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clean up, added the deps to the repo since the version matters

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library/deps/libjpeg-turbo/java/org/libjpegturbo/turbojpeg/TJ.java Normal file
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/*
* Copyright (C)2011 D. R. Commander. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the libjpeg-turbo Project nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.libjpegturbo.turbojpeg;
/**
* TurboJPEG utility class (cannot be instantiated)
*/
final public class TJ {
/**
* The number of chrominance subsampling options
*/
final public static int NUMSAMP = 5;
/**
* 4:4:4 chrominance subsampling (no chrominance subsampling). The JPEG
* or YUV image will contain one chrominance component for every pixel in the
* source image.
*/
final public static int SAMP_444 = 0;
/**
* 4:2:2 chrominance subsampling. The JPEG or YUV image will contain one
* chrominance component for every 2x1 block of pixels in the source image.
*/
final public static int SAMP_422 = 1;
/**
* 4:2:0 chrominance subsampling. The JPEG or YUV image will contain one
* chrominance component for every 2x2 block of pixels in the source image.
*/
final public static int SAMP_420 = 2;
/**
* Grayscale. The JPEG or YUV image will contain no chrominance components.
*/
final public static int SAMP_GRAY = 3;
/**
* 4:4:0 chrominance subsampling. The JPEG or YUV image will contain one
* chrominance component for every 1x2 block of pixels in the source image.
*/
final public static int SAMP_440 = 4;
/**
* Returns the MCU block width for the given level of chrominance
* subsampling.
*
* @param subsamp the level of chrominance subsampling (one of
* <code>SAMP_*</code>)
*
* @return the MCU block width for the given level of chrominance subsampling
*/
public static int getMCUWidth(int subsamp) throws Exception {
if(subsamp < 0 || subsamp >= NUMSAMP)
throw new Exception("Invalid subsampling type");
return mcuWidth[subsamp];
}
final private static int mcuWidth[] = {
8, 16, 16, 8, 8
};
/**
* Returns the MCU block height for the given level of chrominance
* subsampling.
*
* @param subsamp the level of chrominance subsampling (one of
* <code>SAMP_*</code>)
*
* @return the MCU block height for the given level of chrominance
* subsampling
*/
public static int getMCUHeight(int subsamp) throws Exception {
if(subsamp < 0 || subsamp >= NUMSAMP)
throw new Exception("Invalid subsampling type");
return mcuHeight[subsamp];
}
final private static int mcuHeight[] = {
8, 8, 16, 8, 16
};
/**
* The number of pixel formats
*/
final public static int NUMPF = 11;
/**
* RGB pixel format. The red, green, and blue components in the image are
* stored in 3-byte pixels in the order R, G, B from lowest to highest byte
* address within each pixel.
*/
final public static int PF_RGB = 0;
/**
* BGR pixel format. The red, green, and blue components in the image are
* stored in 3-byte pixels in the order B, G, R from lowest to highest byte
* address within each pixel.
*/
final public static int PF_BGR = 1;
/**
* RGBX pixel format. The red, green, and blue components in the image are
* stored in 4-byte pixels in the order R, G, B from lowest to highest byte
* address within each pixel. The X component is ignored when compressing
* and undefined when decompressing.
*/
final public static int PF_RGBX = 2;
/**
* BGRX pixel format. The red, green, and blue components in the image are
* stored in 4-byte pixels in the order B, G, R from lowest to highest byte
* address within each pixel. The X component is ignored when compressing
* and undefined when decompressing.
*/
final public static int PF_BGRX = 3;
/**
* XBGR pixel format. The red, green, and blue components in the image are
* stored in 4-byte pixels in the order R, G, B from highest to lowest byte
* address within each pixel. The X component is ignored when compressing
* and undefined when decompressing.
*/
final public static int PF_XBGR = 4;
/**
* XRGB pixel format. The red, green, and blue components in the image are
* stored in 4-byte pixels in the order B, G, R from highest to lowest byte
* address within each pixel. The X component is ignored when compressing
* and undefined when decompressing.
*/
final public static int PF_XRGB = 5;
/**
* Grayscale pixel format. Each 1-byte pixel represents a luminance
* (brightness) level from 0 to 255.
*/
final public static int PF_GRAY = 6;
/**
* RGBA pixel format. This is the same as {@link #PF_RGBX}, except that when
* decompressing, the X byte is guaranteed to be 0xFF, which can be
* interpreted as an opaque alpha channel.
*/
final public static int PF_RGBA = 7;
/**
* BGRA pixel format. This is the same as {@link #PF_BGRX}, except that when
* decompressing, the X byte is guaranteed to be 0xFF, which can be
* interpreted as an opaque alpha channel.
*/
final public static int PF_BGRA = 8;
/**
* ABGR pixel format. This is the same as {@link #PF_XBGR}, except that when
* decompressing, the X byte is guaranteed to be 0xFF, which can be
* interpreted as an opaque alpha channel.
*/
final public static int PF_ABGR = 9;
/**
* ARGB pixel format. This is the same as {@link #PF_XRGB}, except that when
* decompressing, the X byte is guaranteed to be 0xFF, which can be
* interpreted as an opaque alpha channel.
*/
final public static int PF_ARGB = 10;
/**
* Returns the pixel size (in bytes) of the given pixel format.
*
* @param pixelFormat the pixel format (one of <code>PF_*</code>)
*
* @return the pixel size (in bytes) of the given pixel format
*/
public static int getPixelSize(int pixelFormat) throws Exception {
if(pixelFormat < 0 || pixelFormat >= NUMPF)
throw new Exception("Invalid pixel format");
return pixelSize[pixelFormat];
}
final private static int pixelSize[] = {
3, 3, 4, 4, 4, 4, 1, 4, 4, 4, 4
};
/**
* For the given pixel format, returns the number of bytes that the red
* component is offset from the start of the pixel. For instance, if a pixel
* of format <code>TJ.PF_BGRX</code> is stored in <code>char pixel[]</code>,
* then the red component will be
* <code>pixel[TJ.getRedOffset(TJ.PF_BGRX)]</code>.
*
* @param pixelFormat the pixel format (one of <code>PF_*</code>)
*
* @return the red offset for the given pixel format
*/
public static int getRedOffset(int pixelFormat) throws Exception {
if(pixelFormat < 0 || pixelFormat >= NUMPF)
throw new Exception("Invalid pixel format");
return redOffset[pixelFormat];
}
final private static int redOffset[] = {
0, 2, 0, 2, 3, 1, 0, 0, 2, 3, 1
};
/**
* For the given pixel format, returns the number of bytes that the green
* component is offset from the start of the pixel. For instance, if a pixel
* of format <code>TJ.PF_BGRX</code> is stored in <code>char pixel[]</code>,
* then the green component will be
* <code>pixel[TJ.getGreenOffset(TJ.PF_BGRX)]</code>.
*
* @param pixelFormat the pixel format (one of <code>PF_*</code>)
*
* @return the green offset for the given pixel format
*/
public static int getGreenOffset(int pixelFormat) throws Exception {
if(pixelFormat < 0 || pixelFormat >= NUMPF)
throw new Exception("Invalid pixel format");
return greenOffset[pixelFormat];
}
final private static int greenOffset[] = {
1, 1, 1, 1, 2, 2, 0, 1, 1, 2, 2
};
/**
* For the given pixel format, returns the number of bytes that the blue
* component is offset from the start of the pixel. For instance, if a pixel
* of format <code>TJ.PF_BGRX</code> is stored in <code>char pixel[]</code>,
* then the blue component will be
* <code>pixel[TJ.getBlueOffset(TJ.PF_BGRX)]</code>.
