Unit I2S
From Ultibo.org
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Description
Ultibo I2S/PCM Interface unit
Constants
I2S specific constants
I2S_* I2S_NAME_PREFIX = 'I2S';
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Name prefix for I2S Devices |
I2S device types
I2S_TYPE_* I2S_TYPE_NONE = 0;
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I2S device states
I2S_STATE_* I2S_STATE_DISABLED = 0;
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I2S_STATE_ENABLED = 1;
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I2S device flags
I2S_FLAG_* I2S_FLAG_NONE = $00000000;
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I2S logging
I2S_LOG_* I2S_LOG_LEVEL_DEBUG = LOG_LEVEL_DEBUG;
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I2S debugging messages |
I2S_LOG_LEVEL_INFO = LOG_LEVEL_INFO;
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I2S informational messages, such as a device being attached or detached |
I2S_LOG_LEVEL_WARN = LOG_LEVEL_WARN;
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I2S warning messages |
I2S_LOG_LEVEL_ERROR = LOG_LEVEL_ERROR;
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I2S error messages |
I2S_LOG_LEVEL_NONE = LOG_LEVEL_NONE;
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No I2S messages |
Type definitions
I2S properties
PI2SProperties = ^TI2SProperties;
TI2SProperties = record
I2S enumeration callback
TI2SEnumerate = function(I2S:PI2SDevice; Data:Pointer):LongWord;
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I2S notification callback
TI2SNotification = function(Device:PDevice; Data:Pointer; Notification:LongWord):LongWord;
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I2S device get properties
TI2SDeviceGetProperties = function(I2S:PI2SDevice; Properties:PI2SProperties):LongWord;
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I2S device
PI2SDevice = ^TI2SDevice;
TI2SDevice = record
| Device Properties | |
Device:TDevice;
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The Device entry for this I2S |
| I2S Properties | |
I2SId:LongWord;
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Unique Id of this I2S in the I2S table |
I2SState:LongWord;
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I2S state (eg I2S_STATE_ENABLED) |
DeviceGetProperties:TI2SDeviceGetProperties;
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A Device specific DeviceGetProperties method implementing the standard I2S device interface |
| Statistics Properties | |
| Driver Properties | |
Lock:TMutexHandle;
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Device lock |
Properties:TI2SProperties;
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Device properties |
| Internal Properties | |
Prev:PI2SDevice;
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Previous entry in I2S table |
Next:PI2SDevice;
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Next entry in I2S table |
Public variables
I2S logging
I2S_DEFAULT_LOG_LEVEL:LongWord = I2S_LOG_LEVEL_DEBUG;
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Minimum level for I2S messages. Only messages with level greater than or equal to this will be printed. |
I2S_LOG_ENABLED:Boolean;
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Function declarations
Initialization functions
procedure I2SInit;
Description: To be documented
| Note | None documented |
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I2S functions
function I2SDeviceGetProperties(I2S:PI2SDevice; Properties:PI2SProperties):LongWord;
Description: To be documented
| Note | None documented |
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function I2SDeviceCreate:PI2SDevice;
Description: Create a new I2S entry
| Return | Pointer to new I2S entry or nil if I2S could not be created |
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function I2SDeviceCreateEx(Size:LongWord):PI2SDevice;
Description: Create a new I2S entry
| Size | Size in bytes to allocate for new I2S (Including the I2S entry) |
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| Return | Pointer to new I2S entry or nil if I2S could not be created |
function I2SDeviceDestroy(I2S:PI2SDevice):LongWord;
Description: Destroy an existing I2S entry
| Note | None documented |
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function I2SDeviceRegister(I2S:PI2SDevice):LongWord;
Description: Register a new I2S in the I2S table
| Note | None documented |
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function I2SDeviceDeregister(I2S:PI2SDevice):LongWord;
Description: Deregister a I2S from the I2S table
| Note | None documented |
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function I2SDeviceFind(I2SId:LongWord):PI2SDevice;
Description: To be documented
| Note | None documented |
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function I2SDeviceFindByName(const Name:String):PI2SDevice; inline;
Description: To be documented
| Note | None documented |
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function I2SDeviceFindByDescription(const Description:String):PI2SDevice; inline;
Description: To be documented
| Note | None documented |
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function I2SDeviceEnumerate(Callback:TI2SEnumerate; Data:Pointer):LongWord;
Description: To be documented
| Note | None documented |
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function I2SDeviceNotification(I2S:PI2SDevice; Callback:TI2SNotification; Data:Pointer; Notification,Flags:LongWord):LongWord;
Description: To be documented
| Note | None documented |
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I2S helper functions
function I2SGetCount:LongWord; inline;
Description: Get the current I2S count
| Note | None documented |
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function I2SDeviceGetDefault:PI2SDevice; inline;
Description: Get the current default I2S device
| Note | None documented |
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function I2SDeviceSetDefault(I2S:PI2SDevice):LongWord;
Description: Set the current default I2S device
| Note | None documented |
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function I2SDeviceCheck(I2S:PI2SDevice):PI2SDevice;
Description: Check if the supplied I2S is in the I2S table
| Note | None documented |
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procedure I2SLog(Level:LongWord; I2S:PI2SDevice; const AText:String);
Description: To be documented
| Note | None documented |
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procedure I2SLogInfo(I2S:PI2SDevice; const AText:String); inline;
Description: To be documented
| Note | None documented |
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procedure I2SLogWarn(I2S:PI2SDevice; const AText:String); inline;
Description: To be documented
| Note | None documented |
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procedure I2SLogError(I2S:PI2SDevice; const AText:String); inline;
Description: To be documented
| Note | None documented |
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procedure I2SLogDebug(I2S:PI2SDevice; const AText:String); inline;
Description: To be documented
| Note | None documented |
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