mirror of https://github.com/FFmpeg/FFmpeg.git
Signed-off-by: Mark Heath <silicontrip@gmail.com> Signed-off-by: Dave Rice <dave@dericed.com> Signed-off-by: Clément Bœsch <u@pkh.me>pull/76/merge
Clément Bœsch
11 years ago
parent
881ee369e6
commit
76bce46d8f
6 changed files with 648 additions and 1 deletions
@ -0,0 +1,478 @@ |
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/*
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* Copyright (c) 2010 Mark Heath mjpeg0 @ silicontrip dot org |
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* Copyright (c) 2014 Clément Bœsch |
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* Copyright (c) 2014 Dave Rice @dericed |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "internal.h" |
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enum FilterMode { |
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FILTER_NONE = -1, |
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FILTER_TOUT, |
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FILTER_VREP, |
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FILTER_BRNG, |
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FILT_NUMB |
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}; |
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typedef struct { |
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const AVClass *class; |
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int chromah; // height of chroma plane
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int chromaw; // width of chroma plane
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int hsub; // horizontal subsampling
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int vsub; // vertical subsampling
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int fs; // pixel count per frame
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int cfs; // pixel count per frame of chroma planes
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enum FilterMode outfilter; |
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int filters; |
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AVFrame *frame_prev; |
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char *vrep_line; |
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uint8_t rgba_color[4]; |
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int yuv_color[3]; |
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} SignalstatsContext; |
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#define OFFSET(x) offsetof(SignalstatsContext, x) |
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
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static const AVOption signalstats_options[] = { |
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{"stat", "set statistics filters", OFFSET(filters), AV_OPT_TYPE_FLAGS, {.i64=0}, 0, INT_MAX, FLAGS, "filters"}, |
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{"tout", "analyze pixels for temporal outliers", 0, AV_OPT_TYPE_CONST, {.i64=1<<FILTER_TOUT}, 0, 0, FLAGS, "filters"}, |
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{"vrep", "analyze video lines for vertical line repitition", 0, AV_OPT_TYPE_CONST, {.i64=1<<FILTER_VREP}, 0, 0, FLAGS, "filters"}, |
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{"brng", "analyze for pixels outside of broadcast range", 0, AV_OPT_TYPE_CONST, {.i64=1<<FILTER_BRNG}, 0, 0, FLAGS, "filters"}, |
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{"out", "set video filter", OFFSET(outfilter), AV_OPT_TYPE_INT, {.i64=FILTER_NONE}, -1, FILT_NUMB-1, FLAGS, "out"}, |
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{"tout", "highlight pixels that depict temporal outliers", 0, AV_OPT_TYPE_CONST, {.i64=FILTER_TOUT}, 0, 0, FLAGS, "out"}, |
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{"vrep", "highlight video lines that depict vertical line repitition", 0, AV_OPT_TYPE_CONST, {.i64=FILTER_VREP}, 0, 0, FLAGS, "out"}, |
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{"brng", "highlight pixels that are outside of broadcast range", 0, AV_OPT_TYPE_CONST, {.i64=FILTER_BRNG}, 0, 0, FLAGS, "out"}, |
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{"c", "set highlight color", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str="yellow"}, .flags=FLAGS}, |
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{"color", "set highlight color", OFFSET(rgba_color), AV_OPT_TYPE_COLOR, {.str="yellow"}, .flags=FLAGS}, |
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{NULL} |
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}; |
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AVFILTER_DEFINE_CLASS(signalstats); |
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static av_cold int init(AVFilterContext *ctx) |
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{ |
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uint8_t r, g, b; |
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SignalstatsContext *s = ctx->priv; |
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if (s->outfilter != FILTER_NONE) |
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s->filters |= 1 << s->outfilter; |
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r = s->rgba_color[0]; |
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g = s->rgba_color[1]; |
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b = s->rgba_color[2]; |
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s->yuv_color[0] = (( 66*r + 129*g + 25*b + (1<<7)) >> 8) + 16; |
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s->yuv_color[1] = ((-38*r + -74*g + 112*b + (1<<7)) >> 8) + 128; |
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s->yuv_color[2] = ((112*r + -94*g + -18*b + (1<<7)) >> 8) + 128; |
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return 0; |
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} |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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SignalstatsContext *s = ctx->priv; |
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av_frame_free(&s->frame_prev); |
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av_freep(&s->vrep_line); |
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} |
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static int query_formats(AVFilterContext *ctx) |
