| /* |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <stdint.h> |
| |
| #include "libavutil/attributes.h" |
| #include "libavutil/common.h" |
| #include "audiodsp.h" |
| |
| static inline float clipf_c_one(float a, uint32_t mini, |
| uint32_t maxi, uint32_t maxisign) |
| { |
| uint32_t ai = av_float2int(a); |
| |
| if (ai > mini) |
| return av_int2float(mini); |
| else if ((ai ^ (1U << 31)) > maxisign) |
| return av_int2float(maxi); |
| else |
| return a; |
| } |
| |
| static void vector_clipf_c_opposite_sign(float *dst, const float *src, |
| float min, float max, int len) |
| { |
| int i; |
| uint32_t mini = av_float2int(min); |
| uint32_t maxi = av_float2int(max); |
| uint32_t maxisign = maxi ^ (1U << 31); |
| |
| for (i = 0; i < len; i += 8) { |
| dst[i + 0] = clipf_c_one(src[i + 0], mini, maxi, maxisign); |
| dst[i + 1] = clipf_c_one(src[i + 1], mini, maxi, maxisign); |
| dst[i + 2] = clipf_c_one(src[i + 2], mini, maxi, maxisign); |
| dst[i + 3] = clipf_c_one(src[i + 3], mini, maxi, maxisign); |
| dst[i + 4] = clipf_c_one(src[i + 4], mini, maxi, maxisign); |
| dst[i + 5] = clipf_c_one(src[i + 5], mini, maxi, maxisign); |
| dst[i + 6] = clipf_c_one(src[i + 6], mini, maxi, maxisign); |
| dst[i + 7] = clipf_c_one(src[i + 7], mini, maxi, maxisign); |
| } |
| } |
| |
| static void vector_clipf_c(float *dst, const float *src, int len, |
| float min, float max) |
| { |
| int i; |
| |
| if (min < 0 && max > 0) { |
| vector_clipf_c_opposite_sign(dst, src, min, max, len); |
| } else { |
| for (i = 0; i < len; i += 8) { |
| dst[i] = av_clipf(src[i], min, max); |
| dst[i + 1] = av_clipf(src[i + 1], min, max); |
| dst[i + 2] = av_clipf(src[i + 2], min, max); |
| dst[i + 3] = av_clipf(src[i + 3], min, max); |
| dst[i + 4] = av_clipf(src[i + 4], min, max); |
| dst[i + 5] = av_clipf(src[i + 5], min, max); |
| dst[i + 6] = av_clipf(src[i + 6], min, max); |
| dst[i + 7] = av_clipf(src[i + 7], min, max); |
| } |
| } |
| } |
| |
| static int32_t scalarproduct_int16_c(const int16_t *v1, const int16_t *v2, |
| int order) |
| { |
| unsigned res = 0; |
| |
| while (order--) |
| res += *v1++ **v2++; |
| |
| return res; |
| } |
| |
| static void vector_clip_int32_c(int32_t *dst, const int32_t *src, int32_t min, |
| int32_t max, unsigned int len) |
| { |
| do { |
| *dst++ = av_clip(*src++, min, max); |
| *dst++ = av_clip(*src++, min, max); |
| *dst++ = av_clip(*src++, min, max); |
| *dst++ = av_clip(*src++, min, max); |
| *dst++ = av_clip(*src++, min, max); |
| *dst++ = av_clip(*src++, min, max); |
| *dst++ = av_clip(*src++, min, max); |
| *dst++ = av_clip(*src++, min, max); |
| len -= 8; |
| } while (len > 0); |
| } |
| |
| av_cold void ff_audiodsp_init(AudioDSPContext *c) |
| { |
| c->scalarproduct_int16 = scalarproduct_int16_c; |
| c->vector_clip_int32 = vector_clip_int32_c; |
| c->vector_clipf = vector_clipf_c; |
| |
| #if ARCH_ARM |
| ff_audiodsp_init_arm(c); |
| #elif ARCH_PPC |
| ff_audiodsp_init_ppc(c); |
| #elif ARCH_RISCV |
| ff_audiodsp_init_riscv(c); |
| #elif ARCH_X86 |
| ff_audiodsp_init_x86(c); |
| #endif |
| } |