1.1.0

Removed

• adm_parent references in ADM objects.

Added

• Matrix type support.
• Simple validation of ADM data model, and more extensive validation of ADM
  structures.
• Support for rendering objects with silent audioTrackUID references.
• Support for audioPackFormat HOA parameters.
• Selection of audioProgramme and complementary audioObjects from
  ear-render.
• adm_path to RenderingItems, with pointers to the corresponding ADM
  objects. This is not used by the renderer but is a useful feature for other
  applications built on top of the underlying ADM library.
• Support for more flexible referencing of nested audioPackFormats; each
  audioTrackUID or chna row can reference any appropriate audioPackFormat
  on the path from the root audioPackFormat (which contains the full set of
  audioChannelFormats used) to the audioPackFormat that contains the
  audioChannelFormat of the track.
• Better support for using multi-channel audioPackFormats -- in an
  audioObject or chna-only file using multiple audioPackFormats may be
  ambiguous if they share some audioChannelFormats. This should now be
  handled correctly in all cases.

Changed

• The reference direction between audioTrackFormat and audioStreamFormat
  was reversed in the data model (audioTrackFormats now point at a single
  audioStreamFormat), and axml references in either direction now establish
  this relationship. Note that this does not follow the exact wording in
  BS.2076-1, but this helps compatibility with other systems and should match
  future revisions of BS.2076. If either of these references are omitted a
  warning will be issued when a file is rendered. When generating BW64+ADM
  files (with ear-utils) both reference directions are now included.
• Complete re-implementation of RenderingItem selection to support other
  features in this release. This functionality was moved from
  ear.fileio.utils to ear.core.select_items.
• RenderingItems now use the TrackSpec structure rather than an index to
  point to their source audio, to allow for silent and Matrix tracks.