summaryrefslogtreecommitdiff
path: root/libavfilter/libmpcodecs/vf_detc.c
diff options
context:
space:
mode:
Diffstat (limited to 'libavfilter/libmpcodecs/vf_detc.c')
-rw-r--r--libavfilter/libmpcodecs/vf_detc.c453
1 files changed, 453 insertions, 0 deletions
diff --git a/libavfilter/libmpcodecs/vf_detc.c b/libavfilter/libmpcodecs/vf_detc.c
new file mode 100644
index 0000000000..751e2b822b
--- /dev/null
+++ b/libavfilter/libmpcodecs/vf_detc.c
@@ -0,0 +1,453 @@
+/*
+ * 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 "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)
+{
+ ff_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;
+ ff_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)) {
+ ff_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)) {
+ //ff_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)) {
+ ff_mp_msg(MSGT_VFILTER, MSGL_V, "interlaced frame appears in duplicate!!!\n");
+ p->pm = pm; /* hack :) */
+ p->frame = 3;
+ return TC_IL1;
+ }
+ } else {
+ ff_mp_msg(MSGT_VFILTER, MSGL_V, "mismatched telecine fields!\n");
+ p->frame = -1;
+ }
+ }
+
+ if (2*m.even*m.temp < m.odd*m.noise) {
+ ff_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) {
+ ff_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])) {
+ ff_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) {
+ ff_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)) {
+ ff_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 *vf, mp_image_t *dmpi)
+{
+ struct vf_priv_s *p = vf->priv;
+ int dropflag;
+
+ switch (p->drop) {
+ default:
+ 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) {
+ ff_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 ff_vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
+}
+
+static int put_image(struct vf_instance *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 = ff_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 = ff_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 *vf, unsigned int fmt)
+{
+ /* FIXME - figure out which other formats work */
+ switch (fmt) {
+ case IMGFMT_YV12:
+ case IMGFMT_IYUV:
+ case IMGFMT_I420:
+ return ff_vf_next_query_format(vf, fmt);
+ }
+ return 0;
+}
+
+static int config(struct vf_instance *vf,
+ int width, int height, int d_width, int d_height,
+ unsigned int flags, unsigned int outfmt)
+{
+ return ff_vf_next_config(vf,width,height,d_width,d_height,flags,outfmt);
+}
+
+static void uninit(struct vf_instance *vf)
+{
+ free(vf->priv);
+}
+
+static struct {
+ const 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 vf_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;
+}
+
+const vf_info_t ff_vf_info_detc = {
+ "de-telecine filter",
+ "detc",
+ "Rich Felker",
+ "",
+ vf_open,
+ NULL
+};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 11:14:23 +0000