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2ba45a60 DM |
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, | |
59 | float min, float max, int len) | |
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 | } |