+static int aactivate(AVFilterContext *ctx)
+{
+ AVFilterLink *inlink = ctx->inputs[0];
+ AVFilterLink *outlink = ctx->outputs[0];
+ LoopContext *s = ctx->priv;
+ AVFrame *frame = NULL;
+ int ret, status;
+ int64_t pts;
+
+ FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
+
+ if (!s->eof && (s->nb_samples < s->size || !s->loop || !s->size)) {
+ ret = ff_inlink_consume_frame(inlink, &frame);
+ if (ret < 0)
+ return ret;
+ if (ret > 0)
+ return afilter_frame(inlink, frame);
+ }
+
+ if (!s->eof && ff_inlink_acknowledge_status(inlink, &status, &pts)) {
+ if (status == AVERROR_EOF) {
+ s->size = s->nb_samples;
+ s->eof = 1;
+ }
+ }
+
+ if (s->eof && (!s->loop || !s->size)) {
+ ff_outlink_set_status(outlink, AVERROR_EOF, s->duration);
+ return 0;
+ }
+
+ if (!s->eof && (!s->size ||
+ (s->nb_samples < s->size) ||
+ (s->nb_samples >= s->size && s->loop == 0))) {
+ FF_FILTER_FORWARD_WANTED(outlink, inlink);
+ } else if (s->loop && s->nb_samples == s->size) {
+ return arequest_frame(outlink);
+ }
+
+ return FFERROR_NOT_READY;
+}
+