/*

  * 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
  */
 
 #ifndef AVCODEC_IDCTDSP_H
 #define AVCODEC_IDCTDSP_H
 
 #include <stdint.h>
 
 #include "avcodec.h"
 
 /**
  * Scantable.
  */
 typedef struct ScanTable {
     const uint8_t *scantable;
     uint8_t permutated[64];
     uint8_t raster_end[64];
 } ScanTable;
 

 enum idct_permutation_type {
     FF_IDCT_PERM_NONE,
     FF_IDCT_PERM_LIBMPEG2,
     FF_IDCT_PERM_SIMPLE,
     FF_IDCT_PERM_TRANSPOSE,
     FF_IDCT_PERM_PARTTRANS,
     FF_IDCT_PERM_SSE2,
 };
 

 void ff_init_scantable(uint8_t *permutation, ScanTable *st,
                        const uint8_t *src_scantable);
 void ff_init_scantable_permutation(uint8_t *idct_permutation,

                                    enum idct_permutation_type perm_type);

 int ff_init_scantable_permutation_x86(uint8_t *idct_permutation,

                                       enum idct_permutation_type perm_type);

 
 typedef struct IDCTDSPContext {
     /* pixel ops : interface with DCT */
     void (*put_pixels_clamped)(const int16_t *block /* align 16 */,
                                uint8_t *pixels /* align 8 */,

                                ptrdiff_t line_size);

     void (*put_signed_pixels_clamped)(const int16_t *block /* align 16 */,
                                       uint8_t *pixels /* align 8 */,

                                       ptrdiff_t line_size);

     void (*add_pixels_clamped)(const int16_t *block /* align 16 */,
                                uint8_t *pixels /* align 8 */,

                                ptrdiff_t line_size);

 
     void (*idct)(int16_t *block /* align 16 */);
 
     /**
      * block -> idct -> clip to unsigned 8 bit -> dest.
      * (-1392, 0, 0, ...) -> idct -> (-174, -174, ...) -> put -> (0, 0, ...)
      * @param line_size size in bytes of a horizontal line of dest
      */
     void (*idct_put)(uint8_t *dest /* align 8 */,
                      int line_size, int16_t *block /* align 16 */);
 
     /**
      * block -> idct -> add dest -> clip to unsigned 8 bit -> dest.
      * @param line_size size in bytes of a horizontal line of dest
      */
     void (*idct_add)(uint8_t *dest /* align 8 */,
                      int line_size, int16_t *block /* align 16 */);
 
     /**
      * IDCT input permutation.
      * Several optimized IDCTs need a permutated input (relative to the
      * normal order of the reference IDCT).
      * This permutation must be performed before the idct_put/add.
      * Note, normally this can be merged with the zigzag/alternate scan<br>
      * An example to avoid confusion:
      * - (->decode coeffs -> zigzag reorder -> dequant -> reference IDCT -> ...)
      * - (x -> reference DCT -> reference IDCT -> x)
      * - (x -> reference DCT -> simple_mmx_perm = idct_permutation
      *    -> simple_idct_mmx -> x)
      * - (-> decode coeffs -> zigzag reorder -> simple_mmx_perm -> dequant
      *    -> simple_idct_mmx -> ...)
      */
     uint8_t idct_permutation[64];

     enum idct_permutation_type perm_type;

 } IDCTDSPContext;
 

 extern void (*ff_put_pixels_clamped)(const int16_t *block, uint8_t *pixels, ptrdiff_t line_size);
 extern void (*ff_add_pixels_clamped)(const int16_t *block, uint8_t *pixels, ptrdiff_t line_size);

 void ff_idctdsp_init(IDCTDSPContext *c, AVCodecContext *avctx);
 

 void ff_idctdsp_init_alpha(IDCTDSPContext *c, AVCodecContext *avctx,
                            unsigned high_bit_depth);

 void ff_idctdsp_init_arm(IDCTDSPContext *c, AVCodecContext *avctx,
                          unsigned high_bit_depth);
 void ff_idctdsp_init_ppc(IDCTDSPContext *c, AVCodecContext *avctx,
                          unsigned high_bit_depth);
 void ff_idctdsp_init_x86(IDCTDSPContext *c, AVCodecContext *avctx,
                          unsigned high_bit_depth);

 void ff_idctdsp_init_mips(IDCTDSPContext *c, AVCodecContext *avctx,
                           unsigned high_bit_depth);

 
 #endif /* AVCODEC_IDCTDSP_H */