/* * 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 uint32_t clipf_c_one(uint32_t a, uint32_t mini, uint32_t maxi, uint32_t maxisign) { if (a > mini) return mini; else if ((a ^ (1U << 31)) > maxisign) return 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 = *(uint32_t *) min; uint32_t maxi = *(uint32_t *) max; uint32_t maxisign = maxi ^ (1U << 31); uint32_t *dsti = (uint32_t *) dst; const uint32_t *srci = (const uint32_t *) src; for (i = 0; i < len; i += 8) { dsti[i + 0] = clipf_c_one(srci[i + 0], mini, maxi, maxisign); dsti[i + 1] = clipf_c_one(srci[i + 1], mini, maxi, maxisign); dsti[i + 2] = clipf_c_one(srci[i + 2], mini, maxi, maxisign); dsti[i + 3] = clipf_c_one(srci[i + 3], mini, maxi, maxisign); dsti[i + 4] = clipf_c_one(srci[i + 4], mini, maxi, maxisign); dsti[i + 5] = clipf_c_one(srci[i + 5], mini, maxi, maxisign); dsti[i + 6] = clipf_c_one(srci[i + 6], mini, maxi, maxisign); dsti[i + 7] = clipf_c_one(srci[i + 7], mini, maxi, maxisign); } } static void vector_clipf_c(float *dst, const float *src, float min, float max, int len) { 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) { int 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); if (ARCH_PPC) ff_audiodsp_init_ppc(c); if (ARCH_X86) ff_audiodsp_init_x86(c); }