Difference between revisions of "Unit Codec"

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----
 
----
  
−
'''Ultibo Codec interface unit'''
+
'''Ultibo Codec Interface unit'''
−
 
+
−
''To be documented''
+
  
 
=== Constants ===
 
=== Constants ===
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<br />  
 
<br />  
 
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<div style="font-size: 14px; padding-left: 12px;">'''Codec device type constants''' <code> CODEC_TYPE_* </code></div>
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<div style="font-size: 14px; padding-left: 12px;">'''Codec device type''' <code> CODEC_TYPE_* </code></div>
 
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<div style="font-size: 14px; padding-left: 12px;">'''Codec device state constants''' <code> CODEC_STATE_* </code></div>
+
<div style="font-size: 14px; padding-left: 12px;">'''Codec device state''' <code> CODEC_STATE_* </code></div>
 
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<div style="font-size: 14px; padding-left: 12px;">'''Codec device flag constants''' <code> CODEC_FLAG_* </code></div>
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<div style="font-size: 14px; padding-left: 12px;">'''Codec device flag''' <code> CODEC_FLAG_* </code></div>
 
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<div style="font-size: 14px; padding-left: 12px;">'''Codec logging constants''' <code> CODEC_LOG_* </code></div>
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<div style="font-size: 14px; padding-left: 12px;">'''Codec logging''' <code> CODEC_LOG_* </code></div>
 
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| <code>CODEC_LOG_LEVEL_INFO = LOG_LEVEL_INFO;</code>
 
| <code>CODEC_LOG_LEVEL_INFO = LOG_LEVEL_INFO;</code>
 
| Codec informational messages, such as a device being attached or detached
 
| Codec informational messages, such as a device being attached or detached
 +
|-
 +
| <code>CODEC_LOG_LEVEL_WARN = LOG_LEVEL_WARN;</code>
 +
| Codec warning messages
 
|-
 
|-
 
| <code>CODEC_LOG_LEVEL_ERROR = LOG_LEVEL_ERROR;</code>
 
| <code>CODEC_LOG_LEVEL_ERROR = LOG_LEVEL_ERROR;</code>
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'''Codec properties'''
 
'''Codec properties'''
  
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<pre style="border: 0; padding-bottom:0px;">PCodecProperties = ^TCodecProperties;
+
<code>PCodecProperties = ^TCodecProperties;</code>
−
TCodecProperties = record</pre>
+
 
 +
<code>TCodecProperties = record</code>
 
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|-
 
|-
−
| <code>TCodecEnumerate = function(Codec:PCodecDevice;Data:Pointer):LongWord;</code>
+
| <code>TCodecEnumerate = function(Codec:PCodecDevice; Data:Pointer):LongWord;</code>
 
| style="width: 40%;"|
 
| style="width: 40%;"|
 
|-
 
|-
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|-
 
|-
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| <code>TCodecNotification = function(Device:PDevice;Data:Pointer;Notification:LongWord):LongWord;</code>
+
| <code>TCodecNotification = function(Device:PDevice; Data:Pointer; Notification:LongWord):LongWord;</code>
 
| style="width: 40%;"|
 
| style="width: 40%;"|
 
|-
 
|-
 
|}
 
|}
  
−
'''Codec device properties'''
+
'''Codec device get properties'''
  
 
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{| class="wikitable" style="font-size: 14px; text-align: left; width: 100%; height: 50px;"
 
|-
 
|-
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| <code>TCodecDeviceProperties = function(Codec:PCodecDevice;Properties:PCodecProperties):LongWord;</code>
+
| <code>TCodecDeviceGetProperties = function(Codec:PCodecDevice; Properties:PCodecProperties):LongWord;</code>
 
| style="width: 40%;"|
 
| style="width: 40%;"|
 
|-
 
|-
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|-
 
|-
 
| <code>CodecState:LongWord;</code>
 
| <code>CodecState:LongWord;</code>
−
| Codec dveice state (eg CODEC_STATE_ENABLED)
+
| Codec device state (eg CODEC_STATE_ENABLED)
 
|-
 
|-
−
| <code>DeviceProperties:TCodecDeviceProperties;</code>
+
| <code>DeviceGetProperties:TCodecDeviceGetProperties;</code>
−
| A Device specific DeviceProperties method implementing the standard Codec device interface (Or nil if the default method is suitable)
+
| A Device specific DeviceGetProperties method implementing the standard Codec device interface (Or nil if the default method is suitable)
 
|-
 
|-
 
|colspan="2"|''Driver Properties''
 
|colspan="2"|''Driver Properties''
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|-
 
|-
 
| <code>CODEC_DEFAULT_LOG_LEVEL:LongWord = CODEC_LOG_LEVEL_DEBUG;</code>
 
| <code>CODEC_DEFAULT_LOG_LEVEL:LongWord = CODEC_LOG_LEVEL_DEBUG;</code>
−
| style="width: 65%;"|Minimum level for Codec messages. Only messages with level greater than or equal to this will be printed.
+
| style="width: 40%;"|Minimum level for Codec messages. Only messages with level greater than or equal to this will be printed.
 
