FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/synth_filter.c
Date: 2021-09-16 08:47:15
Exec Total Coverage
Lines: 103 103 100.0%
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 "fft.h"
23 #include "dcadct.h"
24 #include "dcamath.h"
25 #include "synth_filter.h"
26
27 50220 static void synth_filter_float(FFTContext *imdct,
28 float *synth_buf_ptr, int *synth_buf_offset,
29 float synth_buf2[32], const float window[512],
30 float out[32], const float in[32], float scale)
31 {
32 50220 float *synth_buf = synth_buf_ptr + *synth_buf_offset;
33 int i, j;
34
35 50220 imdct->imdct_half(imdct, synth_buf, in);
36
37
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853740 for (i = 0; i < 16; i++) {
38 803520 float a = synth_buf2[i ];
39 803520 float b = synth_buf2[i + 16];
40 803520 float c = 0;
41 803520 float d = 0;
42
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4419072 for (j = 0; j < 512 - *synth_buf_offset; j += 64) {
43 3615552 a += window[i + j ] * (-synth_buf[15 - i + j ]);
44 3615552 b += window[i + j + 16] * ( synth_buf[ i + j ]);
45 3615552 c += window[i + j + 32] * ( synth_buf[16 + i + j ]);
46 3615552 d += window[i + j + 48] * ( synth_buf[31 - i + j ]);
47 }
48
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3616128 for ( ; j < 512; j += 64) {
49 2812608 a += window[i + j ] * (-synth_buf[15 - i + j - 512]);
50 2812608 b += window[i + j + 16] * ( synth_buf[ i + j - 512]);
51 2812608 c += window[i + j + 32] * ( synth_buf[16 + i + j - 512]);
52 2812608 d += window[i + j + 48] * ( synth_buf[31 - i + j - 512]);
53 }
54 803520 out[i ] = a * scale;
55 803520 out[i + 16] = b * scale;
56 803520 synth_buf2[i ] = c;
57 803520 synth_buf2[i + 16] = d;
58 }
59
60 50220 *synth_buf_offset = (*synth_buf_offset - 32) & 511;
61 50220 }
62
63 3136 static void synth_filter_float_64(FFTContext *imdct,
64 float *synth_buf_ptr, int *synth_buf_offset,
65 float synth_buf2[64], const float window[1024],
66 float out[64], const float in[64], float scale)
67 {
68 3136 float *synth_buf = synth_buf_ptr + *synth_buf_offset;
69 int i, j;
70
71 3136 imdct->imdct_half(imdct, synth_buf, in);
72
73
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103488 for (i = 0; i < 32; i++) {
74 100352 float a = synth_buf2[i ];
75 100352 float b = synth_buf2[i + 32];
76 100352 float c = 0;
77 100352 float d = 0;
78
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551936 for (j = 0; j < 1024 - *synth_buf_offset; j += 128) {
79 451584 a += window[i + j ] * (-synth_buf[31 - i + j ]);
80 451584 b += window[i + j + 32] * ( synth_buf[ i + j ]);
81 451584 c += window[i + j + 64] * ( synth_buf[32 + i + j ]);
82 451584 d += window[i + j + 96] * ( synth_buf[63 - i + j ]);
83 }
84
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451584 for ( ; j < 1024; j += 128) {
85 351232 a += window[i + j ] * (-synth_buf[31 - i + j - 1024]);
86 351232 b += window[i + j + 32] * ( synth_buf[ i + j - 1024]);
87 351232 c += window[i + j + 64] * ( synth_buf[32 + i + j - 1024]);
88 351232 d += window[i + j + 96] * ( synth_buf[63 - i + j - 1024]);
89 }
90 100352 out[i ] = a * scale;
91 100352 out[i + 32] = b * scale;
92 100352 synth_buf2[i ] = c;
93 100352 synth_buf2[i + 32] = d;
94 }
95
96 3136 *synth_buf_offset = (*synth_buf_offset - 64) & 1023;
97 3136 }
98
99 117376 static void synth_filter_fixed(DCADCTContext *imdct,
100 int32_t *synth_buf_ptr, int *synth_buf_offset,
101 int32_t synth_buf2[32], const int32_t window[512],
102 int32_t out[32], const int32_t in[32])
103 {
104 117376 int32_t *synth_buf = synth_buf_ptr + *synth_buf_offset;
