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CHANGELOG.md

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Changelog

2.0.0 - 2019-05-22

Changes for ITU ADM renderer reference code.

  • Changes to rendering of Objects specified using Cartesian parameters.
  • Added conversion between Cartesian and polar Objects parameters.
  • Changed to BSD-Clear license.

1.2.0 - 2019-05-22

Fixed

  • Slightly non-normalised gains in extent panner.

Changed

  • Improved downmix/upmix behaviour for DirectSpeakers content specified using the common definitions.
  • Change default azimuth of M+-SC to 15.
  • Support wider azimuths for M+-SC; they may now be between 5 and 25 degrees, or 35 and 60 degrees.
  • Removed LFE behaviour for Objects.
  • Validate Cartesian and frequency information for Objects

1.1.2 - 2019-05-22

Fixed

  • Bug whereby NaNs could be produced in polar extent panner.

1.1.1 - 2019-04-12

Fixed

  • aspectRatio is an attribute not an element.
  • Accept the urn:ebu:metadata-schema:ebuCore_2016 namespace.
  • Added default for Z coordinates.
  • Various deprecation warnings.

Added

  • Specified loudspeaker positions are now checked against the allowed ranges.
  • Validation of screenEdgeLock in Objects.

1.1.0 - 2018-11-26

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.

1.0.1 - 2018-11-23

Changed

  • An error will be raised if any audioTrackUID elements or CHNA rows have ID ATU_00000000, as references to these elements could be confused with silent audioTrackUID references.
  • Miscellaneous improvements to testing infrastructure.

Fixed

  • When generating BW64+ADM files (with ear-utils), do not generate audioTrackUIDs with ID ATU_00000000, which (as above) could be confused with silent audioTrackUID references.
  • Updated use of attrs to fix deprecation warnings.
  • Wrong imports and CHNA chunk generation in replace_axml command.
  • Pytest warnings fixed by upgrading pytest-datafiles to 2.0.
  • Error when testing block_aligner on python 3.7 with coverage enabled.
  • Error in PeakMonitor when rendering very short files.
  • dump_chna in binary mode on python 3.
  • Padding character in axml chunk.

1.0.0 - 2018-03-29

Initial release.