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{ |
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// TODO: add more
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enum AVPixelFormat pix_fmts[] = { |
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AV_PIX_FMT_YUV444P, AV_PIX_FMT_YUV422P, AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV411P, |
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AV_PIX_FMT_NONE |
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}; |
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ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); |
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return 0; |
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} |
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static int config_props(AVFilterLink *outlink) |
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{ |
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AVFilterContext *ctx = outlink->src; |
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SignalstatsContext *s = ctx->priv; |
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AVFilterLink *inlink = outlink->src->inputs[0]; |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(outlink->format); |
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s->hsub = desc->log2_chroma_w; |
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s->vsub = desc->log2_chroma_h; |
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outlink->w = inlink->w; |
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outlink->h = inlink->h; |
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s->chromaw = FF_CEIL_RSHIFT(inlink->w, s->hsub); |
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s->chromah = FF_CEIL_RSHIFT(inlink->h, s->vsub); |
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s->fs = inlink->w * inlink->h; |
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s->cfs = s->chromaw * s->chromah; |
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if (s->filters & 1<<FILTER_VREP) { |
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s->vrep_line = av_malloc(inlink->h * sizeof(*s->vrep_line)); |
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if (!s->vrep_line) |
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return AVERROR(ENOMEM); |
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} |
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return 0; |
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} |
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static void burn_frame(SignalstatsContext *s, AVFrame *f, int x, int y) |
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{ |
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const int chromax = x >> s->hsub; |
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const int chromay = y >> s->vsub; |
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f->data[0][y * f->linesize[0] + x] = s->yuv_color[0]; |
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f->data[1][chromay * f->linesize[1] + chromax] = s->yuv_color[1]; |
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f->data[2][chromay * f->linesize[2] + chromax] = s->yuv_color[2]; |
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} |
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static int filter_brng(SignalstatsContext *s, const AVFrame *in, AVFrame *out, int y, int w, int h) |
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{ |
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int x, score = 0; |
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const int yc = y >> s->vsub; |
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const uint8_t *pluma = &in->data[0][y * in->linesize[0]]; |
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const uint8_t *pchromau = &in->data[1][yc * in->linesize[1]]; |
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const uint8_t *pchromav = &in->data[2][yc * in->linesize[2]]; |
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for (x = 0; x < w; x++) { |
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const int xc = x >> s->hsub; |
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const int luma = pluma[x]; |
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const int chromau = pchromau[xc]; |
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const int chromav = pchromav[xc]; |
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const int filt = luma < 16 || luma > 235 || |
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chromau < 16 || chromau > 240 || |
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chromav < 16 || chromav > 240; |
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score += filt; |
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if (out && filt) |
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burn_frame(s, out, x, y); |
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} |
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return score; |
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} |
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static int filter_tout_outlier(uint8_t x, uint8_t y, uint8_t z) |
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{ |
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return ((abs(x - y) + abs (z - y)) / 2) - abs(z - x) > 4; // make 4 configurable?
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} |
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static int filter_tout(SignalstatsContext *s, const AVFrame *in, AVFrame *out, int y, int w, int h) |
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{ |
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const uint8_t *p = in->data[0]; |
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int lw = in->linesize[0]; |
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int x, score = 0, filt; |
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if (y - 1 < 0 || y + 1 >= h) |
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return 0; |
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// detect two pixels above and below (to eliminate interlace artefacts)
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// should check that video format is infact interlaced.