*
* @param pixelFormat the pixel format (one of <code>PF_*</code>)
*
* @return the blue offset for the given pixel format
*/
public static int getBlueOffset(int pixelFormat) throws Exception {
if(pixelFormat < 0 || pixelFormat >= NUMPF)
throw new Exception("Invalid pixel format");
return blueOffset[pixelFormat];
}
final private static int blueOffset[] = {
2, 0, 2, 0, 1, 3, 0, 2, 0, 1, 3
};
/**
* The uncompressed source/destination image is stored in bottom-up (Windows,
* OpenGL) order, not top-down (X11) order.
*/
final public static int FLAG_BOTTOMUP = 2;
/**
* Turn off CPU auto-detection and force TurboJPEG to use MMX code
* (IPP and 32-bit libjpeg-turbo versions only.)
*/
final public static int FLAG_FORCEMMX = 8;
/**
* Turn off CPU auto-detection and force TurboJPEG to use SSE code
* (32-bit IPP and 32-bit libjpeg-turbo versions only.)
*/
final public static int FLAG_FORCESSE = 16;
/**
* Turn off CPU auto-detection and force TurboJPEG to use SSE2 code
* (32-bit IPP and 32-bit libjpeg-turbo versions only.)
*/
final public static int FLAG_FORCESSE2 = 32;
/**
* Turn off CPU auto-detection and force TurboJPEG to use SSE3 code
*(64-bit IPP version only.)
*/
final public static int FLAG_FORCESSE3 = 128;
/**
* Use fast, inaccurate chrominance upsampling routines in the JPEG
* decompressor (libjpeg and libjpeg-turbo versions only.)
*/
final public static int FLAG_FASTUPSAMPLE = 256;
/**
* Returns the maximum size of the buffer (in bytes) required to hold a JPEG
* image with the given width and height, and level of chrominance
* subsampling.
*
* @param width the width (in pixels) of the JPEG image
*
* @param height the height (in pixels) of the JPEG image
*
* @param jpegSubsamp the level of chrominance subsampling to be used when
* generating the JPEG image (one of {@link TJ TJ.SAMP_*})
*
* @return the maximum size of the buffer (in bytes) required to hold a JPEG
* image with the given width and height, and level of chrominance
* subsampling
*/
public native static int bufSize(int width, int height, int jpegSubsamp)
throws Exception;
/**
* Returns the size of the buffer (in bytes) required to hold a YUV planar
* image with the given width, height, and level of chrominance subsampling.
*
* @param width the width (in pixels) of the YUV image
*
* @param height the height (in pixels) of the YUV image
*
* @param subsamp the level of chrominance subsampling used in the YUV
* image (one of {@link TJ TJ.SAMP_*})
*
* @return the size of the buffer (in bytes) required to hold a YUV planar
* image with the given width, height, and level of chrominance subsampling
*/
public native static int bufSizeYUV(int width, int height,
int subsamp)
throws Exception;
/**
* Returns a list of fractional scaling factors that the JPEG decompressor in
* this implementation of TurboJPEG supports.
*
* @return a list of fractional scaling factors that the JPEG decompressor in
* this implementation of TurboJPEG supports
*/
public native static TJScalingFactor[] getScalingFactors()
throws Exception;
static {
TJLoader.load();
}
};

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/*
* Copyright (C)2011 D. R. Commander. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the libjpeg-turbo Project nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.libjpegturbo.turbojpeg;
import java.awt.image.*;
import java.nio.*;
/**
* TurboJPEG compressor
*/
public class TJCompressor {
private final static String NO_ASSOC_ERROR =
"No source image is associated with this instance";
/**
* Create a TurboJPEG compressor instance.
*/
public TJCompressor() throws Exception {
init();
}
/**
* Create a TurboJPEG compressor instance and associate the uncompressed
* source image stored in <code>srcImage</code> with the newly-created
* instance.
*
* @param srcImage see {@link #setSourceImage} for description
*
* @param width see {@link #setSourceImage} for description
*
* @param pitch see {@link #setSourceImage} for description
*
* @param height see {@link #setSourceImage} for description
*
* @param pixelFormat see {@link #setSourceImage} for description
*/
public TJCompressor(byte[] srcImage, int width, int pitch, int height,
int pixelFormat) throws Exception {
setSourceImage(srcImage, width, pitch, height, pixelFormat);
}
/**
* Associate an uncompressed source image with this compressor instance.
*
* @param srcImage image buffer containing RGB or grayscale pixels to be
* compressed
*
* @param width width (in pixels) of the source image
*
* @param pitch bytes per line of the source image. Normally, this should be
* <code>width * TJ.pixelSize(pixelFormat)</code> if the source image is
* unpadded, but you can use this parameter to, for instance, specify that
* the scanlines in the source image are padded to 4-byte boundaries, as is
* the case for Windows bitmaps. You can also be clever and use this
* parameter to skip lines, etc. Setting this parameter to 0 is the
* equivalent of setting it to <code>width *
* TJ.pixelSize(pixelFormat)</code>.
*
* @param height height (in pixels) of the source image
*
* @param pixelFormat pixel format of the source image (one of
* {@link TJ TJ.PF_*})
*/
public void setSourceImage(byte[] srcImage, int width, int pitch,
int height, int pixelFormat) throws Exception {
if(handle == 0) init();
if(srcImage == null || width < 1 || height < 1 || pitch < 0
|| pixelFormat < 0 || pixelFormat >= TJ.NUMPF)
throw new Exception("Invalid argument in setSourceImage()");
srcBuf = srcImage;
srcWidth = width;
if(pitch == 0) srcPitch = width * TJ.getPixelSize(pixelFormat);
else srcPitch = pitch;
srcHeight = height;
srcPixelFormat = pixelFormat;
}
/**
* Set the level of chrominance subsampling for subsequent compress/encode
* operations.
*
* @param newSubsamp the new level of chrominance subsampling (one of
* {@link TJ TJ.SAMP_*})
*/
public void setSubsamp(int newSubsamp) throws Exception {
if(newSubsamp < 0 || newSubsamp >= TJ.NUMSAMP)
throw new Exception("Invalid argument in setSubsamp()");
subsamp = newSubsamp;
}
/**
* Set the JPEG image quality level for subsequent compress operations.
*
* @param quality the new JPEG image quality level (1 to 100, 1 = worst,
* 100 = best)
*/
public void setJPEGQuality(int quality) throws Exception {
if(quality < 1 || quality > 100)
throw new Exception("Invalid argument in setJPEGQuality()");
jpegQuality = quality;
}
/**
* Compress the uncompressed source image associated with this compressor
* instance and output a JPEG image to the given destination buffer.
*
* @param dstBuf buffer that will receive the JPEG image. Use
* {@link TJ#bufSize} to determine the maximum size for this buffer based on
* the image width and height.
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*/
public void compress(byte[] dstBuf, int flags) throws Exception {
if(dstBuf == null || flags < 0)
throw new Exception("Invalid argument in compress()");
if(srcBuf == null) throw new Exception(NO_ASSOC_ERROR);
if(jpegQuality < 0) throw new Exception("JPEG Quality not set");
if(subsamp < 0) throw new Exception("Subsampling level not set");
compressedSize = compress(srcBuf, srcWidth, srcPitch,
srcHeight, srcPixelFormat, dstBuf, subsamp, jpegQuality, flags);
}
/**
* Compress the uncompressed source image associated with this compressor
* instance and return a buffer containing a JPEG image.
