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authorMiller Puckette <millerpuckette@users.sourceforge.net>2004-09-06 20:44:42 +0000
committerMiller Puckette <millerpuckette@users.sourceforge.net>2004-09-06 20:44:42 +0000
commitcfc2f7d280ae57ef563dd69bad27c61a148d6ded (patch)
tree92c4c645399fcad23f4a6ba15dff91c0e6fccb29 /pd/portaudio/pa_common/pa_stream.h
parented932acb5860bf8b9296169676499562a55d139e (diff)
... more changes to try to upload 0.38 test 5 to CVS
svn path=/trunk/; revision=2011
Diffstat (limited to 'pd/portaudio/pa_common/pa_stream.h')
-rw-r--r--pd/portaudio/pa_common/pa_stream.h196
1 files changed, 196 insertions, 0 deletions
diff --git a/pd/portaudio/pa_common/pa_stream.h b/pd/portaudio/pa_common/pa_stream.h
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+#ifndef PA_STREAM_H
+#define PA_STREAM_H
+/*
+ * $Id: pa_stream.h,v 1.1.2.13 2003/11/01 06:37:28 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
+ @brief Interface used by pa_front to virtualize functions which operate on
+ streams.
+*/
+
+
+#include "portaudio.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+
+#define PA_STREAM_MAGIC (0x18273645)
+
+
+/** A structure representing an (abstract) interface to a host API. Contains
+ pointers to functions which implement the interface.
+
+ All PaStreamInterface functions are guaranteed to be called with a non-null,
+ valid stream parameter.
+*/
+typedef struct {
+ 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, const void *buffer, unsigned long frames );
+ signed long (*GetReadAvailable)( PaStream* stream );
+ signed long (*GetWriteAvailable)( PaStream* stream );
+} PaUtilStreamInterface;
+
+
+/** Initialize the fields of a PaUtilStreamInterface structure.
+*/
+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, const void *buffer, unsigned long frames ),
+ signed long (*GetReadAvailable)( PaStream* stream ),
+ signed long (*GetWriteAvailable)( PaStream* stream ) );
+
+
+/** Dummy Read function for use in interfaces to a callback based streams.
+ Pass to the Read parameter of PaUtil_InitializeStreamInterface.
+ @return An error code indicating that the function has no effect
+ because the stream is a callback stream.
+*/
+PaError PaUtil_DummyRead( PaStream* stream,
+ void *buffer,
+ unsigned long frames );
+
+
+/** Dummy Write function for use in an interfaces to callback based streams.
+ Pass to the Write parameter of PaUtil_InitializeStreamInterface.
+ @return An error code indicating that the function has no effect
+ because the stream is a callback stream.
+*/
+PaError PaUtil_DummyWrite( PaStream* stream,
+ const void *buffer,
+ unsigned long frames );
+
+
+/** Dummy GetReadAvailable function for use in interfaces to callback based
+ streams. Pass to the GetReadAvailable parameter of PaUtil_InitializeStreamInterface.
+ @return An error code indicating that the function has no effect
+ because the stream is a callback stream.
+*/
+signed long PaUtil_DummyGetReadAvailable( PaStream* stream );
+
+
+/** Dummy GetWriteAvailable function for use in interfaces to callback based
+ streams. Pass to the GetWriteAvailable parameter of PaUtil_InitializeStreamInterface.
+ @return An error code indicating that the function has no effect
+ because the stream is a callback stream.
+*/
+signed long PaUtil_DummyGetWriteAvailable( PaStream* stream );
+
+
+
+/** Dummy GetCpuLoad function for use in an interface to a read/write stream.
+ Pass to the GetCpuLoad parameter of PaUtil_InitializeStreamInterface.
+ @return Returns 0.
+*/
+double PaUtil_DummyGetCpuLoad( PaStream* stream );
+
+
+/** Non host specific data for a stream. This data is used by pa_front to
+ forward to the appropriate functions in the streamInterface structure.
+*/
+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;
+
+
+/** Initialize a PaUtilStreamRepresentation structure.
+
+ @see PaUtil_InitializeStreamRepresentation
+*/
+void PaUtil_InitializeStreamRepresentation(
+ PaUtilStreamRepresentation *streamRepresentation,
+ PaUtilStreamInterface *streamInterface,
+ PaStreamCallback *streamCallback,
+ void *userData );
+
+
+/** Clean up a PaUtilStreamRepresentation structure previously initialized
+ by a call to PaUtil_InitializeStreamRepresentation.
+
+ @see PaUtil_InitializeStreamRepresentation
+*/
+void PaUtil_TerminateStreamRepresentation( PaUtilStreamRepresentation *streamRepresentation );
+
+
+/** Check that the stream pointer is valid.
+
+ @return Returns paNoError if the stream pointer appears to be OK, otherwise
+ returns an error indicating the cause of failure.
+*/
+PaError PaUtil_ValidateStreamPointer( PaStream *stream );
+
+
+/** Cast an opaque stream pointer into a pointer to a PaUtilStreamRepresentation.
+
+ @see PaUtilStreamRepresentation
+*/
+#define PA_STREAM_REP( stream )\
+ ((PaUtilStreamRepresentation*) (stream) )
+
+
+/** Cast an opaque stream pointer into a pointer to a PaUtilStreamInterface.
+
+ @see PaUtilStreamRepresentation, PaUtilStreamInterface
+*/
+#define PA_STREAM_INTERFACE( stream )\
+ PA_STREAM_REP( (stream) )->streamInterface
+
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* PA_STREAM_H */