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authorMiller Puckette <millerpuckette@users.sourceforge.net>2004-09-06 21:03:01 +0000
committerMiller Puckette <millerpuckette@users.sourceforge.net>2004-09-06 21:03:01 +0000
commit43da63a095b3bbcea1009337f1af027a04499266 (patch)
tree45c32d196d4d21fc55ef792ea2bb19b7d0610f77 /pd/portaudio/pa_asio/pa_asio.cpp
parentcfc2f7d280ae57ef563dd69bad27c61a148d6ded (diff)
More files I forgot to add
svn path=/trunk/; revision=2012
Diffstat (limited to 'pd/portaudio/pa_asio/pa_asio.cpp')
-rw-r--r--pd/portaudio/pa_asio/pa_asio.cpp2656
1 files changed, 2656 insertions, 0 deletions
diff --git a/pd/portaudio/pa_asio/pa_asio.cpp b/pd/portaudio/pa_asio/pa_asio.cpp
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+++ b/pd/portaudio/pa_asio/pa_asio.cpp
@@ -0,0 +1,2656 @@
+/*
+ * $Id: pa_asio.cpp,v 1.7.2.59 2004/02/15 15:39:05 rossbencina Exp $
+ * Portable Audio I/O Library for ASIO Drivers
+ *
+ * Author: Stephane Letz
+ * Based on the Open Source API proposed by Ross Bencina
+ * Copyright (c) 2000-2002 Stephane Letz, Phil Burk, 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.
+ *
+ * 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.
+ */
+
+/* Modification History
+
+ 08-03-01 First version : Stephane Letz
+ 08-06-01 Tweaks for PC, use C++, buffer allocation, Float32 to Int32 conversion : Phil Burk
+ 08-20-01 More conversion, PA_StreamTime, Pa_GetHostError : Stephane Letz
+ 08-21-01 PaUInt8 bug correction, implementation of ASIOSTFloat32LSB and ASIOSTFloat32MSB native formats : Stephane Letz
+ 08-24-01 MAX_INT32_FP hack, another Uint8 fix : Stephane and Phil
+ 08-27-01 Implementation of hostBufferSize < userBufferSize case, better management of the ouput buffer when
+ the stream is stopped : Stephane Letz
+ 08-28-01 Check the stream pointer for null in bufferSwitchTimeInfo, correct bug in bufferSwitchTimeInfo when
+ the stream is stopped : Stephane Letz
+ 10-12-01 Correct the PaHost_CalcNumHostBuffers function: computes FramesPerHostBuffer to be the lowest that
+ respect requested FramesPerUserBuffer and userBuffersPerHostBuffer : Stephane Letz
+ 10-26-01 Management of hostBufferSize and userBufferSize of any size : Stephane Letz
+ 10-27-01 Improve calculus of hostBufferSize to be multiple or divisor of userBufferSize if possible : Stephane and Phil
+ 10-29-01 Change MAX_INT32_FP to (2147483520.0f) to prevent roundup to 0x80000000 : Phil Burk
+ 10-31-01 Clear the ouput buffer and user buffers in PaHost_StartOutput, correct bug in GetFirstMultiple : Stephane Letz
+ 11-06-01 Rename functions : Stephane Letz
+ 11-08-01 New Pa_ASIO_Adaptor_Init function to init Callback adpatation variables, cleanup of Pa_ASIO_Callback_Input: Stephane Letz
+ 11-29-01 Break apart device loading to debug random failure in Pa_ASIO_QueryDeviceInfo ; Phil Burk
+ 01-03-02 Desallocate all resources in PaHost_Term for cases where Pa_CloseStream is not called properly : Stephane Letz
+ 02-01-02 Cleanup, test of multiple-stream opening : Stephane Letz
+ 19-02-02 New Pa_ASIO_loadDriver that calls CoInitialize on each thread on Windows : Stephane Letz
+ 09-04-02 Correct error code management in PaHost_Term, removes various compiler warning : Stephane Letz
+ 12-04-02 Add Mac includes for <Devices.h> and <Timer.h> : Phil Burk
+ 13-04-02 Removes another compiler warning : Stephane Letz
+ 30-04-02 Pa_ASIO_QueryDeviceInfo bug correction, memory allocation checking, better error handling : D Viens, P Burk, S Letz
+ 12-06-02 Rehashed into new multi-api infrastructure, added support for all ASIO sample formats : Ross Bencina
+ 18-06-02 Added pa_asio.h, PaAsio_GetAvailableLatencyValues() : Ross B.
+ 21-06-02 Added SelectHostBufferSize() which selects host buffer size based on user latency parameters : Ross Bencina
+ ** NOTE maintanance history is now stored in CVS **
+*/
+
+/** @file
+
+ Note that specific support for paInputUnderflow, paOutputOverflow and
+ paNeverDropInput is not necessary or possible with this driver due to the
+ synchronous full duplex double-buffered architecture of ASIO.
+
+ @todo check that CoInitialize()/CoUninitialize() are always correctly
+ paired, even in error cases.
+
+ @todo implement host api specific extension to set i/o buffer sizes in frames
+
+ @todo implement ReadStream, WriteStream, GetStreamReadAvailable, GetStreamWriteAvailable
+
+ @todo implement IsFormatSupported
+
+ @todo work out how to implement stream stoppage from callback and
+ implement IsStreamActive properly. Stream stoppage could be implemented
+ using a high-priority thread blocked on an Event which is signalled
+ by the callback. Or, we could just call ASIO stop from the callback
+ and see what happens.
+
+ @todo rigorously check asio return codes and convert to pa error codes
+
+ @todo Different channels of a multichannel stream can have different sample
+ formats, but we assume that all are the same as the first channel for now.
+ Fixing this will require the block processor to maintain per-channel
+ conversion functions - could get nasty.
+
+ @todo investigate whether the asio processNow flag needs to be honoured
+
+ @todo handle asioMessages() callbacks in a useful way, or at least document
+ what cases we don't handle.
+
+ @todo miscellaneous other FIXMEs
+
+ @todo provide an asio-specific method for setting the systems specific
+ value (aka main window handle) - check that this matches the value
+ passed to PaAsio_ShowControlPanel, or remove it entirely from
+ PaAsio_ShowControlPanel. - this would allow PaAsio_ShowControlPanel
+ to be called for the currently open stream (at present all streams
+ must be closed).
+*/
+
+
+
+#include <stdio.h>
+#include <assert.h>
+#include <string.h>
+//#include <values.h>
+
+#include <windows.h>
+#include <mmsystem.h>
+
+#include "portaudio.h"
+#include "pa_asio.h"
+#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 "asiosys.h"
+#include "asio.h"
+#include "asiodrivers.h"
+#include "iasiothiscallresolver.h"
+
+/*
+#if MAC
+#include <Devices.h>
+#include <Timer.h>
+#include <Math64.h>
+#else
+*/
+/*
+#include <math.h>
+#include <windows.h>
+#include <mmsystem.h>
+*/
+/*
+#endif
+*/
+
+/* external references */
+extern AsioDrivers* asioDrivers ;
+bool loadAsioDriver(char *name);
+
+
+/* We are trying to be compatible with CARBON but this has not been thoroughly tested. */
+/* not tested at all since new code was introduced. */
+#define CARBON_COMPATIBLE (0)
+
+
+
+
+/* prototypes for functions declared in this file */
+
+extern "C" PaError PaAsio_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, const void *buffer, unsigned long frames );
+static signed long GetStreamReadAvailable( PaStream* stream );
+static signed long GetStreamWriteAvailable( PaStream* stream );
+
+/* our ASIO callback functions */
+
+static void bufferSwitch(long index, ASIOBool processNow);
+static ASIOTime *bufferSwitchTimeInfo(ASIOTime *timeInfo, long index, ASIOBool processNow);
+static void sampleRateChanged(ASIOSampleRate sRate);
+static long asioMessages(long selector, long value, void* message, double* opt);
+
+static ASIOCallbacks asioCallbacks_ =
+ { bufferSwitch, sampleRateChanged, asioMessages, bufferSwitchTimeInfo };
+
+
+#define PA_ASIO_SET_LAST_HOST_ERROR( errorCode, errorText ) \
+ PaUtil_SetLastHostErrorInfo( paASIO, errorCode, errorText )
+
+
+static void PaAsio_SetLastSystemError( DWORD errorCode )
+{
+ LPVOID lpMsgBuf;
+ FormatMessage(
+ FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
+ NULL,
+ errorCode,
+ MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+ (LPTSTR) &lpMsgBuf,
+ 0,
+ NULL
+ );
+ PaUtil_SetLastHostErrorInfo( paASIO, errorCode, (const char*)lpMsgBuf );
+ LocalFree( lpMsgBuf );
+}
+
+#define PA_ASIO_SET_LAST_SYSTEM_ERROR( errorCode ) \
+ PaAsio_SetLastSystemError( errorCode )
+
+
+static const char* PaAsio_GetAsioErrorText( ASIOError asioError )
+{
+ const char *result;
+
+ switch( asioError ){
+ case ASE_OK:
+ case ASE_SUCCESS: result = "Success"; break;
+ case ASE_NotPresent: result = "Hardware input or output is not present or available"; break;
+ case ASE_HWMalfunction: result = "Hardware is malfunctioning"; break;
+ case ASE_InvalidParameter: result = "Input parameter invalid"; break;
+ case ASE_InvalidMode: result = "Hardware is in a bad mode or used in a bad mode"; break;
+ case ASE_SPNotAdvancing: result = "Hardware is not running when sample position is inquired"; break;
+ case ASE_NoClock: result = "Sample clock or rate cannot be determined or is not present"; break;
+ case ASE_NoMemory: result = "Not enough memory for completing the request"; break;
+ default: result = "Unknown ASIO error"; break;
+ }
+
+ return result;
+}
+
+
+#define PA_ASIO_SET_LAST_ASIO_ERROR( asioError ) \
+ PaUtil_SetLastHostErrorInfo( paASIO, asioError, PaAsio_GetAsioErrorText( asioError ) )
+
+
+
+
+// Atomic increment and decrement operations
+#if MAC
+ /* need to be implemented on Mac */
+ inline long PaAsio_AtomicIncrement(volatile long* v) {return ++(*const_cast<long*>(v));}
+ inline long PaAsio_AtomicDecrement(volatile long* v) {return --(*const_cast<long*>(v));}
+#elif WINDOWS
+ inline long PaAsio_AtomicIncrement(volatile long* v) {return InterlockedIncrement(const_cast<long*>(v));}
+ inline long PaAsio_AtomicDecrement(volatile long* v) {return InterlockedDecrement(const_cast<long*>(v));}
+#endif
+
+
+
+typedef struct PaAsioDriverInfo
+{
+ ASIODriverInfo asioDriverInfo;
+ long inputChannelCount, outputChannelCount;
+ long bufferMinSize, bufferMaxSize, bufferPreferredSize, bufferGranularity;
+ bool postOutput;
+}
+PaAsioDriverInfo;
+
+
+/* PaAsioHostApiRepresentation - host api datastructure specific to this implementation */
+
+typedef struct
+{
+ PaUtilHostApiRepresentation inheritedHostApiRep;
+ PaUtilStreamInterface callbackStreamInterface;
+ PaUtilStreamInterface blockingStreamInterface;
+
+ PaUtilAllocationGroup *allocations;
+
+ void *systemSpecific;
+
+ /* the ASIO C API only allows one ASIO driver to be open at a time,
+ so we kee track of whether we have the driver open here, and
+ use this information to return errors from OpenStream if the
+ driver is already open.