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*
* @return a buffer containing a JPEG image. The length of this buffer will
* not be equal to the size of the JPEG image. Use {@link
* #getCompressedSize} to obtain the size of the JPEG image.
*/
public byte[] compress(int flags) throws Exception {
if(srcWidth < 1 || srcHeight < 1)
throw new Exception(NO_ASSOC_ERROR);
byte[] buf = new byte[TJ.bufSize(srcWidth, srcHeight, subsamp)];
compress(buf, flags);
return buf;
}
/**
* Compress the uncompressed source image stored in <code>srcImage</code>
* and output a JPEG image to the given destination buffer.
*
* @param srcImage a <code>BufferedImage</code> instance containing RGB or
* grayscale pixels to be compressed
*
* @param dstBuf buffer that will receive the JPEG image. Use
* {@link TJ#bufSize} to determine the maximum size for this buffer based on
* the image width and height.
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*/
public void compress(BufferedImage srcImage, byte[] dstBuf, int flags)
throws Exception {
if(srcImage == null || dstBuf == null || flags < 0)
throw new Exception("Invalid argument in compress()");
int width = srcImage.getWidth();
int height = srcImage.getHeight();
int pixelFormat; boolean intPixels = false;
if(byteOrder == null)
byteOrder = ByteOrder.nativeOrder();
switch(srcImage.getType()) {
case BufferedImage.TYPE_3BYTE_BGR:
pixelFormat = TJ.PF_BGR; break;
case BufferedImage.TYPE_4BYTE_ABGR:
case BufferedImage.TYPE_4BYTE_ABGR_PRE:
pixelFormat = TJ.PF_XBGR; break;
case BufferedImage.TYPE_BYTE_GRAY:
pixelFormat = TJ.PF_GRAY; break;
case BufferedImage.TYPE_INT_BGR:
if(byteOrder == ByteOrder.BIG_ENDIAN)
pixelFormat = TJ.PF_XBGR;
else
pixelFormat = TJ.PF_RGBX;
intPixels = true; break;
case BufferedImage.TYPE_INT_RGB:
case BufferedImage.TYPE_INT_ARGB:
case BufferedImage.TYPE_INT_ARGB_PRE:
if(byteOrder == ByteOrder.BIG_ENDIAN)
pixelFormat = TJ.PF_XRGB;
else
pixelFormat = TJ.PF_BGRX;
intPixels = true; break;
default:
throw new Exception("Unsupported BufferedImage format");
}
WritableRaster wr = srcImage.getRaster();
if(jpegQuality < 0) throw new Exception("JPEG Quality not set");
if(subsamp < 0) throw new Exception("Subsampling level not set");
if(intPixels) {
SinglePixelPackedSampleModel sm =
(SinglePixelPackedSampleModel)srcImage.getSampleModel();
int pitch = sm.getScanlineStride();
DataBufferInt db = (DataBufferInt)wr.getDataBuffer();
int[] buf = db.getData();
compressedSize = compress(buf, width, pitch, height, pixelFormat, dstBuf,
subsamp, jpegQuality, flags);
}
else {
ComponentSampleModel sm =
(ComponentSampleModel)srcImage.getSampleModel();
int pixelSize = sm.getPixelStride();
if(pixelSize != TJ.getPixelSize(pixelFormat))
throw new Exception("Inconsistency between pixel format and pixel size in BufferedImage");
int pitch = sm.getScanlineStride();
DataBufferByte db = (DataBufferByte)wr.getDataBuffer();
byte[] buf = db.getData();
compressedSize = compress(buf, width, pitch, height, pixelFormat, dstBuf,
subsamp, jpegQuality, flags);
}
}
/**
* Compress the uncompressed source image stored in <code>srcImage</code>
* and return a buffer containing a JPEG image.
*
* @param srcImage a <code>BufferedImage</code> instance containing RGB or
* grayscale pixels to be compressed
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*
* @return a buffer containing a JPEG image. The length of this buffer will
* not be equal to the size of the JPEG image. Use {@link
* #getCompressedSize} to obtain the size of the JPEG image.
*/
public byte[] compress(BufferedImage srcImage, int flags) throws Exception {
int width = srcImage.getWidth();
int height = srcImage.getHeight();
byte[] buf = new byte[TJ.bufSize(width, height, subsamp)];
compress(srcImage, buf, flags);
return buf;
}
/**
* Encode the uncompressed source image associated with this compressor
* instance and output a YUV planar image to the given destination buffer.
* This method uses the accelerated color conversion routines in
* TurboJPEG's underlying codec to produce a planar YUV image that is
* suitable for direct video display. Specifically, if the chrominance
* components are subsampled along the horizontal dimension, then the width
* of the luminance plane is padded to 2 in the output image (same goes for
* the height of the luminance plane, if the chrominance components are
* subsampled along the vertical dimension.) Also, each line of each plane
* in the output image is padded to 4 bytes. Although this will work with
* any subsampling option, it is really only useful in combination with
* {@link TJ#SAMP_420}, which produces an image compatible with the I420 (AKA
* "YUV420P") format.
*
* @param dstBuf buffer that will receive the YUV planar image. Use
* {@link TJ#bufSizeYUV} to determine the appropriate size for this buffer
* based on the image width, height, and level of chrominance subsampling.
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*/
public void encodeYUV(byte[] dstBuf, int flags) throws Exception {
if(dstBuf == null || flags < 0)
throw new Exception("Invalid argument in compress()");
if(srcBuf == null) throw new Exception(NO_ASSOC_ERROR);
if(subsamp < 0) throw new Exception("Subsampling level not set");
encodeYUV(srcBuf, srcWidth, srcPitch, srcHeight,
srcPixelFormat, dstBuf, subsamp, flags);
compressedSize = TJ.bufSizeYUV(srcWidth, srcHeight, subsamp);
}
/**
* Encode the uncompressed source image associated with this compressor
* instance and return a buffer containing a YUV planar image. See
* {@link #encodeYUV(byte[], int)} for more detail.
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*
* @return a buffer containing a YUV planar image
*/
public byte[] encodeYUV(int flags) throws Exception {
if(srcWidth < 1 || srcHeight < 1)
throw new Exception(NO_ASSOC_ERROR);
if(subsamp < 0) throw new Exception("Subsampling level not set");
byte[] buf = new byte[TJ.bufSizeYUV(srcWidth, srcHeight, subsamp)];
encodeYUV(buf, flags);
return buf;
}
/**
* Encode the uncompressed source image stored in <code>srcImage</code>
* and output a YUV planar image to the given destination buffer. See
* {@link #encodeYUV(byte[], int)} for more detail.
*
* @param srcImage a <code>BufferedImage</code> instance containing RGB or
* grayscale pixels to be encoded
*
* @param dstBuf buffer that will receive the YUV planar image. Use
* {@link TJ#bufSizeYUV} to determine the appropriate size for this buffer
* based on the image width, height, and level of chrominance subsampling.
