d9a291f641
Took the opportunity to undo the Godot changed made to the opus source. The opus module should eventually be built in its own environment to avoid polluting others with too many include dirs and defines. TODO: Fix the platform/ stuff for opus.
175 lines
5.6 KiB
C
175 lines
5.6 KiB
C
/* Copyright (c) 2015 Xiph.Org Foundation
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Written by Viswanath Puttagunta */
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/**
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@file celt_ne10_fft.c
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@brief ARM Neon optimizations for fft using NE10 library
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*/
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SKIP_CONFIG_H
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#endif
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#include <NE10_init.h>
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#include <NE10_dsp.h>
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#include "os_support.h"
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#include "kiss_fft.h"
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#include "stack_alloc.h"
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#if !defined(FIXED_POINT)
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# define NE10_FFT_ALLOC_C2C_TYPE_NEON ne10_fft_alloc_c2c_float32_neon
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# define NE10_FFT_CFG_TYPE_T ne10_fft_cfg_float32_t
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# define NE10_FFT_STATE_TYPE_T ne10_fft_state_float32_t
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# define NE10_FFT_DESTROY_C2C_TYPE ne10_fft_destroy_c2c_float32
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# define NE10_FFT_CPX_TYPE_T ne10_fft_cpx_float32_t
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# define NE10_FFT_C2C_1D_TYPE_NEON ne10_fft_c2c_1d_float32_neon
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#else
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# define NE10_FFT_ALLOC_C2C_TYPE_NEON(nfft) ne10_fft_alloc_c2c_int32_neon(nfft)
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# define NE10_FFT_CFG_TYPE_T ne10_fft_cfg_int32_t
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# define NE10_FFT_STATE_TYPE_T ne10_fft_state_int32_t
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# define NE10_FFT_DESTROY_C2C_TYPE ne10_fft_destroy_c2c_int32
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# define NE10_FFT_DESTROY_C2C_TYPE ne10_fft_destroy_c2c_int32
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# define NE10_FFT_CPX_TYPE_T ne10_fft_cpx_int32_t
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# define NE10_FFT_C2C_1D_TYPE_NEON ne10_fft_c2c_1d_int32_neon
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#endif
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#if defined(CUSTOM_MODES)
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/* nfft lengths in NE10 that support scaled fft */
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# define NE10_FFTSCALED_SUPPORT_MAX 4
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static const int ne10_fft_scaled_support[NE10_FFTSCALED_SUPPORT_MAX] = {
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480, 240, 120, 60
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};
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int opus_fft_alloc_arm_neon(kiss_fft_state *st)
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{
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int i;
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size_t memneeded = sizeof(struct arch_fft_state);
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st->arch_fft = (arch_fft_state *)opus_alloc(memneeded);
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if (!st->arch_fft)
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return -1;
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for (i = 0; i < NE10_FFTSCALED_SUPPORT_MAX; i++) {
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if(st->nfft == ne10_fft_scaled_support[i])
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break;
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}
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if (i == NE10_FFTSCALED_SUPPORT_MAX) {
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/* This nfft length (scaled fft) is not supported in NE10 */
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st->arch_fft->is_supported = 0;
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st->arch_fft->priv = NULL;
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}
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else {
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st->arch_fft->is_supported = 1;
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st->arch_fft->priv = (void *)NE10_FFT_ALLOC_C2C_TYPE_NEON(st->nfft);
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if (st->arch_fft->priv == NULL) {
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return -1;
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}
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}
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return 0;
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}
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void opus_fft_free_arm_neon(kiss_fft_state *st)
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{
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NE10_FFT_CFG_TYPE_T cfg;
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if (!st->arch_fft)
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return;
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cfg = (NE10_FFT_CFG_TYPE_T)st->arch_fft->priv;
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if (cfg)
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NE10_FFT_DESTROY_C2C_TYPE(cfg);
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opus_free(st->arch_fft);
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}
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#endif
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void opus_fft_neon(const kiss_fft_state *st,
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const kiss_fft_cpx *fin,
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kiss_fft_cpx *fout)
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{
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NE10_FFT_STATE_TYPE_T state;
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NE10_FFT_CFG_TYPE_T cfg = &state;
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VARDECL(NE10_FFT_CPX_TYPE_T, buffer);
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SAVE_STACK;
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ALLOC(buffer, st->nfft, NE10_FFT_CPX_TYPE_T);
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if (!st->arch_fft->is_supported) {
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/* This nfft length (scaled fft) not supported in NE10 */
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opus_fft_c(st, fin, fout);
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}
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else {
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memcpy((void *)cfg, st->arch_fft->priv, sizeof(NE10_FFT_STATE_TYPE_T));
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state.buffer = (NE10_FFT_CPX_TYPE_T *)&buffer[0];
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#if !defined(FIXED_POINT)
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state.is_forward_scaled = 1;
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NE10_FFT_C2C_1D_TYPE_NEON((NE10_FFT_CPX_TYPE_T *)fout,
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(NE10_FFT_CPX_TYPE_T *)fin,
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cfg, 0);
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#else
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NE10_FFT_C2C_1D_TYPE_NEON((NE10_FFT_CPX_TYPE_T *)fout,
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(NE10_FFT_CPX_TYPE_T *)fin,
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cfg, 0, 1);
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#endif
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}
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RESTORE_STACK;
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}
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void opus_ifft_neon(const kiss_fft_state *st,
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const kiss_fft_cpx *fin,
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kiss_fft_cpx *fout)
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{
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NE10_FFT_STATE_TYPE_T state;
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NE10_FFT_CFG_TYPE_T cfg = &state;
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VARDECL(NE10_FFT_CPX_TYPE_T, buffer);
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SAVE_STACK;
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ALLOC(buffer, st->nfft, NE10_FFT_CPX_TYPE_T);
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if (!st->arch_fft->is_supported) {
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/* This nfft length (scaled fft) not supported in NE10 */
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opus_ifft_c(st, fin, fout);
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}
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else {
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memcpy((void *)cfg, st->arch_fft->priv, sizeof(NE10_FFT_STATE_TYPE_T));
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state.buffer = (NE10_FFT_CPX_TYPE_T *)&buffer[0];
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#if !defined(FIXED_POINT)
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state.is_backward_scaled = 0;
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NE10_FFT_C2C_1D_TYPE_NEON((NE10_FFT_CPX_TYPE_T *)fout,
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(NE10_FFT_CPX_TYPE_T *)fin,
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cfg, 1);
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#else
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NE10_FFT_C2C_1D_TYPE_NEON((NE10_FFT_CPX_TYPE_T *)fout,
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(NE10_FFT_CPX_TYPE_T *)fin,
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cfg, 1, 0);
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#endif
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}
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RESTORE_STACK;
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}
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