int64_t black_min_duration; ///< minimum duration of detected black, expressed in timebase units
int64_t black_start; ///< pts start time of the first black picture
int64_t black_end; ///< pts end time of the last black picture
+ int64_t last_picref_pts; ///< pts of the last input picture
int black_started;
double picture_black_ratio_th;
return 0;
}
+static void check_black_end(AVFilterContext *ctx)
+{
+ BlackDetectContext *blackdetect = ctx->priv;
+ AVFilterLink *inlink = ctx->inputs[0];
+
+ if ((blackdetect->black_end - blackdetect->black_start) >= blackdetect->black_min_duration) {
+ av_log(blackdetect, AV_LOG_INFO,
+ "black_start:%s black_end:%s black_duration:%s\n",
+ av_ts2timestr(blackdetect->black_start, &inlink->time_base),
+ av_ts2timestr(blackdetect->black_end, &inlink->time_base),
+ av_ts2timestr(blackdetect->black_end - blackdetect->black_start, &inlink->time_base));
+ }
+}
+
+static int request_frame(AVFilterLink *outlink)
+{
+ AVFilterContext *ctx = outlink->src;
+ BlackDetectContext *blackdetect = ctx->priv;
+ AVFilterLink *inlink = ctx->inputs[0];
+ int ret = avfilter_request_frame(inlink);
+
+ if (ret == AVERROR_EOF && blackdetect->black_started) {
+ // FIXME: black_end should be set to last_picref_pts + last_picref_duration
+ blackdetect->black_end = blackdetect->last_picref_pts;
+ check_black_end(ctx);
+ }
+ return ret;
+}
+
static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir)
{
AVFilterContext *ctx = inlink->dst;
/* black ends here */
blackdetect->black_started = 0;
blackdetect->black_end = picref->pts;
-
- if ((blackdetect->black_end - blackdetect->black_start) >= blackdetect->black_min_duration) {
- av_log(blackdetect, AV_LOG_INFO,
- "black_start:%s black_end:%s black_duration:%s\n",
- av_ts2timestr(blackdetect->black_start, &inlink->time_base),
- av_ts2timestr(blackdetect->black_end, &inlink->time_base),
- av_ts2timestr(blackdetect->black_end - blackdetect->black_start, &inlink->time_base));
- }
+ check_black_end(ctx);
}
+ blackdetect->last_picref_pts = picref->pts;
blackdetect->frame_count++;
blackdetect->nb_black_pixels = 0;
avfilter_unref_buffer(picref);
.outputs = (const AVFilterPad[]) {
{ .name = "default",
- .type = AVMEDIA_TYPE_VIDEO },
+ .type = AVMEDIA_TYPE_VIDEO,
+ .request_frame = request_frame, },
{ .name = NULL }
},
};