mirror of https://github.com/FFmpeg/FFmpeg.git
Paul B Mahol
2 years ago
parent
9ca139b2aa
commit
f0f19f3d3d
6 changed files with 366 additions and 1 deletions
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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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/**
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* @file |
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* Calculate the correlation between two input videos. |
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*/ |
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#include "libavutil/avstring.h" |
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#include "libavutil/opt.h" |
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#include "libavutil/pixdesc.h" |
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#include "avfilter.h" |
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#include "drawutils.h" |
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#include "formats.h" |
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#include "framesync.h" |
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#include "internal.h" |
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#include "video.h" |
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typedef struct CorrContext { |
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const AVClass *class; |
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FFFrameSync fs; |
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double score, min_score, max_score, score_comp[4]; |
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uint64_t nb_frames; |
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int is_rgb; |
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uint8_t rgba_map[4]; |
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int max[4]; |
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char comps[4]; |
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int nb_components; |
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int planewidth[4]; |
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int planeheight[4]; |
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int (*filter_slice)(AVFilterContext *ctx, void *arg, |
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int jobnr, int nb_jobs); |
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} CorrContext; |
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#define OFFSET(x) offsetof(CorrContext, x) |
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#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM |
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static void set_meta(AVFilterContext *ctx, |
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AVDictionary **metadata, const char *key, char comp, float d) |
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{ |
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char value[128]; |
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snprintf(value, sizeof(value), "%f", d); |
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if (comp) { |
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char key2[128]; |
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snprintf(key2, sizeof(key2), "lavfi.%s.%s%s%c", |
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ctx->filter->name, ctx->filter->name, key, comp); |
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av_dict_set(metadata, key2, value, 0); |
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} else { |
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char key2[128]; |
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snprintf(key2, sizeof(key2), "lavfi.%s.%s%s", |
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ctx->filter->name, ctx->filter->name, key); |
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av_dict_set(metadata, key2, value, 0); |
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} |
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} |
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#define CORR(type, name) \ |
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static void f##name(AVFilterContext *ctx, AVFrame *master, \
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AVFrame *ref, double *comp_score) \
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{ \
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CorrContext *s = ctx->priv; \
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\
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for (int c = 0; c < s->nb_components; c++) { \
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const ptrdiff_t linesize1 = master->linesize[c] / \
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sizeof(type); \
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const ptrdiff_t linesize2 = ref->linesize[c] / \
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sizeof(type); \
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const type *src1 = (const type *)master->data[c]; \
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const type *src2 = (const type *)ref->data[c]; \
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const int h = s->planeheight[c]; \
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const int w = s->planewidth[c]; \
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const float scale = 1.f / s->max[c]; \
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uint64_t sum1 = 0, sum2 = 0; \
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float sum12, sum1q, sum2q; \
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float sumq, mean1, mean2; \
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\
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for (int y = 0; y < h; y++) { \
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for (int x = 0; x < w; x++) { \
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sum1 += src1[x]; \
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sum2 += src2[x]; \
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} \
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\
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src1 += linesize1; \
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src2 += linesize2; \
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} \
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\
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mean1 = scale * (sum1 /(double)(w * h)); \
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mean2 = scale * (sum2 /(double)(w * h)); \
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\
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src1 = (const type *)master->data[c]; \
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src2 = (const type *)ref->data[c]; \
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\
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sum12 = 0.f; \
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sum1q = 0.f; \
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sum2q = 0.f; \
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\
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for (int y = 0; y < h; y++) { \
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for (int x = 0; x < w; x++) { \
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const float f1 = scale * src1[x] - mean1; \
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const float f2 = scale * src2[x] - mean2; \
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\
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sum12 += f1 * f2; \
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sum1q += f1 * f1; \
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sum2q += f2 * f2; \
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} \
