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63 lines
2.1 KiB
Text
63 lines
2.1 KiB
Text
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afSetVirtualSampleFormat(3)
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===========================
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NAME
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----
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afSetVirtualByteOrder, afSetVirtualChannels, afSetVirtualPCMMapping,
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afSetVirtualSampleFormat - set the virtual data format for a track in
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an audio file
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SYNOPSIS
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--------
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#include <audiofile.h>
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int afSetVirtualByteOrder (AFfilehandle file, int track, int byteOrder);
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int afSetVirtualChannels (AFfilehandle file, int track, int channels);
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int afSetVirtualSampleFormat (AFfilehandle file, int track,
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int sampleFormat, int sampleWidth);
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int afSetVirtualPCMMapping (AFfilehandle file, int track,
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double slope, double intercept, double minclip, double maxclip);
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PARAMETERS
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----------
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* 'file' is an AFfilehandle which refers to an open audio file and is
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usually created by afOpenFile.
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* 'track' is an integer which identifies a particular track in an open
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audio file. The only valid track is `AF_DEFAULT_TRACK` for all
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currently supported file formats.
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* 'sampleFormat' is an integer which denotes a virtual sample format.
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Valid values are `AF_SAMPFMT_TWOSCOMP`, `AF_SAMPFMT_UNSIGNED`,
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`AF_SAMPFMT_FLOAT`, and `AF_SAMPFMT_DOUBLE`.
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* 'sampleWidth' is a positive integer which specifies the number of bits
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in a sample.
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* 'channels' is a positive integer which specifies the number of
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interleaved audio channels in the given audio track.
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* 'byteOrder' is an integer which specifies the virtual byte order of
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samples in the given audio track. 'byteOrder' can be either
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`AF_BYTEORDER_BIGENDIAN` or `AF_BYTEORDER_LITTLEENDIAN`.
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* 'slope' and 'intercept' are double-precision floating point values which
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indicate the audio data sample slope and zero-crossing value,
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respectively, for the given sample format.
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* 'minclip' and 'maxclip' are double-precision floating point values
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which indicates the minimum or maximum sample values to be returned.
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Any values less than 'minclip' will be set to 'minclip', and any values
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greater than 'maxclip' will be set to 'maxclip'.
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RETURN VALUE
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------------
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These functions return 0 for success and -1 for failure.
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AUTHOR
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------
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Michael Pruett <michael@68k.org>
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