+
+ openAsioDeviceIndex will be PaNoDevice if there is no device open
+ and a valid pa_asio (not global) device index otherwise.
+
+ openAsioDriverInfo is populated with the driver info for the
+ currently open device (if any)
+ */
+ PaDeviceIndex openAsioDeviceIndex;
+ PaAsioDriverInfo openAsioDriverInfo;
+}
+PaAsioHostApiRepresentation;
+
+
+/*
+ Retrieve <driverCount> driver names from ASIO, returned in a char**
+ allocated in <group>.
+*/
+static char **GetAsioDriverNames( PaUtilAllocationGroup *group, long driverCount )
+{
+ char **result = 0;
+ int i;
+
+ result =(char**)PaUtil_GroupAllocateMemory(
+ group, sizeof(char*) * driverCount );
+ if( !result )
+ goto error;
+
+ result[0] = (char*)PaUtil_GroupAllocateMemory(
+ group, 32 * driverCount );
+ if( !result[0] )
+ goto error;
+
+ for( i=0; i<driverCount; ++i )
+ result[i] = result[0] + (32 * i);
+
+ asioDrivers->getDriverNames( result, driverCount );
+
+error:
+ return result;
+}
+
+
+static PaSampleFormat AsioSampleTypeToPaNativeSampleFormat(ASIOSampleType type)
+{
+ switch (type) {
+ case ASIOSTInt16MSB:
+ case ASIOSTInt16LSB:
+ return paInt16;
+
+ case ASIOSTFloat32MSB:
+ case ASIOSTFloat32LSB:
+ case ASIOSTFloat64MSB:
+ case ASIOSTFloat64LSB:
+ return paFloat32;
+
+ case ASIOSTInt32MSB:
+ case ASIOSTInt32LSB:
+ case ASIOSTInt32MSB16:
+ case ASIOSTInt32LSB16:
+ case ASIOSTInt32MSB18:
+ case ASIOSTInt32MSB20:
+ case ASIOSTInt32MSB24:
+ case ASIOSTInt32LSB18:
+ case ASIOSTInt32LSB20:
+ case ASIOSTInt32LSB24:
+ return paInt32;
+
+ case ASIOSTInt24MSB:
+ case ASIOSTInt24LSB:
+ return paInt24;
+
+ default:
+ return paCustomFormat;
+ }
+}
+
+
+static int BytesPerAsioSample( ASIOSampleType sampleType )
+{
+ switch (sampleType) {
+ case ASIOSTInt16MSB:
+ case ASIOSTInt16LSB:
+ return 2;
+
+ case ASIOSTFloat64MSB:
+ case ASIOSTFloat64LSB:
+ return 8;
+
+ case ASIOSTFloat32MSB:
+ case ASIOSTFloat32LSB:
+ case ASIOSTInt32MSB:
+ case ASIOSTInt32LSB:
+ case ASIOSTInt32MSB16:
+ case ASIOSTInt32LSB16:
+ case ASIOSTInt32MSB18:
+ case ASIOSTInt32MSB20:
+ case ASIOSTInt32MSB24:
+ case ASIOSTInt32LSB18:
+ case ASIOSTInt32LSB20:
+ case ASIOSTInt32LSB24:
+ return 4;
+
+ case ASIOSTInt24MSB:
+ case ASIOSTInt24LSB:
+ return 3;
+
+ default:
+ return 0;
+ }
+}
+
+
+static void Swap16( void *buffer, long shift, long count )
+{
+ unsigned short *p = (unsigned short*)buffer;
+ unsigned short temp;
+ (void) shift; /* unused parameter */
+
+ while( count-- )
+ {
+ temp = *p;
+ *p++ = (unsigned short)((temp<<8) | (temp>>8));
+ }
+}
+
+static void Swap24( void *buffer, long shift, long count )
+{
+ unsigned char *p = (unsigned char*)buffer;
+ unsigned char temp;
+ (void) shift; /* unused parameter */
+
+ while( count-- )
+ {
+ temp = *p;
+ *p = *(p+2);
+ *(p+2) = temp;
+ p += 3;
+ }
+}
+
+#define PA_SWAP32_( x ) ((x>>24) | ((x>>8)&0xFF00) | ((x<<8)&0xFF0000) | (x<<24));
+
+static void Swap32( void *buffer, long shift, long count )
+{
+ unsigned long *p = (unsigned long*)buffer;
+ unsigned long temp;
+ (void) shift; /* unused parameter */
+
+ while( count-- )
+ {
+ temp = *p;
+ *p++ = PA_SWAP32_( temp);
+ }
+}
+
+static void SwapShiftLeft32( void *buffer, long shift, long count )
+{
+ unsigned long *p = (unsigned long*)buffer;
+ unsigned long temp;
+
+ while( count-- )
+ {
+ temp = *p;
+ temp = PA_SWAP32_( temp);
+ *p++ = temp << shift;
+ }
+}
+
+static void ShiftRightSwap32( void *buffer, long shift, long count )
+{
+ unsigned long *p = (unsigned long*)buffer;
+ unsigned long temp;
+
+ while( count-- )
+ {
+ temp = *p >> shift;
+ *p++ = PA_SWAP32_( temp);
+ }
+}
+
+static void ShiftLeft32( void *buffer, long shift, long count )
+{
+ unsigned long *p = (unsigned long*)buffer;
+ unsigned long temp;
+
+ while( count-- )
+ {
+ temp = *p;
+ *p++ = temp << shift;
+ }
+}
+
+static void ShiftRight32( void *buffer, long shift, long count )
+{
+ unsigned long *p = (unsigned long*)buffer;
+ unsigned long temp;
+
+ while( count-- )
+ {
+ temp = *p;
+ *p++ = temp >> shift;
+ }
+}
+
+#define PA_SWAP_( x, y ) temp=x; x = y; y = temp;
+
+static void Swap64ConvertFloat64ToFloat32( void *buffer, long shift, long count )
+{
+ double *in = (double*)buffer;
+ float *out = (float*)buffer;
+ unsigned char *p;
+ unsigned char temp;
+ (void) shift; /* unused parameter */
+
+ while( count-- )
+ {
+ p = (unsigned char*)in;
+ PA_SWAP_( p[0], p[7] );
+ PA_SWAP_( p[1], p[6] );
+ PA_SWAP_( p[2], p[5] );
+ PA_SWAP_( p[3], p[4] );
+
+ *out++ = (float) (*in++);
+ }
+}
+
+static void ConvertFloat64ToFloat32( void *buffer, long shift, long count )
+{
+ double *in = (double*)buffer;
+ float *out = (float*)buffer;
+ (void) shift; /* unused parameter */
+
+ while( count-- )
+ *out++ = (float) (*in++);
+}
+
+static void ConvertFloat32ToFloat64Swap64( void *buffer, long shift, long count )
+{
+ float *in = ((float*)buffer) + (count-1);
+ double *out = ((double*)buffer) + (count-1);
+ unsigned char *p;
+ unsigned char temp;
+ (void) shift; /* unused parameter */
+
+ while( count-- )
+ {
+ *out = *in--;
+
+ p = (unsigned char*)out;
+ PA_SWAP_( p[0], p[7] );
+ PA_SWAP_( p[1], p[6] );
+ PA_SWAP_( p[2], p[5] );
+ PA_SWAP_( p[3], p[4] );
+
+ out--;
+ }
+}
+
+static void ConvertFloat32ToFloat64( void *buffer, long shift, long count )
+{
+ float *in = ((float*)buffer) + (count-1);
+ double *out = ((double*)buffer) + (count-1);
+ (void) shift; /* unused parameter */
+
+ while( count-- )
+ *out-- = *in--;
+}
+
+#ifdef MAC
+#define PA_MSB_IS_NATIVE_
+#undef PA_LSB_IS_NATIVE_
+#endif
+
+#ifdef WINDOWS
+#undef PA_MSB_IS_NATIVE_
+#define PA_LSB_IS_NATIVE_
+#endif
+
+typedef void PaAsioBufferConverter( void *, long, long );
+
+static void SelectAsioToPaConverter( ASIOSampleType type, PaAsioBufferConverter **converter, long *shift )
+{
+ *shift = 0;
+ *converter = 0;
+
+ switch (type) {
+ case ASIOSTInt16MSB:
+ /* dest: paInt16, no conversion necessary, possible byte swap*/
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = Swap16;
+ #endif
+ break;
+ case ASIOSTInt16LSB:
+ /* dest: paInt16, no conversion necessary, possible byte swap*/
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = Swap16;
+ #endif
+ break;
+ case ASIOSTFloat32MSB:
+ /* dest: paFloat32, no conversion necessary, possible byte swap*/
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = Swap32;
+ #endif
+ break;
+ case ASIOSTFloat32LSB:
+ /* dest: paFloat32, no conversion necessary, possible byte swap*/
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = Swap32;
+ #endif
+ break;
+ case ASIOSTFloat64MSB:
+ /* dest: paFloat32, in-place conversion to/from float32, possible byte swap*/
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = Swap64ConvertFloat64ToFloat32;
+ #else
+ *converter = ConvertFloat64ToFloat32;
+ #endif
+ break;
+ case ASIOSTFloat64LSB:
+ /* dest: paFloat32, in-place conversion to/from float32, possible byte swap*/
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = Swap64ConvertFloat64ToFloat32;
+ #else
+ *converter = ConvertFloat64ToFloat32;
+ #endif
+ break;
+ case ASIOSTInt32MSB:
+ /* dest: paInt32, no conversion necessary, possible byte swap */
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = Swap32;
+ #endif
+ break;
+ case ASIOSTInt32LSB:
+ /* dest: paInt32, no conversion necessary, possible byte swap */
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = Swap32;
+ #endif
+ break;
+ case ASIOSTInt32MSB16:
+ /* dest: paInt32, 16 bit shift, possible byte swap */
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = SwapShiftLeft32;
+ #else
+ *converter = ShiftLeft32;
+ #endif
+ *shift = 16;
+ break;
+ case ASIOSTInt32MSB18:
+ /* dest: paInt32, 14 bit shift, possible byte swap */
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = SwapShiftLeft32;
+ #else
+ *converter = ShiftLeft32;
+ #endif
+ *shift = 14;
+ break;
+ case ASIOSTInt32MSB20:
+ /* dest: paInt32, 12 bit shift, possible byte swap */
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = SwapShiftLeft32;
+ #else
+ *converter = ShiftLeft32;
+ #endif
+ *shift = 12;
+ break;
+ case ASIOSTInt32MSB24:
+ /* dest: paInt32, 8 bit shift, possible byte swap */
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = SwapShiftLeft32;
+ #else
+ *converter = ShiftLeft32;
+ #endif
+ *shift = 8;
+ break;
+ case ASIOSTInt32LSB16:
+ /* dest: paInt32, 16 bit shift, possible byte swap */
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = SwapShiftLeft32;
+ #else
+ *converter = ShiftLeft32;
+ #endif
+ *shift = 16;
+ break;
+ case ASIOSTInt32LSB18:
+ /* dest: paInt32, 14 bit shift, possible byte swap */
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = SwapShiftLeft32;
+ #else
+ *converter = ShiftLeft32;
+ #endif
+ *shift = 14;
+ break;
+ case ASIOSTInt32LSB20:
+ /* dest: paInt32, 12 bit shift, possible byte swap */
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = SwapShiftLeft32;
+ #else
+ *converter = ShiftLeft32;
+ #endif
+ *shift = 12;
+ break;
+ case ASIOSTInt32LSB24:
+ /* dest: paInt32, 8 bit shift, possible byte swap */
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = SwapShiftLeft32;
+ #else
+ *converter = ShiftLeft32;
+ #endif
+ *shift = 8;
+ break;
+ case ASIOSTInt24MSB:
+ /* dest: paInt24, no conversion necessary, possible byte swap */
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = Swap24;
+ #endif
+ break;
+ case ASIOSTInt24LSB:
+ /* dest: paInt24, no conversion necessary, possible byte swap */
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = Swap24;
+ #endif
+ break;
+ }
+}
+
+
+static void SelectPaToAsioConverter( ASIOSampleType type, PaAsioBufferConverter **converter, long *shift )
+{
+ *shift = 0;
+ *converter = 0;
+
+ switch (type) {
+ case ASIOSTInt16MSB:
+ /* src: paInt16, no conversion necessary, possible byte swap*/
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = Swap16;
+ #endif
+ break;
+ case ASIOSTInt16LSB:
+ /* src: paInt16, no conversion necessary, possible byte swap*/
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = Swap16;
+ #endif
+ break;
+ case ASIOSTFloat32MSB:
+ /* src: paFloat32, no conversion necessary, possible byte swap*/
