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Oracle® Multimedia Reference
11g Release 1 (11.1)

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7 Oracle Multimedia Relational Interface Reference

Application developers, who created multimedia applications without using the Oracle Multimedia object types to store and manage media data in relational tables, and who do not want to migrate their existing multimedia applications to use Oracle Multimedia objects, can use the Oracle Multimedia relational interface for managing their media data. The Oracle Multimedia relational interface consists of a set of methods for:

The primary benefit of using the Oracle Multimedia relational interface is to let application developers take advantage of Oracle Multimedia functions with only minimal changes to their applications, and all without having to change their schemas to the Oracle Multimedia objects to store their data.

The Oracle Multimedia relational interface consists of a set of static methods (see Static Methods for the Relational Interface) for the Oracle Multimedia objects: ORDAudio, ORDDoc, ORDImage, and ORDVideo. Because these are static methods, no object is instantiated. Data is passed by method arguments rather than by object attributes.

The static methods for the Oracle Multimedia objects ORDAudio, ORDDoc, ORDImage, and ORDVideo are defined in the ordaspec.sql, orddspec.sql, ordispec.sql, and ordvspec.sql files, respectively.After installation, these files are available in the Oracle home directory at:

<ORACLE_HOME>/ord/im/admin (on Linux and UNIX)

<ORACLE_HOME>\ord\im\admin (on Windows)

7.1 Important Notes

Methods related to the source of the media have ctx (RAW) as the first argument. Before calling any of these methods for the first time, the client should allocate the ctx structure and initialize it to NULL.

ORDAudio, ORDDoc, and ORDVideo methods related to media parsing have ctx (RAW) as the first argument. Before calling any of these methods for the first time, the client should allocate the ctx structure and initialize it to NULL.


Static Methods for the Relational Interface

This section presents reference information on the static methods for the relational interface. It is divided into subsections that describe the static methods that are common to all object types, and the static methods that are unique to a particular object type or are implemented differently for the different object types.

Within each subsection, the static methods are presented first as they are defined in the SQL source files. Then, each static method is described in alphabetical order within the subsection.


Static Methods Common to All Object Types

This section presents reference information on the Oracle Multimedia common static methods used for the relational interface.

The common static methods for the ORDAudio, ORDDoc, ORDImage, and ORDVideo relational interfaces are defined in the ordaspec.sql, orddspec.sql, ordispec.sql, and ordvspec.sql files, respectively.

The examples in this section assume that you have created the test tables as described in Example Audio Table Definition, Example Media Table Definition, Example Image Table Definition, and Example Video Table Definition, respectively for each object type.


export( )

Format

export(ctx IN OUT RAW,

local_data IN BLOB,

source_type IN VARCHAR2,

source_location IN VARCHAR2,

source_name IN VARCHAR2);

Description

Copies data from a local source (local_data) within the database to an external data source.

Note:

The export( ) method provides native support only when the value of the source_type parameter is FILE. In this case, the data is written to a file within a directory that is accessible to Oracle Database. User-defined sources may support the export( ) method to provide WRITE access to other types of data stores.

Parameters

ctx

The source plug-in context information.

local_data

The BLOB location that is being exported.

source_type

The type of the source data that is being exported. This parameter is not case sensitive.

source_location

The location to which the source data is to be exported.

source_name

The name of the object to where the source data is to be exported.

Usage Notes

After calling the export( ) method, you can issue a SQL DELETE statement or call the DBMS_LOB.TRIM procedure to delete the content stored locally, if desired.

The export( ) method for a source type of FILE does not modify data stored in the BLOB.

When the source_type parameter has a value of FILE, the source_location parameter specifies the name of an Oracle directory object, and the source_name parameter specifies the name of the file that will contain the data.

The export( ) method writes only to a database directory object that the user has privilege to access. That is, you can access a directory object that you have created using the SQL CREATE DIRECTORY statement, or one to which you have been granted READ and WRITE access.

For example, the following SQL*Plus commands create a directory object and grant the user mediauser permission to read and write to any file within the directory /mydir/work:

CONNECT sys/ as sysdba
Enter password: password
CREATE OR REPLACE DIRECTORY FILE_DIR AS '/mydir/work';
GRANT READ,WRITE ON DIRECTORY FILE_DIR TO mediauser;

Pragmas

None.

Exceptions

ORDSourceExceptions.INCOMPLETE_SOURCE_INFORMATION

This exception is raised if you call the export( ) method and the value of the source_type parameter is NULL.

ORDSourceExceptions.IO_ERROR

This exception is raised if the export( ) method encounters an error writing the BLOB data to the file specified.

ORDSourceExceptions.METHOD_NOT_SUPPORTED

This exception is raised if you call the export( ) method and this method is not supported by the source plug-in being used.

See Appendix H for more information about these exceptions.

Examples

Export data from a local source to an external audio data source:

Note:

Replace e:\mydir\work with the directory specification where your test file is located, replace testaud.dat with the file specification of your test file, and replace password with the system password.
CONNECT system
Enter password: password;
CREATE OR REPLACE DIRECTORY AUDIODIR AS 'e:\mydir\work';
GRANT READ ON DIRECTORY AUDIODIR TO mediauser;

CONNECT mediauser
Enter password: password;

DECLARE
  audio_data BLOB;
  ctx RAW(64) :=NULL;
BEGIN
  SELECT aud INTO audio_data FROM taud WHERE N = 1;
  ORDSYS.ORDAudio.export(ctx,audio_data,'file','AUDIODIR','testaud.dat');
EXCEPTION
  WHEN OTHERS THEN
  RAISE;
END;
/

importFrom( )

Format

importFrom(ctx IN OUT RAW,

local_data IN OUT NOCOPY BLOB,

source_type IN VARCHAR2,

source_location IN VARCHAR2,

source_name IN VARCHAR2);

Description

Transfers data from the specified external data source to the source.localData attribute (of the embedded ORDSource object type) within the database.

Parameters

ctx

The source plug-in context information. This should be allocated and initialized to NULL. If you are using a user-defined source plug-in, call the openSource( ) method. See Section 7.1 for more information.

local_data

The BLOB location to receive the data.

source_type

The type of the source data.

source_location

The location from which the source data is to be imported.

source_name

The name of the source data.

Usage Notes

You must ensure that the directory indicated by the source_location parameter exists or is created before you use this method for file sources.

Pragmas

None.

Exceptions

ORDSourceExceptions.METHOD_NOT_SUPPORTED

This exception is raised if you call the importFrom( ) method and this method is not supported by the source plug-in being used.

ORDSourceExceptions.NULL_SOURCE

This exception is raised if you call the importFrom( ) method and the value of the local_data parameter is NULL or has not been initialized.

See Appendix H for more information about these exceptions.

Examples

Import data from the specified external data source into the local source:

Note:

Replace e:\mydir\work with the directory specification where your test files are located, replace testimg.dat, testaud.dat, and testvid.dat with the file specifications of your test files, and replace password with the system password.
CONNECT system
Enter password: password;
CREATE OR REPLACE DIRECTORY DOCDIR AS 'e:\mydir\work';
GRANT READ ON DIRECTORY DOCDIR TO mediauser;

CONNECT mediauser
Enter password: password;

DECLARE
  document_data BLOB;
  ctx RAW(64) :=NULL;
BEGIN
   SELECT document INTO document_data FROM tdoc WHERE N = 1 FOR UPDATE;
   ORDSYS.ORDDoc.importFrom(ctx,document_data,'file','DOCDIR','testimg.dat');
   UPDATE tdoc SET document = document_data WHERE N = 1;
   COMMIT;
   SELECT document INTO document_data FROM tdoc WHERE N = 2 FOR UPDATE;
   ORDSYS.ORDDoc.importFrom(ctx,document_data,'file','DOCDIR','testaud.dat');
   UPDATE tdoc SET document = document_data WHERE N = 2;
   COMMIT;
   SELECT document INTO document_data FROM tdoc WHERE N = 3 FOR UPDATE;
   ORDSYS.ORDDoc.importFrom(ctx,document_data,'file','DOCDIR','testvid.dat');
   UPDATE tdoc SET document = document_data WHERE N = 3;
   COMMIT;
EXCEPTION
   WHEN OTHERS THEN
   RAISE;
END;
/

importFrom( ) (all attributes)

Format

importFrom(ctx IN OUT RAW,

local_data IN OUT NOCOPY BLOB,

source_type IN VARCHAR2,

source_location IN VARCHAR2,

source_name IN VARCHAR2,

format OUT VARCHAR2,

mime_type OUT VARCHAR2);

Description

Transfers data from the specified external data source to the source.localData attribute (of the embedded ORDSource object type) within the database.

Parameters

ctx

The source plug-in context information.

local_data

The BLOB location to receive the data.

source_type

The type of the source data.

source_location

The location from which the source data is to be imported.

source_name

The name of the source data.

format

The format of the data. The value is returned if it is available (from HTTP sources).

mime_type

The MIME type of the data. The value is returned if it is available (from HTTP sources).

Usage Notes

You must ensure that the directory indicated by the source_location parameter exists or is created before you use this method for file sources.

Pragmas

None.

Exceptions

ORDSourceExceptions.METHOD_NOT_SUPPORTED

This exception is raised if you call the importFrom( ) method and this method is not supported by the source plug-in being used.

ORDSourceExceptions.NULL_SOURCE

This exception is raised if you call the importFrom( ) method and the value of the local_data parameter is NULL or has not been initialized.

See Appendix H for more information about these exceptions.

