libavfilter/libmpcodecs/vf_softskip.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 
00026 #include "img_format.h"
00027 #include "mp_image.h"
00028 #include "vf.h"
00029 
00030 struct vf_priv_s {
00031     int skipflag;
00032 };
00033 
00034 static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
00035 {
00036     mp_image_t *dmpi;
00037 
00038     if (vf->priv->skipflag)
00039         return vf->priv->skipflag = 0;
00040 
00041     dmpi = vf_get_image(vf->next, mpi->imgfmt,
00042         MP_IMGTYPE_EXPORT, 0, mpi->width, mpi->height);
00043     vf_clone_mpi_attributes(dmpi, mpi);
00044 
00045     dmpi->planes[0] = mpi->planes[0];
00046     dmpi->stride[0] = mpi->stride[0];
00047     if (dmpi->flags&MP_IMGFLAG_PLANAR) {
00048         dmpi->planes[1] = mpi->planes[1];
00049         dmpi->stride[1] = mpi->stride[1];
00050         dmpi->planes[2] = mpi->planes[2];
00051         dmpi->stride[2] = mpi->stride[2];
00052     }
00053 
00054     return vf_next_put_image(vf, dmpi, pts);
00055 }
00056 
00057 static int control(struct vf_instance *vf, int request, void* data)
00058 {
00059     switch (request) {
00060     case VFCTRL_SKIP_NEXT_FRAME:
00061         vf->priv->skipflag = 1;
00062         return CONTROL_TRUE;
00063     }
00064     return vf_next_control(vf, request, data);
00065 }
00066 
00067 #if 0
00068 static int query_format(struct vf_instance *vf, unsigned int fmt)
00069 {
00070     /* FIXME - figure out which other formats work */
00071     switch (fmt) {
00072     case IMGFMT_YV12:
00073     case IMGFMT_IYUV:
00074     case IMGFMT_I420:
00075         return vf_next_query_format(vf, fmt);
00076     }
00077     return 0;
00078 }
00079 #endif
00080 
00081 static void uninit(struct vf_instance *vf)
00082 {
00083     free(vf->priv);
00084 }
00085 
00086 static int vf_open(vf_instance_t *vf, char *args)
00087 {
00088     vf->put_image = put_image;
00089     vf->control = control;
00090     vf->uninit = uninit;
00091     vf->priv = calloc(1, sizeof(struct vf_priv_s));
00092     return 1;
00093 }
00094 
00095 const vf_info_t vf_info_softskip = {
00096     "soft (post-filter) frame skipping for encoding",
00097     "softskip",
00098     "Rich Felker",
00099     "",
00100     vf_open,
00101     NULL
00102 };