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = Swap32;
+ #endif
+ break;
+ case ASIOSTFloat32LSB:
+ /* src: paFloat32, no conversion necessary, possible byte swap*/
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = Swap32;
+ #endif
+ break;
+ case ASIOSTFloat64MSB:
+ /* src: paFloat32, in-place conversion to/from float32, possible byte swap*/
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = ConvertFloat32ToFloat64Swap64;
+ #else
+ *converter = ConvertFloat32ToFloat64;
+ #endif
+ break;
+ case ASIOSTFloat64LSB:
+ /* src: paFloat32, in-place conversion to/from float32, possible byte swap*/
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = ConvertFloat32ToFloat64Swap64;
+ #else
+ *converter = ConvertFloat32ToFloat64;
+ #endif
+ break;
+ case ASIOSTInt32MSB:
+ /* src: paInt32, no conversion necessary, possible byte swap */
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = Swap32;
+ #endif
+ break;
+ case ASIOSTInt32LSB:
+ /* src: paInt32, no conversion necessary, possible byte swap */
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = Swap32;
+ #endif
+ break;
+ case ASIOSTInt32MSB16:
+ /* src: paInt32, 16 bit shift, possible byte swap */
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = ShiftRightSwap32;
+ #else
+ *converter = ShiftRight32;
+ #endif
+ *shift = 16;
+ break;
+ case ASIOSTInt32MSB18:
+ /* src: paInt32, 14 bit shift, possible byte swap */
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = ShiftRightSwap32;
+ #else
+ *converter = ShiftRight32;
+ #endif
+ *shift = 14;
+ break;
+ case ASIOSTInt32MSB20:
+ /* src: paInt32, 12 bit shift, possible byte swap */
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = ShiftRightSwap32;
+ #else
+ *converter = ShiftRight32;
+ #endif
+ *shift = 12;
+ break;
+ case ASIOSTInt32MSB24:
+ /* src: paInt32, 8 bit shift, possible byte swap */
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = ShiftRightSwap32;
+ #else
+ *converter = ShiftRight32;
+ #endif
+ *shift = 8;
+ break;
+ case ASIOSTInt32LSB16:
+ /* src: paInt32, 16 bit shift, possible byte swap */
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = ShiftRightSwap32;
+ #else
+ *converter = ShiftRight32;
+ #endif
+ *shift = 16;
+ break;
+ case ASIOSTInt32LSB18:
+ /* src: paInt32, 14 bit shift, possible byte swap */
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = ShiftRightSwap32;
+ #else
+ *converter = ShiftRight32;
+ #endif
+ *shift = 14;
+ break;
+ case ASIOSTInt32LSB20:
+ /* src: paInt32, 12 bit shift, possible byte swap */
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = ShiftRightSwap32;
+ #else
+ *converter = ShiftRight32;
+ #endif
+ *shift = 12;
+ break;
+ case ASIOSTInt32LSB24:
+ /* src: paInt32, 8 bit shift, possible byte swap */
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = ShiftRightSwap32;
+ #else
+ *converter = ShiftRight32;
+ #endif
+ *shift = 8;
+ break;
+ case ASIOSTInt24MSB:
+ /* src: paInt24, no conversion necessary, possible byte swap */
+ #ifdef PA_LSB_IS_NATIVE_
+ *converter = Swap24;
+ #endif
+ break;
+ case ASIOSTInt24LSB:
+ /* src: paInt24, no conversion necessary, possible byte swap */
+ #ifdef PA_MSB_IS_NATIVE_
+ *converter = Swap24;
+ #endif
+ break;
+ }
+}
+
+
+typedef struct PaAsioDeviceInfo
+{
+ PaDeviceInfo commonDeviceInfo;
+ long minBufferSize;
+ long maxBufferSize;
+ long preferredBufferSize;
+ long bufferGranularity;
+}
+PaAsioDeviceInfo;
+
+
+PaError PaAsio_GetAvailableLatencyValues( PaDeviceIndex device,
+ long *minLatency, long *maxLatency, long *preferredLatency, long *granularity )
+{
+ PaError result;
+ PaUtilHostApiRepresentation *hostApi;
+ PaDeviceIndex hostApiDevice;
+
+ result = PaUtil_GetHostApiRepresentation( &hostApi, paASIO );
+
+ if( result == paNoError )
+ {
+ result = PaUtil_DeviceIndexToHostApiDeviceIndex( &hostApiDevice, device, hostApi );
+
+ if( result == paNoError )
+ {
+ PaAsioDeviceInfo *asioDeviceInfo =
+ (PaAsioDeviceInfo*)hostApi->deviceInfos[hostApiDevice];
+
+ *minLatency = asioDeviceInfo->minBufferSize;
+ *maxLatency = asioDeviceInfo->maxBufferSize;
+ *preferredLatency = asioDeviceInfo->preferredBufferSize;
+ *granularity = asioDeviceInfo->bufferGranularity;
+ }
+ }
+
+ return result;
+}
+
+
+
+/*
+ load the asio driver named by <driverName> and return statistics about
+ the driver in info. If no error occurred, the driver will remain open
+ and must be closed by the called by calling ASIOExit() - if an error
+ is returned the driver will already be closed.
+*/
+static PaError LoadAsioDriver( const char *driverName,
+ PaAsioDriverInfo *driverInfo, void *systemSpecific )
+{
+ PaError result = paNoError;
+ ASIOError asioError;
+ int asioIsInitialized = 0;
+
+ if( !loadAsioDriver( const_cast<char*>(driverName) ) )
+ {
+ result = paUnanticipatedHostError;
+ PA_ASIO_SET_LAST_HOST_ERROR( 0, "Failed to load ASIO driver" );
+ goto error;
+ }
+
+ memset( &driverInfo->asioDriverInfo, 0, sizeof(ASIODriverInfo) );
+ driverInfo->asioDriverInfo.asioVersion = 2;
+ driverInfo->asioDriverInfo.sysRef = systemSpecific;
+ if( (asioError = ASIOInit( &driverInfo->asioDriverInfo )) != ASE_OK )
+ {
+ result = paUnanticipatedHostError;
+ PA_ASIO_SET_LAST_ASIO_ERROR( asioError );
+ goto error;
+ }
+ else
+ {
+ asioIsInitialized = 1;
+ }
+
+ if( (asioError = ASIOGetChannels(&driverInfo->inputChannelCount,
+ &driverInfo->outputChannelCount)) != ASE_OK )
+ {
+ result = paUnanticipatedHostError;
+ PA_ASIO_SET_LAST_ASIO_ERROR( asioError );
+ goto error;
+ }
+
+ if( (asioError = ASIOGetBufferSize(&driverInfo->bufferMinSize,
+ &driverInfo->bufferMaxSize, &driverInfo->bufferPreferredSize,
+ &driverInfo->bufferGranularity)) != ASE_OK )
+ {
+ result = paUnanticipatedHostError;
+ PA_ASIO_SET_LAST_ASIO_ERROR( asioError );
+ goto error;
+ }
+
+ if( ASIOOutputReady() == ASE_OK )
+ driverInfo->postOutput = true;
+ else
+ driverInfo->postOutput = false;
+
+ return result;
+
+error:
+ if( asioIsInitialized )
+ ASIOExit();
+
+ return result;
+}
+
+
+#define PA_DEFAULTSAMPLERATESEARCHORDER_COUNT_ 13 /* must be the same number of elements as in the array below */
+static ASIOSampleRate defaultSampleRateSearchOrder_[]
+ = {44100.0, 48000.0, 32000.0, 24000.0, 22050.0, 88200.0, 96000.0,
+ 192000.0, 16000.0, 12000.0, 11025.0, 96000.0, 8000.0 };
+
+
+PaError PaAsio_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIndex hostApiIndex )
+{
+ PaError result = paNoError;
+ int i, driverCount;
+ PaAsioHostApiRepresentation *asioHostApi;
+ PaAsioDeviceInfo *deviceInfoArray;
+ char **names;
+ PaAsioDriverInfo paAsioDriverInfo;
+ ASIOChannelInfo asioChannelInfo;
+
+ asioHostApi = (PaAsioHostApiRepresentation*)PaUtil_AllocateMemory( sizeof(PaAsioHostApiRepresentation) );
+ if( !asioHostApi )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ asioHostApi->allocations = PaUtil_CreateAllocationGroup();
+ if( !asioHostApi->allocations )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ asioHostApi->systemSpecific = 0;
+ asioHostApi->openAsioDeviceIndex = paNoDevice;
+
+ *hostApi = &asioHostApi->inheritedHostApiRep;
+ (*hostApi)->info.structVersion = 1;
+
+ (*hostApi)->info.type = paASIO;
+ (*hostApi)->info.name = "ASIO";
+ (*hostApi)->info.deviceCount = 0;
+
+ #ifdef WINDOWS
+ /* use desktop window as system specific ptr */
+ asioHostApi->systemSpecific = GetDesktopWindow();
+ CoInitialize(NULL);
+ #endif
+
+ /* MUST BE CHECKED : to force fragments loading on Mac */
+ loadAsioDriver( "dummy" );
+
+ /* driverCount is the number of installed drivers - not necessarily
+ the number of installed physical devices. */
+ #if MAC
+ driverCount = asioDrivers->getNumFragments();
+ #elif WINDOWS
+ driverCount = asioDrivers->asioGetNumDev();
+ #endif
+
+ if( driverCount > 0 )
+ {
+ names = GetAsioDriverNames( asioHostApi->allocations, driverCount );
+ if( !names )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+
+ /* allocate enough space for all drivers, even if some aren't installed */
+
+ (*hostApi)->deviceInfos = (PaDeviceInfo**)PaUtil_GroupAllocateMemory(
+ asioHostApi->allocations, sizeof(PaDeviceInfo*) * driverCount );
+ if( !(*hostApi)->deviceInfos )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ /* allocate all device info structs in a contiguous block */
+ deviceInfoArray = (PaAsioDeviceInfo*)PaUtil_GroupAllocateMemory(
+ asioHostApi->allocations, sizeof(PaAsioDeviceInfo) * driverCount );
+ if( !deviceInfoArray )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ for( i=0; i < driverCount; ++i )
+ {
+ /* Attempt to load the asio driver... */
+ if( LoadAsioDriver( names[i], &paAsioDriverInfo, asioHostApi->systemSpecific ) == paNoError )
+ {
+ PaAsioDeviceInfo *asioDeviceInfo = &deviceInfoArray[ (*hostApi)->info.deviceCount ];
+ PaDeviceInfo *deviceInfo = &asioDeviceInfo->commonDeviceInfo;
+
+ deviceInfo->structVersion = 2;
+ deviceInfo->hostApi = hostApiIndex;
+
+ deviceInfo->name = names[i];
+ PA_DEBUG(("PaAsio_Initialize: drv:%d name = %s\n", i,deviceInfo->name));
+
+ deviceInfo->maxInputChannels = paAsioDriverInfo.inputChannelCount;
+ deviceInfo->maxOutputChannels = paAsioDriverInfo.outputChannelCount;
+
+ PA_DEBUG(("PaAsio_Initialize: drv:%d inputChannels = %d\n", i, paAsioDriverInfo.inputChannelCount));
+ PA_DEBUG(("PaAsio_Initialize: drv:%d outputChannels = %d\n", i, paAsioDriverInfo.outputChannelCount));
+
+ deviceInfo->defaultSampleRate = 0.;
+ bool foundDefaultSampleRate = false;
+ for( int j=0; j < PA_DEFAULTSAMPLERATESEARCHORDER_COUNT_; ++j )
+ {
+ ASIOError asioError = ASIOCanSampleRate( defaultSampleRateSearchOrder_[j] );
+ if( asioError != ASE_NoClock && asioError != ASE_NotPresent )
+ {
+ deviceInfo->defaultSampleRate = defaultSampleRateSearchOrder_[j];
+ foundDefaultSampleRate = true;
+ break;
+ }
+ }
+
+ PA_DEBUG(("PaAsio_Initialize: drv:%d defaultSampleRate = %f\n", i, deviceInfo->defaultSampleRate));
+
+ if( foundDefaultSampleRate ){
+
+ /* calculate default latency values from bufferPreferredSize
+ for default low latency, and bufferPreferredSize * 3
+ for default high latency.
