blob: 3c7a3a7583a4a3fc1feed0eaba6c35612596d193
1 | /* |
2 | * This file is part of FFmpeg. |
3 | * |
4 | * FFmpeg is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU Lesser General Public |
6 | * License as published by the Free Software Foundation; either |
7 | * version 2.1 of the License, or (at your option) any later version. |
8 | * |
9 | * FFmpeg is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | * Lesser General Public License for more details. |
13 | * |
14 | * You should have received a copy of the GNU Lesser General Public |
15 | * License along with FFmpeg; if not, write to the Free Software |
16 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
17 | */ |
18 | |
19 | #include <stdint.h> |
20 | |
21 | #include "libavutil/attributes.h" |
22 | #include "libavutil/common.h" |
23 | #include "audiodsp.h" |
24 | |
25 | static inline uint32_t clipf_c_one(uint32_t a, uint32_t mini, |
26 | uint32_t maxi, uint32_t maxisign) |
27 | { |
28 | if (a > mini) |
29 | return mini; |
30 | else if ((a ^ (1U << 31)) > maxisign) |
31 | return maxi; |
32 | else |
33 | return a; |
34 | } |
35 | |
36 | static void vector_clipf_c_opposite_sign(float *dst, const float *src, |
37 | float *min, float *max, int len) |
38 | { |
39 | int i; |
40 | uint32_t mini = *(uint32_t *) min; |
41 | uint32_t maxi = *(uint32_t *) max; |
42 | uint32_t maxisign = maxi ^ (1U << 31); |
43 | uint32_t *dsti = (uint32_t *) dst; |
44 | const uint32_t *srci = (const uint32_t *) src; |
45 | |
46 | for (i = 0; i < len; i += 8) { |
47 | dsti[i + 0] = clipf_c_one(srci[i + 0], mini, maxi, maxisign); |
48 | dsti[i + 1] = clipf_c_one(srci[i + 1], mini, maxi, maxisign); |
49 | dsti[i + 2] = clipf_c_one(srci[i + 2], mini, maxi, maxisign); |
50 | dsti[i + 3] = clipf_c_one(srci[i + 3], mini, maxi, maxisign); |
51 | dsti[i + 4] = clipf_c_one(srci[i + 4], mini, maxi, maxisign); |
52 | dsti[i + 5] = clipf_c_one(srci[i + 5], mini, maxi, maxisign); |
53 | dsti[i + 6] = clipf_c_one(srci[i + 6], mini, maxi, maxisign); |
54 | dsti[i + 7] = clipf_c_one(srci[i + 7], mini, maxi, maxisign); |
55 | } |
56 | } |
57 | |
58 | static void vector_clipf_c(float *dst, const float *src, int len, |
59 | float min, float max) |
60 | { |
61 | int i; |
62 | |
63 | if (min < 0 && max > 0) { |
64 | vector_clipf_c_opposite_sign(dst, src, &min, &max, len); |
65 | } else { |
66 | for (i = 0; i < len; i += 8) { |
67 | dst[i] = av_clipf(src[i], min, max); |
68 | dst[i + 1] = av_clipf(src[i + 1], min, max); |
69 | dst[i + 2] = av_clipf(src[i + 2], min, max); |
70 | dst[i + 3] = av_clipf(src[i + 3], min, max); |
71 | dst[i + 4] = av_clipf(src[i + 4], min, max); |
72 | dst[i + 5] = av_clipf(src[i + 5], min, max); |
73 | dst[i + 6] = av_clipf(src[i + 6], min, max); |
74 | dst[i + 7] = av_clipf(src[i + 7], min, max); |
75 | } |
76 | } |
77 | } |
78 | |
79 | static int32_t scalarproduct_int16_c(const int16_t *v1, const int16_t *v2, |
80 | int order) |
81 | { |
82 | int res = 0; |
83 | |
84 | while (order--) |
85 | res += *v1++ **v2++; |
86 | |
87 | return res; |
88 | } |
89 | |
90 | static void vector_clip_int32_c(int32_t *dst, const int32_t *src, int32_t min, |
91 | int32_t max, unsigned int len) |
92 | { |
93 | do { |
94 | *dst++ = av_clip(*src++, min, max); |
95 | *dst++ = av_clip(*src++, min, max); |
96 | *dst++ = av_clip(*src++, min, max); |
97 | *dst++ = av_clip(*src++, min, max); |
98 | *dst++ = av_clip(*src++, min, max); |
99 | *dst++ = av_clip(*src++, min, max); |
100 | *dst++ = av_clip(*src++, min, max); |
101 | *dst++ = av_clip(*src++, min, max); |
102 | len -= 8; |
103 | } while (len > 0); |
104 | } |
105 | |
106 | av_cold void ff_audiodsp_init(AudioDSPContext *c) |
107 | { |
108 | c->scalarproduct_int16 = scalarproduct_int16_c; |
109 | c->vector_clip_int32 = vector_clip_int32_c; |
110 | c->vector_clipf = vector_clipf_c; |
111 | |
112 | if (ARCH_ARM) |
113 | ff_audiodsp_init_arm(c); |
114 | if (ARCH_PPC) |
115 | ff_audiodsp_init_ppc(c); |
116 | if (ARCH_X86) |
117 | ff_audiodsp_init_x86(c); |
118 | } |
119 |