Field Detail

• handle

  protected long handle

• jpegBuf

  protected byte[] jpegBuf

• jpegBufSize

  protected int jpegBufSize

• yuvImage

  protected YUVImage yuvImage

• jpegWidth

  protected int jpegWidth

• jpegHeight

  protected int jpegHeight

• jpegSubsamp

  protected int jpegSubsamp

• jpegColorspace

  protected int jpegColorspace

Constructor Detail

• TJDecompressor

  public TJDecompressor()
                 throws TJException

  Create a TurboJPEG decompresssor instance.

  Throws:

  TJException

• TJDecompressor

  public TJDecompressor(byte[] jpegImage)
                 throws TJException

  Create a TurboJPEG decompressor instance and associate the JPEG source image stored in jpegImage with the newly created instance.

  Parameters:

  jpegImage - JPEG image buffer (size of the JPEG image is assumed to be the length of the array.) This buffer is not modified.

  Throws:

  TJException

• TJDecompressor

  public TJDecompressor(byte[] jpegImage,
                int imageSize)
                 throws TJException

  Create a TurboJPEG decompressor instance and associate the JPEG source image of length imageSize bytes stored in jpegImage with the newly created instance.

  Parameters:

  jpegImage - JPEG image buffer. This buffer is not modified.

  imageSize - size of the JPEG image (in bytes)

  Throws:

  TJException

• TJDecompressor

  public TJDecompressor(YUVImage yuvImage)
                 throws TJException

  Create a TurboJPEG decompressor instance and associate the YUV planar source image stored in yuvImage with the newly created instance.

  Parameters:

  yuvImage - YUVImage instance containing a YUV planar image to be decoded. This image is not modified.

  Throws:

  TJException

Method Detail

• setSourceImage

  public void setSourceImage(byte[] jpegImage,
                    int imageSize)
                      throws TJException

  Associate the JPEG image of length imageSize bytes stored in jpegImage with this decompressor instance. This image will be used as the source image for subsequent decompress operations.

  Parameters:

  jpegImage - JPEG image buffer. This buffer is not modified.

  imageSize - size of the JPEG image (in bytes)

  Throws:

  TJException

• setJPEGImage

  @Deprecated
  public void setJPEGImage(byte[] jpegImage,
                             int imageSize)
                    throws TJException

  Deprecated. Use setSourceImage(byte[], int) instead.

  Throws:

  TJException

• setSourceImage

  public void setSourceImage(YUVImage srcImage)

  Associate the specified YUV planar source image with this decompressor instance. Subsequent decompress operations will decode this image into an RGB or grayscale destination image.

  Parameters:

  srcImage - YUVImage instance containing a YUV planar image to be decoded. This image is not modified.

• getWidth

  public int getWidth()

  Returns the width of the source image (JPEG or YUV) associated with this decompressor instance.

  Returns:

  the width of the source image (JPEG or YUV) associated with this decompressor instance.

• getHeight

  public int getHeight()

  Returns the height of the source image (JPEG or YUV) associated with this decompressor instance.

  Returns:

  the height of the source image (JPEG or YUV) associated with this decompressor instance.

• getSubsamp

  public int getSubsamp()

  Returns the level of chrominance subsampling used in the source image (JPEG or YUV) associated with this decompressor instance. See TJ.SAMP_*.

  Returns:

  the level of chrominance subsampling used in the source image (JPEG or YUV) associated with this decompressor instance.

• getColorspace

  public int getColorspace()

  Returns the colorspace used in the source image (JPEG or YUV) associated with this decompressor instance. See TJ.CS_*. If the source image is YUV, then this always returns TJ.CS_YCbCr.

  Returns:

  the colorspace used in the source image (JPEG or YUV) associated with this decompressor instance.

• getJPEGBuf

  public byte[] getJPEGBuf()

  Returns the JPEG image buffer associated with this decompressor instance.

  Returns:

  the JPEG image buffer associated with this decompressor instance.

• getJPEGSize

  public int getJPEGSize()

  Returns the size of the JPEG image (in bytes) associated with this decompressor instance.

  Returns:

  the size of the JPEG image (in bytes) associated with this decompressor instance.

