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Unit unaASIOAPI

Description

Uses

Classes, Interfaces, Objects and Records

Functions and Procedures

Types

Constants

Variables

Description

ASIO API

version 1.0: first version

version 1.1: added x64 support

Uses

Overview

Classes, Interfaces, Objects and Records

Name	Description
packed record `ASIOBufferInfo`
packed record `ASIOCallbacks`
packed record `ASIOChannelControls`
packed record `ASIOChannelInfo`
packed record `ASIOClockSource`
packed record `ASIODriverInfo`
packed record `ASIODRVSTRUCT`
packed record `ASIOInputMonitor`
packed record `ASIOIoFormat_s`
packed record `ASIOTime`
packed record `ASIOTimeCode`
packed record `AsioTimeInfo`
packed record `ASIOTransportParameters`
Interface `IASIO`	ASIO COM Interface
Class `unaAsioBufferProcessor`	– unaAsioBufferProcessor –
Class `unaAsioDriver`	– unaAsioDriver –
Class `unaAsioDriverList`	– unaAsioDriverList –

Functions and Procedures

function timeGetTime(): DWORD; stdcall;

function asioChannelType2str(_type: int): string;

function CLSIDFromString(psz: pwChar; out clsid: TGUID): HResult; stdcall; external 'ole32.dll' name 'CLSIDFromString';

function CoInitialize(res: pointer): HResult; stdcall; external 'ole32.dll' name 'CoInitialize';

function CoInitializeEx(pvReserved: Pointer; coInit: Longint): HResult; stdcall; external 'ole32.dll' name 'CoInitializeEx';

procedure CoUninitialize(); stdcall; external 'ole32.dll' name 'CoUninitialize';

function CoCreateInstance(const clsid: CLSID; unkOuter: IUnknown; dwClsContext: Longint; const iid: TIID; out pv): HResult; stdcall; external 'ole32.dll' name 'CoCreateInstance';

Types

long = int32;

ASIOSamples = int64;

ASIOTimeStamp = int64;

pASIOSampleRate = ˆASIOSampleRate;

ASIOSampleRate = double;

ASIOBool = long;

ASIOSampleType = long;

ASIOError = long;

ASIOTimeCodeFlags = long;

pASIOTimeCode = ˆASIOTimeCode;

AsioTimeInfoFlags = long;

pAsioTimeInfo = ˆAsioTimeInfo;

pASIOTime = ˆASIOTime;

pASIOClockSource = ˆASIOClockSource;

pASIOClockSources = ˆASIOClockSources;

ASIOClockSources = array[byte] of ASIOClockSource;

proc_bufferSwitch = procedure(index: long; processNow: ASIOBool); cdecl;

proc_sampleRateChanged = procedure(sRate: ASIOSampleRate); cdecl;

proc_asioMessage = function(selector: long; value: long; message: pointer; opt: pDouble): long; cdecl;

proc_bufferSwitchTimeInfo = function(timeInfo: pASIOTime; index: long; processNow: ASIOBool): pASIOTime; cdecl;

pASIOCallbacks = ˆASIOCallbacks;

pASIODriverInfo = ˆASIODriverInfo;

pASIOChannelInfo = ˆASIOChannelInfo;

pASIOBufferInfo = ˆASIOBufferInfo;

pASIOInputMonitor = ˆASIOInputMonitor;

pASIOChannelControls = ˆASIOChannelControls;

pASIOTransportParameters = ˆASIOTransportParameters;

ASIOIoFormatType = long;

pASIOIoFormat_s = ˆASIOIoFormat_s;

ASIOIoFormat = ASIOIoFormat_s;

bufferSwitchEvent = procedure(sender: tObject; index: long; processNow: bool) of object;

sampleRateChangedEvent = procedure(sender: tObject; rate: ASIOSampleRate) of object;

asioMessageEvent = procedure(sender: tObject; selector: long; value: long; message: pointer; opt: pDouble; out result: long) of object;

bufferSwitchTimeInfoEvent = procedure(sender: tObject; timeInfo: pASIOTime; index: long; processNow: bool; time: pASIOTime) of object;

unaASIOSampleOp = (...);

unaASIODriverState = (...);

CLSID = TGUID;

