ffmpeg/libavcodec/h264pred.h

   1 /*
   2  * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
   3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * @file
  24  * H.264 / AVC / MPEG4 prediction functions.
  25  * @author Michael Niedermayer <michaelni@gmx.at>
  26  */
  27
  28 #ifndef AVCODEC_H264PRED_H
  29 #define AVCODEC_H264PRED_H
  30
  31 #include <stddef.h>
  32 #include <stdint.h>
  33
  34 /**
  35  * Prediction types
  36  */
  37 //@{
  38 #define VERT_PRED              0
  39 #define HOR_PRED               1
  40 #define DC_PRED                2
  41 #define DIAG_DOWN_LEFT_PRED    3
  42 #define DIAG_DOWN_RIGHT_PRED   4
  43 #define VERT_RIGHT_PRED        5
  44 #define HOR_DOWN_PRED          6
  45 #define VERT_LEFT_PRED         7
  46 #define HOR_UP_PRED            8
  47
  48 // DC edge (not for VP8)
  49 #define LEFT_DC_PRED           9
  50 #define TOP_DC_PRED           10
  51 #define DC_128_PRED           11
  52
  53 // RV40 specific
  54 #define DIAG_DOWN_LEFT_PRED_RV40_NODOWN   12
  55 #define HOR_UP_PRED_RV40_NODOWN           13
  56 #define VERT_LEFT_PRED_RV40_NODOWN        14
  57
  58 // VP8 specific
  59 #define TM_VP8_PRED            9    ///< "True Motion", used instead of plane
  60 #define VERT_VP8_PRED         10    ///< for VP8, #VERT_PRED is the average of
  61                                     ///< (left col+cur col x2+right col) / 4;
  62                                     ///< this is the "unaveraged" one
  63 #define HOR_VP8_PRED          14    ///< unaveraged version of #HOR_PRED, see
  64                                     ///< #VERT_VP8_PRED for details
  65 #define DC_127_PRED           12
  66 #define DC_129_PRED           13
  67
  68 #define DC_PRED8x8             0
  69 #define HOR_PRED8x8            1
  70 #define VERT_PRED8x8           2
  71 #define PLANE_PRED8x8          3
  72
  73 // DC edge
  74 #define LEFT_DC_PRED8x8        4
  75 #define TOP_DC_PRED8x8         5
  76 #define DC_128_PRED8x8         6
  77
  78 // H264/SVQ3 (8x8) specific
  79 #define ALZHEIMER_DC_L0T_PRED8x8  7
  80 #define ALZHEIMER_DC_0LT_PRED8x8  8
  81 #define ALZHEIMER_DC_L00_PRED8x8  9
  82 #define ALZHEIMER_DC_0L0_PRED8x8 10
  83
  84 // VP8 specific
  85 #define DC_127_PRED8x8         7
  86 #define DC_129_PRED8x8         8
  87 //@}
  88
  89 /**
  90  * Context for storing H.264 prediction functions
  91  */
  92 typedef struct H264PredContext {
  93     void(*pred4x4[9 + 3 + 3])(uint8_t *src, const uint8_t *topright,
  94                               ptrdiff_t stride);
  95     void(*pred8x8l[9 + 3])(uint8_t *src, int topleft, int topright,
  96                            ptrdiff_t stride);
  97     void(*pred8x8[4 + 3 + 4])(uint8_t *src, ptrdiff_t stride);
  98     void(*pred16x16[4 + 3 + 2])(uint8_t *src, ptrdiff_t stride);
  99
 100     void(*pred4x4_add[2])(uint8_t *pix /*align  4*/,
 101                           int16_t *block /*align 16*/, ptrdiff_t stride);
 102     void(*pred8x8l_add[2])(uint8_t *pix /*align  8*/,
 103                            int16_t *block /*align 16*/, ptrdiff_t stride);
 104     void(*pred8x8l_filter_add[2])(uint8_t *pix /*align  8*/,
 105                            int16_t *block /*align 16*/, int topleft, int topright, ptrdiff_t stride);
 106     void(*pred8x8_add[3])(uint8_t *pix /*align  8*/,
 107                           const int *block_offset,
 108                           int16_t *block /*align 16*/, ptrdiff_t stride);
 109     void(*pred16x16_add[3])(uint8_t *pix /*align 16*/,
 110                             const int *block_offset,
 111                             int16_t *block /*align 16*/, ptrdiff_t stride);
 112 } H264PredContext;
 113
 114 void ff_h264_pred_init(H264PredContext *h, int codec_id,
 115                        const int bit_depth, const int chroma_format_idc);
 116 void ff_h264_pred_init_arm(H264PredContext *h, int codec_id,
 117                            const int bit_depth, const int chroma_format_idc);
 118 void ff_h264_pred_init_x86(H264PredContext *h, int codec_id,
 119                            const int bit_depth, const int chroma_format_idc);
 120
 121 #endif /* AVCODEC_H264PRED_H */