+static void profile_finalize_probing(pa_alsa_profile *to_be_finalized, pa_alsa_profile *next) {
+ pa_alsa_mapping *m;
+ uint32_t idx;
+
+ if (!to_be_finalized)
+ return;
+
+ if (to_be_finalized->output_mappings)
+ PA_IDXSET_FOREACH(m, to_be_finalized->output_mappings, idx) {
+
+ if (!m->output_pcm)
+ continue;
+
+ if (to_be_finalized->supported)
+ m->supported++;
+
+ /* If this mapping is also in the next profile, we won't close the
+ * pcm handle here, because it would get immediately reopened
+ * anyway. */
+ if (next && next->output_mappings && pa_idxset_get_by_data(next->output_mappings, m, NULL))
+ continue;
+
+ snd_pcm_close(m->output_pcm);
+ m->output_pcm = NULL;
+ }
+
+ if (to_be_finalized->input_mappings)
+ PA_IDXSET_FOREACH(m, to_be_finalized->input_mappings, idx) {
+
+ if (!m->input_pcm)
+ continue;
+
+ if (to_be_finalized->supported)
+ m->supported++;
+
+ /* If this mapping is also in the next profile, we won't close the
+ * pcm handle here, because it would get immediately reopened
+ * anyway. */
+ if (next && next->input_mappings && pa_idxset_get_by_data(next->input_mappings, m, NULL))
+ continue;
+
+ snd_pcm_close(m->input_pcm);
+ m->input_pcm = NULL;
+ }
+}
+
+static snd_pcm_t* mapping_open_pcm(pa_alsa_mapping *m,
+ const pa_sample_spec *ss,
+ const char *dev_id,
+ int mode,
+ unsigned default_n_fragments,
+ unsigned default_fragment_size_msec) {
+
+ pa_sample_spec try_ss = *ss;
+ pa_channel_map try_map = m->channel_map;
+ snd_pcm_uframes_t try_period_size, try_buffer_size;
+
+ try_ss.channels = try_map.channels;
+
+ try_period_size =
+ pa_usec_to_bytes(default_fragment_size_msec * PA_USEC_PER_MSEC, &try_ss) /
+ pa_frame_size(&try_ss);
+ try_buffer_size = default_n_fragments * try_period_size;
+
+ return pa_alsa_open_by_template(
+ m->device_strings, dev_id, NULL, &try_ss,
+ &try_map, mode, &try_period_size,
+ &try_buffer_size, 0, NULL, NULL, true);
+}
+
+static void paths_drop_unused(pa_hashmap* h, pa_hashmap *keep) {
+
+ void* state = NULL;
+ const void* key;
+ pa_alsa_path* p;
+
+ pa_assert(h);
+ pa_assert(keep);
+
+ p = pa_hashmap_iterate(h, &state, &key);
+ while (p) {
+ if (pa_hashmap_get(keep, p) == NULL)
+ pa_hashmap_remove_and_free(h, key);
+ p = pa_hashmap_iterate(h, &state, &key);
+ }
+}
+