• getScaledWidth

  public int getScaledWidth(int desiredWidth,
                   int desiredHeight)

  Returns the width of the largest scaled-down image that the TurboJPEG decompressor can generate without exceeding the desired image width and height.

  Parameters:

  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.)

  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.)

  Returns:

  the width of the largest scaled-down image that the TurboJPEG decompressor can generate without exceeding the desired image width and height.

• getScaledHeight

  public int getScaledHeight(int desiredWidth,
                    int desiredHeight)

  Returns the height of the largest scaled-down image that the TurboJPEG decompressor can generate without exceeding the desired image width and height.

  Parameters:

  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.)

  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.)

  Returns:

  the height of the largest scaled-down image that the TurboJPEG decompressor can generate without exceeding the desired image width and height.

• decompress

  public void decompress(byte[] dstBuf,
                int x,
                int y,
                int desiredWidth,
                int pitch,
                int desiredHeight,
                int pixelFormat,
                int flags)
                  throws TJException

  Decompress the JPEG source image or decode the YUV source image associated with this decompressor instance and output a grayscale, RGB, or CMYK image to the given destination buffer.

  NOTE: The output image is fully recoverable if this method throws a non-fatal TJException (unless TJ.FLAG_STOPONWARNING is specified.)

  Parameters:

  dstBuf - buffer that will receive the decompressed/decoded image. If the source image is a JPEG image, then this buffer should normally be pitch * scaledHeight bytes in size, where scaledHeight can be determined by calling scalingFactor.getScaled(jpegHeight) with one of the scaling factors returned from TJ.getScalingFactors() or by calling getScaledHeight(int, int). If the source image is a YUV image, then this buffer should normally be pitch * height bytes in size, where height is the height of the YUV image. However, the buffer may also be larger than the dimensions of the source image, in which case the x, y, and pitch parameters can be used to specify the region into which the source image should be decompressed/decoded.

  x - x offset (in pixels) of the region in the destination image into which the source image should be decompressed/decoded

  y - y offset (in pixels) of the region in the destination image into which the source image should be decompressed/decoded

  desiredWidth - If the source image is a JPEG image, then this specifies the desired width (in pixels) of the decompressed image (or image region.) If the desired destination image dimensions are different than the source image dimensions, 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.) This parameter is ignored if the source image is a YUV image.

  pitch - bytes per line of the destination image. Normally, this should be set to scaledWidth * TJ.pixelSize(pixelFormat) if the destination image is unpadded, but you can use this to, for instance, pad each line of the destination image to a 4-byte boundary or to decompress/decode the source image into a region of a larger image. NOTE: if the source image is a JPEG image, then scaledWidth can be determined by calling scalingFactor.getScaled(jpegWidth) or by calling getScaledWidth(int, int). If the source image is a YUV image, then scaledWidth is the width of the YUV image. Setting this parameter to 0 is the equivalent of setting it to scaledWidth * TJ.pixelSize(pixelFormat).

  desiredHeight - If the source image is a JPEG image, then this specifies the desired height (in pixels) of the decompressed image (or image region.) If the desired destination image dimensions are different than the source image dimensions, 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.) This parameter is ignored if the source image is a YUV image.

  pixelFormat - pixel format of the decompressed/decoded image (one of TJ.PF_*)

  flags - the bitwise OR of one or more of TJ.FLAG_*

  Throws:

  TJException

• decompress

  @Deprecated
  public void decompress(byte[] dstBuf,
                           int desiredWidth,
                           int pitch,
                           int desiredHeight,
                           int pixelFormat,
                           int flags)
                  throws TJException

  Deprecated. Use decompress(byte[], int, int, int, int, int, int, int) instead.

  Throws:

  TJException

• decompress

  public byte[] decompress(int desiredWidth,
                  int pitch,
                  int desiredHeight,
                  int pixelFormat,
                  int flags)
                    throws TJException

  Decompress the JPEG source image associated with this decompressor instance and return a buffer containing the decompressed image.