+ use the default sample rate to convert from samples to
+ seconds. Without knowing what sample rate the user will
+ use this is the best we can do.
+ */
+
+ double defaultLowLatency =
+ paAsioDriverInfo.bufferPreferredSize / deviceInfo->defaultSampleRate;
+
+ deviceInfo->defaultLowInputLatency = defaultLowLatency;
+ deviceInfo->defaultLowOutputLatency = defaultLowLatency;
+
+ long defaultHighLatencyBufferSize =
+ paAsioDriverInfo.bufferPreferredSize * 3;
+
+ if( defaultHighLatencyBufferSize > paAsioDriverInfo.bufferMaxSize )
+ defaultHighLatencyBufferSize = paAsioDriverInfo.bufferMaxSize;
+
+ double defaultHighLatency =
+ defaultHighLatencyBufferSize / deviceInfo->defaultSampleRate;
+
+ if( defaultHighLatency < defaultLowLatency )
+ defaultHighLatency = defaultLowLatency; /* just incase the driver returns something strange */
+
+ deviceInfo->defaultHighInputLatency = defaultHighLatency;
+ deviceInfo->defaultHighOutputLatency = defaultHighLatency;
+
+ }else{
+
+ deviceInfo->defaultLowInputLatency = 0.;
+ deviceInfo->defaultLowOutputLatency = 0.;
+ deviceInfo->defaultHighInputLatency = 0.;
+ deviceInfo->defaultHighOutputLatency = 0.;
+ }
+
+ PA_DEBUG(("PaAsio_Initialize: drv:%d defaultLowInputLatency = %f\n", i, deviceInfo->defaultLowInputLatency));
+ PA_DEBUG(("PaAsio_Initialize: drv:%d defaultLowOutputLatency = %f\n", i, deviceInfo->defaultLowOutputLatency));
+ PA_DEBUG(("PaAsio_Initialize: drv:%d defaultHighInputLatency = %f\n", i, deviceInfo->defaultHighInputLatency));
+ PA_DEBUG(("PaAsio_Initialize: drv:%d defaultHighOutputLatency = %f\n", i, deviceInfo->defaultHighOutputLatency));
+
+ asioDeviceInfo->minBufferSize = paAsioDriverInfo.bufferMinSize;
+ asioDeviceInfo->maxBufferSize = paAsioDriverInfo.bufferMaxSize;
+ asioDeviceInfo->preferredBufferSize = paAsioDriverInfo.bufferPreferredSize;
+ asioDeviceInfo->bufferGranularity = paAsioDriverInfo.bufferGranularity;
+
+
+ /* We assume that all channels have the same SampleType, so check the first, FIXME, probably shouldn't assume that */
+ asioChannelInfo.channel = 0;
+ asioChannelInfo.isInput = 1;
+ ASIOGetChannelInfo( &asioChannelInfo ); /* FIXME, check return code */
+
+
+ /* unload the driver */
+ ASIOExit();
+
+ (*hostApi)->deviceInfos[ (*hostApi)->info.deviceCount ] = deviceInfo;
+ ++(*hostApi)->info.deviceCount;
+ }
+ }
+ }
+
+ if( (*hostApi)->info.deviceCount > 0 )
+ {
+ (*hostApi)->info.defaultInputDevice = 0;
+ (*hostApi)->info.defaultOutputDevice = 0;
+ }
+ else
+ {
+ (*hostApi)->info.defaultInputDevice = paNoDevice;
+ (*hostApi)->info.defaultOutputDevice = paNoDevice;
+ }
+
+
+ (*hostApi)->Terminate = Terminate;
+ (*hostApi)->OpenStream = OpenStream;
+ (*hostApi)->IsFormatSupported = IsFormatSupported;
+
+ PaUtil_InitializeStreamInterface( &asioHostApi->callbackStreamInterface, CloseStream, StartStream,
+ StopStream, AbortStream, IsStreamStopped, IsStreamActive,
+ GetStreamTime, GetStreamCpuLoad,
+ PaUtil_DummyRead, PaUtil_DummyWrite,
+ PaUtil_DummyGetReadAvailable, PaUtil_DummyGetWriteAvailable );
+
+ PaUtil_InitializeStreamInterface( &asioHostApi->blockingStreamInterface, CloseStream, StartStream,
+ StopStream, AbortStream, IsStreamStopped, IsStreamActive,
+ GetStreamTime, PaUtil_DummyGetCpuLoad,
+ ReadStream, WriteStream, GetStreamReadAvailable, GetStreamWriteAvailable );
+
+ return result;
+
+error:
+ if( asioHostApi )
+ {
+ if( asioHostApi->allocations )
+ {
+ PaUtil_FreeAllAllocations( asioHostApi->allocations );
+ PaUtil_DestroyAllocationGroup( asioHostApi->allocations );
+ }
+
+ PaUtil_FreeMemory( asioHostApi );
+ }
+ return result;
+}
+
+
+static void Terminate( struct PaUtilHostApiRepresentation *hostApi )
+{
+ PaAsioHostApiRepresentation *asioHostApi = (PaAsioHostApiRepresentation*)hostApi;
+
+ /*
+ IMPLEMENT ME:
+ - clean up any resources not handled by the allocation group
+ */
+
+ if( asioHostApi->allocations )
+ {
+ PaUtil_FreeAllAllocations( asioHostApi->allocations );
+ PaUtil_DestroyAllocationGroup( asioHostApi->allocations );
+ }
+
+ PaUtil_FreeMemory( asioHostApi );
+}
+
+
+static PaError IsFormatSupported( struct PaUtilHostApiRepresentation *hostApi,
+ const PaStreamParameters *inputParameters,
+ const PaStreamParameters *outputParameters,
+ double sampleRate )
+{
+ PaError result = paNoError;
+ PaAsioHostApiRepresentation *asioHostApi = (PaAsioHostApiRepresentation*)hostApi;
+ PaAsioDriverInfo *driverInfo = &asioHostApi->openAsioDriverInfo;
+ int inputChannelCount, outputChannelCount;
+ PaSampleFormat inputSampleFormat, outputSampleFormat;
+ PaDeviceIndex asioDeviceIndex;
+ ASIOError asioError;
+
+ if( inputParameters && outputParameters )
+ {
+ /* full duplex ASIO stream must use the same device for input and output */
+
+ if( inputParameters->device != outputParameters->device )
+ return paBadIODeviceCombination;
+ }
+
+ 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;
+
+ asioDeviceIndex = inputParameters->device;
+
+ /* 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;
+
+ asioDeviceIndex = outputParameters->device;
+
+ /* validate outputStreamInfo */
+ if( outputParameters->hostApiSpecificStreamInfo )
+ return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
+ }
+ else
+ {
+ outputChannelCount = 0;
+ }
+
+
+
+ /* if an ASIO device is open we can only get format information for the currently open device */
+
+ if( asioHostApi->openAsioDeviceIndex != paNoDevice
+ && asioHostApi->openAsioDeviceIndex != asioDeviceIndex )
+ {
+ return paDeviceUnavailable;
+ }
+
+
+ /* NOTE: we load the driver and use its current settings
+ rather than the ones in our device info structure which may be stale */
+
+ /* open the device if it's not already open */
+ if( asioHostApi->openAsioDeviceIndex == paNoDevice )
+ {
+ result = LoadAsioDriver( asioHostApi->inheritedHostApiRep.deviceInfos[ asioDeviceIndex ]->name,
+ driverInfo, asioHostApi->systemSpecific );
+ if( result != paNoError )
+ return result;
+ }
+
+ /* check that input device can support inputChannelCount */
+ if( inputChannelCount > 0 )
+ {
+ if( inputChannelCount > driverInfo->inputChannelCount )
+ {
+ result = paInvalidChannelCount;
+ goto done;
+ }
+ }
+
+ /* check that output device can support outputChannelCount */
+ if( outputChannelCount )
+ {
+ if( outputChannelCount > driverInfo->outputChannelCount )
+ {
+ result = paInvalidChannelCount;
+ goto done;
+ }
+ }
+
+ /* query for sample rate support */
+ asioError = ASIOCanSampleRate( sampleRate );
+ if( asioError == ASE_NoClock || asioError == ASE_NotPresent )
+ {
+ result = paInvalidSampleRate;
+ goto done;
+ }
+
+done:
+ /* close the device if it wasn't already open */
+ if( asioHostApi->openAsioDeviceIndex == paNoDevice )
+ {
+ ASIOExit(); /* not sure if we should check for errors here */
+ }
+
+ if( result == paNoError )
+ return paFormatIsSupported;
+ else
+ return result;
+}
+
+
+
+/* PaAsioStream - a stream data structure specifically for this implementation */
+
+typedef struct PaAsioStream
+{
+ PaUtilStreamRepresentation streamRepresentation;
+ PaUtilCpuLoadMeasurer cpuLoadMeasurer;
+ PaUtilBufferProcessor bufferProcessor;
+
+ PaAsioHostApiRepresentation *asioHostApi;
+ unsigned long framesPerHostCallback;
+
+ /* ASIO driver info - these may not be needed for the life of the stream,
+ but store them here until we work out how format conversion is going
+ to work. */
+
+ ASIOBufferInfo *asioBufferInfos;
+ ASIOChannelInfo *asioChannelInfos;
+ long inputLatency, outputLatency; // actual latencies returned by asio
+
+ long inputChannelCount, outputChannelCount;
+ bool postOutput;
+
+ void **bufferPtrs; /* this is carved up for inputBufferPtrs and outputBufferPtrs */
+ void **inputBufferPtrs[2];
+ void **outputBufferPtrs[2];
+
+ PaAsioBufferConverter *inputBufferConverter;
+ long inputShift;
+ PaAsioBufferConverter *outputBufferConverter;
+ long outputShift;
+
+ volatile bool stopProcessing;
+ int stopPlayoutCount;
+ HANDLE completedBuffersPlayedEvent;
+
+ bool streamFinishedCallbackCalled;
+ volatile int isActive;
+ volatile bool zeroOutput; /* all future calls to the callback will output silence */
+
+ volatile long reenterCount;
+ volatile long reenterError;
+
+ PaStreamCallbackFlags callbackFlags;
+}
+PaAsioStream;
+
+static PaAsioStream *theAsioStream = 0; /* due to ASIO sdk limitations there can be only one stream */
+
+
+static void ZeroOutputBuffers( PaAsioStream *stream, long index )
+{
+ int i;
+
+ for( i=0; i < stream->outputChannelCount; ++i )
+ {
+ void *buffer = stream->asioBufferInfos[ i + stream->inputChannelCount ].buffers[index];
+
+ int bytesPerSample = BytesPerAsioSample( stream->asioChannelInfos[ i + stream->inputChannelCount ].type );
+
+ memset( buffer, 0, stream->framesPerHostCallback * bytesPerSample );
+ }
+}
+
+
+static unsigned long SelectHostBufferSize( unsigned long suggestedLatencyFrames,
+ PaAsioDriverInfo *driverInfo )
+{
+ unsigned long result;
+
+ if( suggestedLatencyFrames == 0 )
+ {
+ result = driverInfo->bufferPreferredSize;
+ }
+ else{
+ if( suggestedLatencyFrames <= (unsigned long)driverInfo->bufferMinSize )
+ {
+ result = driverInfo->bufferMinSize;
+ }
+ else if( suggestedLatencyFrames >= (unsigned long)driverInfo->bufferMaxSize )
+ {
+ result = driverInfo->bufferMaxSize;
+ }
+ else
+ {
+ if( driverInfo->bufferGranularity == -1 )
+ {
+ /* power-of-two */
+ result = 2;
+
+ while( result < suggestedLatencyFrames )
+ result *= result;
+
+ if( result < (unsigned long)driverInfo->bufferMinSize )
+ result = driverInfo->bufferMinSize;
+
+ if( result > (unsigned long)driverInfo->bufferMaxSize )
+ result = driverInfo->bufferMaxSize;
+ }
+ else if( driverInfo->bufferGranularity == 0 )
+ {
+ /* the documentation states that bufferGranularity should be
+ zero when bufferMinSize, bufferMaxSize and
+ bufferPreferredSize are the same. We assume that is the case.