Examples

Import image data from the specified external data source into the local source:

Note:

Replace e:\mydir\work with the directory specification where your test file is located, replace testimg.dat with the file specification of your test file, and replace password with the system password.
CONNECT system
Enter password: password;
CREATE OR REPLACE DIRECTORY IMAGEDIR AS 'e:\mydir\work';
GRANT READ ON DIRECTORY IMAGEDIR TO user;

CONNECT user
Enter password: password;

DECLARE
  image_data BLOB;
  ctx RAW(64) :=NULL;
  img_format     VARCHAR2(32)  := NULL;
  img_mime_type  VARCHAR2(80);
BEGIN
   SELECT img INTO image_data FROM timg WHERE N = 1 FOR UPDATE;
   ORDSYS.ORDImage.importFrom(ctx,image_data,'file','IMAGEDIR','testimg.dat',img_format,img_mime_type);
   UPDATE timg SET img = image_data WHERE N = 1;
   COMMIT;
EXCEPTION
   WHEN OTHERS THEN
   RAISE;
END;
/

Static Methods Unique to the ORDAudio Object Type Relational Interface

This section presents reference information on the Oracle Multimedia static methods unique to the ORDAudio relational interface.

The relational interface adds Oracle Multimedia support to audio data stored in BLOBs and BFILEs rather than in the ORDAudio object type. The static methods unique to the ORDAudio relational interface are defined in the ordaspec.sql file.

Example Audio Table Definition

The methods described in this section show examples based on a test audio table TAUD. Refer to the TAUD table definition that follows when reading through the examples:

TAUD Table Definition

CREATE TABLE taud(n                NUMBER, 
                  aud              BLOB,
                  attributes       CLOB,
                  mimetype         VARCHAR2(4000),
                  format           VARCHAR2(31),
                  encoding         VARCHAR2(256),
                  numberofchannels INTEGER,
                  samplingrate     INTEGER,
                  samplesize       INTEGER,
                  compressiontype  VARCHAR2(4000),
                  audioduration    INTEGER)
LOB(aud) STORE AS SECUREFILE;

INSERT INTO taud VALUES(1,EMPTY_BLOB(),EMPTY_CLOB(), NULL, NULL, NULL, NULL,
   NULL, NULL, NULL, NULL);
INSERT INTO taud VALUES(2,EMPTY_BLOB(),EMPTY_CLOB(), NULL, NULL, NULL, NULL,
   NULL, NULL, NULL, NULL);
COMMIT;

getProperties( ) for BFILEs

Format

getProperties(ctx IN OUT RAW,

audioBfile IN OUT NOCOPY BFILE,

attributes IN OUT NOCOPY CLOB,

format IN VARCHAR2);

Description

Reads the audio BFILE data to get the values of the media attributes for supported formats, and then stores them in the input CLOB. This method populates the CLOB with an extensive set of format and application properties in XML form.

Parameters

ctx

The format plug-in context information.

audioBfile

The audio data represented as a BFILE.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with an extensive set of format and application properties of the audio BFILE data in XML form.

format

The format of the audio data. If a non-NULL value is specified for this parameter, then the format plug-in for this format type is invoked.

Usage Notes

None.

Pragmas

None.

Exceptions

ORDAudioExceptions.AUDIO_PLUGIN_EXCEPTION

This exception is raised if you call the getProperties( ) method and the audio plug-in raises an exception.

ORDSourceExceptions.EMPTY_SOURCE

This exception is raised when the value of the source.local attribute is 1 or 0 (TRUE), but the value of the source.localData attribute is NULL.

See Appendix H for more information about these exceptions.

Examples

Get the property information for known audio attributes:

DECLARE
  aud_attrib CLOB;
  ctx RAW(64) :=NULL;
  aud_data BFILE := BFILENAME('AUDIODIR','testaud.dat');
  aud_format VARCHAR2(160) := NULL;
BEGIN
  DBMS_LOB.CREATETEMPORARY(aud_attrib, FALSE, DBMS_LOB.CALL);
  ORDSYS.ORDAudio.getProperties(ctx, aud_data, aud_attrib, aud_format);

  DBMS_OUTPUT.put_line('Size of XML Annotations ' ||
                   TO_CHAR(DBMS_LOB.GETLENGTH(aud_attrib)));
EXCEPTION
  WHEN OTHERS THEN
  RAISE;
END;
/

getProperties( ) (all attributes) for BFILEs

Format

getProperties(ctx IN OUT RAW,

audioBfile IN OUT NOCOPY BFILE,

attributes IN OUT NOCOPY CLOB,

mimeType OUT VARCHAR2,

format IN OUT VARCHAR2

encoding OUT VARCHAR2,

numberOfChannels OUT INTEGER,

samplingRate OUT INTEGER,

sampleSize OUT INTEGER,

compressionType OUT VARCHAR2,

audioDuration OUT INTEGER);

Description

Reads the audio BFILE data to get the values of the media attributes for supported formats, and then stores them in the input CLOB and returns them as explicit parameters. This method gets the properties for the following attributes of the audio data: duration, MIME type, compression type, format, encoding type, number of channels, sampling rate, and sample size. It populates the CLOB with an extensive set of format and application properties in XML form.

Parameters

ctx

The format plug-in context information.

audioBfile

The audio data represented as a BFILE.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with an extensive set of format and application properties of the audio BFILE data in XML form.

mimeType

The MIME type of the audio data.

format

The format of the audio data. If a non-NULL value is specified, then the format plug-in for this format type is invoked. If not specified, the default plug-in is used and the derived format value is returned.

encoding

The encoding type of the audio data.

numberOfChannels

The number of channels in the audio data.

samplingRate

The sampling rate in samples per second at which the audio data was recorded.

sampleSize

The sample width or number of samples of audio in the data.

compressionType

The compression type of the audio data.

audioDuration

The total time required to play the audio data.

Usage Notes

If a property cannot be extracted from the media source, then the respective parameter is set to NULL.

Pragmas

None.

Exceptions

ORDAudioExceptions.AUDIO_PLUGIN_EXCEPTION

This exception is raised if you call the getProperties( ) method and the audio plug-in raises an exception.

ORDSourceExceptions.EMPTY_SOURCE

This exception is raised when the value of the source.local attribute is 1 or 0 (TRUE), but the value of the source.localData attribute is NULL.

See Appendix H for more information about these exceptions.

Examples

Get the property information for known audio attributes:

DECLARE
  aud_attrib        CLOB;
  ctx               RAW(64) :=NULL;
  data              BFILE := BFILENAME('AUDIODIR','testaud.dat');
  mimeType          VARCHAR2(80);
  format            VARCHAR2(32) := NULL;
  encoding          VARCHAR2(160);
  numberOfChannels  NUMBER;
  samplingRate      NUMBER;
  sampleSize        NUMBER;
  compressionType   VARCHAR2(160);
  audioDuration     NUMBER;
BEGIN
  DBMS_LOB.CREATETEMPORARY(aud_attrib, FALSE, DBMS_LOB.CALL);

  ORDSYS.ORDAudio.getProperties(ctx, data, aud_attrib, mimeType, format, encoding, 
              numberOfChannels, samplingRate, sampleSize, compressionType,
 audioDuration);

  DBMS_OUTPUT.put_line('Size of XML Annotations ' ||
                   TO_CHAR(DBMS_LOB.GETLENGTH(aud_attrib)));
  DBMS_OUTPUT.put_line('mimeType: ' || mimeType );
  DBMS_OUTPUT.put_line('format: ' || format );
  DBMS_OUTPUT.put_line('encoding: ' || encoding );
  DBMS_OUTPUT.put_line('numberOfChannels: ' || numberOfChannels );
  DBMS_OUTPUT.put_line('samplingRate: ' || samplingRate );
  DBMS_OUTPUT.put_line('sampleSize: ' || sampleSize );
  DBMS_OUTPUT.put_line('compressionType: ' || compressionType );
  DBMS_OUTPUT.put_line('audioDuration: ' || audioDuration );
EXCEPTION
  WHEN OTHERS THEN
  RAISE;
END;
/


getProperties( ) for BLOBs

Format

getProperties(ctx IN OUT RAW,

audioBlob IN BLOB,

attributes IN OUT NOCOPY CLOB,

format IN VARCHAR2);

Description

Reads the audio BLOB data to get the values of the media attributes for supported formats, and then stores them in the input CLOB. This method populates the CLOB with an extensive set of format and application properties in XML form.

Parameters

ctx

The format plug-in context information.

audioBlob

The audio data represented as a BLOB.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with an extensive set of format and application properties of the audio BLOB data in XML form.

format

The format of the audio data. If a non-NULL value is specified for this parameter, then the format plug-in for this format type is invoked; otherwise, the default plug-in is used.

Usage Notes

None.

Pragmas

None.

Exceptions

ORDAudioExceptions.AUDIO_PLUGIN_EXCEPTION

This exception is raised if you call the getProperties( ) method and the audio plug-in raises an exception.

ORDSourceExceptions.EMPTY_SOURCE

This exception is raised when the value of the source.local attribute is 1 or 0 (TRUE), but the value of the source.localData attribute is NULL.

See Appendix H for more information about these exceptions.

Examples

Get the property information for known audio attributes:

DECLARE
  aud_attrib CLOB;
  ctx RAW(64) :=NULL;
  aud_data BLOB;
  aud_format VARCHAR2(160) := NULL;
BEGIN
  SELECT aud, attributes INTO aud_data, aud_attrib FROM taud WHERE N =1 FOR UPDATE;
  ORDSYS.ORDAudio.getProperties(ctx,aud_data,aud_attrib,aud_format);
  DBMS_OUTPUT.put_line('Size of XML Annotations: ' || 
                  TO_CHAR(DBMS_LOB.GETLENGTH(aud_attrib)));
  UPDATE taud SET attributes=aud_attrib WHERE N=1;
  COMMIT;
EXCEPTION
  WHEN OTHERS THEN
  RAISE;
END;
/

getProperties( ) (all attributes) for BLOBs

Format

getProperties(ctx IN OUT RAW,

audioBlob IN BLOB,

attributes IN OUT NOCOPY CLOB,

mimeType OUT VARCHAR2,

format IN OUT VARCHAR2

encoding OUT VARCHAR2,

numberOfChannels OUT INTEGER,

samplingRate OUT INTEGER,

sampleSize OUT INTEGER,

compressionType OUT VARCHAR2,

audioDuration OUT INTEGER);

Description

Reads the audio BLOB data to get the values of the media attributes for supported formats, and then stores them in the input CLOB and returns them as explicit parameters. This method gets the properties for the following attributes of the audio data: duration, MIME type, compression type, format, encoding type, number of channels, sampling rate, and sample size. It populates the CLOB with an extensive set of format and application properties in XML form.

