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* Use a higher quality all-pass for the UHJ utilsChris Robinson2021-07-302-8/+17
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* Add a utility to encode audio files to UHJChris Robinson2021-07-091-0/+454
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* Fix UHJ encoding/decoding factorsChris Robinson2021-04-111-1/+3
| | | | | | | | | | | Classic B-Format uses scaling factors W=1, X=sqrt(2), Y=sqrt(2), and Z=sqrt(2), which is +3dB louder than FuMa. The base factors are designed assuming classic scaling, so encoding a 0dBFS FuMa signal without accounting for this would result in the UHJ signal peaking at about -3dBFS. Similarly, decoding UHJ to FuMa B-Format would be +3dB louder than intended. So encoding needs to implicitly boost the signal by +3dB, and decoding needs to attenuate by -3dB.
* Remove some unnecessary includesChris Robinson2021-03-281-6/+0
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* Move the UHJ phase shifter to a common headerChris Robinson2021-03-281-196/+31
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* Add an option to change the UHJ decoder methodChris Robinson2021-03-261-27/+50
| | | | | | | | | | | | For 2-channel UHJ, two decoding equations are provided in the original paper. The alternative one is most often referenced for 2-channel UHJ decoding, but the original/general one can also be used by assuming T is fully attenuated (which the format allows for, as T can be variably attenuated by a factor between 0 and 1 to deal with an imperfect transmission medium). Neither method can be perfect for 2-channel UHJ, it's irrevocably lossy to the original source, but my subjective testing indicates the general equation produces less audibly errant results.
* Fix a comment typoChris Robinson2021-03-241-2/+2
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* Update the UHJ decoding coefficientsChris Robinson2021-03-241-60/+66
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* Add support for decoding 3- and 4-channel UHJ audioChris Robinson2021-03-211-32/+185
| | | | | | | There are no known file formats intended to support 3- and 4-channel UHJ, but it is possible to store them in various audio files when a player/decoder is aware of what it's dealing with. So there's no reason not to have it as an option.
* Don't assume two input channels in uhjdecoderChris Robinson2021-03-211-1/+1
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* Add a utility to decode UHJ sound files to AMBChris Robinson2021-03-211-0/+515
| | | | | | Currently only supports 2-channel UHJ, and the produced .amb files shouldn't be played as normal B-Format (decoded 2-channel UHJ needs to use different shelf filters).
* Add missing includeChris Robinson2021-02-161-0/+1
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* Avoid a deprecated functionChris Robinson2020-11-131-10/+10
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* Print the number of used measurements in sofa-infoChris Robinson2020-10-071-1/+9
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* Avoid using a deprecated functionChris Robinson2020-08-311-4/+3
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* Avoid allocating for each HRIR reconstructionChris Robinson2020-08-141-9/+9
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* Simplify StrSubst in makemhrChris Robinson2020-08-131-36/+27
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* Improve handling main() with UTF-8 args on WindowsChris Robinson2020-08-123-5/+4
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* Add the jack/connect-ports option to alsoft-configChris Robinson2020-08-052-1/+20
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* Apply simulated HRIR occlusion in the frequency domainChris Robinson2020-06-211-50/+59
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* Synthesize missing elevations in the frequency domainChris Robinson2020-06-211-141/+147
| | | | | | This should help avoid destructive phase interference. The occlusion low-pass filter is still applied in the time domain due to no clear topology (cutoff frequency, slope, bandwidth, etc).
* Use multiple threads for magnitude calculationsChris Robinson2020-06-193-46/+107
| | | | Also allow user-declarable thread count.
* Avoid blending multiple IRs for the -90 elevation IRChris Robinson2020-06-191-33/+27
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* Calculate the HRIR onsets and magnitudes separately from loadingChris Robinson2020-06-171-21/+82
| | | | | This should help improve memory use a bit since the SOFA file can be unloaded before allocating some temp buffers for onset detection and FFT calculation.
