mpv/libmpcodecs/vf_detc.c

438 lines
11 KiB
C

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "config.h"
#include "mp_msg.h"
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "libvo/fastmemcpy.h"
struct metrics {
int even;
int odd;
int noise;
int temp;
};
struct vf_priv_s {
int frame;
int drop, lastdrop;
struct metrics pm;
int thres[5];
int inframes, outframes;
int mode;
int (*analyze)(struct vf_priv_s *, mp_image_t *, mp_image_t *);
int needread;
};
#define COMPE(a,b,e) (abs((a)-(b)) < (((a)+(b))>>(e)))
#define COMPARABLE(a,b) COMPE((a),(b),2)
#define VERYCLOSE(a,b) COMPE((a),(b),3)
#define OUTER_TC_NBHD(s) ( \
COMPARABLE((s)[-1].m.even,(s)[-1].m.odd) && \
COMPARABLE((s)[1].m.even,(s)[0].m.odd) && \
COMPARABLE((s)[2].m.even,(s)[1].m.odd) && \
COMPARABLE((s)[-1].m.noise,(s)[0].m.temp) && \
COMPARABLE((s)[2].m.noise,(s)[2].m.temp) )
#define INNER_TC_NBHD(s,l,h) ( \
COMPARABLE((s)[0].m.even,(l)) && \
COMPARABLE((s)[2].m.odd,(l)) && ( \
COMPARABLE((s)[0].m.noise,(h)) || \
COMPARABLE((s)[1].m.noise,(h)) ) )
enum {
TC_DROP,
TC_PROG,
TC_IL1,
TC_IL2
};
static void block_diffs(struct metrics *m, unsigned char *old, unsigned char *new, int os, int ns)
{
int x, y, even=0, odd=0, noise, temp;
unsigned char *oldp, *newp;
m->noise = m->temp = 0;
for (x = 8; x; x--) {
oldp = old++;
newp = new++;
noise = temp = 0;
for (y = 4; y; y--) {
even += abs(newp[0]-oldp[0]);
odd += abs(newp[ns]-oldp[os]);
noise += newp[ns]-newp[0];
temp += oldp[os]-newp[0];
oldp += os<<1;
newp += ns<<1;
}
m->noise += abs(noise);
m->temp += abs(temp);
}
m->even = even;
m->odd = odd;
}
static void diff_planes(struct metrics *m, unsigned char *old, unsigned char *new, int w, int h, int os, int ns)
{
int x, y, me=0, mo=0, mn=0, mt=0;
struct metrics l;
for (y = 0; y < h-7; y += 8) {
for (x = 0; x < w-7; x += 8) {
block_diffs(&l, old+x+y*os, new+x+y*ns, os, ns);
if (l.even > me) me = l.even;
if (l.odd > mo) mo = l.odd;
if (l.noise > mn) mn = l.noise;
if (l.temp > mt) mt = l.temp;
}
}
m->even = me;
m->odd = mo;
m->noise = mn;
m->temp = mt;
}
static void diff_fields(struct metrics *metr, mp_image_t *old, mp_image_t *new)
{
struct metrics m, mu, mv;
diff_planes(&m, old->planes[0], new->planes[0],
new->w, new->h, old->stride[0], new->stride[0]);
if (new->flags & MP_IMGFLAG_PLANAR) {
diff_planes(&mu, old->planes[1], new->planes[1],
new->chroma_width, new->chroma_height,
old->stride[1], new->stride[1]);
diff_planes(&mv, old->planes[2], new->planes[2],
new->chroma_width, new->chroma_height,
old->stride[2], new->stride[2]);
if (mu.even > m.even) m.even = mu.even;
if (mu.odd > m.odd) m.odd = mu.odd;
if (mu.noise > m.noise) m.noise = mu.noise;
if (mu.temp > m.temp) m.temp = mu.temp;
if (mv.even > m.even) m.even = mv.even;
if (mv.odd > m.odd) m.odd = mv.odd;
if (mv.noise > m.noise) m.noise = mv.noise;
if (mv.temp > m.temp) m.temp = mv.temp;
}
*metr = m;
}
static void status(int f, struct metrics *m)
{
mp_msg(MSGT_VFILTER, MSGL_V, "frame %d: e=%d o=%d n=%d t=%d\n",
f, m->even, m->odd, m->noise, m->temp);
}
static int analyze_fixed_pattern(struct vf_priv_s *p, mp_image_t *new, mp_image_t *old)
{
if (p->frame >= 0) p->frame = (p->frame+1)%5;
mp_msg(MSGT_VFILTER, MSGL_V, "frame %d\n", p->frame);
switch (p->frame) {
case -1: case 0: case 1: case 2:
return TC_PROG;
case 3:
return TC_IL1;
case 4:
return TC_IL2;
}
return 0;
}
static int analyze_aggressive(struct vf_priv_s *p, mp_image_t *new, mp_image_t *old)
{
struct metrics m, pm;
if (p->frame >= 0) p->frame = (p->frame+1)%5;