Parameters

ctx

The format plug-in context information.

audioBlob

The audio data represented as a BLOB.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with an extensive set of format and application properties of the audio BLOB data in XML form.

mimeType

The MIME type of the audio data.

format

The format of the audio data. If a non-NULL value is specified, then the format plug-in for this format type is invoked. If not specified, the derived format value is returned.

encoding

The encoding type of the audio data.

numberOfChannels

The number of channels in the audio data.

samplingRate

The sampling rate in samples per second at which the audio data was recorded.

sampleSize

The sample width or number of samples of audio in the data.

compressionType

The compression type of the audio data.

audioDuration

The total time required to play the audio data.

Usage Notes

If a property cannot be extracted from the media source, then the respective parameter is set to NULL.

Pragmas

None.

Exceptions

ORDAudioExceptions.AUDIO_PLUGIN_EXCEPTION

This exception is raised if you call the getProperties( ) method and the audio plug-in raises an exception.

ORDSourceExceptions.EMPTY_SOURCE

This exception is raised when the value of the source.local attribute is 1 or 0 (TRUE), but the value of the source.localData attribute is NULL.

See Appendix H for more information about these exceptions.

Examples

Get the property information for known audio attributes:

DECLARE
  aud_attrib        CLOB;
  ctx               RAW(64) := NULL;
  aud_data          BLOB;
  mimeType          VARCHAR2(80);
  format            VARCHAR2(32) := NULL;
  encoding          VARCHAR2(160);
  numberOfChannels  NUMBER;
  samplingRate      NUMBER;
  sampleSize        NUMBER;
  compressionType   VARCHAR2(160);
  audioDuration     NUMBER;
BEGIN
  SELECT aud, attributes, mimetype, format, encoding, numberofchannels, samplingrate,
    samplesize, compressiontype, audioduration INTO aud_data, aud_attrib, mimeType,
    format, encoding, numberOfChannels, samplingRate, sampleSize, compressionType,
    audioDuration FROM taud WHERE N = 1 FOR UPDATE;

  ORDSYS.ORDAudio.getProperties(ctx, aud_data, aud_attrib, mimeType, format, encoding, 
              numberOfChannels, samplingRate, sampleSize, compressionType, audioDuration);

  DBMS_OUTPUT.put_line('Size of XML Annotations ' ||
                   TO_CHAR(DBMS_LOB.GETLENGTH(aud_attrib)));
  DBMS_OUTPUT.put_line('mimeType: ' || mimeType );
  DBMS_OUTPUT.put_line('format: ' || format );
  DBMS_OUTPUT.put_line('encoding: ' || encoding );
  DBMS_OUTPUT.put_line('numberOfChannels: ' || numberOfChannels );
  DBMS_OUTPUT.put_line('samplingRate: ' || samplingRate );
  DBMS_OUTPUT.put_line('sampleSize: ' || sampleSize );
  DBMS_OUTPUT.put_line('compressionType: ' || compressionType );
  DBMS_OUTPUT.put_line('audioDuration: ' || audioDuration );
  UPDATE taud SET 
               aud=aud_data, 
               attributes=aud_attrib, 
               mimetype=mimeType,
               format=format, 
               encoding=encoding, 
               numberofchannels=numberOfChannels, 
               samplingrate=samplingRate, 
               samplesize=sampleSize, 
               compressiontype=compressionType, 
               audioduration=audioDuration 
             WHERE n=1;
  COMMIT;
EXCEPTION
  WHEN OTHERS THEN
  RAISE;
END;
/

Static Methods Unique to the ORDDoc Object Type Relational Interface

This section presents reference information on the Oracle Multimedia static methods unique to the ORDDoc relational interface.

The relational interface adds Oracle Multimedia support to audio, image, video, and other heterogeneous media data stored in BLOBs and BFILEs rather than in the ORDDoc object type. The static methods unique to the ORDDoc relational interface are defined in the orddspec.sql file.

Example Media Table Definition

The methods described in this section show examples based on a test document table TDOC. Refer to the TDOC table definition that follows when reading through the examples:

TDOC Table Definition

CREATE TABLE tdoc(n             NUMBER, 
                  document      BLOB, 
                  attributes    CLOB,
                  mimetype      VARCHAR2(80),
                  format        VARCHAR2(80),
                  contentlength INTEGER)
LOB(document) STORE AS SECUREFILE;

INSERT INTO tdoc VALUES(1, EMPTY_BLOB(), EMPTY_CLOB(), NULL, NULL, NULL);
INSERT INTO tdoc VALUES(2, EMPTY_BLOB(), EMPTY_CLOB(), NULL, NULL, NULL);
INSERT INTO tdoc VALUES(3, EMPTY_BLOB(), EMPTY_CLOB(), NULL, NULL, NULL);
INSERT INTO tdoc VALUES(4, EMPTY_BLOB(), EMPTY_CLOB(), NULL, NULL, NULL);
COMMIT;

getProperties( ) for BFILEs

Format

getProperties(ctx IN OUT RAW,

docBfile IN OUT NOCOPY BFILE,

attributes IN OUT NOCOPY CLOB,

format IN VARCHAR2);

Description

Reads the document BFILE data to get the values of the media attributes, and then stores them in the input CLOB. It populates the CLOB with an extensive set of format and application properties in XML form.

Parameters

ctx

The format plug-in context information.

docBfile

The document data represented as a BFILE.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with an extensive set of format and application properties of the document BFILE data in XML form.

format

The format of the document data. If a non-NULL value is specified, then the format plug-in for this format type is invoked.

Usage Notes

None.

Pragmas

None.

Exceptions

ORDDocExceptions.DOC_PLUGIN_EXCEPTION

This exception is raised if you call the getProperties( ) method and the document plug-in raises an exception.

ORDSourceExceptions.EMPTY_SOURCE

This exception is raised when the value of the source.local attribute is 1 or 0 (TRUE), but the value of the source.localData attribute is NULL.

See Appendix H for more information about these exceptions.

Examples

Get the property information for known document attributes:

DECLARE
  doc_attrib CLOB;
  ctx RAW(64) :=NULL;
  doc_data BFILE := BFILENAME('DOCDIR','testvid.dat');
  doc_format VARCHAR2(160) := NULL;
BEGIN
   DBMS_LOB.CREATETEMPORARY(doc_attrib, FALSE, DBMS_LOB.CALL);
   ORDSYS.ORDDoc.getProperties(ctx, doc_data, doc_attrib, doc_format);

   DBMS_OUTPUT.put_line('Size of XML Annotations ' ||
                   TO_CHAR(DBMS_LOB.GETLENGTH(doc_attrib)));
EXCEPTION
   WHEN OTHERS THEN
   RAISE;
END;
/

getProperties( ) (all attributes) for BFILEs

Format

getProperties(ctx IN OUT RAW,

docBfile IN OUT NOCOPY BFILE,

attributes IN OUT NOCOPY CLOB,

mimeType OUT VARCHAR2,

format IN OUT VARCHAR2,

contentLength OUT INTEGER);

Description

Reads the document BFILE data to get the values of the media attributes for supported formats, and then stores them in the input CLOB and returns them as explicit parameters. This method gets the properties for the following attributes of the document data: MIME type, content length, and format. It populates the CLOB with an extensive set of format and application properties in XML form.

Parameters

ctx

The format plug-in context information.

docBfile

The document data represented as a BFILE.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with an extensive set of format and application properties of the document BFILE data in XML form.

mimeType

The MIME type of the document data.

format

The format of the document data. If a non-NULL value is specified, then the format plug-in for this format type is invoked. If not specified, the derived format is returned.

contentLength

The length of the content, in bytes.

Usage Notes

If a property cannot be extracted from the media source, then the respective parameter is set to NULL.

Pragmas

None.

Exceptions

ORDDocExceptions.DOC_PLUGIN_EXCEPTION

This exception is raised if you call the getProperties( ) method and the document plug-in raises an exception.

ORDSourceExceptions.EMPTY_SOURCE

This exception is raised when the value of the source.local attribute is 1 or 0 (TRUE), but the value of the source.localData attribute is NULL.

See Appendix H for more information about these exceptions.

Examples

Get the property information for known document attributes:

DECLARE
  doc_attrib        CLOB;
  ctx               RAW(64) :=NULL;
  doc_data          BFILE := BFILENAME('DOCDIR','testimg.dat');
  doc_mimeType      VARCHAR2(80);
  doc_format        VARCHAR2(32) := NULL;
  doc_contentLength NUMBER;
BEGIN
   DBMS_LOB.CREATETEMPORARY(doc_attrib, FALSE, DBMS_LOB.CALL);
   ORDSYS.ORDDoc.getProperties(ctx, doc_data, doc_attrib, 
                  doc_mimeType, doc_format, doc_contentLength);
   DBMS_OUTPUT.put_line('Size of XML Annotations ' || TO_CHAR(DBMS_LOB.GETLENGTH(doc_attrib)));
   DBMS_OUTPUT.put_line('mimeType: ' || doc_mimeType );
   DBMS_OUTPUT.put_line('format: ' || doc_format );
   DBMS_OUTPUT.put_line('contentLength: ' || doc_contentLength );
EXCEPTION
   WHEN OTHERS THEN
   RAISE;
END;
/

getProperties( ) for BLOBs

Format

getProperties(ctx IN OUT RAW,

docBlob IN BLOB,

attributes IN OUT NOCOPY CLOB,

format IN VARCHAR2);

Description

Reads the document BLOB data to get the values of the media attributes, and then stores them in the input CLOB. This method populates the CLOB with an extensive set of format and application properties in XML form.

