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authorGuenter Geiger <ggeiger@users.sourceforge.net>2003-05-09 16:04:00 +0000
committerGuenter Geiger <ggeiger@users.sourceforge.net>2003-05-09 16:04:00 +0000
commit9c0e19a3be2288db79e2502e5fa450c3e20a668d (patch)
treeca97ce615e037a533304fc4660dcf372ca3b9cd6 /pd/portaudio/pa_win_ds/pa_win_ds.c
parentef50dd62804d54af7da18d8bd8413c0dccd729b8 (diff)
This commit was generated by cvs2svn to compensate for changes in r610,
which included commits to RCS files with non-trunk default branches. svn path=/trunk/; revision=611
Diffstat (limited to 'pd/portaudio/pa_win_ds/pa_win_ds.c')
-rw-r--r--pd/portaudio/pa_win_ds/pa_win_ds.c1441
1 files changed, 1441 insertions, 0 deletions
diff --git a/pd/portaudio/pa_win_ds/pa_win_ds.c b/pd/portaudio/pa_win_ds/pa_win_ds.c
new file mode 100644
index 00000000..b23a407e
--- /dev/null
+++ b/pd/portaudio/pa_win_ds/pa_win_ds.c
@@ -0,0 +1,1441 @@
+/*
+ * $Id: pa_win_ds.c,v 1.1.2.29 2002/12/03 06:30:40 rossbencina Exp $
+ * Portable Audio I/O Library DirectSound implementation
+ *
+ * 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
+
+ @todo implement underflow/overflow streamCallback statusFlags, paNeverDropInput.
+
+ @todo implement host api specific extension to set i/o buffer sizes in frames
+
+ @todo implement initialisation of PaDeviceInfo default*Latency fields (currently set to 0.)
+
+ @todo implement ReadStream, WriteStream, GetStreamReadAvailable, GetStreamWriteAvailable
+
+ @todo audit handling of DirectSound result codes - in many cases we could convert a HRESULT into
+ a native portaudio error code. Standard DirectSound result codes are documented at msdn.
+
+ @todo implement IsFormatSupported
+
+ @todo implement PaDeviceInfo.defaultSampleRate;
+*/
+
+#include <stdio.h>
+#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"
+
+#include "dsound_wrapper.h"
+
+/* TODO
+O- fix "patest_stop.c"
+O- Handle buffer underflow, overflow, etc.
+*/
+
+#define PRINT(x) { printf x; fflush(stdout); }
+#define ERR_RPT(x) PRINT(x)
+#define DBUG(x) /* PRINT(x) */
+#define DBUGX(x) /* PRINT(x) */
+
+#define PA_USE_HIGH_LATENCY (0)
+#if PA_USE_HIGH_LATENCY
+#define PA_WIN_9X_LATENCY (500)
+#define PA_WIN_NT_LATENCY (600)
+#else
+#define PA_WIN_9X_LATENCY (140)
+#define PA_WIN_NT_LATENCY (280)
+#endif
+
+#define PA_WIN_WDM_LATENCY (120)
+
+#define SECONDS_PER_MSEC (0.001)
+#define MSEC_PER_SECOND (1000)
+
+/* prototypes for functions declared in this file */
+
+PaError PaWinDs_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex hostApiIndex );
+static void Terminate( struct PaUtilHostApiRepresentation *hostApi );
+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 IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate );
+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, void *buffer, unsigned long frames );
+static signed long GetStreamReadAvailable( PaStream* stream );
+static signed long GetStreamWriteAvailable( PaStream* stream );
+
+
+/* FIXME: should convert hr to a string */
+#define PA_DS_SET_LAST_DIRECTSOUND_ERROR( hr ) \
+ PaUtil_SetLastHostErrorInfo( paDirectSound, hr, "DirectSound error" )
+
+/************************************************* DX Prototypes **********/
+static BOOL CALLBACK Pa_EnumOutputProc(LPGUID lpGUID,
+ LPCTSTR lpszDesc,
+ LPCTSTR lpszDrvName,
+ LPVOID lpContext );
+static BOOL CALLBACK Pa_CountDevProc(LPGUID lpGUID,
+ LPCTSTR lpszDesc,
+ LPCTSTR lpszDrvName,
+ LPVOID lpContext );
+
+/************************************************************************************/
+/********************** Structures **************************************************/
+/************************************************************************************/
+/* PaWinDsHostApiRepresentation - host api datastructure specific to this implementation */
+
+typedef struct PaWinDsDeviceInfo
+{
+ GUID GUID;
+ GUID *lpGUID;
+ double sampleRates[3];
+} PaWinDsDeviceInfo;
+
+typedef struct
+{
+ PaUtilHostApiRepresentation inheritedHostApiRep;
+ PaUtilStreamInterface callbackStreamInterface;
+ PaUtilStreamInterface blockingStreamInterface;
+
+ PaUtilAllocationGroup *allocations;
+
+ /* implementation specific data goes here */
+ PaWinDsDeviceInfo *winDsDeviceInfos;
+ PaError enumerationError;
+
+} PaWinDsHostApiRepresentation;
+
+/* PaWinDsStream - a stream data structure specifically for this implementation */
+
+typedef struct PaWinDsStream
+{
+ PaUtilStreamRepresentation streamRepresentation;
+ PaUtilCpuLoadMeasurer cpuLoadMeasurer;
+ PaUtilBufferProcessor bufferProcessor;
+
+/* DirectSound specific data. */
+ DSoundWrapper directSoundWrapper;
+ MMRESULT timerID;
+ BOOL ifInsideCallback; /* Test for reentrancy. */
+ int framesPerDSBuffer;
+ double framesWritten;
+ double secondsPerHostByte; /* Used to optimize latency calculation for outTime */
+
+/* FIXME - move all below to PaUtilStreamRepresentation */
+ volatile int isStarted;
+ volatile int isActive;
+ volatile int stopProcessing; /* stop thread once existing buffers have been returned */
+ volatile int abortProcessing; /* stop thread immediately */
+} PaWinDsStream;
+
+
+/************************************************************************************
+** Just count devices so we know how much memory to allocate.
+*/
+static BOOL CALLBACK Pa_CountDevProc(LPGUID lpGUID,
+ LPCTSTR lpszDesc,
+ LPCTSTR lpszDrvName,
+ LPVOID lpContext )
+{
+ int *counterPtr = (int *)lpContext;
+ *counterPtr += 1;
+ return TRUE;
+}
+
+/************************************************************************************
+** Extract capabilities info from each device.
