/*
* @(#)YUVFormat.java 1.21 02/08/21
*
* Copyright (c) 1996-2002 Sun Microsystems, Inc. All rights reserved.
*/
package javax.media.format;
import java.awt.Dimension;
import javax.media.Format;
/**
* Describes YUV image data.
* @since JMF 2.0
*/
public class YUVFormat extends VideoFormat {
/** YUV Planar 4:1:1 type. */
public static final int YUV_411 = 1;
/** YUV Planar 4:2:0 type. */
public static final int YUV_420 = 2;
/** YUV Planar 4:2:2 type. */
public static final int YUV_422 = 4;
/** YUV Planar 1:1:1 type. */
public static final int YUV_111 = 8;
/**
* YUV Planar YVU9 type. Contains a Y value for
* every pixel and U and V values for every 4x4 block of pixels.
*/
public static final int YUV_YVU9 = 16;
/**
* YUV 4:2:2 interleaved format. The components are ordered as
* specified by the offsetY, offsetU and offsetV attributes.
* For example, if the ordering is Y, V, Y and U, the offsets would
* be offsetY=0;offsetU=3;offsetV=1. The position of the second Y is implied.
* Y pixel stride is assumed to be 2 and the U and V pixel strides are assumed
* to be 4.
*/
public static final int YUV_YUYV = 32;
/**
* When added to the yuvType, specifies that the chrominance values
* are signed.
*/
public static final int YUV_SIGNED = 64;
/* 512 taken for YVU9 from Indeo 3.2 decoder */
/** The YUV format type */
protected int yuvType = NOT_SPECIFIED;
/** Length of a row of Y values. Would be >= width of the frame. */
protected int strideY = NOT_SPECIFIED;
/** Length of a row of U or V values. */
protected int strideUV = NOT_SPECIFIED;
/**
* When the YUV data is in planar format, specifies the offset into
* the data for the Y plane. This value is ignored in the interleaved
* formats.
*/
protected int offsetY= NOT_SPECIFIED;
/**
* When the YUV data is in planar format, specifies the offset into
* the data for the U plane. This value is ignored in the interleaved
* formats.
*/
protected int offsetU = NOT_SPECIFIED;
/**
* When the YUV data is in planar format, specifies the offset into
* the data for the V plane. This value is ignored in the interleaved
* formats.
*/
protected int offsetV = NOT_SPECIFIED;
// The encoding string for YUV.
private static String ENCODING = VideoFormat.YUV;
/**
* Constructs a <CODE>YUVFormat</CODE> object that represents all YUV formats.
*/
public YUVFormat() {
super(ENCODING);
}
/**
* Constructs a <CODE>YUVFormat</CODE> object for a specific <CODE>yuvType</CODE>.
* @param yuvType The YUV type for this <CODE>YUVFormat</CODE>: YUV_411, YUV_420,
* YUV_422, YUV_111, YUV_YVU9, or YUV_YUYV.
*/
public YUVFormat(int yuvType) {
super(ENCODING);
this.yuvType = yuvType;
}
/**
* Constructs a <CODE>YUVFormat</CODE> with the specified properties. Use this
* constructor for interleaved YUV formats (YUV_YUYV).
* @param size A <CODE>Dimension</CODE> that specifies the frame size.
* @param maxDataLength The maximum size of the data array.
* @param dataType The type of the data.
* @param yuvType The YUV ordering type.
* @param strideY The number of data elements between the first Y
* component in a row and the first Y component in the next row.
*/
// public YUVFormat(Dimension size, int maxDataLength,
// Class dataType,
// int yuvType, int strideY) {
// // Call VideoFormat constructor
// super(ENCODING, size, maxDataLength, dataType);
// // Set YUV properties.
// this.yuvType = yuvType;
// this.strideY = strideY;
// this.strideUV = strideY;
// this.offsetY = 0;
// this.offsetU = 0;
// this.offsetV = 0;
// }
/**
* Constructs a <CODE>YUVFormat</CODE> with the specified properties. Use this
* constructor for planar YUV formats. (YUV_411, YUV_420,
* YUV_422, YUV_111, or YUV_YVU9.)
