/*
  * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
  *
  * 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

  * H.264 / AVC / MPEG4 prediction functions.
  * @author Michael Niedermayer <michaelni@gmx.at>
  */
 

 #ifndef AVCODEC_H264PRED_H
 #define AVCODEC_H264PRED_H

 #include <stddef.h>
 #include <stdint.h>

 
 /**
  * Prediction types
  */
 //@{

 #define VERT_PRED              0
 #define HOR_PRED               1
 #define DC_PRED                2
 #define DIAG_DOWN_LEFT_PRED    3
 #define DIAG_DOWN_RIGHT_PRED   4
 #define VERT_RIGHT_PRED        5
 #define HOR_DOWN_PRED          6
 #define VERT_LEFT_PRED         7
 #define HOR_UP_PRED            8

 // DC edge (not for VP8)

 #define LEFT_DC_PRED           9

 #define TOP_DC_PRED           10
 #define DC_128_PRED           11
 

 // RV40 specific

 #define DIAG_DOWN_LEFT_PRED_RV40_NODOWN   12
 #define HOR_UP_PRED_RV40_NODOWN           13

 #define VERT_LEFT_PRED_RV40_NODOWN        14

 // VP8 specific

 #define TM_VP8_PRED            9    ///< "True Motion", used instead of plane

 #define VERT_VP8_PRED         10    ///< for VP8, #VERT_PRED is the average of
                                     ///< (left col+cur col x2+right col) / 4;
                                     ///< this is the "unaveraged" one
 #define HOR_VP8_PRED          11    ///< unaveraged version of #HOR_PRED, see
                                     ///< #VERT_VP8_PRED for details
 #define DC_127_PRED           12
 #define DC_129_PRED           13
 

 #define DC_PRED8x8             0
 #define HOR_PRED8x8            1
 #define VERT_PRED8x8           2
 #define PLANE_PRED8x8          3

 // DC edge

 #define LEFT_DC_PRED8x8        4
 #define TOP_DC_PRED8x8         5
 #define DC_128_PRED8x8         6

 // H264/SVQ3 (8x8) specific

 #define ALZHEIMER_DC_L0T_PRED8x8  7
 #define ALZHEIMER_DC_0LT_PRED8x8  8
 #define ALZHEIMER_DC_L00_PRED8x8  9

 #define ALZHEIMER_DC_0L0_PRED8x8 10

 
 // VP8 specific

 #define DC_127_PRED8x8         7
 #define DC_129_PRED8x8         8

 //@}
 
 /**
  * Context for storing H.264 prediction functions
  */

 typedef struct H264PredContext {

     void(*pred4x4[9 + 3 + 3])(uint8_t *src, const uint8_t *topright,
                               ptrdiff_t stride);
     void(*pred8x8l[9 + 3])(uint8_t *src, int topleft, int topright,
                            ptrdiff_t stride);
     void(*pred8x8[4 + 3 + 4])(uint8_t *src, ptrdiff_t stride);
     void(*pred16x16[4 + 3 + 2])(uint8_t *src, ptrdiff_t stride);

     void(*pred4x4_add[2])(uint8_t *pix /*align  4*/,

                           int16_t *block /*align 16*/, ptrdiff_t stride);

     void(*pred8x8l_add[2])(uint8_t *pix /*align  8*/,

                            int16_t *block /*align 16*/, ptrdiff_t stride);

     void(*pred8x8_add[3])(uint8_t *pix /*align  8*/,
                           const int *block_offset,

                           int16_t *block /*align 16*/, ptrdiff_t stride);

     void(*pred16x16_add[3])(uint8_t *pix /*align 16*/,
                             const int *block_offset,

                             int16_t *block /*align 16*/, ptrdiff_t stride);

 } H264PredContext;

 void ff_h264_pred_init(H264PredContext *h, int codec_id,
                        const int bit_depth, const int chroma_format_idc);
 void ff_h264_pred_init_arm(H264PredContext *h, int codec_id,
                            const int bit_depth, const int chroma_format_idc);
 void ff_h264_pred_init_x86(H264PredContext *h, int codec_id,
                            const int bit_depth, const int chroma_format_idc);

 #endif /* AVCODEC_H264PRED_H */