FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/synth_filter.c
Date: 2026-04-19 05:16:53
Exec Total Coverage
Lines: 103 103 100.0%
Functions: 5 5 100.0%
Branches: 24 24 100.0%
Line Branch Exec Source
1 /*
2 * copyright (c) 2008 Michael Niedermayer <michaelni@gmx.at>
3 * Copyright (C) 2016 foo86
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "dcadct.h"
23 #include "dcamath.h"
24 #include "synth_filter.h"
25
26 50620 static void synth_filter_float(AVTXContext *imdct,
27 float *synth_buf_ptr, int *synth_buf_offset,
28 float synth_buf2[32], const float window[512],
29 float out[32], float in[32], float scale,
30 av_tx_fn imdct_fn)
31 {
32 50620 float *synth_buf = synth_buf_ptr + *synth_buf_offset;
33 int i, j;
34
35 50620 imdct_fn(imdct, synth_buf, in, sizeof(float));
36
37
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 860540 for (i = 0; i < 16; i++) {
38 809920 float a = synth_buf2[i ];
39 809920 float b = synth_buf2[i + 16];
40 809920 float c = 0;
41 809920 float d = 0;
42
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 4454272 for (j = 0; j < 512 - *synth_buf_offset; j += 64) {
43 3644352 a += window[i + j ] * (-synth_buf[15 - i + j ]);
44 3644352 b += window[i + j + 16] * ( synth_buf[ i + j ]);
45 3644352 c += window[i + j + 32] * ( synth_buf[16 + i + j ]);
46 3644352 d += window[i + j + 48] * ( synth_buf[31 - i + j ]);
47 }
48
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 3644928 for ( ; j < 512; j += 64) {
49 2835008 a += window[i + j ] * (-synth_buf[15 - i + j - 512]);
50 2835008 b += window[i + j + 16] * ( synth_buf[ i + j - 512]);
51 2835008 c += window[i + j + 32] * ( synth_buf[16 + i + j - 512]);
52 2835008 d += window[i + j + 48] * ( synth_buf[31 - i + j - 512]);
53 }
54 809920 out[i ] = a * scale;
55 809920 out[i + 16] = b * scale;
56 809920 synth_buf2[i ] = c;
57 809920 synth_buf2[i + 16] = d;
58 }
59
60 50620 *synth_buf_offset = (*synth_buf_offset - 32) & 511;
61 50620 }
62
63 3136 static void synth_filter_float_64(AVTXContext *imdct,
64 float *synth_buf_ptr, int *synth_buf_offset,
65 float synth_buf2[64], const float window[1024],
66 float out[64], float in[64], float scale,
67 av_tx_fn imdct_fn)
68 {
69 3136 float *synth_buf = synth_buf_ptr + *synth_buf_offset;
70 int i, j;
71
72 3136 imdct_fn(imdct, synth_buf, in, sizeof(float));
73
74
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 103488 for (i = 0; i < 32; i++) {
75 100352 float a = synth_buf2[i ];
76 100352 float b = synth_buf2[i + 32];
77 100352 float c = 0;
78 100352 float d = 0;
79
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 551936 for (j = 0; j < 1024 - *synth_buf_offset; j += 128) {
80 451584 a += window[i + j ] * (-synth_buf[31 - i + j ]);
81 451584 b += window[i + j + 32] * ( synth_buf[ i + j ]);
82 451584 c += window[i + j + 64] * ( synth_buf[32 + i + j ]);
83 451584 d += window[i + j + 96] * ( synth_buf[63 - i + j ]);
84 }
85
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 451584 for ( ; j < 1024; j += 128) {
86 351232 a += window[i + j ] * (-synth_buf[31 - i + j - 1024]);
87 351232 b += window[i + j + 32] * ( synth_buf[ i + j - 1024]);
88 351232 c += window[i + j + 64] * ( synth_buf[32 + i + j - 1024]);
89 351232 d += window[i + j + 96] * ( synth_buf[63 - i + j - 1024]);
90 }
91 100352 out[i ] = a * scale;
92 100352 out[i + 32] = b * scale;
93 100352 synth_buf2[i ] = c;
94 100352 synth_buf2[i + 32] = d;
95 }
96
97 3136 *synth_buf_offset = (*synth_buf_offset - 64) & 1023;
98 3136 }
99
100 120720 static void synth_filter_fixed(DCADCTContext *imdct,
101 int32_t *synth_buf_ptr, int *synth_buf_offset,
102 int32_t synth_buf2[32], const int32_t window[512],
103 int32_t out[32], const int32_t in[32])
