FFmpeg  4.3
sbrdsp.c
Go to the documentation of this file.
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 static float sbr_sum_square_c(float (*x)[2], int n)
32 {
33  float sum0 = 0.0f, sum1 = 0.0f;
34  int i;
35 
36  for (i = 0; i < n; i += 2)
37  {
38  sum0 += x[i + 0][0] * x[i + 0][0];
39  sum1 += x[i + 0][1] * x[i + 0][1];
40  sum0 += x[i + 1][0] * x[i + 1][0];
41  sum1 += x[i + 1][1] * x[i + 1][1];
42  }
43 
44  return sum0 + sum1;
45 }
46 
47 static void sbr_neg_odd_64_c(float *x)
48 {
49  union av_intfloat32 *xi = (union av_intfloat32*) x;
50  int i;
51  for (i = 1; i < 64; i += 4) {
52  xi[i + 0].i ^= 1U << 31;
53  xi[i + 2].i ^= 1U << 31;
54  }
55 }
56 
57 static void sbr_qmf_pre_shuffle_c(float *z)
58 {
59  union av_intfloat32 *zi = (union av_intfloat32*) z;
60  int k;
61  zi[64].i = zi[0].i;
62  zi[65].i = zi[1].i;
63  for (k = 1; k < 31; k += 2) {
64  zi[64 + 2 * k + 0].i = zi[64 - k].i ^ (1U << 31);
65  zi[64 + 2 * k + 1].i = zi[ k + 1].i;
66  zi[64 + 2 * k + 2].i = zi[63 - k].i ^ (1U << 31);
67  zi[64 + 2 * k + 3].i = zi[ k + 2].i;
68  }
69 
70  zi[64 + 2 * 31 + 0].i = zi[64 - 31].i ^ (1U << 31);
71  zi[64 + 2 * 31 + 1].i = zi[31 + 1].i;
72 }
73 
74 static void sbr_qmf_post_shuffle_c(float W[32][2], const float *z)
75 {
76  const union av_intfloat32 *zi = (const union av_intfloat32*) z;
77  union av_intfloat32 *Wi = (union av_intfloat32*) W;
78  int k;
79  for (k = 0; k < 32; k += 2) {
80  Wi[2 * k + 0].i = zi[63 - k].i ^ (1U << 31);
81  Wi[2 * k + 1].i = zi[ k + 0].i;
82  Wi[2 * k + 2].i = zi[62 - k].i ^ (1U << 31);
83  Wi[2 * k + 3].i = zi[ k + 1].i;
84  }
85 }
86 
87 static void sbr_qmf_deint_neg_c(float *v, const float *src)
88 {
89  const union av_intfloat32 *si = (const union av_intfloat32*)src;
90  union av_intfloat32 *vi = (union av_intfloat32*)v;
91  int i;
92  for (i = 0; i < 32; i++) {
93  vi[ i].i = si[63 - 2 * i ].i;
94  vi[63 - i].i = si[63 - 2 * i - 1].i ^ (1U << 31);
95  }
96 }
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 static void sbr_autocorrelate_c(const float x[40][2], float phi[3][2][2])
136 {
137  float real_sum2 = x[0][0] * x[2][0] + x[0][1] * x[2][1];
138  float imag_sum2 = x[0][0] * x[2][1] - x[0][1] * x[2][0];
139  float real_sum1 = 0.0f, imag_sum1 = 0.0f, real_sum0 = 0.0f;
140  int i;
141  for (i = 1; i < 38; i++) {
142  real_sum0 += x[i][0] * x[i ][0] + x[i][1] * x[i ][1];
143  real_sum1 += x[i][0] * x[i + 1][0] + x[i][1] * x[i + 1][1];
144  imag_sum1 += x[i][0] * x[i + 1][1] - x[i][1] * x[i + 1][0];
145  real_sum2 += x[i][0] * x[i + 2][0] + x[i][1] * x[i + 2][1];
146  imag_sum2 += x[i][0] * x[i + 2][1] - x[i][1] * x[i + 2][0];
147  }
148  phi[2 - 2][1][0] = real_sum2;
149  phi[2 - 2][1][1] = imag_sum2;
150  phi[2 ][1][0] = real_sum0 + x[ 0][0] * x[ 0][0] + x[ 0][1] * x[ 0][1];
151  phi[1 ][0][0] = real_sum0 + x[38][0] * x[38][0] + x[38][1] * x[38][1];
152  phi[2 - 1][1][0] = real_sum1 + x[ 0][0] * x[ 1][0] + x[ 0][1] * x[ 1][1];
153  phi[2 - 1][1][1] = imag_sum1 + x[ 0][0] * x[ 1][1] - x[ 0][1] * x[ 1][0];
154  phi[0 ][0][0] = real_sum1 + x[38][0] * x[39][0] + x[38][1] * x[39][1];
155  phi[0 ][0][1] = imag_sum1 + x[38][0] * x[39][1] - x[38][1] * x[39][0];
156 }
157 #endif
158 
159 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  alpha[0] = alpha1[0] * bw * bw;
167  alpha[1] = alpha1[1] * bw * bw;
168  alpha[2] = alpha0[0] * bw;
169  alpha[3] = alpha0[1] * bw;
170 
171  for (i = start; i < end; i++) {
172  X_high[i][0] =
173  X_low[i - 2][0] * alpha[0] -
174  X_low[i - 2][1] * alpha[1] +