+ */
+
+ result = driverInfo->bufferPreferredSize;
+ }
+ else
+ {
+ /* modulo granularity */
+
+ unsigned long remainder =
+ suggestedLatencyFrames % driverInfo->bufferGranularity;
+
+ if( remainder == 0 )
+ {
+ result = suggestedLatencyFrames;
+ }
+ else
+ {
+ result = suggestedLatencyFrames
+ + (driverInfo->bufferGranularity - remainder);
+
+ if( result > (unsigned long)driverInfo->bufferMaxSize )
+ result = driverInfo->bufferMaxSize;
+ }
+ }
+ }
+ }
+
+ return result;
+}
+
+
+/* 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;
+ PaAsioHostApiRepresentation *asioHostApi = (PaAsioHostApiRepresentation*)hostApi;
+ PaAsioStream *stream = 0;
+ unsigned long framesPerHostBuffer;
+ int inputChannelCount, outputChannelCount;
+ PaSampleFormat inputSampleFormat, outputSampleFormat;
+ PaSampleFormat hostInputSampleFormat, hostOutputSampleFormat;
+ unsigned long suggestedInputLatencyFrames;
+ unsigned long suggestedOutputLatencyFrames;
+ PaDeviceIndex asioDeviceIndex;
+ ASIOError asioError;
+ int asioIsInitialized = 0;
+ int asioBuffersCreated = 0;
+ int completedBuffersPlayedEventInited = 0;
+ int i;
+ PaAsioDriverInfo *driverInfo;
+
+ /* unless we move to using lower level ASIO calls, we can only have
+ one device open at a time */
+ if( asioHostApi->openAsioDeviceIndex != paNoDevice )
+ return paDeviceUnavailable;
+
+ if( inputParameters && outputParameters )
+ {
+ /* full duplex ASIO stream must use the same device for input and output */
+
+ if( inputParameters->device != outputParameters->device )
+ return paBadIODeviceCombination;
+ }
+
+ if( inputParameters )
+ {
+ inputChannelCount = inputParameters->channelCount;
+ inputSampleFormat = inputParameters->sampleFormat;
+ suggestedInputLatencyFrames = (unsigned long)(inputParameters->suggestedLatency * sampleRate);
+
+ asioDeviceIndex = inputParameters->device;
+
+ /* unless alternate device specification is supported, reject the use of
+ paUseHostApiSpecificDeviceSpecification */
+ if( inputParameters->device == paUseHostApiSpecificDeviceSpecification )
+ return paInvalidDevice;
+
+ /* validate hostApiSpecificStreamInfo */
+ if( inputParameters->hostApiSpecificStreamInfo )
+ return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
+ }
+ else
+ {
+ inputChannelCount = 0;
+ inputSampleFormat = 0;
+ suggestedInputLatencyFrames = 0;
+ }
+
+ if( outputParameters )
+ {
+ outputChannelCount = outputParameters->channelCount;
+ outputSampleFormat = outputParameters->sampleFormat;
+ suggestedOutputLatencyFrames = (unsigned long)(outputParameters->suggestedLatency * sampleRate);
+
+ asioDeviceIndex = outputParameters->device;
+
+ /* unless alternate device specification is supported, reject the use of
+ paUseHostApiSpecificDeviceSpecification */
+ if( outputParameters->device == paUseHostApiSpecificDeviceSpecification )
+ return paInvalidDevice;
+
+ /* validate hostApiSpecificStreamInfo */
+ if( outputParameters->hostApiSpecificStreamInfo )
+ return paIncompatibleHostApiSpecificStreamInfo; /* this implementation doesn't use custom stream info */
+ }
+ else
+ {
+ outputChannelCount = 0;
+ outputSampleFormat = 0;
+ suggestedOutputLatencyFrames = 0;
+ }
+
+ driverInfo = &asioHostApi->openAsioDriverInfo;
+
+ /* NOTE: we load the driver and use its current settings
+ rather than the ones in our device info structure which may be stale */
+
+ result = LoadAsioDriver( asioHostApi->inheritedHostApiRep.deviceInfos[ asioDeviceIndex ]->name,
+ driverInfo, asioHostApi->systemSpecific );
+ if( result == paNoError )
+ asioIsInitialized = 1;
+ else
+ goto error;
+
+ /* check that input device can support inputChannelCount */
+ if( inputChannelCount > 0 )
+ {
+ if( inputChannelCount > driverInfo->inputChannelCount )
+ {
+ result = paInvalidChannelCount;
+ goto error;
+ }
+ }
+
+ /* check that output device can support outputChannelCount */
+ if( outputChannelCount )
+ {
+ if( outputChannelCount > driverInfo->outputChannelCount )
+ {
+ result = paInvalidChannelCount;
+ goto error;
+ }
+ }
+
+ /* Set sample rate */
+ if( ASIOSetSampleRate( sampleRate ) != ASE_OK )
+ {
+ result = paInvalidSampleRate;
+ goto error;
+ }
+
+ /*
+ IMPLEMENT ME:
+ - if a full duplex stream is requested, check that the combination
+ of input and output parameters is supported
+ */
+
+ /* validate platform specific flags */
+ if( (streamFlags & paPlatformSpecificFlags) != 0 )
+ return paInvalidFlag; /* unexpected platform specific flag */
+
+
+ stream = (PaAsioStream*)PaUtil_AllocateMemory( sizeof(PaAsioStream) );
+ if( !stream )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ stream->completedBuffersPlayedEvent = CreateEvent( NULL, TRUE, FALSE, NULL );
+ if( stream->completedBuffersPlayedEvent == NULL )
+ {
+ result = paUnanticipatedHostError;
+ PA_ASIO_SET_LAST_SYSTEM_ERROR( GetLastError() );
+ goto error;
+ }
+ completedBuffersPlayedEventInited = 1;
+
+
+ stream->asioBufferInfos = 0; /* for deallocation in error */
+ stream->asioChannelInfos = 0; /* for deallocation in error */
+ stream->bufferPtrs = 0; /* for deallocation in error */
+
+ if( streamCallback )
+ {
+ PaUtil_InitializeStreamRepresentation( &stream->streamRepresentation,
+ &asioHostApi->callbackStreamInterface, streamCallback, userData );
+ }
+ else
+ {
+ PaUtil_InitializeStreamRepresentation( &stream->streamRepresentation,
+ &asioHostApi->blockingStreamInterface, streamCallback, userData );
+ }
+
+
+ PaUtil_InitializeCpuLoadMeasurer( &stream->cpuLoadMeasurer, sampleRate );
+
+
+ stream->asioBufferInfos = (ASIOBufferInfo*)PaUtil_AllocateMemory(
+ sizeof(ASIOBufferInfo) * (inputChannelCount + outputChannelCount) );
+ if( !stream->asioBufferInfos )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+
+ for( i=0; i < inputChannelCount; ++i )
+ {
+ ASIOBufferInfo *info = &stream->asioBufferInfos[i];
+
+ info->isInput = ASIOTrue;
+ info->channelNum = i;
+ info->buffers[0] = info->buffers[1] = 0;
+ }
+
+ for( i=0; i < outputChannelCount; ++i ){
+ ASIOBufferInfo *info = &stream->asioBufferInfos[inputChannelCount+i];
+
+ info->isInput = ASIOFalse;
+ info->channelNum = i;
+ info->buffers[0] = info->buffers[1] = 0;
+ }
+
+
+ framesPerHostBuffer = SelectHostBufferSize(
+ (( suggestedInputLatencyFrames > suggestedOutputLatencyFrames )
+ ? suggestedInputLatencyFrames : suggestedOutputLatencyFrames),
+ driverInfo );
+
+ asioError = ASIOCreateBuffers( stream->asioBufferInfos,
+ inputChannelCount+outputChannelCount,
+ framesPerHostBuffer, &asioCallbacks_ );
+
+ if( asioError != ASE_OK
+ && framesPerHostBuffer != (unsigned long)driverInfo->bufferPreferredSize )
+ {
+ /*
+ Some buggy drivers (like the Hoontech DSP24) give incorrect
+ [min, preferred, max] values They should work with the preferred size
+ value, thus if Pa_ASIO_CreateBuffers fails with the hostBufferSize
+ computed in SelectHostBufferSize, we try again with the preferred size.
