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mpv/video/filter/vf.c

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/*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <sys/types.h>
#include <libavutil/common.h>
#include <libavutil/mem.h>
#include "config.h"
#include "common/common.h"
#include "common/global.h"
#include "common/msg.h"
#include "options/m_option.h"
#include "options/m_config.h"
#include "options/options.h"
#include "video/img_format.h"
#include "video/mp_image.h"
#include "video/mp_image_pool.h"
#include "vf.h"
#include "video/memcpy_pic.h"
extern const vf_info_t vf_info_crop;
extern const vf_info_t vf_info_expand;
extern const vf_info_t vf_info_pp;
extern const vf_info_t vf_info_scale;
extern const vf_info_t vf_info_format;
extern const vf_info_t vf_info_noformat;
extern const vf_info_t vf_info_flip;
extern const vf_info_t vf_info_rotate;
extern const vf_info_t vf_info_mirror;
extern const vf_info_t vf_info_noise;
extern const vf_info_t vf_info_eq;
extern const vf_info_t vf_info_gradfun;
extern const vf_info_t vf_info_unsharp;
extern const vf_info_t vf_info_swapuv;
extern const vf_info_t vf_info_hqdn3d;
extern const vf_info_t vf_info_ilpack;
extern const vf_info_t vf_info_dsize;
extern const vf_info_t vf_info_softpulldown;
extern const vf_info_t vf_info_pullup;
extern const vf_info_t vf_info_delogo;
extern const vf_info_t vf_info_phase;
extern const vf_info_t vf_info_divtc;
extern const vf_info_t vf_info_screenshot;
extern const vf_info_t vf_info_sub;
extern const vf_info_t vf_info_yadif;
extern const vf_info_t vf_info_stereo3d;
extern const vf_info_t vf_info_dlopen;
extern const vf_info_t vf_info_lavfi;
extern const vf_info_t vf_info_vaapi;
extern const vf_info_t vf_info_vapoursynth;
extern const vf_info_t vf_info_vapoursynth_lazy;
extern const vf_info_t vf_info_vdpaupp;
extern const vf_info_t vf_info_buffer;
// list of available filters:
static const vf_info_t *const filter_list[] = {
&vf_info_crop,
&vf_info_expand,
&vf_info_scale,
&vf_info_format,
&vf_info_noformat,
&vf_info_flip,
&vf_info_rotate,
&vf_info_mirror,
#if HAVE_LIBPOSTPROC
&vf_info_pp,
#endif
#if HAVE_LIBAVFILTER
&vf_info_lavfi,
#endif
&vf_info_screenshot,
&vf_info_noise,
&vf_info_eq,
&vf_info_gradfun,
&vf_info_unsharp,
&vf_info_swapuv,
&vf_info_hqdn3d,
&vf_info_ilpack,
&vf_info_dsize,
&vf_info_softpulldown,
&vf_info_pullup,
&vf_info_delogo,
&vf_info_phase,
&vf_info_divtc,
&vf_info_sub,
&vf_info_yadif,
&vf_info_stereo3d,
&vf_info_buffer,
#if HAVE_DLOPEN
&vf_info_dlopen,
#endif
#if HAVE_VAPOURSYNTH_CORE && HAVE_VAPOURSYNTH
&vf_info_vapoursynth,
#endif
#if HAVE_VAPOURSYNTH_CORE && HAVE_VAPOURSYNTH_LAZY
&vf_info_vapoursynth_lazy,
#endif
#if HAVE_VAAPI_VPP
&vf_info_vaapi,
#endif
#if HAVE_VDPAU
&vf_info_vdpaupp,
#endif
NULL
};
static void vf_uninit_filter(vf_instance_t *vf);
static bool get_desc(struct m_obj_desc *dst, int index)
{
if (index >= MP_ARRAY_SIZE(filter_list) - 1)
return false;
const vf_info_t *vf = filter_list[index];
*dst = (struct m_obj_desc) {
.name = vf->name,
.description = vf->description,
.priv_size = vf->priv_size,
.priv_defaults = vf->priv_defaults,
.options = vf->options,
.p = vf,
.print_help = vf->print_help,
};
return true;
}
// For the vf option
const struct m_obj_list vf_obj_list = {
.get_desc = get_desc,
.description = "video filters",
};
// Try the cmd on each filter (starting with the first), and stop at the first
// filter which does not return CONTROL_UNKNOWN for it.