175  X_low[i - 1][0] * alpha[2] -
176  X_low[i - 1][1] * alpha[3] +
177  X_low[i][0];
178  X_high[i][1] =
179  X_low[i - 2][1] * alpha[0] +
180  X_low[i - 2][0] * alpha[1] +
181  X_low[i - 1][1] * alpha[2] +
182  X_low[i - 1][0] * alpha[3] +
183  X_low[i][1];
184  }
185 }
186 
187 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  for (m = 0; m < m_max; m++) {
193  Y[m][0] = X_high[m][ixh][0] * g_filt[m];
194  Y[m][1] = X_high[m][ixh][1] * g_filt[m];
195  }
196 }
197 
198 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  for (m = 0; m < m_max; m++) {
209  float y0 = Y[m][0];
210  float y1 = Y[m][1];
211  noise = (noise + 1) & 0x1ff;
212  if (s_m[m]) {
213  y0 += s_m[m] * phi_sign0;
214  y1 += s_m[m] * phi_sign1;
215  } else {
216  y0 += q_filt[m] * ff_sbr_noise_table[noise][0];
217  y1 += q_filt[m] * ff_sbr_noise_table[noise][1];
218  }
219  Y[m][0] = y0;
220  Y[m][1] = y1;
221  phi_sign1 = -phi_sign1;
222  }
223 }
224 
225 #include "sbrdsp_template.c"
W
@ W
Definition: vf_addroi.c:26
end
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
av_intfloat32::i
uint32_t i
Definition: intfloat.h:28
intfloat.h
U
#define U(x)
Definition: vp56_arith.h:37
x
FFmpeg Automated Testing Environment ************************************Introduction Using FATE from your FFmpeg source directory Submitting the results to the FFmpeg result aggregation server Uploading new samples to the fate suite FATE makefile targets and variables Makefile targets Makefile variables Examples Introduction **************FATE is an extended regression suite on the client side and a means for results aggregation and presentation on the server side The first part of this document explains how you can use FATE from your FFmpeg source directory to test your ffmpeg binary The second part describes how you can run FATE to submit the results to FFmpeg’s FATE server In any way you can have a look at the publicly viewable FATE results by visiting this as it can be seen if some test on some platform broke with their recent contribution This usually happens on the platforms the developers could not test on The second part of this document describes how you can run FATE to submit your results to FFmpeg’s FATE server If you want to submit your results be sure to check that your combination of OS and compiler is not already listed on the above mentioned website In the third part you can find a comprehensive listing of FATE makefile targets and variables Using FATE from your FFmpeg source directory **********************************************If you want to run FATE on your machine you need to have the samples in place You can get the samples via the build target fate rsync Use this command from the top level source this will cause FATE to fail NOTE To use a custom wrapper to run the pass ‘ target exec’ to ‘configure’ or set the TARGET_EXEC Make variable Submitting the results to the FFmpeg result aggregation server ****************************************************************To submit your results to the server you should run fate through the shell script ‘tests fate sh’ from the FFmpeg sources This script needs to be invoked with a configuration file as its first argument tests fate sh path to fate_config A configuration file template with comments describing the individual configuration variables can be found at ‘doc fate_config sh template’ Create a configuration that suits your based on the configuration template The ‘slot’ configuration variable can be any string