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#ifndef PA_STREAM_H
#define PA_STREAM_H
/*
* $Id: pa_stream.h,v 1.1.2.9 2002/12/03 06:30:40 rossbencina Exp $
* Portable Audio I/O Library
* stream interface
*
* Based on the Open Source API proposed by Ross Bencina
* Copyright (c) 1999-2002 Ross Bencina, 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.
*/
/** @file
Interface used by pa_front to virtualise stream calls.
*/
#include "portaudio.h"
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
#define PA_STREAM_MAGIC (0x18273645)
typedef struct {
/*
all PaStreamInterface functions are guaranteed to be called with a
non-null, valid <stream> parameter
*/
PaError (*Close)( PaStream* stream );
PaError (*Start)( PaStream *stream );
PaError (*Stop)( PaStream *stream );
PaError (*Abort)( PaStream *stream );
PaError (*IsStopped)( PaStream *stream );
PaError (*IsActive)( PaStream *stream );
PaTime (*GetTime)( PaStream *stream );
double (*GetCpuLoad)( PaStream* stream );
PaError (*Read)( PaStream* stream, void *buffer, unsigned long frames );
PaError (*Write)( PaStream* stream, void *buffer, unsigned long frames );
signed long (*GetReadAvailable)( PaStream* stream );
signed long (*GetWriteAvailable)( PaStream* stream );
} PaUtilStreamInterface;
void PaUtil_InitializeStreamInterface( PaUtilStreamInterface *streamInterface,
PaError (*Close)( PaStream* ),
PaError (*Start)( PaStream* ),
PaError (*Stop)( PaStream* ),
PaError (*Abort)( PaStream* ),
PaError (*IsStopped)( PaStream* ),
PaError (*IsActive)( PaStream* ),
PaTime (*GetTime)( PaStream* ),
double (*GetCpuLoad)( PaStream* ),
PaError (*Read)( PaStream* stream, void *buffer, unsigned long frames ),
PaError (*Write)( PaStream* stream, void *buffer, unsigned long frames ),
signed long (*GetReadAvailable)( PaStream* stream ),
signed long (*GetWriteAvailable)( PaStream* stream ) );
/** Use PaUtil_DummyReadWrite and PaUtil_DummyGetAvailable for
callback based streams.
*/
PaError PaUtil_DummyReadWrite( PaStream* stream,
void *buffer,
unsigned long frames );
signed long PaUtil_DummyGetAvailable( PaStream* stream );
/** Use PaUtil_DummyGetCpuLoad for read/write streams
*/
double PaUtil_DummyGetCpuLoad( PaStream* stream );
typedef struct PaUtilStreamRepresentation {
unsigned long magic; /* set to PA_STREAM_MAGIC */
struct PaUtilStreamRepresentation *nextOpenStream; /* field used by multi-api code */
PaUtilStreamInterface *streamInterface;
PaStreamCallback *streamCallback;
PaStreamFinishedCallback *streamFinishedCallback;
void *userData;
PaStreamInfo streamInfo;
} PaUtilStreamRepresentation;
void PaUtil_InitializeStreamRepresentation( PaUtilStreamRepresentation *streamRepresentation,
PaUtilStreamInterface *streamInterface,
PaStreamCallback *streamCallback,
void *userData );
void PaUtil_TerminateStreamRepresentation( PaUtilStreamRepresentation *streamRepresentation );
#define PA_STREAM_REP( streamRepPtr )\
((PaUtilStreamRepresentation*) streamRepPtr )
#define PA_STREAM_INTERFACE( streamRepPtr )\
PA_STREAM_REP( streamRepPtr )->streamInterface
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* PA_STREAM_H */
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