >> 1;
|
|
int len2 = len*2;
|
|
const double phase = M_PI/(4.0*len2);
|
|
|
|
stride /= sizeof(*src);
|
|
|
|
for (int i = 0; i < len; i++) {
|
|
double sum_d = 0.0;
|
|
double sum_u = 0.0;
|
|
double i_d = phase * (4*len - 2*i - 1);
|
|
double i_u = phase * (3*len2 + 2*i + 1);
|
|
for (int j = 0; j < len2; j++) {
|
|
double a = (2 * j + 1);
|
|
double a_d = cos(a * i_d);
|
|
double a_u = cos(a * i_u);
|
|
double val = UNSCALE(src[j*stride]);
|
|
sum_d += a_d * val;
|
|
sum_u += a_u * val;
|
|
}
|
|
dst[i + 0] = RESCALE( sum_d*scale);
|
|
dst[i + len] = RESCALE(-sum_u*scale);
|
|
}
|
|
}
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_mdct_naive_fwd_def) = {
|
|
.name = TX_NAME_STR("mdct_naive_fwd"),
|
|
.function = TX_NAME(ff_tx_mdct_naive_fwd),
|
|
.type = TX_TYPE(MDCT),
|
|
.flags = AV_TX_UNALIGNED | FF_TX_OUT_OF_PLACE | FF_TX_FORWARD_ONLY,
|
|
.factors = { 2, TX_FACTOR_ANY }, /* MDCTs need an even length */
|
|
.nb_factors = 2,
|
|
.min_len = 2,
|
|
.max_len = TX_LEN_UNLIMITED,
|
|
.init = TX_NAME(ff_tx_mdct_naive_init),
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_MIN,
|
|
};
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_mdct_naive_inv_def) = {
|
|
.name = TX_NAME_STR("mdct_naive_inv"),
|
|
.function = TX_NAME(ff_tx_mdct_naive_inv),
|
|
.type = TX_TYPE(MDCT),
|
|
.flags = AV_TX_UNALIGNED | FF_TX_OUT_OF_PLACE | FF_TX_INVERSE_ONLY,
|
|
.factors = { 2, TX_FACTOR_ANY },
|
|
.nb_factors = 2,
|
|
.min_len = 2,
|
|
.max_len = TX_LEN_UNLIMITED,
|
|
.init = TX_NAME(ff_tx_mdct_naive_init),
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_MIN,
|
|
};
|
|
|
|
static av_cold int TX_NAME(ff_tx_mdct_init)(AVTXContext *s,
|
|
const FFTXCodelet *cd,
|
|
uint64_t flags,
|
|
FFTXCodeletOptions *opts,
|
|
int len, int inv,
|
|
const void *scale)
|
|
{
|
|
int ret;
|
|
FFTXCodeletOptions sub_opts = {
|
|
.map_dir = !inv ? FF_TX_MAP_SCATTER : FF_TX_MAP_GATHER,
|
|
};
|
|
|
|
s->scale_d = *((SCALE_TYPE *)scale);
|
|
s->scale_f = s->scale_d;
|
|
|
|
flags &= ~FF_TX_OUT_OF_PLACE; /* We want the subtransform to be */
|
|
flags |= AV_TX_INPLACE; /* in-place */
|
|
flags |= FF_TX_PRESHUFFLE; /* First try with an in-place transform */
|
|
|
|
if ((ret = ff_tx_init_subtx(s, TX_TYPE(FFT), flags, &sub_opts, len >> 1,
|
|
inv, scale))) {
|
|
flags &= ~FF_TX_PRESHUFFLE; /* Now try with a generic FFT */
|
|
if ((ret = ff_tx_init_subtx(s, TX_TYPE(FFT), flags, &sub_opts, len >> 1,
|
|
inv, scale)))
|
|
return ret;
|
|
}
|
|
|
|
s->map = av_malloc((len >> 1)*sizeof(*s->map));
|
|
if (!s->map)
|
|
return AVERROR(ENOMEM);
|
|
|
|
/* If we need to preshuffle copy the map from the subcontext */
|
|
if (s->sub[0].flags & FF_TX_PRESHUFFLE) {
|
|
memcpy(s->map, s->sub->map, (len >> 1)*sizeof(*s->map));
|
|
} else {
|
|
for (int i = 0; i < len >> 1; i++)
|
|
s->map[i] = i;
|
|
}
|
|
|
|
if ((ret = TX_TAB(ff_tx_mdct_gen_exp)(s, inv ? s->map : NULL)))
|
|
return ret;
|
|
|
|
/* Saves a multiply in a hot path. */
|
|
if (inv)
|
|
for (int i = 0; i < (s->len >> 1); i++)
|
|
s->map[i] <<= 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_mdct_fwd)(AVTXContext *s, void *_dst, void *_src,
|
|
ptrdiff_t stride)
|
|
{
|
|
TXSample *src = _src, *dst = _dst;
|
|
TXComplex *exp = s->exp, tmp, *z = _dst;
|
|
const int len2 = s->len >> 1;
|
|
const int len4 = s->len >> 2;
|
|
const int len3 = len2 * 3;
|
|
const int *sub_map = s->map;
|
|
|
|
stride /= sizeof(*dst);
|
|
|
|
for (int i = 0; i < len2; i++) { /* Folding and pre-reindexing */
|
|
const int k = 2*i;
|
|
const int idx = sub_map[i];
|
|
if (k < len2) {
|
|
tmp.re = FOLD(-src[ len2 + k], src[1*len2 - 1 - k]);
|
|
tmp.im = FOLD(-src[ len3 + k], -src[1*len3 - 1 - k]);
|
|
} else {
|
|
tmp.re = FOLD(-src[ len2 + k], -src[5*len2 - 1 - k]);
|
|
tmp.im = FOLD( src[-len2 + k], -src[1*len3 - 1 - k]);
|
|
}
|
|
CMUL(z[idx].im, z[idx].re, tmp.re, tmp.im, exp[i].re, exp[i].im);
|