TIID = TGUID;

pASIODRVSTRUCT = ˆASIODRVSTRUCT;

Constants

ASE_HWMalfunction = ASE_NotPresent + 1;

ASE_InvalidMode = ASE_NotPresent + 3;

ASE_InvalidParameter = ASE_NotPresent + 2;

ASE_NoClock = ASE_NotPresent + 5;

ASE_NoMemory = ASE_NotPresent + 6;

ASE_NotPresent = -1000;

ASE_OK = 0;

ASE_SPNotAdvancing = ASE_NotPresent + 4;

ASE_SUCCESS = $3f4847a0;

ASIOFalse = 0;

ASIOSTDSDInt8LSB1 = 32;

ASIOSTDSDInt8MSB1 = 33;

ASIOSTDSDInt8NER8 = 40;

ASIOSTFloat32LSB = 19;

ASIOSTFloat32MSB = 3;

ASIOSTFloat64LSB = 20;

ASIOSTFloat64MSB = 4;

ASIOSTInt16LSB = 16;

ASIOSTInt16MSB = 0;

ASIOSTInt24LSB = 17;

ASIOSTInt24MSB = 1;

ASIOSTInt32LSB = 18;

ASIOSTInt32LSB16 = 24;

ASIOSTInt32LSB18 = 25;

ASIOSTInt32LSB20 = 26;

ASIOSTInt32LSB24 = 27;

ASIOSTInt32MSB = 2;

ASIOSTInt32MSB16 = 8;

ASIOSTInt32MSB18 = 9;

ASIOSTInt32MSB20 = 10;

ASIOSTInt32MSB24 = 11;

ASIOSTLastEntry = ASIOSTDSDInt8NER8 + 1;

ASIOTrue = 1;

CLSCTX_INPROC_HANDLER = 2;

CLSCTX_INPROC_HANDLER16 = $20;

CLSCTX_INPROC_HANDLERX86 = $80;

CLSCTX_INPROC_SERVER = 1;

CLSCTX_INPROC_SERVER16 = 8;

CLSCTX_INPROC_SERVERX86 = $40;

CLSCTX_LOCAL_SERVER = 4;

CLSCTX_REMOTE_SERVER = $10;

cofs_canSampleRate = cofs_init + 4 * 9;

cofs_controlPanel = cofs_init + 4 * 18;

cofs_createBuffers = cofs_init + 4 * 16;

cofs_disposeBuffers = cofs_init + 4 * 17;

cofs_future = cofs_init + 4 * 19;

cofs_getBufferSize = cofs_init + 4 * 8;

cofs_getChannelInfo = cofs_init + 4 * 15;

cofs_getChannels = cofs_init + 4 * 6;

cofs_getClockSources = cofs_init + 4 * 12;

cofs_getDriverName = cofs_init + 4 * 1;

cofs_getDriverVersion = cofs_init + 4 * 2;

cofs_getErrorMessage = cofs_init + 4 * 3;

cofs_getLatencies = cofs_init + 4 * 7;

cofs_getSamplePosition = cofs_init + 4 * 14;

cofs_getSampleRate = cofs_init + 4 * 10;

cofs_init = 12;

cofs_outputReady = cofs_init + 4 * 20;

cofs_setClockSource = cofs_init + 4 * 13;

cofs_setSampleRate = cofs_init + 4 * 11;

cofs_start = cofs_init + 4 * 4;

cofs_stop = cofs_init + 4 * 5;

COINIT_APARTMENTTHREADED = 2;

COINIT_DISABLE_OLE1DDE = 4;

COINIT_MULTITHREADED = 0;

COINIT_SPEED_OVER_MEMORY = 8;

DRVERR = -5000;

DRVERR_DEVICE_ALREADY_OPEN = DRVERR - 2;

DRVERR_DEVICE_NOT_FOUND = DRVERR - 3;

