mirror of https://github.com/mpv-player/mpv
749 lines
23 KiB
C
749 lines
23 KiB
C
/*
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* This file is part of mpv.
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*
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* mpv 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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* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
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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 <assert.h>
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#include <sys/types.h>
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#include <libavutil/common.h>
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#include <libavutil/mem.h>
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#include "config.h"
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#include "common/common.h"
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#include "common/global.h"
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#include "common/msg.h"
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#include "options/m_option.h"
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#include "options/m_config.h"
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#include "options/options.h"
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#include "video/img_format.h"
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#include "video/mp_image.h"
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#include "video/mp_image_pool.h"
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#include "vf.h"
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extern const vf_info_t vf_info_crop;
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extern const vf_info_t vf_info_expand;
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extern const vf_info_t vf_info_scale;
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extern const vf_info_t vf_info_format;
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extern const vf_info_t vf_info_noformat;
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extern const vf_info_t vf_info_flip;
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extern const vf_info_t vf_info_rotate;
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extern const vf_info_t vf_info_mirror;
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extern const vf_info_t vf_info_noise;
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extern const vf_info_t vf_info_eq;
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extern const vf_info_t vf_info_gradfun;
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extern const vf_info_t vf_info_unsharp;
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extern const vf_info_t vf_info_hqdn3d;
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extern const vf_info_t vf_info_dsize;
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extern const vf_info_t vf_info_pullup;
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extern const vf_info_t vf_info_delogo;
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extern const vf_info_t vf_info_sub;
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extern const vf_info_t vf_info_yadif;
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extern const vf_info_t vf_info_stereo3d;
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extern const vf_info_t vf_info_dlopen;
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extern const vf_info_t vf_info_lavfi;
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extern const vf_info_t vf_info_vaapi;
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extern const vf_info_t vf_info_vapoursynth;
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extern const vf_info_t vf_info_vapoursynth_lazy;
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extern const vf_info_t vf_info_vdpaupp;
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extern const vf_info_t vf_info_buffer;
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// list of available filters:
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static const vf_info_t *const filter_list[] = {
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&vf_info_crop,
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&vf_info_expand,
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&vf_info_scale,
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&vf_info_format,
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&vf_info_noformat,
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&vf_info_flip,
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#if HAVE_LIBAVFILTER
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&vf_info_mirror,
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&vf_info_lavfi,
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&vf_info_rotate,
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&vf_info_noise,
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&vf_info_gradfun,
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&vf_info_unsharp,
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&vf_info_hqdn3d,
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&vf_info_pullup,
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&vf_info_delogo,
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&vf_info_yadif,
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#endif
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&vf_info_eq,
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&vf_info_dsize,
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&vf_info_sub,
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&vf_info_stereo3d,
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&vf_info_buffer,
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#if HAVE_DLOPEN
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&vf_info_dlopen,
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#endif
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#if HAVE_VAPOURSYNTH_CORE && HAVE_VAPOURSYNTH
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&vf_info_vapoursynth,
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#endif
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#if HAVE_VAPOURSYNTH_CORE && HAVE_VAPOURSYNTH_LAZY
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&vf_info_vapoursynth_lazy,
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#endif
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#if HAVE_VAAPI_VPP
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&vf_info_vaapi,
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#endif
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#if HAVE_VDPAU
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&vf_info_vdpaupp,
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#endif
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NULL
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};
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static void vf_uninit_filter(vf_instance_t *vf);
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static bool get_desc(struct m_obj_desc *dst, int index)
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{
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if (index >= MP_ARRAY_SIZE(filter_list) - 1)
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return false;
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const vf_info_t *vf = filter_list[index];
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*dst = (struct m_obj_desc) {
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.name = vf->name,
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.description = vf->description,
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.priv_size = vf->priv_size,
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.priv_defaults = vf->priv_defaults,
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.options = vf->options,
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.p = vf,
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.print_help = vf->print_help,
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};
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return true;
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}
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// For the vf option
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const struct m_obj_list vf_obj_list = {
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.get_desc = get_desc,
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.description = "video filters",
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};
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// Try the cmd on each filter (starting with the first), and stop at the first
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// filter which does not return CONTROL_UNKNOWN for it.
