/*

  * Bink DSP routines

  * Copyright (c) 2009 Konstantin Shishkov

  *
  * 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
  */
 
 /**

  * @file

  * Bink DSP routines

  */
 

 #include "config.h"

 #include "libavutil/attributes.h"

 #include "binkdsp.h"

 
 #define A1  2896 /* (1/sqrt(2))<<12 */
 #define A2  2217
 #define A3  3784
 #define A4 -5352
 
 #define IDCT_TRANSFORM(dest,s0,s1,s2,s3,s4,s5,s6,s7,d0,d1,d2,d3,d4,d5,d6,d7,munge,src) {\
     const int a0 = (src)[s0] + (src)[s4]; \
     const int a1 = (src)[s0] - (src)[s4]; \
     const int a2 = (src)[s2] + (src)[s6]; \
     const int a3 = (A1*((src)[s2] - (src)[s6])) >> 11; \
     const int a4 = (src)[s5] + (src)[s3]; \
     const int a5 = (src)[s5] - (src)[s3]; \
     const int a6 = (src)[s1] + (src)[s7]; \
     const int a7 = (src)[s1] - (src)[s7]; \
     const int b0 = a4 + a6; \
     const int b1 = (A3*(a5 + a7)) >> 11; \
     const int b2 = ((A4*a5) >> 11) - b0 + b1; \
     const int b3 = (A1*(a6 - a4) >> 11) - b2; \
     const int b4 = ((A2*a7) >> 11) + b3 - b1; \
     (dest)[d0] = munge(a0+a2   +b0); \
     (dest)[d1] = munge(a1+a3-a2+b2); \
     (dest)[d2] = munge(a1-a3+a2+b3); \
     (dest)[d3] = munge(a0-a2   -b4); \
     (dest)[d4] = munge(a0-a2   +b4); \
     (dest)[d5] = munge(a1-a3+a2-b3); \
     (dest)[d6] = munge(a1+a3-a2-b2); \
     (dest)[d7] = munge(a0+a2   -b0); \
 }
 /* end IDCT_TRANSFORM macro */
 
 #define MUNGE_NONE(x) (x)
 #define IDCT_COL(dest,src) IDCT_TRANSFORM(dest,0,8,16,24,32,40,48,56,0,8,16,24,32,40,48,56,MUNGE_NONE,src)
 
 #define MUNGE_ROW(x) (((x) + 0x7F)>>8)
 #define IDCT_ROW(dest,src) IDCT_TRANSFORM(dest,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7,MUNGE_ROW,src)
 

 static inline void bink_idct_col(int *dest, const int32_t *src)

 {
     if ((src[8]|src[16]|src[24]|src[32]|src[40]|src[48]|src[56])==0) {
         dest[0]  =
         dest[8]  =
         dest[16] =
         dest[24] =
         dest[32] =
         dest[40] =
         dest[48] =
         dest[56] = src[0];
     } else {
         IDCT_COL(dest, src);
     }
 }
 

 static void bink_idct_c(int32_t *block)

 {
     int i;

     int temp[64];

 
     for (i = 0; i < 8; i++)
         bink_idct_col(&temp[i], &block[i]);
     for (i = 0; i < 8; i++) {
         IDCT_ROW( (&block[8*i]), (&temp[8*i]) );
     }
 }
 

 static void bink_idct_add_c(uint8_t *dest, int linesize, int32_t *block)

 {
     int i, j;
 

     bink_idct_c(block);

     for (i = 0; i < 8; i++, dest += linesize, block += 8)
         for (j = 0; j < 8; j++)
              dest[j] += block[j];
 }
 

 static void bink_idct_put_c(uint8_t *dest, int linesize, int32_t *block)

 {
     int i;

     int temp[64];

     for (i = 0; i < 8; i++)
         bink_idct_col(&temp[i], &block[i]);
     for (i = 0; i < 8; i++) {
         IDCT_ROW( (&dest[i*linesize]), (&temp[8*i]) );
     }
 }

 static void scale_block_c(const uint8_t src[64]/*align 8*/, uint8_t *dst/*align 8*/, int linesize)
 {
     int i, j;
     uint16_t *dst1 = (uint16_t *) dst;
     uint16_t *dst2 = (uint16_t *)(dst + linesize);
 
     for (j = 0; j < 8; j++) {
         for (i = 0; i < 8; i++) {
             dst1[i] = dst2[i] = src[i] * 0x0101;
         }
         src  += 8;
         dst1 += linesize;
         dst2 += linesize;
     }
 }
 

 static void add_pixels8_c(uint8_t *av_restrict pixels, int16_t *block,

                           int line_size)
 {
     int i;
 
     for (i = 0; i < 8; i++) {
         pixels[0] += block[0];
         pixels[1] += block[1];
         pixels[2] += block[2];
         pixels[3] += block[3];
         pixels[4] += block[4];
         pixels[5] += block[5];
         pixels[6] += block[6];
         pixels[7] += block[7];
         pixels    += line_size;
         block     += 8;
     }
 }
 

 av_cold void ff_binkdsp_init(BinkDSPContext *c)

 {
     c->idct_add    = bink_idct_add_c;
     c->idct_put    = bink_idct_put_c;

     c->scale_block = scale_block_c;

     c->add_pixels8 = add_pixels8_c;

 }