|
}
|
|
|
|
s->fn[0](&s->sub[0], z, z, sizeof(TXComplex));
|
|
|
|
for (int i = 0; i < len4; i++) {
|
|
const int i0 = len4 + i, i1 = len4 - i - 1;
|
|
TXComplex src1 = { z[i1].re, z[i1].im };
|
|
TXComplex src0 = { z[i0].re, z[i0].im };
|
|
|
|
CMUL(dst[2*i1*stride + stride], dst[2*i0*stride], src0.re, src0.im,
|
|
exp[i0].im, exp[i0].re);
|
|
CMUL(dst[2*i0*stride + stride], dst[2*i1*stride], src1.re, src1.im,
|
|
exp[i1].im, exp[i1].re);
|
|
}
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_mdct_inv)(AVTXContext *s, void *_dst, void *_src,
|
|
ptrdiff_t stride)
|
|
{
|
|
TXComplex *z = _dst, *exp = s->exp;
|
|
const TXSample *src = _src, *in1, *in2;
|
|
const int len2 = s->len >> 1;
|
|
const int len4 = s->len >> 2;
|
|
const int *sub_map = s->map;
|
|
|
|
stride /= sizeof(*src);
|
|
in1 = src;
|
|
in2 = src + ((len2*2) - 1) * stride;
|
|
|
|
for (int i = 0; i < len2; i++) {
|
|
int k = sub_map[i];
|
|
TXComplex tmp = { in2[-k*stride], in1[k*stride] };
|
|
CMUL3(z[i], tmp, exp[i]);
|
|
}
|
|
|
|
s->fn[0](&s->sub[0], z, z, sizeof(TXComplex));
|
|
|
|
exp += len2;
|
|
for (int i = 0; i < len4; i++) {
|
|
const int i0 = len4 + i, i1 = len4 - i - 1;
|
|
TXComplex src1 = { z[i1].im, z[i1].re };
|
|
TXComplex src0 = { z[i0].im, z[i0].re };
|
|
|
|
CMUL(z[i1].re, z[i0].im, src1.re, src1.im, exp[i1].im, exp[i1].re);
|
|
CMUL(z[i0].re, z[i1].im, src0.re, src0.im, exp[i0].im, exp[i0].re);
|
|
}
|
|
}
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_mdct_fwd_def) = {
|
|
.name = TX_NAME_STR("mdct_fwd"),
|
|
.function = TX_NAME(ff_tx_mdct_fwd),
|
|
.type = TX_TYPE(MDCT),
|
|
.flags = AV_TX_UNALIGNED | FF_TX_OUT_OF_PLACE | FF_TX_FORWARD_ONLY,
|
|
.factors = { 2, TX_FACTOR_ANY },
|
|
.nb_factors = 2,
|
|
.min_len = 2,
|
|
.max_len = TX_LEN_UNLIMITED,
|
|
.init = TX_NAME(ff_tx_mdct_init),
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_BASE,
|
|
};
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_mdct_inv_def) = {
|
|
.name = TX_NAME_STR("mdct_inv"),
|
|
.function = TX_NAME(ff_tx_mdct_inv),
|
|
.type = TX_TYPE(MDCT),
|
|
.flags = AV_TX_UNALIGNED | FF_TX_OUT_OF_PLACE | FF_TX_INVERSE_ONLY,
|
|
.factors = { 2, TX_FACTOR_ANY },
|
|
.nb_factors = 2,
|
|
.min_len = 2,
|
|
.max_len = TX_LEN_UNLIMITED,
|
|
.init = TX_NAME(ff_tx_mdct_init),
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_BASE,
|
|
};
|
|
|
|
static av_cold int TX_NAME(ff_tx_mdct_inv_full_init)(AVTXContext *s,
|
|
const FFTXCodelet *cd,
|
|
uint64_t flags,
|
|
FFTXCodeletOptions *opts,
|
|
int len, int inv,
|
|
const void *scale)
|
|
{
|
|
int ret;
|
|
|
|
s->scale_d = *((SCALE_TYPE *)scale);
|
|
s->scale_f = s->scale_d;
|
|
|
|
flags &= ~AV_TX_FULL_IMDCT;
|
|
|
|
if ((ret = ff_tx_init_subtx(s, TX_TYPE(MDCT), flags, NULL, len, 1, scale)))
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_mdct_inv_full)(AVTXContext *s, void *_dst,
|
|
void *_src, ptrdiff_t stride)
|
|
{
|
|
int len = s->len << 1;
|
|
int len2 = len >> 1;
|
|
int len4 = len >> 2;
|
|
TXSample *dst = _dst;
|
|
|
|
s->fn[0](&s->sub[0], dst + len4, _src, stride);
|
|
|
|
stride /= sizeof(*dst);
|
|
|
|
for (int i = 0; i < len4; i++) {
|
|
dst[ i*stride] = -dst[(len2 - i - 1)*stride];
|
|
dst[(len - i - 1)*stride] = dst[(len2 + i + 0)*stride];
|
|
}
|
|
}
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_mdct_inv_full_def) = {
|
|
.name = TX_NAME_STR("mdct_inv_full"),
|
|
.function = TX_NAME(ff_tx_mdct_inv_full),
|
|
.type = TX_TYPE(MDCT),
|
|
.flags = AV_TX_UNALIGNED | AV_TX_INPLACE |
|
|
FF_TX_OUT_OF_PLACE | AV_TX_FULL_IMDCT,
|
|
.factors = { 2, TX_FACTOR_ANY },
|
|
.nb_factors = 2,
|
|
.min_len = 2,
|
|
.max_len = TX_LEN_UNLIMITED,
|
|
.init = TX_NAME(ff_tx_mdct_inv_full_init),
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_BASE,
|
|
};
|
|
|
|
static av_cold int TX_NAME(ff_tx_mdct_pfa_init)(AVTXContext *s,
|
|
const FFTXCodelet *cd,
|
|
uint64_t flags,
|