that is not yet but it is suggested that you name it adhering to the following pattern ‘ARCH OS COMPILER COMPILER VERSION’ The configuration file itself will be sourced in a shell therefore all shell features may be used This enables you to setup the environment as you need it for your build For your first test runs the ‘fate_recv’ variable should be empty or commented out This will run everything as normal except that it will omit the submission of the results to the server The following files should be present in $workdir as specified in the configuration it may help to try out the ‘ssh’ command with one or more ‘ v’ options You should get detailed output concerning your SSH configuration and the authentication process The only thing left is to automate the execution of the fate sh script and the synchronisation of the samples directory Uploading new samples to the fate suite *****************************************If you need a sample uploaded send a mail to samples request This is for developers who have an account on the fate suite server If you upload new please make sure they are as small as space on each network bandwidth and so on benefit from smaller test cases Also keep in mind older checkouts use existing sample that means in practice generally do not remove or overwrite files as it likely would break older checkouts or releases Also all needed samples for a commit should be ideally before the push If you need an account for frequently uploading samples or you wish to help others by doing that send a mail to ffmpeg devel rsync vauL Duo x
Definition: fate.txt:150
autocorrelate
static av_always_inline void autocorrelate(const int x[40][2], SoftFloat phi[3][2][2], int lag)
Definition: sbrdsp_fixed.c:146
sbr_hf_gen_c
static void sbr_hf_gen_c(float(*X_high)[2], const float(*X_low)[2], const float alpha0[2], const float alpha1[2], float bw, int start, int end)
Definition: sbrdsp.c:159
xi
#define xi(width, name, var, range_min, range_max, subs,...)
Definition: cbs_h2645.c:396
sbr_qmf_pre_shuffle_c
static void sbr_qmf_pre_shuffle_c(float *z)
Definition: sbrdsp.c:57
src
#define src
Definition: vp8dsp.c:254
aac.h
av_intfloat32
Definition: intfloat.h:27
sbr_qmf_deint_neg_c
static void sbr_qmf_deint_neg_c(float *v, const float *src)
Definition: sbrdsp.c:87
ff_sbr_noise_table
const INTFLOAT ff_sbr_noise_table[][2]
Definition: aacsbrdata.h:271
sbr_hf_apply_noise
static av_always_inline void sbr_hf_apply_noise(float(*Y)[2], const float *s_m, const float *q_filt, int noise, float phi_sign0, float phi_sign1, int m_max)
Definition: sbrdsp.c:198
sbrdsp.h
sbr_sum_square_c
static float sbr_sum_square_c(float(*x)[2], int n)
Definition: sbrdsp.c:31
attributes.h
sbr_autocorrelate_c
static void sbr_autocorrelate_c(const float x[40][2], float phi[3][2][2])
Definition: sbrdsp.c:135
Y
#define Y
Definition: boxblur.h:38
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
av_always_inline
#define av_always_inline
Definition: attributes.h:49
sbr_qmf_post_shuffle_c
static void sbr_qmf_post_shuffle_c(float W[32][2], const float *z)
Definition: sbrdsp.c:74
sbr_hf_g_filt_c
static void sbr_hf_g_filt_c(float(*Y)[2], const float(*X_high)[40][2], const float *g_filt, int m_max, intptr_t ixh)
Definition: sbrdsp.c:187
noise
static int noise(AVBSFContext *ctx, AVPacket *pkt)
Definition: noise_bsf.c:36
config.h
alpha
static const int16_t alpha[]
Definition: ilbcdata.h:55
sbrdsp_template.c
sbr_neg_odd_64_c
static void sbr_neg_odd_64_c(float *x)
Definition: sbrdsp.c:47