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#define FILTER(i, j) \ |
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filter_tout_outlier(p[(y-j) * lw + x + i], \
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p[ y * lw + x + i], \
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p[(y+j) * lw + x + i]) |
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#define FILTER3(j) (FILTER(-1, j) && FILTER(0, j) && FILTER(1, j)) |
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if (y - 2 >= 0 && y + 2 < h) { |
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for (x = 1; x < w - 1; x++) { |
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filt = FILTER3(2) && FILTER3(1); |
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score += filt; |
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if (filt && out) |
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burn_frame(s, out, x, y); |
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} |
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} else { |
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for (x = 1; x < w - 1; x++) { |
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filt = FILTER3(1); |
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score += filt; |
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if (filt && out) |
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burn_frame(s, out, x, y); |
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} |
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} |
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return score; |
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} |
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#define VREP_START 4 |
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static void filter_init_vrep(SignalstatsContext *s, const AVFrame *p, int w, int h) |
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{ |
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int i, y; |
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int lw = p->linesize[0]; |
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for (y = VREP_START; y < h; y++) { |
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int totdiff = 0; |
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int y2lw = (y - VREP_START) * lw; |
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int ylw = y * lw; |
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for (i = 0; i < w; i++) |
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totdiff += abs(p->data[0][y2lw + i] - p->data[0][ylw + i]); |
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/* this value should be definable */ |
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s->vrep_line[y] = totdiff < w; |
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} |
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} |
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static int filter_vrep(SignalstatsContext *s, const AVFrame *in, AVFrame *out, int y, int w, int h) |
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{ |
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int x, score = 0; |
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if (y < VREP_START) |
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return 0; |
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for (x = 0; x < w; x++) { |
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if (s->vrep_line[y]) { |
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score++; |
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if (out) |
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burn_frame(s, out, x, y); |
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} |
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} |
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return score; |
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} |
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static const struct { |
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const char *name; |
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void (*init)(SignalstatsContext *s, const AVFrame *p, int w, int h); |
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int (*process)(SignalstatsContext *s, const AVFrame *in, AVFrame *out, int y, int w, int h); |
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} filters_def[] = { |
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{"TOUT", NULL, filter_tout}, |
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{"VREP", filter_init_vrep, filter_vrep}, |
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{"BRNG", NULL, filter_brng}, |
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{NULL} |
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}; |
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#define DEPTH 256 |
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static int filter_frame(AVFilterLink *link, AVFrame *in) |
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{ |
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SignalstatsContext *s = link->dst->priv; |
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AVFilterLink *outlink = link->dst->outputs[0]; |
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AVFrame *out = in; |
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int i, j; |
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int w = 0, cw = 0, // in
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pw = 0, cpw = 0; // prev
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int yuv, yuvu, yuvv; |
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int fil; |
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char metabuf[128]; |
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unsigned int histy[DEPTH] = {0}, |
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histu[DEPTH] = {0}, |
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histv[DEPTH] = {0}, |
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histhue[360] = {0}, |
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histsat[DEPTH] = {0}; // limited to 8 bit data.
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int miny = -1, minu = -1, minv = -1; |
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int maxy = -1, maxu = -1, maxv = -1; |
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int lowy = -1, lowu = -1, lowv = -1; |
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int highy = -1, highu = -1, highv = -1; |
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int minsat = -1, maxsat = -1, lowsat = -1, highsat = -1; |
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int lowp, highp, clowp, chighp; |
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int accy, accu, accv; |
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int accsat, acchue = 0; |
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int medhue, maxhue; |
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int toty = 0, totu = 0, totv = 0, totsat=0; |
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int tothue = 0; |
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int dify = 0, difu = 0, difv = 0; |
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int filtot[FILT_NUMB] = {0}; |
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AVFrame *prev; |
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if (!s->frame_prev) |
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s->frame_prev = av_frame_clone(in); |
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prev = s->frame_prev; |
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if (s->outfilter != FILTER_NONE) |
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out = av_frame_clone(in); |
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for (fil = 0; fil < FILT_NUMB; fil ++) |
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if ((s->filters & 1<<fil) && filters_def[fil].init) |
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filters_def[fil].init(s, in, link->w, link->h); |
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// Calculate luma histogram and difference with previous frame or field.
