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Freedom for Media in Java
package com.sun.media.vfw;
import java.awt.*;
import javax.media.format.*;
import com.sun.media.format.*;
/**
*
* @author Ken Larson
*
*/
public class BitMapInfo
{
public int biWidth;
public int biHeight;
public int biPlanes;
public int biBitCount;
public String fourcc;
public int biSizeImage;
public int biXPelsPerMeter;
public int biYPelsPerMeter;
public int biClrUsed;
public int biClrImportant;
public int extraSize;
public byte[] extraBytes;
public BitMapInfo()
{
this.fourcc = "";
this.biPlanes = 1;
this.biBitCount = 24;
}
public BitMapInfo(String fourcc, int width, int height)
{
this.fourcc = fourcc;
this.biPlanes = 1;
this.biBitCount = 24;
this.biWidth = width;
this.biHeight = height;
if (fourcc.equals("RGB"))
{
this.biSizeImage = biWidth * biHeight * (biBitCount / 8);
}
}
public BitMapInfo(String fourcc, int width, int height, int planes,
int bitcount, int sizeImage, int clrused, int clrimportant)
{
this.fourcc = fourcc;
this.biPlanes = planes;
this.biBitCount = bitcount;
this.biWidth = width;
this.biHeight = height;
this.biSizeImage = sizeImage;
this.biClrUsed = clrused;
this.biClrImportant = clrimportant;
}
public BitMapInfo(VideoFormat format)
{
if (format instanceof RGBFormat)
{
final RGBFormat fCast = (RGBFormat) format;
this.fourcc = fCast.getEncoding().toUpperCase();
this.biPlanes = 1;
this.biBitCount = fCast.getBitsPerPixel();
if (fCast.getSize() == null)
{
this.biWidth = 320;
this.biHeight = 240;
} else
{
this.biWidth = fCast.getSize().width;
this.biHeight = fCast.getSize().height;
}
if (biBitCount == -1)
this.biSizeImage = -2;
else
this.biSizeImage = biWidth * biHeight * (biBitCount / 8);
this.biClrUsed = 0;
this.biClrImportant = 0;
} else if (format instanceof AviVideoFormat)
{
final AviVideoFormat fCast = (AviVideoFormat) format;
this.fourcc = fCast.getEncoding();
this.biPlanes = fCast.getPlanes();
this.biBitCount = fCast.getBitsPerPixel();
this.biWidth = fCast.getSize().width;
this.biHeight = fCast.getSize().height;
this.biSizeImage = fCast.getImageSize();
this.biClrUsed = fCast.getClrUsed();
this.biClrImportant = fCast.getClrImportant();
} else if (format instanceof YUVFormat)
{
final YUVFormat fCast = (YUVFormat) format;
if (fCast.getYuvType() == YUVFormat.YUV_420)
{
this.fourcc = "YV12";
this.biBitCount = 12;
} else
{
this.fourcc = format.getEncoding();
this.biBitCount = 24;
}
// TODO: what if size is set?
this.biWidth = 320;
this.biHeight = 240;
this.biPlanes = 1;
this.biSizeImage = -1;
} else
{
this.fourcc = format.getEncoding();
this.biBitCount = 24;
// TODO: what if size is set?
this.biWidth = 320;
this.biHeight = 240;
this.biPlanes = 1;
this.biSizeImage = -1;
}
}
public VideoFormat createVideoFormat(Class arrayType)
{
return createVideoFormat(arrayType, -1.f);
}
public VideoFormat createVideoFormat(Class arrayType, float frameRate)
{
if (fourcc.equals("RGB"))
{
final int red, green, blue;
final int pixelStride;
final int lineStride;
final int maxDataLength;
// TODO: this was determined by black-box testing, so we may have
// missed some cases.
if (biBitCount == 32)
{
if (arrayType == int[].class)
{
red = 0xFF0000;
green = 0xFF00;
blue = 0xFF;
} else
{
red = 3;
green = 2;
blue = 1;
}
} else if (biBitCount == 24)
{
red = 3;
green = 2;
blue = 1;
} else if (biBitCount == 16)
{
red = 31744;
green = 992;
blue = 31;
} else
{
red = green = blue = -1;
}
if (arrayType == int[].class)
{
pixelStride = biBitCount / 32;
maxDataLength = biSizeImage / 4;
} else if (arrayType == byte[].class)
{
pixelStride = biBitCount / 8;
maxDataLength = biSizeImage;
} else if (arrayType == short[].class)
{
pixelStride = biBitCount / 16;
maxDataLength = biSizeImage / 2;
} else
{
pixelStride = 0;
maxDataLength = 0;
throw new IllegalArgumentException();
}
lineStride = pixelStride * biWidth;
// TODO: other biBitCount values?
return new RGBFormat(new Dimension(biWidth, biHeight),
maxDataLength, arrayType, frameRate, biBitCount, red,
green, blue, pixelStride, lineStride, 1, // flipped,
1 // endian
);
} else if (fourcc.equals("YV12"))
{
return new YUVFormat(new Dimension(biWidth, biHeight), biSizeImage,
byte[].class, frameRate, YUVFormat.YUV_420, biWidth, // stride
// y
biWidth / 2, // stride uv
0, // offset y
biWidth * biHeight + (biWidth * biHeight) / 4, // offset u
biWidth * biHeight // offset v
);
} else if (fourcc.equals("I420"))
{
return new YUVFormat(new Dimension(biWidth, biHeight), biSizeImage,
byte[].class, frameRate, YUVFormat.YUV_420, biWidth, // stride
// y
biWidth / 2, // stride uv
0, // offset y
// u/v offsts swapped from YV12: (empirically determined)
biWidth * biHeight, // offset u
biWidth * biHeight + (biWidth * biHeight) / 4 // offset v
);
} else
{
return new AviVideoFormat(fourcc, new Dimension(biWidth, biHeight),
biSizeImage, arrayType, frameRate, biPlanes, biBitCount,
biSizeImage, biXPelsPerMeter, biYPelsPerMeter, biClrUsed,
biClrImportant, extraBytes);
}
}
@Override
public String toString()
{
return "Size = " + biWidth + " x " + biHeight + " Planes = " + biPlanes
+ " BitCount = " + biBitCount + " FourCC = " + fourcc
+ " SizeImage = " + biSizeImage + "\nClrUsed = " + biClrUsed
+ "\nClrImportant = " + biClrImportant + "\nExtraSize = "
+ extraSize + "\n";
}
}