+*/
+static BOOL CALLBACK Pa_EnumOutputProc(LPGUID lpGUID,
+ LPCTSTR lpszDesc,
+ LPCTSTR lpszDrvName,
+ LPVOID lpContext )
+{
+ HRESULT hr;
+ DSCAPS caps;
+ LPDIRECTSOUND lpDirectSound;
+ PaWinDsHostApiRepresentation *winDsHostApi = (PaWinDsHostApiRepresentation *) lpContext;
+ PaUtilHostApiRepresentation *hostApi = &winDsHostApi->inheritedHostApiRep;
+ int index = hostApi->info.deviceCount;
+ PaDeviceInfo *deviceInfo = hostApi->deviceInfos[index];
+ PaWinDsDeviceInfo *winDsDeviceInfo = &winDsHostApi->winDsDeviceInfos[index];
+ int deviceOK = TRUE;
+
+ /* Copy GUID to static array. Set pointer. */
+ if( lpGUID == NULL )
+ {
+ winDsDeviceInfo->lpGUID = NULL;
+ }
+ else
+ {
+ winDsDeviceInfo->lpGUID = &winDsDeviceInfo->GUID;
+ memcpy( &winDsDeviceInfo->GUID, lpGUID, sizeof(GUID) );
+ }
+
+
+ /********** Output ******************************/
+
+ /* Create interfaces for each object. */
+ hr = dswDSoundEntryPoints.DirectSoundCreate( lpGUID, &lpDirectSound, NULL );
+ if( hr != DS_OK )
+ {
+ deviceInfo->maxOutputChannels = 0;
+ DBUG(("Cannot create dsound for %s. Result = 0x%x\n", lpszDesc, hr ));
+ deviceOK = FALSE;
+ }
+ else
+ {
+ /* Query device characteristics. */
+ caps.dwSize = sizeof(caps);
+ IDirectSound_GetCaps( lpDirectSound, &caps );
+
+#ifndef PA_NO_WMME
+ if( caps.dwFlags & DSCAPS_EMULDRIVER )
+ {
+ /* If WMME supported, then reject Emulated drivers because they are lousy. */
+ deviceOK = FALSE;
+ }
+#endif
+
+ if( deviceOK )
+ {
+ /* Mono or stereo device? */
+ deviceInfo->maxOutputChannels = ( caps.dwFlags & DSCAPS_PRIMARYSTEREO ) ? 2 : 1;
+
+ deviceInfo->defaultSampleRate = 0.; /* @todo IMPLEMENT ME */
+
+ /* Get sample rates. */
+ /*
+ winDsDeviceInfo->sampleRates[0] = (double) caps.dwMinSecondarySampleRate;
+ winDsDeviceInfo->sampleRates[1] = (double) caps.dwMaxSecondarySampleRate;
+ if( caps.dwFlags & DSCAPS_CONTINUOUSRATE ) deviceInfo->numSampleRates = -1;
+ else if( caps.dwMinSecondarySampleRate == caps.dwMaxSecondarySampleRate )
+ {
+ if( caps.dwMinSecondarySampleRate == 0 )
+ {
+ //
+ // On my Thinkpad 380Z, DirectSoundV6 returns min-max=0 !!
+ // But it supports continuous sampling.
+ // So fake range of rates, and hope it really supports it.
+ //
+ winDsDeviceInfo->sampleRates[0] = 11025.0f;
+ winDsDeviceInfo->sampleRates[1] = 48000.0f;
+ deviceInfo->numSampleRates = -1; // continuous range
+
+ DBUG(("PA - Reported rates both zero. Setting to fake values for device #%d\n", sDeviceIndex ));
+ }
+ else
+ {
+ deviceInfo->numSampleRates = 1;
+ }
+ }
+ else if( (caps.dwMinSecondarySampleRate < 1000.0) && (caps.dwMaxSecondarySampleRate > 50000.0) )
+ {
+ // The EWS88MT drivers lie, lie, lie. The say they only support two rates, 100 & 100000.
+ // But we know that they really support a range of rates!
+ // So when we see a ridiculous set of rates, assume it is a range.
+ //
+ deviceInfo->numSampleRates = -1;
+ DBUG(("PA - Sample rate range used instead of two odd values for device #%d\n", sDeviceIndex ));
+ }
+ else deviceInfo->numSampleRates = 2;
+ */
+ }
+
+ IDirectSound_Release( lpDirectSound );
+ }
+
+ if( deviceOK )
+ {
+ if( lpGUID == NULL ) hostApi->info.defaultOutputDevice = index;
+
+ /* Allocate room for descriptive name. */
+ if( lpszDesc != NULL )
+ {
+ char *deviceName;
+ int len = strlen(lpszDesc);
+ deviceName = (char*)PaUtil_GroupAllocateMemory( winDsHostApi->allocations, len + 1 );
+ if( !deviceName )
+ {
+ winDsHostApi->enumerationError = paInsufficientMemory;
+ return FALSE;
+ }
+ memcpy( (void *) deviceName, lpszDesc, len+1 );
+ deviceInfo->name = deviceName;
+ }
+
+ hostApi->info.deviceCount++;
+ }
+
+ return( TRUE );
+}
+
+
+/************************************************************************************
+** Extract capabilities info from each device.
