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-rw-r--r--portaudio/src/hostapi/skeleton/README.txt1
-rw-r--r--portaudio/src/hostapi/skeleton/pa_hostapi_skeleton.c814
2 files changed, 815 insertions, 0 deletions
diff --git a/portaudio/src/hostapi/skeleton/README.txt b/portaudio/src/hostapi/skeleton/README.txt
new file mode 100644
index 0000000..39d4c8d
--- /dev/null
+++ b/portaudio/src/hostapi/skeleton/README.txt
@@ -0,0 +1 @@
+pa_hostapi_skeleton.c provides a starting point for implementing support for a new host API with PortAudio. The idea is that you copy it to a new directory inside /hostapi and start editing. \ No newline at end of file
diff --git a/portaudio/src/hostapi/skeleton/pa_hostapi_skeleton.c b/portaudio/src/hostapi/skeleton/pa_hostapi_skeleton.c
new file mode 100644
index 0000000..46808d2
--- /dev/null
+++ b/portaudio/src/hostapi/skeleton/pa_hostapi_skeleton.c
@@ -0,0 +1,814 @@
+/*
+ * $Id$
+ * Portable Audio I/O Library skeleton implementation
+ * demonstrates how to use the common functions to implement support
+ * for a host API
+ *
+ * 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.
+ *
+ * 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 Skeleton implementation of support for a host API.
+
+ This file is provided as a starting point for implementing support for
+ a new host API. It provides examples of how the common code can be used.
+
+ @note IMPLEMENT ME comments are used to indicate functionality
+ which much be customised for each implementation.
+*/
+
+
+#include <string.h> /* strlen() */
+
+#include "pa_util.h"
+#include "pa_allocation.h"
+#include "pa_hostapi.h"
+#include "pa_stream.h"
+#include "pa_cpuload.h"
+#include "pa_process.h"
+
+
+/* prototypes for functions declared in this file */
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+PaError PaSkeleton_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex index );
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+static void Terminate( struct PaUtilHostApiRepresentation *hostApi );
+static PaError IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate );
+static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
+ PaStream** s,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate,
+ unsigned long framesPerBuffer,
+ PaStreamFlags streamFlags,
+ PaStreamCallback *streamCallback,
+ void *userData );
+static PaError CloseStream( PaStream* stream );
+static PaError StartStream( PaStream *stream );
+static PaError StopStream( PaStream *stream );
+static PaError AbortStream( PaStream *stream );
+static PaError IsStreamStopped( PaStream *s );
+static PaError IsStreamActive( PaStream *stream );
+static PaTime GetStreamTime( PaStream *stream );
+static double GetStreamCpuLoad( PaStream* stream );
+static PaError ReadStream( PaStream* stream, void *buffer, unsigned long frames );
+static PaError WriteStream( PaStream* stream, const void *buffer, unsigned long frames );
+static signed long GetStreamReadAvailable( PaStream* stream );
+static signed long GetStreamWriteAvailable( PaStream* stream );
+
+
+/* IMPLEMENT ME: a macro like the following one should be used for reporting
+ host errors */
+#define PA_SKELETON_SET_LAST_HOST_ERROR( errorCode, errorText ) \
+ PaUtil_SetLastHostErrorInfo( paInDevelopment, errorCode, errorText )
+
+/* PaSkeletonHostApiRepresentation - host api datastructure specific to this implementation */
+
+typedef struct
+{
+ PaUtilHostApiRepresentation inheritedHostApiRep;
