add initial structure

1 files changed, 150 insertions, 0 deletions

diff --git a/portaudio/src/common/pa_stream.c b/portaudio/src/common/pa_stream.c
new file mode 100644
index 0000000..ffbf530
--- /dev/null
+++ b/portaudio/src/common/pa_stream.c
@@ -0,0 +1,150 @@
+/*
+ * $Id$
+ * 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;
+}