+ */
+
+ framesPerHostBuffer = driverInfo->bufferPreferredSize;
+
+ ASIOError asioError2 = ASIOCreateBuffers( stream->asioBufferInfos,
+ inputChannelCount+outputChannelCount,
+ framesPerHostBuffer, &asioCallbacks_ );
+ if( asioError2 == ASE_OK )
+ asioError = ASE_OK;
+ }
+
+ if( asioError != ASE_OK )
+ {
+ result = paUnanticipatedHostError;
+ PA_ASIO_SET_LAST_ASIO_ERROR( asioError );
+ goto error;
+ }
+
+ asioBuffersCreated = 1;
+
+ stream->asioChannelInfos = (ASIOChannelInfo*)PaUtil_AllocateMemory(
+ sizeof(ASIOChannelInfo) * (inputChannelCount + outputChannelCount) );
+ if( !stream->asioChannelInfos )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ for( i=0; i < inputChannelCount + outputChannelCount; ++i )
+ {
+ stream->asioChannelInfos[i].channel = stream->asioBufferInfos[i].channelNum;
+ stream->asioChannelInfos[i].isInput = stream->asioBufferInfos[i].isInput;
+ asioError = ASIOGetChannelInfo( &stream->asioChannelInfos[i] );
+ if( asioError != ASE_OK )
+ {
+ result = paUnanticipatedHostError;
+ PA_ASIO_SET_LAST_ASIO_ERROR( asioError );
+ goto error;
+ }
+ }
+
+ stream->bufferPtrs = (void**)PaUtil_AllocateMemory(
+ 2 * sizeof(void*) * (inputChannelCount + outputChannelCount) );
+ if( !stream->bufferPtrs )
+ {
+ result = paInsufficientMemory;
+ goto error;
+ }
+
+ if( inputChannelCount > 0 )
+ {
+ stream->inputBufferPtrs[0] = stream-> bufferPtrs;
+ stream->inputBufferPtrs[1] = &stream->bufferPtrs[inputChannelCount];
+
+ for( i=0; i<inputChannelCount; ++i )
+ {
+ stream->inputBufferPtrs[0][i] = stream->asioBufferInfos[i].buffers[0];
+ stream->inputBufferPtrs[1][i] = stream->asioBufferInfos[i].buffers[1];
+ }
+ }
+ else
+ {
+ stream->inputBufferPtrs[0] = 0;
+ stream->inputBufferPtrs[1] = 0;
+ }
+
+ if( outputChannelCount > 0 )
+ {
+ stream->outputBufferPtrs[0] = &stream->bufferPtrs[inputChannelCount*2];
+ stream->outputBufferPtrs[1] = &stream->bufferPtrs[inputChannelCount*2 + outputChannelCount];
+
+ for( i=0; i<outputChannelCount; ++i )
+ {
+ stream->outputBufferPtrs[0][i] = stream->asioBufferInfos[inputChannelCount+i].buffers[0];
+ stream->outputBufferPtrs[1][i] = stream->asioBufferInfos[inputChannelCount+i].buffers[1];
+ }
+ }
+ else
+ {
+ stream->outputBufferPtrs[0] = 0;
+ stream->outputBufferPtrs[1] = 0;
+ }
+
+ if( inputChannelCount > 0 )
+ {
+ /* FIXME: assume all channels use the same type for now */
+ ASIOSampleType inputType = stream->asioChannelInfos[0].type;
+
+ hostInputSampleFormat = AsioSampleTypeToPaNativeSampleFormat( inputType );
+
+ SelectAsioToPaConverter( inputType, &stream->inputBufferConverter, &stream->inputShift );
+ }
+ else
+ {
+ hostInputSampleFormat = 0;
+ stream->inputBufferConverter = 0;
+ }
+
+ if( outputChannelCount > 0 )
+ {
+ /* FIXME: assume all channels use the same type for now */
+ ASIOSampleType outputType = stream->asioChannelInfos[inputChannelCount].type;
+
+ hostOutputSampleFormat = AsioSampleTypeToPaNativeSampleFormat( outputType );
+
+ SelectPaToAsioConverter( outputType, &stream->outputBufferConverter, &stream->outputShift );
+ }
+ else
+ {
+ hostOutputSampleFormat = 0;
+ stream->outputBufferConverter = 0;
+ }
+
+ result = PaUtil_InitializeBufferProcessor( &stream->bufferProcessor,
+ inputChannelCount, inputSampleFormat, hostInputSampleFormat,
+ outputChannelCount, outputSampleFormat, hostOutputSampleFormat,
+ sampleRate, streamFlags, framesPerBuffer,
+ framesPerHostBuffer, paUtilFixedHostBufferSize,
+ streamCallback, userData );
+ if( result != paNoError )
+ goto error;
+
+
+ ASIOGetLatencies( &stream->inputLatency, &stream->outputLatency );
+
+ stream->streamRepresentation.streamInfo.inputLatency =
+ (double)( PaUtil_GetBufferProcessorInputLatency(&stream->bufferProcessor)
+ + stream->inputLatency) / sampleRate; // seconds
+ stream->streamRepresentation.streamInfo.outputLatency =
+ (double)( PaUtil_GetBufferProcessorOutputLatency(&stream->bufferProcessor)
+ + stream->outputLatency) / sampleRate; // seconds
+ stream->streamRepresentation.streamInfo.sampleRate = sampleRate;
+
+ // the code below prints the ASIO latency which doesn't include the
+ // buffer processor latency.
+ PA_DEBUG(("PaAsio : ASIO InputLatency = %ld latency = %ld msec \n",
+ stream->inputLatency,
+ (long)((stream->inputLatency*1000)/ sampleRate)));
+ PA_DEBUG(("PaAsio : ASIO OuputLatency = %ld latency = %ld msec \n",
+ stream->outputLatency,
+ (long)((stream->outputLatency*1000)/ sampleRate)));
+
+ stream->asioHostApi = asioHostApi;
+ stream->framesPerHostCallback = framesPerHostBuffer;
+
+ stream->inputChannelCount = inputChannelCount;
+ stream->outputChannelCount = outputChannelCount;
+ stream->postOutput = driverInfo->postOutput;
+ stream->isActive = 0;
+
+ asioHostApi->openAsioDeviceIndex = asioDeviceIndex;
+
+ *s = (PaStream*)stream;
+
+ return result;
+
+error:
+ if( stream )
+ {
+ if( completedBuffersPlayedEventInited )
+ CloseHandle( stream->completedBuffersPlayedEvent );
+
+ if( stream->asioBufferInfos )
+ PaUtil_FreeMemory( stream->asioBufferInfos );
+
+ if( stream->asioChannelInfos )
+ PaUtil_FreeMemory( stream->asioChannelInfos );
+
+ if( stream->bufferPtrs )
+ PaUtil_FreeMemory( stream->bufferPtrs );
+
+ PaUtil_FreeMemory( stream );
+ }
+
+ if( asioBuffersCreated )
+ ASIODisposeBuffers();
+
+ if( asioIsInitialized )
+ ASIOExit();
+
+ return result;
+}
+
+
+/*
+ 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;
+ PaAsioStream *stream = (PaAsioStream*)s;
+
+ /*
+ IMPLEMENT ME:
+ - additional stream closing + cleanup
+ */
+
+ PaUtil_TerminateBufferProcessor( &stream->bufferProcessor );
+ PaUtil_TerminateStreamRepresentation( &stream->streamRepresentation );
+
+ stream->asioHostApi->openAsioDeviceIndex = paNoDevice;
+
+ CloseHandle( stream->completedBuffersPlayedEvent );
+
+ PaUtil_FreeMemory( stream->asioBufferInfos );
+ PaUtil_FreeMemory( stream->asioChannelInfos );
+ PaUtil_FreeMemory( stream->bufferPtrs );
+ PaUtil_FreeMemory( stream );
+
+ ASIODisposeBuffers();
+ ASIOExit();
+
+ return result;
+}
+
+
+static void bufferSwitch(long index, ASIOBool directProcess)
+{
+//TAKEN FROM THE ASIO SDK
+
+ // the actual processing callback.
+ // Beware that this is normally in a seperate thread, hence be sure that
+ // you take care about thread synchronization. This is omitted here for
+ // simplicity.
+
+ // as this is a "back door" into the bufferSwitchTimeInfo a timeInfo needs
+ // to be created though it will only set the timeInfo.samplePosition and
+ // timeInfo.systemTime fields and the according flags
+
+ ASIOTime timeInfo;
+ memset( &timeInfo, 0, sizeof (timeInfo) );
+
+ // get the time stamp of the buffer, not necessary if no
+ // synchronization to other media is required
+ if( ASIOGetSamplePosition(&timeInfo.timeInfo.samplePosition, &timeInfo.timeInfo.systemTime) == ASE_OK)
+ timeInfo.timeInfo.flags = kSystemTimeValid | kSamplePositionValid;
+
+ // Call the real callback
+ bufferSwitchTimeInfo( &timeInfo, index, directProcess );
+}
+
+
+// conversion from 64 bit ASIOSample/ASIOTimeStamp to double float
+#if NATIVE_INT64
+ #define ASIO64toDouble(a) (a)
+#else
+ const double twoRaisedTo32 = 4294967296.;
+ #define ASIO64toDouble(a) ((a).lo + (a).hi * twoRaisedTo32)
+#endif
+
+static ASIOTime *bufferSwitchTimeInfo( ASIOTime *timeInfo, long index, ASIOBool directProcess )
+{
+ // the actual processing callback.
+ // Beware that this is normally in a seperate thread, hence be sure that
+ // you take care about thread synchronization.
+
+
+ /* The SDK says the following about the directProcess flag:
+ suggests to the host whether it should immediately start processing
+ (directProcess == ASIOTrue), or whether its process should be deferred
+ because the call comes from a very low level (for instance, a high level
+ priority interrupt), and direct processing would cause timing instabilities for
+ the rest of the system. If in doubt, directProcess should be set to ASIOFalse.
+
+ We just ignore directProcess. This could cause incompatibilities with
+ drivers which really don't want the audio processing to occur in this
+ callback, but none have been identified yet.
+ */
+
+ (void) directProcess; /* suppress unused parameter warning */
+
+#if 0
+ // store the timeInfo for later use
+ asioDriverInfo.tInfo = *timeInfo;
+
+ // get the time stamp of the buffer, not necessary if no
+ // synchronization to other media is required
+
+ if (timeInfo->timeInfo.flags & kSystemTimeValid)
+ asioDriverInfo.nanoSeconds = ASIO64toDouble(timeInfo->timeInfo.systemTime);
+ else
+ asioDriverInfo.nanoSeconds = 0;
+
+ if (timeInfo->timeInfo.flags & kSamplePositionValid)
+ asioDriverInfo.samples = ASIO64toDouble(timeInfo->timeInfo.samplePosition);
+ else
+ asioDriverInfo.samples = 0;
+
+ if (timeInfo->timeCode.flags & kTcValid)
+ asioDriverInfo.tcSamples = ASIO64toDouble(timeInfo->timeCode.timeCodeSamples);
+ else
+ asioDriverInfo.tcSamples = 0;
+
+ // get the system reference time
+ asioDriverInfo.sysRefTime = get_sys_reference_time();
+#endif
+
+#if 0
+ // a few debug messages for the Windows device driver developer
+ // tells you the time when driver got its interrupt and the delay until the app receives
+ // the event notification.
