/*

  * Copyright 2005 Balatoni Denes
  * Copyright 2006 Loren Merritt

  *

  * 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 "config.h"

 #include "attributes.h"

 #include "float_dsp.h"
 
 static void vector_fmul_c(float *dst, const float *src0, const float *src1,
                           int len)
 {
     int i;
     for (i = 0; i < len; i++)
         dst[i] = src0[i] * src1[i];
 }
 

 static void vector_fmac_scalar_c(float *dst, const float *src, float mul,
                                  int len)
 {
     int i;
     for (i = 0; i < len; i++)
         dst[i] += src[i] * mul;
 }
 

 static void vector_fmul_scalar_c(float *dst, const float *src, float mul,
                                  int len)
 {
     int i;
     for (i = 0; i < len; i++)
         dst[i] = src[i] * mul;
 }
 

 static void vector_dmul_scalar_c(double *dst, const double *src, double mul,
                                  int len)
 {
     int i;
     for (i = 0; i < len; i++)
         dst[i] = src[i] * mul;
 }
 

 static void vector_fmul_window_c(float *dst, const float *src0,
                                  const float *src1, const float *win, int len)
 {
     int i, j;
 
     dst  += len;
     win  += len;
     src0 += len;
 
     for (i = -len, j = len - 1; i < 0; i++, j--) {
         float s0 = src0[i];
         float s1 = src1[j];
         float wi = win[i];
         float wj = win[j];
         dst[i] = s0 * wj - s1 * wi;
         dst[j] = s0 * wi + s1 * wj;
     }
 }
 

 static void vector_fmul_add_c(float *dst, const float *src0, const float *src1,
                               const float *src2, int len){
     int i;
 
     for (i = 0; i < len; i++)
         dst[i] = src0[i] * src1[i] + src2[i];
 }
 

 static void vector_fmul_reverse_c(float *dst, const float *src0,
                                   const float *src1, int len)
 {
     int i;
 
     src1 += len-1;
     for (i = 0; i < len; i++)
         dst[i] = src0[i] * src1[-i];
 }
 

 static void butterflies_float_c(float *av_restrict v1, float *av_restrict v2,

                                 int len)
 {
     int i;
 
     for (i = 0; i < len; i++) {
         float t = v1[i] - v2[i];
         v1[i] += v2[i];
         v2[i] = t;
     }
 }
 

 float avpriv_scalarproduct_float_c(const float *v1, const float *v2, int len)
 {
     float p = 0.0;
     int i;
 
     for (i = 0; i < len; i++)
         p += v1[i] * v2[i];
 
     return p;
 }
 

 av_cold void avpriv_float_dsp_init(AVFloatDSPContext *fdsp, int bit_exact)

 {
     fdsp->vector_fmul = vector_fmul_c;

     fdsp->vector_fmac_scalar = vector_fmac_scalar_c;

     fdsp->vector_fmul_scalar = vector_fmul_scalar_c;

     fdsp->vector_dmul_scalar = vector_dmul_scalar_c;

     fdsp->vector_fmul_window = vector_fmul_window_c;

     fdsp->vector_fmul_add = vector_fmul_add_c;

     fdsp->vector_fmul_reverse = vector_fmul_reverse_c;

     fdsp->butterflies_float = butterflies_float_c;

     fdsp->scalarproduct_float = avpriv_scalarproduct_float_c;

     if (ARCH_AARCH64)
         ff_float_dsp_init_aarch64(fdsp);
     if (ARCH_ARM)
         ff_float_dsp_init_arm(fdsp);
     if (ARCH_PPC)
         ff_float_dsp_init_ppc(fdsp, bit_exact);
     if (ARCH_X86)
         ff_float_dsp_init_x86(fdsp);

     if (ARCH_MIPS)
         ff_float_dsp_init_mips(fdsp);

 }

 
 #ifdef TEST
 
 #include <float.h>
 #include <math.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
 

 #include "common.h"

 #include "cpu.h"

 #include "internal.h"

 #include "lfg.h"
 #include "log.h"
 #include "mem.h"
 #include "random_seed.h"
 
 #define LEN 240
 
 static void fill_float_array(AVLFG *lfg, float *a, int len)
 {
     int i;
     double bmg[2], stddev = 10.0, mean = 0.0;
 
     for (i = 0; i < len; i += 2) {
         av_bmg_get(lfg, bmg);
         a[i]     = bmg[0] * stddev + mean;
         a[i + 1] = bmg[1] * stddev + mean;
     }
 }
 static int compare_floats(const float *a, const float *b, int len,
                           float max_diff)
 {
     int i;
     for (i = 0; i < len; i++) {
         if (fabsf(a[i] - b[i]) > max_diff) {
             av_log(NULL, AV_LOG_ERROR, "%d: %- .12f - %- .12f = % .12g\n",
                    i, a[i], b[i], a[i] - b[i]);
             return -1;
         }
     }
     return 0;
 }
 
