SV platform dependency builds

/*

 * $Id$

 * Portable Audio I/O Library

 * stream interface

 *

 * Based on the Open Source API proposed by Ross Bencina

 * Copyright (c) 2008 Ross Bencina

 *

 * 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.

 */

/** @file

 @ingroup common_src

 @brief Stream interfaces, representation structures and helper functions

 used to interface between pa_front.c host API implementations.

*/

#include "pa_stream.h"

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*, void *, unsigned long ),

                                       PaError (*Write)( PaStream*, const void *, unsigned long ),

                                       signed long (*GetReadAvailable)( PaStream* ),

                                       signed long (*GetWriteAvailable)( PaStream* )  )

{

    streamInterface->Close = Close;

    streamInterface->Start = Start;

    streamInterface->Stop = Stop;

    streamInterface->Abort = Abort;

    streamInterface->IsStopped = IsStopped;

    streamInterface->IsActive = IsActive;

    streamInterface->GetTime = GetTime;

    streamInterface->GetCpuLoad = GetCpuLoad;

    streamInterface->Read = Read;

    streamInterface->Write = Write;

    streamInterface->GetReadAvailable = GetReadAvailable;

    streamInterface->GetWriteAvailable = GetWriteAvailable;

}

void PaUtil_InitializeStreamRepresentation( PaUtilStreamRepresentation *streamRepresentation,

        PaUtilStreamInterface *streamInterface,

        PaStreamCallback *streamCallback,

        void *userData )

{

    streamRepresentation->magic = PA_STREAM_MAGIC;

    streamRepresentation->nextOpenStream = 0;

    streamRepresentation->streamInterface = streamInterface;

    streamRepresentation->streamCallback = streamCallback;

    streamRepresentation->streamFinishedCallback = 0;

    streamRepresentation->userData = userData;

    streamRepresentation->streamInfo.inputLatency = 0.;

    streamRepresentation->streamInfo.outputLatency = 0.;

    streamRepresentation->streamInfo.sampleRate = 0.;

}

void PaUtil_TerminateStreamRepresentation( PaUtilStreamRepresentation *streamRepresentation )

{

    streamRepresentation->magic = 0;

}

PaError PaUtil_DummyRead( PaStream* stream,

                               void *buffer,

                               unsigned long frames )

{

    (void)stream; /* unused parameter */

    (void)buffer; /* unused parameter */

    (void)frames; /* unused parameter */

    return paCanNotReadFromACallbackStream;

}

PaError PaUtil_DummyWrite( PaStream* stream,

                               const void *buffer,

                               unsigned long frames )

{

    (void)stream; /* unused parameter */

    (void)buffer; /* unused parameter */

    (void)frames; /* unused parameter */

    return paCanNotWriteToACallbackStream;

}

signed long PaUtil_DummyGetReadAvailable( PaStream* stream )

{

    (void)stream; /* unused parameter */

    return paCanNotReadFromACallbackStream;

}

signed long PaUtil_DummyGetWriteAvailable( PaStream* stream )

{

    (void)stream; /* unused parameter */

    return paCanNotWriteToACallbackStream;

}

double PaUtil_DummyGetCpuLoad( PaStream* stream )

{

    (void)stream; /* unused parameter */

    return 0.0;

}