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#ifndef PA_WIN_WMME_H
#define PA_WIN_WMME_H
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
/*
*
* PortAudio Portable Real-Time Audio Library
* MME specific extensions
*
* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
*
* 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.
*
* 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.
*
* 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.
*
*/
#include "portaudio.h"
#define PaWinMmeUseLowLevelLatencyParameters (0x01)
#define PaWinMmeUseMultipleDevices (0x02) /* use mme specific multiple device feature */
/* by default, the mme implementation boosts the process priority class to
HIGH_PRIORITY_CLASS. This flag disables that priority boost */
#define PaWinMmeNoHighPriorityProcessClass (0x03)
/* by default, the mme implementation drops the processing thread's priority
to THREAD_PRIORITY_NORMAL and sleeps the thread if the CPU load exceeds 100% */
#define PaWinMmeDontThrottleOverloadedProcessingThread (0x04)
/* by default, the mme implementation sets the processing thread's priority to
THREAD_PRIORITY_HIGHEST. This flag sets the priority to
THREAD_PRIORITY_TIME_CRITICAL instead. Note that this has the potential
to freeze the machine, especially when used in combination with
PaWinMmeDontThrottleOverloadedProcessingThread */
#define PaWinMmeUseTimeCriticalThreadPriority (0x05)
typedef struct PaWinMmeDeviceAndChannelCount{
PaDeviceIndex device;
int channelCount;
}PaWinMmeDeviceAndChannelCount;
typedef struct PaWinMmeStreamInfo{
unsigned long size; /* sizeof(PaWinMmeStreamInfo) */
PaHostApiTypeId hostApiType; /* paMME */
unsigned long version; /* 1 */
unsigned long flags;
/* low-level latency setting support
These settings control the number and size of host buffers in order
to set latency. They will be used instead of the generic parameters
to Pa_OpenStream() if flags contains the PaWinMmeUseLowLevelLatencyParameters
flag.
*/
unsigned long framesPerBuffer;
unsigned long numBuffers;
/* multiple devices per direction support
If flags contains the PaWinMmeUseMultipleDevices flag,
this functionality will be used, otherwise the device parameter to
Pa_OpenStream() will be used instead.
If devices are specified here, the corresponding device parameter
to Pa_OpenStream() should be set to paUseHostApiSpecificDeviceSpecification,
otherwise an paInvalidDevice error will result.
The total number of channels accross all specified devices
must agree with the corresponding channelCount parameter to
Pa_OpenStream() otherwise a paInvalidChannelCount error will result.
*/
PaWinMmeDeviceAndChannelCount *devices;
unsigned long deviceCount;
}PaWinMmeStreamInfo;
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PA_WIN_WMME_H */
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