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  1. /*
  2.  * VP9 compatible video decoder
  3.  *
  4.  * Copyright (C) 2013 Ronald S. Bultje <rsbultje gmail com>
  5.  * Copyright (C) 2013 Clément Bœsch <u pkh me>
  6.  *
  7.  * This file is part of FFmpeg.
  8.  *
  9.  * FFmpeg is free software; you can redistribute it and/or
  10.  * modify it under the terms of the GNU Lesser General Public
  11.  * License as published by the Free Software Foundation; either
  12.  * version 2.1 of the License, or (at your option) any later version.
  13.  *
  14.  * FFmpeg is distributed in the hope that it will be useful,
  15.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17.  * Lesser General Public License for more details.
  18.  *
  19.  * You should have received a copy of the GNU Lesser General Public
  20.  * License along with FFmpeg; if not, write to the Free Software
  21.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22.  */
  23.  
  24. #ifndef AVCODEC_VP9DSP_H
  25. #define AVCODEC_VP9DSP_H
  26.  
  27. #include <stddef.h>
  28. #include <stdint.h>
  29.  
  30. #include "vp9.h"
  31.  
  32. typedef void (*vp9_mc_func)(uint8_t *dst, ptrdiff_t dst_stride,
  33.                             const uint8_t *ref, ptrdiff_t ref_stride,
  34.                             int h, int mx, int my);
  35. typedef void (*vp9_scaled_mc_func)(uint8_t *dst, ptrdiff_t dst_stride,
  36.                                    const uint8_t *ref, ptrdiff_t ref_stride,
  37.                                    int h, int mx, int my, int dx, int dy);
  38.  
  39. typedef struct VP9DSPContext {
  40.     /*
  41.      * dimension 1: 0=4x4, 1=8x8, 2=16x16, 3=32x32
  42.      * dimension 2: intra prediction modes
  43.      *
  44.      * dst/left/top is aligned by transform-size (i.e. 4, 8, 16 or 32 pixels)
  45.      * stride is aligned by 16 pixels
  46.      * top[-1] is top/left; top[4,7] is top-right for 4x4
  47.      */
  48.     // FIXME(rbultje) maybe replace left/top pointers with HAVE_TOP/
  49.     // HAVE_LEFT/HAVE_TOPRIGHT flags instead, and then handle it in-place?
  50.     // also needs to fit in with what h264/vp8/etc do
  51.     void (*intra_pred[N_TXFM_SIZES][N_INTRA_PRED_MODES])(uint8_t *dst,
  52.                                                          ptrdiff_t stride,
  53.                                                          const uint8_t *left,
  54.                                                          const uint8_t *top);
  55.  
  56.     /*
  57.      * dimension 1: 0=4x4, 1=8x8, 2=16x16, 3=32x32, 4=lossless (3-4=dct only)
  58.      * dimension 2: 0=dct/dct, 1=dct/adst, 2=adst/dct, 3=adst/adst
  59.      *
  60.      * dst is aligned by transform-size (i.e. 4, 8, 16 or 32 pixels)
  61.      * stride is aligned by 16 pixels
  62.      * block is 16-byte aligned
  63.      * eob indicates the position (+1) of the last non-zero coefficient,
  64.      * in scan-order. This can be used to write faster versions, e.g. a
  65.      * dc-only 4x4/8x8/16x16/32x32, or a 4x4-only (eob<10) 8x8/16x16/32x32,
  66.      * etc.
  67.      */
  68.     // FIXME also write idct_add_block() versions for whole (inter) pred
  69.     // blocks, so we can do 2 4x4s at once
  70.     void (*itxfm_add[N_TXFM_SIZES + 1][N_TXFM_TYPES])(uint8_t *dst,
  71.                                                       ptrdiff_t stride,
  72.                                                       int16_t *block, int eob);
  73.  
  74.     /*
  75.      * dimension 1: width of filter (0=4, 1=8, 2=16)
  76.      * dimension 2: 0=col-edge filter (h), 1=row-edge filter (v)
  77.      *
  78.      * dst/stride are aligned by 8
  79.      */
  80.     void (*loop_filter_8[3][2])(uint8_t *dst, ptrdiff_t stride,
  81.                                 int mb_lim, int lim, int hev_thr);
  82.  
  83.     /*
  84.      * dimension 1: 0=col-edge filter (h), 1=row-edge filter (v)
  85.      *
  86.      * The width of filter is assumed to be 16; dst/stride are aligned by 16
  87.      */
  88.     void (*loop_filter_16[2])(uint8_t *dst, ptrdiff_t stride,
  89.                               int mb_lim, int lim, int hev_thr);
  90.  
  91.     /*
  92.      * dimension 1/2: width of filter (0=4, 1=8) for each filter half
  93.      * dimension 3: 0=col-edge filter (h), 1=row-edge filter (v)
  94.      *
  95.      * dst/stride are aligned by operation size
  96.      * this basically calls loop_filter[d1][d3][0](), followed by
  97.      * loop_filter[d2][d3][0]() on the next 8 pixels
  98.      * mb_lim/lim/hev_thr contain two values in the lowest two bytes of the
  99.      * integer.
  100.      */
  101.     // FIXME perhaps a mix4 that operates on 32px (for AVX2)
  102.     void (*loop_filter_mix2[2][2][2])(uint8_t *dst, ptrdiff_t stride,
  103.                                       int mb_lim, int lim, int hev_thr);
  104.  
  105.     /*
  106.      * dimension 1: hsize (0: 64, 1: 32, 2: 16, 3: 8, 4: 4)
  107.      * dimension 2: filter type (0: smooth, 1: regular, 2: sharp, 3: bilin)
  108.      * dimension 3: averaging type (0: put, 1: avg)
  109.      * dimension 4: x subpel interpolation (0: none, 1: 8tap/bilin)
  110.      * dimension 5: y subpel interpolation (0: none, 1: 8tap/bilin)
  111.      *
  112.      * dst/stride are aligned by hsize
  113.      */
  114.     vp9_mc_func mc[5][4][2][2][2];
  115.  
  116.     /*
  117.      * for scalable MC, first 3 dimensions identical to above, the other two
  118.      * don't exist since it changes per stepsize.
  119.      */
  120.     vp9_scaled_mc_func smc[5][4][2];
  121. } VP9DSPContext;
  122.  
  123. void ff_vp9dsp_init(VP9DSPContext *dsp, int bpp);
  124.  
  125. void ff_vp9dsp_init_8(VP9DSPContext *dsp);
  126. void ff_vp9dsp_init_10(VP9DSPContext *dsp);
  127. void ff_vp9dsp_init_12(VP9DSPContext *dsp);
  128.  
  129. void ff_vp9dsp_init_x86(VP9DSPContext *dsp, int bpp);
  130. void ff_vp9dsp_init_mips(VP9DSPContext *dsp, int bpp);
  131.  
  132. #endif /* AVCODEC_VP9DSP_H */
  133.