+*/
+static BOOL CALLBACK Pa_EnumInputProc(LPGUID lpGUID,
+ LPCTSTR lpszDesc,
+ LPCTSTR lpszDrvName,
+ LPVOID lpContext )
+{
+ HRESULT hr;
+ DSCCAPS caps;
+ LPDIRECTSOUNDCAPTURE lpDirectSoundCapture;
+ PaWinDsHostApiRepresentation *winDsHostApi = (PaWinDsHostApiRepresentation *) lpContext;
+ PaUtilHostApiRepresentation *hostApi = &winDsHostApi->inheritedHostApiRep;
+ int index = hostApi->info.deviceCount;
+ PaDeviceInfo *deviceInfo = hostApi->deviceInfos[index];
+ PaWinDsDeviceInfo *winDsDeviceInfo = &winDsHostApi->winDsDeviceInfos[index];
+ int deviceOK = TRUE;
+
+ /* Copy GUID to static array. Set pointer. */
+ if( lpGUID == NULL )
+ {
+ winDsDeviceInfo->lpGUID = NULL;
+ }
+ else
+ {
+ winDsDeviceInfo->lpGUID = &winDsDeviceInfo->GUID;
+ memcpy( &winDsDeviceInfo->GUID, lpGUID, sizeof(GUID) );
+ }
+
+ /********** Input ******************************/
+
+ hr = dswDSoundEntryPoints.DirectSoundCaptureCreate( lpGUID, &lpDirectSoundCapture, NULL );
+ if( hr != DS_OK )
+ {
+ deviceInfo->maxInputChannels = 0;
+ DBUG(("Cannot create Capture for %s. Result = 0x%x\n", lpszDesc, hr ));
+ deviceOK = FALSE;
+ }
+ else
+ {
+ /* Query device characteristics. */
+ caps.dwSize = sizeof(caps);
+ IDirectSoundCapture_GetCaps( lpDirectSoundCapture, &caps );
+
+ /* printf("caps.dwFormats = 0x%x\n", caps.dwFormats ); */
+ deviceInfo->maxInputChannels = caps.dwChannels;
+ /* Determine sample rates from flags. */
+ /*
+ if( caps.dwChannels == 2 )
+ {
+ int index = 0;
+ if( caps.dwFormats & WAVE_FORMAT_1S16) winDsDeviceInfo->sampleRates[index++] = 11025.0;
+ if( caps.dwFormats & WAVE_FORMAT_2S16) winDsDeviceInfo->sampleRates[index++] = 22050.0;
+ if( caps.dwFormats & WAVE_FORMAT_4S16) winDsDeviceInfo->sampleRates[index++] = 44100.0;
+ deviceInfo->numSampleRates = index;
+ }
+ else if( caps.dwChannels == 1 )
+ {
+ int index = 0;
+ if( caps.dwFormats & WAVE_FORMAT_1M16) winDsDeviceInfo->sampleRates[index++] = 11025.0;
+ if( caps.dwFormats & WAVE_FORMAT_2M16) winDsDeviceInfo->sampleRates[index++] = 22050.0;
+ if( caps.dwFormats & WAVE_FORMAT_4M16) winDsDeviceInfo->sampleRates[index++] = 44100.0;
+ deviceInfo->numSampleRates = index;
+ }
+ else
+ {
+ deviceInfo->numSampleRates = 0;
+ deviceOK = FALSE;
+ }
+ */
+ IDirectSoundCapture_Release( lpDirectSoundCapture );
+ }
+
+ if( deviceOK )
+ {
+ /* Allocate room for descriptive name. */
+ if( lpszDesc != NULL )
+ {
+ char *deviceName;
+ int len = strlen(lpszDesc);
+ deviceName = (char*)PaUtil_GroupAllocateMemory( winDsHostApi->allocations, len + 1 );
+ if( !deviceName )
+ {
+ winDsHostApi->enumerationError = paInsufficientMemory;
+ return FALSE;
+ }
+ memcpy( (void *) deviceName, lpszDesc, len+1 );
+ deviceInfo->name = deviceName;
+ }
+
+ if( lpGUID == NULL ) hostApi->info.defaultInputDevice = index;
+
+ hostApi->info.deviceCount++;
+ }
+
+ return TRUE;
+}
+
+
+/***********************************************************************************/
+PaError PaWinDs_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex hostApiIndex )
+{
+ PaError result = paNoError;
+ int i, deviceCount;
+ PaWinDsHostApiRepresentation *winDsHostApi;
+ PaDeviceInfo *deviceInfoArray;
+
+ DSW_InitializeDSoundEntryPoints();
+
+ winDsHostApi = (PaWinDsHostApiRepresentation*)PaUtil_AllocateMemory( sizeof(PaWinDsHostApiRepresentation) );
+ if( !winDsHostApi )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ winDsHostApi->allocations = PaUtil_CreateAllocationGroup();
+ if( !winDsHostApi->allocations )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ *hostApi = &winDsHostApi->inheritedHostApiRep;
+ (*hostApi)->info.structVersion = 1;
+ (*hostApi)->info.type = paDirectSound;
+ (*hostApi)->info.name = "Windows DirectSound";
+
+ (*hostApi)->info.deviceCount = 0;
+ (*hostApi)->info.defaultInputDevice = paNoDevice;
+ (*hostApi)->info.defaultOutputDevice = paNoDevice;
+
+ deviceCount = 0;
+/* DSound - enumerate devices to count them. */
+ dswDSoundEntryPoints.DirectSoundEnumerate( (LPDSENUMCALLBACK)Pa_CountDevProc, &deviceCount );
+ dswDSoundEntryPoints.DirectSoundCaptureEnumerate( (LPDSENUMCALLBACK)Pa_CountDevProc, &deviceCount );
+
+ if( deviceCount > 0 )
+ {
+ /* allocate array for pointers to PaDeviceInfo structs */
+ (*hostApi)->deviceInfos = (PaDeviceInfo**)PaUtil_GroupAllocateMemory(
+ winDsHostApi->allocations, sizeof(PaDeviceInfo*) * deviceCount );
+ if( !(*hostApi)->deviceInfos )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ /* allocate all PaDeviceInfo structs in a contiguous block */
+ deviceInfoArray = (PaDeviceInfo*)PaUtil_GroupAllocateMemory(
+ winDsHostApi->allocations, sizeof(PaDeviceInfo) * deviceCount );
+ if( !deviceInfoArray )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ /* allocate all DSound specific info structs in a contiguous block */
