mirror of https://github.com/mpv-player/mpv
137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
/*
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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 <inttypes.h>
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#include "config.h"
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#include "core/mp_msg.h"
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#include "video/img_format.h"
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#include "video/mp_image.h"
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#include "vf.h"
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struct vf_priv_s {
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int direction;
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};
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static void rotate(unsigned char* dst,unsigned char* src,int dststride,int srcstride,int w,int h,int bpp,int dir){
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int y;
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if(dir&1){
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src+=srcstride*(w-1);
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srcstride*=-1;
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}
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if(dir&2){
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dst+=dststride*(h-1);
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dststride*=-1;
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}
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for(y=0;y<h;y++){
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int x;
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switch(bpp){
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case 1:
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for(x=0;x<w;x++) dst[x]=src[y+x*srcstride];
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break;
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case 2:
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for(x=0;x<w;x++) *((short*)(dst+x*2))=*((short*)(src+y*2+x*srcstride));
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break;
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case 4:
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for(x=0;x<w;x++) *((int*)(dst+x*4))=*((int*)(src+y*4+x*srcstride));
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default:
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for(x=0;x<w;x++){
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for (int b=0;b<bpp;b++)
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dst[x*bpp+b]=src[b+y*bpp+x*srcstride];
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}
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break;
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}
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dst+=dststride;
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}
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}
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static int reconfig(struct vf_instance *vf, struct mp_image_params *p, int flags)
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{
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if (vf->priv->direction & 4) {
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if (p->w < p->h)
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vf->priv->direction &= 3;
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}
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if (vf->priv->direction & 4)
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return vf_next_reconfig(vf, p, flags);
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struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(p->imgfmt);
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int a_w = MP_ALIGN_DOWN(p->w, desc.align_x);
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int a_h = MP_ALIGN_DOWN(p->h, desc.align_y);
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vf_rescale_dsize(&p->d_w, &p->d_h, p->w, p->h, a_w, a_h);
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p->w = a_h;
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p->h = a_w;
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int t = p->d_w;
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p->d_w = p->d_h;
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p->d_h = t;
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return vf_next_reconfig(vf, p, flags);
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}
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static struct mp_image *filter(struct vf_instance *vf, struct mp_image *mpi)
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{
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if (vf->priv->direction & 4)
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return mpi;
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struct mp_image *dmpi = vf_alloc_out_image(vf);
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mp_image_copy_attributes(dmpi, mpi);
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for (int p = 0; p < mpi->num_planes; p++) {
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rotate(dmpi->planes[p],mpi->planes[p], dmpi->stride[p],mpi->stride[p],
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dmpi->plane_w[p], dmpi->plane_h[p], mpi->fmt.bytes[p],
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vf->priv->direction);
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}
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talloc_free(mpi);
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return dmpi;
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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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struct mp_imgfmt_desc desc = mp_imgfmt_get_desc(fmt);
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if (!(desc.flags & MP_IMGFLAG_BYTE_ALIGNED))
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return 0;
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if (desc.chroma_xs != desc.chroma_ys)
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return 0;
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if (desc.num_planes == 1 && (desc.chroma_xs || desc.chroma_ys))
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return 0;
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return vf_next_query_format(vf, fmt);
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}
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static int vf_open(vf_instance_t *vf, char *args){
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vf->reconfig=reconfig;
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vf->filter=filter;
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vf->query_format=query_format;
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vf->priv=malloc(sizeof(struct vf_priv_s));
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vf->priv->direction=args?atoi(args):0;
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return 1;
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}
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const vf_info_t vf_info_rotate = {
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"rotate",
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"rotate",
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"A'rpi",
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"",
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vf_open,
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NULL
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};
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//===========================================================================//
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