  Parameters:

  desiredWidth - see decompress(byte[], int, int, int, int, int, int, int) for description

  pitch - see decompress(byte[], int, int, int, int, int, int, int) for description

  desiredHeight - see decompress(byte[], int, int, int, int, int, int, int) for description

  pixelFormat - pixel format of the decompressed image (one of TJ.PF_*)

  flags - the bitwise OR of one or more of TJ.FLAG_*

  Returns:

  a buffer containing the decompressed image.

  Throws:

  TJException

• decompressToYUV

  public void decompressToYUV(YUVImage dstImage,
                     int flags)
                       throws TJException

  Decompress the JPEG source image associated with this decompressor instance into a YUV planar image and store it in the given YUVImage instance. This method performs JPEG decompression but leaves out the color conversion step, so a planar YUV image is generated instead of an RGB or grayscale image. This method cannot be used to decompress JPEG source images with the CMYK or YCCK colorspace.

  NOTE: The YUV planar output image is fully recoverable if this method throws a non-fatal TJException (unless TJ.FLAG_STOPONWARNING is specified.)

  Parameters:

  dstImage - YUVImage instance that will receive the YUV planar image. The level of subsampling specified in this YUVImage instance must match that of the JPEG image, and the width and height specified in the YUVImage instance must match one of the scaled image sizes that TurboJPEG is capable of generating from the JPEG source image.

  flags - the bitwise OR of one or more of TJ.FLAG_*

  Throws:

  TJException

• decompressToYUV

  @Deprecated
  public void decompressToYUV(byte[] dstBuf,
                                int flags)
                       throws TJException

  Deprecated. Use decompressToYUV(YUVImage, int) instead.

  Throws:

  TJException

• decompressToYUV

  public YUVImage decompressToYUV(int desiredWidth,
                         int[] strides,
                         int desiredHeight,
                         int flags)
                           throws TJException

  Decompress the JPEG source image associated with this decompressor instance into a set of Y, U (Cb), and V (Cr) image planes and return a YUVImage instance containing the decompressed image planes. This method performs JPEG decompression but leaves out the color conversion step, so a planar YUV image is generated instead of an RGB or grayscale image. This method cannot be used to decompress JPEG source images with the CMYK or YCCK colorspace.

  Parameters:

  desiredWidth - desired width (in pixels) of the YUV image. If the desired image dimensions are different 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.)

  strides - an array of integers, each specifying the number of bytes per line in the corresponding plane of the output image. Setting the stride for any plane to 0 is the same as setting it to the scaled component width of the plane. If strides is NULL, then the strides for all planes will be set to their respective scaled component widths. You can adjust the strides in order to add an arbitrary amount of line padding to each plane.

  desiredHeight - desired height (in pixels) of the YUV image. If the desired image dimensions are different 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.)

  flags - the bitwise OR of one or more of TJ.FLAG_*

  Returns:

  a YUV planar image.

  Throws:

  TJException

• decompressToYUV

  public YUVImage decompressToYUV(int desiredWidth,
                         int pad,
                         int desiredHeight,
                         int flags)
                           throws TJException

  Decompress the JPEG source image associated with this decompressor instance into a unified YUV planar image buffer and return a YUVImage instance containing the decompressed image. This method performs JPEG decompression but leaves out the color conversion step, so a planar YUV image is generated instead of an RGB or grayscale image. This method cannot be used to decompress JPEG source images with the CMYK or YCCK colorspace.

  Parameters:

  desiredWidth - desired width (in pixels) of the YUV image. If the desired image dimensions are different 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.)

  pad - the width of each line in each plane of the YUV image will be padded to the nearest multiple of this number of bytes (must be a power of 2.)

  desiredHeight - desired height (in pixels) of the YUV image. If the desired image dimensions are different 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.)

  flags - the bitwise OR of one or more of TJ.FLAG_*

  Returns:

  a YUV planar image.

  Throws:

  TJException

• decompressToYUV

  @Deprecated
  public byte[] decompressToYUV(int flags)
                         throws TJException

  Deprecated. Use decompressToYUV(int, int, int, int) instead.

  Throws:

  TJException

• decompress

  public void decompress(int[] dstBuf,
                int x,
                int y,
                int desiredWidth,
                int stride,
                int desiredHeight,
                int pixelFormat,
                int flags)
                  throws TJException

  Decompress the JPEG source image or decode the YUV source image associated with this decompressor instance and output a grayscale, RGB, or CMYK image to the given destination buffer.

