Parse the pymd box

gpac · Feb 29, 2024 · 33e772e · 33e772e
1 parent fbc0348
commit 33e772e
Showing 1 changed file with 23 additions and 0 deletions.
diff --git a/src/parsing/EntityToGroup.js b/src/parsing/EntityToGroup.js
@@ -67,3 +67,26 @@ BoxParser.createEntityToGroupCtor("wbbr");
 
 // Alternative entity (ISO/IEC 23008-12:2022 AMD1 Section 6.8.10)
 BoxParser.createEntityToGroupCtor("prgr");
+
+// Image Pyramid entity group (ISO/IEC 23008-12:20xx Section 6.8.11)
+BoxParser.createEntityToGroupCtor("pymd", function(stream) {
+ this.group_id = stream.readUint32();
+ this.num_entities_in_group = stream.readUint32();
+ this.entity_ids = [];
+ for (var i = 0; i < this.num_entities_in_group; i++) {
+ var entity_id = stream.readUint32();
+ this.entity_ids.push(entity_id);
+ }
+
+ this.tile_size_x = stream.readUint16();
+ this.tile_size_y = stream.readUint16();
+ this.layer_binning = [];
+ this.tiles_in_layer_column_minus1 = [];
+ this.tiles_in_layer_row_minus1 = [];
+ for (i = 0; i < this.num_entities_in_group; i++) {
+ this.layer_binning[i] = stream.readUint16();
+ this.tiles_in_layer_row_minus1[i] = stream.readUint16();
+ this.tiles_in_layer_column_minus1[i] = stream.readUint16();
+ }
+});
+