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int vf_control_any(struct vf_chain *c, int cmd, void *arg)
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{
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for (struct vf_instance *cur = c->first; cur; cur = cur->next) {
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if (cur->control) {
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int r = cur->control(cur, cmd, arg);
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if (r != CONTROL_UNKNOWN)
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return r;
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}
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}
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return CONTROL_UNKNOWN;
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}
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int vf_control_by_label(struct vf_chain *c,int cmd, void *arg, bstr label)
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{
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char *label_str = bstrdup0(NULL, label);
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struct vf_instance *cur = vf_find_by_label(c, label_str);
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talloc_free(label_str);
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if (cur) {
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return cur->control ? cur->control(cur, cmd, arg) : CONTROL_NA;
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} else {
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return CONTROL_UNKNOWN;
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}
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}
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static void vf_control_all(struct vf_chain *c, int cmd, void *arg)
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{
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for (struct vf_instance *cur = c->first; cur; cur = cur->next) {
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if (cur->control)
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cur->control(cur, cmd, arg);
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}
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}
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static void vf_fix_img_params(struct mp_image *img, struct mp_image_params *p)
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{
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// Filters must absolutely set these correctly.
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assert(img->w == p->w && img->h == p->h);
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assert(img->imgfmt == p->imgfmt);
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// Too many things don't set this correctly.
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// If --colormatrix is used, decoder and filter chain disagree too.
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// In general, it's probably more convenient to force these here,
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// instead of requiring filters to set these correctly.
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img->params = *p;
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}
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// Get a new image for filter output, with size and pixel format according to
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// the last vf_config call.
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struct mp_image *vf_alloc_out_image(struct vf_instance *vf)
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{
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struct mp_image_params *p = &vf->fmt_out;
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assert(p->imgfmt);
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struct mp_image *img = mp_image_pool_get(vf->out_pool, p->imgfmt, p->w, p->h);
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if (img)
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vf_fix_img_params(img, p);
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return img;
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}
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// Returns false on failure; then the image can't be written to.
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bool vf_make_out_image_writeable(struct vf_instance *vf, struct mp_image *img)
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{
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struct mp_image_params *p = &vf->fmt_out;
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assert(p->imgfmt);
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assert(p->imgfmt == img->imgfmt);
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assert(p->w == img->w && p->h == img->h);
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return mp_image_pool_make_writeable(vf->out_pool, img);
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}
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//============================================================================
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// The default callback assumes all formats are passed through.
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static int vf_default_query_format(struct vf_instance *vf, unsigned int fmt)
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{
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return vf_next_query_format(vf, fmt);
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}
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void vf_print_filter_chain(struct vf_chain *c, int msglevel,
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struct vf_instance *vf)
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{
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if (!mp_msg_test(c->log, msglevel))
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return;
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char b[128] = {0};
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mp_snprintf_cat(b, sizeof(b), "%s", mp_image_params_to_str(&c->input_params));
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mp_msg(c->log, msglevel, " [vd] %s\n", b);
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for (vf_instance_t *f = c->first; f; f = f->next) {
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b[0] = '\0';
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mp_snprintf_cat(b, sizeof(b), " [%s] ", f->info->name);
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mp_snprintf_cat(b, sizeof(b), "%s", mp_image_params_to_str(&f->fmt_out));
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if (f->autoinserted)
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mp_snprintf_cat(b, sizeof(b), " [a]");
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if (f == vf)
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mp_snprintf_cat(b, sizeof(b), " <---");
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mp_msg(c->log, msglevel, "%s\n", b);
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}
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}
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static struct vf_instance *vf_open(struct vf_chain *c, const char *name,
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char **args)
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{