int vf_control_any(struct vf_chain *c, int cmd, void *arg)
{
for (struct vf_instance *cur = c->first; cur; cur = cur->next) {
if (cur->control) {
int r = cur->control(cur, cmd, arg);
if (r != CONTROL_UNKNOWN)
return r;
}
}
return CONTROL_UNKNOWN;
}
int vf_control_by_label(struct vf_chain *c,int cmd, void *arg, bstr label)
{
char *label_str = bstrdup0(NULL, label);
struct vf_instance *cur = vf_find_by_label(c, label_str);
talloc_free(label_str);
if (cur)
return cur->control(cur, cmd, arg);
else
return CONTROL_UNKNOWN;
}
static void vf_control_all(struct vf_chain *c, int cmd, void *arg)
{
for (struct vf_instance *cur = c->first; cur; cur = cur->next) {
if (cur->control)
cur->control(cur, cmd, arg);
}
}
static void vf_fix_img_params(struct mp_image *img, struct mp_image_params *p)
{
// Filters must absolutely set these correctly.
assert(img->w == p->w && img->h == p->h);
assert(img->imgfmt == p->imgfmt);
// Too many things don't set this correctly.
// If --colormatrix is used, decoder and filter chain disagree too.
// In general, it's probably more convenient to force these here,
// instead of requiring filters to set these correctly.
img->params = *p;
}
// Get a new image for filter output, with size and pixel format according to
// the last vf_config call.
struct mp_image *vf_alloc_out_image(struct vf_instance *vf)
{
struct mp_image_params *p = &vf->fmt_out;
assert(p->imgfmt);
struct mp_image *img = mp_image_pool_get(vf->out_pool, p->imgfmt, p->w, p->h);
if (img)
vf_fix_img_params(img, p);
return img;
}
// Returns false on failure; then the image can't be written to.
bool vf_make_out_image_writeable(struct vf_instance *vf, struct mp_image *img)
{
struct mp_image_params *p = &vf->fmt_out;
assert(p->imgfmt);
assert(p->imgfmt == img->imgfmt);
assert(p->w == img->w && p->h == img->h);
return mp_image_pool_make_writeable(vf->out_pool, img);
}
//============================================================================
// The default callback assumes all formats are passed through.
static int vf_default_query_format(struct vf_instance *vf, unsigned int fmt)
{
return vf_next_query_format(vf, fmt);
}
void vf_print_filter_chain(struct vf_chain *c, int msglevel,
struct vf_instance *vf)
{
if (!mp_msg_test(c->log, msglevel))
return;
char b[128] = {0};
mp_snprintf_cat(b, sizeof(b), "%s", mp_image_params_to_str(&c->input_params));
mp_msg(c->log, msglevel, " [vd] %s\n", b);
for (vf_instance_t *f = c->first; f; f = f->next) {
b[0] = '\0';
mp_snprintf_cat(b, sizeof(b), " [%s] ", f->info->name);
mp_snprintf_cat(b, sizeof(b), "%s", mp_image_params_to_str(&f->fmt_out));
if (f->autoinserted)
mp_snprintf_cat(b, sizeof(b), " [a]");
if (f == vf)
mp_snprintf_cat(b, sizeof(b), " <---");
mp_msg(c->log, msglevel, "%s\n", b);
}
}
static struct vf_instance *vf_open(struct vf_chain *c, const char *name,
char **args)
{
struct m_obj_desc desc;
if (!m_obj_list_find(&desc, &vf_obj_list, bstr0(name))) {
MP_ERR(c, "Couldn't find video filter '%s'.\n", name);
return NULL;
}
vf_instance_t *vf = talloc_zero(NULL, struct vf_instance);
*vf = (vf_instance_t) {
.info = desc.p,
.log = mp_log_new(vf, c->log, name),
.hwdec = c->hwdec,
.query_format = vf_default_query_format,
.out_pool = talloc_steal(vf, mp_image_pool_new(16)),
.chain = c,
};
struct m_config *config = m_config_from_obj_desc(vf, vf->log, &desc);
if (m_config_apply_defaults(config, name, c->opts->vf_defs) < 0)
goto error;
if (m_config_set_obj_params(config, args) < 0)
goto error;
vf->priv = config->optstruct;