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*/
public void encodeYUV(BufferedImage srcImage, byte[] dstBuf, int flags)
throws Exception {
if(srcImage == null || dstBuf == null || flags < 0)
throw new Exception("Invalid argument in encodeYUV()");
int width = srcImage.getWidth();
int height = srcImage.getHeight();
int pixelFormat; boolean intPixels = false;
if(byteOrder == null)
byteOrder = ByteOrder.nativeOrder();
switch(srcImage.getType()) {
case BufferedImage.TYPE_3BYTE_BGR:
pixelFormat = TJ.PF_BGR; break;
case BufferedImage.TYPE_4BYTE_ABGR:
case BufferedImage.TYPE_4BYTE_ABGR_PRE:
pixelFormat = TJ.PF_XBGR; break;
case BufferedImage.TYPE_BYTE_GRAY:
pixelFormat = TJ.PF_GRAY; break;
case BufferedImage.TYPE_INT_BGR:
if(byteOrder == ByteOrder.BIG_ENDIAN)
pixelFormat = TJ.PF_XBGR;
else
pixelFormat = TJ.PF_RGBX;
intPixels = true; break;
case BufferedImage.TYPE_INT_RGB:
case BufferedImage.TYPE_INT_ARGB:
case BufferedImage.TYPE_INT_ARGB_PRE:
if(byteOrder == ByteOrder.BIG_ENDIAN)
pixelFormat = TJ.PF_XRGB;
else
pixelFormat = TJ.PF_BGRX;
intPixels = true; break;
default:
throw new Exception("Unsupported BufferedImage format");
}
WritableRaster wr = srcImage.getRaster();
if(subsamp < 0) throw new Exception("Subsampling level not set");
if(intPixels) {
SinglePixelPackedSampleModel sm =
(SinglePixelPackedSampleModel)srcImage.getSampleModel();
int pitch = sm.getScanlineStride();
DataBufferInt db = (DataBufferInt)wr.getDataBuffer();
int[] buf = db.getData();
encodeYUV(buf, width, pitch, height, pixelFormat, dstBuf, subsamp,
flags);
}
else {
ComponentSampleModel sm =
(ComponentSampleModel)srcImage.getSampleModel();
int pixelSize = sm.getPixelStride();
if(pixelSize != TJ.getPixelSize(pixelFormat))
throw new Exception("Inconsistency between pixel format and pixel size in BufferedImage");
int pitch = sm.getScanlineStride();
DataBufferByte db = (DataBufferByte)wr.getDataBuffer();
byte[] buf = db.getData();
encodeYUV(buf, width, pitch, height, pixelFormat, dstBuf, subsamp,
flags);
}
compressedSize = TJ.bufSizeYUV(width, height, subsamp);
}
/**
* Encode the uncompressed source image stored in <code>srcImage</code>
* and return a buffer containing a YUV planar image. See
* {@link #encodeYUV(byte[], int)} for more detail.
*
* @param srcImage a <code>BufferedImage</code> instance containing RGB or
* grayscale pixels to be encoded
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*
* @return a buffer containing a YUV planar image
*/
public byte[] encodeYUV(BufferedImage srcImage, int flags)
throws Exception {
if(subsamp < 0) throw new Exception("Subsampling level not set");
int width = srcImage.getWidth();
int height = srcImage.getHeight();
byte[] buf = new byte[TJ.bufSizeYUV(width, height, subsamp)];
encodeYUV(srcImage, buf, flags);
return buf;
}
/**
* Returns the size of the image (in bytes) generated by the most recent
* compress/encode operation.
*
* @return the size of the image (in bytes) generated by the most recent
* compress/encode operation
*/
public int getCompressedSize() {
return compressedSize;
}
/**
* Free the native structures associated with this compressor instance.
*/
public void close() throws Exception {
destroy();
}
protected void finalize() throws Throwable {
try {
close();
}
catch(Exception e) {}
finally {
super.finalize();
}
};
private native void init() throws Exception;
private native void destroy() throws Exception;
// JPEG size in bytes is returned
private native int compress(byte[] srcBuf, int width, int pitch,
int height, int pixelFormat, byte[] dstbuf, int jpegSubsamp, int jpegQual,
int flags) throws Exception;
private native int compress(int[] srcBuf, int width, int pitch,
int height, int pixelFormat, byte[] dstbuf, int jpegSubsamp, int jpegQual,
int flags) throws Exception;
private native void encodeYUV(byte[] srcBuf, int width, int pitch,
int height, int pixelFormat, byte[] dstbuf, int subsamp, int flags)
throws Exception;
private native void encodeYUV(int[] srcBuf, int width, int pitch,
int height, int pixelFormat, byte[] dstbuf, int subsamp, int flags)
throws Exception;
static {
TJLoader.load();
}
private long handle = 0;
private byte[] srcBuf = null;
private int srcWidth = 0;
private int srcHeight = 0;
private int srcPitch = 0;
private int srcPixelFormat = -1;
private int subsamp = -1;
private int jpegQuality = -1;
private int compressedSize = 0;
private ByteOrder byteOrder = null;
};

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/*
* Copyright (C)2011 D. R. Commander. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the libjpeg-turbo Project nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.libjpegturbo.turbojpeg;
import java.awt.*;
import java.nio.*;
/**
* Custom filter callback interface
*/
public interface TJCustomFilter {
/**
* A callback function that can be used to modify the DCT coefficients after
* they are losslessly transformed but before they are transcoded to a new
* JPEG file. This allows for custom filters or other transformations to be
* applied in the frequency domain.
*
* @param coeffBuffer a buffer containing transformed DCT coefficients.
* (NOTE: this buffer is not guaranteed to be valid once the callback
* returns, so applications wishing to hand off the DCT coefficients to
* another function or library should make a copy of them within the body of
* the callback.)
*
* @param bufferRegion rectangle containing the width and height of
* <code>coeffBuffer</code> as well as its offset relative to the component
* plane. TurboJPEG implementations may choose to split each component plane
* into multiple DCT coefficient buffers and call the callback function once
* for each buffer.
*
* @param planeRegion rectangle containing the width and height of the
* component plane to which <code>coeffBuffer</code> belongs
*
* @param componentID ID number of the component plane to which
* <code>coeffBuffer</code>belongs (Y, Cb, and Cr have, respectively, ID's of
* 0, 1, and 2 in typical JPEG images.)
*
* @param transformID ID number of the transformed image to which
* <code>coeffBuffer</code> belongs. This is the same as the index of the
* transform in the transforms array that was passed to {@link
* TJTransformer#transform TJTransformer.transform()}.
*
* @param transform a {@link TJTransform} instance that specifies the
* parameters and/or cropping region for this transform
*/
public void customFilter(ShortBuffer coeffBuffer, Rectangle bufferRegion,
Rectangle planeRegion, int componentID, int transformID,
TJTransform transform)
throws Exception;
}

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/*
* Copyright (C)2011 D. R. Commander. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the libjpeg-turbo Project nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.libjpegturbo.turbojpeg;
import java.awt.image.*;
import java.nio.*;
/**
* TurboJPEG decompressor
*/
public class TJDecompressor {
private final static String NO_ASSOC_ERROR =
"No JPEG image is associated with this instance";
/**
* Create a TurboJPEG decompresssor instance.
*/
public TJDecompressor() throws Exception {
init();
}
/**
* Create a TurboJPEG decompressor instance and associate the JPEG image
* stored in <code>jpegImage</code> with the newly-created instance.
*
* @param jpegImage JPEG image buffer (size of the JPEG image is assumed to
* be the length of the array)
*/
public TJDecompressor(byte[] jpegImage) throws Exception {
init();
setJPEGImage(jpegImage, jpegImage.length);
}
/**
* Create a TurboJPEG decompressor instance and associate the JPEG image
* of length <code>imageSize</code> bytes stored in <code>jpegImage</code>
* with the newly-created instance.