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struct m_obj_desc desc;
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if (!m_obj_list_find(&desc, &vf_obj_list, bstr0(name))) {
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MP_ERR(c, "Couldn't find video filter '%s'.\n", name);
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return NULL;
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}
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vf_instance_t *vf = talloc_zero(NULL, struct vf_instance);
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*vf = (vf_instance_t) {
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.info = desc.p,
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.log = mp_log_new(vf, c->log, name),
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.hwdec = c->hwdec,
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.query_format = vf_default_query_format,
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.out_pool = talloc_steal(vf, mp_image_pool_new(16)),
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.chain = c,
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};
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struct m_config *config = m_config_from_obj_desc(vf, vf->log, &desc);
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if (m_config_apply_defaults(config, name, c->opts->vf_defs) < 0)
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goto error;
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if (m_config_set_obj_params(config, args) < 0)
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goto error;
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vf->priv = config->optstruct;
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int retcode = vf->info->open(vf);
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if (retcode < 1)
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goto error;
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return vf;
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error:
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MP_ERR(c, "Creating filter '%s' failed.\n", name);
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talloc_free(vf);
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return NULL;
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}
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static vf_instance_t *vf_open_filter(struct vf_chain *c, const char *name,
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char **args)
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{
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int i, l = 0;
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for (i = 0; args && args[2 * i]; i++)
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l += 1 + strlen(args[2 * i]) + 1 + strlen(args[2 * i + 1]);
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l += strlen(name);
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char str[l + 1];
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char *p = str;
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p += sprintf(str, "%s", name);
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for (i = 0; args && args[2 * i]; i++)
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p += sprintf(p, " %s=%s", args[2 * i], args[2 * i + 1]);
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MP_INFO(c, "Opening video filter: [%s]\n", str);
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return vf_open(c, name, args);
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}
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void vf_remove_filter(struct vf_chain *c, struct vf_instance *vf)
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{
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assert(vf != c->first && vf != c->last); // these are sentinels
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struct vf_instance *prev = c->first;
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while (prev && prev->next != vf)
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prev = prev->next;
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assert(prev); // not inserted
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prev->next = vf->next;
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vf_uninit_filter(vf);
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}
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struct vf_instance *vf_append_filter(struct vf_chain *c, const char *name,
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char **args)
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{
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struct vf_instance *vf = vf_open_filter(c, name, args);
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if (vf) {
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// Insert it before the last filter, which is the "out" pseudo-filter
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// (But after the "in" pseudo-filter)
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struct vf_instance **pprev = &c->first->next;
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while (*pprev && (*pprev)->next)
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pprev = &(*pprev)->next;
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vf->next = *pprev ? *pprev : NULL;
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*pprev = vf;
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}
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return vf;
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}
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int vf_append_filter_list(struct vf_chain *c, struct m_obj_settings *list)
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{
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for (int n = 0; list && list[n].name; n++) {
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struct vf_instance *vf =
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vf_append_filter(c, list[n].name, list[n].attribs);
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if (vf) {
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if (list[n].label) {
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vf->label = talloc_strdup(vf, list[n].label);
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} else {
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for (int i = 0; i < 100; i++) {
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char* label = talloc_asprintf(vf, "%s.%02d", list[n].name, i);
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if (vf_find_by_label(c, label)) {
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talloc_free(label);
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} else {
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vf->label = label;
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break;
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}
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}
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}
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}
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}
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return 0;
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}
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// Used by filters to add a filtered frame to the output queue.
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// Ownership of img is transferred from caller to the filter chain.