+ static double last_samples = 0;
+ char tmp[128];
+ sprintf (tmp, "diff: %d / %d ms / %d ms / %d samples \n", asioDriverInfo.sysRefTime - (long)(asioDriverInfo.nanoSeconds / 1000000.0), asioDriverInfo.sysRefTime, (long)(asioDriverInfo.nanoSeconds / 1000000.0), (long)(asioDriverInfo.samples - last_samples));
+ OutputDebugString (tmp);
+ last_samples = asioDriverInfo.samples;
+#endif
+
+
+ if( !theAsioStream )
+ return 0L;
+
+ // Keep sample position
+ // FIXME: asioDriverInfo.pahsc_NumFramesDone = timeInfo->timeInfo.samplePosition.lo;
+
+
+ // protect against reentrancy
+ if( PaAsio_AtomicIncrement(&theAsioStream->reenterCount) )
+ {
+ theAsioStream->reenterError++;
+ //DBUG(("bufferSwitchTimeInfo : reentrancy detection = %d\n", asioDriverInfo.reenterError));
+ return 0L;
+ }
+
+ int buffersDone = 0;
+
+ do
+ {
+ if( buffersDone > 0 )
+ {
+ // this is a reentered buffer, we missed processing it on time
+ // set the input overflow and output underflow flags as appropriate
+
+ if( theAsioStream->inputChannelCount > 0 )
+ theAsioStream->callbackFlags |= paInputOverflow;
+
+ if( theAsioStream->outputChannelCount > 0 )
+ theAsioStream->callbackFlags |= paOutputUnderflow;
+ }
+ else
+ {
+ if( theAsioStream->zeroOutput )
+ {
+ ZeroOutputBuffers( theAsioStream, index );
+
+ // Finally if the driver supports the ASIOOutputReady() optimization,
+ // do it here, all data are in place
+ if( theAsioStream->postOutput )
+ ASIOOutputReady();
+
+ if( theAsioStream->stopProcessing )
+ {
+ if( theAsioStream->stopPlayoutCount < 2 )
+ {
+ ++theAsioStream->stopPlayoutCount;
+ if( theAsioStream->stopPlayoutCount == 2 )
+ {
+ theAsioStream->isActive = 0;
+ if( theAsioStream->streamRepresentation.streamFinishedCallback != 0 )
+ theAsioStream->streamRepresentation.streamFinishedCallback( theAsioStream->streamRepresentation.userData );
+ theAsioStream->streamFinishedCallbackCalled = true;
+ SetEvent( theAsioStream->completedBuffersPlayedEvent );
+ }
+ }
+ }
+ }
+ else
+ {
+
+#if 0
+// test code to try to detect slip conditions... these may work on some systems
+// but neither of them work on the RME Digi96
+
+// check that sample delta matches buffer size (otherwise we must have skipped
+// a buffer.
+static double last_samples = -512;
+double samples;
+//if( timeInfo->timeCode.flags & kTcValid )
+// samples = ASIO64toDouble(timeInfo->timeCode.timeCodeSamples);
+//else
+ samples = ASIO64toDouble(timeInfo->timeInfo.samplePosition);
+int delta = samples - last_samples;
+//printf( "%d\n", delta);
+last_samples = samples;
+
+if( delta > theAsioStream->framesPerHostCallback )
+{
+ if( theAsioStream->inputChannelCount > 0 )
+ theAsioStream->callbackFlags |= paInputOverflow;
+
+ if( theAsioStream->outputChannelCount > 0 )
+ theAsioStream->callbackFlags |= paOutputUnderflow;
+}
+
+// check that the buffer index is not the previous index (which would indicate
+// that a buffer was skipped.
+static int previousIndex = 1;
+if( index == previousIndex )
+{
+ if( theAsioStream->inputChannelCount > 0 )
+ theAsioStream->callbackFlags |= paInputOverflow;
+
+ if( theAsioStream->outputChannelCount > 0 )
+ theAsioStream->callbackFlags |= paOutputUnderflow;
+}
+previousIndex = index;
+#endif
+
+ int i;
+
+ PaUtil_BeginCpuLoadMeasurement( &theAsioStream->cpuLoadMeasurer );
+
+ PaStreamCallbackTimeInfo paTimeInfo;
+
+ // asio systemTime is supposed to be measured according to the same
+ // clock as timeGetTime
+ paTimeInfo.currentTime = (ASIO64toDouble( timeInfo->timeInfo.systemTime ) * .000000001);
+ paTimeInfo.inputBufferAdcTime = paTimeInfo.currentTime - theAsioStream->streamRepresentation.streamInfo.inputLatency;
+ paTimeInfo.outputBufferDacTime = paTimeInfo.currentTime + theAsioStream->streamRepresentation.streamInfo.outputLatency;
+
+#if 1
+// detect underflows by checking inter-callback time > 2 buffer period
+static double previousTime = -1;
+if( previousTime > 0 ){
+
+ double delta = paTimeInfo.currentTime - previousTime;
+
+ if( delta >= 2. * (theAsioStream->framesPerHostCallback / theAsioStream->streamRepresentation.streamInfo.sampleRate) ){
+ if( theAsioStream->inputChannelCount > 0 )
+ theAsioStream->callbackFlags |= paInputOverflow;
+
+ if( theAsioStream->outputChannelCount > 0 )
+ theAsioStream->callbackFlags |= paOutputUnderflow;
+ }
+}
+previousTime = paTimeInfo.currentTime;
+#endif
+
+ // note that the above input and output times do not need to be
+ // adjusted for the latency of the buffer processor -- the buffer
+ // processor handles that.
+
+ if( theAsioStream->inputBufferConverter )
+ {
+ for( i=0; i<theAsioStream->inputChannelCount; i++ )
+ {
+ theAsioStream->inputBufferConverter( theAsioStream->inputBufferPtrs[index][i],
+ theAsioStream->inputShift, theAsioStream->framesPerHostCallback );
+ }
+ }
+
+ PaUtil_BeginBufferProcessing( &theAsioStream->bufferProcessor, &paTimeInfo, theAsioStream->callbackFlags );
+
+ /* reset status flags once they've been passed to the callback */
+ theAsioStream->callbackFlags = 0;
+
+ PaUtil_SetInputFrameCount( &theAsioStream->bufferProcessor, 0 /* default to host buffer size */ );
+ for( i=0; i<theAsioStream->inputChannelCount; ++i )
+ PaUtil_SetNonInterleavedInputChannel( &theAsioStream->bufferProcessor, i, theAsioStream->inputBufferPtrs[index][i] );
+
+ PaUtil_SetOutputFrameCount( &theAsioStream->bufferProcessor, 0 /* default to host buffer size */ );
+ for( i=0; i<theAsioStream->outputChannelCount; ++i )
+ PaUtil_SetNonInterleavedOutputChannel( &theAsioStream->bufferProcessor, i, theAsioStream->outputBufferPtrs[index][i] );
+
+ int callbackResult;
+ if( theAsioStream->stopProcessing )
+ callbackResult = paComplete;
+ else
+ callbackResult = paContinue;
+ unsigned long framesProcessed = PaUtil_EndBufferProcessing( &theAsioStream->bufferProcessor, &callbackResult );
+
+ if( theAsioStream->outputBufferConverter )
+ {
+ for( i=0; i<theAsioStream->outputChannelCount; i++ )
+ {
+ theAsioStream->outputBufferConverter( theAsioStream->outputBufferPtrs[index][i],
+ theAsioStream->outputShift, theAsioStream->framesPerHostCallback );
+ }
+ }
+
+ PaUtil_EndCpuLoadMeasurement( &theAsioStream->cpuLoadMeasurer, framesProcessed );
+
+ // Finally if the driver supports the ASIOOutputReady() optimization,
+ // do it here, all data are in place
+ if( theAsioStream->postOutput )
+ ASIOOutputReady();
+
+ if( callbackResult == paContinue )
+ {
+ /* nothing special to do */
+ }
+ else if( callbackResult == paAbort )
+ {
+ /* finish playback immediately */
+ theAsioStream->isActive = 0;
+ if( theAsioStream->streamRepresentation.streamFinishedCallback != 0 )
+ theAsioStream->streamRepresentation.streamFinishedCallback( theAsioStream->streamRepresentation.userData );
+ theAsioStream->streamFinishedCallbackCalled = true;
+ SetEvent( theAsioStream->completedBuffersPlayedEvent );
+ theAsioStream->zeroOutput = true;
+ }
+ else /* paComplete or other non-zero value indicating complete */
+ {
+ /* Finish playback once currently queued audio has completed. */
+ theAsioStream->stopProcessing = true;
+
+ if( PaUtil_IsBufferProcessorOuputEmpty( &theAsioStream->bufferProcessor ) )
+ {
+ theAsioStream->zeroOutput = true;
+ theAsioStream->stopPlayoutCount = 0;
+ }
+ }
+ }
+ }
+
+ ++buffersDone;
+ }while( PaAsio_AtomicDecrement(&theAsioStream->reenterCount) >= 0 );
+
+ return 0L;
+}
+
+
+static void sampleRateChanged(ASIOSampleRate sRate)
+{
+ // TAKEN FROM THE ASIO SDK
+ // do whatever you need to do if the sample rate changed
+ // usually this only happens during external sync.
+ // Audio processing is not stopped by the driver, actual sample rate
+ // might not have even changed, maybe only the sample rate status of an
+ // AES/EBU or S/PDIF digital input at the audio device.
+ // You might have to update time/sample related conversion routines, etc.
+
+ (void) sRate; /* unused parameter */
+}
+
+static long asioMessages(long selector, long value, void* message, double* opt)
+{
+// TAKEN FROM THE ASIO SDK
+ // currently the parameters "value", "message" and "opt" are not used.
+ long ret = 0;
+
+ (void) message; /* unused parameters */
+ (void) opt;
+
+ switch(selector)
+ {
+ case kAsioSelectorSupported:
+ if(value == kAsioResetRequest
+ || value == kAsioEngineVersion
+ || value == kAsioResyncRequest
+ || value == kAsioLatenciesChanged
+ // the following three were added for ASIO 2.0, you don't necessarily have to support them
+ || value == kAsioSupportsTimeInfo
+ || value == kAsioSupportsTimeCode
+ || value == kAsioSupportsInputMonitor)
+ ret = 1L;
+ break;
+
+ case kAsioBufferSizeChange:
+ //printf("kAsioBufferSizeChange \n");
+ break;
+
+ case kAsioResetRequest:
+ // defer the task and perform the reset of the driver during the next "safe" situation
+ // You cannot reset the driver right now, as this code is called from the driver.
+ // Reset the driver is done by completely destruct is. I.e. ASIOStop(), ASIODisposeBuffers(), Destruction
+ // Afterwards you initialize the driver again.
+
+ /*FIXME: commented the next line out */
+ //asioDriverInfo.stopped; // In this sample the processing will just stop
+ ret = 1L;
+ break;
+
+ case kAsioResyncRequest:
+ // This informs the application, that the driver encountered some non fatal data loss.