104 {
105 120720 int32_t *synth_buf = synth_buf_ptr + *synth_buf_offset;
106 int i, j;
107
108 120720 imdct->imdct_half[0](synth_buf, in);
109
110
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 2052240 for (i = 0; i < 16; i++) {
111 1931520 int64_t a = synth_buf2[i ] * (INT64_C(1) << 21);
112 1931520 int64_t b = synth_buf2[i + 16] * (INT64_C(1) << 21);
113 1931520 int64_t c = 0;
114 1931520 int64_t d = 0;
115
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 10623360 for (j = 0; j < 512 - *synth_buf_offset; j += 64) {
116 8691840 a += (int64_t)window[i + j ] * synth_buf[ i + j ];
117 8691840 b += (int64_t)window[i + j + 16] * synth_buf[15 - i + j ];
118 8691840 c += (int64_t)window[i + j + 32] * synth_buf[16 + i + j ];
119 8691840 d += (int64_t)window[i + j + 48] * synth_buf[31 - i + j ];
120 }
121
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 8691840 for ( ; j < 512; j += 64) {
122 6760320 a += (int64_t)window[i + j ] * synth_buf[ i + j - 512];
123 6760320 b += (int64_t)window[i + j + 16] * synth_buf[15 - i + j - 512];
124 6760320 c += (int64_t)window[i + j + 32] * synth_buf[16 + i + j - 512];
125 6760320 d += (int64_t)window[i + j + 48] * synth_buf[31 - i + j - 512];
126 }
127 1931520 out[i ] = clip23(norm21(a));
128 1931520 out[i + 16] = clip23(norm21(b));
129 1931520 synth_buf2[i ] = norm21(c);
130 1931520 synth_buf2[i + 16] = norm21(d);
131 }
132
133 120720 *synth_buf_offset = (*synth_buf_offset - 32) & 511;
134 120720 }
135
136 9600 static void synth_filter_fixed_64(DCADCTContext *imdct,
137 int32_t *synth_buf_ptr, int *synth_buf_offset,
138 int32_t synth_buf2[64], const int32_t window[1024],
139 int32_t out[64], const int32_t in[64])
140 {
141 9600 int32_t *synth_buf = synth_buf_ptr + *synth_buf_offset;
142 int i, j;
143
144 9600 imdct->imdct_half[1](synth_buf, in);
145
146
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 316800 for (i = 0; i < 32; i++) {
147 307200 int64_t a = synth_buf2[i ] * (INT64_C(1) << 20);
148 307200 int64_t b = synth_buf2[i + 32] * (INT64_C(1) << 20);
149 307200 int64_t c = 0;
150 307200 int64_t d = 0;
151
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 1689600 for (j = 0; j < 1024 - *synth_buf_offset; j += 128) {
152 1382400 a += (int64_t)window[i + j ] * synth_buf[ i + j ];
153 1382400 b += (int64_t)window[i + j + 32] * synth_buf[31 - i + j ];
154 1382400 c += (int64_t)window[i + j + 64] * synth_buf[32 + i + j ];
155 1382400 d += (int64_t)window[i + j + 96] * synth_buf[63 - i + j ];
156 }
157
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 1382400 for ( ; j < 1024; j += 128) {
158 1075200 a += (int64_t)window[i + j ] * synth_buf[ i + j - 1024];
159 1075200 b += (int64_t)window[i + j + 32] * synth_buf[31 - i + j - 1024];
160 1075200 c += (int64_t)window[i + j + 64] * synth_buf[32 + i + j - 1024];
161 1075200 d += (int64_t)window[i + j + 96] * synth_buf[63 - i + j - 1024];
162 }
163 307200 out[i ] = clip23(norm20(a));
164 307200 out[i + 32] = clip23(norm20(b));
165 307200 synth_buf2[i ] = norm20(c);
166 307200 synth_buf2[i + 32] = norm20(d);
167 }
168
169 9600 *synth_buf_offset = (*synth_buf_offset - 64) & 1023;
170 9600 }
171
172 169 av_cold void ff_synth_filter_init(SynthFilterContext *c)
173 {
174 169 c->synth_filter_float = synth_filter_float;
175 169 c->synth_filter_float_64 = synth_filter_float_64;
176 169 c->synth_filter_fixed = synth_filter_fixed;
177 169 c->synth_filter_fixed_64 = synth_filter_fixed_64;
178
179 #if ARCH_AARCH64
180 ff_synth_filter_init_aarch64(c);
181 #elif ARCH_ARM
182 ff_synth_filter_init_arm(c);
183 #elif ARCH_X86 && HAVE_X86ASM
184 169 ff_synth_filter_init_x86(c);
185 #endif
186 169 }
187