Ptz decoder rs232

Hello,
I'm making a project about controlling a rotor camera with labview.
These are my hardware devices:
- a ptz decoder: http://www.chinasecuritysystem.com/IDRS-Brand/DVR-Accessories/PTZ-Decoders/167.html
- a rs232-rs485 converter: http://www.raschkeitsolution.de/images/product_images/popup_...s/54_0.jpg
- a camera rotor: http://www.videofrank.nl/camera-rotor-pantilt-wand-p-1143.html
The decoder is working with the Pelco-D protocol.
Have anyone experiencie with controlling the pelco-d protocol in labview?
Regards,
Kevin

vzv wrote:
I am using continuous run for my work. My intended idea was to select the text file at the beginning of each data collection (create/open existing file) such that the values from the board are stored as a list in a new text file or get appended (if it is an already used text file) during the continuous run.
I don't see a difference when I change the set file position between start/current/end. How do I avoid this overwriting of the data?
Thank you,
vzv
You need to set the file position before writing to the file. This requires opening the file first and also be sure to close it when complete.
There are only two ways to tell somebody thanks: Kudos and Marked Solutions
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Similar Messages

Rs232 decoding of recieved data

I have been unable to work out from the supplied examples how to decode received data from the RS232 connection, the data is being sent from and pic micro-controller (16F877)? How can I do this? Probably over looked something very simple, but this is the first time I have used this software?

Hi,
Serial communication is based on transmiting byte-sized (max.) frames, which is why most serial port APIs use strings data types to represent the data, both sent and received.
I assume you are using the RS232 CVI functions (not VISA). Then, you would use ComRd to read from the serial port. The returned data is stored in a char array (string). The serial driver simply puts the received bytes in this array. The actual format of the data depends on what your instrument is sending. It could be sending ASCII data, interger values (8-bit, 16-bit or 32-bit), little or big endian, etc. The number of data formats is infinite. You need to determine exactly what the device is sending and parse the returned array according to that.
Rememb
er that the serial API just provides the communication channel. It doesn't play any role on what is being sent.
Hope this helps.
DiegoF
National Instruments.

??? ALARM??? -no connection between rs232 and PC when using serialread.vi

i send you my code and whats happening when there is no connection with my RS232.the program execution doesnt stop but there is no data flow from the RS232.how to detect that there is no connection.
Attachments:
Pita.vi ‏87 KB
Pitai.ace ‏23 KB

There is not much execution control in the code; the initialization might be done prior or after the write, and you do a read without knowing how many bytes there really is at the port. Use dat flow to ensure that things execute in the correct order, and use the bytes at port to check whether the 7 byte reply has been received, do not read and decode before bytes at port reports that there is 7 bytes available...
MTO

How to decode a set of datas received from serial port and display image on a canvas based on CVI ?

Hi !
I have received a set of datas via rs232 and it contains picture messages. I have to decode the datas first and then display them on a canvas.
I have known several functions that may be used . Such as
int SetBitmapData (int bitmapID, int bytesPerRow, int pixelDepth, int colorTable[], unsigned char bits[], unsigned char mask[]);
int CanvasDrawBitmap (int panelHandle, int controlID, int bitmapID, Rect sourceRectangle, Rect destinationRectangle);
However,I don't know how to set the following parameters according to the actual pixel values and color values.
int bytesPerRow, int pixelDepth, int colorTable[], unsigned char bits[], unsigned char mask[]
What's more,I have no idea how to decode the datas.
The attachment is a incomplete project. I will be very appreciated if anyone could help me .
Best regards.
xiepei
I wouldn't care success or failure,for I will only struggle ahead as long as I have been destined to the distance.
Attachments:
Decode and display image.zip ‏212 KB

