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[FFmpeg-devel,v3,2/4] avfilter/vf_framerate: if metadata lavfi.scd.mafd exists, we'll use it first

Message ID 20191008090803.20295-2-lance.lmwang@gmail.com
State Superseded
Headers show

Commit Message

Lance Wang Oct. 8, 2019, 9:08 a.m. UTC 
From: Limin Wang <lance.lmwang@gmail.com>

Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
---
 libavfilter/vf_framerate.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)
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Patch

diff --git a/libavfilter/vf_framerate.c b/libavfilter/vf_framerate.c
index 6c8d01c94b..8d16998457 100644
--- a/libavfilter/vf_framerate.c
+++ b/libavfilter/vf_framerate.c
@@ -71,13 +71,20 @@  static double get_scene_score(AVFilterContext *ctx, AVFrame *crnt, AVFrame *next
 
     if (crnt->height == next->height &&
         crnt->width  == next->width) {
+        AVDictionaryEntry *e_mafd = NULL;
         uint64_t sad;
-        double mafd, diff;
+        double mafd = HUGE_VAL, diff;
+        char *tail = NULL;
 
         ff_dlog(ctx, "get_scene_score() process\n");
-        s->sad(crnt->data[0], crnt->linesize[0], next->data[0], next->linesize[0], crnt->width, crnt->height, &sad);
-        emms_c();
-        mafd = (double)sad * 100.0 / (crnt->width * crnt->height) / (1 << s->bitdepth);
+        e_mafd = av_dict_get(next->metadata, "lavfi.scd.mafd", NULL, AV_DICT_MATCH_CASE);
+        if (e_mafd)
+            mafd = strtod(e_mafd->value, &tail);
+        if (*tail || mafd == HUGE_VAL) {
+            s->sad(crnt->data[0], crnt->linesize[0], next->data[0], next->linesize[0], crnt->width, crnt->height, &sad);
+            emms_c();
+            mafd = (double)sad * 100.0 / (crnt->width * crnt->height) / (1 << s->bitdepth);
+        }
         diff = fabs(mafd - s->prev_mafd);
         ret  = av_clipf(FFMIN(mafd, diff), 0, 100.0);
         s->prev_mafd = mafd;