/*

  * 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 <assert.h>
 #include <stdint.h>

 #include <string.h>

 
 #include "config.h"

 #include "libavutil/avassert.h"

 #include "libavutil/attributes.h"

 #include "libavutil/imgutils.h"

 #include "avcodec.h"

 #include "dsputil.h"
 #include "imgconvert.h"

 #include "mpegvideoencdsp.h"
 
 static int try_8x8basis_c(int16_t rem[64], int16_t weight[64],
                           int16_t basis[64], int scale)
 {
     int i;
     unsigned int sum = 0;
 
     for (i = 0; i < 8 * 8; i++) {
         int b = rem[i] + ((basis[i] * scale +
                            (1 << (BASIS_SHIFT - RECON_SHIFT - 1))) >>
                           (BASIS_SHIFT - RECON_SHIFT));
         int w = weight[i];
         b >>= RECON_SHIFT;

         av_assert2(-512 < b && b < 512);

 
         sum += (w * b) * (w * b) >> 4;
     }
     return sum >> 2;
 }
 
 static void add_8x8basis_c(int16_t rem[64], int16_t basis[64], int scale)
 {
     int i;
 
     for (i = 0; i < 8 * 8; i++)
         rem[i] += (basis[i] * scale +
                    (1 << (BASIS_SHIFT - RECON_SHIFT - 1))) >>
                   (BASIS_SHIFT - RECON_SHIFT);
 }
 

 static int pix_sum_c(uint8_t *pix, int line_size)
 {
     int s = 0, i, j;
 
     for (i = 0; i < 16; i++) {
         for (j = 0; j < 16; j += 8) {
             s   += pix[0];
             s   += pix[1];
             s   += pix[2];
             s   += pix[3];
             s   += pix[4];
             s   += pix[5];
             s   += pix[6];
             s   += pix[7];
             pix += 8;
         }
         pix += line_size - 16;
     }
     return s;
 }
 
 static int pix_norm1_c(uint8_t *pix, int line_size)
 {
     int s = 0, i, j;
     uint32_t *sq = ff_square_tab + 256;
 
     for (i = 0; i < 16; i++) {
         for (j = 0; j < 16; j += 8) {
 #if 0
             s += sq[pix[0]];
             s += sq[pix[1]];
             s += sq[pix[2]];
             s += sq[pix[3]];
             s += sq[pix[4]];
             s += sq[pix[5]];
             s += sq[pix[6]];
             s += sq[pix[7]];
 #else
 #if HAVE_FAST_64BIT
             register uint64_t x = *(uint64_t *) pix;
             s += sq[x         & 0xff];
             s += sq[(x >>  8) & 0xff];
             s += sq[(x >> 16) & 0xff];
             s += sq[(x >> 24) & 0xff];
             s += sq[(x >> 32) & 0xff];
             s += sq[(x >> 40) & 0xff];
             s += sq[(x >> 48) & 0xff];
             s += sq[(x >> 56) & 0xff];
 #else
             register uint32_t x = *(uint32_t *) pix;
             s += sq[x         & 0xff];
             s += sq[(x >>  8) & 0xff];
             s += sq[(x >> 16) & 0xff];
             s += sq[(x >> 24) & 0xff];
             x  = *(uint32_t *) (pix + 4);
             s += sq[x         & 0xff];
             s += sq[(x >>  8) & 0xff];
             s += sq[(x >> 16) & 0xff];
             s += sq[(x >> 24) & 0xff];
 #endif
 #endif
             pix += 8;
         }
         pix += line_size - 16;
     }
     return s;
 }
 

 /* draw the edges of width 'w' of an image of size width, height */
 // FIXME: Check that this is OK for MPEG-4 interlaced.
 static void draw_edges_8_c(uint8_t *buf, int wrap, int width, int height,
                            int w, int h, int sides)
 {
     uint8_t *ptr = buf, *last_line;
     int i;
 
     /* left and right */
     for (i = 0; i < height; i++) {
         memset(ptr - w, ptr[0], w);
         memset(ptr + width, ptr[width - 1], w);
         ptr += wrap;
     }
 
     /* top and bottom + corners */
     buf -= w;
     last_line = buf + (height - 1) * wrap;
     if (sides & EDGE_TOP)
         for (i = 0; i < h; i++)
             // top
             memcpy(buf - (i + 1) * wrap, buf, width + w + w);
     if (sides & EDGE_BOTTOM)
         for (i = 0; i < h; i++)
             // bottom
             memcpy(last_line + (i + 1) * wrap, last_line, width + w + w);
 }
 

 av_cold void ff_mpegvideoencdsp_init(MpegvideoEncDSPContext *c,
                                      AVCodecContext *avctx)
 {
     c->try_8x8basis = try_8x8basis_c;
     c->add_8x8basis = add_8x8basis_c;
 

     c->shrink[0] = av_image_copy_plane;
     c->shrink[1] = ff_shrink22;
     c->shrink[2] = ff_shrink44;
     c->shrink[3] = ff_shrink88;
 
     c->pix_sum   = pix_sum_c;
     c->pix_norm1 = pix_norm1_c;
 

     c->draw_edges = draw_edges_8_c;
 

     if (ARCH_ARM)
         ff_mpegvideoencdsp_init_arm(c, avctx);
     if (ARCH_PPC)
         ff_mpegvideoencdsp_init_ppc(c, avctx);

     if (ARCH_X86)
         ff_mpegvideoencdsp_init_x86(c, avctx);
 }