blackframe is integrated as a native filter.
Showing the changes to libavfilter/libmpcodecs (1 of 5 files). Show all
Unified · Split
| @@ -1,148 +0,0 @@ | ||
| 1 | −/* | |
| 2 | − * detect frames that are (almost) black | |
| 3 | − * search for black frames to detect scene transitions | |
| 4 | − * (c) 2006 Julian Hall | |
| 5 | − * | |
| 6 | − * based on code designed for skipping commercials | |
| 7 | − * (c) 2002-2003 Brian J. Murrell | |
| 8 | − * | |
| 9 | − * cleanup, simplify, speedup (c) 2006 by Ivo van Poorten | |
| 10 | − * | |
| 11 | − * This file is part of MPlayer. | |
| 12 | − * | |
| 13 | − * MPlayer is free software; you can redistribute it and/or modify | |
| 14 | − * it under the terms of the GNU General Public License as published by | |
| 15 | − * the Free Software Foundation; either version 2 of the License, or | |
| 16 | − * (at your option) any later version. | |
| 17 | − * | |
| 18 | − * MPlayer is distributed in the hope that it will be useful, | |
| 19 | − * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 20 | − * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 21 | − * GNU General Public License for more details. | |
| 22 | − * | |
| 23 | − * You should have received a copy of the GNU General Public License along | |
| 24 | − * with MPlayer; if not, write to the Free Software Foundation, Inc., | |
| 25 | − * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 26 | − */ | |
| 27 | − | |
| 28 | −#include <stdio.h> | |
| 29 | −#include <stdlib.h> | |
| 30 | −#include <string.h> | |
| 31 | − | |
| 32 | −#include "config.h" | |
| 33 | −#include "mp_msg.h" | |
| 34 | − | |
| 35 | −#include "img_format.h" | |
| 36 | −#include "mp_image.h" | |
| 37 | −#include "vf.h" | |
| 38 | − | |
| 39 | −struct vf_priv_s { | |
| 40 | − unsigned int bamount, bthresh, frame, lastkeyframe; | |
| 41 | −}; | |
| 42 | − | |
| 43 | −static int config(struct vf_instance *vf, int width, int height, int d_width, | |
| 44 | − int d_height, unsigned int flags, unsigned int outfmt) { | |
| 45 | − return vf_next_config(vf,width,height,d_width,d_height,flags,outfmt); | |
| 46 | −} | |
| 47 | − | |
| 48 | −static int query_format(struct vf_instance *vf, unsigned fmt) { | |
| 49 | − switch(fmt) { | |
| 50 | − case IMGFMT_YVU9: | |
| 51 | − case IMGFMT_IF09: | |
| 52 | − case IMGFMT_YV12: | |
| 53 | − case IMGFMT_I420: | |
| 54 | − case IMGFMT_IYUV: | |
| 55 | − case IMGFMT_CLPL: | |
| 56 | − case IMGFMT_Y800: | |
| 57 | − case IMGFMT_Y8: | |
| 58 | − case IMGFMT_NV12: | |
| 59 | − case IMGFMT_NV21: | |
| 60 | − case IMGFMT_444P: | |
| 61 | − case IMGFMT_422P: | |
| 62 | − case IMGFMT_411P: | |
| 63 | − case IMGFMT_HM12: | |
| 64 | − return vf_next_query_format(vf, fmt); | |
| 65 | − } | |
| 66 | − return 0; | |
| 67 | −} | |
| 68 | − | |
| 69 | −static int put_image(struct vf_instance *vf, mp_image_t *mpi, double pts){ | |
| 70 | − mp_image_t *dmpi; | |
| 71 | − int x, y; | |