+ // It is used for synchronization purposes of different media.
+ // Added mainly to work around the Win16Mutex problems in Windows 95/98 with the
+ // Windows Multimedia system, which could loose data because the Mutex was hold too long
+ // by another thread.
+ // However a driver can issue it in other situations, too.
+ ret = 1L;
+ break;
+
+ case kAsioLatenciesChanged:
+ // This will inform the host application that the drivers were latencies changed.
+ // Beware, it this does not mean that the buffer sizes have changed!
+ // You might need to update internal delay data.
+ ret = 1L;
+ //printf("kAsioLatenciesChanged \n");
+ break;
+
+ case kAsioEngineVersion:
+ // return the supported ASIO version of the host application
+ // If a host applications does not implement this selector, ASIO 1.0 is assumed
+ // by the driver
+ ret = 2L;
+ break;
+
+ case kAsioSupportsTimeInfo:
+ // informs the driver wether the asioCallbacks.bufferSwitchTimeInfo() callback
+ // is supported.
+ // For compatibility with ASIO 1.0 drivers the host application should always support
+ // the "old" bufferSwitch method, too.
+ ret = 1;
+ break;
+
+ case kAsioSupportsTimeCode:
+ // informs the driver wether application is interested in time code info.
+ // If an application does not need to know about time code, the driver has less work
+ // to do.
+ ret = 0;
+ break;
+ }
+ return ret;
+}
+
+
+static PaError StartStream( PaStream *s )
+{
+ PaError result = paNoError;
+ PaAsioStream *stream = (PaAsioStream*)s;
+ ASIOError asioError;
+
+ if( stream->outputChannelCount > 0 )
+ {
+ ZeroOutputBuffers( stream, 0 );
+ ZeroOutputBuffers( stream, 1 );
+ }
+
+ PaUtil_ResetBufferProcessor( &stream->bufferProcessor );
+ stream->stopProcessing = false;
+ stream->zeroOutput = false;
+
+ /* Reentrancy counter initialisation */
+ stream->reenterCount = -1;
+ stream->reenterError = 0;
+
+ stream->callbackFlags = 0;
+
+ if( ResetEvent( stream->completedBuffersPlayedEvent ) == 0 )
+ {
+ result = paUnanticipatedHostError;
+ PA_ASIO_SET_LAST_SYSTEM_ERROR( GetLastError() );
+ }
+
+ if( result == paNoError )
+ {
+ theAsioStream = stream;
+ asioError = ASIOStart();
+ if( asioError == ASE_OK )
+ {
+ stream->isActive = 1;
+ stream->streamFinishedCallbackCalled = false;
+ }
+ else
+ {
+ theAsioStream = 0;
+ result = paUnanticipatedHostError;
+ PA_ASIO_SET_LAST_ASIO_ERROR( asioError );
+ }
+ }
+
+ return result;
+}
+
+
+static PaError StopStream( PaStream *s )
+{
+ PaError result = paNoError;
+ PaAsioStream *stream = (PaAsioStream*)s;
+ ASIOError asioError;
+
+ if( stream->isActive )
+ {
+ stream->stopProcessing = true;
+
+ /* wait for the stream to finish playing out enqueued buffers.
+ timeout after four times the stream latency.
+
+ @todo should use a better time out value - if the user buffer
+ length is longer than the asio buffer size then that should
+ be taken into account.
+ */
+ if( WaitForSingleObject( theAsioStream->completedBuffersPlayedEvent,
+ (DWORD)(stream->streamRepresentation.streamInfo.outputLatency * 1000. * 4.) )
+ == WAIT_TIMEOUT )
+ {
+ PA_DEBUG(("WaitForSingleObject() timed out in StopStream()\n" ));
+ }
+ }
+
+ asioError = ASIOStop();
+ if( asioError != ASE_OK )
+ {
+ result = paUnanticipatedHostError;
+ PA_ASIO_SET_LAST_ASIO_ERROR( asioError );
+ }
+
+ theAsioStream = 0;
+ stream->isActive = 0;
+
+ if( !stream->streamFinishedCallbackCalled )
+ {
+ if( stream->streamRepresentation.streamFinishedCallback != 0 )
+ stream->streamRepresentation.streamFinishedCallback( stream->streamRepresentation.userData );
+ }
+
+ return result;
+}
+
+
+static PaError AbortStream( PaStream *s )
+{
+ PaError result = paNoError;
+ PaAsioStream *stream = (PaAsioStream*)s;
+ ASIOError asioError;
+
+ stream->zeroOutput = true;
+
+ asioError = ASIOStop();
+ if( asioError != ASE_OK )
+ {
+ result = paUnanticipatedHostError;
+ PA_ASIO_SET_LAST_ASIO_ERROR( asioError );
+ }
+ else
+ {
+ // make sure that the callback is not still in-flight when ASIOStop()
+ // returns. This has been observed to happen on the Hoontech DSP24 for
+ // example.
+ int count = 2000; // only wait for 2 seconds, rather than hanging.
+ while( theAsioStream->reenterCount != -1 && count > 0 )
+ {
+ Sleep(1);
+ --count;
+ }
+ }
+
+ /* it is questionable whether we should zero theAsioStream if ASIOStop()
+ returns an error, because the callback could still be active. We assume
+ not - this is based on the fact that ASIOStop is unlikely to fail
+ if the callback is running - it's more likely to fail because the
+ callback is not running. */
+
+ theAsioStream = 0;
+ stream->isActive = 0;
+
+ if( !stream->streamFinishedCallbackCalled )
+ {
+ if( stream->streamRepresentation.streamFinishedCallback != 0 )
+ stream->streamRepresentation.streamFinishedCallback( stream->streamRepresentation.userData );
+ }
+
+ return result;
+}
+
+
+static PaError IsStreamStopped( PaStream *s )
+{
+ //PaAsioStream *stream = (PaAsioStream*)s;
+ (void) s; /* unused parameter */
+ return theAsioStream == 0;
+}
+
+
+static PaError IsStreamActive( PaStream *s )
+{
+ PaAsioStream *stream = (PaAsioStream*)s;
+
+ return stream->isActive;
+}
+
+
+static PaTime GetStreamTime( PaStream *s )
+{
+ (void) s; /* unused parameter */
+ return (double)timeGetTime() * .001;
+}
+
+
+static double GetStreamCpuLoad( PaStream* s )
+{
+ PaAsioStream *stream = (PaAsioStream*)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 )
+{
+ PaAsioStream *stream = (PaAsioStream*)s;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+ (void) stream; /* unused parameters */
+ (void) buffer;
+ (void) frames;
+
+ return paNoError;
+}
+
+
+static PaError WriteStream( PaStream* s,
+ const void *buffer,
+ unsigned long frames )
+{
+ PaAsioStream *stream = (PaAsioStream*)s;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+ (void) stream; /* unused parameters */
+ (void) buffer;
+ (void) frames;
+
+ return paNoError;
+}
+
+
+static signed long GetStreamReadAvailable( PaStream* s )
+{
+ PaAsioStream *stream = (PaAsioStream*)s;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+ (void) stream; /* unused parameter */
+
+ return 0;
+}
+
+
+static signed long GetStreamWriteAvailable( PaStream* s )
+{
+ PaAsioStream *stream = (PaAsioStream*)s;
+
+ /* IMPLEMENT ME, see portaudio.h for required behavior*/
+ (void) stream; /* unused parameter */
+
+ return 0;
+}
+
+
+PaError PaAsio_ShowControlPanel( PaDeviceIndex device, void* systemSpecific )
+{
+ PaError result = paNoError;
+ PaUtilHostApiRepresentation *hostApi;
+ PaDeviceIndex hostApiDevice;
+ ASIODriverInfo asioDriverInfo;
+ ASIOError asioError;
+ int asioIsInitialized = 0;
+ PaAsioHostApiRepresentation *asioHostApi;
+ PaAsioDeviceInfo *asioDeviceInfo;
+
+
+ result = PaUtil_GetHostApiRepresentation( &hostApi, paASIO );
+ if( result != paNoError )
+ goto error;
+
+ result = PaUtil_DeviceIndexToHostApiDeviceIndex( &hostApiDevice, device, hostApi );
+ if( result != paNoError )
+ goto error;
+
+ /*
+ In theory we could proceed if the currently open device was the same
+ one for which the control panel was requested, however because the
+ window pointer is not available until this function is called we
+ currently need to call ASIOInit() again here, which of course can't be
+ done safely while a stream is open.
+ */
+
+ asioHostApi = (PaAsioHostApiRepresentation*)hostApi;
+ if( asioHostApi->openAsioDeviceIndex != paNoDevice )
+ {
+ result = paDeviceUnavailable;
+ goto error;
+ }
+
+ asioDeviceInfo = (PaAsioDeviceInfo*)hostApi->deviceInfos[hostApiDevice];
+
+ if( !loadAsioDriver( const_cast<char*>(asioDeviceInfo->commonDeviceInfo.name) ) )
+ {
+ result = paUnanticipatedHostError;
+ goto error;
+ }
+
+ /* CRUCIAL!!! */
+ memset( &asioDriverInfo, 0, sizeof(ASIODriverInfo) );
+ asioDriverInfo.asioVersion = 2;
+ asioDriverInfo.sysRef = systemSpecific;
+ asioError = ASIOInit( &asioDriverInfo );
+ if( asioError != ASE_OK )
+ {
+ result = paUnanticipatedHostError;
+ PA_ASIO_SET_LAST_ASIO_ERROR( asioError );
+ goto error;
+ }
+ else
+ {
+ asioIsInitialized = 1;
+ }
+
+PA_DEBUG(("PaAsio_ShowControlPanel: ASIOInit(): %s\n", PaAsio_GetAsioErrorText(asioError) ));
+PA_DEBUG(("asioVersion: ASIOInit(): %ld\n", asioDriverInfo.asioVersion ));
+PA_DEBUG(("driverVersion: ASIOInit(): %ld\n", asioDriverInfo.driverVersion ));
+PA_DEBUG(("Name: ASIOInit(): %s\n", asioDriverInfo.name ));
+PA_DEBUG(("ErrorMessage: ASIOInit(): %s\n", asioDriverInfo.errorMessage ));
+
+ asioError = ASIOControlPanel();
+ if( asioError != ASE_OK )
+ {
+ PA_DEBUG(("PaAsio_ShowControlPanel: ASIOControlPanel(): %s\n", PaAsio_GetAsioErrorText(asioError) ));
+ result = paUnanticipatedHostError;
+ PA_ASIO_SET_LAST_ASIO_ERROR( asioError );
+ goto error;
+ }
+
+PA_DEBUG(("PaAsio_ShowControlPanel: ASIOControlPanel(): %s\n", PaAsio_GetAsioErrorText(asioError) ));
+
+ asioError = ASIOExit();
+ if( asioError != ASE_OK )
+ {
+ result = paUnanticipatedHostError;
+ PA_ASIO_SET_LAST_ASIO_ERROR( asioError );
+ asioIsInitialized = 0;
+ goto error;
+ }
+
+PA_DEBUG(("PaAsio_ShowControlPanel: ASIOExit(): %s\n", PaAsio_GetAsioErrorText(asioError) ));
+
+ return result;
+
+error:
+ if( asioIsInitialized )
+ ASIOExit();
+
+ return result;
+}
+
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-05 01:05:38 +0000