+ PaUtilStreamInterface callbackStreamInterface;
+ PaUtilStreamInterface blockingStreamInterface;
+
+ PaUtilAllocationGroup *allocations;
+
+ /* implementation specific data goes here */
+}
+PaSkeletonHostApiRepresentation; /* IMPLEMENT ME: rename this */
+
+
+PaError PaSkeleton_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex hostApiIndex )
+{
+ PaError result = paNoError;
+ int i, deviceCount;
+ PaSkeletonHostApiRepresentation *skeletonHostApi;
+ PaDeviceInfo *deviceInfoArray;
+
+ skeletonHostApi = (PaSkeletonHostApiRepresentation*)PaUtil_AllocateMemory( sizeof(PaSkeletonHostApiRepresentation) );
+ if( !skeletonHostApi )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ skeletonHostApi->allocations = PaUtil_CreateAllocationGroup();
+ if( !skeletonHostApi->allocations )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ *hostApi = &skeletonHostApi->inheritedHostApiRep;
+ (*hostApi)->info.structVersion = 1;
+ (*hostApi)->info.type = paInDevelopment; /* IMPLEMENT ME: change to correct type id */
+ (*hostApi)->info.name = "skeleton implementation"; /* IMPLEMENT ME: change to correct name */
+
+ (*hostApi)->info.defaultInputDevice = paNoDevice; /* IMPLEMENT ME */
+ (*hostApi)->info.defaultOutputDevice = paNoDevice; /* IMPLEMENT ME */
+
+ (*hostApi)->info.deviceCount = 0;
+
+ deviceCount = 0; /* IMPLEMENT ME */
+
+ if( deviceCount > 0 )
+ {
+ (*hostApi)->deviceInfos = (PaDeviceInfo**)PaUtil_GroupAllocateMemory(
+ skeletonHostApi->allocations, sizeof(PaDeviceInfo*) * deviceCount );
+ if( !(*hostApi)->deviceInfos )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ /* allocate all device info structs in a contiguous block */
+ deviceInfoArray = (PaDeviceInfo*)PaUtil_GroupAllocateMemory(
+ skeletonHostApi->allocations, sizeof(PaDeviceInfo) * deviceCount );
+ if( !deviceInfoArray )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ for( i=0; i < deviceCount; ++i )
+ {
+ PaDeviceInfo *deviceInfo = &deviceInfoArray[i];
+ deviceInfo->structVersion = 2;
+ deviceInfo->hostApi = hostApiIndex;
+ deviceInfo->name = 0; /* IMPLEMENT ME: allocate block and copy name eg:
+ deviceName = (char*)PaUtil_GroupAllocateMemory( skeletonHostApi->allocations, strlen(srcName) + 1 );
+ if( !deviceName )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+ strcpy( deviceName, srcName );
+ deviceInfo->name = deviceName;
+ */
+
+ deviceInfo->maxInputChannels = 0; /* IMPLEMENT ME */
+ deviceInfo->maxOutputChannels = 0; /* IMPLEMENT ME */
+
+ deviceInfo->defaultLowInputLatency = 0.; /* IMPLEMENT ME */
+ deviceInfo->defaultLowOutputLatency = 0.; /* IMPLEMENT ME */
+ deviceInfo->defaultHighInputLatency = 0.; /* IMPLEMENT ME */
+ deviceInfo->defaultHighOutputLatency = 0.; /* IMPLEMENT ME */
+
+ deviceInfo->defaultSampleRate = 0.; /* IMPLEMENT ME */
+
+ (*hostApi)->deviceInfos[i] = deviceInfo;
+ ++(*hostApi)->info.deviceCount;
+ }
+ }
+
+ (*hostApi)->Terminate = Terminate;
+ (*hostApi)->OpenStream = OpenStream;
+ (*hostApi)->IsFormatSupported = IsFormatSupported;
+
+ PaUtil_InitializeStreamInterface( &skeletonHostApi->callbackStreamInterface, CloseStream, StartStream,
+ StopStream, AbortStream, IsStreamStopped, IsStreamActive,
+ GetStreamTime, GetStreamCpuLoad,
+ PaUtil_DummyRead, PaUtil_DummyWrite,
+ PaUtil_DummyGetReadAvailable, PaUtil_DummyGetWriteAvailable );
+
+ PaUtil_InitializeStreamInterface( &skeletonHostApi->blockingStreamInterface, CloseStream, StartStream,
+ StopStream, AbortStream, IsStreamStopped, IsStreamActive,
