/*
  * Apple ProRes compatible decoder
  *
  * Copyright (c) 2010-2011 Maxim Poliakovski
  *

  * 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 "libavutil/attributes.h"
 #include "libavutil/common.h"

 #include "dct.h"

 #include "dsputil.h"

 #include "proresdsp.h"
 #include "simple_idct.h"
 
 #define BIAS     (1 << (PRORES_BITS_PER_SAMPLE - 1))           ///< bias value for converting signed pixels into unsigned ones
 #define CLIP_MIN (1 << (PRORES_BITS_PER_SAMPLE - 8))           ///< minimum value for clipping resulting pixels
 #define CLIP_MAX (1 << PRORES_BITS_PER_SAMPLE) - CLIP_MIN - 1  ///< maximum value for clipping resulting pixels
 
 #define CLIP_AND_BIAS(x) (av_clip((x) + BIAS, CLIP_MIN, CLIP_MAX))
 

 #if CONFIG_PRORES_DECODER | CONFIG_PRORES_LGPL_DECODER

 /**
  * Add bias value, clamp and output pixels of a slice
  */

 static void put_pixels(uint16_t *dst, int stride, const int16_t *in)

 {
     int x, y, src_offset, dst_offset;
 
     for (y = 0, dst_offset = 0; y < 8; y++, dst_offset += stride) {
         for (x = 0; x < 8; x++) {
             src_offset = (y << 3) + x;
 
             dst[dst_offset + x] = CLIP_AND_BIAS(in[src_offset]);
         }
     }
 }
 

 static void prores_idct_put_c(uint16_t *out, int linesize, int16_t *block, const int16_t *qmat)

 {
     ff_prores_idct(block, qmat);
     put_pixels(out, linesize >> 1, block);
 }

 #endif

 #if CONFIG_PRORES_KS_ENCODER

 static void prores_fdct_c(const uint16_t *src, int linesize, int16_t *block)

 {
     int x, y;
     const uint16_t *tsrc = src;
 
     for (y = 0; y < 8; y++) {
         for (x = 0; x < 8; x++)
             block[y * 8 + x] = tsrc[x];
         tsrc += linesize >> 1;
     }
     ff_jpeg_fdct_islow_10(block);
 }

 #endif

 av_cold void ff_proresdsp_init(ProresDSPContext *dsp, AVCodecContext *avctx)

 {

 #if CONFIG_PRORES_DECODER | CONFIG_PRORES_LGPL_DECODER

     dsp->idct_put = prores_idct_put_c;
     dsp->idct_permutation_type = FF_NO_IDCT_PERM;
 

     if (ARCH_X86) ff_proresdsp_x86_init(dsp, avctx);

     ff_init_scantable_permutation(dsp->idct_permutation,
                                   dsp->idct_permutation_type);

 #endif

 #if CONFIG_PRORES_KS_ENCODER

     dsp->fdct                 = prores_fdct_c;
     dsp->dct_permutation_type = FF_NO_IDCT_PERM;

     ff_init_scantable_permutation(dsp->dct_permutation,
                                   dsp->dct_permutation_type);

 #endif

 }