int retcode = vf->info->open(vf);
if (retcode < 1)
goto error;
return vf;
error:
MP_ERR(c, "Creating filter '%s' failed.\n", name);
talloc_free(vf);
return NULL;
}
static vf_instance_t *vf_open_filter(struct vf_chain *c, const char *name,
char **args)
{
int i, l = 0;
for (i = 0; args && args[2 * i]; i++)
l += 1 + strlen(args[2 * i]) + 1 + strlen(args[2 * i + 1]);
l += strlen(name);
char str[l + 1];
char *p = str;
p += sprintf(str, "%s", name);
for (i = 0; args && args[2 * i]; i++)
p += sprintf(p, " %s=%s", args[2 * i], args[2 * i + 1]);
MP_INFO(c, "Opening video filter: [%s]\n", str);
return vf_open(c, name, args);
}
void vf_remove_filter(struct vf_chain *c, struct vf_instance *vf)
{
assert(vf != c->first && vf != c->last); // these are sentinels
struct vf_instance *prev = c->first;
while (prev && prev->next != vf)
prev = prev->next;
assert(prev); // not inserted
prev->next = vf->next;
vf_uninit_filter(vf);
}
struct vf_instance *vf_append_filter(struct vf_chain *c, const char *name,
char **args)
{
struct vf_instance *vf = vf_open_filter(c, name, args);
if (vf) {
// Insert it before the last filter, which is the "out" pseudo-filter
// (But after the "in" pseudo-filter)
struct vf_instance **pprev = &c->first->next;
while (*pprev && (*pprev)->next)
pprev = &(*pprev)->next;
vf->next = *pprev ? *pprev : NULL;
*pprev = vf;
}
return vf;
}
int vf_append_filter_list(struct vf_chain *c, struct m_obj_settings *list)
{
for (int n = 0; list && list[n].name; n++) {
struct vf_instance *vf =
vf_append_filter(c, list[n].name, list[n].attribs);
if (vf) {
if (list[n].label) {
vf->label = talloc_strdup(vf, list[n].label);
} else {
for (int i = 0; i < 100; i++) {
char* label = talloc_asprintf(vf, "%s.%02d", list[n].name, i);
if (vf_find_by_label(c, label)) {
talloc_free(label);
} else {
vf->label = label;
break;
}
}
}
}
}
return 0;
}
// Used by filters to add a filtered frame to the output queue.
// Ownership of img is transferred from caller to the filter chain.
void vf_add_output_frame(struct vf_instance *vf, struct mp_image *img)
{
if (img) {
vf_fix_img_params(img, &vf->fmt_out);
MP_TARRAY_APPEND(vf, vf->out_queued, vf->num_out_queued, img);
}
}
static bool vf_has_output_frame(struct vf_instance *vf)
{
if (!vf->num_out_queued && vf->filter_out) {
if (vf->filter_out(vf) < 0)
MP_ERR(vf, "Error filtering frame.\n");
}
return vf->num_out_queued > 0;
}
static struct mp_image *vf_dequeue_output_frame(struct vf_instance *vf)
{
struct mp_image *res = NULL;
if (vf_has_output_frame(vf)) {
res = vf->out_queued[0];
MP_TARRAY_REMOVE_AT(vf->out_queued, vf->num_out_queued, 0);
}
return res;
}
static int vf_do_filter(struct vf_instance *vf, struct mp_image *img)
{
assert(vf->fmt_in.imgfmt);
if (img)
assert(mp_image_params_equal(&img->params, &vf->fmt_in));
if (vf->filter_ext) {
int r = vf->filter_ext(vf, img);
if (r < 0)
MP_ERR(vf, "Error filtering frame.\n");
return r;
} else {
if (img) {
if (vf->filter)
img = vf->filter(vf, img);
vf_add_output_frame(vf, img);
}
return 0;
}
}
// Input a frame into the filter chain. Ownership of img is transferred.
// Return >= 0 on success, < 0 on failure (even if output frames were produced)
int vf_filter_frame(struct vf_chain *c, struct mp_image *img)
{
assert(img);
if (c->initialized < 1) {
talloc_free(img);
return -1;
}
assert(mp_image_params_equal(&img->params, &c->input_params));
vf_fix_img_params(img, &c->override_params);
return vf_do_filter(c->first, img);
}
// Output the next queued image (if any) from the full filter chain.