|
FFTXCodeletOptions *opts,
|
|
int len, int inv,
|
|
const void *scale)
|
|
{
|
|
int ret, sub_len;
|
|
FFTXCodeletOptions sub_opts = { .map_dir = FF_TX_MAP_SCATTER };
|
|
|
|
len >>= 1;
|
|
sub_len = len / cd->factors[0];
|
|
|
|
s->scale_d = *((SCALE_TYPE *)scale);
|
|
s->scale_f = s->scale_d;
|
|
|
|
flags &= ~FF_TX_OUT_OF_PLACE; /* We want the subtransform to be */
|
|
flags |= AV_TX_INPLACE; /* in-place */
|
|
flags |= FF_TX_PRESHUFFLE; /* This function handles the permute step */
|
|
|
|
if ((ret = ff_tx_init_subtx(s, TX_TYPE(FFT), flags, &sub_opts,
|
|
sub_len, inv, scale)))
|
|
return ret;
|
|
|
|
if ((ret = ff_tx_gen_compound_mapping(s, opts, s->inv, cd->factors[0], sub_len)))
|
|
return ret;
|
|
|
|
/* Our 15-point transform is also a compound one, so embed its input map */
|
|
if (cd->factors[0] == 15)
|
|
TX_EMBED_INPUT_PFA_MAP(s->map, len, 3, 5);
|
|
|
|
if ((ret = TX_TAB(ff_tx_mdct_gen_exp)(s, inv ? s->map : NULL)))
|
|
return ret;
|
|
|
|
/* Saves multiplies in loops. */
|
|
for (int i = 0; i < len; i++)
|
|
s->map[i] <<= 1;
|
|
|
|
if (!(s->tmp = av_malloc(len*sizeof(*s->tmp))))
|
|
return AVERROR(ENOMEM);
|
|
|
|
TX_TAB(ff_tx_init_tabs)(len / sub_len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define DECL_COMP_IMDCT(N) \
|
|
static void TX_NAME(ff_tx_mdct_pfa_##N##xM_inv)(AVTXContext *s, void *_dst, \
|
|
void *_src, ptrdiff_t stride) \
|
|
{ \
|
|
TXComplex fft##N##in[N]; \
|
|
TXComplex *z = _dst, *exp = s->exp; \
|
|
const TXSample *src = _src, *in1, *in2; \
|
|
const int len4 = s->len >> 2; \
|
|
const int len2 = s->len >> 1; \
|
|
const int m = s->sub->len; \
|
|
const int *in_map = s->map, *out_map = in_map + N*m; \
|
|
const int *sub_map = s->sub->map; \
|
|
\
|
|
stride /= sizeof(*src); /* To convert it from bytes */ \
|
|
in1 = src; \
|
|
in2 = src + ((N*m*2) - 1) * stride; \
|
|
\
|
|
for (int i = 0; i < len2; i += N) { \
|
|
for (int j = 0; j < N; j++) { \
|
|
const int k = in_map[j]; \
|
|
TXComplex tmp = { in2[-k*stride], in1[k*stride] }; \
|
|
CMUL3(fft##N##in[j], tmp, exp[j]); \
|
|
} \
|
|
fft##N(s->tmp + *(sub_map++), fft##N##in, m); \
|
|
exp += N; \
|
|
in_map += N; \
|
|
} \
|
|
\
|
|
for (int i = 0; i < N; i++) \
|
|
s->fn[0](&s->sub[0], s->tmp + m*i, s->tmp + m*i, sizeof(TXComplex)); \
|
|
\
|
|
for (int i = 0; i < len4; i++) { \
|
|
const int i0 = len4 + i, i1 = len4 - i - 1; \
|
|
const int s0 = out_map[i0], s1 = out_map[i1]; \
|
|
TXComplex src1 = { s->tmp[s1].im, s->tmp[s1].re }; \
|
|
TXComplex src0 = { s->tmp[s0].im, s->tmp[s0].re }; \
|
|
\
|
|
CMUL(z[i1].re, z[i0].im, src1.re, src1.im, exp[i1].im, exp[i1].re); \
|
|
CMUL(z[i0].re, z[i1].im, src0.re, src0.im, exp[i0].im, exp[i0].re); \
|
|
} \
|
|
} \
|
|
\
|
|
static const FFTXCodelet TX_NAME(ff_tx_mdct_pfa_##N##xM_inv_def) = { \
|
|
.name = TX_NAME_STR("mdct_pfa_" #N "xM_inv"), \
|
|
.function = TX_NAME(ff_tx_mdct_pfa_##N##xM_inv), \
|
|
.type = TX_TYPE(MDCT), \
|
|
.flags = AV_TX_UNALIGNED | FF_TX_OUT_OF_PLACE | FF_TX_INVERSE_ONLY, \
|
|
.factors = { N, TX_FACTOR_ANY }, \
|
|
.nb_factors = 2, \
|
|
.min_len = N*2, \
|
|
.max_len = TX_LEN_UNLIMITED, \
|
|
.init = TX_NAME(ff_tx_mdct_pfa_init), \
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL, \
|
|
.prio = FF_TX_PRIO_BASE, \
|
|
};
|
|
|
|
DECL_COMP_IMDCT(3)
|
|
DECL_COMP_IMDCT(5)
|
|
DECL_COMP_IMDCT(7)
|
|
DECL_COMP_IMDCT(9)
|
|
DECL_COMP_IMDCT(15)
|
|
|
|
#define DECL_COMP_MDCT(N) \
|
|
static void TX_NAME(ff_tx_mdct_pfa_##N##xM_fwd)(AVTXContext *s, void *_dst, \
|
|
void *_src, ptrdiff_t stride) \
|
|
{ \
|
|
TXComplex fft##N##in[N]; \
|
|
TXSample *src = _src, *dst = _dst; \
|
|
TXComplex *exp = s->exp, tmp; \
|
|
const int m = s->sub->len; \
|
|
const int len4 = N*m; \
|
|
const int len3 = len4 * 3; \
|
|
const int len8 = s->len >> 2; \
|
|
const int *in_map = s->map, *out_map = in_map + N*m; \
|
|
const int *sub_map = s->sub->map; \
|
|