Parameters

ctx

The format plug-in context information.

docBlob

The document data represented as a BLOB.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with an extensive set of format and application properties of the document BLOB data in XML form.

format

The format of the document data. If a non-NULL value is specified, then the format plug-in for this format type is invoked.

Usage Notes

None.

Pragmas

None.

Exceptions

ORDDocExceptions.DOC_PLUGIN_EXCEPTION

This exception is raised if you call the getProperties( ) method and the document plug-in raises an exception.

ORDSourceExceptions.EMPTY_SOURCE

This exception is raised when the value of the source.local attribute is 1 or 0 (TRUE), but the value of the source.localData attribute is NULL.

See Appendix H for more information about these exceptions.

Examples

Get the property information for known document attributes:

DECLARE
  doc_attrib CLOB;
  ctx RAW(64) :=NULL;
  doc_data BLOB;
  doc_format VARCHAR2(160) := NULL;

BEGIN
    SELECT document,attributes INTO doc_data,doc_attrib FROM tdoc WHERE N = 1 FOR UPDATE;
   ORDSYS.ORDDoc.getProperties(ctx, doc_data, doc_attrib, doc_format);

   DBMS_OUTPUT.put_line('Size of XML Annotations ' ||
                   TO_CHAR(DBMS_LOB.GETLENGTH(doc_attrib)));
   UPDATE tdoc SET document=doc_data, attributes=doc_attrib WHERE N=1;
   COMMIT;
   EXCEPTION
      WHEN OTHERS THEN
      RAISE;
END;
/

getProperties( ) (all attributes) for BLOBs

Format

getProperties(ctx IN OUT RAW,

docBlob IN BLOB,

attributes IN OUT NOCOPY CLOB,

mimeType OUT VARCHAR2,

format IN OUT VARCHAR2,

contentLength OUT INTEGER);

Description

Reads the document BLOB data to get the values of the media attributes, and then stores them in the input CLOB and returns them as explicit parameters. This method gets the properties for the following attributes of the document data: MIME type, content length, and format. It populates the CLOB with an extensive set of format and application properties in XML form.

Parameters

ctx

The format plug-in context information.

docBlob

The document data represented as a BLOB.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with an extensive set of format and application properties of the document BLOB data in XML form.

mimeType

The MIME type of the document data.

format

The format of the document data. If a non-NULL value is specified, then the format plug-in for this format type is invoked.

contentLength

The length of the content, in bytes.

Usage Notes

If a property cannot be extracted from the media source, then the respective parameter is set to NULL.

Pragmas

None.

Exceptions

ORDDocExceptions.DOC_PLUGIN_EXCEPTION

This exception is raised if you call the getProperties( ) method and the document plug-in raises an exception.

ORDSourceExceptions.EMPTY_SOURCE

This exception is raised when the value of the source.local attribute is 1 or 0 (TRUE), but the value of the source.localData attribute is NULL.

See Appendix H for more information about these exceptions.

Examples

Get the property information for known document attributes:

DECLARE
  doc_attrib        CLOB;
  ctx               RAW(64) :=NULL;
  doc_data          BLOB;
  doc_mimeType      VARCHAR2(80);
  doc_format        VARCHAR2(32):=NULL;
  doc_contentLength NUMBER;
BEGIN
   SELECT document, attributes, mimetype, format, contentlength INTO doc_data, 
     doc_attrib, doc_mimeType, doc_format, doc_contentLength FROM tdoc 
     WHERE N = 1 FOR UPDATE;

   ORDSYS.ORDDoc.getProperties(ctx, doc_data, doc_attrib, 
                  doc_mimeType, doc_format, doc_contentLength);

   DBMS_OUTPUT.put_line('Size of XML Annotations ' ||
                   TO_CHAR(DBMS_LOB.GETLENGTH(doc_attrib)));
   DBMS_OUTPUT.put_line('mimeType: ' || doc_mimeType );
   DBMS_OUTPUT.put_line('format: ' || doc_format );
   DBMS_OUTPUT.put_line('contentLength: ' || doc_contentLength );
   UPDATE tdoc SET 
     document=doc_data, 
     attributes=doc_attrib, 
     mimetype=doc_mimeType, 
     format=doc_format, 
     contentlength=doc_contentLength 
    WHERE N=1;
   COMMIT;
EXCEPTION
   WHEN OTHERS THEN
   RAISE;
END;
/

Static Methods Unique to the ORDImage Object Type Relational Interface

This section presents reference information on the Oracle Multimedia static methods unique to the ORDImage relational interface.

The relational interface adds Oracle Multimedia support to image data stored in BLOBs and BFILEs rather than in the ORDImage object type. The static methods unique to the ORDImage relational interface are defined in the ordispec.sql file.

Example Image Table Definition

The methods described in this section show examples based on a test image table TIMG. Refer to the TIMG table definition that follows when reading through the examples:

TIMG Table Definition

CREATE TABLE timg(n NUMBER, 
                  img BLOB,
                  attributes CLOB,
                  mimetype VARCHAR2(4000),
                  width INTEGER,
                  height INTEGER,
                  fileformat VARCHAR2(4000),
                  contentformat VARCHAR2(4000),
                  compressionformat VARCHAR2(4000),
                  contentlength INTEGER)
LOB(img) STORE AS SECUREFILE;

INSERT INTO timg VALUES(1, EMPTY_BLOB(), EMPTY_CLOB(), NULL, 
                        NULL, NULL, NULL, NULL, NULL, NULL);
INSERT INTO timg VALUES(2, EMPTY_BLOB(), EMPTY_CLOB(), NULL, 
                        NULL, NULL, NULL, NULL, NULL, NULL);
COMMIT;

getDicomMetadata( ) for BFILEs

Format

getDicomMetadata(imageBfile IN BFILE,

optionString IN VARCHAR2)

RETURN XMLType;

Description

Returns an XML representation of the metadata extracted from the DICOM image stored in the BFILE. See Appendix F for information about the XML schema for DICOM.

Parameters

imageBfile

The DICOM image data represented as a BFILE.

optionString

A string that specifies the type of DICOM metadata to extract. For this release, the only valid value is imageGeneral. All other values are ignored.

Usage Notes

The DICOM standard defines many sets of rules for encoding a DICOM object in a binary stream. See Appendix G for information about the DICOM encoding rules supported by Oracle Multimedia.

See Oracle Multimedia User's Guide for more information about the DICOM feature.

Pragmas

None.

Exceptions

ORDImageExceptions.NULL_CONTENT

This exception is raised when the image is NULL.

See Appendix H for more information about this exception.

Examples

DECLARE
    local_imageBFile BFILE;
    dicom_metadata XMLType := NULL;
 
BEGIN
    SELECT imageBFile INTO local_imageBFile FROM medicalImageFilesTable WHERE id = 1;
    dicom_metadata := ORDSYS.ORDImage.getDicomMetadata(local_imageBfile,'imageGeneral');
    IF (dicom_metadata is NULL) THEN
        DBMS_OUTPUT.PUT_LINE('dicom metadata is NULL');
    END IF;
 
    -- print the value of the one of the elements in extracted
    -- dicom metadata
 
    DBMS_OUTPUT.PUT_LINE('namespace: ' || dicom_metadata.getNamespace() );
 
    EXCEPTION
    WHEN ORDSYS.ORDImageExceptions.NULL_CONTENT THEN
       DBMS_OUTPUT.PUT_LINE('imageBfile is null ');
    WHEN OTHERS THEN
       RAISE;
END;/

getDicomMetadata( ) for BLOBs

Format

getDicomMetadata(imageBlob IN BLOB,

optionString IN VARCHAR2)

RETURN XMLType;

Description

Returns an XML representation of the metadata extracted from the DICOM image stored in the BLOB. See Appendix F for information about the XML schema for DICOM.

Parameters

imageBlob

The DICOM image data represented as a BLOB.

optionString

A string that specifies the type of DICOM metadata to extract. For this release, the only valid value is imageGeneral. All other values are ignored.

Usage Notes

The DICOM standard defines many sets of rules for encoding aDICOM object in a binary stream. See Appendix G for information about the DICOM encoding rules supported by Oracle Multimedia.

See Oracle Multimedia User's Guide for more information about the DICOM feature.

Pragmas

None.

Exceptions

ORDImageExceptions.NULL_CONTENT

This exception is raised when the image is NULL.

See Appendix H for more information about this exception.

Examples

DECLARE
    local_imageBlob BLOB;
    dicom_metadata XMLType := NULL;
 
BEGIN
    SELECT imageBlob INTO local_imageBlob FROM medicalImageBlobsTable WHERE id = 1;
    dicom_metadata := ORDSYS.ORDImage.getDicomMetadata(local_imageBlob,'imageGeneral');
    IF (dicom_metadata is NULL) THEN
        DBMS_OUTPUT.PUT_LINE('dicom metadata is NULL');
    END IF;
 
    -- print the value of the one of the elements in extracted
    -- dicom metadata
 
    DBMS_OUTPUT.PUT_LINE('namespace: ' || dicom_metadata.getNamespace() );
 
    EXCEPTION
    WHEN ORDSYS.ORDImageExceptions.NULL_CONTENT THEN
       DBMS_OUTPUT.PUT_LINE('imageBlob is null ');
    WHEN OTHERS THEN
       RAISE;
END;/

getMetadata( ) for BFILEs

Format

getMetadata(imageBfile IN NOCOPY BFILE,

metadataType IN VARCHAR2 DEFAULT 'ALL'

RETURN XMLSequenceType;

Description

Extracts the specified types of metadata from the imageBfile and returns an array of schema valid XML documents. If no matching metadata is found, an empty array is returned.

Parameters

imageBfile

The image data represented as a BFILE.

metadataType

A string that identifies the types of embedded metadata to extract. Valid values are ALL, ORDIMAGE, XMP, EXIF, and IPTC-IIM. The default value is ALL.