DRVERR_INVALID_PARAM = DRVERR - 1;

kAsioBufferSizeChange = 4;

kAsioCanDoIoFormat = $23112004;

kAsioCanInputGain = 13;

kAsioCanInputMeter = 14;

kAsioCanInputMonitor = 9;

kAsioCanOutputGain = 15;

kAsioCanOutputMeter = 16;

kAsioCanTimeCode = 11;

kAsioCanTimeInfo = 10;

kAsioCanTransport = 12;

kAsioDisableTimeCodeRead = 2;

kASIODSDFormat = 1;

kAsioEnableTimeCodeRead = 1;

kAsioEngineVersion = 2;

kASIOFormatInvalid = -1;

kAsioGetInputMeter = 6;

kAsioGetIoFormat = $23111983;

kAsioGetOutputMeter = 8;

kAsioLatenciesChanged = 6;

kAsioMMCCommand = 9;

kAsioNumMessageSelectors = 16;

kAsioOverload = 15;

kASIOPCMFormat = 0;

kAsioResetRequest = 3;

kAsioResyncRequest = 5;

kAsioSelectorSupported = 1;

kAsioSetInputGain = 5;

kAsioSetInputMonitor = 3;

kAsioSetIoFormat = $23111961;

kAsioSetOutputGain = 7;

kAsioSupportsInputGain = 11;

kAsioSupportsInputMeter = 12;

kAsioSupportsInputMonitor = 10;

kAsioSupportsOutputGain = 13;

kAsioSupportsOutputMeter = 14;

kAsioSupportsTimeCode = 8;

kAsioSupportsTimeInfo = 7;

kAsioTransport = 4;

kClockSourceChanged = 1 shl 5;

kMaxInputChannels = 256;

kMaxOutputChannels = 256;

kSamplePositionValid = 1 shl 1;

kSampleRateChanged = 1 shl 4;

kSampleRateValid = 1 shl 2;

kSpeedValid = 1 shl 3;

kSystemTimeValid = 1;

kTcOnspeed = 1 shl 3;

kTcReverse = 1 shl 2;

kTcRunning = 1 shl 1;

kTcSpeedValid = 1 shl 8;

kTcStill = 1 shl 4;

kTcValid = 1;

kTransArm = 10;

kTransArmOff = 7;

kTransArmOn = 6;

kTransLocate = 3;

kTransMonitor = 11;

kTransMonitorOff = 9;

kTransMonitorOn = 8;

kTransPunchIn = 4;

kTransPunchOut = 5;

kTransStart = 1;

kTransStop = 2;

MAXDRVNAMELEN = 128;

MAXPATHLEN = 512;

Description

Functions and Procedures

function timeGetTime(): DWORD; stdcall;

function asioChannelType2str(_type: int): string;

– –

function CLSIDFromString(psz: pwChar; out clsid: TGUID): HResult; stdcall; external 'ole32.dll' name 'CLSIDFromString';

– externals –

function CoInitialize(res: pointer): HResult; stdcall; external 'ole32.dll' name 'CoInitialize';

function CoInitializeEx(pvReserved: Pointer; coInit: Longint): HResult; stdcall; external 'ole32.dll' name 'CoInitializeEx';

procedure CoUninitialize(); stdcall; external 'ole32.dll' name 'CoUninitialize';

function CoCreateInstance(const clsid: CLSID; unkOuter: IUnknown; dwClsContext: Longint; const iid: TIID; out pv): HResult; stdcall; external 'ole32.dll' name 'CoCreateInstance';

Types

long = int32;

force 4 byte alignment - - - - - - - - - - - - - - - - - - - - - - - - - Type definitions - - - - - - - - - - - - - - - - - - - - - - - - -

ASIOSamples = int64;

number of samples data type is 64 bit integer

ASIOTimeStamp = int64;

Timestamp data type is 64 bit integer, Time format is Nanoseconds.

pASIOSampleRate = ˆASIOSampleRate;

Samplerates are expressed in IEEE 754 64 bit double float, native format as host computer

ASIOSampleRate = double;

ASIOBool = long;

Boolean values are expressed as long

ASIOSampleType = long;

Sample Types are expressed as long

ASIOError = long;

—————————————————————————– - - - - - - - - - - - - - - - - - - - - - - - - - Error codes - - - - - - - - - - - - - - - - - - - - - - - - -

ASIOTimeCodeFlags = long;

not enough memory for completing the request ————————————————————————————————— - - - - - - - - - - - - - - - - - - - - - - - - - Time Info support - - - - - - - - - - - - - - - - - - - - - - - - - – –

pASIOTimeCode = ˆASIOTimeCode;

– –

AsioTimeInfoFlags = long;

