mirror of https://github.com/mpv-player/mpv
72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
#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 "mp_image.h"
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#include "vf.h"
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struct vf_priv_s {
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int field;
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};
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//===========================================================================//
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static int config(struct vf_instance_s* 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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return vf_next_config(vf,width,height/2,d_width,d_height,flags,outfmt);
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}
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static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts){
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vf->dmpi=vf_get_image(vf->next,mpi->imgfmt,
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MP_IMGTYPE_EXPORT, MP_IMGFLAG_ACCEPT_STRIDE,
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mpi->width, mpi->height/2);
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// set up mpi as a double-stride image of dmpi:
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vf->dmpi->planes[0]=mpi->planes[0]+mpi->stride[0]*vf->priv->field;
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vf->dmpi->stride[0]=2*mpi->stride[0];
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if(vf->dmpi->flags&MP_IMGFLAG_PLANAR){
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vf->dmpi->planes[1]=mpi->planes[1]+
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mpi->stride[1]*vf->priv->field;
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vf->dmpi->stride[1]=2*mpi->stride[1];
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vf->dmpi->planes[2]=mpi->planes[2]+
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mpi->stride[2]*vf->priv->field;
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vf->dmpi->stride[2]=2*mpi->stride[2];
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} else
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vf->dmpi->planes[1]=mpi->planes[1]; // passthru bgr8 palette!!!
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return vf_next_put_image(vf,vf->dmpi, pts);
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}
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//===========================================================================//
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static void uninit(struct vf_instance_s* vf)
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{
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free(vf->priv);
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}
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static int open(vf_instance_t *vf, char* args){
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vf->config=config;
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vf->put_image=put_image;
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vf->uninit=uninit;
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vf->default_reqs=VFCAP_ACCEPT_STRIDE;
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vf->priv=calloc(1, sizeof(struct vf_priv_s));
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if (args) sscanf(args, "%d", &vf->priv->field);
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vf->priv->field &= 1;
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return 1;
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}
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const vf_info_t vf_info_field = {
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"extract single field",
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"field",
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"Rich Felker",
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"",
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open,
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NULL
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};
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//===========================================================================//
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