* @param size A <CODE>Dimension</CODE> that specifies the frame size.
* @param maxDataLength The maximum size of the data array.
* @param dataType The type of the data.
* @param yuvType The YUV ordering type.
* @param strideY The number of data elements between the first Y
* component in a row and the first Y component in the next row.
* @param strideUV The number of data elements between the first U
* component in a row and the first U component in the next row. The
* same value is expected for the V component.
* @param offsetY The offset into the data array where the Y plane
* begins.
* @param offsetU The offset into the data array where the U plane
* begins.
* @param offsetV The offset into the data array where the V plane
* begins.
*/
public YUVFormat(Dimension size, int maxDataLength,
Class dataType,
float frameRate,
int yuvType, int strideY, int strideUV,
int offsetY, int offsetU, int offsetV) {
// Call VideoFormat constructor
super(ENCODING, size, maxDataLength, dataType, frameRate);
// Set YUV properties.
this.yuvType = yuvType;
this.strideY = strideY;
this.strideUV = strideUV;
this.offsetY = offsetY;
this.offsetU = offsetU;
this.offsetV = offsetV;
}
/**
* Gets the YUV data format.
* @return The YUV type: YUV_411, YUV_420,
* YUV_422, YUV_111, YUV_YVU9, or YUV_YUYV.
*/
public int getYuvType() {
return yuvType;
}
/**
* Gets the Y stride--the length of a row of Y values.
* @return An integer representing the Y stride.
*/
public int getStrideY() {
return strideY;
}
/**
* Gets the UV stride--the length of a row of U or V values.
* @return An integer representing the UV stride.
*/
public int getStrideUV() {
return strideUV;
}
/**
* Gets the Y offset--the position in the data where the Y values begin.
* @return An integer representing the Y offset.
*/
public int getOffsetY() {
return offsetY;
}
/**
* Gets the U offset--the position in the data where the U values begin.
* @return An integer representing the U offset.
*/
public int getOffsetU() {
return offsetU;
}
/**
* Gets the V offset--the position in the data where the V values begin.
* @return An integer representing the V offset.
*/
public int getOffsetV() {
return offsetV;
}
/**
* Creates a clone of this <CODE>YUVFormat</CODE>.
* @return A clone of this <CODE>YUVFormat</CODE>.
*/
public Object clone() {
YUVFormat f = new YUVFormat(size,
maxDataLength,
dataType,
frameRate,
yuvType,
strideY,
strideUV,
offsetY,
offsetU,
offsetV);
f.copy(this);
return f;
}
/**
* Copies the attributes from the specified <CODE>Format</CODE> into
* this <CODE>YUVFormat</CODE>.
* @param f The <CODE>Format</CODE> to copy the attributes from.
*/
protected void copy(Format f) {
super.copy(f);
if (f instanceof YUVFormat) {
YUVFormat other = (YUVFormat) f;
yuvType = other.yuvType;
strideY = other.strideY;
strideUV = other.strideUV;
offsetY = other.offsetY;
offsetU = other.offsetU;
offsetV = other.offsetV;
}
}
/**
* Compares the specified <CODE>Format</CODE> with this <code>YUVFormat</code>.
* Returns <CODE>true</CODE> only if the specified <CODE>Format</CODE>
* is a <CODE>YUVFormat</CODE> object and all of
* its attributes are identical to
* the attributes in this <code>YUVFormat</code>.
* @param format The <CODE>Format</CODE> to compare.
* @return true if the specified <CODE>Format</CODE> is the same as this one.
*/
public boolean equals(Object format) {
if (format instanceof YUVFormat) {
YUVFormat other = (YUVFormat) format;
return super.equals(format) &&
yuvType == other.yuvType &&
strideY == other.strideY &&
strideUV == other.strideUV &&
offsetY == other.offsetY &&
offsetU == other.offsetU &&
offsetV == other.offsetV;
} else
return false;
}
/**
* Checks whether or not the specified <CODE>Format</CODE> <EM>matches</EM>
* this <CODE>YUVFormat</CODE>.