– –

pAsioTimeInfo = ˆAsioTimeInfo;

– –

pASIOTime = ˆASIOTime;

– –

pASIOClockSource = ˆASIOClockSource;

optional, evaluated if (timeCode.flags & kTcValid) – –

pASIOClockSources = ˆASIOClockSources;

for user selection

ASIOClockSources = array[byte] of ASIOClockSource;

proc_bufferSwitch = procedure(index: long; processNow: ASIOBool); cdecl;

- - - - - - - - - - - - - - - - - - - - - - - - - application's audio stream handler callbacks - - - - - - - - - - - - - - - - - - - - - - - - -

proc_sampleRateChanged = procedure(sRate: ASIOSampleRate); cdecl;

proc_asioMessage = function(selector: long; value: long; message: pointer; opt: pDouble): long; cdecl;

proc_bufferSwitchTimeInfo = function(timeInfo: pASIOTime; index: long; processNow: ASIOBool): pASIOTime; cdecl;

pASIOCallbacks = ˆASIOCallbacks;

pASIODriverInfo = ˆASIODriverInfo;

? ————————————————————————————————— - - - - - - - - - - - - - - - - - - - - - - - - - (De-)Construction - - - - - - - - - - - - - - - - - - - - - - - - -

pASIOChannelInfo = ˆASIOChannelInfo;

on input: system reference (Windows: application main window handle, Mac & SGI: 0)

pASIOBufferInfo = ˆASIOBufferInfo;

dto - - - - - - - - - - - - - - - - - - - - - - - - - Buffer preparation - - - - - - - - - - - - - - - - - - - - - - - - -

pASIOInputMonitor = ˆASIOInputMonitor;

ASIOIoFormat * in params. */ – –

pASIOChannelControls = ˆASIOChannelControls;

suggested pan, 0 => all left, 0x7fffffff => right – –

pASIOTransportParameters = ˆASIOTransportParameters;

– –

ASIOIoFormatType = long;

trackSwitches

pASIOIoFormat_s = ˆASIOIoFormat_s;

ASIOIoFormat = ASIOIoFormat_s;

bufferSwitchEvent = procedure(sender: tObject; index: long; processNow: bool) of object;

callback events prototypes

sampleRateChangedEvent = procedure(sender: tObject; rate: ASIOSampleRate) of object;

asioMessageEvent = procedure(sender: tObject; selector: long; value: long; message: pointer; opt: pDouble; out result: long) of object;

bufferSwitchTimeInfoEvent = procedure(sender: tObject; timeInfo: pASIOTime; index: long; processNow: bool; time: pASIOTime) of object;

unaASIOSampleOp = (...);

Values

soAdd:
soSub:
soReplace:

unaASIODriverState = (...);

Values

dsLoaded:
dsInitialized:
dsPrepared:
dsRunning:

CLSID = TGUID;

TIID = TGUID;

pASIODRVSTRUCT = ˆASIODRVSTRUCT;

Constants

ASE_HWMalfunction = ASE_NotPresent + 1;

hardware input or output is not present or available

ASE_InvalidMode = ASE_NotPresent + 3;

input parameter invalid

ASE_InvalidParameter = ASE_NotPresent + 2;

hardware is malfunctioning (can be returned by any ASIO function)

ASE_NoClock = ASE_NotPresent + 5;

hardware is not running when sample position is inquired

ASE_NoMemory = ASE_NotPresent + 6;

sample clock or rate cannot be determined or is not present

ASE_NotPresent = -1000;

unique success return value for ASIOFuture calls

ASE_OK = 0;

ASE_SPNotAdvancing = ASE_NotPresent + 4;

hardware is in a bad mode or used in a bad mode

ASE_SUCCESS = $3f4847a0;

This value will be returned whenever the call succeeded

ASIOFalse = 0;

ASIOSTDSDInt8LSB1 = 32;

32 bit data with 24 bit alignment ASIO DSD format.

ASIOSTDSDInt8MSB1 = 33;

DSD 1 bit data, 8 samples per byte. First sample in Least significant bit.

ASIOSTDSDInt8NER8 = 40;

DSD 1 bit data, 8 samples per byte. First sample in Most significant bit.