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for (j = 0; j < link->h; j++) { |
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for (i = 0; i < link->w; i++) { |
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yuv = in->data[0][w + i]; |
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histy[yuv]++; |
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dify += abs(in->data[0][w + i] - prev->data[0][pw + i]); |
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} |
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w += in->linesize[0]; |
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pw += prev->linesize[0]; |
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} |
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// Calculate chroma histogram and difference with previous frame or field.
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for (j = 0; j < s->chromah; j++) { |
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for (i = 0; i < s->chromaw; i++) { |
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int sat, hue; |
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yuvu = in->data[1][cw+i]; |
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yuvv = in->data[2][cw+i]; |
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histu[yuvu]++; |
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difu += abs(in->data[1][cw+i] - prev->data[1][cpw+i]); |
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histv[yuvv]++; |
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difv += abs(in->data[2][cw+i] - prev->data[2][cpw+i]); |
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// int or round?
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sat = hypot(yuvu - 128, yuvv - 128); |
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histsat[sat]++; |
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hue = floor((180 / M_PI) * atan2f(yuvu-128, yuvv-128) + 180); |
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histhue[hue]++; |
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} |
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cw += in->linesize[1]; |
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cpw += prev->linesize[1]; |
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} |
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for (j = 0; j < link->h; j++) { |
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for (fil = 0; fil < FILT_NUMB; fil ++) { |
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if (s->filters & 1<<fil) { |
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AVFrame *dbg = out != in && s->outfilter == fil ? out : NULL; |
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filtot[fil] += filters_def[fil].process(s, in, dbg, j, link->w, link->h); |
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} |
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} |
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} |
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// find low / high based on histogram percentile
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// these only need to be calculated once.
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lowp = lrint(s->fs * 10 / 100.); |
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highp = lrint(s->fs * 90 / 100.); |
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clowp = lrint(s->cfs * 10 / 100.); |
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chighp = lrint(s->cfs * 90 / 100.); |
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accy = accu = accv = accsat = 0; |
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for (fil = 0; fil < DEPTH; fil++) { |
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if (miny < 0 && histy[fil]) miny = fil; |
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if (minu < 0 && histu[fil]) minu = fil; |
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if (minv < 0 && histv[fil]) minv = fil; |
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if (minsat < 0 && histsat[fil]) minsat = fil; |
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if (histy[fil]) maxy = fil; |
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if (histu[fil]) maxu = fil; |
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if (histv[fil]) maxv = fil; |
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if (histsat[fil]) maxsat = fil; |
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toty += histy[fil] * fil; |
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totu += histu[fil] * fil; |
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totv += histv[fil] * fil; |
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totsat += histsat[fil] * fil; |
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accy += histy[fil]; |
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accu += histu[fil]; |
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accv += histv[fil]; |
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accsat += histsat[fil]; |
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if (lowy == -1 && accy >= lowp) lowy = fil; |
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if (lowu == -1 && accu >= clowp) lowu = fil; |
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if (lowv == -1 && accv >= clowp) lowv = fil; |
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if (lowsat == -1 && accsat >= clowp) lowsat = fil; |
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if (highy == -1 && accy >= highp) highy = fil; |
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if (highu == -1 && accu >= chighp) highu = fil; |
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if (highv == -1 && accv >= chighp) highv = fil; |
