mirror of https://github.com/mpv-player/mpv
114 lines
3.6 KiB
C
114 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 "common/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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static int config(struct vf_instance *vf, int width, int height,
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int d_width, int d_height,
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unsigned int flags, 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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int a_w = MP_ALIGN_DOWN(width, desc.align_x);
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vf_rescale_dsize(&d_width, &d_height, width, height, a_w, height);
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return vf_next_config(vf, a_w, height, d_width, d_height, flags, fmt);
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}
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static inline void mirror_4_m(uint8_t *dst, uint8_t *src, int p,
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int c0, int c1, int c2, int c3)
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{
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for (int x = 0; x < p; x++) {
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dst[x * 4 + 0] = src[(p - x - 1) * 4 + c0];
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dst[x * 4 + 1] = src[(p - x - 1) * 4 + c1];
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dst[x * 4 + 2] = src[(p - x - 1) * 4 + c2];
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dst[x * 4 + 3] = src[(p - x - 1) * 4 + c3];
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}
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}
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static inline void mirror(uint8_t *dst, uint8_t *src, int bp, int w)
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{
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for (int x = 0; x < w; x++)
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memcpy(dst + x * bp, src + (w - x - 1) * bp, bp);
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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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mp_image_t *dmpi = vf_alloc_out_image(vf);
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if (!dmpi)
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return NULL;
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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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for (int y = 0; y < mpi->plane_h[p]; y++) {
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void *p_src = mpi->planes[p] + mpi->stride[p] * y;
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void *p_dst = dmpi->planes[p] + dmpi->stride[p] * y;
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int w = dmpi->plane_w[p];
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if (mpi->imgfmt == IMGFMT_YUYV) {
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mirror_4_m(p_dst, p_src, w / 2, 2, 1, 0, 3);
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} else if (mpi->imgfmt == IMGFMT_UYVY) {
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mirror_4_m(p_dst, p_src, w / 2, 0, 3, 2, 1);
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} else {
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// make the compiler unroll the memcpy in mirror()
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switch (mpi->fmt.bytes[p]) {
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case 1: mirror(p_dst, p_src, 1, w); break;
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case 2: mirror(p_dst, p_src, 2, w); break;
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case 3: mirror(p_dst, p_src, 3, w); break;
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case 4: mirror(p_dst, p_src, 4, w); break;
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default:
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mirror(p_dst, p_src, mpi->fmt.bytes[p], w);
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}
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}
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}
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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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return vf_next_query_format(vf, fmt);
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}
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static int vf_open(vf_instance_t *vf){
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vf->config=config;
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vf->filter=filter;
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vf->query_format=query_format;
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return 1;
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}
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const vf_info_t vf_info_mirror = {
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.description = "horizontal mirror",
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.name = "mirror",
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.open = vf_open,
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};
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//===========================================================================//
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