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91 lines
4.2 KiB
91 lines
4.2 KiB
Useful Environment Variables
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Below is a list of environment variables that can be set to aid with running or
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debugging apps that use OpenAL Soft. They should be set before the app is run.
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*** Logging ***
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ALSOFT_LOGLEVEL
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Specifies the amount of logging OpenAL Soft will write out:
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0 - Effectively disables all logging
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1 - Prints out errors only
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2 - Prints out warnings and errors
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3 - Prints out additional information, as well as warnings and errors
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4 - Same as 3, but also device and context reference count changes. This will
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print out *a lot* of info, and is generally not useful unless you're trying
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to track a reference leak within the library.
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ALSOFT_LOGFILE
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Specifies a filename that logged output will be written to. Note that the file
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will be first cleared when logging is initialized.
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*** Overrides ***
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ALSOFT_CONF
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Specifies an additional configuration file to load settings from. These
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settings will take precedence over the global and user configs, but not other
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environment variable settings.
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ALSOFT_DRIVERS
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Overrides the drivers config option. This specifies which backend drivers to
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consider or not consider for use. Please see the drivers option in
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alsoftrc.sample for a list of available drivers.
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ALSOFT_DEFAULT_REVERB
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Specifies the default reverb preset to apply to sources. Please see the
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default-reverb option in alsoftrc.sample for additional information and a list
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of available presets.
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ALSOFT_TRAP_AL_ERROR
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Set to "true" or "1" to force trapping AL errors. Like the trap-al-error config
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option, this will raise a SIGTRAP signal (or a breakpoint exception under
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Windows) when a context-level error is generated. Useful when run under a
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debugger as it will break execution right when the error occurs, making it
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easier to track the cause.
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ALSOFT_TRAP_ALC_ERROR
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Set to "true" or "1" to force trapping ALC errors. Like the trap-alc-error
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config option, this will raise a SIGTRAP signal (or a breakpoint exception
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under Windows) when a device-level error is generated. Useful when run under a
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debugger as it will break execution right when the error occurs, making it
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easier to track the cause.
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ALSOFT_TRAP_ERROR
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Set to "true" or "1" to force trapping both ALC and AL errors.
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*** Compatibility ***
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__ALSOFT_HALF_ANGLE_CONES
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Older versions of OpenAL Soft incorrectly calculated the cone angles to range
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between 0 and 180 degrees, instead of the expected range of 0 to 360 degrees.
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Setting this to "true" or "1" restores the old buggy behavior, for apps that
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were written to expect the incorrect range.
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__ALSOFT_REVERSE_Z
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Applications that don't natively use OpenAL's coordinate system have to convert
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to it before passing in 3D coordinates. Depending on how exactly this is done,
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it can cause correct output for stereo but incorrect Z panning for surround
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sound (i.e., sounds that are supposed to be behind you sound like they're in
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front, and vice-versa). Setting this to "true" or "1" will negate the localized
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Z coordinate to attempt to fix output for apps that have incorrect front/back
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panning.
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__ALSOFT_SUSPEND_CONTEXT
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Due to the OpenAL spec not being very clear about them, behavior of the
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alcSuspendContext and alcProcessContext methods has varied, and because of
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that, previous versions of OpenAL Soft had them no-op. Creative's hardware
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drivers and the Rapture3D driver, however, use these methods to batch changes,
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which some applications make use of to protect against partial updates. In an
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attempt to standardize on that behavior, OpenAL Soft has changed those methods
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accordingly. Setting this to "ignore" restores the previous no-op behavior for
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applications that interact poorly with the new behavior.
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__ALSOFT_REVERB_IGNORES_SOUND_SPEED
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Older versions of OpenAL Soft ignored the app-specified speed of sound when
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calculating distance-related reverb decays and always assumed the default
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343.3m/s. Now, both of the AL_SPEED_OF_SOUND and AL_METERS_PER_UNIT properties
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are taken into account for speed of sound adjustments to have an appropriate
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affect on the reverb decay. Consequently, applications that use reverb but
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don't set these properties properly may find the reverb decay too strong.
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Setting this to "true" or "1" will revert to the old behavior for those apps
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and assume the default speed of sound for reverb.
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