src/third_party/ffmpeg/libavcodec/diracdsp.c

   1 /*
   2  * Copyright (C) 2009 David Conrad
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include "dsputil.h"
  22 #include "diracdsp.h"
  23 #include "libavcodec/x86/diracdsp_mmx.h"
  24
  25 #define FILTER(src, stride)                                     \
  26     ((21*((src)[ 0*stride] + (src)[1*stride])                   \
  27       -7*((src)[-1*stride] + (src)[2*stride])                   \
  28       +3*((src)[-2*stride] + (src)[3*stride])                   \
  29       -1*((src)[-3*stride] + (src)[4*stride]) + 16) >> 5)
  30
  31 static void dirac_hpel_filter(uint8_t *dsth, uint8_t *dstv, uint8_t *dstc, const uint8_t *src,
  32                               int stride, int width, int height)
  33 {
  34     int x, y;
  35
  36     for (y = 0; y < height; y++) {
  37         for (x = -3; x < width+5; x++)
  38             dstv[x] = av_clip_uint8(FILTER(src+x, stride));
  39
  40         for (x = 0; x < width; x++)
  41             dstc[x] = av_clip_uint8(FILTER(dstv+x, 1));
  42
  43         for (x = 0; x < width; x++)
  44             dsth[x] = av_clip_uint8(FILTER(src+x, 1));
  45
  46         src  += stride;
  47         dsth += stride;
  48         dstv += stride;
  49         dstc += stride;
  50     }
  51 }
  52
  53 #define PIXOP_BILINEAR(PFX, OP, WIDTH)                                  \
  54     static void ff_ ## PFX ## _dirac_pixels ## WIDTH ## _bilinear_c(uint8_t *dst, const uint8_t *src[5], int stride, int h) \
  55     {                                                                   \
  56         int x;                                                          \
  57         const uint8_t *s0 = src[0];                                     \
  58         const uint8_t *s1 = src[1];                                     \
  59         const uint8_t *s2 = src[2];                                     \
  60         const uint8_t *s3 = src[3];                                     \
  61         const uint8_t *w  = src[4];                                     \
  62                                                                         \
  63         while (h--) {                                                   \
  64             for (x = 0; x < WIDTH; x++) {                               \
  65                 OP(dst[x], (s0[x]*w[0] + s1[x]*w[1] + s2[x]*w[2] + s3[x]*w[3] + 8) >> 4); \
  66             }                                                           \
  67                                                                         \
  68             dst += stride;                                              \
  69             s0 += stride;                                               \
  70             s1 += stride;                                               \
  71             s2 += stride;                                               \
  72             s3 += stride;                                               \
  73         }                                                               \
  74     }
  75
  76 #define OP_PUT(dst, val) (dst) = (val)
  77 #define OP_AVG(dst, val) (dst) = (((dst) + (val) + 1)>>1)
  78
  79 PIXOP_BILINEAR(put, OP_PUT, 8)
  80 PIXOP_BILINEAR(put, OP_PUT, 16)
  81 PIXOP_BILINEAR(put, OP_PUT, 32)
  82 PIXOP_BILINEAR(avg, OP_AVG, 8)
  83 PIXOP_BILINEAR(avg, OP_AVG, 16)
  84 PIXOP_BILINEAR(avg, OP_AVG, 32)
  85
  86 #define op_scale1(x)  block[x] = av_clip_uint8( (block[x]*weight + (1<<(log2_denom-1))) >> log2_denom)
  87 #define op_scale2(x)  dst[x] = av_clip_uint8( (src[x]*weights + dst[x]*weightd + (1<<(log2_denom-1))) >> log2_denom)
  88
  89 #define DIRAC_WEIGHT(W)                                                 \
  90     static void weight_dirac_pixels ## W ## _c(uint8_t *block, int stride, int log2_denom, \
  91                                                int weight, int h) {     \
  92         int x;                                                          \
  93         while (h--) {                                                   \
  94             for (x = 0; x < W; x++) {                                   \
  95                 op_scale1(x);                                           \
  96                 op_scale1(x+1);                                         \
  97             }                                                           \
  98             block += stride;                                            \
  99         }                                                               \
 100     }                                                                   \
 101     static void biweight_dirac_pixels ## W ## _c(uint8_t *dst, const uint8_t *src, int stride, int log2_denom, \
 102                                                  int weightd, int weights, int h) { \