Well, things are getting a bit clearer now.
1. Your image is actually 240x240 pixel (not 320x240 as you told before). The size of image data is 57600 bytes which corresponds to that frmat (I was puzzled by such a data size compared with larger image dimensions!)
2. The image is a 8-bits-per-pixel one; this means that you must provide a color palette to create the bitmap
3. You cannot simply copy image data into bitmap fields in CVI: CreateBitmap always produce an image with pixeldepth matched with display colour depth (normally 24 or 32 bpp)
All that means that you must:
1. Create the appropriate color palette with 256 colors: it may be a grayscale or color palette depending on camera characteristics. Grayscale palette can be found in my sample project, while sample colour palettes can be found here (here the description of a "standard" 8-bpp color palette)
2. Create the bits array correctly dimensioned for the color depth of your monitor
3. Get each pixel value from the camera, lookup in the color palette for the appropriate colour and create the RGB informations into the bits array in memory
4. Display the bitmap on the canvas
As a first step, I would configure my system for 256-color display setting, create a bitmap and simply copy image data into it: you should be able to get the correct image back to your screen.
Proud to use LW/CVI from 3.1 on.
My contributions to the Developer Zone Community
If I have helped you, why not giving me a kudos?

RS232 HANDSHAKING

I have built a system that uses a Xilinx Spartan II to decode and route signals from a collection of motion control and feedback devices. LabVIEW communicates with the FPGA over RS232 at 115200baud, with no parity, 8 data and 2 stop bits. I have tried to implement a basic handshaking arrangement in which data is not sent from the FPGA until the RTS line is toggled.
I have written a sub-Vi that uses the core of the Advance Serial Communications example VI. I have been experiencing timeout problems if I run this VI continuously. My best guess is that I have a race condition between the port actually becoming ready to receive data and the start of data transmission. The framework of this sub-VI is as follows:
1. configure port
2. toggle RTS line
3. set input buffer size
4. read port
5. close port
The delay within the FPGA is negligible and the port register should be empty and ready to receive data before I signal the start of transmission. When does the port become ready to do so?

Daniel,
If you are using a Whileloop structure in your code, you do not need to use the "Run Continuously" option in LabVIEW. You do not want to open and close your serial port all the time but instead only do the write and read continuously.
Try run the example vi and verify your system setups are correct. You can also use NI-SPY to capture the execution of your code and see where exactly the timeout occured. If you are worriing about the data not being ready when the VISA read happens, you can use a longer timeout value or have a delay before the read starts.

Logical Operations in SQL decode function ?

Hi,
Is it possible to do Logical Operations in SQL decode function
like
'>'
'<'
'>='
'<='
'<>'
not in
in
not null
is null
eg...
select col1 ,order_by,decode ( col1 , > 10 , 0 , 1)
from tab;
select col1 ,order_by,decode ( col1 , <> 10 , 0 , 1)
from tab;
select col1 ,order_by,decode ( col1 , not in (10,11,12) , 0 , 1)
from tab;
select col1 ,order_by,decode ( col1 ,is null , 0 , 1)
from tab;
Regards,
infan
Edited by: user780731 on Apr 30, 2009 12:07 AM
Edited by: user780731 on Apr 30, 2009 12:07 AM
Edited by: user780731 on Apr 30, 2009 12:08 AM
Edited by: user780731 on Apr 30, 2009 12:08 AM
Edited by: user780731 on Apr 30, 2009 12:09 AM

example:
select col1 ,order_by,case when col1 > 10 then 0 else 1 end
from tab;
select col1 ,order_by,case when col1 <> 10 then 0 else 1 end
from tab;
select col1 ,order_by,case when col1 not in (10,11,12) then 0 else 1 end
from tab;As for testing for null, decode handles that by default anyway so you can have decode or case easily..
select col1 ,order_by,decode (col1, null , 0 , 1)
from tab;
select col1 ,order_by,case when col1 is null then 0 else 1 end
from tab;

USING NULL AND SELECT ALL IN DECODE

COL1 has the following values:
COL1
====
A
B
C
A
B
C
A
D
D
SELECT COL1 FROM TABLE1 WHERE COL1 =
DECODE(:VAL1, 'A', 'AA', 'B', 'BB', 'C', 'CC', 'D', 'DD')
1. what about the null values ? how can I add to the above statements when I enter null for the parameter :VAL1
2. what about all the values in COL1, what shall I enter for :VAL1 ?
THANKS.

