1 /* Copyright (c) 2015 Xiph.Org Foundation
2 Written by Viswanath Puttagunta */
3 /**
4 @file celt_ne10_fft.c
5 @brief ARM Neon optimizations for fft using NE10 library
6 */
7
8 /*
9 Redistribution and use in source and binary forms, with or without
10 modification, are permitted provided that the following conditions
11 are met:
12
13 - Redistributions of source code must retain the above copyright
14 notice, this list of conditions and the following disclaimer.
15
16 - Redistributions in binary form must reproduce the above copyright
17 notice, this list of conditions and the following disclaimer in the
18 documentation and/or other materials provided with the distribution.
19
20 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
24 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #ifndef SKIP_CONFIG_H
34 #ifdef HAVE_CONFIG_H
35 #include "config.h"
36 #endif
37 #endif
38
39 #include <NE10_init.h>
40 #include <NE10_dsp.h>
41 #include "os_support.h"
42 #include "kiss_fft.h"
43 #include "stack_alloc.h"
44
45 #if !defined(FIXED_POINT)
46 # define NE10_FFT_ALLOC_C2C_TYPE_NEON ne10_fft_alloc_c2c_float32_neon
47 # define NE10_FFT_CFG_TYPE_T ne10_fft_cfg_float32_t
48 # define NE10_FFT_STATE_TYPE_T ne10_fft_state_float32_t
49 # define NE10_FFT_DESTROY_C2C_TYPE ne10_fft_destroy_c2c_float32
50 # define NE10_FFT_CPX_TYPE_T ne10_fft_cpx_float32_t
51 # define NE10_FFT_C2C_1D_TYPE_NEON ne10_fft_c2c_1d_float32_neon
52 #else
53 # define NE10_FFT_ALLOC_C2C_TYPE_NEON(nfft) ne10_fft_alloc_c2c_int32_neon(nfft)
54 # define NE10_FFT_CFG_TYPE_T ne10_fft_cfg_int32_t
55 # define NE10_FFT_STATE_TYPE_T ne10_fft_state_int32_t
56 # define NE10_FFT_DESTROY_C2C_TYPE ne10_fft_destroy_c2c_int32
57 # define NE10_FFT_DESTROY_C2C_TYPE ne10_fft_destroy_c2c_int32
58 # define NE10_FFT_CPX_TYPE_T ne10_fft_cpx_int32_t
59 # define NE10_FFT_C2C_1D_TYPE_NEON ne10_fft_c2c_1d_int32_neon
60 #endif
61
62 #if defined(CUSTOM_MODES)
63
64 /* nfft lengths in NE10 that support scaled fft */
65 # define NE10_FFTSCALED_SUPPORT_MAX 4
66 static const int ne10_fft_scaled_support[NE10_FFTSCALED_SUPPORT_MAX] = {
67 480, 240, 120, 60
68 };
69
opus_fft_alloc_arm_neon(kiss_fft_state * st)70 int opus_fft_alloc_arm_neon(kiss_fft_state *st)
71 {
72 int i;
73 size_t memneeded = sizeof(struct arch_fft_state);
74
75 st->arch_fft = (arch_fft_state *)opus_alloc(memneeded);
76 if (!st->arch_fft)
77 return -1;
78
79 for (i = 0; i < NE10_FFTSCALED_SUPPORT_MAX; i++) {
80 if(st->nfft == ne10_fft_scaled_support[i])
81 break;
82 }
83 if (i == NE10_FFTSCALED_SUPPORT_MAX) {
84 /* This nfft length (scaled fft) is not supported in NE10 */