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void vf_add_output_frame(struct vf_instance *vf, struct mp_image *img)
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{
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if (img) {
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vf_fix_img_params(img, &vf->fmt_out);
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MP_TARRAY_APPEND(vf, vf->out_queued, vf->num_out_queued, img);
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}
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}
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static bool vf_has_output_frame(struct vf_instance *vf)
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{
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if (!vf->num_out_queued && vf->filter_out) {
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if (vf->filter_out(vf) < 0)
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MP_ERR(vf, "Error filtering frame.\n");
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}
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return vf->num_out_queued > 0;
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}
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static struct mp_image *vf_dequeue_output_frame(struct vf_instance *vf)
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{
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struct mp_image *res = NULL;
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if (vf_has_output_frame(vf)) {
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res = vf->out_queued[0];
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MP_TARRAY_REMOVE_AT(vf->out_queued, vf->num_out_queued, 0);
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}
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return res;
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}
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static int vf_do_filter(struct vf_instance *vf, struct mp_image *img)
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{
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assert(vf->fmt_in.imgfmt);
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if (img)
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assert(mp_image_params_equal(&img->params, &vf->fmt_in));
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if (vf->filter_ext) {
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int r = vf->filter_ext(vf, img);
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if (r < 0)
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MP_ERR(vf, "Error filtering frame.\n");
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return r;
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} else {
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if (img) {
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if (vf->filter)
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img = vf->filter(vf, img);
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vf_add_output_frame(vf, img);
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}
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return 0;
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}
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}
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// Input a frame into the filter chain. Ownership of img is transferred.
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// Return >= 0 on success, < 0 on failure (even if output frames were produced)
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int vf_filter_frame(struct vf_chain *c, struct mp_image *img)
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{
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assert(img);
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if (c->initialized < 1) {
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talloc_free(img);
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return -1;
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}
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assert(mp_image_params_equal(&img->params, &c->input_params));
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vf_fix_img_params(img, &c->override_params);
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return vf_do_filter(c->first, img);
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}
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// Similar to vf_output_frame(), but only ensure that the filter "until" has
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// output, instead of the end of the filter chain.
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static int vf_output_frame_until(struct vf_chain *c, struct vf_instance *until,
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bool eof)
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{
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if (until->num_out_queued)
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return 1;
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if (c->initialized < 1)
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return -1;
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while (1) {
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struct vf_instance *last = NULL;
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for (struct vf_instance * cur = c->first; cur; cur = cur->next) {
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// Flush remaining frames on EOF, but do that only if the previous
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// filters have been flushed (i.e. they have no more output).
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if (eof && !last) {
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int r = vf_do_filter(cur, NULL);
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if (r < 0)
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return r;
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}
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if (vf_has_output_frame(cur))
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last = cur;
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if (cur == until)
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break;
|
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}
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if (!last)
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return 0;
|
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if (last == until)
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return 1;
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int r = vf_do_filter(last->next, vf_dequeue_output_frame(last));
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if (r < 0)
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return r;
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}
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}
|
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|
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// Output the next queued image (if any) from the full filter chain.
|
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// The frame can be retrieved with vf_read_output_frame().
|
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// eof: if set, assume there's no more input i.e. vf_filter_frame() will
|
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// not be called (until reset) - flush all internally delayed frames
|
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// returns: -1: error, 0: no output, 1: output available
|
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int vf_output_frame(struct vf_chain *c, bool eof)
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{
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return vf_output_frame_until(c, c->last, eof);
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}
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struct mp_image *vf_read_output_frame(struct vf_chain *c)
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{
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if (!c->last->num_out_queued)
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vf_output_frame(c, false);
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return vf_dequeue_output_frame(c->last);
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}
|
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|
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// Some filters (vf_vapoursynth) filter on separate threads, and may need new
|
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// input from the decoder, even though the core does not need a new output image
|
|
// yet (this is required to get proper pipelining in the filter). If the filter
|
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// needs new data, it will call c->wakeup_callback, which in turn causes the
|
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// core to recheck the filter chain, calling this function. Each filter is asked
|
|
// whether it needs a frame (with vf->needs_input), and if so, it will try to
|
|
// feed it a new frame. If this fails, it will request a new frame from the
|
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// core by returning 1.