+ winDsHostApi->winDsDeviceInfos = (PaWinDsDeviceInfo*)PaUtil_GroupAllocateMemory(
+ winDsHostApi->allocations, sizeof(PaWinDsDeviceInfo) * deviceCount );
+ if( !winDsHostApi->winDsDeviceInfos )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ for( i=0; i < deviceCount; ++i )
+ {
+ PaDeviceInfo *deviceInfo = &deviceInfoArray[i];
+ deviceInfo->structVersion = 2;
+ deviceInfo->hostApi = hostApiIndex;
+ deviceInfo->name = 0;
+
+ deviceInfo->defaultLowInputLatency = 0.; /* @todo IMPLEMENT ME */
+ deviceInfo->defaultLowOutputLatency = 0.; /* @todo IMPLEMENT ME */
+ deviceInfo->defaultHighInputLatency = 0.; /* @todo IMPLEMENT ME */
+ deviceInfo->defaultHighOutputLatency = 0.; /* @todo IMPLEMENT ME */
+
+ (*hostApi)->deviceInfos[i] = deviceInfo;
+ }
+
+ /* DSound - Enumerate again to fill in structures. */
+ winDsHostApi->enumerationError = 0;
+ dswDSoundEntryPoints.DirectSoundEnumerate( (LPDSENUMCALLBACK)Pa_EnumOutputProc, (void *)winDsHostApi );
+ if( winDsHostApi->enumerationError != paNoError ) return winDsHostApi->enumerationError;
+
+ winDsHostApi->enumerationError = 0;
+ dswDSoundEntryPoints.DirectSoundCaptureEnumerate( (LPDSENUMCALLBACK)Pa_EnumInputProc, (void *)winDsHostApi );
+ if( winDsHostApi->enumerationError != paNoError ) return winDsHostApi->enumerationError;
+ }
+
+ (*hostApi)->Terminate = Terminate;
+ (*hostApi)->OpenStream = OpenStream;
+ (*hostApi)->IsFormatSupported = IsFormatSupported;
+
+ PaUtil_InitializeStreamInterface( &winDsHostApi->callbackStreamInterface, CloseStream, StartStream,
+ StopStream, AbortStream, IsStreamStopped, IsStreamActive,
+ GetStreamTime, GetStreamCpuLoad,
+ PaUtil_DummyReadWrite, PaUtil_DummyReadWrite, PaUtil_DummyGetAvailable, PaUtil_DummyGetAvailable );
+
+ PaUtil_InitializeStreamInterface( &winDsHostApi->blockingStreamInterface, CloseStream, StartStream,
+ StopStream, AbortStream, IsStreamStopped, IsStreamActive,
+ GetStreamTime, PaUtil_DummyGetCpuLoad,
+ ReadStream, WriteStream, GetStreamReadAvailable, GetStreamWriteAvailable );
+
+ return result;
+
+error:
+ if( winDsHostApi )
+ {
+ if( winDsHostApi->allocations )
+ {
+ PaUtil_FreeAllAllocations( winDsHostApi->allocations );
+ PaUtil_DestroyAllocationGroup( winDsHostApi->allocations );
+ }
+
+ PaUtil_FreeMemory( winDsHostApi );
+ }
+ return result;
+}
+
+
+/***********************************************************************************/
+static void Terminate( struct PaUtilHostApiRepresentation *hostApi )
+{
+ PaWinDsHostApiRepresentation *winDsHostApi = (PaWinDsHostApiRepresentation*)hostApi;
+
+ /*
+ IMPLEMENT ME:
+ - clean up any resourced not handled by the allocation group
+ */
+
+ if( winDsHostApi->allocations )
+ {
+ PaUtil_FreeAllAllocations( winDsHostApi->allocations );
+ PaUtil_DestroyAllocationGroup( winDsHostApi->allocations );
+ }
+
+ PaUtil_FreeMemory( winDsHostApi );
+
+ DSW_TerminateDSoundEntryPoints();
+}
+
+
+/* Set minimal latency based on whether NT or Win95.
+ * NT has higher latency.
+ */
+static int PaWinDS_GetMinSystemLatency( void )
+{
+ int minLatencyMsec;
+ /* Set minimal latency based on whether NT or other OS.
+ * NT has higher latency.
+ */
+ OSVERSIONINFO osvi;
+ osvi.dwOSVersionInfoSize = sizeof( osvi );
+ GetVersionEx( &osvi );
+ DBUG(("PA - PlatformId = 0x%x\n", osvi.dwPlatformId ));
+ DBUG(("PA - MajorVersion = 0x%x\n", osvi.dwMajorVersion ));
+ DBUG(("PA - MinorVersion = 0x%x\n", osvi.dwMinorVersion ));
+ /* Check for NT */
+ if( (osvi.dwMajorVersion == 4) && (osvi.dwPlatformId == 2) )
+ {
+ minLatencyMsec = PA_WIN_NT_LATENCY;
+ }
+ else if(osvi.dwMajorVersion >= 5)
+ {
+ minLatencyMsec = PA_WIN_WDM_LATENCY;
+ }
+ else
+ {
+ minLatencyMsec = PA_WIN_9X_LATENCY;
+ }
+ return minLatencyMsec;
+}
+
+/***********************************************************************************/
+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;
+
+ /* 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;
+
+ /* 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 */
+ }
+ else
+ {
+ outputChannelCount = 0;
+ }
+
+ /*
+ IMPLEMENT ME:
+ - 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
+ */
+
+ return paFormatIsSupported;
+}
+
+
+/*************************************************************************
+** Determine minimum number of buffers required for this host based
+** on minimum latency. Latency can be optionally set by user by setting
+** an environment variable. For example, to set latency to 200 msec, put:
+**
+** set PA_MIN_LATENCY_MSEC=200
+**
+** in the AUTOEXEC.BAT file and reboot.
+** If the environment variable is not set, then the latency will be determined
+** based on the OS. Windows NT has higher latency than Win95.