+ GetStreamTime, PaUtil_DummyGetCpuLoad,
+ ReadStream, WriteStream, GetStreamReadAvailable, GetStreamWriteAvailable );
+
+ return result;
+
+error:
+ if( skeletonHostApi )
+ {
+ if( skeletonHostApi->allocations )
+ {
+ PaUtil_FreeAllAllocations( skeletonHostApi->allocations );
+ PaUtil_DestroyAllocationGroup( skeletonHostApi->allocations );
+ }
+
+ PaUtil_FreeMemory( skeletonHostApi );
+ }
+ return result;
+}
+
+
+static void Terminate( struct PaUtilHostApiRepresentation *hostApi )
+{
+ PaSkeletonHostApiRepresentation *skeletonHostApi = (PaSkeletonHostApiRepresentation*)hostApi;
+
+ /*
+ IMPLEMENT ME:
+ - clean up any resources not handled by the allocation group
+ */
+
+ if( skeletonHostApi->allocations )
+ {
+ PaUtil_FreeAllAllocations( skeletonHostApi->allocations );
+ PaUtil_DestroyAllocationGroup( skeletonHostApi->allocations );
+ }
+
+ PaUtil_FreeMemory( skeletonHostApi );
+}
+
+
+static PaError IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate )
+{
+ int inputChannelCount, outputChannelCount;
+ PaSampleFormat inputSampleFormat, outputSampleFormat;
+
+ if( inputParameters )
+ {
+ inputChannelCount = inputParameters->channelCount;
+ inputSampleFormat = inputParameters->sampleFormat;
+
+ /* all standard sample formats are supported by the buffer adapter,
+ this implementation doesn't support any custom sample formats */
+ if( inputSampleFormat & paCustomFormat )
+ return paSampleFormatNotSupported;
+
+ /* unless alternate device specification is supported, reject the use of
+ paUseHostApiSpecificDeviceSpecification */
+
+ if( inputParameters->device == paUseHostApiSpecificDeviceSpecification )
+ return paInvalidDevice;
+
+ /* check that input device can support inputChannelCount */
+ if( inputChannelCount > hostApi->deviceInfos[ inputParameters->device ]->maxInputChannels )
+ return paInvalidChannelCount;
+
+ /* validate inputStreamInfo */
+ if( inputParameters->hostApiSpecificStreamInfo )
+ return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
+ }
+ else
+ {
+ inputChannelCount = 0;
+ }
+
+ if( outputParameters )
+ {
+ outputChannelCount = outputParameters->channelCount;
+ outputSampleFormat = outputParameters->sampleFormat;
+
+ /* all standard sample formats are supported by the buffer adapter,
+ this implementation doesn't support any custom sample formats */
+ if( outputSampleFormat & paCustomFormat )
+ return paSampleFormatNotSupported;
+
+ /* unless alternate device specification is supported, reject the use of
+ paUseHostApiSpecificDeviceSpecification */
+
+ if( outputParameters->device == paUseHostApiSpecificDeviceSpecification )
+ return paInvalidDevice;
+
+ /* check that output device can support outputChannelCount */
+ if( outputChannelCount > hostApi->deviceInfos[ outputParameters->device ]->maxOutputChannels )
+ return paInvalidChannelCount;
+
+ /* validate outputStreamInfo */
+ if( outputParameters->hostApiSpecificStreamInfo )
+ return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
+ }
+ else
+ {
+ outputChannelCount = 0;
+ }
+
+ /*
+ IMPLEMENT ME:
+
+ - if a full duplex stream is requested, check that the combination
+ of input and output parameters is supported if necessary
+
+ - check that the device supports sampleRate
+
+ Because the buffer adapter handles conversion between all standard
+ sample formats, the following checks are only required if paCustomFormat
+ is implemented, or under some other unusual conditions.
