+int pa_tagstruct_get_format_info(pa_tagstruct *t, pa_format_info *f) {
+ size_t saved_rindex;
+ uint8_t encoding;
+
+ pa_assert(t);
+ pa_assert(f);
+
+ if (t->rindex+1 > t->length)
+ return -1;
+
+ if (t->data[t->rindex] != PA_TAG_FORMAT_INFO)
+ return -1;
+
+ saved_rindex = t->rindex;
+ t->rindex++;
+
+ if (pa_tagstruct_getu8(t, &encoding) < 0)
+ goto fail;
+
+ f->encoding = encoding;
+
+ if (pa_tagstruct_get_proplist(t, f->plist) < 0)
+ goto fail;
+
+ return 0;
+
+fail:
+ t->rindex = saved_rindex;
+ return -1;
+}
+