FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/sbrdsp.c
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 99 99 100.0%
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1 /*
2 * AAC Spectral Band Replication decoding functions
3 * Copyright (c) 2008-2009 Robert Swain ( rob opendot cl )
4 * Copyright (c) 2009-2010 Alex Converse <alex.converse@gmail.com>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #define USE_FIXED 0
24
25 #include "aac.h"
26 #include "config.h"
27 #include "libavutil/attributes.h"
28 #include "libavutil/intfloat.h"
29 #include "sbrdsp.h"
30
31 251188 static float sbr_sum_square_c(float (*x)[2], int n)
32 {
33 251188 float sum0 = 0.0f, sum1 = 0.0f;
34 int i;
35
36
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 3003652 for (i = 0; i < n; i += 2)
37 {
38 2752464 sum0 += x[i + 0][0] * x[i + 0][0];
39 2752464 sum1 += x[i + 0][1] * x[i + 0][1];
40 2752464 sum0 += x[i + 1][0] * x[i + 1][0];
41 2752464 sum1 += x[i + 1][1] * x[i + 1][1];
42 }
43
44 251188 return sum0 + sum1;
45 }
46
47 355459 static void sbr_neg_odd_64_c(float *x)
48 {
49 355459 union av_intfloat32 *xi = (union av_intfloat32*) x;
50 int i;
51
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 6042803 for (i = 1; i < 64; i += 4) {
52 5687344 xi[i + 0].i ^= 1U << 31;
53 5687344 xi[i + 2].i ^= 1U << 31;
54 }
55 355459 }
56
57 365091 static void sbr_qmf_pre_shuffle_c(float *z)
58 {
59 365091 union av_intfloat32 *zi = (union av_intfloat32*) z;
60 int k;
61 365091 zi[64].i = zi[0].i;
62 365091 zi[65].i = zi[1].i;
63
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 5841456 for (k = 1; k < 31; k += 2) {
64 5476365 zi[64 + 2 * k + 0].i = zi[64 - k].i ^ (1U << 31);
65 5476365 zi[64 + 2 * k + 1].i = zi[ k + 1].i;
66 5476365 zi[64 + 2 * k + 2].i = zi[63 - k].i ^ (1U << 31);
67 5476365 zi[64 + 2 * k + 3].i = zi[ k + 2].i;
68 }
69
70 365091 zi[64 + 2 * 31 + 0].i = zi[64 - 31].i ^ (1U << 31);
71 365091 zi[64 + 2 * 31 + 1].i = zi[31 + 1].i;
72 365091 }
73
74 365091 static void sbr_qmf_post_shuffle_c(float W[32][2], const float *z)
75 {
76 365091 const union av_intfloat32 *zi = (const union av_intfloat32*) z;
77 365091 union av_intfloat32 *Wi = (union av_intfloat32*) W;
78 int k;
79
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 6206547 for (k = 0; k < 32; k += 2) {
80 5841456 Wi[2 * k + 0].i = zi[63 - k].i ^ (1U << 31);
81 5841456 Wi[2 * k + 1].i = zi[ k + 0].i;
82 5841456 Wi[2 * k + 2].i = zi[62 - k].i ^ (1U << 31);
83 5841456 Wi[2 * k + 3].i = zi[ k + 1].i;
84 }
85 365091 }
86
87 73603 static void sbr_qmf_deint_neg_c(float *v, const float *src)
88 {
89 73603 const union av_intfloat32 *si = (const union av_intfloat32*)src;
90 73603 union av_intfloat32 *vi = (union av_intfloat32*)v;
91 int i;
92
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 2428899 for (i = 0; i < 32; i++) {
93 2355296 vi[ i].i = si[63 - 2 * i ].i;
94 2355296 vi[63 - i].i = si[63 - 2 * i - 1].i ^ (1U << 31);
95 }
96 73603 }
97
98 #if 0
99 /* This code is slower because it multiplies memory accesses.
