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/*
* PortAudio Portable Real-Time Audio Library
* Macintosh Core Audio specific extensions
* portaudio.h should be included before this file.
*
* Copyright (c) 2005-2006 Bjorn Roche
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* The text above constitutes the entire PortAudio license; however,
* the PortAudio community also makes the following non-binding requests:
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version. It is also
* requested that these non-binding requests be included along with the
* license above.
*/
#ifdef __cplusplus
extern "C" {
#endif
/*
* A pointer to a paMacCoreStreamInfo may be passed as
* the hostApiSpecificStreamInfo in the PaStreamParameters struct
* when opening a stream or querying the format. Use NULL, for the
* defaults. Note that for duplex streams, both infos should be the
* same or behaviour is undefined.
*/
typedef struct paMacCoreStreamInfo
{
unsigned long size; /**size of whole structure including this header */
PaHostApiTypeId hostApiType;/**host API for which this data is intended */
unsigned long version; /**structure version */
unsigned long flags; /* flags to modify behaviour */
} paMacCoreStreamInfo;
/* MK: Disabled function body here in PsychPortAudio's private version of pa_mac_core.h
* to avoid conflicting duplicate declaration of this function and symbols in
* PsychPortAudio.o and the Portaudio library. However, we need to keep/define the
* function prototype to avoid compiler warnings.
*/
/* Use this function to initialize a paMacCoreStreamInfo struct using the requested flags. */
void paSetupMacCoreStreamInfo( paMacCoreStreamInfo *data, unsigned long flags );
/*
{
bzero( data, sizeof( paMacCoreStreamInfo ) );
data->size = sizeof( paMacCoreStreamInfo );
data->hostApiType = paCoreAudio;
data->version = 0x01;
data->flags = flags;
}
*/
/*
* The following flags alter the behaviour of PA on the mac platform.
* they can be ORed together. These should work both for opening and
* checking a device.
*/
/* Allows PortAudio to change things like the device's frame size,
* which allows for much lower latency, but might disrupt the device
* if other programs are using it, even when you are just Querying
* the device. */
#define paMacCore_ChangeDeviceParameters 0x01
/* In combination with the above flag,
* causes the stream opening to fail, unless the exact sample rates
* are supported by the device. */
#define paMacCore_FailIfConversionRequired 0x02
/* These flags set the SR conversion quality, if required. The wierd ordering
* allows Maximum Quality to be the default.*/
#define paMacCore_ConversionQualityMin 0x0100
#define paMacCore_ConversionQualityMedium 0x0200
#define paMacCore_ConversionQualityLow 0x0300
#define paMacCore_ConversionQualityHigh 0x0400
#define paMacCore_ConversionQualityMax 0x0000
/*
* Here are some "preset" combinations of flags (above) to get to some
* common configurations. THIS IS OVERKILL, but if more flags are added
* it won't be.
*/
/*This is the default setting: do as much sample rate conversion as possible
* and as little mucking with the device as possible. */
#define paMacCorePlayNice 0x00
/*This setting is tuned for pro audio apps. It allows SR conversion on input
and output, but it tries to set the appropriate SR on the device.*/
#define paMacCorePro 0x01
/*This is a setting to minimize CPU usage and still play nice.*/
#define paMacCoreMinimizeCPUButPlayNice 0x0100
/*This is a setting to minimize CPU usage, even if that means interrupting the device. */
#define paMacCoreMinimizeCPU 0x0101
#ifdef __cplusplus
}
#endif /* __cplusplus */
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