|
|
// returns -1: error, 0: nothing needed, 1: add new frame with vf_filter_frame()
|
|
int vf_needs_input(struct vf_chain *c)
|
|
{
|
|
struct vf_instance *prev = c->first;
|
|
for (struct vf_instance *cur = c->first; cur; cur = cur->next) {
|
|
while (cur->needs_input && cur->needs_input(cur)) {
|
|
// Get frames from preceding filters, or if there are none,
|
|
// request new frames from decoder.
|
|
int r = vf_output_frame_until(c, prev, false);
|
|
if (r < 1)
|
|
return r < 0 ? -1 : 1;
|
|
r = vf_do_filter(cur, vf_dequeue_output_frame(prev));
|
|
if (r < 0)
|
|
return r;
|
|
}
|
|
prev = cur;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void vf_forget_frames(struct vf_instance *vf)
|
|
{
|
|
for (int n = 0; n < vf->num_out_queued; n++)
|
|
talloc_free(vf->out_queued[n]);
|
|
vf->num_out_queued = 0;
|
|
}
|
|
|
|
static void vf_chain_forget_frames(struct vf_chain *c)
|
|
{
|
|
for (struct vf_instance *cur = c->first; cur; cur = cur->next)
|
|
vf_forget_frames(cur);
|
|
}
|
|
|
|
void vf_seek_reset(struct vf_chain *c)
|
|
{
|
|
vf_control_all(c, VFCTRL_SEEK_RESET, NULL);
|
|
vf_chain_forget_frames(c);
|
|
}
|
|
|
|
int vf_next_config(struct vf_instance *vf,
|
|
int width, int height, int d_width, int d_height,
|
|
unsigned int voflags, unsigned int outfmt)
|
|
{
|
|
vf->fmt_out = vf->fmt_in;
|
|
vf->fmt_out.imgfmt = outfmt;
|
|
vf->fmt_out.w = width;
|
|
vf->fmt_out.h = height;
|
|
vf->fmt_out.d_w = d_width;
|
|
vf->fmt_out.d_h = d_height;
|
|
return 1;
|
|
}
|
|
|
|
int vf_next_query_format(struct vf_instance *vf, unsigned int fmt)
|
|
{
|
|
return fmt >= IMGFMT_START && fmt < IMGFMT_END
|
|
? vf->last_outfmts[fmt - IMGFMT_START] : 0;
|
|
}
|
|
|
|
// Mark accepted input formats in fmts[]. Note that ->query_format will
|
|
// typically (but not always) call vf_next_query_format() to check whether
|
|
// an output format is supported.
|
|
static void query_formats(uint8_t *fmts, struct vf_instance *vf)
|
|
{
|
|
for (int n = IMGFMT_START; n < IMGFMT_END; n++)
|
|
fmts[n - IMGFMT_START] = vf->query_format(vf, n);
|
|
}
|
|
|
|
static bool is_conv_filter(struct vf_instance *vf)
|
|
{
|
|
return vf && strcmp(vf->info->name, "scale") == 0;
|
|
}
|
|
|
|
static void update_formats(struct vf_chain *c, struct vf_instance *vf,
|
|
uint8_t *fmts)
|
|
{
|
|
if (vf->next)
|
|
update_formats(c, vf->next, vf->last_outfmts);
|
|
query_formats(fmts, vf);
|
|
bool has_in = false, has_out = false;
|
|
for (int n = IMGFMT_START; n < IMGFMT_END; n++) {
|
|
has_in |= !!fmts[n - IMGFMT_START];
|
|
has_out |= !!vf->last_outfmts[n - IMGFMT_START];
|
|
}
|
|
if (has_out && !has_in && !is_conv_filter(vf) &&
|
|
!is_conv_filter(vf->next))
|
|
{
|
|
// If there are output formats, but no input formats (meaning the
|
|
// filters after vf work, but vf can't output any format the filters
|
|
// after it accept), try to insert a conversion filter.