 103         int x;                                                          \
 104         while (h--) {                                                   \
 105             for (x = 0; x < W; x++) {                                   \
 106                 op_scale2(x);                                           \
 107                 op_scale2(x+1);                                         \
 108             }                                                           \
 109             dst += stride;                                              \
 110             src += stride;                                              \
 111         }                                                               \
 112     }
 113
 114 DIRAC_WEIGHT(8)
 115 DIRAC_WEIGHT(16)
 116 DIRAC_WEIGHT(32)
 117
 118 #define ADD_OBMC(xblen)                                                 \
 119     static void add_obmc ## xblen ## _c(uint16_t *dst, const uint8_t *src, int stride, \
 120                                         const uint8_t *obmc_weight, int yblen) \
 121     {                                                                   \
 122         int x;                                                          \
 123         while (yblen--) {                                               \
 124             for (x = 0; x < xblen; x += 2) {                            \
 125                 dst[x  ] += src[x  ] * obmc_weight[x  ];                \
 126                 dst[x+1] += src[x+1] * obmc_weight[x+1];                \
 127             }                                                           \
 128             dst += stride;                                              \
 129             src += stride;                                              \
 130             obmc_weight += 32;                                          \
 131         }                                                               \
 132     }
 133
 134 ADD_OBMC(8)
 135 ADD_OBMC(16)
 136 ADD_OBMC(32)
 137
 138 static void put_signed_rect_clamped_c(uint8_t *dst, int dst_stride, const int16_t *src, int src_stride, int width, int height)
 139 {
 140     int x, y;
 141     for (y = 0; y < height; y++) {
 142         for (x = 0; x < width; x+=4) {
 143             dst[x  ] = av_clip_uint8(src[x  ] + 128);
 144             dst[x+1] = av_clip_uint8(src[x+1] + 128);
 145             dst[x+2] = av_clip_uint8(src[x+2] + 128);
 146             dst[x+3] = av_clip_uint8(src[x+3] + 128);
 147         }
 148         dst += dst_stride;
 149         src += src_stride;
 150     }
 151 }
 152
 153 static void add_rect_clamped_c(uint8_t *dst, const uint16_t *src, int stride,
 154                                const int16_t *idwt, int idwt_stride,
 155                                int width, int height)
 156 {
 157     int x, y;
 158
 159     for (y = 0; y < height; y++) {
 160         for (x = 0; x < width; x+=2) {
 161             dst[x  ] = av_clip_uint8(((src[x  ]+32)>>6) + idwt[x  ]);
 162             dst[x+1] = av_clip_uint8(((src[x+1]+32)>>6) + idwt[x+1]);
 163         }
 164         dst += stride;
 165         src += stride;
 166         idwt += idwt_stride;
 167     }
 168 }
 169
 170 #define PIXFUNC(PFX, WIDTH)                                             \
 171     c->PFX ## _dirac_pixels_tab[WIDTH>>4][0] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _c; \
 172     c->PFX ## _dirac_pixels_tab[WIDTH>>4][1] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _l2_c; \
 173     c->PFX ## _dirac_pixels_tab[WIDTH>>4][2] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _l4_c; \
 174     c->PFX ## _dirac_pixels_tab[WIDTH>>4][3] = ff_ ## PFX ## _dirac_pixels ## WIDTH ## _bilinear_c
 175
 176 void ff_diracdsp_init(DiracDSPContext *c)
 177 {
 178     c->dirac_hpel_filter = dirac_hpel_filter;
 179     c->add_rect_clamped = add_rect_clamped_c;
 180     c->put_signed_rect_clamped = put_signed_rect_clamped_c;
 181
 182     c->add_dirac_obmc[0] = add_obmc8_c;
 183     c->add_dirac_obmc[1] = add_obmc16_c;
 184     c->add_dirac_obmc[2] = add_obmc32_c;
 185
 186     c->weight_dirac_pixels_tab[0] = weight_dirac_pixels8_c;
 187     c->weight_dirac_pixels_tab[1] = weight_dirac_pixels16_c;
 188     c->weight_dirac_pixels_tab[2] = weight_dirac_pixels32_c;
 189     c->biweight_dirac_pixels_tab[0] = biweight_dirac_pixels8_c;
 190     c->biweight_dirac_pixels_tab[1] = biweight_dirac_pixels16_c;
 191     c->biweight_dirac_pixels_tab[2] = biweight_dirac_pixels32_c;
 192
 193     PIXFUNC(put, 8);
 194     PIXFUNC(put, 16);
 195     PIXFUNC(put, 32);
 196     PIXFUNC(avg, 8);
 197     PIXFUNC(avg, 16);
 198     PIXFUNC(avg, 32);
 199
 200     if (HAVE_MMX && HAVE_YASM) ff_diracdsp_init_mmx(c);
 201 }