diff_fields(&m, old, new);
status(p->frame, &m);
pm = p->pm;
p->pm = m;
if (p->frame == 4) {
/* We need to break at scene changes, but is this a valid test? */
if ((m.even > p->thres[2]) && (m.odd > p->thres[2]) && (m.temp > p->thres[3])
&& (m.temp > 5*pm.temp) && (m.temp*2 > m.noise)) {
mp_msg(MSGT_VFILTER, MSGL_V, "scene change breaking telecine!\n");
p->frame = -1;
return TC_DROP;
}
/* Thres. is to compensate for quantization errors when noise is low */
if (m.noise - m.temp > -p->thres[4]) {
if (COMPARABLE(m.even, pm.odd)) {
//mp_msg(MSGT_VFILTER, MSGL_V, "confirmed field match!\n");
return TC_IL2;
} else if ((m.even < p->thres[0]) && (m.odd < p->thres[0]) && VERYCLOSE(m.even, m.odd)
&& VERYCLOSE(m.noise,m.temp) && VERYCLOSE(m.noise,pm.noise)) {
mp_msg(MSGT_VFILTER, MSGL_V, "interlaced frame appears in duplicate!!!\n");
p->pm = pm; /* hack :) */
p->frame = 3;
return TC_IL1;
}
} else {
mp_msg(MSGT_VFILTER, MSGL_V, "mismatched telecine fields!\n");
p->frame = -1;
}
}
if (2*m.even*m.temp < m.odd*m.noise) {
mp_msg(MSGT_VFILTER, MSGL_V, "caught telecine sync!\n");
p->frame = 3;
return TC_IL1;
}
if (p->frame < 3) {
if (m.noise > p->thres[3]) {
if (m.noise > 2*m.temp) {
mp_msg(MSGT_VFILTER, MSGL_V, "merging fields out of sequence!\n");
return TC_IL2;
}
if ((m.noise > 2*pm.noise) && (m.even > p->thres[2]) && (m.odd > p->thres[2])) {
mp_msg(MSGT_VFILTER, MSGL_V, "dropping horrible interlaced frame!\n");
return TC_DROP;
}
}
}
switch (p->frame) {
case -1:
if (4*m.noise > 5*m.temp) {
mp_msg(MSGT_VFILTER, MSGL_V, "merging fields out of sequence!\n");
return TC_IL2;
}
case 0:
case 1:
case 2:
return TC_PROG;
case 3:
if ((m.even > p->thres[1]) && (m.even > m.odd) && (m.temp > m.noise)) {
mp_msg(MSGT_VFILTER, MSGL_V, "lost telecine tracking!\n");
p->frame = -1;
return TC_PROG;
}
return TC_IL1;
case 4:
return TC_IL2;
}
return 0;
}
static void copy_image(mp_image_t *dmpi, mp_image_t *mpi, int field)
{
switch (field) {
case 0:
my_memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h/2,
dmpi->stride[0]*2, mpi->stride[0]*2);
if (mpi->flags & MP_IMGFLAG_PLANAR) {
my_memcpy_pic(dmpi->planes[1], mpi->planes[1],
mpi->chroma_width, mpi->chroma_height/2,
dmpi->stride[1]*2, mpi->stride[1]*2);
my_memcpy_pic(dmpi->planes[2], mpi->planes[2],
mpi->chroma_width, mpi->chroma_height/2,
dmpi->stride[2]*2, mpi->stride[2]*2);
}
break;
case 1:
my_memcpy_pic(dmpi->planes[0]+dmpi->stride[0],
mpi->planes[0]+mpi->stride[0], mpi->w, mpi->h/2,
dmpi->stride[0]*2, mpi->stride[0]*2);
if (mpi->flags & MP_IMGFLAG_PLANAR) {
my_memcpy_pic(dmpi->planes[1]+dmpi->stride[1],
mpi->planes[1]+mpi->stride[1],
mpi->chroma_width, mpi->chroma_height/2,
dmpi->stride[1]*2, mpi->stride[1]*2);
my_memcpy_pic(dmpi->planes[2]+dmpi->stride[2],
mpi->planes[2]+mpi->stride[2],
mpi->chroma_width, mpi->chroma_height/2,
dmpi->stride[2]*2, mpi->stride[2]*2);
}
break;
case 2:
memcpy_pic(dmpi->planes[0], mpi->planes[0], mpi->w, mpi->h,
dmpi->stride[0], mpi->stride[0]);
if (mpi->flags & MP_IMGFLAG_PLANAR) {
memcpy_pic(dmpi->planes[1], mpi->planes[1],
mpi->chroma_width, mpi->chroma_height,
dmpi->stride[1], mpi->stride[1]);
memcpy_pic(dmpi->planes[2], mpi->planes[2],
mpi->chroma_width, mpi->chroma_height,
dmpi->stride[2], mpi->stride[2]);
}
break;
}
}
static int do_put_image(struct vf_instance_s* vf, mp_image_t *dmpi)
{
struct vf_priv_s *p = vf->priv;
int dropflag;
switch (p->drop) {
case 0:
dropflag = 0;
break;
case 1:
dropflag = (++p->lastdrop >= 5);
break;
case 2:
dropflag = (++p->lastdrop >= 5) && (4*p->inframes <= 5*p->outframes);