\
|
|
stride /= sizeof(*dst); \
|
|
\
|
|
for (int i = 0; i < m; i++) { /* Folding and pre-reindexing */ \
|
|
for (int j = 0; j < N; j++) { \
|
|
const int k = in_map[i*N + j]; \
|
|
if (k < len4) { \
|
|
tmp.re = FOLD(-src[ len4 + k], src[1*len4 - 1 - k]); \
|
|
tmp.im = FOLD(-src[ len3 + k], -src[1*len3 - 1 - k]); \
|
|
} else { \
|
|
tmp.re = FOLD(-src[ len4 + k], -src[5*len4 - 1 - k]); \
|
|
tmp.im = FOLD( src[-len4 + k], -src[1*len3 - 1 - k]); \
|
|
} \
|
|
CMUL(fft##N##in[j].im, fft##N##in[j].re, tmp.re, tmp.im, \
|
|
exp[k >> 1].re, exp[k >> 1].im); \
|
|
} \
|
|
fft##N(s->tmp + sub_map[i], fft##N##in, m); \
|
|
} \
|
|
\
|
|
for (int i = 0; i < N; i++) \
|
|
s->fn[0](&s->sub[0], s->tmp + m*i, s->tmp + m*i, sizeof(TXComplex)); \
|
|
\
|
|
for (int i = 0; i < len8; i++) { \
|
|
const int i0 = len8 + i, i1 = len8 - i - 1; \
|
|
const int s0 = out_map[i0], s1 = out_map[i1]; \
|
|
TXComplex src1 = { s->tmp[s1].re, s->tmp[s1].im }; \
|
|
TXComplex src0 = { s->tmp[s0].re, s->tmp[s0].im }; \
|
|
\
|
|
CMUL(dst[2*i1*stride + stride], dst[2*i0*stride], src0.re, src0.im, \
|
|
exp[i0].im, exp[i0].re); \
|
|
CMUL(dst[2*i0*stride + stride], dst[2*i1*stride], src1.re, src1.im, \
|
|
exp[i1].im, exp[i1].re); \
|
|
} \
|
|
} \
|
|
\
|
|
static const FFTXCodelet TX_NAME(ff_tx_mdct_pfa_##N##xM_fwd_def) = { \
|
|
.name = TX_NAME_STR("mdct_pfa_" #N "xM_fwd"), \
|
|
.function = TX_NAME(ff_tx_mdct_pfa_##N##xM_fwd), \
|
|
.type = TX_TYPE(MDCT), \
|
|
.flags = AV_TX_UNALIGNED | FF_TX_OUT_OF_PLACE | FF_TX_FORWARD_ONLY, \
|
|
.factors = { N, TX_FACTOR_ANY }, \
|
|
.nb_factors = 2, \
|
|
.min_len = N*2, \
|
|
.max_len = TX_LEN_UNLIMITED, \
|
|
.init = TX_NAME(ff_tx_mdct_pfa_init), \
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL, \
|
|
.prio = FF_TX_PRIO_BASE, \
|
|
};
|
|
|
|
DECL_COMP_MDCT(3)
|
|
DECL_COMP_MDCT(5)
|
|
DECL_COMP_MDCT(7)
|
|
DECL_COMP_MDCT(9)
|
|
DECL_COMP_MDCT(15)
|
|
|
|
static av_cold int TX_NAME(ff_tx_rdft_init)(AVTXContext *s,
|
|
const FFTXCodelet *cd,
|
|
uint64_t flags,
|
|
FFTXCodeletOptions *opts,
|
|
int len, int inv,
|
|
const void *scale)
|
|
{
|
|
int ret;
|
|
double f, m;
|
|
TXSample *tab;
|
|
uint64_t r2r = flags & AV_TX_REAL_TO_REAL;
|
|
int len4 = FFALIGN(len, 4) / 4;
|
|
|
|
s->scale_d = *((SCALE_TYPE *)scale);
|
|
s->scale_f = s->scale_d;
|
|
|
|
flags &= ~(AV_TX_REAL_TO_REAL | AV_TX_REAL_TO_IMAGINARY);
|
|
|
|
if ((ret = ff_tx_init_subtx(s, TX_TYPE(FFT), flags, NULL, len >> 1, inv, scale)))
|
|
return ret;
|
|
|
|
if (!(s->exp = av_mallocz((8 + 2*len4)*sizeof(*s->exp))))
|
|
return AVERROR(ENOMEM);
|
|
|
|
tab = (TXSample *)s->exp;
|
|
|
|
f = 2*M_PI/len;
|
|
|
|
m = (inv ? 2*s->scale_d : s->scale_d);
|
|
|
|
*tab++ = RESCALE((inv ? 0.5 : 1.0) * m);
|
|
*tab++ = RESCALE(inv ? 0.5*m : 1.0*m);
|
|
*tab++ = RESCALE( m);
|
|
*tab++ = RESCALE(-m);
|
|
|
|
*tab++ = RESCALE( (0.5 - 0.0) * m);
|
|
if (r2r)
|
|
*tab++ = 1 / s->scale_f;
|
|
else
|
|
*tab++ = RESCALE( (0.0 - 0.5) * m);
|
|
*tab++ = RESCALE( (0.5 - inv) * m);
|
|
*tab++ = RESCALE(-(0.5 - inv) * m);
|
|
|
|
for (int i = 0; i < len4; i++)
|
|
*tab++ = RESCALE(cos(i*f));
|
|
|
|
tab = ((TXSample *)s->exp) + len4 + 8;
|
|
|
|
for (int i = 0; i < len4; i++)
|
|
*tab++ = RESCALE(cos(((len - i*4)/4.0)*f)) * (inv ? 1 : -1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define DECL_RDFT(n, inv) \
|
|
static void TX_NAME(ff_tx_rdft_ ##n)(AVTXContext *s, void *_dst, \
|
|
void *_src, ptrdiff_t stride) \
|
|
{ \
|
|
const int len2 = s->len >> 1; \
|
|
const int len4 = s->len >> 2; \
|
|
const TXSample *fact = (void *)s->exp; \
|
|
const TXSample *tcos = fact + 8; \
|
|
const TXSample *tsin = tcos + len4; \
|
|
TXComplex *data = inv ? _src : _dst; \
|
|
TXComplex t[3]; \
|
|
\
|
|
if (!inv) \
|
|
s->fn[0](&s->sub[0], data, _src, sizeof(TXComplex)); \
|
|
else \
|
|
data[0].im = data[len2].re; \
|
|
\
|
|