+*/
+#define PA_LATENCY_ENV_NAME ("PA_MIN_LATENCY_MSEC")
+#define PA_ENV_BUF_SIZE (32)
+
+static int PaWinDs_GetMinLatencyFrames( double sampleRate )
+{
+ char envbuf[PA_ENV_BUF_SIZE];
+ DWORD hresult;
+ int minLatencyMsec = 0;
+
+ /* Let user determine minimal latency by setting environment variable. */
+ hresult = GetEnvironmentVariable( PA_LATENCY_ENV_NAME, envbuf, PA_ENV_BUF_SIZE );
+ if( (hresult > 0) && (hresult < PA_ENV_BUF_SIZE) )
+ {
+ minLatencyMsec = atoi( envbuf );
+ }
+ else
+ {
+ minLatencyMsec = PaWinDS_GetMinSystemLatency();
+#if PA_USE_HIGH_LATENCY
+ PRINT(("PA - Minimum Latency set to %d msec!\n", minLatencyMsec ));
+#endif
+
+ }
+
+ return (int) (minLatencyMsec * sampleRate * SECONDS_PER_MSEC);
+}
+
+/***********************************************************************************/
+/* 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;
+ PaWinDsHostApiRepresentation *winDsHostApi = (PaWinDsHostApiRepresentation*)hostApi;
+ PaWinDsStream *stream = 0;
+ int inputChannelCount, outputChannelCount;
+ PaSampleFormat inputSampleFormat, outputSampleFormat;
+ PaSampleFormat hostInputSampleFormat, hostOutputSampleFormat;
+ unsigned long suggestedInputLatencyFrames, suggestedOutputLatencyFrames;
+
+ if( inputParameters )
+ {
+ inputChannelCount = inputParameters->channelCount;
+ inputSampleFormat = inputParameters->sampleFormat;
+ suggestedInputLatencyFrames = inputParameters->suggestedLatency * sampleRate;
+
+ /* IDEA: the following 3 checks could be performed by default by pa_front
+ unless some flag indicated otherwise */
+
+ /* 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 hostApiSpecificStreamInfo */
+ if( inputParameters->hostApiSpecificStreamInfo )
+ return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
+ }
+ else
+ {
+ inputChannelCount = 0;
+ suggestedInputLatencyFrames = 0;
+ }
+
+
+ if( outputParameters )
+ {
+ outputChannelCount = outputParameters->channelCount;
+ outputSampleFormat = outputParameters->sampleFormat;
+ suggestedOutputLatencyFrames = outputParameters->suggestedLatency * sampleRate;
+
+ /* 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 hostApiSpecificStreamInfo */
+ if( outputParameters->hostApiSpecificStreamInfo )
+ return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
+ }
+ else
+ {
+ outputChannelCount = 0;
+ suggestedOutputLatencyFrames = 0;
+ }
+
+
+ /*
+ IMPLEMENT ME:
+
+ ( the following two checks are taken care of by PaUtil_InitializeBufferProcessor() )
+
+ - 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 = (PaWinDsStream*)PaUtil_AllocateMemory( sizeof(PaWinDsStream) );
+ if( !stream )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ if( streamCallback )
+ {
+ PaUtil_InitializeStreamRepresentation( &stream->streamRepresentation,
+ &winDsHostApi->callbackStreamInterface, streamCallback, userData );
+ }
+ else
+ {
+ PaUtil_InitializeStreamRepresentation( &stream->streamRepresentation,
+ &winDsHostApi->blockingStreamInterface, streamCallback, userData );
+ }
+
+ stream->streamRepresentation.streamInfo.inputLatency = 0.; /* FIXME: not initialised anywhere else */
+ stream->streamRepresentation.streamInfo.outputLatency = 0.;
+ stream->streamRepresentation.streamInfo.sampleRate = sampleRate;
+
+
+ PaUtil_InitializeCpuLoadMeasurer( &stream->cpuLoadMeasurer, sampleRate );
+
+
+ if( inputParameters )
+ {
+ /* IMPLEMENT ME - establish which host formats are available */
+ hostInputSampleFormat =
+ PaUtil_SelectClosestAvailableFormat( paInt16 /* native formats */, inputParameters->sampleFormat );
+ }
+
+ if( outputParameters )
+ {
+ /* IMPLEMENT ME - establish which host formats are available */
+ hostOutputSampleFormat =
+ PaUtil_SelectClosestAvailableFormat( paInt16 /* native formats */, outputParameters->sampleFormat );
+ }
+
+ result = PaUtil_InitializeBufferProcessor( &stream->bufferProcessor,
+ inputChannelCount, inputSampleFormat, hostInputSampleFormat,
+ outputChannelCount, outputSampleFormat, hostOutputSampleFormat,
+ sampleRate, streamFlags, framesPerBuffer,
+ framesPerBuffer, /* ignored in paUtilVariableHostBufferSizePartialUsageAllowed mode. */
+ /* This next mode is required because DS can split the host buffer when it wraps around. */
+ paUtilVariableHostBufferSizePartialUsageAllowed,
+ streamCallback, userData );
+ if( result != paNoError )
+ goto error;
+
+/* DirectSound specific initialization */
+ {
+ HRESULT hr;
+ int bytesPerDirectSoundBuffer;
+ DSoundWrapper *dsw;
+ int userLatencyFrames;
+ int minLatencyFrames;
+
+ stream->timerID = 0;
+ dsw = &stream->directSoundWrapper;
+ DSW_Init( dsw );
+
+ /* Get system minimum latency. */
+ minLatencyFrames = PaWinDs_GetMinLatencyFrames( sampleRate );
+
+ /* Let user override latency by passing latency parameter. */
+ userLatencyFrames = (suggestedInputLatencyFrames > suggestedOutputLatencyFrames)
+ ? suggestedInputLatencyFrames
+ : suggestedOutputLatencyFrames;
+ if( userLatencyFrames > 0 ) minLatencyFrames = userLatencyFrames;
+
+ /* Calculate stream->framesPerDSBuffer depending on framesPerBuffer */
+ if( framesPerBuffer == paFramesPerBufferUnspecified )
+ {
+ /* App support variable framesPerBuffer */
+ stream->framesPerDSBuffer = minLatencyFrames;
+
+ stream->streamRepresentation.streamInfo.outputLatency = (double)(minLatencyFrames - 1) / sampleRate;
+ }
+ else
+ {
+ /* Round up to number of buffers needed to guarantee that latency. */
