libmpcodecs/vf_decimate.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4
   5 #include "config.h"
   6 #include "mp_msg.h"
   7 #include "cpudetect.h"
   8
   9 #include "img_format.h"
  10 #include "mp_image.h"
  11 #include "vf.h"
  12
  13 #include "libvo/fastmemcpy.h"
  14
  15
  16 struct vf_priv_s {
  17         int hi, lo;
  18         float frac;
  19         int max, last, cnt;
  20 };
  21
  22 #ifdef HAVE_MMX
  23 static int diff_MMX(unsigned char *old, unsigned char *new, int os, int ns)
  24 {
  25         volatile short out[4];
  26         asm (
  27                 "movl $8, %%ecx \n\t"
  28                 "pxor %%mm4, %%mm4 \n\t"
  29                 "pxor %%mm7, %%mm7 \n\t"
  30
  31                 ASMALIGN(4)
  32                 "1: \n\t"
  33
  34                 "movq (%%"REG_S"), %%mm0 \n\t"
  35                 "movq (%%"REG_S"), %%mm2 \n\t"
  36                 "add %%"REG_a", %%"REG_S" \n\t"
  37                 "movq (%%"REG_D"), %%mm1 \n\t"
  38                 "add %%"REG_b", %%"REG_D" \n\t"
  39                 "psubusb %%mm1, %%mm2 \n\t"
  40                 "psubusb %%mm0, %%mm1 \n\t"
  41                 "movq %%mm2, %%mm0 \n\t"
  42                 "movq %%mm1, %%mm3 \n\t"
  43                 "punpcklbw %%mm7, %%mm0 \n\t"
  44                 "punpcklbw %%mm7, %%mm1 \n\t"
  45                 "punpckhbw %%mm7, %%mm2 \n\t"
  46                 "punpckhbw %%mm7, %%mm3 \n\t"
  47                 "paddw %%mm0, %%mm4 \n\t"
  48                 "paddw %%mm1, %%mm4 \n\t"
  49                 "paddw %%mm2, %%mm4 \n\t"
  50                 "paddw %%mm3, %%mm4 \n\t"
  51
  52                 "decl %%ecx \n\t"
  53                 "jnz 1b \n\t"
  54                 "movq %%mm4, (%%"REG_d") \n\t"
  55                 "emms \n\t"
  56                 :
  57                 : "S" (old), "D" (new), "a" ((long)os), "b" ((long)ns), "d" (out)
  58                 : "memory"
  59                 );
  60         return out[0]+out[1]+out[2]+out[3];
  61 }
  62 #endif
  63
  64 static int diff_C(unsigned char *old, unsigned char *new, int os, int ns)
  65 {
  66         int x, y, d=0;
  67         for (y = 8; y; y--) {
  68                 for (x = 8; x; x--) {
  69                         d += abs(new[x] - old[x]);
  70                 }
  71                 new += ns;
  72                 old += os;
  73         }
  74         return d;
  75 }
  76
  77 static int (*diff)(unsigned char *, unsigned char *, int, int);
  78
  79 static int diff_to_drop_plane(int hi, int lo, float frac, unsigned char *old, unsigned char *new, int w, int h, int os, int ns)
  80 {
  81         int x, y;
  82         int d, c=0;
  83         int t = (w/16)*(h/16)*frac;
  84         for (y = 0; y < h-7; y += 4) {
  85                 for (x = 8; x < w-7; x += 4) {
  86                         d = diff(old+x+y*os, new+x+y*ns, os, ns);
  87                         if (d > hi) return 0;
  88                         if (d > lo) {
  89                                 c++;
  90                                 if (c > t) return 0;
  91                         }
  92                 }
  93         }
  94         return 1;
  95 }
  96
  97 static int diff_to_drop(int hi, int lo, float frac, mp_image_t *old, mp_image_t *new)
  98 {
  99         if (new->flags & MP_IMGFLAG_PLANAR) {
 100                 return diff_to_drop_plane(hi,lo,frac, old->planes[0], new->planes[0],
 101                         new->w, new->h, old->stride[0], new->stride[0])
 102                         && diff_to_drop_plane(hi,lo,frac, old->planes[1], new->planes[1],
 103                         new->chroma_width, new->chroma_height,
 104                         old->stride[1], new->stride[1])
 105                         && diff_to_drop_plane(hi,lo,frac, old->planes[2], new->planes[2],
 106                         new->chroma_width, new->chroma_height,
 107                         old->stride[2], new->stride[2]);
 108         }
 109         return diff_to_drop_plane(hi,lo,frac, old->planes[0], new->planes[0],
 110                 new->w*(new->bpp/8), new->h, old->stride[0], new->stride[0]);
 111 }
 112
 113 static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts)
 114 {
 115         mp_image_t *dmpi;
 116
 117         dmpi = vf_get_image(vf->next, mpi->imgfmt,
 118                 MP_IMGTYPE_STATIC, MP_IMGFLAG_ACCEPT_STRIDE |
 119                 MP_IMGFLAG_PRESERVE | MP_IMGFLAG_READABLE,
 120                 mpi->width, mpi->height);
 121         dmpi->qscale = mpi->qscale;
 122         dmpi->qstride = mpi->qstride;
 123         dmpi->qscale_type = mpi->qscale_type;
 124
 125         if (diff_to_drop(vf->priv->hi, vf->priv->lo, vf->priv->frac, dmpi, mpi)) {
 126                 if (vf->priv->max == 0)
 127                         return 0;
 128                 else if ((vf->priv->max > 0) && (vf->priv->cnt++ < vf->priv->max))
 129                         return 0;
 130                 else if ((vf->priv->max < 0) && (vf->priv->last+1 >= -vf->priv->max))
 131                         return vf->priv->last=0;
 132         }
 133         vf->priv->last++;
 134         vf->priv->cnt=0;
 135
 136         memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h,
 137                 dmpi->stride[0], mpi->stride[0]);
 138         if (mpi->flags & MP_IMGFLAG_PLANAR) {
 139                 memcpy_pic(dmpi->planes[1], mpi->planes[1],
 140                         mpi->chroma_width, mpi->chroma_height,
 141                         dmpi->stride[1], mpi->stride[1]);
 142                 memcpy_pic(dmpi->planes[2], mpi->planes[2],
 143                         mpi->chroma_width, mpi->chroma_height,
 144                         dmpi->stride[2], mpi->stride[2]);
 145         }
 146         return vf_next_put_image(vf, dmpi, pts);
 147 }
 148
 149 static void uninit(struct vf_instance_s* vf)
 150 {
 151         free(vf->priv);
 152 }
 153
 154 static int open(vf_instance_t *vf, char* args)
 155 {
 156         struct vf_priv_s *p;
 157         vf->put_image = put_image;
 158         vf->uninit = uninit;
 159         vf->default_reqs = VFCAP_ACCEPT_STRIDE;
 160         vf->priv = p = calloc(1, sizeof(struct vf_priv_s));
 161         p->max = 0;
 162         p->hi = 64*12;
 163         p->lo = 64*5;
 164         p->frac = 0.33;
 165         if (args) sscanf(args, "%d:%d:%d:%f", &p->max, &p->hi, &p->lo, &p->frac);
 166         diff = diff_C;
 167 #ifdef HAVE_MMX
 168         if(gCpuCaps.hasMMX) diff = diff_MMX;
 169 #endif
 170         return 1;
 171 }
 172
 173 const vf_info_t vf_info_decimate = {
 174     "near-duplicate frame remover",
 175     "decimate",
 176     "Rich Felker",
 177     "",
 178     open,
 179     NULL
 180 };
 181
 182