  NOTE: The output image is fully recoverable if this method throws a non-fatal TJException (unless TJ.FLAG_STOPONWARNING is specified.)

  Parameters:

  dstBuf - buffer that will receive the decompressed/decoded image. If the source image is a JPEG image, then this buffer should normally be stride * scaledHeight pixels in size, where scaledHeight can be determined by calling scalingFactor.getScaled(jpegHeight) with one of the scaling factors returned from TJ.getScalingFactors() or by calling getScaledHeight(int, int). If the source image is a YUV image, then this buffer should normally be stride * height pixels in size, where height is the height of the YUV image. However, the buffer may also be larger than the dimensions of the JPEG image, in which case the x, y, and stride parameters can be used to specify the region into which the source image should be decompressed.

  x - x offset (in pixels) of the region in the destination image into which the source image should be decompressed/decoded

  y - y offset (in pixels) of the region in the destination image into which the source image should be decompressed/decoded

  desiredWidth - If the source image is a JPEG image, then this specifies the desired width (in pixels) of the decompressed image (or image region.) If the desired destination image dimensions are different than the source image dimensions, 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.) This parameter is ignored if the source image is a YUV image.

  stride - pixels per line of the destination image. Normally, this should be set to scaledWidth, but you can use this to, for instance, decompress the JPEG image into a region of a larger image. NOTE: if the source image is a JPEG image, then scaledWidth can be determined by calling scalingFactor.getScaled(jpegWidth) or by calling getScaledWidth(int, int). If the source image is a YUV image, then scaledWidth is the width of the YUV image. Setting this parameter to 0 is the equivalent of setting it to scaledWidth.

  desiredHeight - If the source image is a JPEG image, then this specifies the desired height (in pixels) of the decompressed image (or image region.) If the desired destination image dimensions are different than the source image dimensions, 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.) This parameter is ignored if the source image is a YUV image.

  pixelFormat - pixel format of the decompressed image (one of TJ.PF_*)

  flags - the bitwise OR of one or more of TJ.FLAG_*

  Throws:

  TJException

• decompress

  public void decompress(java.awt.image.BufferedImage dstImage,
                int flags)
                  throws TJException

  Decompress the JPEG source image or decode the YUV source image associated with this decompressor instance and output a decompressed/decoded image to the given BufferedImage instance.

  NOTE: The output image is fully recoverable if this method throws a non-fatal TJException (unless TJ.FLAG_STOPONWARNING is specified.)

  Parameters:

  dstImage - a BufferedImage instance that will receive the decompressed/decoded image. If the source image is a JPEG image, then the width and height of the BufferedImage instance must match one of the scaled image sizes that TurboJPEG is capable of generating from the JPEG image. If the source image is a YUV image, then the width and height of the BufferedImage instance must match the width and height of the YUV image.

  flags - the bitwise OR of one or more of TJ.FLAG_*

  Throws:

  TJException

• decompress

  public java.awt.image.BufferedImage decompress(int desiredWidth,
                                        int desiredHeight,
                                        int bufferedImageType,
                                        int flags)
                                          throws TJException

  Decompress the JPEG source image or decode the YUV source image associated with this decompressor instance and return a BufferedImage instance containing the decompressed/decoded image.

  Parameters:

  desiredWidth - see decompress(byte[], int, int, int, int, int, int, int) for description

  desiredHeight - see decompress(byte[], int, int, int, int, int, int, int) for description

  bufferedImageType - the image type of the BufferedImage instance that will be created (for instance, BufferedImage.TYPE_INT_RGB)

  flags - the bitwise OR of one or more of TJ.FLAG_*

  Returns:

  a BufferedImage instance containing the decompressed/decoded image.

  Throws:

  TJException

• close

  public void close()
             throws TJException

  Free the native structures associated with this decompressor instance.

  Specified by:

  close in interface java.io.Closeable

  Specified by:

  close in interface java.lang.AutoCloseable

  Throws:

  TJException

• finalize

  protected void finalize()
                   throws java.lang.Throwable

  Overrides:

  finalize in class java.lang.Object

  Throws:

  java.lang.Throwable