Usage Notes

When the value of input parameter metadataType is ALL, and more than one type of supported metadata is present in the image, this method returns several XML documents, one for each type of metadata found. For other values of the input parameter, the method returns zero or one XML document.

Each document is stored as an instance of XMLType, and is based on one of the metadata schemas. The method XMLType.getNamespace( ) can be used to determine the type of metadata represented in that document.

See Appendix F for a description of the supported metadata schemas.

See Oracle Multimedia User's Guide for more information about the metadata feature.

Pragmas

None.

Exceptions

ORDImageExceptions.NULL_CONTENT

This exception is raised when the imageBfile parameter is NULL.

See Appendix H for more information about this exception.

Examples

DECLARE 
  imageBfile  BFILE := BFILENAME('MEDIA_DIR','keyboard.jpg');
  metav       XMLSequenceType; 
BEGIN  
 
  metav := ORDSYS.ORDImage.getMetadata(imageBfile, 'ALL'); 
 
  -- print the namespace of each metadata document
  FOR i in 1..metav.count LOOP
    DBMS_OUTPUT.PUT_LINE('namespace: ' || metav(i).getNamespace() );
  END LOOP; 
 
  EXCEPTION 
  WHEN ORDSYS.ORDImageExceptions.NULL_CONTENT THEN 
    DBMS_OUTPUT.PUT_LINE('imageBlob is null'); 
  WHEN OTHERS THEN 
    RAISE;
END; /

getMetadata( ) for BLOBs

Format

getMetadata(imageBlob IN NOCOPY BLOB,

metadataType IN VARCHAR2 DEFAULT 'ALL')

RETURN XMLSequenceType;

Description

Extracts the specified types of metadata from the imageBlob and returns an array of schema valid XML documents. If no matching metadata is found, an empty array is returned.

Parameters

imageBlob

The image data represented as a BLOB.

metadataType

A string that identifies the types of embedded metadata to extract. Valid values are ALL, ORDIMAGE, XMP, EXIF, and IPTC-IIM. The default value is ALL.

Usage Notes

When the value of input parameter metadataType is ALL, and more than one type of supported metadata is present in the image, this method returns several XML documents, one for each type of metadata found. For other values of the input parameter, the method returns zero or one XML document.

Each document is stored as an instance of XMLType, and is based on one of the metadata schemas. The method XMLType.getNamespace( ) can be used to determine the type of metadata represented in that document.

See Appendix F for a description of the supported metadata schemas.

See Oracle Multimedia User's Guide for more information about the metadata feature.

Pragmas

None.

Exceptions

ORDImageExceptions.NULL_CONTENT

This exception is raised when the imageBlob parameter is NULL.

See Appendix H for more information about this exception.

Examples

DECLARE 
  imageBlob BLOB;
  metav     XMLSequenceType; 
BEGIN 
  SELECT ad_photo
  INTO imageBlob 
  FROM pm.print_media
  WHERE product_id = 3106; 
 
  metav := ORDSYS.ORDImage.getMetadata(imageBlob, 'ALL'); 
 
  -- print the namespace of each metadata document
  FOR i in 1..metav.count LOOP
    DBMS_OUTPUT.PUT_LINE('namespace: ' || metav(i).getNamespace() );
  END LOOP; 
 
  EXCEPTION 
  WHEN ORDSYS.ORDImageExceptions.NULL_CONTENT THEN 
    DBMS_OUTPUT.PUT_LINE('imageBlob is null'); 
  WHEN OTHERS THEN
    RAISE;
END; /

getProperties( ) for BFILEs

Format

getProperties(imageBfile IN OUT NOCOPY BFILE,

attributes IN OUT NOCOPY CLOB);

Description

Reads the image BFILE data to get the values of the media attributes for supported formats, and then stores them in the input CLOB. This method populates the CLOB with a set of format properties in XML form.

Parameters

imageBfile

The image data represented as a BFILE.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with a set of format properties of the image BFILE data in XML form.

Usage Notes

None.

Pragmas

None.

Exceptions

ORDImageExceptions.NULL_CONTENT

This exception is raised when the imageBfile parameter is NULL.

See Appendix H for more information about this exception.

Examples

Get the property information for known image attributes:

DECLARE
  img_attrib CLOB;
  data BFILE := BFILENAME('IMAGEDIR','testimg.dat');
BEGIN
   DBMS_LOB.CREATETEMPORARY(img_attrib, FALSE, DBMS_LOB.CALL);
   ORDSYS.ORDImage.getProperties(data, img_attrib);

   DBMS_OUTPUT.put_line('Size of XML Annotations ' ||
                   TO_CHAR(DBMS_LOB.GETLENGTH(img_attrib)));
EXCEPTION
   WHEN OTHERS THEN
   RAISE;
END;
/

getProperties( ) (all attributes) for BFILEs

Format

getProperties(imageBfile IN OUT NOCOPY BFILE,

attributes IN OUT NOCOPY CLOB,

mimeType OUT VARCHAR2,

width OUT INTEGER,

height OUT INTEGER,

fileFormat OUT VARCHAR2,

contentFormat OUT VARCHAR2,

compressionFormat OUT VARCHAR2,

contentLength OUT INTEGER);

Description

Reads the image BFILE data to get the values of the media attributes for supported formats, and then stores them in the input CLOB and returns them as explicit parameters. This method gets the properties for the following attributes of the image data: MIME type, width, height, file format, content format, compression format, and content length. It populates the CLOB with a set of format properties in XML form.

Parameters

imageBfile

The image data represented as a BFILE.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with a set of format properties of the image BFILE data in XML form.

mimeType

The MIME type of the image data.

width

The width of the image in pixels.

height

The height of the image in pixels.

fileFormat

The format of the image data.

contentFormat

The type of image (monochrome, and so forth).

compressionFormat

The compression algorithm used on the image data.

contentLength

The size of the image file on disk, in bytes.

Usage Notes

If a property cannot be extracted from the media source, then the respective parameter is set to NULL.

Pragmas

None.

Exceptions

ORDImageExceptions.NULL_CONTENT

This exception is raised when the imageBfile parameter is NULL.

See Appendix H for more information about this exception.

Examples

Get the property information for known image attributes:

DECLARE
  img_data          BFILE := BFILENAME('IMAGEDIR','testimg.dat');
  img_attrib        CLOB;
  mimeType          VARCHAR2(80);
  width             NUMBER;
  height            NUMBER;
  fileFormat        VARCHAR2(32);
  contentFormat     VARCHAR2(4000);
  compressionFormat VARCHAR2(4000);
  contentLength     NUMBER;
BEGIN
   DBMS_LOB.CREATETEMPORARY(img_attrib, FALSE, DBMS_LOB.CALL);

  ORDSYS.ORDImage.getProperties(img_data, img_attrib, 
         mimeType, width, height, fileFormat, 
         contentFormat, compressionFormat, contentLength);

   DBMS_OUTPUT.put_line('Size of XML Annotations ' ||
                   TO_CHAR(DBMS_LOB.GETLENGTH(img_attrib)));
   DBMS_OUTPUT.put_line('mimeType: ' || mimeType );
   DBMS_OUTPUT.put_line('width: ' || width );
   DBMS_OUTPUT.put_line('height: ' || height );
   DBMS_OUTPUT.put_line('fileFormat: ' || fileFormat );
   DBMS_OUTPUT.put_line('contentFormat: ' || contentFormat );
   DBMS_OUTPUT.put_line('compressionFormat: ' || compressionFormat );
   DBMS_OUTPUT.put_line('contentLength: ' || contentLength );
EXCEPTION
   WHEN OTHERS THEN
   RAISE;
END;
/

getProperties( ) for BLOBs

Format

getProperties(imageBlob IN BLOB,

attributes IN OUT NOCOPY CLOB);

Description

Reads the image BLOB data to get the values of the media attributes for supported formats, and then stores them in the input CLOB. This method populates the CLOB with a set of format properties in XML form.

Parameters

imageBlob

The image data represented as a BLOB.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with a set of format properties of the image BLOB data in XML form.

Usage Notes

None.

Pragmas

None.

Exceptions

ORDImageExceptions.NULL_CONTENT

This exception is raised when the imageBlob parameter is NULL.

See Appendix H for more information about this exception.

Examples

Get the property information for known image attributes:

DECLARE
  img_attrib CLOB;
  img_data BLOB;
BEGIN
   SELECT img, attributes INTO img_data, img_attrib FROM timg WHERE N = 1 FOR UPDATE;
   ORDSYS.ORDImage.getProperties(img_data, img_attrib);

   DBMS_OUTPUT.put_line('Size of XML Annotations ' ||
                   TO_CHAR(DBMS_LOB.GETLENGTH(img_attrib)));
   UPDATE timg SET img=img_data, attributes=img_attrib WHERE N=1;
   COMMIT;
EXCEPTION
   WHEN OTHERS THEN
   RAISE;
END;
/

getProperties( ) (all attributes) for BLOBs

Format

getProperties(imageBlob IN BLOB,

attributes IN OUT NOCOPY CLOB,

mimeType OUT VARCHAR2,

width OUT INTEGER,

height OUT INTEGER,

fileFormat OUT VARCHAR2,

contentFormat OUT VARCHAR2,

compressionFormat OUT VARCHAR2,

contentLength OUT INTEGER);

Description

Reads the image BLOB data to get the values of the media attributes for supported formats, and then stores them in the input CLOB and returns them as explicit parameters. This method gets the properties for the following attributes of the image data: MIME type, width, height, file format, content format, compression format, and content length. It populates the CLOB with a set of format properties in XML form.

Parameters

imageBlob

The image data represented as a BLOB.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with a set of format properties of the image BLOB data in XML form.

mimeType

The MIME type of the image data.

width

The width of the image in pixels.

height

The height of the image in pixels.

fileFormat

The format of the image data.

contentFormat

The type of image (monochrome, and so forth).

compressionFormat

The compression algorithm used on the image data.

contentLength

The size of the image file on disk, in bytes.

