| 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 | } |