mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
19ffa2ff2d
A filter needs formats.h iff it uses FILTER_QUERY_FUNC(); since lots of filters have been switched to use something else than FILTER_QUERY_FUNC, they don't need it any more, but removing this header has been forgotten. This commit does this; files with formats.h inclusion went down from 304 to 139 here (it were 449 before the preceding commit). While just at it, also improve the other headers a bit. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
127 lines
4.4 KiB
C
127 lines
4.4 KiB
C
/*
|
|
* Copyright (c) 2010 Stefano Sabatini
|
|
* Copyright (c) 2006 Ivo van Poorten
|
|
* Copyright (c) 2006 Julian Hall
|
|
* Copyright (c) 2002-2003 Brian J. Murrell
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg 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.
|
|
*
|
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Search for black frames to detect scene transitions.
|
|
* Ported from MPlayer libmpcodecs/vf_blackframe.c.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <inttypes.h>
|
|
|
|
#include "libavutil/internal.h"
|
|
#include "libavutil/opt.h"
|
|
#include "avfilter.h"
|
|
#include "internal.h"
|
|
#include "video.h"
|
|
|
|
typedef struct BlackFrameContext {
|
|
const AVClass *class;
|
|
int bamount; ///< black amount
|
|
int bthresh; ///< black threshold
|
|
unsigned int frame; ///< frame number
|
|
unsigned int nblack; ///< number of black pixels counted so far
|
|
unsigned int last_keyframe; ///< frame number of the last received key-frame
|
|
} BlackFrameContext;
|
|
|
|
static const enum AVPixelFormat pix_fmts[] = {
|
|
AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NV12,
|
|
AV_PIX_FMT_NV21, AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV411P,
|
|
AV_PIX_FMT_NONE
|
|
};
|
|
|
|
#define SET_META(key, format, value) \
|
|
snprintf(buf, sizeof(buf), format, value); \
|
|
av_dict_set(metadata, key, buf, 0)
|
|
|
|
static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
|
|
{
|
|
AVFilterContext *ctx = inlink->dst;
|
|
BlackFrameContext *s = ctx->priv;
|
|
int x, i;
|
|
int pblack = 0;
|
|
uint8_t *p = frame->data[0];
|
|
AVDictionary **metadata;
|
|
char buf[32];
|
|
|
|
for (i = 0; i < frame->height; i++) {
|
|
for (x = 0; x < inlink->w; x++)
|
|
s->nblack += p[x] < s->bthresh;
|
|
p += frame->linesize[0];
|
|
}
|
|
|
|
if (frame->flags & AV_FRAME_FLAG_KEY)
|
|
s->last_keyframe = s->frame;
|
|
|
|
pblack = s->nblack * 100 / (inlink->w * inlink->h);
|
|
if (pblack >= s->bamount) {
|
|
metadata = &frame->metadata;
|
|
|
|
av_log(ctx, AV_LOG_INFO, "frame:%u pblack:%u pts:%"PRId64" t:%f "
|
|
"type:%c last_keyframe:%d\n",
|
|
s->frame, pblack, frame->pts,
|
|
frame->pts == AV_NOPTS_VALUE ? -1 : frame->pts * av_q2d(inlink->time_base),
|
|
av_get_picture_type_char(frame->pict_type), s->last_keyframe);
|
|
|
|
SET_META("lavfi.blackframe.pblack", "%u", pblack);
|
|
}
|
|
|
|
s->frame++;
|
|
s->nblack = 0;
|
|
return ff_filter_frame(inlink->dst->outputs[0], frame);
|
|
}
|
|
|
|
#define OFFSET(x) offsetof(BlackFrameContext, x)
|
|
#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
|
|
static const AVOption blackframe_options[] = {
|
|
{ "amount", "percentage of the pixels that have to be below the threshold "
|
|
"for the frame to be considered black", OFFSET(bamount), AV_OPT_TYPE_INT, { .i64 = 98 }, 0, 100, FLAGS },
|
|
{ "threshold", "threshold below which a pixel value is considered black",
|
|
OFFSET(bthresh), AV_OPT_TYPE_INT, { .i64 = 32 }, 0, 255, FLAGS },
|
|
{ "thresh", "threshold below which a pixel value is considered black",
|
|
OFFSET(bthresh), AV_OPT_TYPE_INT, { .i64 = 32 }, 0, 255, FLAGS },
|
|
{ NULL }
|
|
};
|
|
|
|
AVFILTER_DEFINE_CLASS(blackframe);
|
|
|
|
static const AVFilterPad avfilter_vf_blackframe_inputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_VIDEO,
|
|
.filter_frame = filter_frame,
|
|
},
|
|
};
|
|
|
|
const AVFilter ff_vf_blackframe = {
|
|
.name = "blackframe",
|
|
.description = NULL_IF_CONFIG_SMALL("Detect frames that are (almost) black."),
|
|
.priv_size = sizeof(BlackFrameContext),
|
|
.priv_class = &blackframe_class,
|
|
.flags = AVFILTER_FLAG_METADATA_ONLY,
|
|
FILTER_INPUTS(avfilter_vf_blackframe_inputs),
|
|
FILTER_OUTPUTS(ff_video_default_filterpad),
|
|
FILTER_PIXFMTS_ARRAY(pix_fmts),
|
|
};
|