* Matches only compares the attributes that are defined in the specified
* <CODE>Format</CODE>,
* unspecified attributes are ignored.
* <p>
* The two <CODE>Format</CODE> objects do not have to be of the same class
* to match. For example, if "A" are "B" are being compared, a
* match is possible if "A" is derived from "B"
* or "B" is derived from "A". (The compared attributes must still match,
* or <CODE>matches</CODE> fails.)
* @param format The <CODE>Format</CODE> to compare with this one.
* @return <CODE>true</CODE> if the specified <CODE>Format</CODE>
* matches this one, <CODE>false</CODE> if it does not.
*/
public boolean matches(Format format) {
if (!super.matches(format))
return false;
if (!(format instanceof YUVFormat))
return true;
YUVFormat other = (YUVFormat) format;
return
(yuvType == NOT_SPECIFIED || other.yuvType == NOT_SPECIFIED ||
yuvType == other.yuvType) &&
(strideY == NOT_SPECIFIED || other.strideY == NOT_SPECIFIED ||
strideY == other.strideY) &&
(strideUV == NOT_SPECIFIED || other.strideUV == NOT_SPECIFIED ||
strideUV == other.strideUV) &&
(offsetY == NOT_SPECIFIED || other.offsetY == NOT_SPECIFIED ||
offsetY == other.offsetY) &&
(offsetU == NOT_SPECIFIED || other.offsetU == NOT_SPECIFIED ||
offsetU == other.offsetU) &&
(offsetV == NOT_SPECIFIED || other.offsetV == NOT_SPECIFIED ||
offsetV == other.offsetV);
}
/**
* Finds the attributes shared by two matching <CODE>Format</CODE> objects.
* If the specified <CODE>Format</CODE> does not match this one, the result
* is undefined.
* @param The matching <CODE>Format</CODE> to intersect with this
* <CODE>YUVFormat</CODE>.
* @return A <CODE>Format</CODE> object
* with its attributes set to those attributes common to both
* <CODE>Format</CODE> objects.
* @see #matches
*/
public Format intersects(Format format) {
Format fmt;
if ((fmt = super.intersects(format)) == null)
return null;
if (!(format instanceof YUVFormat))
return fmt;
YUVFormat other = (YUVFormat)format;
YUVFormat res = (YUVFormat)fmt;
res.yuvType = (yuvType != NOT_SPECIFIED ?
yuvType : other.yuvType);
res.strideY = (strideY != NOT_SPECIFIED ?
strideY : other.strideY);
res.strideUV = (strideUV != NOT_SPECIFIED ?
strideUV : other.strideUV);
res.offsetY = (offsetY != NOT_SPECIFIED ?
offsetY : other.offsetY);
res.offsetU = (offsetU != NOT_SPECIFIED ?
offsetU : other.offsetU);
res.offsetV = (offsetV != NOT_SPECIFIED ?
offsetV : other.offsetV);
return res;
}
/**
* Generate a format that's less restrictive than this format but
* contains the basic attributes that will make this resulting format
* useful for format matching.
* @return A <CODE>Format</CODE> that's less restrictive than the
* this format.
*/
public Format relax() {
YUVFormat fmt;
if ((fmt = (YUVFormat)super.relax()) == null)
return null;
fmt.strideY = NOT_SPECIFIED;
fmt.strideUV = NOT_SPECIFIED;
fmt.offsetY = NOT_SPECIFIED;
fmt.offsetU = NOT_SPECIFIED;
fmt.offsetV = NOT_SPECIFIED;
return fmt;
}
/**
* Gets a <CODE>String</CODE> representation of the attributes of this
* <CODE>YUVFormat</CODE>. For example: "YUV Video Format, 352x240, ...".
* @return A <CODE>String</CODE> that describes the format attributes.
*/
public String toString() {
return "YUV Video Format: Size = " + size +
" MaxDataLength = " + maxDataLength + " DataType = " + dataType +
" yuvType = " + yuvType + " StrideY = " + strideY +
" StrideUV = " + strideUV +
" OffsetY = " + offsetY +
" OffsetU = " + offsetU + " OffsetV = " + offsetV + "\n";
}
}
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