*
* @param jpegImage JPEG image buffer
*
* @param imageSize size of the JPEG image (in bytes)
*/
public TJDecompressor(byte[] jpegImage, int imageSize) throws Exception {
init();
setJPEGImage(jpegImage, imageSize);
}
/**
* Associate the JPEG image of length <code>imageSize</code> bytes stored in
* <code>jpegImage</code> with this decompressor instance. This image will
* be used as the source image for subsequent decompress operations.
*
* @param jpegImage JPEG image buffer
*
* @param imageSize size of the JPEG image (in bytes)
*/
public void setJPEGImage(byte[] jpegImage, int imageSize) throws Exception {
if(jpegImage == null || imageSize < 1)
throw new Exception("Invalid argument in setJPEGImage()");
jpegBuf = jpegImage;
jpegBufSize = imageSize;
decompressHeader(jpegBuf, jpegBufSize);
}
/**
* Returns the width of the JPEG image associated with this decompressor
* instance.
*
* @return the width of the JPEG image associated with this decompressor
* instance
*/
public int getWidth() throws Exception {
if(jpegWidth < 1) throw new Exception(NO_ASSOC_ERROR);
return jpegWidth;
}
/**
* Returns the height of the JPEG image associated with this decompressor
* instance.
*
* @return the height of the JPEG image associated with this decompressor
* instance
*/
public int getHeight() throws Exception {
if(jpegHeight < 1) throw new Exception(NO_ASSOC_ERROR);
return jpegHeight;
}
/**
* Returns the level of chrominance subsampling used in the JPEG image
* associated with this decompressor instance.
*
* @return the level of chrominance subsampling used in the JPEG image
* associated with this decompressor instance
*/
public int getSubsamp() throws Exception {
if(jpegSubsamp < 0) throw new Exception(NO_ASSOC_ERROR);
if(jpegSubsamp >= TJ.NUMSAMP)
throw new Exception("JPEG header information is invalid");
return jpegSubsamp;
}
/**
* Returns the JPEG image buffer associated with this decompressor instance.
*
* @return the JPEG image buffer associated with this decompressor instance
*/
public byte[] getJPEGBuf() throws Exception {
if(jpegBuf == null) throw new Exception(NO_ASSOC_ERROR);
return jpegBuf;
}
/**
* Returns the size of the JPEG image (in bytes) associated with this
* decompressor instance.
*
* @return the size of the JPEG image (in bytes) associated with this
* decompressor instance
*/
public int getJPEGSize() throws Exception {
if(jpegBufSize < 1) throw new Exception(NO_ASSOC_ERROR);
return jpegBufSize;
}
/**
* Returns the width of the largest scaled down image that the TurboJPEG
* decompressor can generate without exceeding the desired image width and
* height.
*
* @param desiredWidth desired width (in pixels) of the decompressed image.
* Setting this to 0 is the same as setting it to the width of the JPEG image
* (in other words, the width will not be considered when determining the
* scaled image size.)
*
* @param desiredHeight desired height (in pixels) of the decompressed image.
* Setting this to 0 is the same as setting it to the height of the JPEG
* image (in other words, the height will not be considered when determining
* the scaled image size.)
*
* @return the width of the largest scaled down image that the TurboJPEG
* decompressor can generate without exceeding the desired image width and
* height
*/
public int getScaledWidth(int desiredWidth, int desiredHeight)
throws Exception {
if(jpegWidth < 1 || jpegHeight < 1)
throw new Exception(NO_ASSOC_ERROR);
if(desiredWidth < 0 || desiredHeight < 0)
throw new Exception("Invalid argument in getScaledWidth()");
TJScalingFactor sf[] = TJ.getScalingFactors();
if(desiredWidth == 0) desiredWidth = jpegWidth;
if(desiredHeight == 0) desiredHeight = jpegHeight;
int scaledWidth = jpegWidth, scaledHeight = jpegHeight;
for(int i = 0; i < sf.length; i++) {
scaledWidth = sf[i].getScaled(jpegWidth);
scaledHeight = sf[i].getScaled(jpegHeight);
if(scaledWidth <= desiredWidth && scaledHeight <= desiredHeight)
break;
}
if(scaledWidth > desiredWidth || scaledHeight > desiredHeight)
throw new Exception("Could not scale down to desired image dimensions");
return scaledWidth;
}
/**
* Returns the height of the largest scaled down image that the TurboJPEG
* decompressor can generate without exceeding the desired image width and
* height.
*
* @param desiredWidth desired width (in pixels) of the decompressed image.
* Setting this to 0 is the same as setting it to the width of the JPEG image
* (in other words, the width will not be considered when determining the
* scaled image size.)
*
* @param desiredHeight desired height (in pixels) of the decompressed image.
* Setting this to 0 is the same as setting it to the height of the JPEG
* image (in other words, the height will not be considered when determining
* the scaled image size.)
*
* @return the height of the largest scaled down image that the TurboJPEG
* decompressor can generate without exceeding the desired image width and
* height
*/
public int getScaledHeight(int desiredWidth, int desiredHeight)
throws Exception {
if(jpegWidth < 1 || jpegHeight < 1)
throw new Exception(NO_ASSOC_ERROR);
if(desiredWidth < 0 || desiredHeight < 0)
throw new Exception("Invalid argument in getScaledHeight()");
TJScalingFactor sf[] = TJ.getScalingFactors();
if(desiredWidth == 0) desiredWidth = jpegWidth;
if(desiredHeight == 0) desiredHeight = jpegHeight;
int scaledWidth = jpegWidth, scaledHeight = jpegHeight;
for(int i = 0; i < sf.length; i++) {
scaledWidth = sf[i].getScaled(jpegWidth);
scaledHeight = sf[i].getScaled(jpegHeight);
if(scaledWidth <= desiredWidth && scaledHeight <= desiredHeight)
break;
}
if(scaledWidth > desiredWidth || scaledHeight > desiredHeight)
throw new Exception("Could not scale down to desired image dimensions");
return scaledHeight;
}
/**
* Decompress the JPEG source image associated with this decompressor
* instance and output a decompressed image to the given destination buffer.
*
* @param dstBuf buffer that will receive the decompressed image. This
* buffer should normally be <code>pitch * scaledHeight</code> bytes in size,
* where <code>scaledHeight</code> can be determined by calling <code>
* scalingFactor.{@link TJScalingFactor#getScaled getScaled}(jpegHeight)
* </code> with one of the scaling factors returned from {@link
* TJ#getScalingFactors} or by calling {@link #getScaledHeight}.
*
* @param desiredWidth desired width (in pixels) of the decompressed image.
* If the desired image dimensions are smaller than the dimensions of the
* JPEG image being decompressed, then TurboJPEG will use scaling in the JPEG
* decompressor to generate the largest possible image that will fit within
* the desired dimensions. Setting this to 0 is the same as setting it to
* the width of the JPEG image (in other words, the width will not be
* considered when determining the scaled image size.)
*
* @param pitch bytes per line of the destination image. Normally, this
* should be set to <code>scaledWidth * TJ.pixelSize(pixelFormat)</code> if
* the decompressed image is unpadded, but you can use this to, for instance,
* pad each line of the decompressed image to a 4-byte boundary. NOTE:
* <code>scaledWidth</code> can be determined by calling <code>
* scalingFactor.{@link TJScalingFactor#getScaled getScaled}(jpegWidth)
* </code> or by calling {@link #getScaledWidth}. Setting this parameter to
* 0 is the equivalent of setting it to <code>scaledWidth *
* TJ.pixelSize(pixelFormat)</code>.
