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avfilter/vf_minterpolate: if metadata lavfi.scd.mafd exists, we'll use it first

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Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
This commit is contained in:
Limin Wang 2019-10-08 23:28:38 +08:00
parent 339593ca90
commit d88e1c9838
1 changed files with 12 additions and 4 deletions
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16
libavfilter/vf_minterpolate.c
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@ -832,11 +832,19 @@ static int detect_scene_change(MIContext *mi_ctx)
ptrdiff_t linesize2 = mi_ctx->frames[2].avf->linesize[0];
if (mi_ctx->scd_method == SCD_METHOD_FDIFF) {
double ret = 0, mafd, diff;
double ret = 0, mafd = HUGE_VAL, diff;
uint64_t sad;
mi_ctx->sad(p1, linesize1, p2, linesize2, me_ctx->width, me_ctx->height, &sad);
emms_c();
mafd = (double) sad / (me_ctx->height * me_ctx->width * 3);
AVDictionaryEntry *e_mafd = NULL;
char *tail = NULL;
e_mafd = av_dict_get(mi_ctx->frames[2].avf->metadata, "lavfi.scd.mafd", NULL, AV_DICT_MATCH_CASE);
if (e_mafd)
mafd = strtod(e_mafd->value, &tail);
if (*tail || mafd == HUGE_VAL) {
mi_ctx->sad(p1, linesize1, p2, linesize2, me_ctx->width, me_ctx->height, &sad);
emms_c();
mafd = (double) sad / (me_ctx->height * me_ctx->width * 3);
}
diff = fabs(mafd - mi_ctx->prev_mafd);
ret = av_clipf(FFMIN(mafd, diff), 0, 100.0);
mi_ctx->prev_mafd = mafd;