mirror of https://git.ffmpeg.org/ffmpeg.git
337 lines
12 KiB
C
337 lines
12 KiB
C
/*
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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 "framesync.h"
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#include "internal.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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