85 st->arch_fft->is_supported = 0;
86 st->arch_fft->priv = NULL;
87 }
88 else {
89 st->arch_fft->is_supported = 1;
90 st->arch_fft->priv = (void *)NE10_FFT_ALLOC_C2C_TYPE_NEON(st->nfft);
91 if (st->arch_fft->priv == NULL) {
92 return -1;
93 }
94 }
95 return 0;
96 }
97
opus_fft_free_arm_neon(kiss_fft_state * st)98 void opus_fft_free_arm_neon(kiss_fft_state *st)
99 {
100 NE10_FFT_CFG_TYPE_T cfg;
101
102 if (!st->arch_fft)
103 return;
104
105 cfg = (NE10_FFT_CFG_TYPE_T)st->arch_fft->priv;
106 if (cfg)
107 NE10_FFT_DESTROY_C2C_TYPE(cfg);
108 opus_free(st->arch_fft);
109 }
110 #endif
111
opus_fft_neon(const kiss_fft_state * st,const kiss_fft_cpx * fin,kiss_fft_cpx * fout)112 void opus_fft_neon(const kiss_fft_state *st,
113 const kiss_fft_cpx *fin,
114 kiss_fft_cpx *fout)
115 {
116 NE10_FFT_STATE_TYPE_T state;
117 NE10_FFT_CFG_TYPE_T cfg = &state;
118 VARDECL(NE10_FFT_CPX_TYPE_T, buffer);
119 SAVE_STACK;
120 ALLOC(buffer, st->nfft, NE10_FFT_CPX_TYPE_T);
121
122 if (!st->arch_fft->is_supported) {
123 /* This nfft length (scaled fft) not supported in NE10 */
124 opus_fft_c(st, fin, fout);
125 }
126 else {
127 memcpy((void *)cfg, st->arch_fft->priv, sizeof(NE10_FFT_STATE_TYPE_T));
128 state.buffer = (NE10_FFT_CPX_TYPE_T *)&buffer[0];
129 #if !defined(FIXED_POINT)
130 state.is_forward_scaled = 1;
131
132 NE10_FFT_C2C_1D_TYPE_NEON((NE10_FFT_CPX_TYPE_T *)fout,
133 (NE10_FFT_CPX_TYPE_T *)fin,
134 cfg, 0);
135 #else
136 NE10_FFT_C2C_1D_TYPE_NEON((NE10_FFT_CPX_TYPE_T *)fout,
137 (NE10_FFT_CPX_TYPE_T *)fin,
138 cfg, 0, 1);
139 #endif
140 }
141 RESTORE_STACK;
142 }
143
opus_ifft_neon(const kiss_fft_state * st,const kiss_fft_cpx * fin,kiss_fft_cpx * fout)144 void opus_ifft_neon(const kiss_fft_state *st,
145 const kiss_fft_cpx *fin,
146 kiss_fft_cpx *fout)
147 {
148 NE10_FFT_STATE_TYPE_T state;
149 NE10_FFT_CFG_TYPE_T cfg = &state;
150 VARDECL(NE10_FFT_CPX_TYPE_T, buffer);
151 SAVE_STACK;
152 ALLOC(buffer, st->nfft, NE10_FFT_CPX_TYPE_T);
153
154 if (!st->arch_fft->is_supported) {
155 /* This nfft length (scaled fft) not supported in NE10 */
156 opus_ifft_c(st, fin, fout);
157 }
158 else {
159 memcpy((void *)cfg, st->arch_fft->priv, sizeof(NE10_FFT_STATE_TYPE_T));
160 state.buffer = (NE10_FFT_CPX_TYPE_T *)&buffer[0];
161 #if !defined(FIXED_POINT)
162 state.is_backward_scaled = 0;
163
164 NE10_FFT_C2C_1D_TYPE_NEON((NE10_FFT_CPX_TYPE_T *)fout,
165 (NE10_FFT_CPX_TYPE_T *)fin,
166 cfg, 1);
167 #else
168 NE10_FFT_C2C_1D_TYPE_NEON((NE10_FFT_CPX_TYPE_T *)fout,
169 (NE10_FFT_CPX_TYPE_T *)fin,
170 cfg, 1, 0);
171 #endif
172 }
173 RESTORE_STACK;
174 }
175