+
+/* Called from the main thread */
+/* Gets the list of formats supported by the sink. The members and idxset must
+ * be freed by the caller. */
+pa_idxset* pa_sink_get_formats(pa_sink *s) {
+ pa_idxset *ret;
+
+ pa_assert(s);
+
+ if (s->get_formats) {
+ /* Sink supports format query, all is good */
+ ret = s->get_formats(s);
+ } else {
+ /* Sink doesn't support format query, so assume it does PCM */
+ pa_format_info *f = pa_format_info_new();
+ f->encoding = PA_ENCODING_PCM;
+
+ ret = pa_idxset_new(NULL, NULL);
+ pa_idxset_put(ret, f, NULL);
+ }
+
+ return ret;
+}
+
+/* Called from the main thread */
+/* Calculates the intersection between formats supported by the sink and
+ * in_formats, and returns these, in the order of the sink's formats. */
+pa_idxset* pa_sink_check_formats(pa_sink *s, pa_idxset *in_formats) {
+ pa_idxset *out_formats = pa_idxset_new(NULL, NULL), *sink_formats;
+ pa_format_info *f_sink, *f_in;
+ uint32_t i, j;
+
+ pa_assert(s);
+
+ if (!in_formats || pa_idxset_isempty(in_formats))
+ goto done;
+
+ sink_formats = pa_sink_get_formats(s);
+
+ PA_IDXSET_FOREACH(f_sink, sink_formats, i) {
+ PA_IDXSET_FOREACH(f_in, in_formats, j) {
+ if (pa_format_info_is_compatible(f_sink, f_in))
+ pa_idxset_put(out_formats, pa_format_info_copy(f_in), NULL);
+ }
+ }
+
+done:
+ return out_formats;
+}