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ffmpeg / libavfilter / libmpcodecs / vf_tinterlace.c @ e4852fb3

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/*
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 * Copyright (C) 2003 Michael Zucchi <notzed@ximian.com>
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 *
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 * This file is part of MPlayer.
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 *
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 * MPlayer is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * MPlayer is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License along
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 * with MPlayer; if not, write to the Free Software Foundation, Inc.,
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 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "config.h"
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#include "mp_msg.h"
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#include "img_format.h"
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#include "mp_image.h"
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#include "vf.h"
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#include "libvo/fastmemcpy.h"
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struct vf_priv_s {
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    int mode;
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    int frame;
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    mp_image_t *dmpi;
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};
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static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts)
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{
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    int ret = 0;
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    mp_image_t *dmpi;
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    switch (vf->priv->mode) {
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    case 0:
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        dmpi = vf->priv->dmpi;
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        if (dmpi == NULL) {
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            dmpi = vf_get_image(vf->next, mpi->imgfmt,
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                        MP_IMGTYPE_STATIC, MP_IMGFLAG_ACCEPT_STRIDE |
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                        MP_IMGFLAG_PRESERVE,
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                        mpi->width, mpi->height*2);
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            vf->priv->dmpi = dmpi;
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            memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h,
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                   dmpi->stride[0]*2, mpi->stride[0]);
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            if (mpi->flags & MP_IMGFLAG_PLANAR) {
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                memcpy_pic(dmpi->planes[1], mpi->planes[1],
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                       mpi->chroma_width, mpi->chroma_height,
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                       dmpi->stride[1]*2, mpi->stride[1]);
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                memcpy_pic(dmpi->planes[2], mpi->planes[2],
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                       mpi->chroma_width, mpi->chroma_height,
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                       dmpi->stride[2]*2, mpi->stride[2]);
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            }
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        } else {
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            vf->priv->dmpi = NULL;
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            memcpy_pic(dmpi->planes[0]+dmpi->stride[0], mpi->planes[0], mpi->w, mpi->h,
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                   dmpi->stride[0]*2, mpi->stride[0]);
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            if (mpi->flags & MP_IMGFLAG_PLANAR) {
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                memcpy_pic(dmpi->planes[1]+dmpi->stride[1], mpi->planes[1],
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                       mpi->chroma_width, mpi->chroma_height,
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                       dmpi->stride[1]*2, mpi->stride[1]);
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                memcpy_pic(dmpi->planes[2]+dmpi->stride[2], mpi->planes[2],
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                       mpi->chroma_width, mpi->chroma_height,
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                       dmpi->stride[2]*2, mpi->stride[2]);
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            }
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            ret = vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
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        }
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        break;
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    case 1:
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        if (vf->priv->frame & 1)
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            ret = vf_next_put_image(vf, mpi, MP_NOPTS_VALUE);
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        break;
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    case 2:
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        if ((vf->priv->frame & 1) == 0)
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            ret = vf_next_put_image(vf, mpi, MP_NOPTS_VALUE);
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        break;
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    case 3:
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        dmpi = vf_get_image(vf->next, mpi->imgfmt,
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                    MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE,
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                    mpi->width, mpi->height*2);
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        /* fixme, just clear alternate lines */
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        vf_mpi_clear(dmpi, 0, 0, dmpi->w, dmpi->h);
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        if ((vf->priv->frame & 1) == 0) {
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            memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h,
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                   dmpi->stride[0]*2, mpi->stride[0]);
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            if (mpi->flags & MP_IMGFLAG_PLANAR) {
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                memcpy_pic(dmpi->planes[1], mpi->planes[1],
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                       mpi->chroma_width, mpi->chroma_height,
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                       dmpi->stride[1]*2, mpi->stride[1]);
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                memcpy_pic(dmpi->planes[2], mpi->planes[2],
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                       mpi->chroma_width, mpi->chroma_height,
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                       dmpi->stride[2]*2, mpi->stride[2]);
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            }
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        } else {
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            memcpy_pic(dmpi->planes[0]+dmpi->stride[0], mpi->planes[0], mpi->w, mpi->h,
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                   dmpi->stride[0]*2, mpi->stride[0]);
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            if (mpi->flags & MP_IMGFLAG_PLANAR) {
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                memcpy_pic(dmpi->planes[1]+dmpi->stride[1], mpi->planes[1],
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                       mpi->chroma_width, mpi->chroma_height,
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                       dmpi->stride[1]*2, mpi->stride[1]);
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                memcpy_pic(dmpi->planes[2]+dmpi->stride[2], mpi->planes[2],
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                       mpi->chroma_width, mpi->chroma_height,
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                       dmpi->stride[2]*2, mpi->stride[2]);
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            }
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        }
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        ret = vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
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        break;
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    case 4:
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        // Interleave even lines (only) from Frame 'i' with odd
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        // lines (only) from Frame 'i+1', halving the Frame
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        // rate and preserving image height.
