select_items: set HOA importances

ear/core/select_items/hoa.py

@@ -35,3 +35,4 @@ def _get_block_format_attr(_audioPackFormat_path, audioChannelFormat, attr):
 get_rtime = partial(_get_block_format_attr, attr="rtime")
 get_duration = partial(_get_block_format_attr, attr="duration")
 get_gain = partial(_get_block_format_attr, attr="gain")
+get_importance = partial(_get_block_format_attr, attr="importance")

ear/core/select_items/select_items.py

@@ -734,8 +734,17 @@ def _get_RenderingItems_DirectSpeakers(state):
 
 def _get_RenderingItems_HOA(state):
     """Get a HOARenderingItem given an _ItemSelectionState."""
-    from .hoa import (get_nfcRefDist, get_screenRef, get_normalization,
-                      get_order, get_degree, get_rtime, get_duration, get_gain)
+    from .hoa import (
+        get_nfcRefDist,
+        get_screenRef,
+        get_normalization,
+        get_order,
+        get_degree,
+        get_rtime,
+        get_duration,
+        get_gain,
+        get_importance,
+    )
 
     states = list(_select_single_channel(state))
 
@@ -748,6 +757,7 @@ def _get_RenderingItems_HOA(state):
         orders=get_per_channel_param(pack_paths_channels, get_order),
         degrees=get_per_channel_param(pack_paths_channels, get_degree),
         gains=get_per_channel_param(pack_paths_channels, get_gain),
+        importances=get_per_channel_param(pack_paths_channels, get_importance),
         normalization=get_single_param(pack_paths_channels, "normalization", get_normalization),
         nfcRefDist=get_single_param(pack_paths_channels, "nfcRefDist", get_nfcRefDist),
         screenRef=get_single_param(pack_paths_channels, "screenRef", get_screenRef),

ear/core/select_items/test/test_hoa.py

@@ -160,3 +160,24 @@ def test_hoa_gains():
     meta = item.metadata_source.get_next_block()
 
     assert meta.gains == gains
+
+
+def test_hoa_importances():
+    builder = HOABuilder()
+
+    importances = [1, 2, 3, 4]
+
+    for channel, importance in zip(builder.first_pack.audioChannelFormats, importances):
+        channel.audioBlockFormats[0].importance = importance
+
+    for i, track in enumerate(builder.first_tracks, 1):
+        builder.create_track_uid(
+            audioPackFormat=builder.first_pack, audioTrackFormat=track, trackIndex=i
+        )
+
+    generate_ids(builder.adm)
+
+    [item] = select_rendering_items(builder.adm)
+    meta = item.metadata_source.get_next_block()
+
+    assert meta.importances == importances