105 int i, j;
106
107 117376 imdct->imdct_half[0](synth_buf, in);
108
109
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1995392 for (i = 0; i < 16; i++) {
110 1878016 int64_t a = synth_buf2[i ] * (INT64_C(1) << 21);
111 1878016 int64_t b = synth_buf2[i + 16] * (INT64_C(1) << 21);
112 1878016 int64_t c = 0;
113 1878016 int64_t d = 0;
114
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10329088 for (j = 0; j < 512 - *synth_buf_offset; j += 64) {
115 8451072 a += (int64_t)window[i + j ] * synth_buf[ i + j ];
116 8451072 b += (int64_t)window[i + j + 16] * synth_buf[15 - i + j ];
117 8451072 c += (int64_t)window[i + j + 32] * synth_buf[16 + i + j ];
118 8451072 d += (int64_t)window[i + j + 48] * synth_buf[31 - i + j ];
119 }
120
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8451072 for ( ; j < 512; j += 64) {
121 6573056 a += (int64_t)window[i + j ] * synth_buf[ i + j - 512];
122 6573056 b += (int64_t)window[i + j + 16] * synth_buf[15 - i + j - 512];
123 6573056 c += (int64_t)window[i + j + 32] * synth_buf[16 + i + j - 512];
124 6573056 d += (int64_t)window[i + j + 48] * synth_buf[31 - i + j - 512];
125 }
126 1878016 out[i ] = clip23(norm21(a));
127 1878016 out[i + 16] = clip23(norm21(b));
128 1878016 synth_buf2[i ] = norm21(c);
129 1878016 synth_buf2[i + 16] = norm21(d);
130 }
131
132 117376 *synth_buf_offset = (*synth_buf_offset - 32) & 511;
133 117376 }
134
135 6720 static void synth_filter_fixed_64(DCADCTContext *imdct,
136 int32_t *synth_buf_ptr, int *synth_buf_offset,
137 int32_t synth_buf2[64], const int32_t window[1024],
138 int32_t out[64], const int32_t in[64])
139 {
140 6720 int32_t *synth_buf = synth_buf_ptr + *synth_buf_offset;
141 int i, j;
142
143 6720 imdct->imdct_half[1](synth_buf, in);
144
145
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221760 for (i = 0; i < 32; i++) {
146 215040 int64_t a = synth_buf2[i ] * (INT64_C(1) << 20);
147 215040 int64_t b = synth_buf2[i + 32] * (INT64_C(1) << 20);
148 215040 int64_t c = 0;
149 215040 int64_t d = 0;
150
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1182720 for (j = 0; j < 1024 - *synth_buf_offset; j += 128) {
151 967680 a += (int64_t)window[i + j ] * synth_buf[ i + j ];
152 967680 b += (int64_t)window[i + j + 32] * synth_buf[31 - i + j ];
153 967680 c += (int64_t)window[i + j + 64] * synth_buf[32 + i + j ];
154 967680 d += (int64_t)window[i + j + 96] * synth_buf[63 - i + j ];
155 }
156
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967680 for ( ; j < 1024; j += 128) {
157 752640 a += (int64_t)window[i + j ] * synth_buf[ i + j - 1024];
158 752640 b += (int64_t)window[i + j + 32] * synth_buf[31 - i + j - 1024];
159 752640 c += (int64_t)window[i + j + 64] * synth_buf[32 + i + j - 1024];
160 752640 d += (int64_t)window[i + j + 96] * synth_buf[63 - i + j - 1024];
161 }
162 215040 out[i ] = clip23(norm20(a));
163 215040 out[i + 32] = clip23(norm20(b));
164 215040 synth_buf2[i ] = norm20(c);
165 215040 synth_buf2[i + 32] = norm20(d);
166 }
167
168 6720 *synth_buf_offset = (*synth_buf_offset - 64) & 1023;
169 6720 }
170
171 105 av_cold void ff_synth_filter_init(SynthFilterContext *c)
172 {
173 105 c->synth_filter_float = synth_filter_float;
174 105 c->synth_filter_float_64 = synth_filter_float_64;
175 105 c->synth_filter_fixed = synth_filter_fixed;
176 105 c->synth_filter_fixed_64 = synth_filter_fixed_64;
177
178 if (ARCH_AARCH64)
179 ff_synth_filter_init_aarch64(c);
180 if (ARCH_ARM)
181 ff_synth_filter_init_arm(c);
182 if (ARCH_X86)
183 105 ff_synth_filter_init_x86(c);
184 105 }
185