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* Use an 8-channel cube for HRTF's virtual format.Chris Robinson2016-02-201-7/+7
| | | | | | There were phase issues caused by applying HRTF directly to the B-Format channels, since the HRIR delays were all averaged which removed the inter-aural time-delay, which in turn removed significant spatial information.
* Calculate HRTF stepping params right before mixingChris Robinson2016-02-141-76/+17
| | | | | This means we track the current params and the target params, rather than the target params and the stepping. This closer matches the non-HRTF mixers.
* Calculate channel gain stepping just before mixingChris Robinson2016-02-141-224/+58
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* Rename ComputeBFormatGains to ComputeFirstOrderGainsChris Robinson2016-01-311-3/+3
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* Properly silence the LFE input channel gain on the source sendsChris Robinson2016-01-301-0/+8
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* Fix scaling for effect sends of B-Format sourcesChris Robinson2016-01-301-1/+10
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* Mix to multichannel for effectsChris Robinson2016-01-281-55/+235
| | | | | | This mixes to a 4-channel first-order ambisonics buffer. With ACN ordering and N3D scaling, this makes it easy to remain compatible with effects that only care about mono input since channel 0 is an unattenuated mono signal.
* Pass a pointer to the input samples array for effect processingChris Robinson2016-01-271-9/+15
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* Separate calculating ambisonic coefficients from the panning gainsChris Robinson2016-01-251-5/+11
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* Use doubles for the constructed listener matrixChris Robinson2015-11-111-40/+82
| | | | | | This helps the stability of transforms to local space for sources that are at or near the listener. With a single-precision matrix, even FLT_EPSILON might not be enough to detect matching positions.
* Update the bsinc tableChris Robinson2015-11-101-3/+5
| | | | Precision is increased to cover the full 32-bit float range.
* Remove a const to silence some warningsChris Robinson2015-11-061-1/+1
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* Use more accurate floating point literalsChris Robinson2015-11-061-6/+6
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* Implement a band-limited sinc resamplerChris Robinson2015-11-051-0/+74
| | | | | | | | This is essentially a 12-point sinc resampler, unless it's resampling to a rate higher than the output, at which point it will vary between 12 and 24 points and do anti-aliasing to avoid/reduce frequencies going over nyquist. Code provided by Christopher Fitzgerald.
* Pass in the Q parameter for setting the filter parametersChris Robinson2015-11-011-16/+24
| | | | Also better handle the peaking filter gain.
* Set the current gain immediately if the target is close enoughChris Robinson2015-10-261-2/+8
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* Set XYZ channel gains for source sends to 0Chris Robinson2015-10-231-80/+107
| | | | | It's cleaner to just set the gains to 0 rather than to special-case B-Format in the mixer.
* Use one send gain per buffer channelChris Robinson2015-10-231-11/+16
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* Return the new vector result from aluMatrixVectorChris Robinson2015-10-221-14/+12
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* Remove the MIDI codeChris Robinson2015-10-201-3/+0
| | | | | | | The extension's not going anywhere, and it can't do anything fluidsynth can't. The code maintenance and bloat is not worth keeping around, and ideally the AL API would be able to facilitate MIDI-like behavior anyway (envelopes, start-at- time, etc).
* Round the calculated stepping valueChris Robinson2015-10-151-10/+2
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* Replace the resample_fir6 declaration with resample_fir8Chris Robinson2015-10-121-1/+1
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* Implement a 6-point sinc-lanczos filterChris Robinson2015-09-291-0/+1
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* Fix resample_fir4 link errorAaron Jacobs2015-09-291-1/+1
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* Increase the max pitch to 255Chris Robinson2015-09-261-3/+0
| | | | | | | Note that this is the multiple above the device sample rate, rather than the source property limit. It could theoretically be increased to 511 by testing against UINT_MAX instead of INT_MAX, since the increment and positions are using unsigned integers. I'm just being paranoid about overflows.