*
* @param desiredHeight desired height (in pixels) of the decompressed image.
* If the desired image dimensions are smaller than the dimensions of the
* JPEG image being decompressed, then TurboJPEG will use scaling in the JPEG
* decompressor to generate the largest possible image that will fit within
* the desired dimensions. Setting this to 0 is the same as setting it to
* the height of the JPEG image (in other words, the height will not be
* considered when determining the scaled image size.)
*
* @param pixelFormat pixel format of the decompressed image (one of
* {@link TJ TJ.PF_*})
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*/
public void decompress(byte[] dstBuf, int desiredWidth, int pitch,
int desiredHeight, int pixelFormat, int flags) throws Exception {
if(jpegBuf == null) throw new Exception(NO_ASSOC_ERROR);
if(dstBuf == null || desiredWidth < 0 || pitch < 0 || desiredHeight < 0
|| pixelFormat < 0 || pixelFormat >= TJ.NUMPF || flags < 0)
throw new Exception("Invalid argument in decompress()");
decompress(jpegBuf, jpegBufSize, dstBuf, desiredWidth, pitch,
desiredHeight, pixelFormat, flags);
}
/**
* Decompress the JPEG source image associated with this decompressor
* instance and return a buffer containing the decompressed image.
*
* @param desiredWidth see
* {@link #decompress(byte[], int, int, int, int, int)} for description
*
* @param pitch see
* {@link #decompress(byte[], int, int, int, int, int)} for description
*
* @param desiredHeight see
* {@link #decompress(byte[], int, int, int, int, int)} for description
*
* @param pixelFormat pixel format of the decompressed image (one of
* {@link TJ TJ.PF_*})
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*
* @return a buffer containing the decompressed image
*/
public byte[] decompress(int desiredWidth, int pitch, int desiredHeight,
int pixelFormat, int flags) throws Exception {
if(desiredWidth < 0 || pitch < 0 || desiredHeight < 0
|| pixelFormat < 0 || pixelFormat >= TJ.NUMPF || flags < 0)
throw new Exception("Invalid argument in decompress()");
int pixelSize = TJ.getPixelSize(pixelFormat);
int scaledWidth = getScaledWidth(desiredWidth, desiredHeight);
int scaledHeight = getScaledHeight(desiredWidth, desiredHeight);
if(pitch == 0) pitch = scaledWidth * pixelSize;
byte[] buf = new byte[pitch * scaledHeight];
decompress(buf, desiredWidth, pitch, desiredHeight, pixelFormat, flags);
return buf;
}
/**
* Decompress the JPEG source image associated with this decompressor
* instance and output a YUV planar image to the given destination buffer.
* This method performs JPEG decompression but leaves out the color
* conversion step, so a planar YUV image is generated instead of an RGB
* image. The padding of the planes in this image is the same as the images
* generated by {@link TJCompressor#encodeYUV(byte[], int)}. Note that, if
* the width or height of the image is not an even multiple of the MCU block
* size (see {@link TJ#getMCUWidth} and {@link TJ#getMCUHeight}), then an
* intermediate buffer copy will be performed within TurboJPEG.
*
* @param dstBuf buffer that will receive the YUV planar image. Use
* {@link TJ#bufSizeYUV} to determine the appropriate size for this buffer
* based on the image width, height, and level of chrominance subsampling.
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*/
public void decompressToYUV(byte[] dstBuf, int flags) throws Exception {
if(jpegBuf == null) throw new Exception(NO_ASSOC_ERROR);
if(dstBuf == null || flags < 0)
throw new Exception("Invalid argument in decompressToYUV()");
decompressToYUV(jpegBuf, jpegBufSize, dstBuf, flags);
}
/**
* Decompress the JPEG source image associated with this decompressor
* instance and return a buffer containing a YUV planar image. See {@link
* #decompressToYUV(byte[], int)} for more detail.
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*
* @return a buffer containing a YUV planar image
*/
public byte[] decompressToYUV(int flags) throws Exception {
if(flags < 0)
throw new Exception("Invalid argument in decompressToYUV()");
if(jpegWidth < 1 || jpegHeight < 1 || jpegSubsamp < 0)
throw new Exception(NO_ASSOC_ERROR);
if(jpegSubsamp >= TJ.NUMSAMP)
throw new Exception("JPEG header information is invalid");
byte[] buf = new byte[TJ.bufSizeYUV(jpegWidth, jpegHeight, jpegSubsamp)];
decompressToYUV(buf, flags);
return buf;
}
/**
* Decompress the JPEG source image associated with this decompressor
* instance and output a decompressed image to the given
* <code>BufferedImage</code> instance.
*
* @param dstImage a <code>BufferedImage</code> instance that will receive
* the decompressed image
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*/
public void decompress(BufferedImage dstImage, int flags) throws Exception {
if(dstImage == null || flags < 0)
throw new Exception("Invalid argument in decompress()");
int desiredWidth = dstImage.getWidth();
int desiredHeight = dstImage.getHeight();
int scaledWidth = getScaledWidth(desiredWidth, desiredHeight);
int scaledHeight = getScaledHeight(desiredWidth, desiredHeight);
if(scaledWidth != desiredWidth || scaledHeight != desiredHeight)
throw new Exception("BufferedImage dimensions do not match a scaled image size that TurboJPEG is capable of generating.");
int pixelFormat; boolean intPixels = false;
if(byteOrder == null)
byteOrder = ByteOrder.nativeOrder();
switch(dstImage.getType()) {
case BufferedImage.TYPE_3BYTE_BGR:
pixelFormat = TJ.PF_BGR; break;
case BufferedImage.TYPE_4BYTE_ABGR:
case BufferedImage.TYPE_4BYTE_ABGR_PRE:
pixelFormat = TJ.PF_XBGR; break;
case BufferedImage.TYPE_BYTE_GRAY:
pixelFormat = TJ.PF_GRAY; break;
case BufferedImage.TYPE_INT_BGR:
if(byteOrder == ByteOrder.BIG_ENDIAN)
pixelFormat = TJ.PF_XBGR;
else
pixelFormat = TJ.PF_RGBX;
intPixels = true; break;
case BufferedImage.TYPE_INT_RGB:
if(byteOrder == ByteOrder.BIG_ENDIAN)
pixelFormat = TJ.PF_XRGB;
else
pixelFormat = TJ.PF_BGRX;
intPixels = true; break;
case BufferedImage.TYPE_INT_ARGB:
case BufferedImage.TYPE_INT_ARGB_PRE:
if(byteOrder == ByteOrder.BIG_ENDIAN)
pixelFormat = TJ.PF_ARGB;
else
pixelFormat = TJ.PF_BGRA;
intPixels = true; break;
default:
throw new Exception("Unsupported BufferedImage format");
}
WritableRaster wr = dstImage.getRaster();
if(intPixels) {
SinglePixelPackedSampleModel sm =
(SinglePixelPackedSampleModel)dstImage.getSampleModel();
int pitch = sm.getScanlineStride();
DataBufferInt db = (DataBufferInt)wr.getDataBuffer();
int[] buf = db.getData();
if(jpegBuf == null) throw new Exception(NO_ASSOC_ERROR);
decompress(jpegBuf, jpegBufSize, buf, scaledWidth, pitch, scaledHeight,
pixelFormat, flags);
}
else {
ComponentSampleModel sm =
(ComponentSampleModel)dstImage.getSampleModel();
int pixelSize = sm.getPixelStride();
if(pixelSize != TJ.getPixelSize(pixelFormat))
throw new Exception("Inconsistency between pixel format and pixel size in BufferedImage");
int pitch = sm.getScanlineStride();
DataBufferByte db = (DataBufferByte)wr.getDataBuffer();
byte[] buf = db.getData();
decompress(buf, scaledWidth, pitch, scaledHeight, pixelFormat, flags);
}
}
/**
* Decompress the JPEG source image associated with this decompressor
* instance and return a <code>BufferedImage</code> instance containing the
* decompressed image.