| 72 | − int nblack=0, pblack=0; | |
| 73 | − unsigned char *yplane = mpi->planes[0]; | |
| 74 | − unsigned int ystride = mpi->stride[0]; | |
| 75 | − int pict_type = mpi->pict_type; | |
| 76 | − int w = mpi->w, h = mpi->h; | |
| 77 | − int bthresh = vf->priv->bthresh; | |
| 78 | − int bamount = vf->priv->bamount; | |
| 79 | − static const char *const picttypes[4] = { "unknown", "I", "P", "B" }; | |
| 80 | − | |
| 81 | − for (y=1; y<=h; y++) { | |
| 82 | − for (x=0; x<w; x++) | |
| 83 | − nblack += yplane[x] < bthresh; | |
| 84 | − pblack = nblack*100/(w*y); | |
| 85 | − if (pblack < bamount) break; | |
| 86 | − yplane += ystride; | |
| 87 | − } | |
| 88 | − | |
| 89 | − if (pict_type > 3 || pict_type < 0) pict_type = 0; | |
| 90 | − if (pict_type == 1) vf->priv->lastkeyframe = vf->priv->frame; | |
| 91 | − | |
| 92 | − if (pblack >= bamount) | |
| 93 | − mp_msg(MSGT_VFILTER, MSGL_INFO,"vf_blackframe: %u, %i%%, %s (I:%u)\n", | |
| 94 | − vf->priv->frame, pblack, picttypes[pict_type], | |
| 95 | − vf->priv->lastkeyframe); | |
| 96 | − | |
| 97 | − vf->priv->frame++; | |
| 98 | − | |
| 99 | − dmpi = vf_get_image(vf->next, mpi->imgfmt, MP_IMGTYPE_EXPORT, 0, | |
| 100 | − mpi->width, mpi->height); | |
| 101 | − dmpi->planes[0] = mpi->planes[0]; | |
| 102 | − dmpi->stride[0] = mpi->stride[0]; | |
| 103 | − dmpi->planes[1] = mpi->planes[1]; | |
| 104 | − dmpi->stride[1] = mpi->stride[1]; | |
| 105 | − dmpi->planes[2] = mpi->planes[2]; | |
| 106 | − dmpi->stride[2] = mpi->stride[2]; | |
| 107 | − | |
| 108 | − vf_clone_mpi_attributes(dmpi, mpi); | |
| 109 | − | |
| 110 | − return vf_next_put_image(vf, dmpi, pts); | |
| 111 | −} | |
| 112 | − | |
| 113 | −static int control(struct vf_instance *vf, int request, void* data){ | |
| 114 | − return vf_next_control(vf,request,data); | |
| 115 | −} | |
| 116 | − | |
| 117 | −static void uninit(struct vf_instance *vf) { | |
| 118 | − free(vf->priv); | |
| 119 | −} | |
| 120 | − | |
| 121 | −static int vf_open(vf_instance_t *vf, char *args){ | |
| 122 | − vf->priv = malloc(sizeof(struct vf_priv_s)); | |
| 123 | − if (!vf->priv) return 0; | |
| 124 | − | |
| 125 | − vf->config = config; | |
| 126 | − vf->put_image = put_image; | |
| 127 | − vf->control = control; | |
| 128 | − vf->uninit = uninit; | |
| 129 | − vf->query_format = query_format; | |
| 130 | − | |
| 131 | − vf->priv->bamount = 98; | |
| 132 | − vf->priv->bthresh = 0x20; | |
| 133 | − vf->priv->frame = 0; | |
| 134 | − vf->priv->lastkeyframe = 0; | |
| 135 | − | |
| 136 | − if (args) | |
| 137 | − sscanf(args, "%u:%u", &vf->priv->bamount, &vf->priv->bthresh); | |
| 138 | − return 1; | |
| 139 | −} | |
| 140 | − | |
| 141 | −const vf_info_t vf_info_blackframe = { | |
| 142 | − "detects black frames", | |
| 143 | − "blackframe", | |
| 144 | − "Brian J. Murrell, Julian Hall, Ivo van Poorten", | |
| 145 | − "Useful for detecting scene transitions", | |
| 146 | − vf_open, | |
| 147 | − NULL | |
| 148 | −}; | |