Difference between revisions of "Unit Codec"
From Ultibo.org
| Line 84: | Line 84: | ||
---- | ---- | ||
| − | '' | + | |
| + | '''Codec Properties''' | ||
| + | |||
| + | <div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;"> | ||
| + | <pre style="border: 0; padding-bottom:0px;">PCodecProperties = ^TCodecProperties; | ||
| + | TCodecProperties = record</pre> | ||
| + | <div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;"> | ||
| + | {| class="wikitable" style="font-size: 14px; background: white;" | ||
| + | |- | ||
| + | | <code>Flags:LongWord;</code> | ||
| + | | style="width: 40%;"|Device flags (eg CODEC_FLAG_????) | ||
| + | |- | ||
| + | |} | ||
| + | </div></div> | ||
| + | <br /> | ||
| + | |||
| + | '''Codec Enumeration Callback''' | ||
| + | |||
| + | {| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;" | ||
| + | |- | ||
| + | | <code>TCodecEnumerate = function(Codec:PCodecDevice;Data:Pointer):LongWord;</code> | ||
| + | | style="width: 40%;"| | ||
| + | |- | ||
| + | |} | ||
| + | |||
| + | '''Codec Notification Callback''' | ||
| + | |||
| + | {| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;" | ||
| + | |- | ||
| + | | <code>TCodecNotification = function(Device:PDevice;Data:Pointer;Notification:LongWord):LongWord;</code> | ||
| + | | style="width: 40%;"| | ||
| + | |- | ||
| + | |} | ||
| + | |||
| + | '''Codec Device''' | ||
| + | |||
| + | {| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;" | ||
| + | |- | ||
| + | | <code>TCodecDeviceProperties = function(Codec:PCodecDevice;Properties:PCodecProperties):LongWord;</code> | ||
| + | | style="width: 40%;"| | ||
| + | |- | ||
| + | |} | ||
| + | |||
| + | '''Codec Device''' | ||
| + | |||
| + | <div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 0px; padding-bottom: 15px;"> | ||
| + | <pre style="border: 0; padding-bottom:0px;">PCodecDevice = ^TCodecDevice; | ||
| + | TCodecDevice = record</pre> | ||
| + | <div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;"> | ||
| + | {| class="wikitable" style="font-size: 14px; background: white;" | ||
| + | |- | ||
| + | |colspan="2"|Device Properties | ||
| + | |- | ||
| + | | <code>Device:TDevice;</code> | ||
| + | | The Device entry for this Codec device | ||
| + | |- | ||
| + | |colspan="2"|Codec Properties | ||
| + | |- | ||
| + | | <code>CodecId:LongWord;</code> | ||
| + | | Unique Id of this Codec device in the Codec device table | ||
| + | |- | ||
| + | | <code>CodecState:LongWord;</code> | ||
| + | | Codec dveice state (eg CODEC_STATE_ENABLED) | ||
| + | |- | ||
| + | | <code>DeviceProperties:TCodecDeviceProperties;</code> | ||
| + | | A Device specific DeviceProperties method implementing the standard Codec device interface (Or nil if the default method is suitable) | ||
| + | |- | ||
| + | |colspan="2"|Driver Properties | ||
| + | |- | ||
| + | | <code>Lock:TMutexHandle;</code> | ||
| + | | Device lock | ||
| + | |- | ||
| + | | <code>Properties:TCodecProperties;</code> | ||
| + | | Device properties | ||
| + | |- | ||
| + | |colspan="2"|Internal Properties | ||
| + | |- | ||
| + | | <code>Prev:PCodecDevice;</code> | ||
| + | | Previous entry in Codec device table | ||
| + | |- | ||
| + | | <code>Next:PCodecDevice;</code> | ||
| + | | Next entry in Codec device table | ||
| + | |- | ||
| + | |} | ||
| + | </div></div> | ||
| + | <br /> | ||
=== Public variables === | === Public variables === | ||
Revision as of 03:18, 9 January 2017
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Description
Ultibo Codec interface unit
To be documented
Constants
Codec specific constants
CODEC_* CODEC_NAME_PREFIX = 'Codec';
|
Name prefix for Codec Devices |
Codec device type constants
CODEC_TYPE_* CODEC_TYPE_NONE = 0;
|
Codec device state constants
CODEC_STATE_* CODEC_STATE_DISABLED = 0;
|
|
CODEC_STATE_ENABLED = 1;
|
Codec device flag constants
CODEC_FLAG_* CODEC_FLAG_NONE = $00000000;
|
Codec logging constants
CODEC_LOG_* CODEC_LOG_LEVEL_DEBUG = LOG_LEVEL_DEBUG;
|
Codec debugging messages |
CODEC_LOG_LEVEL_INFO = LOG_LEVEL_INFO;
|
Codec informational messages, such as a device being attached or detached |
CODEC_LOG_LEVEL_ERROR = LOG_LEVEL_ERROR;
|
Codec error messages |
CODEC_LOG_LEVEL_NONE = LOG_LEVEL_NONE;
|
No Codec messages |
Type definitions
Codec Properties
PCodecProperties = ^TCodecProperties; TCodecProperties = record
Flags:LongWord;
|
Device flags (eg CODEC_FLAG_????) |
Codec Enumeration Callback
TCodecEnumerate = function(Codec:PCodecDevice;Data:Pointer):LongWord;
|
Codec Notification Callback