Usage Notes

If a property cannot be extracted from the media source, then the respective parameter is set to NULL.

Pragmas

None.

Exceptions

ORDImageExceptions.NULL_CONTENT

This exception is raised when the imageBlob parameter is NULL.

See Appendix H for more information about this exception.

Examples

Get the property information for known image attributes:

DECLARE
  img_data              BLOB;
  img_attrib        CLOB;
  mimeType          VARCHAR2(4000);
  width             NUMBER;
  height            NUMBER;
  fileFormat        VARCHAR2(32);
  contentFormat     VARCHAR2(4000);
  compressionFormat VARCHAR2(4000);
  contentLength     NUMBER;
BEGIN
   SELECT img, attributes, mimetype, width, height, fileformat, contentformat,
     compressionformat, contentlength INTO img_data, img_attrib, mimeType, width,
     height, fileFormat, contentFormat, compressionFormat, contentLength 
     FROM timg WHERE N = 1 FOR UPDATE;

  ORDSYS.ORDImage.getProperties(img_data, img_attrib, 
         mimeType, width, height, fileFormat,
         contentFormat, compressionFormat, contentLength);

   DBMS_OUTPUT.put_line('Size of XML Annotations ' ||
                   TO_CHAR(DBMS_LOB.GETLENGTH(img_attrib)));
   DBMS_OUTPUT.put_line('mimeType: ' || mimeType );
   DBMS_OUTPUT.put_line('width: ' || width );
   DBMS_OUTPUT.put_line('height: ' || height );
   DBMS_OUTPUT.put_line('fileFormat: ' || fileFormat );
   DBMS_OUTPUT.put_line('contentFormat: ' || contentFormat );
   DBMS_OUTPUT.put_line('compressionFormat: ' || compressionFormat );
   DBMS_OUTPUT.put_line('contentLength: ' || contentLength );
   UPDATE timg SET 
       img=img_data, 
       attributes=img_attrib, 
       mimetype=mimeType, 
       width=width, 
       height=height, 
       fileformat=fileFormat, 
       contentformat=contentFormat, 
       compressionformat=compressionFormat, 
       contentlength=contentLength 
    WHERE N=1;
   COMMIT;
EXCEPTION
   WHEN OTHERS THEN
   RAISE;
END;
/

process( )

Format

process(imageBlob IN OUT NOCOPY BLOB,

command IN VARCHAR2);

Description

Performs one or more image processing operations on a BLOB, writing the image back onto itself.

Parameters

imageBlob

The image data represented as a BLOB.

command

A list of image processing operations to perform on the image.

Usage Notes

You can change one or more of the image attributes shown in Table 5-1. Table 5-2 shows additional changes that can be made only to raw pixel and foreign images.

See Appendix D for more information about process( ) operators.

The process( ) method changes image attributes, therefore if you are storing image attributes, you should call the getProperties( ) method after calling the process( ) method.

Pragmas

None.

Exceptions

ORDImageExceptions.DATA_NOT_LOCAL

This exception is raised if you call the process( ) method and the imageBlob parameter is not initialized.

See Appendix H for more information about this exception.

Examples

Example 1:

Change the image in the image_data BLOB to use higher quality JPEG compression and double the length of the image along the X-axis:

ORDSYS.ORDImage.process(
image_data,'compressionFormat=JPEG,compressionQuality=MAXCOMPRATIO, xScale="2.0"');

Note:

Changing the length on only one axis (for example, xScale=2.0) does not affect the length on the other axis, and would result in image distortion. Also, only the xScale and yScale parameters can be combined in a single scale operation. Any other combinations of scale operators result in an error.

Example 2:

Create at most a 32-by-32 pixel thumbnail image, preserving the original aspect ratio. The maxScale and fixedScale operators are especially useful for creating thumbnail images from various-sized originals:

ORDSYS.ORDImage.process(image_data, 'maxScale=32 32');

Example 3:

Convert the image to TIFF:

DECLARE
img_attrib CLOB;  
image_data BLOB;
BEGIN
   SELECT img, attributes INTO image_data, img_attrib FROM timg 
     WHERE N = 1 FOR UPDATE;
   ORDSYS.ORDImage.process(image_data, 'fileFormat=TIFF');
   ORDSYS.ORDImage.getProperties(image_data, img_attrib);
   UPDATE timg SET img = image_data, attributes=img_attrib WHERE N = 1;
   COMMIT;
EXCEPTION
   WHEN OTHERS THEN
   RAISE;
END;
/

processCopy( ) for BFILEs

Format

processCopy(imageBfile IN OUT NOCOPY BFILE,

command IN VARCHAR2,

dest IN OUT NOCOPY BLOB);

Description

Copies an image stored internally or externally to another image stored internally in the source.localData attribute (of the embedded ORDSource object) and performs one or more image processing operations on the copy.

Parameters

imageBfile

The image data represented as a BFILE.

command

A list of image processing changes to make for the image in the new copy.

dest

The destination of the new image.

Usage Notes

See Table 5-1 and Table 5-2 for information about image processing operators.

Calling this method processes the image into the destination BLOB from any source BFILE.

The processCopy( ) method changes image attributes, therefore, if you are storing image attributes, you should call the getProperties( ) method on the destination image after calling the processCopy( ) method.

See Appendix D for more information about processCopy( ) operators.

Pragmas

None.

Exceptions

ORDImageExceptions.NULL_DESTINATION

This exception is raised if you call the processCopy( ) method and the destination image is NULL.

ORDImageExceptions.NULL_LOCAL_DATA

This exception is raised when the imageBfile parameter is NULL.

See Appendix H for more information about these exceptions.

Examples

Copy an image, generating a thumbnail image of, at most, 32 x 32 pixels in the destination image:

DECLARE
  dest_attrib      CLOB;
  image_data       BFILE := BFILENAME('IMAGEDIR','testimg.dat');
  destination_data BLOB;
  the_Command      VARCHAR2(4000);
BEGIN
   SELECT img, attributes INTO destination_data, dest_attrib FROM timg 
       WHERE N = 2 FOR UPDATE;

   the_Command := 'maxScale=32 32';
   ORDSYS.ORDImage.processCopy(image_data, the_Command, destination_data);
   ORDSYS.ORDImage.getProperties(destination_data, dest_attrib);
   UPDATE timg SET img = destination_data, attributes=dest_attrib WHERE N = 2;
   COMMIT;
EXCEPTION
   WHEN OTHERS THEN
   RAISE;
END;
/

processCopy( ) for BLOBs

Format

processCopy(imageBlob IN BLOB,

command IN VARCHAR2,

dest IN OUT NOCOPY BLOB);

Description

Copies an image stored internally or externally to another image stored internally in the source.localData attribute (of the embedded ORDSource object) and performs one or more image processing operations on the copy.

Parameters

imageBlob

The source image data represented as a BLOB.

command

A list of image processing changes to make for the image in the new copy.

dest

The destination of the new image.

Usage Notes

See Table 5-1 and Table 5-2 for information about image processing operators.

Because temporary LOBs do not have read consistency, you cannot use the same temporary LOB for both the imageBlob and dest parameters.

Calling this method processes the image into the destination BLOB from any source BLOB.

The processCopy( ) method changes image attributes, therefore, if you are storing image attributes, you should call the getProperties( ) method on the destination image after calling the processCopy( ) method.

See Appendix D for more information about processCopy( ) operators.

Pragmas

None.

Exceptions

ORDImageExceptions.DATA_NOT_LOCAL

This exception is raised if you call the processCopy( ) method and the imageBlob parameter is not initialized.

See Appendix H for more information about this exception.

Examples

Copy an image, changing the file format, compression format, and content format in the destination image:

DECLARE
  dest_attrib      CLOB;
  image_data       BLOB;
  destination_data BLOB;
  the_Command      VARCHAR2(4000);
BEGIN
   SELECT img INTO image_data FROM timg WHERE N = 1;
   SELECT img, attributes INTO destination_data, dest_attrib FROM timg 
      WHERE N = 2 FOR UPDATE;

   the_Command := 'fileFormat=tiff, compressionFormat=packbits, contentFormat=8bitlut';
   ORDSYS.ORDImage.processCopy(image_data, the_Command, destination_data);
   ORDSYS.ORDImage.getProperties(destination_data, dest_attrib);
   UPDATE timg SET img = destination_data, attributes=dest_attrib WHERE N = 2;
   COMMIT;
EXCEPTION
   WHEN OTHERS THEN
   RAISE;
END;
/

putMetadata( ) for BFILEs

Format

putMetadata(imageBfile IN NOCOPY BFILE,

dest IN OUT NOCOPY BLOB

xmlData IN NOCOPY XMLType,

metadataType IN VARCHAR2 DEFAULT 'XMP',

encoding IN VARCHAR2 DEFAULT "UTF-8");

Description

Accepts a BFILE containing an image and a schema valid XML document, and creates a binary packet suitable for embedding in the target image file format. The packet is encoded according to the value of the encoding parameter. If the value of the metadataType parameter is XMP, a new XMP packet is written to the image, replacing any existing XMP packets. The new image file with embedded metadata is returned in the dest parameter.

Parameters

imageBfile

The BFILE handle to the image.

dest

The BLOB to receive the image containing the embedded metadata.

xmlData

The XMLtype that contains a schema valid XML document for the indicated metadataType. If the value of the metadataType parameter is XMP, the root element should contain a well-formed RDF document.

metadataType

A string that specifies the type of metadata to write. The valid value is XMP; it is also the default.

encoding

The character encoding to be used in the image file. Valid values are UTF-8, UTF-16, UTF-16BE, and UTF-16LE. The default is UTF-8.

Usage Notes

The binary metadata packet generated from the same xmlData input may have different sizes for different encodings. Different image file formats support different encodings, and may restrict the binary metadata packet size. The following are the restrictions of the supported image formats:

See Oracle Multimedia User's Guide for more information about the metadata feature.

Pragmas

None.

