mirror of https://github.com/mpv-player/mpv
149 lines
4.2 KiB
C
149 lines
4.2 KiB
C
/*
|
|
* detect frames that are (almost) black
|
|
* search for black frames to detect scene transitions
|
|
* (c) 2006 Julian Hall
|
|
*
|
|
* based on code designed for skipping commercials
|
|
* (c) 2002-2003 Brian J. Murrell
|
|
*
|
|
* cleanup, simplify, speedup (c) 2006 by Ivo van Poorten
|
|
*
|
|
* 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"
|
|
|
|
struct vf_priv_s {
|
|
unsigned int bamount, bthresh, frame, lastkeyframe;
|
|
};
|
|
|
|
static int config(struct vf_instance *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 int query_format(struct vf_instance *vf, unsigned fmt) {
|
|
switch(fmt) {
|
|
case IMGFMT_YVU9:
|
|
case IMGFMT_IF09:
|
|
case IMGFMT_YV12:
|
|
case IMGFMT_I420:
|
|
case IMGFMT_IYUV:
|
|
case IMGFMT_CLPL:
|
|
case IMGFMT_Y800:
|
|
case IMGFMT_Y8:
|
|
case IMGFMT_NV12:
|
|
case IMGFMT_NV21:
|
|
case IMGFMT_444P:
|
|
case IMGFMT_422P:
|
|
case IMGFMT_411P:
|
|
case IMGFMT_HM12:
|
|
return vf_next_query_format(vf, fmt);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){
|
|
mp_image_t *dmpi;
|
|
int x, y;
|
|
int nblack=0, pblack=0;
|
|
unsigned char *yplane = mpi->planes[0];
|
|
unsigned int ystride = mpi->stride[0];
|
|
int pict_type = mpi->pict_type;
|
|
int w = mpi->w, h = mpi->h;
|
|
int bthresh = vf->priv->bthresh;
|
|
int bamount = vf->priv->bamount;
|
|
static const char *const picttypes[4] = { "unknown", "I", "P", "B" };
|
|
|
|
for (y=1; y<=h; y++) {
|
|
for (x=0; x<w; x++)
|
|
nblack += yplane[x] < bthresh;
|
|
pblack = nblack*100/(w*y);
|
|
if (pblack < bamount) break;
|
|
yplane += ystride;
|
|
}
|
|
|
|
if (pict_type > 3 || pict_type < 0) pict_type = 0;
|
|
if (pict_type == 1) vf->priv->lastkeyframe = vf->priv->frame;
|
|
|
|
if (pblack >= bamount)
|
|
mp_msg(MSGT_VFILTER, MSGL_INFO,"vf_blackframe: %u, %i%%, %s (I:%u)\n",
|
|
vf->priv->frame, pblack, picttypes[pict_type],
|
|
vf->priv->lastkeyframe);
|
|
|
|
vf->priv->frame++;
|
|
|
|
dmpi = vf_get_image(vf->next, mpi->imgfmt, MP_IMGTYPE_EXPORT, 0,
|
|
mpi->width, mpi->height);
|
|
dmpi->planes[0] = mpi->planes[0];
|
|
dmpi->stride[0] = mpi->stride[0];
|
|
dmpi->planes[1] = mpi->planes[1];
|
|
dmpi->stride[1] = mpi->stride[1];
|
|
dmpi->planes[2] = mpi->planes[2];
|
|
dmpi->stride[2] = mpi->stride[2];
|
|
|
|
vf_clone_mpi_attributes(dmpi, mpi);
|
|
|
|
return vf_next_put_image(vf, dmpi, pts);
|
|
}
|
|
|
|
static int control(struct vf_instance *vf, int request, void* data){
|
|
return vf_next_control(vf,request,data);
|
|
}
|
|
|
|
static void uninit(struct vf_instance *vf) {
|
|
free(vf->priv);
|
|
}
|
|
|
|
static int vf_open(vf_instance_t *vf, char *args){
|
|
vf->priv = malloc(sizeof(struct vf_priv_s));
|
|
if (!vf->priv) return 0;
|
|
|
|
vf->config = config;
|
|
vf->put_image = put_image;
|
|
vf->control = control;
|
|
vf->uninit = uninit;
|
|
vf->query_format = query_format;
|
|
|
|
vf->priv->bamount = 98;
|
|
vf->priv->bthresh = 0x20;
|
|
vf->priv->frame = 0;
|
|
vf->priv->lastkeyframe = 0;
|
|
|
|
if (args)
|
|
sscanf(args, "%u:%u", &vf->priv->bamount, &vf->priv->bthresh);
|
|
return 1;
|
|
}
|
|
|
|
const vf_info_t vf_info_blackframe = {
|
|
"detects black frames",
|
|
"blackframe",
|
|
"Brian J. Murrell, Julian Hall, Ivo van Poorten",
|
|
"Useful for detecting scene transitions",
|
|
vf_open,
|
|
NULL
|
|
};
|