+
+ - check that input device can support inputSampleFormat, or that
+ we have the capability to convert from inputSampleFormat to
+ a native format
+
+ - check that output device can support outputSampleFormat, or that
+ we have the capability to convert from outputSampleFormat to
+ a native format
+ */
+
+
+ /* suppress unused variable warnings */
+ (void) sampleRate;
+
+ return paFormatIsSupported;
+}
+
+/* PaSkeletonStream - a stream data structure specifically for this implementation */
+
+typedef struct PaSkeletonStream
+{ /* IMPLEMENT ME: rename this */
+ PaUtilStreamRepresentation streamRepresentation;
+ PaUtilCpuLoadMeasurer cpuLoadMeasurer;
+ PaUtilBufferProcessor bufferProcessor;
+
+ /* IMPLEMENT ME:
+ - implementation specific data goes here
+ */
+ unsigned long framesPerHostCallback; /* just an example */
+}
+PaSkeletonStream;
+
+/* see pa_hostapi.h for a list of validity guarantees made about OpenStream parameters */
+
+static PaError OpenStream( struct PaUtilHostApiRepresentation *hostApi,
+ PaStream** s,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate,
+ unsigned long framesPerBuffer,
+ PaStreamFlags streamFlags,
+ PaStreamCallback *streamCallback,
+ void *userData )
+{
+ PaError result = paNoError;
+ PaSkeletonHostApiRepresentation *skeletonHostApi = (PaSkeletonHostApiRepresentation*)hostApi;
+ PaSkeletonStream *stream = 0;
+ unsigned long framesPerHostBuffer = framesPerBuffer; /* these may not be equivalent for all implementations */
+ int inputChannelCount, outputChannelCount;
+ PaSampleFormat inputSampleFormat, outputSampleFormat;
+ PaSampleFormat hostInputSampleFormat, hostOutputSampleFormat;
+
+
+ if( inputParameters )
+ {
+ inputChannelCount = inputParameters->channelCount;
+ inputSampleFormat = inputParameters->sampleFormat;
+
+ /* unless alternate device specification is supported, reject the use of
+ paUseHostApiSpecificDeviceSpecification */
+
+ if( inputParameters->device == paUseHostApiSpecificDeviceSpecification )
+ return paInvalidDevice;
+
+ /* check that input device can support inputChannelCount */
+ if( inputChannelCount > hostApi->deviceInfos[ inputParameters->device ]->maxInputChannels )
+ return paInvalidChannelCount;
+
+ /* validate inputStreamInfo */
+ if( inputParameters->hostApiSpecificStreamInfo )
+ return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
+
+ /* IMPLEMENT ME - establish which host formats are available */
+ hostInputSampleFormat =
+ PaUtil_SelectClosestAvailableFormat( paInt16 /* native formats */, inputSampleFormat );
+ }
+ else
+ {
+ inputChannelCount = 0;
+ inputSampleFormat = hostInputSampleFormat = paInt16; /* Suppress 'uninitialised var' warnings. */
+ }
+
+ if( outputParameters )
+ {
+ outputChannelCount = outputParameters->channelCount;
+ outputSampleFormat = outputParameters->sampleFormat;
+
+ /* unless alternate device specification is supported, reject the use of
+ paUseHostApiSpecificDeviceSpecification */
+
+ if( outputParameters->device == paUseHostApiSpecificDeviceSpecification )
+ return paInvalidDevice;
+
+ /* check that output device can support inputChannelCount */
+ if( outputChannelCount > hostApi->deviceInfos[ outputParameters->device ]->maxOutputChannels )
+ return paInvalidChannelCount;
+
+ /* validate outputStreamInfo */
+ if( outputParameters->hostApiSpecificStreamInfo )
+ return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
+
+ /* IMPLEMENT ME - establish which host formats are available */
+ hostOutputSampleFormat =
+ PaUtil_SelectClosestAvailableFormat( paInt16 /* native formats */, outputSampleFormat );
+ }
+ else
+ {
+ outputChannelCount = 0;
+ outputSampleFormat = hostOutputSampleFormat = paInt16; /* Suppress 'uninitialized var' warnings. */
+ }
+
+ /*
+ IMPLEMENT ME:
+
+ ( the following two checks are taken care of by PaUtil_InitializeBufferProcessor() FIXME - checks needed? )
+
+ - check that input device can support inputSampleFormat, or that
+ we have the capability to convert from outputSampleFormat to
+ a native format
+
+ - check that output device can support outputSampleFormat, or that
+ we have the capability to convert from outputSampleFormat to
+ a native format
+
+ - if a full duplex stream is requested, check that the combination
+ of input and output parameters is supported