/* The DC value's both components are real, but we need to change them \
|
|
* into complex values. Also, the middle of the array is special-cased. \
|
|
* These operations can be done before or after the loop. */ \
|
|
t[0].re = data[0].re; \
|
|
data[0].re = t[0].re + data[0].im; \
|
|
data[0].im = t[0].re - data[0].im; \
|
|
data[ 0].re = MULT(fact[0], data[ 0].re); \
|
|
data[ 0].im = MULT(fact[1], data[ 0].im); \
|
|
data[len4].re = MULT(fact[2], data[len4].re); \
|
|
data[len4].im = MULT(fact[3], data[len4].im); \
|
|
\
|
|
for (int i = 1; i < len4; i++) { \
|
|
/* Separate even and odd FFTs */ \
|
|
t[0].re = MULT(fact[4], (data[i].re + data[len2 - i].re)); \
|
|
t[0].im = MULT(fact[5], (data[i].im - data[len2 - i].im)); \
|
|
t[1].re = MULT(fact[6], (data[i].im + data[len2 - i].im)); \
|
|
t[1].im = MULT(fact[7], (data[i].re - data[len2 - i].re)); \
|
|
\
|
|
/* Apply twiddle factors to the odd FFT and add to the even FFT */ \
|
|
CMUL(t[2].re, t[2].im, t[1].re, t[1].im, tcos[i], tsin[i]); \
|
|
\
|
|
data[ i].re = t[0].re + t[2].re; \
|
|
data[ i].im = t[2].im - t[0].im; \
|
|
data[len2 - i].re = t[0].re - t[2].re; \
|
|
data[len2 - i].im = t[2].im + t[0].im; \
|
|
} \
|
|
\
|
|
if (inv) { \
|
|
s->fn[0](&s->sub[0], _dst, data, sizeof(TXComplex)); \
|
|
} else { \
|
|
/* Move [0].im to the last position, as convention requires */ \
|
|
data[len2].re = data[0].im; \
|
|
data[ 0].im = data[len2].im = 0; \
|
|
} \
|
|
} \
|
|
\
|
|
static const FFTXCodelet TX_NAME(ff_tx_rdft_ ##n## _def) = { \
|
|
.name = TX_NAME_STR("rdft_" #n), \
|
|
.function = TX_NAME(ff_tx_rdft_ ##n), \
|
|
.type = TX_TYPE(RDFT), \
|
|
.flags = AV_TX_UNALIGNED | AV_TX_INPLACE | FF_TX_OUT_OF_PLACE | \
|
|
(inv ? FF_TX_INVERSE_ONLY : FF_TX_FORWARD_ONLY), \
|
|
.factors = { 4, TX_FACTOR_ANY }, \
|
|
.nb_factors = 2, \
|
|
.min_len = 4, \
|
|
.max_len = TX_LEN_UNLIMITED, \
|
|
.init = TX_NAME(ff_tx_rdft_init), \
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL, \
|
|
.prio = FF_TX_PRIO_BASE, \
|
|
};
|
|
|
|
DECL_RDFT(r2c, 0)
|
|
DECL_RDFT(c2r, 1)
|
|
|
|
#define DECL_RDFT_HALF(n, mode, mod2) \
|
|
static void TX_NAME(ff_tx_rdft_ ##n)(AVTXContext *s, void *_dst, \
|
|
void *_src, ptrdiff_t stride) \
|
|
{ \
|
|
const int len = s->len; \
|
|
const int len2 = len >> 1; \
|
|
const int len4 = len >> 2; \
|
|
const int aligned_len4 = FFALIGN(len, 4)/4; \
|
|
const TXSample *fact = (void *)s->exp; \
|
|
const TXSample *tcos = fact + 8; \
|
|
const TXSample *tsin = tcos + aligned_len4; \
|
|
TXComplex *data = _dst; \
|
|
TXSample *out = _dst; /* Half-complex is forward-only */ \
|
|
TXSample tmp_dc; \
|
|
av_unused TXSample tmp_mid; \
|
|
TXSample tmp[4]; \
|
|
TXComplex sf, sl; \
|
|
\
|
|
s->fn[0](&s->sub[0], _dst, _src, sizeof(TXComplex)); \
|
|
\
|
|
tmp_dc = data[0].re; \
|
|
data[ 0].re = tmp_dc + data[0].im; \
|
|
tmp_dc = tmp_dc - data[0].im; \
|
|
\
|
|
data[ 0].re = MULT(fact[0], data[ 0].re); \
|
|
tmp_dc = MULT(fact[1], tmp_dc); \
|
|
data[len4].re = MULT(fact[2], data[len4].re); \
|
|
\
|
|
if (!mod2) { \
|
|
data[len4].im = MULT(fact[3], data[len4].im); \
|
|
} else { \
|
|
sf = data[len4]; \
|
|
sl = data[len4 + 1]; \
|
|
if (mode == AV_TX_REAL_TO_REAL) \
|
|
tmp[0] = MULT(fact[4], (sf.re + sl.re)); \
|
|
else \
|
|
tmp[0] = MULT(fact[5], (sf.im - sl.im)); \
|
|
tmp[1] = MULT(fact[6], (sf.im + sl.im)); \
|
|
tmp[2] = MULT(fact[7], (sf.re - sl.re)); \
|
|
\
|
|
if (mode == AV_TX_REAL_TO_REAL) { \
|
|
tmp[3] = tmp[1]*tcos[len4] - tmp[2]*tsin[len4]; \
|
|
tmp_mid = (tmp[0] - tmp[3]); \
|
|
} else { \
|
|
tmp[3] = tmp[1]*tsin[len4] + tmp[2]*tcos[len4]; \
|
|
tmp_mid = (tmp[0] + tmp[3]); \
|
|
} \
|
|
} \
|
|
\
|
|
/* NOTE: unrolling this breaks non-mod8 lengths */ \
|
|
for (int i = 1; i <= len4; i++) { \
|
|
TXSample tmp[4]; \
|
|
TXComplex sf = data[i]; \
|
|
TXComplex sl = data[len2 - i]; \
|
|
\
|
|
if (mode == AV_TX_REAL_TO_REAL) \
|
|
