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ffmpeg / libavfilter / libmpcodecs / vf_harddup.c @ e4852fb3

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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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struct vf_priv_s {
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    mp_image_t *last_mpi;
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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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    mp_image_t *dmpi;
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    vf->priv->last_mpi = mpi;
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    dmpi = vf_get_image(vf->next, mpi->imgfmt,
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        MP_IMGTYPE_EXPORT, 0, mpi->width, mpi->height);
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    dmpi->planes[0] = mpi->planes[0];
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    dmpi->stride[0] = mpi->stride[0];
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    if (dmpi->flags&MP_IMGFLAG_PLANAR) {
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        dmpi->planes[1] = mpi->planes[1];
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        dmpi->stride[1] = mpi->stride[1];
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        dmpi->planes[2] = mpi->planes[2];
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        dmpi->stride[2] = mpi->stride[2];
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    }
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    return vf_next_put_image(vf, dmpi, pts);
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}
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static int control(struct vf_instance *vf, int request, void* data)
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{
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    switch (request) {
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    case VFCTRL_DUPLICATE_FRAME:
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        if (!vf->priv->last_mpi) break;
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        // This is a huge hack. We assume nothing
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        // has been called earlier in the filter chain
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        // since the last put_image. This is reasonable
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        // because we're handling a duplicate frame!
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        if (put_image(vf, vf->priv->last_mpi, MP_NOPTS_VALUE))
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            return CONTROL_TRUE;
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        break;
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    }
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    return vf_next_control(vf, request, data);
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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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    vf->put_image = put_image;
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    vf->control = control;
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    vf->uninit = uninit;
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    vf->priv = calloc(1, sizeof(struct vf_priv_s));
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    return 1;
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}
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const vf_info_t vf_info_harddup = {
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    "resubmit duplicate frames for encoding",
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    "harddup",
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    "Rich Felker",
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    "",
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    vf_open,
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    NULL
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};