ASIOSTFloat32LSB = 19;

ASIOSTFloat32MSB = 3;

ASIOSTFloat64LSB = 20;

IEEE 754 32 bit float, as found on Intel x86 architecture

ASIOSTFloat64MSB = 4;

IEEE 754 32 bit float

ASIOSTInt16LSB = 16;

32 bit data with 24 bit alignment

ASIOSTInt16MSB = 0;

ASIOSTInt24LSB = 17;

ASIOSTInt24MSB = 1;

ASIOSTInt32LSB = 18;

used for 20 bits as well

ASIOSTInt32LSB16 = 24;

IEEE 754 64 bit double float, as found on Intel x86 architecture these are used for 32 bit data buffer, with different alignment of the data inside 32 bit PCI bus systems can more easily used with these

ASIOSTInt32LSB18 = 25;

32 bit data with 18 bit alignment

ASIOSTInt32LSB20 = 26;

32 bit data with 18 bit alignment

ASIOSTInt32LSB24 = 27;

32 bit data with 20 bit alignment

ASIOSTInt32MSB = 2;

used for 20 bits as well

ASIOSTInt32MSB16 = 8;

IEEE 754 64 bit double float these are used for 32 bit data buffer, with different alignment of the data inside 32 bit PCI bus systems can be more easily used with these

ASIOSTInt32MSB18 = 9;

32 bit data with 18 bit alignment

ASIOSTInt32MSB20 = 10;

32 bit data with 18 bit alignment

ASIOSTInt32MSB24 = 11;

32 bit data with 20 bit alignment

ASIOSTLastEntry = ASIOSTDSDInt8NER8 + 1;

DSD 8 bit data, 1 sample per byte. No Endianness required.

ASIOTrue = 1;

CLSCTX_INPROC_HANDLER = 2;

CLSCTX_INPROC_HANDLER16 = $20;

CLSCTX_INPROC_HANDLERX86 = $80;

CLSCTX_INPROC_SERVER = 1;

Trade memory for speed.

CLSCTX_INPROC_SERVER16 = 8;

CLSCTX_INPROC_SERVERX86 = $40;

CLSCTX_LOCAL_SERVER = 4;

CLSCTX_REMOTE_SERVER = $10;

cofs_canSampleRate = cofs_init + 4 * 9;

cofs_controlPanel = cofs_init + 4 * 18;

cofs_createBuffers = cofs_init + 4 * 16;

cofs_disposeBuffers = cofs_init + 4 * 17;

cofs_future = cofs_init + 4 * 19;

cofs_getBufferSize = cofs_init + 4 * 8;

cofs_getChannelInfo = cofs_init + 4 * 15;

cofs_getChannels = cofs_init + 4 * 6;

cofs_getClockSources = cofs_init + 4 * 12;

cofs_getDriverName = cofs_init + 4 * 1;

cofs_getDriverVersion = cofs_init + 4 * 2;

cofs_getErrorMessage = cofs_init + 4 * 3;

cofs_getLatencies = cofs_init + 4 * 7;

cofs_getSamplePosition = cofs_init + 4 * 14;

cofs_getSampleRate = cofs_init + 4 * 10;

cofs_init = 12;

—— iasiodrv.h —–

cofs_outputReady = cofs_init + 4 * 20;

cofs_setClockSource = cofs_init + 4 * 13;

cofs_setSampleRate = cofs_init + 4 * 11;

cofs_start = cofs_init + 4 * 4;

cofs_stop = cofs_init + 4 * 5;

COINIT_APARTMENTTHREADED = 2;

OLE calls objects on any thread.

COINIT_DISABLE_OLE1DDE = 4;

Apartment model

COINIT_MULTITHREADED = 0;

flags passed as the coInit parameter to CoInitializeEx.

COINIT_SPEED_OVER_MEMORY = 8;

Dont use DDE for Ole1 support.