+
+ - check that the device supports sampleRate
+
+ - alter sampleRate to a close allowable rate if possible / necessary
+
+ - validate suggestedInputLatency and suggestedOutputLatency parameters,
+ use default values where necessary
+ */
+
+
+
+
+ /* validate platform specific flags */
+ if( (streamFlags & paPlatformSpecificFlags) != 0 )
+ return paInvalidFlag; /* unexpected platform specific flag */
+
+
+ stream = (PaSkeletonStream*)PaUtil_AllocateMemory( sizeof(PaSkeletonStream) );
+ if( !stream )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ if( streamCallback )
+ {
+ PaUtil_InitializeStreamRepresentation( &stream->streamRepresentation,
+ &skeletonHostApi->callbackStreamInterface, streamCallback, userData );
+ }
+ else
+ {
+ PaUtil_InitializeStreamRepresentation( &stream->streamRepresentation,
+ &skeletonHostApi->blockingStreamInterface, streamCallback, userData );
+ }
+
+ PaUtil_InitializeCpuLoadMeasurer( &stream->cpuLoadMeasurer, sampleRate );
+
+
+ /* we assume a fixed host buffer size in this example, but the buffer processor
+ can also support bounded and unknown host buffer sizes by passing
+ paUtilBoundedHostBufferSize or paUtilUnknownHostBufferSize instead of
+ paUtilFixedHostBufferSize below. */
+
+ result = PaUtil_InitializeBufferProcessor( &stream->bufferProcessor,
+ inputChannelCount, inputSampleFormat, hostInputSampleFormat,
+ outputChannelCount, outputSampleFormat, hostOutputSampleFormat,
+ sampleRate, streamFlags, framesPerBuffer,
+ framesPerHostBuffer, paUtilFixedHostBufferSize,
+ streamCallback, userData );
+ if( result != paNoError )
+ goto error;
+
+
+ /*
+ IMPLEMENT ME: initialise the following fields with estimated or actual
+ values.
+ */
+ stream->streamRepresentation.streamInfo.inputLatency =
+ (PaTime)PaUtil_GetBufferProcessorInputLatencyFrames(&stream->bufferProcessor) / sampleRate; /* inputLatency is specified in _seconds_ */
+ stream->streamRepresentation.streamInfo.outputLatency =
+ (PaTime)PaUtil_GetBufferProcessorOutputLatencyFrames(&stream->bufferProcessor) / sampleRate; /* outputLatency is specified in _seconds_ */
+ stream->streamRepresentation.streamInfo.sampleRate = sampleRate;
+
+
+ /*
+ IMPLEMENT ME:
+ - additional stream setup + opening
+ */
+
+ stream->framesPerHostCallback = framesPerHostBuffer;
+
+ *s = (PaStream*)stream;
+
+ return result;
+
+error:
+ if( stream )
+ PaUtil_FreeMemory( stream );
+
+ return result;
+}
+
+/*
+ ExampleHostProcessingLoop() illustrates the kind of processing which may
+ occur in a host implementation.
+
+*/
+static void ExampleHostProcessingLoop( void *inputBuffer, void *outputBuffer, void *userData )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)userData;
+ PaStreamCallbackTimeInfo timeInfo = {0,0,0}; /* IMPLEMENT ME */
+ int callbackResult;
+ unsigned long framesProcessed;
+
+ PaUtil_BeginCpuLoadMeasurement( &stream->cpuLoadMeasurer );
+
+ /*
+ IMPLEMENT ME:
+ - generate timing information
+ - handle buffer slips
+ */
+
+ /*
+ If you need to byte swap or shift inputBuffer to convert it into a
+ portaudio format, do it here.
+ */
+
+
+
+ PaUtil_BeginBufferProcessing( &stream->bufferProcessor, &timeInfo, 0 /* IMPLEMENT ME: pass underflow/overflow flags when necessary */ );
+
+ /*
+ depending on whether the host buffers are interleaved, non-interleaved
+ or a mixture, you will want to call PaUtil_SetInterleaved*Channels(),
+ PaUtil_SetNonInterleaved*Channel() or PaUtil_Set*Channel() here.
+ */
+
+ PaUtil_SetInputFrameCount( &stream->bufferProcessor, 0 /* default to host buffer size */ );
+ PaUtil_SetInterleavedInputChannels( &stream->bufferProcessor,
+ 0, /* first channel of inputBuffer is channel 0 */
+ inputBuffer,
+ 0 ); /* 0 - use inputChannelCount passed to init buffer processor */
+
+ PaUtil_SetOutputFrameCount( &stream->bufferProcessor, 0 /* default to host buffer size */ );
+ PaUtil_SetInterleavedOutputChannels( &stream->bufferProcessor,
+ 0, /* first channel of outputBuffer is channel 0 */
+ outputBuffer,
+ 0 ); /* 0 - use outputChannelCount passed to init buffer processor */
+
+ /* you must pass a valid value of callback result to PaUtil_EndBufferProcessing()
+ in general you would pass paContinue for normal operation, and
+ paComplete to drain the buffer processor's internal output buffer.