*
* @param desiredWidth see
* {@link #decompress(byte[], int, int, int, int, int)} for description
*
* @param desiredHeight see
* {@link #decompress(byte[], int, int, int, int, int)} for description
*
* @param bufferedImageType the image type of the newly-created
* <code>BufferedImage</code> instance (for instance,
* <code>BufferedImage.TYPE_INT_RGB</code>)
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*
* @return a <code>BufferedImage</code> instance containing the
* decompressed image
*/
public BufferedImage decompress(int desiredWidth, int desiredHeight,
int bufferedImageType, int flags) throws Exception {
if(desiredWidth < 0 || desiredHeight < 0 || flags < 0)
throw new Exception("Invalid argument in decompress()");
int scaledWidth = getScaledWidth(desiredWidth, desiredHeight);
int scaledHeight = getScaledHeight(desiredWidth, desiredHeight);
BufferedImage img = new BufferedImage(scaledWidth, scaledHeight,
bufferedImageType);
decompress(img, flags);
return img;
}
/**
* Free the native structures associated with this decompressor instance.
*/
public void close() throws Exception {
destroy();
}
protected void finalize() throws Throwable {
try {
close();
}
catch(Exception e) {}
finally {
super.finalize();
}
};
private native void init() throws Exception;
private native void destroy() throws Exception;
private native void decompressHeader(byte[] srcBuf, int size)
throws Exception;
private native void decompress(byte[] srcBuf, int size, byte[] dstBuf,
int desiredWidth, int pitch, int desiredHeight, int pixelFormat, int flags)
throws Exception;
private native void decompress(byte[] srcBuf, int size, int[] dstBuf,
int desiredWidth, int pitch, int desiredHeight, int pixelFormat, int flags)
throws Exception;
private native void decompressToYUV(byte[] srcBuf, int size, byte[] dstBuf,
int flags)
throws Exception;
static {
TJLoader.load();
}
protected long handle = 0;
protected byte[] jpegBuf = null;
protected int jpegBufSize = 0;
protected int jpegWidth = 0;
protected int jpegHeight = 0;
protected int jpegSubsamp = -1;
private ByteOrder byteOrder = null;
};

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/*
* Copyright (C)2011 D. R. Commander. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the libjpeg-turbo Project nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.libjpegturbo.turbojpeg;
final class TJLoader {
static void load() {
System.loadLibrary("turbojpeg");
}
};

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/*
* Copyright (C)2011 D. R. Commander. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the libjpeg-turbo Project nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.libjpegturbo.turbojpeg;
final class TJLoader {
static void load() {
System.loadLibrary("@TURBOJPEG_DLL_NAME@");
}
};

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/*
* Copyright (C)2011 D. R. Commander. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the libjpeg-turbo Project nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.libjpegturbo.turbojpeg;
/**
* Fractional scaling factor
*/
public class TJScalingFactor {
public TJScalingFactor(int num, int denom) throws Exception {
if(num < 1 || denom < 1)
throw new Exception("Numerator and denominator must be >= 1");
this.num = num;
this.denom = denom;
}
/**
* Returns numerator
* @return numerator
*/
public int getNum() {
return num;
}
/**
* Returns denominator
* @return denominator
*/
public int getDenom() {
return denom;
}
/**
* Returns the scaled value of <code>dimension</code>. This function
* performs the integer equivalent of
* <code>ceil(dimension * scalingFactor)</code>.
* @return the scaled value of <code>dimension</code>
*/
public int getScaled(int dimension) {
return (dimension * num + denom - 1) / denom;
}
/**
* Returns true or false, depending on whether this instance and
* <code>other</code> have the same numerator and denominator.
* @return true or false, depending on whether this instance and
* <code>other</code> have the same numerator and denominator
*/
public boolean equals(TJScalingFactor other) {
return (this.num == other.num && this.denom == other.denom);
}
/**
* Returns true or false, depending on whether this instance is equal to
* 1/1.
* @return true or false, depending on whether this instance is equal to
* 1/1
*/
public boolean isOne() {
return (num == 1 && denom == 1);
}
/**
* Numerator
*/
private int num = 1;
/**
* Denominator
*/
private int denom = 1;
};

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/*
* Copyright (C)2011 D. R. Commander. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the libjpeg-turbo Project nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.libjpegturbo.turbojpeg;
import java.awt.*;
/**
* Lossless transform parameters
*/
public class TJTransform extends Rectangle {
private static final long serialVersionUID = -127367705761430371L;
/**
* The number of lossless transform operations
*/
final public static int NUMOP = 8;
/**
* Do not transform the position of the image pixels.
*/
final public static int OP_NONE = 0;
/**
* Flip (mirror) image horizontally. This transform is imperfect if there
* are any partial MCU blocks on the right edge.
* @see #OPT_PERFECT
*/
final public static int OP_HFLIP = 1;
/**
* Flip (mirror) image vertically. This transform is imperfect if there are
* any partial MCU blocks on the bottom edge.
* @see #OPT_PERFECT
*/
final public static int OP_VFLIP = 2;
/**
* Transpose image (flip/mirror along upper left to lower right axis). This
* transform is always perfect.
* @see #OPT_PERFECT
*/
final public static int OP_TRANSPOSE = 3;
/**
* Transverse transpose image (flip/mirror along upper right to lower left
* axis). This transform is imperfect if there are any partial MCU blocks in
* the image.
* @see #OPT_PERFECT
*/
final public static int OP_TRANSVERSE = 4;
/**
* Rotate image clockwise by 90 degrees. This transform is imperfect if
* there are any partial MCU blocks on the bottom edge.
* @see #OPT_PERFECT
*/
final public static int OP_ROT90 = 5;
/**
* Rotate image 180 degrees. This transform is imperfect if there are any
* partial MCU blocks in the image.
* @see #OPT_PERFECT
*/
final public static int OP_ROT180 = 6;
/**
* Rotate image counter-clockwise by 90 degrees. This transform is imperfect
* if there are any partial MCU blocks on the right edge.
* @see #OPT_PERFECT
*/
final public static int OP_ROT270 = 7;
/**
* This option will cause {@link TJTransformer#transform
* TJTransformer.transform()} to throw an exception if the transform is not
* perfect. Lossless transforms operate on MCU blocks, whose size depends on
* the level of chrominance subsampling used. If the image's width or height
* is not evenly divisible by the MCU block size (see {@link TJ#getMCUWidth}
* and {@link TJ#getMCUHeight}), then there will be partial MCU blocks on the
* right and/or bottom edges. It is not possible to move these partial MCU
* blocks to the top or left of the image, so any transform that would
* require that is "imperfect." If this option is not specified, then any
* partial MCU blocks that cannot be transformed will be left in place, which
* will create odd-looking strips on the right or bottom edge of the image.