+ int numUserBuffers = (minLatencyFrames + framesPerBuffer - 1) / framesPerBuffer;
+ if( numUserBuffers < 1 ) numUserBuffers = 1;
+ numUserBuffers += 1; /* So we have latency worth of buffers ahead of current buffer. */
+ stream->framesPerDSBuffer = framesPerBuffer * numUserBuffers;
+
+ stream->streamRepresentation.streamInfo.outputLatency = (double)(framesPerBuffer * (numUserBuffers-1)) / sampleRate;
+ }
+
+ {
+ /* @todo REVIEW: this calculation seems incorrect to me - rossb. */
+ int msecLatency = (int) ((stream->framesPerDSBuffer * MSEC_PER_SECOND) / sampleRate);
+ PRINT(("PortAudio on DirectSound - Latency = %d frames, %d msec\n", stream->framesPerDSBuffer, msecLatency ));
+ }
+
+
+ /* ------------------ OUTPUT */
+ if( outputParameters )
+ {
+ PaDeviceInfo *deviceInfo = hostApi->deviceInfos[ outputParameters->device ];
+ DBUG(("PaHost_OpenStream: deviceID = 0x%x\n", outputDevice));
+
+ bytesPerDirectSoundBuffer = stream->framesPerDSBuffer * outputParameters->channelCount * sizeof(short);
+ if( bytesPerDirectSoundBuffer < DSBSIZE_MIN )
+ {
+ result = paBufferTooSmall;
+ goto error;
+ }
+ else if( bytesPerDirectSoundBuffer > DSBSIZE_MAX )
+ {
+ result = paBufferTooBig;
+ goto error;
+ }
+
+
+ hr = dswDSoundEntryPoints.DirectSoundCreate( winDsHostApi->winDsDeviceInfos[outputParameters->device].lpGUID,
+ &dsw->dsw_pDirectSound, NULL );
+ if( hr != DS_OK )
+ {
+ ERR_RPT(("PortAudio: DirectSoundCreate() failed!\n"));
+ result = paUnanticipatedHostError;
+ PA_DS_SET_LAST_DIRECTSOUND_ERROR( hr );
+ goto error;
+ }
+ hr = DSW_InitOutputBuffer( dsw,
+ (unsigned long) (sampleRate + 0.5),
+ outputParameters->channelCount, bytesPerDirectSoundBuffer );
+ DBUG(("DSW_InitOutputBuffer() returns %x\n", hr));
+ if( hr != DS_OK )
+ {
+ result = paUnanticipatedHostError;
+ PA_DS_SET_LAST_DIRECTSOUND_ERROR( hr );
+ goto error;
+ }
+ /* Calculate value used in latency calculation to avoid real-time divides. */
+ stream->secondsPerHostByte = 1.0 /
+ (stream->bufferProcessor.bytesPerHostOutputSample *
+ outputChannelCount * sampleRate);
+ }
+
+ /* ------------------ INPUT */
+ if( inputParameters )
+ {
+ PaDeviceInfo *deviceInfo = hostApi->deviceInfos[ inputParameters->device ];
+
+ bytesPerDirectSoundBuffer = stream->framesPerDSBuffer * inputParameters->channelCount * sizeof(short);
+ if( bytesPerDirectSoundBuffer < DSBSIZE_MIN )
+ {
+ result = paBufferTooSmall;
+ goto error;
+ }
+ else if( bytesPerDirectSoundBuffer > DSBSIZE_MAX )
+ {
+ result = paBufferTooBig;
+ goto error;
+ }
+
+ hr = dswDSoundEntryPoints.DirectSoundCaptureCreate( winDsHostApi->winDsDeviceInfos[inputParameters->device].lpGUID,
+ &dsw->dsw_pDirectSoundCapture, NULL );
+ if( hr != DS_OK )
+ {
+ ERR_RPT(("PortAudio: DirectSoundCaptureCreate() failed!\n"));
+ result = paUnanticipatedHostError;
+ PA_DS_SET_LAST_DIRECTSOUND_ERROR( hr );
+ goto error;
+ }
+ hr = DSW_InitInputBuffer( dsw,
+ (unsigned long) (sampleRate + 0.5),
+ inputParameters->channelCount, bytesPerDirectSoundBuffer );
+ DBUG(("DSW_InitInputBuffer() returns %x\n", hr));
+ if( hr != DS_OK )
+ {
+ ERR_RPT(("PortAudio: DSW_InitInputBuffer() returns %x\n", hr));
+ result = paUnanticipatedHostError;
+ PA_DS_SET_LAST_DIRECTSOUND_ERROR( hr );
+ goto error;
+ }
+ }
+
+ }
+
+ *s = (PaStream*)stream;
+
+ return result;
+
+error:
+ if( stream )
+ PaUtil_FreeMemory( stream );
+
+ return result;
+}
+
+
+/***********************************************************************************/
+static PaError Pa_TimeSlice( PaWinDsStream *stream )
+{
+ PaError result = 0; /* FIXME: this should be declared int and this function should also return that type (same as stream callback return type)*/
+ DSoundWrapper *dsw;
+ long numFrames = 0;
+ long bytesEmpty = 0;
+ long bytesFilled = 0;
+ long bytesToXfer = 0;
+ long framesToXfer = 0;
+ long numInFramesReady = 0;
+ long numOutFramesReady = 0;
+ long bytesProcessed;
+ HRESULT hresult;
+ double outputLatency = 0;
+ PaStreamCallbackTimeInfo timeInfo = {0,0,0}; /* @todo implement inputBufferAdcTime */
+/* Input */
+ LPBYTE lpInBuf1 = NULL;
+ LPBYTE lpInBuf2 = NULL;
+ DWORD dwInSize1 = 0;
+ DWORD dwInSize2 = 0;
+/* Output */
+ LPBYTE lpOutBuf1 = NULL;
+ LPBYTE lpOutBuf2 = NULL;
+ DWORD dwOutSize1 = 0;
+ DWORD dwOutSize2 = 0;
+
+ dsw = &stream->directSoundWrapper;
+
+ /* How much input data is available? */
+ if( stream->bufferProcessor.inputChannelCount > 0 )
+ {
+ DSW_QueryInputFilled( dsw, &bytesFilled );
+ framesToXfer = numInFramesReady = bytesFilled / dsw->dsw_BytesPerInputFrame;
+ outputLatency = ((double)bytesFilled) * stream->secondsPerHostByte;
+ }
+
+ /* How much output room is available? */
+ if( stream->bufferProcessor.outputChannelCount > 0 )
+ {
+ DSW_QueryOutputSpace( dsw, &bytesEmpty );
+ framesToXfer = numOutFramesReady = bytesEmpty / dsw->dsw_BytesPerOutputFrame;
+ }
+
+ if( (numInFramesReady > 0) && (numOutFramesReady > 0) )
+ {
+ framesToXfer = (numOutFramesReady < numInFramesReady) ? numOutFramesReady : numInFramesReady;
+ }
+
+ if( framesToXfer > 0 )
+ {
+
+ PaUtil_BeginCpuLoadMeasurement( &stream->cpuLoadMeasurer );
+
+ /* The outputBufferDacTime parameter should indicates the time at which
+ the first sample of the output buffer is heard at the DACs. */
+ timeInfo.currentTime = PaUtil_GetTime();
+ timeInfo.outputBufferDacTime = timeInfo.currentTime + outputLatency;
+
+