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\
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src1 += linesize1; \
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src2 += linesize2; \
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} \
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\
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sumq = sqrtf(sum1q * sum2q); \
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if (sumq > 0.f) { \
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comp_score[c] = av_clipf(sum12 / sumq,-1.f,1.f); \
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} else { \
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comp_score[c] = sum1q == sum2q ? 1.f : 0.f; \
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} \
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} \
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} |
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CORR(uint8_t, corr8) |
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CORR(uint16_t, corr16) |
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static int do_corr(FFFrameSync *fs) |
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{ |
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AVFilterContext *ctx = fs->parent; |
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CorrContext *s = ctx->priv; |
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AVFrame *master, *ref; |
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double comp_score[4], score = 0.; |
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AVDictionary **metadata; |
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int ret; |
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ret = ff_framesync_dualinput_get(fs, &master, &ref); |
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if (ret < 0) |
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return ret; |
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if (ctx->is_disabled || !ref) |
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return ff_filter_frame(ctx->outputs[0], master); |
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metadata = &master->metadata; |
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if (s->max[0] > 255) { |
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fcorr16(ctx, master, ref, comp_score); |
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} else { |
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fcorr8(ctx, master, ref, comp_score); |
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} |
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for (int c = 0; c < s->nb_components; c++) |
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score += comp_score[c]; |
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score /= s->nb_components; |
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s->score += score; |
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s->min_score = fmin(s->min_score, score); |
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s->max_score = fmax(s->max_score, score); |
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for (int c = 0; c < s->nb_components; c++) |
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s->score_comp[c] += comp_score[c]; |
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s->nb_frames++; |
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for (int j = 0; j < s->nb_components; j++) { |
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int c = s->is_rgb ? s->rgba_map[j] : j; |
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set_meta(ctx, metadata, ".", s->comps[j], comp_score[c]); |
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} |
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set_meta(ctx, metadata, "_avg", 0, score); |
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return ff_filter_frame(ctx->outputs[0], master); |
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} |
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static av_cold int init(AVFilterContext *ctx) |
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{ |
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CorrContext *s = ctx->priv; |
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s->fs.on_event = do_corr; |
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return 0; |
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} |
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static const enum AVPixelFormat pix_fmts[] = { |
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AV_PIX_FMT_GRAY8, AV_PIX_FMT_GRAY9, AV_PIX_FMT_GRAY10, AV_PIX_FMT_GRAY12, AV_PIX_FMT_GRAY14, AV_PIX_FMT_GRAY16, |
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#define PF_NOALPHA(suf) AV_PIX_FMT_YUV420##suf, AV_PIX_FMT_YUV422##suf, AV_PIX_FMT_YUV444##suf |
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#define PF_ALPHA(suf) AV_PIX_FMT_YUVA420##suf, AV_PIX_FMT_YUVA422##suf, AV_PIX_FMT_YUVA444##suf |
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#define PF(suf) PF_NOALPHA(suf), PF_ALPHA(suf) |
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PF(P), PF(P9), PF(P10), PF_NOALPHA(P12), PF_NOALPHA(P14), PF(P16), |
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AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV411P, AV_PIX_FMT_YUV410P, |
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AV_PIX_FMT_YUVJ411P, AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, |
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AV_PIX_FMT_YUVJ440P, AV_PIX_FMT_YUVJ444P, |
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AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRP9, AV_PIX_FMT_GBRP10, |
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AV_PIX_FMT_GBRP12, AV_PIX_FMT_GBRP14, AV_PIX_FMT_GBRP16, |
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AV_PIX_FMT_GBRAP, AV_PIX_FMT_GBRAP10, AV_PIX_FMT_GBRAP12, AV_PIX_FMT_GBRAP16, |
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AV_PIX_FMT_NONE |
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}; |
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static int config_input_ref(AVFilterLink *inlink) |
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{ |
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
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AVFilterContext *ctx = inlink->dst; |
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CorrContext *s = ctx->priv; |
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s->nb_components = desc->nb_components; |
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if (ctx->inputs[0]->w != ctx->inputs[1]->w || |
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ctx->inputs[0]->h != ctx->inputs[1]->h) { |
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av_log(ctx, AV_LOG_ERROR, "Width and height of input videos must be same.\n"); |
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return AVERROR(EINVAL); |
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} |
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s->is_rgb = ff_fill_rgba_map(s->rgba_map, inlink->format) >= 0; |
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s->comps[0] = s->is_rgb ? 'R' : 'Y' ; |
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s->comps[1] = s->is_rgb ? 'G' : 'U' ; |
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s->comps[2] = s->is_rgb ? 'B' : 'V' ; |
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s->comps[3] = 'A'; |
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s->planeheight[1] = s->planeheight[2] = AV_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); |
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s->planeheight[0] = s->planeheight[3] = inlink->h; |
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s->planewidth[1] = s->planewidth[2] = AV_CEIL_RSHIFT(inlink->w, desc->log2_chroma_w); |
