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According to QUIP-18 [1], all tools and utils files should be
LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
[1]: https://contribute.qt-project.org/quips/18
Pick-to: 6.7
Task-number: QTBUG-121787
Change-Id: Ib0cd8399a10fc9bd2e058df61b314171dd31244f
Reviewed-by: Kai Köhne <kai.koehne@qt.io>
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What is the utility able to do:
- Enquires a vast set of audio devices configurations via
AudioObjectGetPropertyData.
- dumps results.
- check the configuration many times in order to check if it's stable.
Why do we need it:
We have bugs with QtMM on macOS with audio input/output that
are not reproducible with development environments.
Pretty often such bugs have smth to do with specific audio devices on
the bug reporter's side, and it's unclear what AudioObjectGetPropertyData
returns in these cases.
When I was investigating previous bugs, I attached such a code to
the ticket so that bug reporters could provide more info.
In light of the above, it's reasonable to have such a utility in
the qt repo. Having it now in a single file could simplify its
compilation and run by customers (just one command in README).
Pick-to: 6.5 6.4
Task-number: QTBUG-108176
Change-Id: I3560353c78a0852a426f25b3487ab0a93e39c03f
Reviewed-by: Piotr Srebrny <piotr.srebrny@qt.io>
Reviewed-by: Lars Knoll <lars@knoll.priv.no>
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Replace the current license disclaimer in files by
a SPDX-License-Identifier.
License files are organized under LICENSES directory.
Pick-to: 6.4
Task-number: QTBUG-67283
Change-Id: Ida08dfe6c84778656e942178c3d39042c9ef1ed2
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
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Move the classes from src/multimedia/spatial into its own
QtSpatialAudio library.
This is required to keep Qt Multimedia compatible with the
requirements from the KDE Free Qt Foundation agreement, as
well as to keep license compatibility with existing applications
licensed under GPLv2 that are using Qt Multimedia.
Moving the classes into a module of their own required a few
additional changes to ensure we generate proper documentation
for the new spatial audio module.
To align the API between C++ and QML, the QML import was also
renamed to QtQuick3D.SpatialAudio.
Pick-to: 6.4
Change-Id: Ia3f9ac5e1edac4b1e07d3302d7a229ada5bdc038
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
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Stereo mode was quite a bit louder that Surround mode when
sent to the same speaker array. This raises the volume of
the surround decoder matrices by a factor of 1.5 which
seems to approximately account for the volume difference
between the modes.
Change-Id: I6eb2db535449e17cf6d7c5e2c63cb60de3f34369
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
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Use the correct channel order and normalization of the ambisonic
channels. Resonance Audio expects Ambix compatible ordering
(ie. ACN channel order) and normalization (SN3D).
Specify that we want that ordering in the script generating the
speaker data and normalize the factors correctly to SN3D.
Add hand coded handling for Mono, Stereo, 2Dot1, 3Dot0 and
3Dot1 speaker configurations as those do not cover the
area behind the listener and thus don't really qualify as
a surround configuration.
Change-Id: I905ddaa81938df918a460a7dea0526444836cdff
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
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Resonance Audio uses ambisonic data internally and has builtin support to
convert the spatial data to binaural headphone signals. It does however
not support converting the data to surround speaker configurations.
This adt_generat_qt.m file is a matlab/octave script that generates mapping
data from ambisonic sound data to various loudspeaker configurations. This uses
the Ambisonic Decoder Toolbox to generate the data.
The new ambisonic decoder adds internal API to convert ambisonic sound data
into various loudspeaker configurations. This gives us decent support for spatial
audio not only on headphones, but also on various surround systems.
Change-Id: I67c43e8f26904e39b96e5667971b72f283a0d86c
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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