|
|
MP_INFO(c, "Using conversion filter.\n");
|
|
struct vf_instance *conv = vf_open(c, "scale", NULL);
|
|
if (conv) {
|
|
conv->autoinserted = true;
|
|
conv->next = vf->next;
|
|
vf->next = conv;
|
|
update_formats(c, conv, vf->last_outfmts);
|
|
query_formats(fmts, vf);
|
|
}
|
|
}
|
|
for (int n = IMGFMT_START; n < IMGFMT_END; n++)
|
|
has_in |= !!fmts[n - IMGFMT_START];
|
|
if (!has_in) {
|
|
// Pretend all out formats work. All this does it getting better
|
|
// error messages in some cases, so we can configure all filter
|
|
// until it fails, which will be visible in vf_print_filter_chain().
|
|
for (int n = IMGFMT_START; n < IMGFMT_END; n++)
|
|
vf->last_outfmts[n - IMGFMT_START] = 1;
|
|
query_formats(fmts, vf);
|
|
}
|
|
}
|
|
|
|
static int vf_reconfig_wrapper(struct vf_instance *vf,
|
|
const struct mp_image_params *p)
|
|
{
|
|
vf_forget_frames(vf);
|
|
if (vf->out_pool)
|
|
mp_image_pool_clear(vf->out_pool);
|
|
|
|
if (!vf->query_format(vf, p->imgfmt))
|
|
return -2;
|
|
|
|
vf->fmt_out = vf->fmt_in = *p;
|
|
|
|
if (!mp_image_params_valid(&vf->fmt_in))
|
|
return -2;
|
|
|
|
int r;
|
|
if (vf->reconfig) {
|
|
r = vf->reconfig(vf, &vf->fmt_in, &vf->fmt_out);
|
|
} else if (vf->config) {
|
|
r = vf->config(vf, p->w, p->h, p->d_w, p->d_h, 0, p->imgfmt) ? 0 : -1;
|
|
} else {
|
|
r = 0;
|
|
}
|
|
|
|
if (!mp_image_params_equal(&vf->fmt_in, p))
|
|
r = -2;
|
|
|
|
if (!mp_image_params_valid(&vf->fmt_out))
|
|
r = -2;
|
|
|
|
// Fix csp in case of pixel format change
|
|
if (r >= 0)
|
|
mp_image_params_guess_csp(&vf->fmt_out);
|
|
|
|
return r;
|
|
}
|
|
|
|
// override_params is used to forcibly change the parameters of input images,
|
|
// while params has to match the input images exactly.
|
|
int vf_reconfig(struct vf_chain *c, const struct mp_image_params *params,
|
|
const struct mp_image_params *override_params)
|
|
{
|
|
int r = 0;
|
|
vf_chain_forget_frames(c);
|
|
for (struct vf_instance *vf = c->first; vf; ) {
|
|
struct vf_instance *next = vf->next;
|
|
if (vf->autoinserted)
|
|
vf_remove_filter(c, vf);
|
|
vf = next;
|
|
}
|
|
c->input_params = *params;
|
|
c->first->fmt_in = *override_params;
|
|
c->override_params = *override_params;
|
|
struct mp_image_params cur = c->override_params;
|
|
|
|
uint8_t unused[IMGFMT_END - IMGFMT_START];
|
|
update_formats(c, c->first, unused);
|
|
struct vf_instance *failing = NULL;
|
|
for (struct vf_instance *vf = c->first; vf; vf = vf->next) {
|
|
r = vf_reconfig_wrapper(vf, &cur);
|
|
if (r < 0) {
|
|
failing = vf;
|
|
break;
|
|
}
|
|
cur = vf->fmt_out;
|
|
}
|
|
c->output_params = cur;
|
|
c->initialized = r < 0 ? -1 : 1;
|
|
int loglevel = r < 0 ? MSGL_WARN : MSGL_V;
|
|
if (r == -2)
|
|
MP_ERR(c, "Image formats incompatible or invalid.\n");
|
|
mp_msg(c->log, loglevel, "Video filter chain:\n");
|
|
vf_print_filter_chain(c, loglevel, failing);
|
|
if (r < 0) {
|
|
c->input_params = c->override_params = c->output_params =
|
|
(struct mp_image_params){0};
|
|
}
|
|
return r;
|
|
}
|
|
|
|
struct vf_instance *vf_find_by_label(struct vf_chain *c, const char *label)
|
|
{
|
|
struct vf_instance *vf = c->first;
|
|
while (vf) {
|
|
if (vf->label && label && strcmp(vf->label, label) == 0)
|
|
return vf;
|
|
vf = vf->next;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
static void vf_uninit_filter(vf_instance_t *vf)
|
|
{
|
|
if (vf->uninit)
|
|
vf->uninit(vf);
|
|
vf_forget_frames(vf);
|
|
talloc_free(vf);
|
|
}
|
|
|
|
static int input_query_format(struct vf_instance *vf, unsigned int fmt)
|
|
{
|
|
// Setting fmt_in is guaranteed by vf_reconfig().