+ PaUtil_BeginBufferProcessing( &stream->bufferProcessor, &timeInfo );
+
+ /* Input */
+ if( stream->bufferProcessor.inputChannelCount > 0 )
+ {
+ bytesToXfer = framesToXfer * dsw->dsw_BytesPerInputFrame;
+ hresult = IDirectSoundCaptureBuffer_Lock ( dsw->dsw_InputBuffer,
+ dsw->dsw_ReadOffset, bytesToXfer,
+ (void **) &lpInBuf1, &dwInSize1,
+ (void **) &lpInBuf2, &dwInSize2, 0);
+ if (hresult != DS_OK)
+ {
+ ERR_RPT(("DirectSound IDirectSoundCaptureBuffer_Lock failed, hresult = 0x%x\n",hresult));
+ result = paUnanticipatedHostError;
+ PA_DS_SET_LAST_DIRECTSOUND_ERROR( hresult );
+ goto error2;
+ }
+
+ numFrames = dwInSize1 / dsw->dsw_BytesPerInputFrame;
+ PaUtil_SetInputFrameCount( &stream->bufferProcessor, numFrames );
+ PaUtil_SetInterleavedInputChannels( &stream->bufferProcessor, 0, lpInBuf1, 0 );
+ /* Is input split into two regions. */
+ if( dwInSize2 > 0 )
+ {
+ numFrames = dwInSize2 / dsw->dsw_BytesPerInputFrame;
+ PaUtil_Set2ndInputFrameCount( &stream->bufferProcessor, numFrames );
+ PaUtil_Set2ndInterleavedInputChannels( &stream->bufferProcessor, 0, lpInBuf2, 0 );
+ }
+ }
+
+ /* Output */
+ if( stream->bufferProcessor.outputChannelCount > 0 )
+ {
+ bytesToXfer = framesToXfer * dsw->dsw_BytesPerOutputFrame;
+ hresult = IDirectSoundBuffer_Lock ( dsw->dsw_OutputBuffer,
+ dsw->dsw_WriteOffset, bytesToXfer,
+ (void **) &lpOutBuf1, &dwOutSize1,
+ (void **) &lpOutBuf2, &dwOutSize2, 0);
+ if (hresult != DS_OK)
+ {
+ ERR_RPT(("DirectSound IDirectSoundBuffer_Lock failed, hresult = 0x%x\n",hresult));
+ result = paUnanticipatedHostError;
+ PA_DS_SET_LAST_DIRECTSOUND_ERROR( hresult );
+ goto error1;
+ }
+
+ numFrames = dwOutSize1 / dsw->dsw_BytesPerOutputFrame;
+ PaUtil_SetOutputFrameCount( &stream->bufferProcessor, numFrames );
+ PaUtil_SetInterleavedOutputChannels( &stream->bufferProcessor, 0, lpOutBuf1, 0 );
+
+ /* Is output split into two regions. */
+ if( dwOutSize2 > 0 )
+ {
+ numFrames = dwOutSize2 / dsw->dsw_BytesPerOutputFrame;
+ PaUtil_Set2ndOutputFrameCount( &stream->bufferProcessor, numFrames );
+ PaUtil_Set2ndInterleavedOutputChannels( &stream->bufferProcessor, 0, lpOutBuf2, 0 );
+ }
+ }
+
+ numFrames = PaUtil_EndBufferProcessing( &stream->bufferProcessor, &result );
+ stream->framesWritten += numFrames;
+
+ if( stream->bufferProcessor.outputChannelCount > 0 )
+ {
+ /* Update our buffer offset and unlock sound buffer */
+ bytesProcessed = numFrames * dsw->dsw_BytesPerOutputFrame;
+ dsw->dsw_WriteOffset = (dsw->dsw_WriteOffset + bytesProcessed) % dsw->dsw_OutputSize;
+ IDirectSoundBuffer_Unlock( dsw->dsw_OutputBuffer, lpOutBuf1, dwOutSize1, lpOutBuf2, dwOutSize2);
+ dsw->dsw_FramesWritten += numFrames;
+ }
+
+error1:
+ if( stream->bufferProcessor.inputChannelCount > 0 )
+ {
+ /* Update our buffer offset and unlock sound buffer */
+ bytesProcessed = numFrames * dsw->dsw_BytesPerInputFrame;
+ dsw->dsw_ReadOffset = (dsw->dsw_ReadOffset + bytesProcessed) % dsw->dsw_InputSize;
+ IDirectSoundCaptureBuffer_Unlock( dsw->dsw_InputBuffer, lpInBuf1, dwInSize1, lpInBuf2, dwInSize2);
+ }
+error2:
+
+ PaUtil_EndCpuLoadMeasurement( &stream->cpuLoadMeasurer, numFrames );
+
+ }
+
+ return result;
+}
+/*******************************************************************/
+static void CALLBACK Pa_TimerCallback(UINT uID, UINT uMsg, DWORD dwUser, DWORD dw1, DWORD dw2)
+{
+ PaWinDsStream *stream;
+
+ stream = (PaWinDsStream *) dwUser;
+ if( stream == NULL ) return;
+
+ if( stream->isActive )
+ {
+ if( stream->abortProcessing )
+ {
+ stream->isActive = 0;
+ }
+ else if( stream->stopProcessing )
+ {
+ DSoundWrapper *dsw = &stream->directSoundWrapper;
+ if( stream->bufferProcessor.outputChannelCount > 0 )
+ {
+ DSW_ZeroEmptySpace( dsw );
+ /* clear isActive when all sound played */
+ if( dsw->dsw_FramesPlayed >= stream->framesWritten )
+ {
+ stream->isActive = 0;
+ }
+ }
+ else
+ {
+ stream->isActive = 0;
+ }
+ }
+ else
+ {
+ if( Pa_TimeSlice( stream ) != 0) /* Call time slice independant of timing method. */
+ {
+ /* FIXME implement handling of paComplete and paAbort if possible */
+ stream->stopProcessing = 1;
+ }
+ }
+
+ if( !stream->isActive ){
+ 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;
+ PaWinDsStream *stream = (PaWinDsStream*)s;
+
+ DSW_Term( &stream->directSoundWrapper );
+
+ PaUtil_TerminateBufferProcessor( &stream->bufferProcessor );
+ PaUtil_TerminateStreamRepresentation( &stream->streamRepresentation );
+ PaUtil_FreeMemory( stream );
+
+ return result;
+}
+
+/***********************************************************************************/
+static PaError StartStream( PaStream *s )
+{
+ PaError result = paNoError;
+ PaWinDsStream *stream = (PaWinDsStream*)s;
+ HRESULT hr;
+
+ if( stream->bufferProcessor.inputChannelCount > 0 )
+ {
+ hr = DSW_StartInput( &stream->directSoundWrapper );
+ DBUG(("StartStream: DSW_StartInput returned = 0x%X.\n", hr));
+ if( hr != DS_OK )
+ {
+ result = paUnanticipatedHostError;
+ PA_DS_SET_LAST_DIRECTSOUND_ERROR( hr );
+ goto error;
+ }
+ }
+
+ stream->framesWritten = 0;
+
+ stream->abortProcessing = 0;
+ stream->stopProcessing = 0;
+ stream->isActive = 1;
+
+ if( stream->bufferProcessor.outputChannelCount > 0 )
+ {
+ /* Give user callback a chance to pre-fill buffer. REVIEW - i thought we weren't pre-filling, rb. */
+ result = Pa_TimeSlice( stream );
+ if( result != paNoError ) return result; // FIXME - what if finished?