* Add a makemhr option to use the farthest field onlyChris Robinson2020-06-171-8/+30
| | | | | All fields are used for equalization, but only the farthest field is resampled, reconstructed, normalized, and written to the mhr.
* Resample HRIRs after equalizationChris Robinson2020-06-171-93/+93
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* Avoid reinitializing the resampler with each HRIRChris Robinson2020-06-171-10/+11
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* Resample HRTFs in the frequency domain in makemhrChris Robinson2020-06-171-29/+93
| | | | | | | | | | | | This should produce far better results given it works directly on the frequency response magnitudes prior to phase reconstruction, as it doesn't deal with a linear phase filter on a truncated time-domain response (with the result also getting truncated in both direction). The in-library on-load HRTF resampler still uses the linear filter due to its relative performance and simplicity benefits. It's good enough as a backup, though users with custom HRTFs would benefit from resampling when creating the mhr (adjusting its window size as appropriate/desired).
* Print the synthesized elevations' azimuth countsChris Robinson2020-06-161-2/+4
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* Print why a sofa file couldn't be openedChris Robinson2020-05-211-1/+2
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* Fix installing alsoft-configChris Robinson2020-04-151-1/+9
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* Combine utility target installsChris Robinson2020-04-141-7/+0
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* Add missing <cstdarg>ArthurSonzogni2020-04-102-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | OpenAL-Soft fails to compile on some GCC version: https://travis-ci.com/github/ArthurSonzogni/smk/jobs/318304162 It has regressed likely after: https://github.com/kcat/openal-soft/commit/c83609277bed4be4ef40ed306bf2c57fefa19519 va_start is defined in: - <stdarg.h> - <cstdarg> The repository is using it from: - al/error.cpp - al/filter.cpp - alc/alu.cpp - alc/helpers.cpp - common/alexcpt.cpp - utils/makemhr/loaddef.cpp - utils/openal-info.c This patch is adding its definition in the files missing it: - common/alexcpt.cpp - utils/makemhr/loaddef.cpp - utils/openal-info.c Bug: https://travis-ci.com/github/ArthurSonzogni/smk/jobs/318304162
* Require Qt5 for alsoft-configChris Robinson2020-04-051-49/+17
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* Update the makemhr utility and default HRTFChris Robinson2020-02-111-17/+13
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* Scale delays when exceeding the max for generated mhr filesChris Robinson2020-02-101-15/+35
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* Use the peak IR magnitude to get the onsetChris Robinson2020-01-252-19/+7
| | | | | | | | | | | | While maybe not technically correct, we actually only care about the difference between onsets (any base constant is removed). This should work better since it determines when the IR is most audible, whereas previously it used a variable threshold of when it reached 15% of the max amplitude. An even better method may be to check where the IR amplitude exceeds a fixed threshold (i.e. the same threshold applied to all IRs), but that would need tweaking to find a level that doesn't catch random noise and doesn't potentially miss the more occluded IRs.
* Fix MHR limitsChris Robinson2019-12-111-7/+3
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* Move duplicate SOFA-related functions to a reusable libraryChris Robinson2019-12-114-510/+342
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* Simplify a status-checking loopChris Robinson2019-12-101-7/+6
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* Simplify a couple assignmentsChris Robinson2019-12-092-10/+6
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* Simplify a checkChris Robinson2019-12-082-2/+2
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* Load SOFA HRIRs in a background threadChris Robinson2019-12-081-63/+79
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* Report the non-uniform elevations in sofa-infoChris Robinson2019-12-082-29/+46
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* Report the number of IRs used from SOFA filesChris Robinson2019-12-081-2/+9
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* Simplify some parametersChris Robinson2019-12-082-59/+49
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* Improve detection of compatible layouts in SOFA filesChris Robinson2019-12-082-255/+279
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* Update built-in HRTF name for alsoft-configChris Robinson2019-11-291-2/+1
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* Move the polyphase resampler to the common libChris Robinson2019-11-284-250/+11
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* Properly get the AppData path on Windows in alsoft-configChris Robinson2019-11-201-2/+21
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