Exceptions

ORDImageExceptions.NULL_CONTENT

This exception is raised when the image is NULL.

ORDImageExceptions.NULL_DESTINATION

This exception is raised when the destination image is NULL.

See Appendix H for more information about these exceptions.

Examples

DECLARE
  imageBfile        BFILE := BFILENAME('MEDIA_DIR','keyboard.jpg');
  dest              BLOB;
  xmlData           XMLType;
BEGIN
  SELECT ad_photo 
  INTO dest 
  FROM pm.print_media
  WHERE product_id = 3106 FOR UPDATE; 
 
  xmlData := xmltype(
          '<xmpMetadata xmlns="http://xmlns.oracle.com/ord/meta/xmp">' ||
          '<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"' ||
          '  xmlns:dc="http://purl.org/dc/elements/1.1/">' ||
          '<rdf:Description>' ||
          '  <dc:rights>' ||
          '    <rdf:Alt>' ||
          '      <rdf:li xml:lang="en-us">' ||
          '        Oracle Corporation' ||
          '      </rdf:li>' ||
          '    </rdf:Alt>'||
          '  </dc:rights>' ||
          '</rdf:Description>' ||
          '</rdf:RDF>' ||
          '</xmpMetadata>', 'http://xmlns.oracle.com/ord/meta/xmp'); 
 
  ORDSYS.ORDImage.putMetadata(imageBfile, dest, xmlData, 'xmp', 'utf-8'); 
 
  UPDATE pm.print_media 
  SET ad_photo = dest 
  WHERE product_id = 3106;
  COMMIT;
 
  EXCEPTION
    WHEN ORDSYS.ORDImageExceptions.NULL_CONTENT THEN
      DBMS_OUTPUT.PUT_LINE('image source is null');
    WHEN ORDSYS.ORDImageExceptions.NULL_DESTINATION THEN
      DBMS_OUTPUT.PUT_LINE('image destionation is null');
    WHEN OTHERS THEN
    RAISE;
END;/

putMetadata( ) for BLOBs

Format

putMetadata(imageBlob IN NOCOPY BLOB,

dest IN OUT NOCOPY BLOB

xmlData IN NOCOPY XMLType,

metadataType IN VARCHAR2 DEFAULT 'XMP',

encoding IN VARCHAR2 DEFAULT "UTF-8");

Description

Accepts a BLOB containing an image and a schema valid XML document, and creates a binary packet suitable for embedding in the target image file format. The packet is encoded according to the value of the encoding parameter. If the value of the metadataType parameter is XMP, a new XMP packet is written to the image, replacing any existing XMP packets. The new image file with embedded metadata is returned in the dest parameter.

Parameters

imageBlob

The BLOB handle to the image.

dest

The BLOB to receive the image containing the embedded metadata.

xmlData

The XMLtype that contains a schema valid XML document for the indicated metadataType. If the value of the metadataType parameter is XMP, the root element should contain a well-formed RDF document.

metadataType

A string that specifies the type of metadata to write. The valid value is XMP; it is also the default.

encoding

The character encoding to be used in the image file. Valid values are UTF-8, UTF-16, UTF-16BE, and UTF-16LE. The default is UTF-8.

Usage Notes

Because temporary LOBs do not have read consistency, you cannot use one temporary LOB for both the imageBlob and dest parameters. The binary metadata packet generated from the same xmlData input may have different sizes for different encodings. Different image file formats support different encodings, and may restrict the binary metadata packet size. The following are the restrictions of the supported image formats:

See Oracle Multimedia User's Guide for more information about the metadata feature.

Pragmas

None.

Exceptions

ORDImageExceptions.NULL_CONTENT

This exception is raised when the image is NULL.

ORDImageExceptions.NULL_DESTINATION

This exception is raised when the destination image is NULL.

See Appendix H for more information about these exceptions.

Examples

DECLARE
  imageBlob        BLOB;
  tmp              BLOB;
  xmlData          XMLType;
  ctx              RAW(64):=NULL;
BEGIN
  SELECT ad_photo
  INTO imageBlob 
  FROM pm.print_media
  WHERE product_id = 3106 FOR UPDATE; 
 
  xmlData := xmltype(
          '<xmpMetadata xmlns="http://xmlns.oracle.com/ord/meta/xmp">' ||
          '<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"' ||
          '  xmlns:dc="http://purl.org/dc/elements/1.1/">' ||
          '<rdf:Description>' ||
          '  <dc:rights>' ||
          '    <rdf:Alt>' ||
          '      <rdf:li xml:lang="en-us">' ||
          '        Oracle Corporation' ||
          '      </rdf:li>' ||
          '    </rdf:Alt>'||
          '  </dc:rights>' ||
          '</rdf:Description>' ||
          '</rdf:RDF>' ||
          '</xmpMetadata>', 'http://xmlns.oracle.com/ord/meta/xmp'); 
 
  tmp := imageBlob;
  ORDSYS.ORDImage.putMetadata(tmp, imageBlob, xmlData, 'xmp', 'utf-8'); 
 
  UPDATE pm.print_media 
  SET ad_photo = imageBlob 
  WHERE product_id = 3106;
  COMMIT; 
 
  EXCEPTION
    WHEN ORDSYS.ORDImageExceptions.NULL_CONTENT THEN
      DBMS_OUTPUT.PUT_LINE('image source is null');
    WHEN ORDSYS.ORDImageExceptions.NULL_DESTINATION THEN
      DBMS_OUTPUT.PUT_LINE('image destionation is null');
    WHEN OTHERS THEN
      RAISE;
END;/

Static Methods Unique to the ORDVideo Object Type Relational Interface

This section presents reference information on the Oracle Multimedia static methods unique to the ORDVideo relational interface.

The relational interface adds Oracle Multimedia support to video data stored in BLOBs and BFILEs rather than in the ORDVideo object type. The static methods unique to the ORDVideo relational interface are defined in the ordvspec.sql file.

Example Video Table Definition

The methods described in this section show examples based on a test video table TVID. Refer to the TVID table definition that follows when reading through the examples:

TVID Table Definition

CREATE TABLE tvid(n NUMBER, 
                  vid BLOB,
                  attributes CLOB,
                  mimetype VARCHAR2(4000),
                  format VARCHAR2(31),
                  width INTEGER,
                  height INTEGER,
                  frameresolution INTEGER,
                  framerate INTEGER,
                  videoduration INTEGER,
                  numberofframes INTEGER,
                  compressiontype VARCHAR2(4000),
                  numberofcolors INTEGER,
                  bitrate INTEGER)
LOB(vid) STORE AS SECUREFILE;

INSERT INTO tvid VALUES(1, EMPTY_BLOB(), EMPTY_CLOB(), NULL, NULL, NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
INSERT INTO tvid VALUES(2, EMPTY_BLOB(), EMPTY_CLOB(), NULL, NULL, NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL);
COMMIT;

getProperties( ) for BFILEs

Format

getProperties(ctx IN OUT RAW,

videoBfile IN OUT NOCOPY BFILE,

attributes IN OUT NOCOPY CLOB,

format IN VARCHAR2);

Description

Reads the video BFILE data to get the values of the media attributes for supported formats, and then stores them in the input CLOB. This method populates the CLOB with an extensive set of format and application properties in XML form.

Parameters

ctx

The format plug-in context information.

videoBfile

The video data represented as a BFILE.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with an extensive set of format and application properties of the video BFILE data in XML form.

format

The format of the video data. If a non-NULL value is specified, then the format plug-in for this format type is invoked.

Usage Notes

None.

Pragmas

None.

Exceptions

ORDSourceExceptions.EMPTY_SOURCE

This exception is raised when the value of the source.local attribute is 1 or 0 (TRUE), but the value of the source.localData attribute is NULL.

ORDVideoExceptions.VIDEO_PLUGIN_EXCEPTION

This exception is raised if you call the getProperties( ) method and the video plug-in raises an exception.

See Appendix H for more information about these exceptions.

Examples

Get the property information for known video attributes:

DECLARE
  vid_attrib CLOB;
  ctx RAW(64) :=NULL;
  vid_data BFILE := BFILENAME('VIDEODIR','testvid.dat');
  vid_format VARCHAR2(160) := NULL;
BEGIN
  DBMS_LOB.CREATETEMPORARY(vid_attrib, FALSE, DBMS_LOB.CALL);
  ORDSYS.ORDVideo.getProperties(ctx, vid_data, vid_attrib, vid_format);

  DBMS_OUTPUT.put_line('Size of XML Annotations ' ||
                   TO_CHAR(DBMS_LOB.GETLENGTH(vid_attrib)));
EXCEPTION
  WHEN OTHERS THEN
  RAISE;
END;
/

getProperties( ) (all attributes) for BFILEs

Format

getProperties(ctx IN OUT RAW,

videoBfile IN OUT NOCOPY BFILE,

attributes IN OUT NOCOPY CLOB,

mimeType OUT VARCHAR2,

format IN OUT VARCHAR2,

width OUT INTEGER,

height OUT INTEGER,

frameResolution OUT INTEGER,

frameRate OUT INTEGER,

videoDuration OUT INTEGER,

numberOfFrames OUT INTEGER,

compressionType OUT VARCHAR2,

numberOfColors OUT INTEGER,

bitRate OUT INTEGER);

Description

Reads the video BFILE data to get the values of the media attributes for supported formats, and then stores them in the input CLOB and returns them as explicit parameters. This method gets the properties for the following attributes of the video data: MIME type, format, frame size, frame resolution, frame rate, video duration, number of frames, compression type, number of colors, and bit rate. It populates the CLOB with an extensive set of format and application properties in XML form.

