/*

  * 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, 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)
 {
     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);
 }