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libavfilter/libmpcodecs/vf_decimate.c

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00001 /*
00002  * This file is part of MPlayer.
00003  *
00004  * MPlayer is free software; you can redistribute it and/or modify
00005  * it under the terms of the GNU General Public License as published by
00006  * the Free Software Foundation; either version 2 of the License, or
00007  * (at your option) any later version.
00008  *
00009  * MPlayer is distributed in the hope that it will be useful,
00010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  * GNU General Public License for more details.
00013  *
00014  * You should have received a copy of the GNU General Public License along
00015  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
00016  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
00017  */
00018 
00019 #include <stdio.h>
00020 #include <stdlib.h>
00021 #include <string.h>
00022 
00023 #include "config.h"
00024 #include "mp_msg.h"
00025 #include "cpudetect.h"
00026 
00027 #include "img_format.h"
00028 #include "mp_image.h"
00029 #include "vf.h"
00030 
00031 #include "libvo/fastmemcpy.h"
00032 
00033 
00034 struct vf_priv_s {
00035     int hi, lo;
00036     float frac;
00037     int max, last, cnt;
00038 };
00039 
00040 #if HAVE_MMX && HAVE_EBX_AVAILABLE
00041 static int diff_MMX(unsigned char *old, unsigned char *new, int os, int ns)
00042 {
00043     volatile short out[4];
00044     __asm__ (
00045         "movl $8, %%ecx \n\t"
00046         "pxor %%mm4, %%mm4 \n\t"
00047         "pxor %%mm7, %%mm7 \n\t"
00048 
00049         ASMALIGN(4)
00050         "1: \n\t"
00051 
00052         "movq (%%"REG_S"), %%mm0 \n\t"
00053         "movq (%%"REG_S"), %%mm2 \n\t"
00054         "add %%"REG_a", %%"REG_S" \n\t"
00055         "movq (%%"REG_D"), %%mm1 \n\t"
00056         "add %%"REG_b", %%"REG_D" \n\t"
00057         "psubusb %%mm1, %%mm2 \n\t"
00058         "psubusb %%mm0, %%mm1 \n\t"
00059         "movq %%mm2, %%mm0 \n\t"
00060         "movq %%mm1, %%mm3 \n\t"
00061         "punpcklbw %%mm7, %%mm0 \n\t"
00062         "punpcklbw %%mm7, %%mm1 \n\t"
00063         "punpckhbw %%mm7, %%mm2 \n\t"
00064         "punpckhbw %%mm7, %%mm3 \n\t"
00065         "paddw %%mm0, %%mm4 \n\t"
00066         "paddw %%mm1, %%mm4 \n\t"
00067         "paddw %%mm2, %%mm4 \n\t"
00068         "paddw %%mm3, %%mm4 \n\t"
00069 
00070         "decl %%ecx \n\t"
00071         "jnz 1b \n\t"
00072         "movq %%mm4, (%%"REG_d") \n\t"
00073         "emms \n\t"
00074         :
00075         : "S" (old), "D" (new), "a" ((long)os), "b" ((long)ns), "d" (out)
00076         : "%ecx", "memory"
00077         );
00078     return out[0]+out[1]+out[2]+out[3];
00079 }
00080 #endif
00081 
00082 static int diff_C(unsigned char *old, unsigned char *new, int os, int ns)
00083 {
00084     int x, y, d=0;
00085     for (y = 8; y; y--) {
00086         for (x = 8; x; x--) {
00087             d += abs(new[x] - old[x]);
00088         }
00089         new += ns;
00090         old += os;
00091     }
00092     return d;
00093 }
00094 
00095 static int (*diff)(unsigned char *, unsigned char *, int, int);
00096 
00097 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)
00098 {
00099     int x, y;
00100     int d, c=0;
00101     int t = (w/16)*(h/16)*frac;
00102     for (y = 0; y < h-7; y += 4) {
00103         for (x = 8; x < w-7; x += 4) {
00104             d = diff(old+x+y*os, new+x+y*ns, os, ns);
00105             if (d > hi) return 0;