// The frame can be retrieved with vf_read_output_frame().
// eof: if set, assume there's no more input i.e. vf_filter_frame() will
// not be called (until reset) - flush all internally delayed frames
// returns: -1: error, 0: no output, 1: output available
int vf_output_frame(struct vf_chain *c, bool eof)
{
if (c->last->num_out_queued)
return 1;
if (c->initialized < 1)
return -1;
while (1) {
struct vf_instance *last = NULL;
for (struct vf_instance * cur = c->first; cur; cur = cur->next) {
// Flush remaining frames on EOF, but do that only if the previous
// filters have been flushed (i.e. they have no more output).
if (eof && !last) {
int r = vf_do_filter(cur, NULL);
if (r < 0)
return r;
}
if (vf_has_output_frame(cur))
last = cur;
}
if (!last)
return 0;
if (!last->next)
return 1;
int r = vf_do_filter(last->next, vf_dequeue_output_frame(last));
if (r < 0)
return r;
}
}
struct mp_image *vf_read_output_frame(struct vf_chain *c)
{
if (!c->last->num_out_queued)
vf_output_frame(c, false);
return vf_dequeue_output_frame(c->last);
}
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] = VFCAP_CSP_SUPPORTED;
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.\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;
}
}
}
void vf_detc_init_pts_buf(struct vf_detc_pts_buf *p)
{
p->inpts_prev = MP_NOPTS_VALUE;
p->outpts_prev = MP_NOPTS_VALUE;
p->lastdelta = 0;
}
static double vf_detc_adjust_pts_internal(struct vf_detc_pts_buf *p,
double pts, bool reset_pattern,
bool skip_frame, double delta,
double boundfactor_minus,
double increasefactor,
double boundfactor_plus)
{
double newpts;
if (pts == MP_NOPTS_VALUE)
return pts;
if (delta <= 0) {
if (p->inpts_prev == MP_NOPTS_VALUE)
delta = 0;
else if (pts == p->inpts_prev)
delta = p->lastdelta;
else
delta = pts - p->inpts_prev;
}
p->inpts_prev = pts;
p->lastdelta = delta;
if (skip_frame)
return MP_NOPTS_VALUE;
/* detect bogus deltas and then passthru pts (possibly caused by seeking,
* or bad input) */
if (p->outpts_prev == MP_NOPTS_VALUE || reset_pattern || delta <= 0.0 ||
delta >= 0.5)
newpts = pts;
else {
// turn 5 frames into 4
newpts = p->outpts_prev + delta * increasefactor;
// bound to input pts in a sensible way; these numbers come because we
// map frames the following way when ivtc'ing:
// 0/30 -> 0/24 diff=0
// 1/30 -> 1/24 diff=1/120
// 2/30 -> -
// 3/30 -> 2/24 diff=-1/60
// 4/30 -> 3/24 diff=-1/120
if (newpts < pts - delta * boundfactor_minus)
newpts = pts - delta * boundfactor_minus;
if (newpts > pts + delta * boundfactor_plus)
newpts = pts + delta * boundfactor_plus;
if (newpts < p->outpts_prev)
newpts = p->outpts_prev; // damage control
}
p->outpts_prev = newpts;
return newpts;
}
double vf_detc_adjust_pts(struct vf_detc_pts_buf *p, double pts,
bool reset_pattern, bool skip_frame)
{
// standard telecine (see above)
return vf_detc_adjust_pts_internal(p, pts, reset_pattern, skip_frame,
0, 0.5, 1.25, 0.25);
}
double vf_softpulldown_adjust_pts(struct vf_detc_pts_buf *p, double pts,
bool reset_pattern, bool skip_frame,
int last_frame_duration)
{
// for the softpulldown filter we get:
// 0/60 -> 0/30
// 2/60 -> 1/30
// 5/60 -> 2/30
// 7/60 -> 3/30, 4/30
return vf_detc_adjust_pts_internal(p, pts, reset_pattern, skip_frame,
0, 1.0 / last_frame_duration,
2.0 / last_frame_duration,
1.0 / last_frame_duration);
}
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