+ You can check whether the buffer processor's output buffer is empty
+ using PaUtil_IsBufferProcessorOuputEmpty( bufferProcessor )
+ */
+ callbackResult = paContinue;
+ framesProcessed = PaUtil_EndBufferProcessing( &stream->bufferProcessor, &callbackResult );
+
+
+ /*
+ If you need to byte swap or shift outputBuffer to convert it to
+ host format, do it here.
+ */
+
+ PaUtil_EndCpuLoadMeasurement( &stream->cpuLoadMeasurer, framesProcessed );
+
+
+ if( callbackResult == paContinue )
+ {
+ /* nothing special to do */
+ }
+ else if( callbackResult == paAbort )
+ {
+ /* IMPLEMENT ME - finish playback immediately */
+
+ /* once finished, call the finished callback */
+ if( stream->streamRepresentation.streamFinishedCallback != 0 )
+ stream->streamRepresentation.streamFinishedCallback( stream->streamRepresentation.userData );
+ }
+ else
+ {
+ /* User callback has asked us to stop with paComplete or other non-zero value */
+
+ /* IMPLEMENT ME - finish playback once currently queued audio has completed */
+
+ /* once finished, call the finished callback */
+ if( stream->streamRepresentation.streamFinishedCallback != 0 )
+ stream->streamRepresentation.streamFinishedCallback( stream->streamRepresentation.userData );
+ }
+}
+
+
+/*
+ When CloseStream() is called, the multi-api layer ensures that
+ the stream has already been stopped or aborted.
+*/
+static PaError CloseStream( PaStream* s )
+{
+ PaError result = paNoError;
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /*
+ IMPLEMENT ME:
+ - additional stream closing + cleanup
+ */
+
+ PaUtil_TerminateBufferProcessor( &stream->bufferProcessor );
+ PaUtil_TerminateStreamRepresentation( &stream->streamRepresentation );
+ PaUtil_FreeMemory( stream );
+
+ return result;
+}
+
+
+static PaError StartStream( PaStream *s )
+{
+ PaError result = paNoError;
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ PaUtil_ResetBufferProcessor( &stream->bufferProcessor );
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior */
+
+ /* suppress unused function warning. the code in ExampleHostProcessingLoop or
+ something similar should be implemented to feed samples to and from the
+ host after StartStream() is called.
+ */
+ (void) ExampleHostProcessingLoop;
+
+ return result;
+}
+
+
+static PaError StopStream( PaStream *s )
+{
+ PaError result = paNoError;
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior */
+
+ return result;
+}
+
+
+static PaError AbortStream( PaStream *s )
+{
+ PaError result = paNoError;
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior */
+
+ return result;
+}
+
+
+static PaError IsStreamStopped( PaStream *s )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior */
+
+ return 0;
+}
+
+
+static PaError IsStreamActive( PaStream *s )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior */
+
+ return 0;
+}
+
+
+static PaTime GetStreamTime( PaStream *s )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+
+ return 0;
+}
+
+
+static double GetStreamCpuLoad( PaStream* s )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ return PaUtil_GetCpuLoad( &stream->cpuLoadMeasurer );
+}
+
+
+/*
+ As separate stream interfaces are used for blocking and callback
+ streams, the following functions can be guaranteed to only be called
+ for blocking streams.
+*/
+
+static PaError ReadStream( PaStream* s,
+ void *buffer,
+ unsigned long frames )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) buffer;
+ (void) frames;
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+
+ return paNoError;
+}
+
+
+static PaError WriteStream( PaStream* s,
+ const void *buffer,
+ unsigned long frames )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) buffer;
+ (void) frames;
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+
+ return paNoError;
+}
+
+
+static signed long GetStreamReadAvailable( PaStream* s )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+
+ return 0;
+}
+
+
+static signed long GetStreamWriteAvailable( PaStream* s )
+{
+ PaSkeletonStream *stream = (PaSkeletonStream*)s;
+
+ /* suppress unused variable warnings */
+ (void) stream;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+
+ return 0;
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-23 20:25:03 +0000