|
|
if (fmt == vf->fmt_in.imgfmt)
|
|
return vf_next_query_format(vf, fmt);
|
|
return 0;
|
|
}
|
|
|
|
static int output_query_format(struct vf_instance *vf, unsigned int fmt)
|
|
{
|
|
struct vf_chain *c = (void *)vf->priv;
|
|
if (fmt >= IMGFMT_START && fmt < IMGFMT_END)
|
|
return c->allowed_output_formats[fmt - IMGFMT_START];
|
|
return 0;
|
|
}
|
|
|
|
struct vf_chain *vf_new(struct mpv_global *global)
|
|
{
|
|
struct vf_chain *c = talloc_ptrtype(NULL, c);
|
|
*c = (struct vf_chain){
|
|
.opts = global->opts,
|
|
.log = mp_log_new(c, global->log, "!vf"),
|
|
.global = global,
|
|
};
|
|
static const struct vf_info in = { .name = "in" };
|
|
c->first = talloc(c, struct vf_instance);
|
|
*c->first = (struct vf_instance) {
|
|
.info = &in,
|
|
.query_format = input_query_format,
|
|
};
|
|
static const struct vf_info out = { .name = "out" };
|
|
c->last = talloc(c, struct vf_instance);
|
|
*c->last = (struct vf_instance) {
|
|
.info = &out,
|
|
.query_format = output_query_format,
|
|
.priv = (void *)c,
|
|
};
|
|
c->first->next = c->last;
|
|
return c;
|
|
}
|
|
|
|
void vf_destroy(struct vf_chain *c)
|
|
{
|
|
if (!c)
|
|
return;
|
|
while (c->first) {
|
|
vf_instance_t *vf = c->first;
|
|
c->first = vf->next;
|
|
vf_uninit_filter(vf);
|
|
}
|
|
vf_chain_forget_frames(c);
|
|
talloc_free(c);
|
|
}
|
|
|
|
// When changing the size of an image that had old_w/old_h with
|
|
// DAR *d_width/*d_height to the new size new_w/new_h, adjust
|
|
// *d_width/*d_height such that the new image has the same pixel aspect ratio.
|
|
void vf_rescale_dsize(int *d_width, int *d_height, int old_w, int old_h,
|
|
int new_w, int new_h)
|
|
{
|
|
*d_width = *d_width * new_w / old_w;
|
|
*d_height = *d_height * new_h / old_h;
|
|
}
|
|
|
|
// Set *d_width/*d_height to display aspect ratio with the givem source size
|
|
void vf_set_dar(int *d_w, int *d_h, int w, int h, double dar)
|
|
{
|
|
*d_w = w;
|
|
*d_h = h;
|
|
if (dar > 0.01) {
|
|
*d_w = h * dar + 0.5;
|
|
// we don't like horizontal downscale
|
|
if (*d_w < w) {
|
|
*d_w = w;
|
|
*d_h = w / dar + 0.5;
|
|
}
|
|
}
|
|
}
|