 static void fill_double_array(AVLFG *lfg, double *a, int len)
 {
     int i;
     double bmg[2], stddev = 10.0, mean = 0.0;
 
     for (i = 0; i < len; i += 2) {
         av_bmg_get(lfg, bmg);
         a[i]     = bmg[0] * stddev + mean;
         a[i + 1] = bmg[1] * stddev + mean;
     }
 }
 
 static int compare_doubles(const double *a, const double *b, int len,
                            double max_diff)
 {
     int i;
 
     for (i = 0; i < len; i++) {
         if (fabs(a[i] - b[i]) > max_diff) {
             av_log(NULL, AV_LOG_ERROR, "%d: %- .12f - %- .12f = % .12g\n",
                    i, a[i], b[i], a[i] - b[i]);
             return -1;
         }
     }
     return 0;
 }
 
 static int test_vector_fmul(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
                             const float *v1, const float *v2)
 {

     LOCAL_ALIGNED(32, float, cdst, [LEN]);
     LOCAL_ALIGNED(32, float, odst, [LEN]);

     int ret;
 
     cdsp->vector_fmul(cdst, v1, v2, LEN);
     fdsp->vector_fmul(odst, v1, v2, LEN);
 
     if (ret = compare_floats(cdst, odst, LEN, FLT_EPSILON))

         av_log(NULL, AV_LOG_ERROR, "vector_fmul failed\n");

 
     return ret;
 }
 
 #define ARBITRARY_FMAC_SCALAR_CONST 0.005
 static int test_vector_fmac_scalar(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
                                    const float *v1, const float *src0, float scale)
 {

     LOCAL_ALIGNED(32, float, cdst, [LEN]);
     LOCAL_ALIGNED(32, float, odst, [LEN]);

     int ret;
 
     memcpy(cdst, v1, LEN * sizeof(*v1));
     memcpy(odst, v1, LEN * sizeof(*v1));
 
     cdsp->vector_fmac_scalar(cdst, src0, scale, LEN);
     fdsp->vector_fmac_scalar(odst, src0, scale, LEN);
 
     if (ret = compare_floats(cdst, odst, LEN, ARBITRARY_FMAC_SCALAR_CONST))

         av_log(NULL, AV_LOG_ERROR, "vector_fmac_scalar failed\n");

 
     return ret;
 }
 
 static int test_vector_fmul_scalar(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
                                    const float *v1, float scale)
 {

     LOCAL_ALIGNED(32, float, cdst, [LEN]);
     LOCAL_ALIGNED(32, float, odst, [LEN]);

     int ret;
 
     cdsp->vector_fmul_scalar(cdst, v1, scale, LEN);
     fdsp->vector_fmul_scalar(odst, v1, scale, LEN);
 
     if (ret = compare_floats(cdst, odst, LEN, FLT_EPSILON))

         av_log(NULL, AV_LOG_ERROR, "vector_fmul_scalar failed\n");

 
     return ret;
 }
 
 static int test_vector_dmul_scalar(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
                                    const double *v1, double scale)
 {

     LOCAL_ALIGNED(32, double, cdst, [LEN]);
     LOCAL_ALIGNED(32, double, odst, [LEN]);

     int ret;
 
     cdsp->vector_dmul_scalar(cdst, v1, scale, LEN);
     fdsp->vector_dmul_scalar(odst, v1, scale, LEN);
 
     if (ret = compare_doubles(cdst, odst, LEN, DBL_EPSILON))

         av_log(NULL, AV_LOG_ERROR, "vector_dmul_scalar failed\n");

 
     return ret;
 }
 
 #define ARBITRARY_FMUL_WINDOW_CONST 0.008
 static int test_vector_fmul_window(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
                                    const float *v1, const float *v2, const float *v3)
 {

     LOCAL_ALIGNED(32, float, cdst, [LEN]);
     LOCAL_ALIGNED(32, float, odst, [LEN]);

     int ret;
 
     cdsp->vector_fmul_window(cdst, v1, v2, v3, LEN / 2);
     fdsp->vector_fmul_window(odst, v1, v2, v3, LEN / 2);
 
     if (ret = compare_floats(cdst, odst, LEN, ARBITRARY_FMUL_WINDOW_CONST))

         av_log(NULL, AV_LOG_ERROR, "vector_fmul_window failed\n");

 
     return ret;
 }
 
 #define ARBITRARY_FMUL_ADD_CONST 0.005
 static int test_vector_fmul_add(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
                                 const float *v1, const float *v2, const float *v3)
 {

     LOCAL_ALIGNED(32, float, cdst, [LEN]);
     LOCAL_ALIGNED(32, float, odst, [LEN]);

     int ret;
 
     cdsp->vector_fmul_add(cdst, v1, v2, v3, LEN);
     fdsp->vector_fmul_add(odst, v1, v2, v3, LEN);
 
     if (ret = compare_floats(cdst, odst, LEN, ARBITRARY_FMUL_ADD_CONST))

         av_log(NULL, AV_LOG_ERROR, "vector_fmul_add failed\n");

 
     return ret;
 }
 
 static int test_vector_fmul_reverse(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
                                     const float *v1, const float *v2)
 {