+
+ hr = DSW_StartOutput( &stream->directSoundWrapper );
+ DBUG(("PaHost_StartOutput: DSW_StartOutput returned = 0x%X.\n", hr));
+ if( hr != DS_OK )
+ {
+ result = paUnanticipatedHostError;
+ PA_DS_SET_LAST_DIRECTSOUND_ERROR( hr );
+ goto error;
+ }
+ }
+
+
+ /* Create timer that will wake us up so we can fill the DSound buffer. */
+ {
+ int resolution;
+ int framesPerWakeup = stream->framesPerDSBuffer / 4;
+ int msecPerWakeup = MSEC_PER_SECOND * framesPerWakeup / (int) stream->streamRepresentation.streamInfo.sampleRate;
+ if( msecPerWakeup < 10 ) msecPerWakeup = 10;
+ else if( msecPerWakeup > 100 ) msecPerWakeup = 100;
+ resolution = msecPerWakeup/4;
+ stream->timerID = timeSetEvent( msecPerWakeup, resolution, (LPTIMECALLBACK) Pa_TimerCallback,
+ (DWORD) stream, TIME_PERIODIC );
+ }
+ if( stream->timerID == 0 )
+ {
+ stream->isActive = 0;
+ result = paUnanticipatedHostError;
+ PA_DS_SET_LAST_DIRECTSOUND_ERROR( hr );
+ goto error;
+ }
+
+ stream->isStarted = TRUE;
+
+error:
+ return result;
+}
+
+
+/***********************************************************************************/
+static PaError StopStream( PaStream *s )
+{
+ PaError result = paNoError;
+ PaWinDsStream *stream = (PaWinDsStream*)s;
+ HRESULT hr;
+ int timeoutMsec;
+
+ stream->stopProcessing = 1;
+ /* Set timeout at 20% beyond maximum time we might wait. */
+ timeoutMsec = (int) (1200.0 * stream->framesPerDSBuffer / stream->streamRepresentation.streamInfo.sampleRate);
+ while( stream->isActive && (timeoutMsec > 0) )
+ {
+ Sleep(10);
+ timeoutMsec -= 10;
+ }
+ if( stream->timerID != 0 )
+ {
+ timeKillEvent(stream->timerID); /* Stop callback timer. */
+ stream->timerID = 0;
+ }
+
+
+ if( stream->bufferProcessor.outputChannelCount > 0 )
+ {
+ hr = DSW_StopOutput( &stream->directSoundWrapper );
+ }
+
+ if( stream->bufferProcessor.inputChannelCount > 0 )
+ {
+ hr = DSW_StopInput( &stream->directSoundWrapper );
+ }
+
+ stream->isStarted = FALSE;
+
+ return result;
+}
+
+
+/***********************************************************************************/
+static PaError AbortStream( PaStream *s )
+{
+ PaError result = paNoError;
+ PaWinDsStream *stream = (PaWinDsStream*)s;
+
+ stream->abortProcessing = 1;
+ return StopStream( s );
+}
+
+
+/***********************************************************************************/
+static PaError IsStreamStopped( PaStream *s )
+{
+ PaWinDsStream *stream = (PaWinDsStream*)s;
+
+ return !stream->isStarted;
+}
+
+
+/***********************************************************************************/
+static PaError IsStreamActive( PaStream *s )
+{
+ PaWinDsStream *stream = (PaWinDsStream*)s;
+
+ return stream->isActive;
+}
+
+/***********************************************************************************/
+static PaTime GetStreamTime( PaStream *s )
+{
+/*
+ new behavior for GetStreamTime is to return a stream based seconds clock
+ used for the outTime parameter to the callback.
+ FIXME: delete this comment when the other unnecessary related code has
+ been cleaned from this file.
+
+ PaWinDsStream *stream = (PaWinDsStream*)s;
+ DSoundWrapper *dsw;
+ dsw = &stream->directSoundWrapper;
+ return dsw->dsw_FramesPlayed;
+*/
+ return PaUtil_GetTime();
+}
+
+
+/***********************************************************************************/
+static double GetStreamCpuLoad( PaStream* s )
+{
+ PaWinDsStream *stream = (PaWinDsStream*)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 )
+{
+ PaWinDsStream *stream = (PaWinDsStream*)s;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+
+ return paNoError;
+}
+
+
+/***********************************************************************************/
+static PaError WriteStream( PaStream* s,
+ void *buffer,
+ unsigned long frames )
+{
+ PaWinDsStream *stream = (PaWinDsStream*)s;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+
+ return paNoError;
+}
+
+
+/***********************************************************************************/
+static signed long GetStreamReadAvailable( PaStream* s )
+{
+ PaWinDsStream *stream = (PaWinDsStream*)s;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+
+ return 0;
+}
+
+
+/***********************************************************************************/
+static signed long GetStreamWriteAvailable( PaStream* s )
+{
+ PaWinDsStream *stream = (PaWinDsStream*)s;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+
+ return 0;
+}
+
+
+