*/
final public static int OPT_PERFECT = 1;
/**
* This option will discard any partial MCU blocks that cannot be
* transformed.
*/
final public static int OPT_TRIM = 2;
/**
* This option will enable lossless cropping.
*/
final public static int OPT_CROP = 4;
/**
* This option will discard the color data in the input image and produce
* a grayscale output image.
*/
final public static int OPT_GRAY = 8;
/**
* This option will prevent {@link TJTransformer#transform
* TJTransformer.transform()} from outputting a JPEG image for this
* particular transform. This can be used in conjunction with a custom
* filter to capture the transformed DCT coefficients without transcoding
* them.
*/
final public static int OPT_NOOUTPUT = 16;
/**
* Create a new lossless transform instance.
*/
public TJTransform() {
}
/**
* Create a new lossless transform instance with the given parameters.
*
* @param x the left boundary of the cropping region. This must be evenly
* divisible by the MCU block width (see {@link TJ#getMCUWidth})
*
* @param y the upper boundary of the cropping region. This must be evenly
* divisible by the MCU block height (see {@link TJ#getMCUHeight})
*
* @param w the width of the cropping region. Setting this to 0 is the
* equivalent of setting it to the width of the source JPEG image - x.
*
* @param h the height of the cropping region. Setting this to 0 is the
* equivalent of setting it to the height of the source JPEG image - y.
*
* @param op one of the transform operations (<code>OP_*</code>)
*
* @param options the bitwise OR of one or more of the transform options
* (<code>OPT_*</code>)
*
* @param cf an instance of an object that implements the {@link
* TJCustomFilter} interface, or null if no custom filter is needed
*/
public TJTransform(int x, int y, int w, int h, int op, int options,
TJCustomFilter cf) throws Exception {
super(x, y, w, h);
this.op = op; this.options = options; this.cf = cf;
}
/**
* Create a new lossless transform instance with the given parameters.
*
* @param r a <code>Rectangle</code> instance that specifies the cropping
* region. See {@link
* #TJTransform(int, int, int, int, int, int, TJCustomFilter)} for more
* detail.
*
* @param op one of the transform operations (<code>OP_*</code>)
*
* @param options the bitwise OR of one or more of the transform options
* (<code>OPT_*</code>)
*
* @param cf an instance of an object that implements the {@link
* TJCustomFilter} interface, or null if no custom filter is needed
*/
public TJTransform(Rectangle r, int op, int options,
TJCustomFilter cf) throws Exception {
super(r);
this.op = op; this.options = options; this.cf = cf;
}
/**
* Transform operation (one of <code>OP_*</code>)
*/
public int op = 0;
/**
* Transform options (bitwise OR of one or more of <code>OPT_*</code>)
*/
public int options = 0;
/**
* Custom filter instance
*/
public TJCustomFilter cf = null;
}

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/*
* Copyright (C)2011 D. R. Commander. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - Neither the name of the libjpeg-turbo Project nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package org.libjpegturbo.turbojpeg;
/**
* TurboJPEG lossless transformer
*/
public class TJTransformer extends TJDecompressor {
/**
* Create a TurboJPEG lossless transformer instance.
*/
public TJTransformer() throws Exception {
init();
}
/**
* Create a TurboJPEG lossless transformer instance and associate the JPEG
* image stored in <code>jpegImage</code> with the newly-created instance.
*
* @param jpegImage JPEG image buffer (size of the JPEG image is assumed to
* be the length of the array)
*/
public TJTransformer(byte[] jpegImage) throws Exception {
init();
setJPEGImage(jpegImage, jpegImage.length);
}
/**
* Create a TurboJPEG lossless transformer instance and associate the JPEG
* image of length <code>imageSize</code> bytes stored in
* <code>jpegImage</code> with the newly-created instance.
*
* @param jpegImage JPEG image buffer
*
* @param imageSize size of the JPEG image (in bytes)
*/
public TJTransformer(byte[] jpegImage, int imageSize) throws Exception {
init();
setJPEGImage(jpegImage, imageSize);
}
/**
* Losslessly transform the JPEG image associated with this transformer
* instance into one or more JPEG images stored in the given destination
* buffers. Lossless transforms work by moving the raw coefficients from one
* JPEG image structure to another without altering the values of the
* coefficients. While this is typically faster than decompressing the
* image, transforming it, and re-compressing it, lossless transforms are not
* free. Each lossless transform requires reading and Huffman decoding all
* of the coefficients in the source image, regardless of the size of the
* destination image. Thus, this method provides a means of generating
* multiple transformed images from the same source or of applying multiple
* transformations simultaneously, in order to eliminate the need to read the
* source coefficients multiple times.
*
* @param dstBufs an array of image buffers. <code>dstbufs[i]</code> will
* receive a JPEG image that has been transformed using the parameters in
* <code>transforms[i]</code>. Use {@link TJ#bufSize} to determine the
* maximum size for each buffer based on the cropped width and height.
*
* @param transforms an array of {@link TJTransform} instances, each of
* which specifies the transform parameters and/or cropping region for the
* corresponding transformed output image
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*/
public void transform(byte[][] dstBufs, TJTransform[] transforms,
int flags) throws Exception {
if(jpegBuf == null) throw new Exception("JPEG buffer not initialized");
transformedSizes = transform(jpegBuf, jpegBufSize, dstBufs, transforms,
flags);
}
/**
* Losslessly transform the JPEG image associated with this transformer
* instance and return an array of {@link TJDecompressor} instances, each of
* which has a transformed JPEG image associated with it.
*
* @param transforms an array of {@link TJTransform} instances, each of
* which specifies the transform parameters and/or cropping region for the
* corresponding transformed output image
*
* @return an array of {@link TJDecompressor} instances, each of
* which has a transformed JPEG image associated with it
*
* @param flags the bitwise OR of one or more of {@link TJ TJ.FLAG_*}
*/
public TJDecompressor[] transform(TJTransform[] transforms, int flags)
throws Exception {
byte[][] dstBufs = new byte[transforms.length][];
if(jpegWidth < 1 || jpegHeight < 1)
throw new Exception("JPEG buffer not initialized");
for(int i = 0; i < transforms.length; i++) {
int w = jpegWidth, h = jpegHeight;
if((transforms[i].options & TJTransform.OPT_CROP) != 0) {
if(transforms[i].width != 0) w = transforms[i].width;
if(transforms[i].height != 0) h = transforms[i].height;
}
dstBufs[i] = new byte[TJ.bufSize(w, h, jpegSubsamp)];
}
TJDecompressor[] tjd = new TJDecompressor[transforms.length];
transform(dstBufs, transforms, flags);
for(int i = 0; i < transforms.length; i++)
tjd[i] = new TJDecompressor(dstBufs[i], transformedSizes[i]);
return tjd;
}
/**
* Returns an array containing the sizes of the transformed JPEG images from
* the most recent call to {@link #transform transform()}.
*
* @return an array containing the sizes of the transformed JPEG images from
* the most recent call to {@link #transform transform()}
*/
public int[] getTransformedSizes() throws Exception {
if(transformedSizes == null)
throw new Exception("No image has been transformed yet");
return transformedSizes;
}
private native void init() throws Exception;
private native int[] transform(byte[] srcBuf, int srcSize, byte[][] dstBufs,
TJTransform[] transforms, int flags) throws Exception;
static {
TJLoader.load();
}
private int[] transformedSizes = null;
};