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if (highsat == -1 && accsat >= chighp) highsat = fil; |
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} |
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maxhue = histhue[0]; |
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medhue = -1; |
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for (fil = 0; fil < 360; fil++) { |
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tothue += histhue[fil] * fil; |
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acchue += histhue[fil]; |
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if (medhue == -1 && acchue > s->cfs / 2) |
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medhue = fil; |
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if (histhue[fil] > maxhue) { |
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maxhue = histhue[fil]; |
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} |
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} |
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av_frame_free(&s->frame_prev); |
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s->frame_prev = av_frame_clone(in); |
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#define SET_META(key, fmt, val) do { \ |
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snprintf(metabuf, sizeof(metabuf), fmt, val); \
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av_dict_set(&out->metadata, "lavfi.signalstats." key, metabuf, 0); \
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} while (0) |
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SET_META("YMIN", "%d", miny); |
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SET_META("YLOW", "%d", lowy); |
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SET_META("YAVG", "%g", 1.0 * toty / s->fs); |
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SET_META("YHIGH", "%d", highy); |
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SET_META("YMAX", "%d", maxy); |
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SET_META("UMIN", "%d", minu); |
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SET_META("ULOW", "%d", lowu); |
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SET_META("UAVG", "%g", 1.0 * totu / s->cfs); |
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SET_META("UHIGH", "%d", highu); |
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SET_META("UMAX", "%d", maxu); |
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SET_META("VMIN", "%d", minv); |
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SET_META("VLOW", "%d", lowv); |
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SET_META("VAVG", "%g", 1.0 * totv / s->cfs); |
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SET_META("VHIGH", "%d", highv); |
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SET_META("VMAX", "%d", maxv); |
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SET_META("SATMIN", "%d", minsat); |
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SET_META("SATLOW", "%d", lowsat); |
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SET_META("SATAVG", "%g", 1.0 * totsat / s->cfs); |
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SET_META("SATHIGH", "%d", highsat); |
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SET_META("SATMAX", "%d", maxsat); |
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SET_META("HUEMED", "%d", medhue); |
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SET_META("HUEAVG", "%g", 1.0 * tothue / s->cfs); |
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SET_META("YDIF", "%g", 1.0 * dify / s->fs); |
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SET_META("UDIF", "%g", 1.0 * difu / s->cfs); |
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SET_META("VDIF", "%g", 1.0 * difv / s->cfs); |
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for (fil = 0; fil < FILT_NUMB; fil ++) { |
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if (s->filters & 1<<fil) { |
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char metaname[128]; |
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snprintf(metabuf, sizeof(metabuf), "%g", 1.0 * filtot[fil] / s->fs); |
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snprintf(metaname, sizeof(metaname), "lavfi.signalstats.%s", filters_def[fil].name); |
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av_dict_set(&out->metadata, metaname, metabuf, 0); |
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} |
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} |
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if (in != out) |
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av_frame_free(&in); |
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return ff_filter_frame(outlink, out); |
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} |
||||
|
||||
static const AVFilterPad signalstats_inputs[] = { |
||||
{ |
||||
.name = "default", |
||||
.type = AVMEDIA_TYPE_VIDEO, |
||||
.filter_frame = filter_frame, |
||||
}, |
||||
{ NULL } |
||||
}; |
||||
|
||||
static const AVFilterPad signalstats_outputs[] = { |
||||
{ |
||||
.name = "default", |
||||
.config_props = config_props, |
||||
.type = AVMEDIA_TYPE_VIDEO, |
||||
}, |
||||
{ NULL } |
||||
}; |
||||
|
||||
AVFilter ff_vf_signalstats = { |
||||
.name = "signalstats", |
||||
.description = "Generate statistics from video analysis.", |
||||
.init = init, |
||||
.uninit = uninit, |
||||
.query_formats = query_formats, |
||||
.priv_size = sizeof(SignalstatsContext), |
||||
.inputs = signalstats_inputs, |
||||
.outputs = signalstats_outputs, |
||||
.priv_class = &signalstats_class, |
||||
}; |
||||
Loading…
Reference in new issue