00106             if (d > lo) {
00107                 c++;
00108                 if (c > t) return 0;
00109             }
00110         }
00111     }
00112     return 1;
00113 }
00114 
00115 static int diff_to_drop(int hi, int lo, float frac, mp_image_t *old, mp_image_t *new)
00116 {
00117     if (new->flags & MP_IMGFLAG_PLANAR) {
00118         return diff_to_drop_plane(hi,lo,frac, old->planes[0], new->planes[0],
00119             new->w, new->h, old->stride[0], new->stride[0])
00120             && diff_to_drop_plane(hi,lo,frac, old->planes[1], new->planes[1],
00121             new->chroma_width, new->chroma_height,
00122             old->stride[1], new->stride[1])
00123             && diff_to_drop_plane(hi,lo,frac, old->planes[2], new->planes[2],
00124             new->chroma_width, new->chroma_height,
00125             old->stride[2], new->stride[2]);
00126     }
00127     return diff_to_drop_plane(hi,lo,frac, old->planes[0], new->planes[0],
00128         new->w*(new->bpp/8), new->h, old->stride[0], new->stride[0]);
00129 }
00130 
00131 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
00132 {
00133     mp_image_t *dmpi;
00134 
00135     dmpi = vf_get_image(vf->next, mpi->imgfmt,
00136         MP_IMGTYPE_STATIC, MP_IMGFLAG_ACCEPT_STRIDE |
00137         MP_IMGFLAG_PRESERVE | MP_IMGFLAG_READABLE,
00138         mpi->width, mpi->height);
00139     dmpi->qscale = mpi->qscale;
00140     dmpi->qstride = mpi->qstride;
00141     dmpi->qscale_type = mpi->qscale_type;
00142 
00143     if (diff_to_drop(vf->priv->hi, vf->priv->lo, vf->priv->frac, dmpi, mpi)) {
00144         if (vf->priv->max == 0)
00145             return 0;
00146         else if ((vf->priv->max > 0) && (vf->priv->cnt++ < vf->priv->max))
00147             return 0;
00148         else if ((vf->priv->max < 0) && (vf->priv->last+1 >= -vf->priv->max))
00149             return vf->priv->last=0;
00150     }
00151     vf->priv->last++;
00152     vf->priv->cnt=0;
00153 
00154     memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h,
00155         dmpi->stride[0], mpi->stride[0]);
00156     if (mpi->flags & MP_IMGFLAG_PLANAR) {
00157         memcpy_pic(dmpi->planes[1], mpi->planes[1],
00158             mpi->chroma_width, mpi->chroma_height,
00159             dmpi->stride[1], mpi->stride[1]);
00160         memcpy_pic(dmpi->planes[2], mpi->planes[2],
00161             mpi->chroma_width, mpi->chroma_height,
00162             dmpi->stride[2], mpi->stride[2]);
00163     }
00164     return vf_next_put_image(vf, dmpi, pts);
00165 }
00166 
00167 static void uninit(struct vf_instance *vf)
00168 {
00169     free(vf->priv);
00170 }
00171 
00172 static int vf_open(vf_instance_t *vf, char *args)
00173 {
00174     struct vf_priv_s *p;
00175     vf->put_image = put_image;
00176     vf->uninit = uninit;
00177     vf->default_reqs = VFCAP_ACCEPT_STRIDE;
00178     vf->priv = p = calloc(1, sizeof(struct vf_priv_s));
00179     p->max = 0;
00180     p->hi = 64*12;
00181     p->lo = 64*5;
00182     p->frac = 0.33;
00183     if (args) sscanf(args, "%d:%d:%d:%f", &p->max, &p->hi, &p->lo, &p->frac);
00184     diff = diff_C;
00185 #if HAVE_MMX && HAVE_EBX_AVAILABLE
00186     if(gCpuCaps.hasMMX) diff = diff_MMX;
00187 #endif
00188     return 1;
00189 }
00190 
00191 const vf_info_t vf_info_decimate = {
00192     "near-duplicate frame remover",
00193     "decimate",
00194     "Rich Felker",
00195     "",
00196     vf_open,
00197     NULL
00198 };

Generated on Wed Apr 11 2012 07:31:35 for FFmpeg by  doxygen 1.7.1