100 * It is left for educational purposes and because it may offer
101 * a better reference for writing arch-specific DSP functions. */
102 static av_always_inline void autocorrelate(const float x[40][2],
103 float phi[3][2][2], int lag)
104 {
105 int i;
106 float real_sum = 0.0f;
107 float imag_sum = 0.0f;
108 if (lag) {
109 for (i = 1; i < 38; i++) {
110 real_sum += x[i][0] * x[i+lag][0] + x[i][1] * x[i+lag][1];
111 imag_sum += x[i][0] * x[i+lag][1] - x[i][1] * x[i+lag][0];
112 }
113 phi[2-lag][1][0] = real_sum + x[ 0][0] * x[lag][0] + x[ 0][1] * x[lag][1];
114 phi[2-lag][1][1] = imag_sum + x[ 0][0] * x[lag][1] - x[ 0][1] * x[lag][0];
115 if (lag == 1) {
116 phi[0][0][0] = real_sum + x[38][0] * x[39][0] + x[38][1] * x[39][1];
117 phi[0][0][1] = imag_sum + x[38][0] * x[39][1] - x[38][1] * x[39][0];
118 }
119 } else {
120 for (i = 1; i < 38; i++) {
121 real_sum += x[i][0] * x[i][0] + x[i][1] * x[i][1];
122 }
123 phi[2][1][0] = real_sum + x[ 0][0] * x[ 0][0] + x[ 0][1] * x[ 0][1];
124 phi[1][0][0] = real_sum + x[38][0] * x[38][0] + x[38][1] * x[38][1];
125 }
126 }
127
128 static void sbr_autocorrelate_c(const float x[40][2], float phi[3][2][2])
129 {
130 autocorrelate(x, phi, 0);
131 autocorrelate(x, phi, 1);
132 autocorrelate(x, phi, 2);
133 }
134 #else
135 124327 static void sbr_autocorrelate_c(const float x[40][2], float phi[3][2][2])
136 {
137 124327 float real_sum2 = x[0][0] * x[2][0] + x[0][1] * x[2][1];
138 124327 float imag_sum2 = x[0][0] * x[2][1] - x[0][1] * x[2][0];
139 124327 float real_sum1 = 0.0f, imag_sum1 = 0.0f, real_sum0 = 0.0f;
140 int i;
141
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 4724426 for (i = 1; i < 38; i++) {
142 4600099 real_sum0 += x[i][0] * x[i ][0] + x[i][1] * x[i ][1];
143 4600099 real_sum1 += x[i][0] * x[i + 1][0] + x[i][1] * x[i + 1][1];
144 4600099 imag_sum1 += x[i][0] * x[i + 1][1] - x[i][1] * x[i + 1][0];
145 4600099 real_sum2 += x[i][0] * x[i + 2][0] + x[i][1] * x[i + 2][1];
146 4600099 imag_sum2 += x[i][0] * x[i + 2][1] - x[i][1] * x[i + 2][0];
147 }
148 124327 phi[2 - 2][1][0] = real_sum2;
149 124327 phi[2 - 2][1][1] = imag_sum2;
150 124327 phi[2 ][1][0] = real_sum0 + x[ 0][0] * x[ 0][0] + x[ 0][1] * x[ 0][1];
151 124327 phi[1 ][0][0] = real_sum0 + x[38][0] * x[38][0] + x[38][1] * x[38][1];
152 124327 phi[2 - 1][1][0] = real_sum1 + x[ 0][0] * x[ 1][0] + x[ 0][1] * x[ 1][1];
153 124327 phi[2 - 1][1][1] = imag_sum1 + x[ 0][0] * x[ 1][1] - x[ 0][1] * x[ 1][0];
154 124327 phi[0 ][0][0] = real_sum1 + x[38][0] * x[39][0] + x[38][1] * x[39][1];
155 124327 phi[0 ][0][1] = imag_sum1 + x[38][0] * x[39][1] - x[38][1] * x[39][0];
156 124327 }
157 #endif
158
159 172098 static void sbr_hf_gen_c(float (*X_high)[2], const float (*X_low)[2],
160 const float alpha0[2], const float alpha1[2],
161 float bw, int start, int end)
162 {
163 float alpha[4];
164 int i;
165
166 172098 alpha[0] = alpha1[0] * bw * bw;
167 172098 alpha[1] = alpha1[1] * bw * bw;
168 172098 alpha[2] = alpha0[0] * bw;
169 172098 alpha[3] = alpha0[1] * bw;
170
171
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 5685186 for (i = start; i < end; i++) {
172 5513088 X_high[i][0] =
173 5513088 X_low[i - 2][0] * alpha[0] -
174 5513088 X_low[i - 2][1] * alpha[1] +
175 5513088 X_low[i - 1][0] * alpha[2] -
176 5513088 X_low[i - 1][1] * alpha[3] +
177 5513088 X_low[i][0];
178 5513088 X_high[i][1] =
179 5513088 X_low[i - 2][1] * alpha[0] +
180 5513088 X_low[i - 2][0] * alpha[1] +
181 5513088 X_low[i - 1][1] * alpha[2] +
182 5513088 X_low[i - 1][0] * alpha[3] +
183 5513088 X_low[i][1];
184 }
185 172098 }
186
187 212195 static void sbr_hf_g_filt_c(float (*Y)[2], const float (*X_high)[40][2],
188 const float *g_filt, int m_max, intptr_t ixh)
189 {
190 int m;
191
192
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 5716739 for (m = 0; m < m_max; m++) {
193 5504544 Y[m][0] = X_high[m][ixh][0] * g_filt[m];
194 5504544 Y[m][1] = X_high[m][ixh][1] * g_filt[m];
195 }
196 212195 }
197
198 209994 static av_always_inline void sbr_hf_apply_noise(float (*Y)[2],
199 const float *s_m,
200 const float *q_filt,
201 int noise,
202 float phi_sign0,
203 float phi_sign1,
204 int m_max)
205 {
206 int m;
207
208
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 5659882 for (m = 0; m < m_max; m++) {
209 5449888 float y0 = Y[m][0];
210 5449888 float y1 = Y[m][1];
211 5449888 noise = (noise + 1) & 0x1ff;
212
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 5449888 if (s_m[m]) {
213 39374 y0 += s_m[m] * phi_sign0;
214 39374 y1 += s_m[m] * phi_sign1;
215 } else {
216 5410514 y0 += q_filt[m] * ff_sbr_noise_table[noise][0];
217 5410514 y1 += q_filt[m] * ff_sbr_noise_table[noise][1];
218 }
219 5449888 Y[m][0] = y0;
220 5449888 Y[m][1] = y1;
221 5449888 phi_sign1 = -phi_sign1;
222 }
223 209994 }
224
225 #include "sbrdsp_template.c"
226