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35c4a904c2
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/trunk@247 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
71 lines
2.9 KiB
C
71 lines
2.9 KiB
C
/*
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* Mac spcific flags for PA.
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* portaudio.h should be included before this file.
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*/
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/*
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* A pointer to a paMacCoreStreamInfo may be passed as
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* the hostApiSpecificStreamInfo in the PaStreamParameters struct
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* when opening a stream or querying the format. Use NULL, for the
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* defaults. Note that for duplex streams, both infos should be the
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* same or behaviour is undefined.
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*/
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typedef struct paMacCoreStreamInfo
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{
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unsigned long size; /**size of whole structure including this header */
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PaHostApiTypeId hostApiType;/**host API for which this data is intended */
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unsigned long version; /**structure version */
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unsigned long flags; /* flags to modify behaviour */
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} paMacCoreStreamInfo;
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/* Use this function to initialize a paMacCoreStreamInfo struct
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using the requested flags. */
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void paSetupMacCoreStreamInfo( paMacCoreStreamInfo *data, unsigned long flags )
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{
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bzero( data, sizeof( paMacCoreStreamInfo ) );
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data->size = sizeof( paMacCoreStreamInfo );
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data->hostApiType = paCoreAudio;
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data->version = 0x01;
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data->flags = flags;
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}
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/*
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* The following flags alter the behaviour of PA on the mac platform.
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* they can be ORed together. These should work both for opening and
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* checking a device.
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*/
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/* Allows PortAudio to change things like the device's frame size,
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* which allows for much lower latency, but might disrupt the device
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* if other programs are using it, even when you are just Querying
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* the device. */
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const unsigned long paMacCore_ChangeDeviceParameters = 0x01;
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/* In combination with the above flag,
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* causes the stream opening to fail, unless the exact sample rates
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* are supported by the device. */
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const unsigned long paMacCore_FailIfConversionRequired = 0x02;
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/* These flags set the SR conversion quality, if required. The wierd ordering
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* allows Maximum Quality to be the default.*/
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const unsigned long paMacCore_ConversionQualityMin = 0x0100;
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const unsigned long paMacCore_ConversionQualityMedium = 0x0200;
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const unsigned long paMacCore_ConversionQualityLow = 0x0300;
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const unsigned long paMacCore_ConversionQualityHigh = 0x0400;
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const unsigned long paMacCore_ConversionQualityMax = 0x0000;
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/*
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* Here are some "preset" combinations of flags (above) to get to some
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* common configurations. THIS IS OVERKILL, but if more flags are added
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* it won't be.
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*/
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/*This is the default setting: do as much sample rate conversion as possible
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* and as little mucking with the device as possible. */
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const unsigned long paMacCorePlayNice = 0x00;
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/*This setting is tuned for pro audio apps. It allows SR conversion on input
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and output, but it tries to set the appropriate SR on the device.*/
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const unsigned long paMacCorePro = 0x01;
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/*This is a setting to minimize CPU usage and still play nice.*/
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const unsigned long paMacCoreMinimizeCPUButPlayNice = 0x0100;
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/*This is a setting to minimize CPU usage, even if that means interrupting the device. */
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const unsigned long paMacCoreMinimizeCPU = 0x0101;
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