DRVERR = -5000;

———– asiolist.h ————-

DRVERR_DEVICE_ALREADY_OPEN = DRVERR - 2;

DRVERR_DEVICE_NOT_FOUND = DRVERR - 3;

DRVERR_INVALID_PARAM = DRVERR - 1;

kAsioBufferSizeChange = 4;

request driver reset. if accepted, this will close the driver (ASIO_Exit() ) and re-open it again (ASIO_Init() etc). some drivers need to reconfigure for instance when the sample rate changes, or some basic changes have been made in ASIO_ControlPanel(). returns 1L; note the request is merely passed to the application, there is no way to determine if it gets accepted at this time (but it usually will be).

kAsioCanDoIoFormat = $23112004;

ASIOIoFormat * in params. */

kAsioCanInputGain = 13;

kAsioCanInputMeter = 14;

kAsioCanInputMonitor = 9;

ASIOChannelControls* in params, fill meter

kAsioCanOutputGain = 15;

kAsioCanOutputMeter = 16;

kAsioCanTimeCode = 11;

kAsioCanTimeInfo = 10;

no arguments for kAsioCanXXX selectors

kAsioCanTransport = 12;

kAsioDisableTimeCodeRead = 2;

no arguments

kASIODSDFormat = 1;

kAsioEnableTimeCodeRead = 1;

on output: double buffer addresses future selectors

kAsioEngineVersion = 2;

selector in <value>, returns 1L if supported, 0 otherwise

kASIOFormatInvalid = -1;

enum ASIOIoFormatType_e

kAsioGetInputMeter = 6;

ASIOChannelControls* in params, apply gain

kAsioGetIoFormat = $23111983;

ASIOIoFormat * in params. */

kAsioGetOutputMeter = 8;

ASIOChannelControls* in params, apply gain

kAsioLatenciesChanged = 6;

the driver went out of sync, such that the timestamp is no longer valid. this is a request to re-start the engine and slave devices (sequencer). returns 1 for ok, 0 if not supported.

kAsioMMCCommand = 9;

kAsioNumMessageSelectors = 16;

driver detected an overload

kAsioOverload = 15;

unused and undefined

kASIOPCMFormat = 0;

kAsioResetRequest = 3;

returns engine (host) asio implementation version, 2 or higher

kAsioResyncRequest = 5;

not yet supported, will currently always return 0L. for now, use kAsioResetRequest instead. once implemented, the new buffer size is expected in <value>, and on success returns 1L

kAsioSelectorSupported = 1;

asioMessage selectors

kAsioSetInputGain = 5;

ASIOTransportParameters* in params

kAsioSetInputMonitor = 3;

no arguments

kAsioSetIoFormat = $23111961;

DSD support The following extensions are required to allow switching and control of the DSD subsystem.

kAsioSetOutputGain = 7;

ASIOChannelControls* in params, fill meter

kAsioSupportsInputGain = 11;

kAsioSupportsXXX return 1 if host supports this

kAsioSupportsInputMeter = 12;

unused and undefined

kAsioSupportsInputMonitor = 10;

unused - value: number of commands, message points to mmc commands

kAsioSupportsOutputGain = 13;

unused and undefined

kAsioSupportsOutputMeter = 14;

unused and undefined

kAsioSupportsTimeCode = 8;

if host returns true here, it will expect the callback bufferSwitchTimeInfo to be called instead of bufferSwitch

kAsioSupportsTimeInfo = 7;

the drivers latencies have changed. The engine will refetch the latencies.

kAsioTransport = 4;

ASIOInputMonitor* in params

kClockSourceChanged = 1 shl 5;

kMaxInputChannels = 256;

number of input and outputs supported by the host application you can change these to higher or lower values

kMaxOutputChannels = 256;

kSamplePositionValid = 1 shl 1;

must always be valid

kSampleRateChanged = 1 shl 4;

kSampleRateValid = 1 shl 2;

must always be valid

kSpeedValid = 1 shl 3;

kSystemTimeValid = 1;

kTcOnspeed = 1 shl 3;

kTcReverse = 1 shl 2;

kTcRunning = 1 shl 1;

kTcSpeedValid = 1 shl 8;

kTcStill = 1 shl 4;

kTcValid = 1;

kTransArm = 10;

track

kTransArmOff = 7;

track

kTransArmOn = 6;

kTransLocate = 3;

kTransMonitor = 11;

trackSwitches

kTransMonitorOff = 9;

track

kTransMonitorOn = 8;

track

kTransPunchIn = 4;

to samplePosition

kTransPunchOut = 5;

kTransStart = 1;

kTransStop = 2;

MAXDRVNAMELEN = 128;

MAXPATHLEN = 512;

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