tmp[0] = MULT(fact[4], (sf.re + sl.re)); \
|
|
else \
|
|
tmp[0] = MULT(fact[5], (sf.im - sl.im)); \
|
|
\
|
|
tmp[1] = MULT(fact[6], (sf.im + sl.im)); \
|
|
tmp[2] = MULT(fact[7], (sf.re - sl.re)); \
|
|
\
|
|
if (mode == AV_TX_REAL_TO_REAL) { \
|
|
tmp[3] = tmp[1]*tcos[i] - tmp[2]*tsin[i]; \
|
|
out[i] = (tmp[0] + tmp[3]); \
|
|
out[len - i] = (tmp[0] - tmp[3]); \
|
|
} else { \
|
|
tmp[3] = tmp[1]*tsin[i] + tmp[2]*tcos[i]; \
|
|
out[i - 1] = (tmp[3] - tmp[0]); \
|
|
out[len - i - 1] = (tmp[0] + tmp[3]); \
|
|
} \
|
|
} \
|
|
\
|
|
for (int i = 1; i < (len4 + (mode == AV_TX_REAL_TO_IMAGINARY)); i++) \
|
|
out[len2 - i] = out[len - i]; \
|
|
\
|
|
if (mode == AV_TX_REAL_TO_REAL) { \
|
|
out[len2] = tmp_dc; \
|
|
if (mod2) \
|
|
out[len4 + 1] = tmp_mid * fact[5]; \
|
|
} else if (mod2) { \
|
|
out[len4] = tmp_mid; \
|
|
} \
|
|
} \
|
|
\
|
|
static const FFTXCodelet TX_NAME(ff_tx_rdft_ ##n## _def) = { \
|
|
.name = TX_NAME_STR("rdft_" #n), \
|
|
.function = TX_NAME(ff_tx_rdft_ ##n), \
|
|
.type = TX_TYPE(RDFT), \
|
|
.flags = AV_TX_UNALIGNED | AV_TX_INPLACE | mode | \
|
|
FF_TX_OUT_OF_PLACE | FF_TX_FORWARD_ONLY, \
|
|
.factors = { 2 + 2*(!mod2), TX_FACTOR_ANY }, \
|
|
.nb_factors = 2, \
|
|
.min_len = 2 + 2*(!mod2), \
|
|
.max_len = TX_LEN_UNLIMITED, \
|
|
.init = TX_NAME(ff_tx_rdft_init), \
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL, \
|
|
.prio = FF_TX_PRIO_BASE, \
|
|
};
|
|
|
|
DECL_RDFT_HALF(r2r, AV_TX_REAL_TO_REAL, 0)
|
|
DECL_RDFT_HALF(r2r_mod2, AV_TX_REAL_TO_REAL, 1)
|
|
DECL_RDFT_HALF(r2i, AV_TX_REAL_TO_IMAGINARY, 0)
|
|
DECL_RDFT_HALF(r2i_mod2, AV_TX_REAL_TO_IMAGINARY, 1)
|
|
|
|
static av_cold int TX_NAME(ff_tx_dct_init)(AVTXContext *s,
|
|
const FFTXCodelet *cd,
|
|
uint64_t flags,
|
|
FFTXCodeletOptions *opts,
|
|
int len, int inv,
|
|
const void *scale)
|
|
{
|
|
int ret;
|
|
double freq;
|
|
TXSample *tab;
|
|
SCALE_TYPE rsc = *((SCALE_TYPE *)scale);
|
|
|
|
if (inv) {
|
|
len *= 2;
|
|
s->len *= 2;
|
|
rsc *= 0.5;
|
|
}
|
|
|
|
if ((ret = ff_tx_init_subtx(s, TX_TYPE(RDFT), flags, NULL, len, inv, &rsc)))
|
|
return ret;
|
|
|
|
s->exp = av_malloc((len/2)*3*sizeof(TXSample));
|
|
if (!s->exp)
|
|
return AVERROR(ENOMEM);
|
|
|
|
tab = (TXSample *)s->exp;
|
|
|
|
freq = M_PI/(len*2);
|
|
|
|
for (int i = 0; i < len; i++)
|
|
tab[i] = RESCALE(cos(i*freq)*(!inv + 1));
|
|
|
|
if (inv) {
|
|
for (int i = 0; i < len/2; i++)
|
|
tab[len + i] = RESCALE(0.5 / sin((2*i + 1)*freq));
|
|
} else {
|
|
for (int i = 0; i < len/2; i++)
|
|
tab[len + i] = RESCALE(cos((len - 2*i - 1)*freq));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_dctII)(AVTXContext *s, void *_dst,
|
|
void *_src, ptrdiff_t stride)
|
|
{
|
|
TXSample *dst = _dst;
|
|
TXSample *src = _src;
|
|
const int len = s->len;
|
|
const int len2 = len >> 1;
|
|
const TXSample *exp = (void *)s->exp;
|
|
TXSample next;
|
|
#ifdef TX_INT32
|
|
int64_t tmp1, tmp2;
|
|
#else
|
|
TXSample tmp1, tmp2;
|
|
#endif
|
|
|
|
for (int i = 0; i < len2; i++) {
|
|
TXSample in1 = src[i];
|
|
TXSample in2 = src[len - i - 1];
|
|
TXSample s = exp[len + i];
|
|
|
|
#ifdef TX_INT32
|
|
tmp1 = in1 + in2;
|
|
tmp2 = in1 - in2;
|
|
|
|
tmp1 >>= 1;
|
|
tmp2 *= s;
|
|
|
|
tmp2 = (tmp2 + 0x40000000) >> 31;
|
|
#else
|
|
tmp1 = (in1 + in2)*0.5;
|
|
tmp2 = (in1 - in2)*s;
|
|
#endif
|
|
|
|
src[i] = tmp1 + tmp2;
|
|
src[len - i - 1] = tmp1 - tmp2;
|
|
}
|
|
|
|
s->fn[0](&s->sub[0], dst, src, sizeof(TXComplex));
|
|
|
|
next = dst[len];
|
|
|
|
for (int i = len - 2; i > 0; i -= 2) {
|
|
TXSample tmp;
|
|
|
|
CMUL(tmp, dst[i], exp[len - i], exp[i], dst[i + 0], dst[i + 1]);
|
|
|
|
dst[i + 1] = next;
|
|
|
|
next += tmp;
|
|
}
|
|
|
|
#ifdef TX_INT32
|
|
tmp1 = ((int64_t)exp[0]) * ((int64_t)dst[0]);
|
|
dst[0] = (tmp1 + 0x40000000) >> 31;
|
|
#else
|
|
dst[0] = exp[0] * dst[0];
|
|
#endif
|
|
dst[1] = next;
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_dctIII)(AVTXContext *s, void *_dst,