|-
 
|-
 
|}
 
|}
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|-
 
|-
 
| <code>CODEC_LOG_ENABLED:Boolean;</code>
 
| <code>CODEC_LOG_ENABLED:Boolean;</code>
−
| style="width: 65%;"|
+
| style="width: 40%;"|
 
|-
 
|-
 
|}
 
|}
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|-
 
|-
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! '''Note'''
+
! Note
 
| Called only during system startup
 
| Called only during system startup
 
|-
 
|-
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<pre style="border: 0; padding-bottom:0px;">function CodecDeviceProperties(Codec:PCodecDevice; Properties:PCodecProperties):LongWord;</pre>
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<pre style="border: 0; padding-bottom:0px;">function CodecDeviceGetProperties(Codec:PCodecDevice; Properties:PCodecProperties):LongWord;</pre>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the properties for the specified Codec device</div>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the properties for the specified Codec device</div>
 
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|-
 
|-
−
! '''Codec'''
+
! Codec
 
| The Codec device to get properties from
 
| The Codec device to get properties from
 
|-
 
|-
−
! '''Properties'''
+
! Properties
 
| Pointer to a TCodecProperties structure to fill in
 
| Pointer to a TCodecProperties structure to fill in
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| ERROR_SUCCESS if completed or another error code on failure
 
| ERROR_SUCCESS if completed or another error code on failure
 
|-
 
|-
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|-
 
|-
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! '''Return'''
+
! Return
 
| Pointer to new Codec device entry or nil if Codec device could not be created
 
| Pointer to new Codec device entry or nil if Codec device could not be created
 
|-
 
|-
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|-
 
|-
−
! '''Size'''
+
! Size
 
| Size in bytes to allocate for new Codec device (Including the Codec device entry)
 
| Size in bytes to allocate for new Codec device (Including the Codec device entry)
 
|-
 
|-
−
! '''Return'''
+
! Return
 
| Pointer to new Codec device entry or nil if Codec device could not be created
 
| Pointer to new Codec device entry or nil if Codec device could not be created
 
|-
 
|-
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! '''Note'''
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! Note
 
| None documented
 
| None documented
 
|-
 
|-
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| None documented
 
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<pre style="border: 0; padding-bottom:0px;">function CodecGetCount:LongWord; inline;</pre>
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<pre style="border: 0; padding-bottom:0px;">function CodecGetCount:LongWord;</pre>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current Codec device count</div>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current Codec device count</div>
 
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<pre style="border: 0; padding-bottom:0px;">function CodecDeviceGetDefault:PCodecDevice; inline;</pre>
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<pre style="border: 0; padding-bottom:0px;">function CodecDeviceGetDefault:PCodecDevice;</pre>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current default Codec device</div>
 
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' Get the current default Codec device</div>
 
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 +
<pre style="border: 0; padding-bottom:0px;">procedure CodecLogWarn(Codec:PCodecDevice; const AText:String); inline;</pre>
 +
<div style="font-size: 14px; padding-left: 12px;">'''Description:''' To be documented</div>
 +
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|-
 
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Latest revision as of 04:03, 15 December 2022

Return to Unit Reference


Description

Ultibo Codec Interface unit

Constants


Codec specific constants CODEC_*
CODEC_NAME_PREFIX = 'Codec'; Name prefix for Codec Devices


Codec device type CODEC_TYPE_*
CODEC_TYPE_NONE = 0;  


Codec device state CODEC_STATE_*
CODEC_STATE_DISABLED = 0;  
CODEC_STATE_ENABLED = 1;  


Codec device flag CODEC_FLAG_*
CODEC_FLAG_NONE = $00000000;  


Codec logging 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_WARN = LOG_LEVEL_WARN; Codec warning messages
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 get properties

TCodecDeviceGetProperties = 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 device state (eg CODEC_STATE_ENABLED)
DeviceGetProperties:TCodecDeviceGetProperties; A Device specific DeviceGetProperties 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 CodecDeviceGetProperties(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;
Description: Get the current Codec device count
Note None documented 


function CodecDeviceGetDefault:PCodecDevice;
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 CodecLogWarn(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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