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Description
Ultibo Audio interface unit
This unit provides both the Audio device interface and the generic USB audio device driver.
Constants
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Audio specific constants AUDIO_*
AUDIO_NAME_PREFIX = 'Audio';
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Name prefix for Audio Devices
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Audio device types AUDIO_TYPE_*
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Audio device states AUDIO_STATE_*
AUDIO_STATE_DISABLED = 0;
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AUDIO_STATE_ENABLED = 1;
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Audio device flags AUDIO_FLAG_*
AUDIO_FLAG_NONE = $00000000;
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Audio logging AUDIO_LOG_*
AUDIO_LOG_LEVEL_DEBUG = LOG_LEVEL_DEBUG;
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Audio debugging messages
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AUDIO_LOG_LEVEL_INFO = LOG_LEVEL_INFO;
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Audio informational messages, such as a device being attached or detached
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AUDIO_LOG_LEVEL_ERROR = LOG_LEVEL_ERROR;
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Audio error messages
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AUDIO_LOG_LEVEL_NONE = LOG_LEVEL_NONE;
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No Audio messages
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Type definitions
Audio properties
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PAudioProperties = ^TAudioProperties;
TAudioProperties = record
Flags:LongWord;
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Device flags (eg AUDIO_FLAG_????)
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Audio enumeration callback
TAudioEnumerate = function(Audio:PAudioDevice; Data:Pointer):LongWord;
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Audio notification callback
TAudioNotification = function(Device:PDevice; Data:Pointer; Notification:LongWord):LongWord;
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Audio device get properties
TAudioDeviceGetProperties = function(Audio:PAudioDevice; Properties:PAudioProperties):LongWord;
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Audio device
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PAudioDevice = ^TAudioDevice;
TAudioDevice = record
| Device Properties
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Device:TDevice;
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The Device entry for this Audio device
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| Audio Properties
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AudioId:LongWord;
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Unique Id of this Audio device in the Audio device table
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AudioState:LongWord;
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Audio device state (eg AUDIO_STATE_ENABLED)
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DeviceGetProperties:TAudioDeviceGetProperties;
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A Device specific DeviceGetProperties method implementing the standard Audio device interface (Or nil if the default method is suitable)
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| Driver Properties
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Lock:TMutexHandle;
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Device lock
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Properties:TAudioProperties;
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Device properties
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| Internal Properties
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Prev:PAudioDevice;
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Previous entry in Audio device table
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Next:PAudioDevice;
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Next entry in Audio device table
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Public variables
To be documented
Function declarations
To be documented
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