|
|
void *_src, ptrdiff_t stride)
|
|
{
|
|
TXSample *dst = _dst;
|
|
TXSample *src = _src;
|
|
const int len = s->len;
|
|
const int len2 = len >> 1;
|
|
const TXSample *exp = (void *)s->exp;
|
|
#ifdef TX_INT32
|
|
int64_t tmp1, tmp2 = src[len - 1];
|
|
tmp2 = (2*tmp2 + 0x40000000) >> 31;
|
|
#else
|
|
TXSample tmp1, tmp2 = 2*src[len - 1];
|
|
#endif
|
|
|
|
src[len] = tmp2;
|
|
|
|
for (int i = len - 2; i >= 2; i -= 2) {
|
|
TXSample val1 = src[i - 0];
|
|
TXSample val2 = src[i - 1] - src[i + 1];
|
|
|
|
CMUL(src[i + 1], src[i], exp[len - i], exp[i], val1, val2);
|
|
}
|
|
|
|
s->fn[0](&s->sub[0], dst, src, sizeof(float));
|
|
|
|
for (int i = 0; i < len2; i++) {
|
|
TXSample in1 = dst[i];
|
|
TXSample in2 = dst[len - i - 1];
|
|
TXSample c = exp[len + i];
|
|
|
|
tmp1 = in1 + in2;
|
|
tmp2 = in1 - in2;
|
|
tmp2 *= c;
|
|
#ifdef TX_INT32
|
|
tmp2 = (tmp2 + 0x40000000) >> 31;
|
|
#endif
|
|
|
|
dst[i] = tmp1 + tmp2;
|
|
dst[len - i - 1] = tmp1 - tmp2;
|
|
}
|
|
}
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_dctII_def) = {
|
|
.name = TX_NAME_STR("dctII"),
|
|
.function = TX_NAME(ff_tx_dctII),
|
|
.type = TX_TYPE(DCT),
|
|
.flags = AV_TX_UNALIGNED | AV_TX_INPLACE |
|
|
FF_TX_OUT_OF_PLACE | FF_TX_FORWARD_ONLY,
|
|
.factors = { 2, TX_FACTOR_ANY },
|
|
.min_len = 2,
|
|
.max_len = TX_LEN_UNLIMITED,
|
|
.init = TX_NAME(ff_tx_dct_init),
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_BASE,
|
|
};
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_dctIII_def) = {
|
|
.name = TX_NAME_STR("dctIII"),
|
|
.function = TX_NAME(ff_tx_dctIII),
|
|
.type = TX_TYPE(DCT),
|
|
.flags = AV_TX_UNALIGNED | AV_TX_INPLACE |
|
|
FF_TX_OUT_OF_PLACE | FF_TX_INVERSE_ONLY,
|
|
.factors = { 2, TX_FACTOR_ANY },
|
|
.min_len = 2,
|
|
.max_len = TX_LEN_UNLIMITED,
|
|
.init = TX_NAME(ff_tx_dct_init),
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_BASE,
|
|
};
|
|
|
|
static av_cold int TX_NAME(ff_tx_dcstI_init)(AVTXContext *s,
|
|
const FFTXCodelet *cd,
|
|
uint64_t flags,
|
|
FFTXCodeletOptions *opts,
|
|
int len, int inv,
|
|
const void *scale)
|
|
{
|
|
int ret;
|
|
SCALE_TYPE rsc = *((SCALE_TYPE *)scale);
|
|
|
|
if (inv) {
|
|
len *= 2;
|
|
s->len *= 2;
|
|
rsc *= 0.5;
|
|
}
|
|
|
|
/* We want a half-complex RDFT */
|
|
flags |= cd->type == TX_TYPE(DCT_I) ? AV_TX_REAL_TO_REAL :
|
|
AV_TX_REAL_TO_IMAGINARY;
|
|
|
|
if ((ret = ff_tx_init_subtx(s, TX_TYPE(RDFT), flags, NULL,
|
|
(len - 1 + 2*(cd->type == TX_TYPE(DST_I)))*2,
|
|
0, &rsc)))
|
|
return ret;
|
|
|
|
s->tmp = av_mallocz((len + 1)*2*sizeof(TXSample));
|
|
if (!s->tmp)
|
|
return AVERROR(ENOMEM);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_dctI)(AVTXContext *s, void *_dst,
|
|
void *_src, ptrdiff_t stride)
|
|
{
|
|
TXSample *dst = _dst;
|
|
TXSample *src = _src;
|
|
const int len = s->len - 1;
|
|
TXSample *tmp = (TXSample *)s->tmp;
|
|
|
|
stride /= sizeof(TXSample);
|
|
|
|
for (int i = 0; i < len; i++)
|
|
tmp[i] = tmp[2*len - i] = src[i * stride];
|
|
|
|
tmp[len] = src[len * stride]; /* Middle */
|
|
|
|
s->fn[0](&s->sub[0], dst, tmp, sizeof(TXSample));
|
|
}
|
|
|
|
static void TX_NAME(ff_tx_dstI)(AVTXContext *s, void *_dst,
|
|
void *_src, ptrdiff_t stride)
|
|
{
|
|
TXSample *dst = _dst;
|
|
TXSample *src = _src;
|
|
const int len = s->len + 1;
|
|
TXSample *tmp = (void *)s->tmp;
|
|
|
|
stride /= sizeof(TXSample);
|
|
|
|
tmp[0] = 0;
|
|
|
|
for (int i = 1; i < len; i++) {
|
|
TXSample a = src[(i - 1) * stride];
|
|
tmp[i] = -a;
|
|
tmp[2*len - i] = a;
|
|
}
|
|
|
|
tmp[len] = 0; /* i == n, Nyquist */
|
|
|
|
s->fn[0](&s->sub[0], dst, tmp, sizeof(float));
|
|
}
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_dctI_def) = {
|
|
.name = TX_NAME_STR("dctI"),
|
|
.function = TX_NAME(ff_tx_dctI),
|
|
.type = TX_TYPE(DCT_I),
|
|
.flags = AV_TX_UNALIGNED | AV_TX_INPLACE | FF_TX_OUT_OF_PLACE,
|
|