TCodecNotification = function(Device:PDevice;Data:Pointer;Notification:LongWord):LongWord;
|
Codec Device
TCodecDeviceProperties = function(Codec:PCodecDevice;Properties:PCodecProperties):LongWord;
|
Codec Device
PCodecDevice = ^TCodecDevice; TCodecDevice = record
| Device Properties | |
Device:TDevice;
|
The Device entry for this Codec device |
| Codec Properties | |
CodecId:LongWord;
|
Unique Id of this Codec device in the Codec device table |
CodecState:LongWord;
|
Codec dveice state (eg CODEC_STATE_ENABLED) |
DeviceProperties:TCodecDeviceProperties;
|
A Device specific DeviceProperties method implementing the standard Codec device interface (Or nil if the default method is suitable) |
| Driver Properties | |
Lock:TMutexHandle;
|
Device lock |
Properties:TCodecProperties;
|
Device properties |
| Internal Properties | |
Prev:PCodecDevice;
|
Previous entry in Codec device table |
Next:PCodecDevice;
|
Next entry in Codec device table |
Public variables
Codec logging
CODEC_DEFAULT_LOG_LEVEL:LongWord = CODEC_LOG_LEVEL_DEBUG;
|
Minimum level for Codec messages. Only messages with level greater than or equal to this will be printed. |
CODEC_LOG_ENABLED:Boolean;
|
Function declarations
Initialization functions
procedure CodecInit;
Description: Initialize the Codec unit and Codec device table
| Note | Called only during system startup |
|---|
Codec device functions
function CodecDeviceProperties(Codec:PCodecDevice; Properties:PCodecProperties):LongWord;
Description: Get the properties for the specified Codec device
| Codec | The Codec device to get properties from |
|---|---|
| Properties | Pointer to a TCodecProperties structure to fill in |
| Return | ERROR_SUCCESS if completed or another error code on failure |
function CodecDeviceCreate:PCodecDevice;
Description: Create a new Codec device entry
| Return | Pointer to new Codec device entry or nil if Codec device could not be created |
|---|
function CodecDeviceCreateEx(Size:LongWord):PCodecDevice;
Description: Create a new Codec device entry
| Size | Size in bytes to allocate for new Codec device (Including the Codec device entry) |
|---|---|
| Return | Pointer to new Codec device entry or nil if Codec device could not be created |
function CodecDeviceDestroy(Codec:PCodecDevice):LongWord;
Description: Destroy an existing Codec device entry
| Note | None documented |
|---|
function CodecDeviceRegister(Codec:PCodecDevice):LongWord;
Description: Register a new Codec device in the Codec device table
| Note | None documented |
|---|
function CodecDeviceDeregister(Codec:PCodecDevice):LongWord;
Description: Deregister an Codec device from the Codec device table
| Note | None documented |
|---|
function CodecDeviceFind(CodecId:LongWord):PCodecDevice;
Description: To be documented
| Note | None documented |
|---|
function CodecDeviceFindByName(const Name:String):PCodecDevice; inline;
Description: To be documented
| Note | None documented |
|---|
function CodecDeviceFindByDescription(const Description:String):PCodecDevice; inline;
Description: To be documented
| Note | None documented |
|---|
function CodecDeviceEnumerate(Callback:TCodecEnumerate; Data:Pointer):LongWord;
Description: To be documented
| Note | None documented |
|---|
function CodecDeviceNotification(Codec:PCodecDevice; Callback:TCodecNotification; Data:Pointer; Notification,Flags:LongWord):LongWord;
Description: To be documented
| Note | None documented |
|---|
Codec helper functions
function CodecGetCount:LongWord; inline;
Description: Get the current Codec device count
| Note | None documented |
|---|
function CodecDeviceGetDefault:PCodecDevice; inline;
Description: Get the current default Codec device
| Note | None documented |
|---|
function CodecDeviceSetDefault(Codec:PCodecDevice):LongWord;
Description: Set the current default Codec device
| Note | None documented |
|---|
function CodecDeviceCheck(Codec:PCodecDevice):PCodecDevice;
Description: Check if the supplied Codec device is in the Codec device table
| Note | None documented |
|---|
procedure CodecLog(Level:LongWord; Codec:PCodecDevice; const AText:String);
Description: To be documented
| Note | None documented |
|---|
procedure CodecLogInfo(Codec:PCodecDevice; const AText:String); inline;
Description: To be documented
| Note | None documented |
|---|
procedure CodecLogError(Codec:PCodecDevice; const AText:String); inline;
Description: To be documented
| Note | None documented |
|---|
procedure CodecLogDebug(Codec:PCodecDevice; const AText:String); inline;
Description: To be documented
| Note | None documented |
|---|
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