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        dmpi = vf->priv->dmpi;
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        // @@ Need help:  Should I set dmpi->fields to indicate
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        // that the (new) frame will be interlaced!?  E.g. ...
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        // dmpi->fields |= MP_IMGFIELD_INTERLACED;
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        // dmpi->fields |= MP_IMGFIELD_TOP_FIRST;
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        // etc.
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        if (dmpi == NULL) {
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            dmpi = vf_get_image(vf->next, mpi->imgfmt,
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                        MP_IMGTYPE_STATIC, MP_IMGFLAG_ACCEPT_STRIDE |
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                        MP_IMGFLAG_PRESERVE,
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                        mpi->width, mpi->height);
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            vf->priv->dmpi = dmpi;
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            my_memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h/2,
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                      dmpi->stride[0]*2, mpi->stride[0]*2);
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            if (mpi->flags & MP_IMGFLAG_PLANAR) {
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                my_memcpy_pic(dmpi->planes[1], mpi->planes[1],
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                          mpi->chroma_width, mpi->chroma_height/2,
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                          dmpi->stride[1]*2, mpi->stride[1]*2);
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                my_memcpy_pic(dmpi->planes[2], mpi->planes[2],
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                          mpi->chroma_width, mpi->chroma_height/2,
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                          dmpi->stride[2]*2, mpi->stride[2]*2);
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            }
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        } else {
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            vf->priv->dmpi = NULL;
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            my_memcpy_pic(dmpi->planes[0]+dmpi->stride[0],
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                      mpi->planes[0]+mpi->stride[0],
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                      mpi->w, mpi->h/2,
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                      dmpi->stride[0]*2, mpi->stride[0]*2);
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            if (mpi->flags & MP_IMGFLAG_PLANAR) {
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                my_memcpy_pic(dmpi->planes[1]+dmpi->stride[1],
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                          mpi->planes[1]+mpi->stride[1],
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                          mpi->chroma_width, mpi->chroma_height/2,
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                          dmpi->stride[1]*2, mpi->stride[1]*2);
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                my_memcpy_pic(dmpi->planes[2]+dmpi->stride[2],
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                          mpi->planes[2]+mpi->stride[2],
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                          mpi->chroma_width, mpi->chroma_height/2,
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                          dmpi->stride[2]*2, mpi->stride[2]*2);
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            }
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            ret = vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
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        }
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        break;
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    }
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    vf->priv->frame++;
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    return ret;
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}
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static int query_format(struct vf_instance *vf, unsigned int fmt)
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{
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    /* FIXME - figure out which other formats work */
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    switch (fmt) {
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    case IMGFMT_YV12:
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    case IMGFMT_IYUV:
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    case IMGFMT_I420:
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        return vf_next_query_format(vf, fmt);
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    }
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    return 0;
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}
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static int config(struct vf_instance *vf,
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    int width, int height, int d_width, int d_height,
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    unsigned int flags, unsigned int outfmt)
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{
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    switch (vf->priv->mode) {
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    case 0:
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    case 3:
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        return vf_next_config(vf,width,height*2,d_width,d_height*2,flags,outfmt);
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    case 1:            /* odd frames */
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    case 2:            /* even frames */
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    case 4:            /* alternate frame (height-preserving) interlacing */
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        return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
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    }
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    return 0;
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}
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static void uninit(struct vf_instance *vf)
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{
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    free(vf->priv);
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}
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static int vf_open(vf_instance_t *vf, char *args)
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{
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    struct vf_priv_s *p;
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    vf->config = config;
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    vf->put_image = put_image;
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    vf->query_format = query_format;
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    vf->uninit = uninit;
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    vf->default_reqs = VFCAP_ACCEPT_STRIDE;
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    vf->priv = p = calloc(1, sizeof(struct vf_priv_s));
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    vf->priv->mode = 0;
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    if (args)
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      sscanf(args, "%d", &vf->priv->mode);
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    vf->priv->frame = 0;
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    return 1;
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}
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const vf_info_t vf_info_tinterlace = {
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    "temporal field interlacing",
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    "tinterlace",
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    "Michael Zucchi",
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    "",
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    vf_open,
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    NULL
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};