mirror of https://github.com/mpv-player/mpv
151 lines
3.2 KiB
C
151 lines
3.2 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include "config.h"
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#include "mp_msg.h"
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#include "cpudetect.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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#include "postproc/rgb2rgb.h"
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struct vf_priv_s {
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int skipline;
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int scalew;
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int scaleh;
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};
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static void toright(unsigned char *dst[3], unsigned char *src[3],
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int dststride[3], int srcstride[3],
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int w, int h, struct vf_priv_s* p)
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{
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int k;
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for (k = 0; k < 3; k++) {
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unsigned char* fromL = src[k];
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unsigned char* fromR = src[k];
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unsigned char* to = dst[k];
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int src = srcstride[k];
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int dst = dststride[k];
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int ss;
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unsigned int dd;
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int i;
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if (k > 0) {
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i = h / 4 - p->skipline / 2;
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ss = src * (h / 4 + p->skipline / 2);
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dd = w / 4;
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} else {
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i = h / 2 - p->skipline;
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ss = src * (h / 2 + p->skipline);
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dd = w / 2;
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}
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fromR += ss;
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for ( ; i > 0; i--) {
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int j;
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unsigned char* t = to;
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unsigned char* sL = fromL;
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unsigned char* sR = fromR;
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if (p->scalew == 1) {
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for (j = dd; j > 0; j--) {
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*t++ = (sL[0] + sL[1]) / 2;
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sL+=2;
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}
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for (j = dd ; j > 0; j--) {
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*t++ = (sR[0] + sR[1]) / 2;
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sR+=2;
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}
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} else {
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for (j = dd * 2 ; j > 0; j--)
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*t++ = *sL++;
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for (j = dd * 2 ; j > 0; j--)
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*t++ = *sR++;
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}
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if (p->scaleh == 1) {
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memcpy(to + dst, to, dst);
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to += dst;
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}
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to += dst;
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fromL += src;
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fromR += src;
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}
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//printf("K %d %d %d %d %d \n", k, w, h, src, dst);
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}
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}
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static int put_image(struct vf_instance_s* vf, mp_image_t *mpi)
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{
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mp_image_t *dmpi;
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// hope we'll get DR buffer:
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dmpi=vf_get_image(vf->next, IMGFMT_YV12,
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MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE |
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(vf->priv->scaleh == 1) ? MP_IMGFLAG_READABLE : 0,
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mpi->w * vf->priv->scalew,
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mpi->h / vf->priv->scaleh - vf->priv->skipline);
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toright(dmpi->planes, mpi->planes, dmpi->stride,
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mpi->stride, mpi->w, mpi->h, vf->priv);
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return vf_next_put_image(vf,dmpi);
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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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{
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/* FIXME - also support UYVY output? */
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return vf_next_config(vf, width * vf->priv->scalew,
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height / vf->priv->scaleh - vf->priv->skipline, d_width, d_height, flags, IMGFMT_YV12);
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}
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static int query_format(struct vf_instance_s* vf, unsigned int fmt)
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{
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/* FIXME - really any YUV 4:2:0 input format should 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, IMGFMT_YV12);
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}
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return 0;
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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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{
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vf->config=config;
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vf->query_format=query_format;
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vf->put_image=put_image;
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vf->uninit=uninit;
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vf->priv = calloc(1, sizeof (struct vf_priv_s));
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vf->priv->skipline = 0;
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vf->priv->scalew = 1;
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vf->priv->scaleh = 2;
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if (args) sscanf(args, "%d:%d:%d", &vf->priv->skipline, &vf->priv->scalew, &vf->priv->scaleh);
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return 1;
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}
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vf_info_t vf_info_down3dright = {
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"convert stereo movie from top-bottom to left-right field",
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"down3dright",
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"Zdenek Kabelac",
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"",
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open,
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NULL
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};
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