     LOCAL_ALIGNED(32, float, cdst, [LEN]);
     LOCAL_ALIGNED(32, float, odst, [LEN]);

     int ret;
 
     cdsp->vector_fmul_reverse(cdst, v1, v2, LEN);
     fdsp->vector_fmul_reverse(odst, v1, v2, LEN);
 
     if (ret = compare_floats(cdst, odst, LEN, FLT_EPSILON))

         av_log(NULL, AV_LOG_ERROR, "vector_fmul_reverse failed\n");

 
     return ret;
 }
 
 static int test_butterflies_float(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
                                   const float *v1, const float *v2)
 {

     LOCAL_ALIGNED(32, float, cv1, [LEN]);
     LOCAL_ALIGNED(32, float, cv2, [LEN]);
     LOCAL_ALIGNED(32, float, ov1, [LEN]);
     LOCAL_ALIGNED(32, float, ov2, [LEN]);

     int ret;
 
     memcpy(cv1, v1, LEN * sizeof(*v1));
     memcpy(cv2, v2, LEN * sizeof(*v2));
     memcpy(ov1, v1, LEN * sizeof(*v1));
     memcpy(ov2, v2, LEN * sizeof(*v2));
 
     cdsp->butterflies_float(cv1, cv2, LEN);
     fdsp->butterflies_float(ov1, ov2, LEN);
 
     if ((ret = compare_floats(cv1, ov1, LEN, FLT_EPSILON)) ||
         (ret = compare_floats(cv2, ov2, LEN, FLT_EPSILON)))

         av_log(NULL, AV_LOG_ERROR, "butterflies_float failed\n");

 
     return ret;
 }
 
 #define ARBITRARY_SCALARPRODUCT_CONST 0.2
 static int test_scalarproduct_float(AVFloatDSPContext *fdsp, AVFloatDSPContext *cdsp,
                                     const float *v1, const float *v2)
 {
     float cprod, oprod;
     int ret;
 
     cprod = cdsp->scalarproduct_float(v1, v2, LEN);
     oprod = fdsp->scalarproduct_float(v1, v2, LEN);
 
     if (ret = compare_floats(&cprod, &oprod, 1, ARBITRARY_SCALARPRODUCT_CONST))

         av_log(NULL, AV_LOG_ERROR, "scalarproduct_float failed\n");

 
     return ret;
 }
 
 int main(int argc, char **argv)
 {
     int ret = 0;
     uint32_t seed;
     AVFloatDSPContext fdsp, cdsp;
     AVLFG lfg;
 

     LOCAL_ALIGNED(32, float, src0, [LEN]);
     LOCAL_ALIGNED(32, float, src1, [LEN]);
     LOCAL_ALIGNED(32, float, src2, [LEN]);
     LOCAL_ALIGNED(32, double, dbl_src0, [LEN]);
     LOCAL_ALIGNED(32, double, dbl_src1, [LEN]);

 
     if (argc > 2 && !strcmp(argv[1], "-s"))
         seed = strtoul(argv[2], NULL, 10);
     else
         seed = av_get_random_seed();
 
     av_log(NULL, AV_LOG_INFO, "float_dsp-test: random seed %u\n", seed);
 
     av_lfg_init(&lfg, seed);
 
     fill_float_array(&lfg, src0, LEN);
     fill_float_array(&lfg, src1, LEN);
     fill_float_array(&lfg, src2, LEN);
 
     fill_double_array(&lfg, dbl_src0, LEN);
     fill_double_array(&lfg, dbl_src1, LEN);
 
     avpriv_float_dsp_init(&fdsp, 1);
     av_set_cpu_flags_mask(0);
     avpriv_float_dsp_init(&cdsp, 1);
 
     if (test_vector_fmul(&fdsp, &cdsp, src0, src1))
         ret -= 1 << 0;
     if (test_vector_fmac_scalar(&fdsp, &cdsp, src2, src0, src1[0]))
         ret -= 1 << 1;
     if (test_vector_fmul_scalar(&fdsp, &cdsp, src0, src1[0]))
         ret -= 1 << 2;
     if (test_vector_fmul_window(&fdsp, &cdsp, src0, src1, src2))
         ret -= 1 << 3;
     if (test_vector_fmul_add(&fdsp, &cdsp, src0, src1, src2))
         ret -= 1 << 4;
     if (test_vector_fmul_reverse(&fdsp, &cdsp, src0, src1))
         ret -= 1 << 5;
     if (test_butterflies_float(&fdsp, &cdsp, src0, src1))
         ret -= 1 << 6;
     if (test_scalarproduct_float(&fdsp, &cdsp, src0, src1))
         ret -= 1 << 7;
     if (test_vector_dmul_scalar(&fdsp, &cdsp, dbl_src0, dbl_src1[0]))
         ret -= 1 << 8;
 
     return ret;
 }
 
 #endif /* TEST */