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s->planewidth[0] = s->planewidth[3] = inlink->w; |
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s->min_score = +INFINITY; |
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s->max_score = -INFINITY; |
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s->max[0] = (1 << desc->comp[0].depth) - 1; |
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s->max[1] = (1 << desc->comp[1].depth) - 1; |
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s->max[2] = (1 << desc->comp[2].depth) - 1; |
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s->max[3] = (1 << desc->comp[3].depth) - 1; |
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return 0; |
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} |
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static int config_output(AVFilterLink *outlink) |
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{ |
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AVFilterContext *ctx = outlink->src; |
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CorrContext *s = ctx->priv; |
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AVFilterLink *mainlink = ctx->inputs[0]; |
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int ret; |
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ret = ff_framesync_init_dualinput(&s->fs, ctx); |
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if (ret < 0) |
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return ret; |
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outlink->w = mainlink->w; |
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outlink->h = mainlink->h; |
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outlink->time_base = mainlink->time_base; |
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outlink->sample_aspect_ratio = mainlink->sample_aspect_ratio; |
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outlink->frame_rate = mainlink->frame_rate; |
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if ((ret = ff_framesync_configure(&s->fs)) < 0) |
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return ret; |
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outlink->time_base = s->fs.time_base; |
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if (av_cmp_q(mainlink->time_base, outlink->time_base) || |
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av_cmp_q(ctx->inputs[1]->time_base, outlink->time_base)) |
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av_log(ctx, AV_LOG_WARNING, "not matching timebases found between first input: %d/%d and second input %d/%d, results may be incorrect!\n", |
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mainlink->time_base.num, mainlink->time_base.den, |
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ctx->inputs[1]->time_base.num, ctx->inputs[1]->time_base.den); |
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return 0; |
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} |
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static int activate(AVFilterContext *ctx) |
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{ |
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CorrContext *s = ctx->priv; |
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return ff_framesync_activate(&s->fs); |
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} |
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static av_cold void uninit(AVFilterContext *ctx) |
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{ |
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CorrContext *s = ctx->priv; |
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if (s->nb_frames > 0) { |
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char buf[256]; |
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buf[0] = 0; |
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for (int j = 0; j < s->nb_components; j++) { |
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int c = s->is_rgb ? s->rgba_map[j] : j; |
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av_strlcatf(buf, sizeof(buf), " %c:%f", s->comps[j], s->score_comp[c] / s->nb_frames); |
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} |
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av_log(ctx, AV_LOG_INFO, "%s%s average:%f min:%f max:%f\n", |
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ctx->filter->name, |
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buf, |
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s->score / s->nb_frames, |
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s->min_score, |
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s->max_score); |
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} |
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ff_framesync_uninit(&s->fs); |
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} |
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static const AVFilterPad corr_inputs[] = { |
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{ |
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.name = "main", |
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.type = AVMEDIA_TYPE_VIDEO, |
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},{ |
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.name = "reference", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.config_props = config_input_ref, |
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}, |
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}; |
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static const AVFilterPad corr_outputs[] = { |
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{ |
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.name = "default", |
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.type = AVMEDIA_TYPE_VIDEO, |
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.config_props = config_output, |
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}, |
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}; |
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static const AVOption options[] = { |
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{ NULL } |
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}; |
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#define corr_options options |
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FRAMESYNC_DEFINE_CLASS(corr, CorrContext, fs); |
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const AVFilter ff_vf_corr = { |
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.name = "corr", |
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.description = NULL_IF_CONFIG_SMALL("Calculate the correlation between two video streams."), |
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.preinit = corr_framesync_preinit, |
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.init = init, |
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.uninit = uninit, |
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.activate = activate, |
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.priv_size = sizeof(CorrContext), |
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.priv_class = &corr_class, |
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FILTER_INPUTS(corr_inputs), |
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FILTER_OUTPUTS(corr_outputs), |
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FILTER_PIXFMTS_ARRAY(pix_fmts), |
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.flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL | |
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AVFILTER_FLAG_METADATA_ONLY, |
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}; |
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