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* Add an option for "basic" HRTF renderingChris Robinson2015-02-113-9/+36
| | | | | | | | | | | | | | | | | 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.
* Calculate HRTF coefficients for all B-Format channels at onceChris Robinson2015-02-103-34/+72
| | | | | | It's possible to calculate HRTF coefficients for full third-order ambisonics now, but it's still not possible to use them here without upmixing first-order content.
* Use a single statement to declare the buffer format channel mapsChris Robinson2015-02-101-14/+9
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* Pass the (FuMa) channel number to GetBFormatHrtfCoeffsChris Robinson2015-02-103-10/+10
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* Correct conversion from polar to cartesian coords for HRTFChris Robinson2015-02-101-3/+3
| | | | | A functional no-op (cos(a) == cos(-a), -sin(a) == sin(-a)), but Ambisonics expects the azimuth angle to go counter-clockwise.
* Use B-Format for HRTF's virtual output formatChris Robinson2015-02-094-33/+97
| | | | | | | | 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 Robinson2015-02-095-17/+19
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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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* Make sure the BS2B filter is freed if HRTF is enabledChris Robinson2015-02-091-0/+4
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* Move HRTF params and state closer togetherChris Robinson2015-02-094-18/+18
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* Add a note to the JACK backend about a (minor) race conditionChris Robinson2015-02-071-0/+14
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* Fix some ringbuffer function commentsChris Robinson2015-02-071-4/+4
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* Clean up another vector iterator loopChris Robinson2015-02-071-12/+12
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* Avoid tracing wide-char stringsChris Robinson2015-02-072-27/+43
| | | | | | Because on Windows, traced strings are written to a char string, which causes UTF-16 strings to be converted to a narrow (non-UTF-8) encoding, potentially losing characters.
* Avoid unnecessary uses of ExchangeInt/PtrChris Robinson2015-02-044-15/+23
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* Avoid unnecessary ExchangeInt usesChris Robinson2015-02-041-2/+2
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* Try the JACK backend before PulseAudioChris Robinson2015-02-031-3/+3
| | | | | The backend will not spawn a server by default, so PulseAudio will still be preferred as long as a JACK server isn't already running.
* Signal the mixer thread outside of the mutex lockChris Robinson2015-02-031-1/+5
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* Don't try to spawn a JACK server by defaultChris Robinson2015-02-031-6/+6
| | | | And don't print an error if one couldn't be started when not requested.
* Always use the JACK server buffer size as the update sizeChris Robinson2015-02-031-12/+15
| | | | | The buffer-size config option now only specifies an additional mix ahead to keep ready for audio requests, rather than a pretend period size.
* Ensure PulseAudio's mixing loop is signaled when stoppingChris Robinson2015-01-211-0/+8
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* Remove a couple unused variablesChris Robinson2015-01-201-3/+0
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* Fix variable checkChris Robinson2015-01-201-1/+1
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* Fix X7DOT1_NARROW name to X7DOT1_WIDEChris Robinson2015-01-151-3/+3
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* Accept a "narrow" layout for 7.1 with mmdevapiChris Robinson2015-01-151-2/+3
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* Fix high-pass coefficientsChris Robinson2015-01-131-6/+6
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* Add missing alignas to CubicLUT declarationChris Robinson2015-01-131-1/+1
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* Fix the flags typeChris Robinson2015-01-111-1/+2
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* Remove some IN_IDE_PARSER usesChris Robinson2014-12-244-18/+4
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* Remove some unnecessary restrict usesChris Robinson2014-12-241-7/+6
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* Update some function comments (bytes -> elements)Chris Robinson2014-12-241-7/+8
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* Update a commentChris Robinson2014-12-241-2/+2
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* Don't update the channel format if all JACK ports were allocatedChris Robinson2014-12-231-9/+11
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* Try the device-specified channel configuration firstChris Robinson2014-12-231-3/+15
| | | | | This does basically no checking that the channel config is correct, but should be good enough for when non-stereo modes are requested.
* Use the custom ringbuffer instead of JACK'sChris Robinson2014-12-231-41/+20
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* Add a lockless ringbufferChris Robinson2014-12-232-0/+290
| | | | | | Largely copied from JACK, it's extended to work with user-specified element sizes instead of bytes. This is necessary to be able to work with 6- and 7- channel output modes.
* Don't set unused pointers to NULL, don't try to write 0 samplesChris Robinson2014-12-231-7/+8
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* At least measure the ringbuffer size for JACK's latencyChris Robinson2014-12-231-1/+17
| | | | | | We should also add the port latency, but there's currently no way to ensure it's synchronized with the ringbuffer (the ringbuffer will update before the port latency gets updated).
* Add an option to prevent spawning a JACK serverChris Robinson2014-12-222-2/+11
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* Add JACK to the config utilityChris Robinson2014-12-221-0/+1
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* Add an option for an increased ringbuffer size with JACKChris Robinson2014-12-222-2/+24
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* Fill out the JACK playback backendChris Robinson2014-12-221-15/+326
| | | | | | | | | | | | | | | | | | | | | | | | A few notes about it: The OpenAL device's requested buffer metrics are ignored, and instead the device will keep one JACK-sized buffer's worth of audio prepared for JACK's next process request. Output is restricted to 32-bit float stereo. Part of this is because JACK requires a buffer size that's a power of 2 (measured in samples), and the ringbuffer requires a buffer size that's a power of 2 (measured in bytes). A channel count of 6 (5.1) or 7 (6.1) will not work without causing a sample to split over the edge of the ringbuffer. Additioanlly, JACK doesn't provide information about what channel configuration a device or set of ports has, so there's no way to know what ports 3 and up map to (even the first two ports are unknown, but assuming stereo seems to work well enough). There is no device latency measurement (for AL_SOFT_source_latency) due to the non-atomicity between the ringbuffer's read size and port latency. A method is needed to ensure the ringbuffer's read size and port latency can both be measured between the end of a JACK update cycle (when the port latency has been updated with the newly-retrieved audio) and the following ringbuffer read update.
* Add a skeleton backend for JACKChris Robinson2014-12-215-0/+290
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* Add a cmake module to find JACKChris Robinson2014-12-211-0/+60
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* Set error if capture device fails to startChris Robinson2014-12-211-4/+10
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* Trace lparam and wparam message valuesChris Robinson2014-12-211-1/+1
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* Check the PROPVARIANT type before useChris Robinson2014-12-211-2/+8
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* Use VECTOR_FOR_EACH instead of a manual loopChris Robinson2014-12-211-9/+7
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* Use a macro for the record thread nameChris Robinson2014-12-214-3/+5
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* Cast to the pointer-to-type to increment the bufferChris Robinson2014-12-211-1/+1
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