@ -9,6 +9,8 @@
import java.awt.* ;
import java.io.* ;
import java.lang.reflect.* ;
import java.util.* ;
import java.util.List ; // disambiguation
import javax.media.* ;
import javax.media.control.* ;
@ -35,6 +37,18 @@ public class DataSource
* /
private static final Logger logger = Logger . getLogger ( DataSource . class ) ;
/ * *
* The default width of < tt > DataSource < / tt > when the associated
* < tt > QTCaptureDevice < / tt > does not report the actual width .
* /
static final int DEFAULT_WIDTH = 640 ;
/ * *
* The default height of < tt > DataSource < / tt > when the associated
* < tt > QTCaptureDevice < / tt > does not report the actual height .
* /
static final int DEFAULT_HEIGHT = 480 ;
/ * *
* The < tt > QTCaptureSession < / tt > which captures from { @link # device } and
* pushes media data to the < tt > PushBufferStream < / tt > s of this
@ -48,6 +62,12 @@ public class DataSource
* /
private QTCaptureDevice device ;
/ * *
* The list of < tt > Format < / tt > s to be reported by < tt > DataSource < / tt >
* instances as supported formats .
* /
private static Format [ ] supportedFormats ;
/ * *
* Initializes a new < tt > DataSource < / tt > instance .
* /
@ -255,6 +275,111 @@ protected Format getFormat(int streamIndex, Format oldValue)
return format ;
}
/ * *
* Gets the < tt > Format < / tt > s which are to be reported by a
* < tt > FormatControl < / tt > as supported formats for a
* < tt > PushBufferStream < / tt > at a specific zero - based index in the list of
* streams of this < tt > PushBufferDataSource < / tt > .
*
* @param streamIndex the zero - based index of the < tt > PushBufferStream < / tt >
* for which the specified < tt > FormatControl < / tt > is to report the list of
* supported < tt > Format < / tt > s
* @return an array of < tt > Format < / tt > s to be reported by a
* < tt > FormatControl < / tt > as the supported formats for the
* < tt > PushBufferStream < / tt > at the specified < tt > streamIndex < / tt > in the
* list of streams of this < tt > PushBufferDataSource < / tt >
* @see AbstractPushBufferCaptureDevice # getSupportedFormats ( int )
* /
@Override
protected Format [ ] getSupportedFormats ( int streamIndex )
{
return getSupportedFormats ( super . getSupportedFormats ( streamIndex ) ) ;
}
/ * *
* Gets a list of < tt > Format < / tt > s which are more specific than given
* < tt > Format < / tt > s with respect to video size . The implementation tries to
* come up with sane video sizes ( for example , by looking for codecs which
* accept the encodings of the specified generic < tt > Format < / tt > s and using
* their sizes if any ) .
*
* @param genericFormats the < tt > Format < / tt > s from which more specific are
* to be derived
* @return a list of < tt > Format < / tt > s which are more specific than the given
* < tt > Format < / tt > s with respect to video size
* /
private static synchronized Format [ ] getSupportedFormats (
Format [ ] genericFormats )
{
if ( ( supportedFormats ! = null ) & & ( supportedFormats . length > 0 ) )
return supportedFormats . clone ( ) ;
List < Format > specificFormats = new LinkedList < Format > ( ) ;
for ( Format genericFormat : genericFormats )
{
VideoFormat genericVideoFormat = ( VideoFormat ) genericFormat ;
if ( genericVideoFormat . getSize ( ) = = null )
{
// specificFormats
// .add(
// genericFormat
// .intersects(
// new VideoFormat(
// null,
// new Dimension(
// DEFAULT_WIDTH,
// DEFAULT_HEIGHT),
// Format.NOT_SPECIFIED,
// null,
// Format.NOT_SPECIFIED)));
@SuppressWarnings ( "unchecked" )
Vector < String > codecs
= PlugInManager
. getPlugInList (
new VideoFormat ( genericVideoFormat . getEncoding ( ) ) ,
null ,
PlugInManager . CODEC ) ;
for ( String codec : codecs )
{
Format [ ] supportedInputFormats
= PlugInManager
. getSupportedInputFormats (
codec ,
PlugInManager . CODEC ) ;
for ( Format supportedInputFormat : supportedInputFormats )
if ( supportedInputFormat instanceof VideoFormat )
{
Dimension size
= ( ( VideoFormat ) supportedInputFormat )
. getSize ( ) ;
if ( size ! = null )
specificFormats
. add (
genericFormat
. intersects (
new VideoFormat (
null ,
size ,
Format . NOT_SPECIFIED ,
null ,
Format . NOT_SPECIFIED ) ) ) ;
}
}
}
specificFormats . add ( genericFormat ) ;
}
supportedFormats
= specificFormats . toArray ( new Format [ specificFormats . size ( ) ] ) ;
return supportedFormats . clone ( ) ;
}
/ * *
* Sets the < tt > QTCaptureDevice < / tt > which represents the media source of
* this < tt > DataSource < / tt > .
Lyubomir Marinov
16 years ago