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diff --git a/src/engine/external/portaudio/pa_stream.c b/src/engine/external/portaudio/pa_stream.c
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+/*

+ * $Id: pa_stream.c 1097 2006-08-26 08:27:53Z rossb $

+ * Portable Audio I/O Library

+ * 

+ *

+ * Based on the Open Source API proposed by Ross Bencina

+ * Copyright (c) 2002 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 Interface used by pa_front to virtualize functions which operate on

+ streams.

+*/

+

+

+#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;

+}