libavfilter/libmpcodecs/vf_down3dright.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 #include <inttypes.h>
00023 
00024 #include "config.h"
00025 #include "mp_msg.h"
00026 #include "cpudetect.h"
00027 
00028 #include "img_format.h"
00029 #include "mp_image.h"
00030 #include "vf.h"
00031 
00032 #include "libvo/fastmemcpy.h"
00033 
00034 struct vf_priv_s {
00035         int skipline;
00036         int scalew;
00037         int scaleh;
00038 };
00039 
00040 static void toright(unsigned char *dst[3], unsigned char *src[3],
00041                     int dststride[3], int srcstride[3],
00042                     int w, int h, struct vf_priv_s* p)
00043 {
00044         int k;
00045 
00046         for (k = 0; k < 3; k++) {
00047                 unsigned char* fromL = src[k];
00048                 unsigned char* fromR = src[k];
00049                 unsigned char* to = dst[k];
00050                 int src = srcstride[k];
00051                 int dst = dststride[k];
00052                 int ss;
00053                 unsigned int dd;
00054                 int i;
00055 
00056                 if (k > 0) {
00057                         i = h / 4 - p->skipline / 2;
00058                         ss = src * (h / 4 + p->skipline / 2);
00059                         dd = w / 4;
00060                 } else {
00061                         i = h / 2 - p->skipline;
00062                         ss = src * (h / 2 + p->skipline);
00063                         dd = w / 2;
00064                 }
00065                 fromR += ss;
00066                 for ( ; i > 0; i--) {
00067                         int j;
00068                         unsigned char* t = to;
00069                         unsigned char* sL = fromL;
00070                         unsigned char* sR = fromR;
00071 
00072                         if (p->scalew == 1) {
00073                                 for (j = dd; j > 0; j--) {
00074                                         *t++ = (sL[0] + sL[1]) / 2;
00075                                         sL+=2;
00076                                 }
00077                                 for (j = dd ; j > 0; j--) {
00078                                         *t++ = (sR[0] + sR[1]) / 2;
00079                                         sR+=2;
00080                                 }
00081                         } else {
00082                                 for (j = dd * 2 ; j > 0; j--)
00083                                         *t++ = *sL++;
00084                                 for (j = dd * 2 ; j > 0; j--)
00085                                         *t++ = *sR++;
00086                         }
00087                         if (p->scaleh == 1) {
00088                                 fast_memcpy(to + dst, to, dst);
00089                                 to += dst;
00090                         }
00091                         to += dst;
00092                         fromL += src;
00093                         fromR += src;
00094                 }
00095                 //printf("K %d  %d   %d   %d  %d \n", k, w, h,  src, dst);
00096         }
00097 }
00098 
00099 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
00100 {
00101         mp_image_t *dmpi;
00102 
00103         // hope we'll get DR buffer:
00104         dmpi=vf_get_image(vf->next, IMGFMT_YV12,
00105                           MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE |
00106                           (vf->priv->scaleh == 1) ? MP_IMGFLAG_READABLE : 0,
00107                           mpi->w * vf->priv->scalew,
00108                           mpi->h / vf->priv->scaleh - vf->priv->skipline);
00109 
00110         toright(dmpi->planes, mpi->planes, dmpi->stride,
00111                 mpi->stride, mpi->w, mpi->h, vf->priv);
00112 
00113         return vf_next_put_image(vf,dmpi, pts);
00114 }
00115 
00116 static int config(struct vf_instance *vf,
00117                   int width, int height, int d_width, int d_height,
00118                   unsigned int flags, unsigned int outfmt)
00119 {
00120         /* FIXME - also support UYVY output? */
00121         return vf_next_config(vf, width * vf->priv->scalew,
00122                               height / vf->priv->scaleh - vf->priv->skipline, d_width, d_height, flags, IMGFMT_YV12);
00123 }
00124 
00125 
00126 static int query_format(struct vf_instance *vf, unsigned int fmt)
00127 {
00128         /* FIXME - really any YUV 4:2:0 input format should work */
00129         switch (fmt) {
00130         case IMGFMT_YV12:
00131         case IMGFMT_IYUV:
00132         case IMGFMT_I420:
00133                 return vf_next_query_format(vf, IMGFMT_YV12);
00134         }
00135         return 0;
00136 }
00137 
00138 static void uninit(struct vf_instance *vf)
00139 {
00140         free(vf->priv);
00141 }
00142 
00143 static int vf_open(vf_instance_t *vf, char *args)
00144 {
00145         vf->config=config;
00146         vf->query_format=query_format;
00147         vf->put_image=put_image;
00148         vf->uninit=uninit;
00149 
00150         vf->priv = calloc(1, sizeof (struct vf_priv_s));
00151         vf->priv->skipline = 0;
00152         vf->priv->scalew = 1;
00153         vf->priv->scaleh = 2;
00154         if (args) sscanf(args, "%d:%d:%d", &vf->priv->skipline, &vf->priv->scalew, &vf->priv->scaleh);
00155 
00156         return 1;
00157 }
00158 
00159 const vf_info_t vf_info_down3dright = {
00160         "convert stereo movie from top-bottom to left-right field",
00161         "down3dright",
00162         "Zdenek Kabelac",
00163         "",
00164         vf_open,
00165         NULL
00166 };