ALgetfloatmax(3dm)                                          ALgetfloatmax(3dm)



NAME
     ALgetfloatmax, ALsetfloatmax - (obsolete) get/set the maximum value of
     floating point sample data.

SYNOPSIS
     #include <dmedia/audio.h>

     double ALgetfloatmax(ALconfig config)
     int ALsetfloatmax(ALconfig config, double maximumvalue)

PARAMETER
     config          expects an ALconfig structure, the returned value of a
                     call to ALnewconfig(3dm) or ALgetconfig(3dm).

     maximum_value   expects an IEEE double precision floating point value
                     which defines the range of the floating point data for
                     the ALreadsamps(3dm) or ALwritesamps(3dm) functions.

DESCRIPTION
     ALsetfloatmax and ALgetfloatmax are obsolete and provided for backward
     compatibility. The preferred functions are alSetFloatMax(3dm) and
     alGetFloatMax(3dm).

     ALsetfloatmax(3dm) simultaneously sets the upper and lower bounds of the
     data read from a port with the ALreadsamps(3dm) function or written with
     the ALwritesamps(3dm) function.

     The data transferred into a program with ALreadsamps(3dm) will be scaled
     to the range (-maximum_value, maximum_value), where the maximum value of
     the input data (32767 in the case of 16-bit analog input) will correspond
     to maximum_value.  Likewise, the value -32768 will correspond to
     -maximum_value in this case.

     Data output with ALwritesamps(3dm) should fall in the range (-
     maximum_value, maximum_value) to avoid limiting.

     ALsetfloatmax(3dm) is only meaningful when the sample format for config
     is set to ALSAMPFMTFLOAT or ALSAMPFMTDOUBLE.  See ALsetsampfmt(3dm)
     for more details regarding setting the sample data format.

     ALsetfloatmax(3dm) can fail for the following reasons:

     ALBADCONFIG     config is invalid or null.

     ALBADFLOATMAX   maximum_value is zero.

     ALgetfloatmax(3dm) returns the current double precision value of the
     bounds in ALconfig structure config.

     ALgetfloatmax(3dm) can fail for the following reason:





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ALgetfloatmax(3dm)                                          ALgetfloatmax(3dm)



     ALBADCONFIG   config is invalid or null.

DIAGNOSTICS
     Upon successful completion, ALsetfloatmax(3dm) returns 0. Otherwise,
     ALsetfloatmax(3dm) returns -1 and sets an error number which can be
     retrieved with oserror(3C).

     ALgetfloatmax(3dm) returns 0 in the case of failure and sets an error
     number which can be retrieved with oserror(3C). When successful,
     ALgetfloatmax(3dm) returns a non-zero value.

SEE ALSO
     ALnewconfig(3dm), ALgetconfig(3dm), ALopenport(3dm), ALsetconfig(3dm),
     ALsetsampfmt(3dm), oserror(3C)









































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