ILTDicRd Interface
This is the interface for the LEAD DICOM Reader.
Parameters
pzFileName |
Pointer to an OLECHAR string that contains the input DICOM file |
Description
Sets the input file name. Should you set the InputFileName to NULL, be sure to set an input dataset using SetDicomDS because otherwise you will have no input data and the filter will fail to connect. The function fails under the following conditions:
If the filter output pin is already connected.
If a user dataset is initialized.
If the input file contains no pixel data.
If the input file is not a valid DICOM file.
If the length of the input file name exceeds the maximum length allowed for a file name (260 characters)
The default value is "". Note that the DICOM file may contain MPEG2 data, which would require that a MPEG-2 video decoder Also known as a decompressor Also known as a decoder, this is a module or algorithm to decompress data., this is a module or algorithm to decompress data. be installed before the file could be played.
Returns
S_OK |
SUCCESS |
< 0 |
An error occurred. |
Parameters
ppszFileName |
Address of a pointer to the returned DICOM input file name. |
Description
Retrieves the input file name. This function allocates memory for the string. You are responsible for freeing the memory by using SysFreeString().
Returns
S_OK |
SUCCESS |
< 0 |
An error occurred. |
Parameters
pbConnected |
Pointer to a variable that will receive the connection state of the output pin. Possible values are: |
|
|
Value |
Meaning |
|
TRUE |
The output pin is connected. |
|
FALSE |
The output pin is not connected. |
Description
Gets a value that indicates whether the output pin is connected.
Returns
S_OK |
SUCCESS |
< 0 |
An error occurred. |
Parameters
pDS |
Address of a pointer to the returned dataset. |
Description
Retrieves the currently initialized DICOM dataset. Typecast this pointer to LDicomDS before using it. Do not make changes to the dataset after the filter is connected, since this might cause problems with the LEAD DICOM Reader.
Returns
S_OK |
SUCCESS |
< 0 |
An error occurred. |
Parameters
lFrameTime |
New frame time value in milliseconds. |
Description
Sets the frame time (the time each frame is displayed while playing the PixelData), in milliseconds. Possible values range between 20 and 1000. The Frame Control feature must be enabled in order to control the frame time (and thus the play speed). If frame time is not enabled, the stream plays with the frame time set to 40 milliseconds (25 frames per second).
Returns
S_OK |
SUCCESS |
< 0 |
An error occurred. |
Parameters
lFrameTime |
Pointer to a variable that will receive the current frame time. |
Description
Retrieves the frame time (the time each frame is displayed while playing the PixelData), in milliseconds. The default value is 40.
Returns
S_OK |
SUCCESS |
< 0 |
An error occurred. |
Parameters
bEnableFrameControl |
A Boolean value that enables or disables frame control. Possible values are: |
|
|
Value |
Meaning |
|
TRUE |
Enable frame control. |
|
FALSE |
Disable frame control. |
Description
Sets the frame control using put_FrameTime or set through the interface by using the property page.
Returns
S_OK |
SUCCESS |
< 0 |
An error occurred. |
Parameters
bEnableFrameControl |
Pointer to a variable that indicates whether frame control is enabled. Possible values are: |
|
|
Value |
Meaning |
|
TRUE |
Frame control is enabled. |
|
FALSE |
Frame control is disabled. |
Description
Retrieves a value that indicates whether frame control is enabled. The default values is FALSE.
Returns
S_OK |
SUCCESS |
< 0 |
An error occurred. |
Parameters
bEnableFrameDropping |
A Boolean variable that contains a value that indicates whether frames can be dropped. Possible values are: |
|
|
Value |
Meaning |
|
TRUE |
Frames can be dropped. |
|
FALSE |
Keep every frame. |
Description
Use this function to set the filter to drop frames when necessary in order to maintain the frame rate. To enable frame dropping set bEnableFrameDropping to TRUE. To keep every frame set bEnableFrameDropping to FALSE.
Returns
Always returns S_OK.
Parameters
pbEnableFrameDropping |
pointer to a Boolean value that indicates whether the frame dropping feature is currently set to drop frames. |
|
|
Value |
Meaning |
|
TRUE |
The filter is currently set to drop frames when necessary to maintain the frame time. |
|
FALSE |
The filter is set to keep every frame. |
Description
Gets a value that indicates whether the filter is currently set to drop frames when necessary to maintain the frame time. The default value is FALSE.
Returns
S_OK |
SUCCESS |
E_INVALIDARG |
The input pointer is invalid. |
Parameters
pDS |
Pointer to the user dataset. |
|
bCopy |
A value that specifies whether the filter should make a copy of the passed dataset for future usage. Possible values are: |
|
|
Value |
Meaning |
|
TRUE |
Make a copy of the dataset (allocating memory for it, and maintaining responsibility for freeing this memory). |
|
FALSE |
The user will take care of the pointer life (and ensure its availability for the Writer as long as it is needed). |
Description
Sets the DICOM dataset inside the LEAD DICOM Reader filter. Before using this function you need to first create and initialize a dataset using the raster toolkit and LDicomDS::InitDS and either LDicomDS::LoadDS or LDicomDS::LoadDSMemory. This function fails:
If the LEAD DICOM Reader is already connected
If the dataset contains no pixel data
If the pixel data could not be read properly.
Call this method with pDS set to NULL:
To stop the LEAD DICOM Reader from using the dataset
Before freeing the dataset's memory.
Returns
S_OK |
SUCCESS |
< 0 |
An error occurred. |
Description
Resets the LEAD DICOM Reader option values to the default values, as follows:
InputFileName = ""
FrameControl = FALSE
FrameDropping = FALSE
FrameTime = 40
Returns
Always returns S_OK.
See Also