break;
}
if (dropflag) {
mp_msg(MSGT_VFILTER, MSGL_V, "drop! [%d/%d=%g]\n",
p->outframes, p->inframes, (float)p->outframes/p->inframes);
p->lastdrop = 0;
return 0;
}
p->outframes++;
return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
}
static int put_image(struct vf_instance_s* vf, mp_image_t *mpi, double pts)
{
int ret=0;
mp_image_t *dmpi;
struct vf_priv_s *p = vf->priv;
p->inframes++;
if (p->needread) dmpi = vf_get_image(vf->next, mpi->imgfmt,
MP_IMGTYPE_STATIC, MP_IMGFLAG_ACCEPT_STRIDE |
MP_IMGFLAG_PRESERVE | MP_IMGFLAG_READABLE,
mpi->width, mpi->height);
/* FIXME: is there a good way to get rid of static type? */
else dmpi = vf_get_image(vf->next, mpi->imgfmt,
MP_IMGTYPE_STATIC, MP_IMGFLAG_ACCEPT_STRIDE |
MP_IMGFLAG_PRESERVE, mpi->width, mpi->height);
switch (p->analyze(p, mpi, dmpi)) {
case TC_DROP:
/* Don't copy anything unless we'll need to read it. */
if (p->needread) copy_image(dmpi, mpi, 2);
p->lastdrop = 0;
break;
case TC_PROG:
/* Copy and display the whole frame. */
copy_image(dmpi, mpi, 2);
ret = do_put_image(vf, dmpi);
break;
case TC_IL1:
/* Only copy bottom field unless we need to read. */
if (p->needread) copy_image(dmpi, mpi, 2);
else copy_image(dmpi, mpi, 1);
p->lastdrop = 0;
break;
case TC_IL2:
/* Copy top field and show frame, then copy bottom if needed. */
copy_image(dmpi, mpi, 0);
ret = do_put_image(vf, dmpi);
if (p->needread) copy_image(dmpi, mpi, 1);
break;
}
return ret;
}
static int query_format(struct vf_instance_s* vf, unsigned int fmt)
{
/* FIXME - figure out which other formats work */
switch (fmt) {
case IMGFMT_YV12:
case IMGFMT_IYUV:
case IMGFMT_I420:
return vf_next_query_format(vf, fmt);
}
return 0;
}
static int config(struct vf_instance_s* vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int outfmt)
{
return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
}
static void uninit(struct vf_instance_s* vf)
{
free(vf->priv);
}
static struct {
char *name;
int (*func)(struct vf_priv_s *p, mp_image_t *new, mp_image_t *old);
int needread;
} anal_funcs[] = {
{ "fixed", analyze_fixed_pattern, 0 },
{ "aggressive", analyze_aggressive, 1 },
{ NULL, NULL, 0 }
};
#define STARTVARS if (0)
#define GETVAR(str, name, out, func) \
else if (!strncmp((str), name "=", sizeof(name))) \
(out) = (func)((str) + sizeof(name))
static void parse_var(struct vf_priv_s *p, char *var)
{
STARTVARS;
GETVAR(var, "dr", p->drop, atoi);
GETVAR(var, "t0", p->thres[0], atoi);
GETVAR(var, "t1", p->thres[1], atoi);
GETVAR(var, "t2", p->thres[2], atoi);
GETVAR(var, "t3", p->thres[3], atoi);
GETVAR(var, "t4", p->thres[4], atoi);
GETVAR(var, "fr", p->frame, atoi);
GETVAR(var, "am", p->mode, atoi);
}
static void parse_args(struct vf_priv_s *p, char *args)
{
char *next, *orig;
for (args=orig=strdup(args); args; args=next) {
next = strchr(args, ':');
if (next) *next++ = 0;
parse_var(p, args);
}
free(orig);
}
static int open(vf_instance_t *vf, char* args)
{
struct vf_priv_s *p;
vf->config = config;
vf->put_image = put_image;
vf->query_format = query_format;
vf->uninit = uninit;
vf->default_reqs = VFCAP_ACCEPT_STRIDE;
vf->priv = p = calloc(1, sizeof(struct vf_priv_s));
p->frame = -1;
p->thres[0] = 440;
p->thres[1] = 720;
p->thres[2] = 2500;
p->thres[3] = 2500;
p->thres[4] = 800;
p->drop = 0;
p->mode = 1;
if (args) parse_args(p, args);
p->analyze = anal_funcs[p->mode].func;
p->needread = anal_funcs[p->mode].needread;
return 1;
}
vf_info_t vf_info_detc = {
"de-telecine filter",
"detc",
"Rich Felker",
"",
open,
NULL
};