* Remove unneeded clampingChris Robinson2015-09-241-24/+16
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* Use N3D scaling instead of FuMaChris Robinson2015-09-231-7/+7
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* Fix updating listener params when forcing updatesChris Robinson2015-09-181-32/+40
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* Update properties and clear wet buffers before mixing/processingChris Robinson2015-09-131-52/+69
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* Explicitly convert to int in the aluF2I/S/B functionsChris Robinson2015-09-071-9/+16
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* Use ACN ordering for ambisonics coefficients arraysChris Robinson2015-08-281-4/+8
| | | | | | Note that it still uses FuMa scalings internally. Coefficients loaded from config files specify if they're FuMa (in both ordering and scaling) or N3D, and will get reordered or rescaled as needed.
* Avoid temporary vector objectsChris Robinson2015-08-241-9/+13
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* Revert "Fix B-Format rotation"Chris Robinson2015-08-241-3/+3
| | | | | | | This reverts commit 7ffb9b3056ab280d5d9408fd023f3cfb370ed103. It was behaving as appropriate before (orienting left did pan it left for the listener), I was apparently just misinterpreting the matrix.
* Fix B-Format rotationChris Robinson2015-08-231-3/+3
| | | | | | | The rotation erroneously specified the orientation of the source relative to the sound field, whereas it should be the orientation of the sound field *and* source relative to the listener. So now when the source is oriented left, the front of the sound field is to the left of the listener.
* Change source radius behaviorChris Robinson2015-07-051-19/+33
| | | | | | | | | For sources with a non-0 radius: When distance <= radius, factor = distance/radius*0.5 When distance > radius, factor = 1 - asinf(radius/distance)/PI Also, avoid using Position after calculating the localized direction and distance.
* Update a couple commentsChris Robinson2015-07-041-3/+4
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* Add an option for "basic" HRTF renderingChris Robinson2015-02-111-2/+2
| | | | | | | | | | | | | | | | | This method is intended to help development by easily testing the quality of the B-Format encode and B-Format-to-HRTF decode. When used with HRTF, all sources are renderer using the virtual B-Format output, rather than just B-Format sources. Despite the CPU cost savings (only four channels need to be filtered with HRTF, while sources all render normally), the spatial acuity offered by the B-Format output is pretty poor since it's only first-order ambisonics, so "full" HRTF rendering is definitely preferred. It's /possible/ for some systems to be edge cases that prefer the CPU cost savings provided by basic over the sharper localization provided by full, and you do still get 3D positional cues, but this is unlikely to be an actual use- case in practice.
* Use a single statement to declare the buffer format channel mapsChris Robinson2015-02-101-14/+9
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* Use B-Format for HRTF's virtual output formatChris Robinson2015-02-091-4/+4
| | | | | | | | This adds the ability to directly decode B-Format with HRTF, though only first- order (WXYZ) for now. Second- and third-order would be easilly doable, however we'd need to be able to up-mix first-order content (from the BFORMAT2D and BFORMAT3D buffer formats) since it would be inappropriate to decode lower-order content with a higher-order decoder.
* Properly handle a mono output buffer with the MIDI synthsChris Robinson2015-02-091-1/+1
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* Add a comment detailing how the HRTF channel buffer is set upChris Robinson2015-02-091-19/+45
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* Move HRTF params and state closer togetherChris Robinson2015-02-091-10/+10
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* Cast to the pointer-to-type to increment the bufferChris Robinson2014-12-211-1/+1
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* Avoid duplicate calculationsChris Robinson2014-12-181-4/+4
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* Use aluVector and aluMatrix in a couple more placesChris Robinson2014-12-161-45/+30
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* Pass a vectory to aluMatrixVectorChris Robinson2014-12-161-20/+23
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* Use aluVector in some more placesChris Robinson2014-12-161-37/+30
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* Add explicit matrix and vector types to operate withChris Robinson2014-12-161-40/+37
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* Use a lookup table to do cubic resamplingChris Robinson2014-12-151-1/+1
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* Don't pass float literals for unsigned intsChris Robinson2014-12-061-2/+2
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