.factors = { 2, TX_FACTOR_ANY },
|
|
.nb_factors = 2,
|
|
.min_len = 2,
|
|
.max_len = TX_LEN_UNLIMITED,
|
|
.init = TX_NAME(ff_tx_dcstI_init),
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_BASE,
|
|
};
|
|
|
|
static const FFTXCodelet TX_NAME(ff_tx_dstI_def) = {
|
|
.name = TX_NAME_STR("dstI"),
|
|
.function = TX_NAME(ff_tx_dstI),
|
|
.type = TX_TYPE(DST_I),
|
|
.flags = AV_TX_UNALIGNED | AV_TX_INPLACE | FF_TX_OUT_OF_PLACE,
|
|
.factors = { 2, TX_FACTOR_ANY },
|
|
.nb_factors = 2,
|
|
.min_len = 2,
|
|
.max_len = TX_LEN_UNLIMITED,
|
|
.init = TX_NAME(ff_tx_dcstI_init),
|
|
.cpu_flags = FF_TX_CPU_FLAGS_ALL,
|
|
.prio = FF_TX_PRIO_BASE,
|
|
};
|
|
|
|
int TX_TAB(ff_tx_mdct_gen_exp)(AVTXContext *s, int *pre_tab)
|
|
{
|
|
int off = 0;
|
|
int len4 = s->len >> 1;
|
|
double scale = s->scale_d;
|
|
const double theta = (scale < 0 ? len4 : 0) + 1.0/8.0;
|
|
size_t alloc = pre_tab ? 2*len4 : len4;
|
|
|
|
if (!(s->exp = av_malloc_array(alloc, sizeof(*s->exp))))
|
|
return AVERROR(ENOMEM);
|
|
|
|
scale = sqrt(fabs(scale));
|
|
|
|
if (pre_tab)
|
|
off = len4;
|
|
|
|
for (int i = 0; i < len4; i++) {
|
|
const double alpha = M_PI_2 * (i + theta) / len4;
|
|
s->exp[off + i] = (TXComplex){ RESCALE(cos(alpha) * scale),
|
|
RESCALE(sin(alpha) * scale) };
|
|
}
|
|
|
|
if (pre_tab)
|
|
for (int i = 0; i < len4; i++)
|
|
s->exp[i] = s->exp[len4 + pre_tab[i]];
|
|
|
|
return 0;
|
|
}
|
|
|
|
const FFTXCodelet * const TX_NAME(ff_tx_codelet_list)[] = {
|
|
/* Split-Radix codelets */
|
|
&TX_NAME(ff_tx_fft2_ns_def),
|
|
&TX_NAME(ff_tx_fft4_ns_def),
|
|
&TX_NAME(ff_tx_fft8_ns_def),
|
|
&TX_NAME(ff_tx_fft16_ns_def),
|
|
&TX_NAME(ff_tx_fft32_ns_def),
|
|
&TX_NAME(ff_tx_fft64_ns_def),
|
|
&TX_NAME(ff_tx_fft128_ns_def),
|
|
&TX_NAME(ff_tx_fft256_ns_def),
|
|
&TX_NAME(ff_tx_fft512_ns_def),
|
|
&TX_NAME(ff_tx_fft1024_ns_def),
|
|
&TX_NAME(ff_tx_fft2048_ns_def),
|
|
&TX_NAME(ff_tx_fft4096_ns_def),
|
|
&TX_NAME(ff_tx_fft8192_ns_def),
|
|
&TX_NAME(ff_tx_fft16384_ns_def),
|
|
&TX_NAME(ff_tx_fft32768_ns_def),
|
|
&TX_NAME(ff_tx_fft65536_ns_def),
|
|
&TX_NAME(ff_tx_fft131072_ns_def),
|
|
&TX_NAME(ff_tx_fft262144_ns_def),
|
|
&TX_NAME(ff_tx_fft524288_ns_def),
|
|
&TX_NAME(ff_tx_fft1048576_ns_def),
|
|
&TX_NAME(ff_tx_fft2097152_ns_def),
|
|
|
|
/* Prime factor codelets */
|
|
&TX_NAME(ff_tx_fft3_ns_def),
|
|
&TX_NAME(ff_tx_fft5_ns_def),
|
|
&TX_NAME(ff_tx_fft7_ns_def),
|
|
&TX_NAME(ff_tx_fft9_ns_def),
|
|
&TX_NAME(ff_tx_fft15_ns_def),
|
|
|
|
/* We get these for free */
|
|
&TX_NAME(ff_tx_fft3_fwd_def),
|
|
&TX_NAME(ff_tx_fft5_fwd_def),
|
|
&TX_NAME(ff_tx_fft7_fwd_def),
|
|
&TX_NAME(ff_tx_fft9_fwd_def),
|
|
|
|
/* Standalone transforms */
|
|
&TX_NAME(ff_tx_fft_def),
|
|
&TX_NAME(ff_tx_fft_inplace_def),
|
|
&TX_NAME(ff_tx_fft_inplace_small_def),
|
|
&TX_NAME(ff_tx_fft_pfa_def),
|
|
&TX_NAME(ff_tx_fft_pfa_ns_def),
|
|
&TX_NAME(ff_tx_fft_naive_def),
|
|
&TX_NAME(ff_tx_fft_naive_small_def),
|
|
&TX_NAME(ff_tx_mdct_fwd_def),
|
|
&TX_NAME(ff_tx_mdct_inv_def),
|
|
&TX_NAME(ff_tx_mdct_pfa_3xM_fwd_def),
|
|
&TX_NAME(ff_tx_mdct_pfa_5xM_fwd_def),
|
|
&TX_NAME(ff_tx_mdct_pfa_7xM_fwd_def),
|
|
&TX_NAME(ff_tx_mdct_pfa_9xM_fwd_def),
|
|
&TX_NAME(ff_tx_mdct_pfa_15xM_fwd_def),
|
|
&TX_NAME(ff_tx_mdct_pfa_3xM_inv_def),
|
|
&TX_NAME(ff_tx_mdct_pfa_5xM_inv_def),
|
|
&TX_NAME(ff_tx_mdct_pfa_7xM_inv_def),
|
|
&TX_NAME(ff_tx_mdct_pfa_9xM_inv_def),
|
|
&TX_NAME(ff_tx_mdct_pfa_15xM_inv_def),
|
|
&TX_NAME(ff_tx_mdct_naive_fwd_def),
|
|
&TX_NAME(ff_tx_mdct_naive_inv_def),
|
|
&TX_NAME(ff_tx_mdct_inv_full_def),
|
|
&TX_NAME(ff_tx_rdft_r2c_def),
|
|
&TX_NAME(ff_tx_rdft_r2r_def),
|
|
&TX_NAME(ff_tx_rdft_r2r_mod2_def),
|
|
&TX_NAME(ff_tx_rdft_r2i_def),
|
|
&TX_NAME(ff_tx_rdft_r2i_mod2_def),
|
|
&TX_NAME(ff_tx_rdft_c2r_def),
|
|
&TX_NAME(ff_tx_dctII_def),
|
|
&TX_NAME(ff_tx_dctIII_def),
|
|
&TX_NAME(ff_tx_dctI_def),
|
|
&TX_NAME(ff_tx_dstI_def),
|
|
|
|
NULL,
|
|
};
|