Parameters

ctx

The format plug-in context information.

videoBfile

The video data represented as a BFILE.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with an extensive set of format and application properties of the video BFILE data in XML form.

mimeType

The MIME type of the video data.

format

The format of the video data. If a non-NULL value is specified, then the format plug-in for this format type is invoked. If specified as NULL, the format of the video data is returned.

width

The width of the frame in pixels of the video data.

height

The height of the frame in pixels of the video data.

frameResolution

The number of pixels per inch of frames in the video data.

frameRate

The number of frames per second at which the video data was recorded.

videoDuration

The total time required to play the video data.

numberOfFrames

The total number of frames in the video data.

compressionType

The compression type of the video data.

numberOfColors

The number of colors in the video data.

bitRate

The bit rate in the video data.

Usage Notes

If a property cannot be extracted from the media source, then the respective parameter is set to NULL.

Pragmas

None.

Exceptions

ORDSourceExceptions.EMPTY_SOURCE

This exception is raised when the value of the source.local attribute is 1 or 0 (TRUE), but the value of the source.localData attribute is NULL.

ORDVideoExceptions.VIDEO_PLUGIN_EXCEPTION

This exception is raised if you call the getProperties( ) method and the video plug-in raises an exception.

See Appendix H for more information about these exceptions.

Examples

Get the property information for known video attributes:

DECLARE
  vid_attrib        CLOB;
  ctx               RAW(64) :=NULL;
  vid_data          BFILE := BFILENAME('VIDEODIR','testvid.dat');
  mimeType          VARCHAR2(80);
  format            VARCHAR2(32) := NULL;
  width             NUMBER;
  height            NUMBER;
  frameResolution   NUMBER;
  frameRate         NUMBER;
  videoDuration     NUMBER;
  numberOfFrames    NUMBER;
  compressionType   VARCHAR2(160);
  numberOfColors    NUMBER;
  bitRate           NUMBER;
BEGIN
  DBMS_LOB.CREATETEMPORARY(vid_attrib, FALSE, DBMS_LOB.CALL);

  ORDSYS.ORDVideo.getProperties(ctx, vid_data, vid_attrib, mimeType, format, 
          width, height, frameResolution, frameRate,
          videoDuration, numberOfFrames, compressionType, numberOfColors, bitRate);

  DBMS_OUTPUT.put_line('Size of XML Annotations ' ||
                   TO_CHAR(DBMS_LOB.GETLENGTH(vid_attrib)));
  DBMS_OUTPUT.put_line('mimeType: ' || mimeType );
  DBMS_OUTPUT.put_line('format: ' || format );
  DBMS_OUTPUT.put_line('width: ' || width );
  DBMS_OUTPUT.put_line('height: ' || height );
  DBMS_OUTPUT.put_line('frameResolution: ' || frameResolution );
  DBMS_OUTPUT.put_line('frameRate: ' || frameRate );
  DBMS_OUTPUT.put_line('videoDuration: ' || videoDuration );
  DBMS_OUTPUT.put_line('numberOfFrames: ' || numberOfFrames );
  DBMS_OUTPUT.put_line('compressionType: ' || compressionType );
  DBMS_OUTPUT.put_line('numberOfColors: ' || numberOfColors );
  DBMS_OUTPUT.put_line('bitRate: ' || bitRate );
EXCEPTION
  WHEN OTHERS THEN
  RAISE;
END;
/

getProperties( ) for BLOBs

Format

getProperties(ctx IN OUT RAW,

videoBlob IN BLOB,

attributes IN OUT NOCOPY CLOB,

format IN VARCHAR2);

Description

Reads the video BLOB data to get the values of the media attributes for supported formats, and then stores them in the input CLOB. This method populates the CLOB with an extensive set of format and application properties in XML form.

Parameters

ctx

The format plug-in context information.

videoBlob

The video data represented as a BLOB.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with an extensive set of format and application properties of the video BLOB data in XML form.

format

The format of the video data. If a non-NULL value is specified, then the format plug-in for this format type is invoked.

Usage Notes

None.

Pragmas

None.

Exceptions

ORDSourceExceptions.EMPTY_SOURCE

This exception is raised when the value of the source.local attribute is 1 or 0 (TRUE), but the value of the source.localData attribute is NULL.

ORDVideoExceptions.VIDEO_PLUGIN_EXCEPTION

This exception is raised if you call the getProperties( ) method and the video plug-in raises an exception.

See Appendix H for more information about these exceptions.

Examples

Get the property information for known video attributes:

DECLARE
  vid_attrib CLOB;
  ctx RAW(64) :=NULL;
  vid_data BLOB;
  vid_format VARCHAR2(31) := NULL;
BEGIN
  SELECT vid, attributes INTO vid_data, vid_attrib FROM tvid WHERE N = 1 FOR UPDATE;
  ORDSYS.ORDVideo.getProperties(ctx, vid_data, vid_attrib, vid_format);

  DBMS_OUTPUT.put_line('Size of XML Annotations ' ||
                   TO_CHAR(DBMS_LOB.GETLENGTH(vid_attrib)));
  UPDATE tvid SET vid=vid_data, attributes=vid_attrib WHERE N=1;
  COMMIT;
EXCEPTION
  WHEN OTHERS THEN
  RAISE;
END;
/

getProperties( ) (all attributes) for BLOBs

Format

getProperties(ctx IN OUT RAW,

videoBlob IN BLOB,

attributes IN OUT NOCOPY CLOB,

mimeType OUT VARCHAR2,

format IN OUT VARCHAR2

width OUT INTEGER,

height OUT INTEGER,

frameResolution OUT INTEGER,

frameRate OUT INTEGER,

videoDuration OUT INTEGER,

numberOfFrames OUT INTEGER,

compressionType OUT VARCHAR2,

numberOfColors OUT INTEGER,

bitRate OUT INTEGER);

Description

Reads the video BLOB data to get the values of the media attributes for supported formats, and then stores them in the input CLOB and returns them as explicit parameters. This method gets the properties for the following attributes of the video data: MIME type, format, frame size, frame resolution, frame rate, video duration, number of frames, compression type, number of colors, and bit rate. It populates the CLOB with an extensive set of format and application properties in XML form.

Parameters

ctx

The format plug-in context information.

videoBlob

The video data represented as a BLOB.

attributes

The CLOB to hold the XML attribute information generated by the getProperties( ) method. This CLOB is populated with an extensive set of format and application properties of the video BLOB data in XML form.

mimeType

The MIME type of the video data.

format

The format of the video data. If a non-NULL value is specified, then the format plug-in for this format type is invoked. If specified as NULL, the format of the video data is returned.

width

The width of the frame in pixels of the video data.

height

The height of the frame in pixels of the video data.

frameResolution

The number of pixels per inch of frames in the video data.

frameRate

The number of frames per second at which the video data was recorded.

videoDuration

The total time required to play the video data.

numberOfFrames

The total number of frames in the video data.

compressionType

The compression type of the video data.

numberOfColors

The number of colors in the video data.

bitRate

The bit rate in the video data.

Usage Notes

If a property cannot be extracted from the media source, then the respective parameter is set to NULL.

Pragmas

None.

Exceptions

ORDSourceExceptions.EMPTY_SOURCE

This exception is raised when the value of the source.local attribute is 1 or 0 (TRUE), but the value of the source.localData attribute is NULL.

ORDVideoExceptions.VIDEO_PLUGIN_EXCEPTION

This exception is raised if you call the getProperties( ) method and the video plug-in raises an exception.

See Appendix H for more information about these exceptions.

Examples

Get the property information for known video attributes:

DECLARE
  vid_attrib        CLOB;
  ctx               RAW(64) :=NULL;
  vid_data          BLOB;
  mimeType          VARCHAR2(80);
  format            VARCHAR2(32);
  width             NUMBER;
  height            NUMBER;
  frameResolution   NUMBER;
  frameRate         NUMBER;
  videoDuration     NUMBER;
  numberOfFrames    NUMBER;
  compressionType   VARCHAR2(160);
  numberOfColors    NUMBER;
  bitRate           NUMBER;
BEGIN
  SELECT vid, attributes, mimetype, format, width, height, frameresolution, framerate,
         videoduration, numberofframes, compressiontype, numberofcolors, bitrate INTO
         vid_data, vid_attrib, mimeType, format, width, height, frameResolution,
         frameRate, videoDuration, numberOfFrames, compressionType, numberOfColors,
         bitRate FROM tvid WHERE N = 1 FOR UPDATE;

  ORDSYS.ORDVideo.getProperties(ctx, vid_data, vid_attrib, mimeType, format, 
          width, height, frameResolution, frameRate,
          videoDuration, numberOfFrames, compressionType, numberOfColors, bitRate);

  DBMS_OUTPUT.put_line('Size of XML Annotations ' ||
                   TO_CHAR(DBMS_LOB.GETLENGTH(vid_attrib)));
  DBMS_OUTPUT.put_line('mimeType: ' || mimeType );
  DBMS_OUTPUT.put_line('format: ' || format );
  DBMS_OUTPUT.put_line('width: ' || width );
  DBMS_OUTPUT.put_line('height: ' || height );
  DBMS_OUTPUT.put_line('frameResolution: ' || frameResolution );
  DBMS_OUTPUT.put_line('frameRate: ' || frameRate );
  DBMS_OUTPUT.put_line('videoDuration: ' || videoDuration );
  DBMS_OUTPUT.put_line('numberOfFrames: ' || numberOfFrames );
  DBMS_OUTPUT.put_line('compressionType: ' || compressionType );
  DBMS_OUTPUT.put_line('numberOfColors: ' || numberOfColors );
  DBMS_OUTPUT.put_line('bitRate: ' || bitRate );
  UPDATE tvid SET 
        vid=vid_data, 
        attributes=vid_attrib, 
        mimetype=mimeType, 
        format=format, 
        width=width, 
        height=height, 
        frameresolution=frameResolution, 
        framerate=frameRate, 
        videoduration=videoDuration, 
        numberofframes=numberOfFrames, 
        compressiontype=compressionType, 
        numberofcolors=numberOfColors, 
        bitrate=bitRate 
     WHERE N=1;
  COMMIT;
EXCEPTION
  WHEN OTHERS THEN
  RAISE;
END;
/