SELECT COL1 FROM TABLE1
WHERE nvl(COL1,0) = DECODE(:VAL1, 'A', 'AA', 'B', 'BB', 'C', 'CC', 'D', 'DD',null,0)
Can we use in this way?
Shishu Paul
Chandigarh-India

Clearing values from request in decode method

I am using a custom table paginator. In its decode method I have the next code to control whether next link is clicked:
String pLink = (String)requestMap.get("pLink" + clientId);
if ((pLink != null) && (!pLink.equals(""))) {
     if (pLink.equals("next")) {
     } else if (pLink.equals("previous")) {
}But the next sequence produces some problems:
1.     Initial page load.
2.     Click on next link.
3.     Table navigates ok to next page.
4.     Reload page (push F5).
5.     The previous click still remains in the request, so decode method think next link is pressed again.
6.     Application abnormal behaviour arises.
So, I am trying to clear the next_link key from the request, but next code throws an UnsupportedOperationException:
String pLink = (String)requestMap.get("pLink" + clientId);
if ((pLink != null) && (!pLink.equals(""))) {
     if (pLink.equals("next")) {
     } else if (pLink.equals("previous")) {
     requestMap.put("pLink" + clientId, "");
}Do any of you have some ideas?

Hey, where are you RaymondDeCampo, rLubke, BalusC ... the masters of JSF Universe?
;-)

GIF decoding

This works on WinXP but not Linux. Why? It takes the first frame of an animated gif and writes a thumbnail.
 GifDecoder d = new GifDecoder();
 try {
 fis = new FileInputStream(file);
 bis = new BufferedInputStream(fis);
 log.debug("reading gif");
 d.read(bis);
 log.debug("reading framecount");
 int n = d.getFrameCount();
 log.debug("read framecount" + n);
 for (int i = 0; i < 1; i++) {
 BufferedImage frame = d.getFrame(i); // frame i
 int t = d.getDelay(i); // display duration of frame in milliseconds
 log.debug("resizing frame");
 File gifoutputfile = new File("gif" + i + outputthumbFilename);
 BufferedImage bdest = new BufferedImage(60, 60, BufferedImage.TYPE_INT_RGB);
 Graphics2D g = bdest.createGraphics();
 AffineTransform at = AffineTransform.getScaleInstance((double) 60 / frame.getWidth(), (double) 60 / frame.getHeight());
 g.drawRenderedImage(frame, at);
 ImageIO.setUseCache(false);
 ImageIO.write(bdest, "GIF", new File(outputthumbFilename));
 } catch (FileNotFoundException e) {
 e.printStackTrace();
 } catch (IOException e) {
 e.printStackTrace();
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.image.BufferedImage;
import java.awt.image.DataBufferInt;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.ArrayList;
* Class GifDecoder - Decodes a GIF file into one or more frames. 
* <pre>
* Example:
* GifDecoder d = new GifDecoder();
* d.read("sample.gif");
* int n = d.getFrameCount();
* for (int i = 0; i < n; i++) {
* BufferedImage frame = d.getFrame(i); // frame i
* int t = d.getDelay(i); // display duration of frame in milliseconds
* // do something with frame
* </pre>
* No copyright asserted on the source code of this class. May be used for any
* purpose, however, refer to the Unisys LZW patent for any additional
* restrictions. Please forward any corrections to [email protected].
* @author Kevin Weiner, FM Software; LZW decoder adapted from John Cristy's
* ImageMagick.
* @version 1.03 November 2003
public class GifDecoder {
 * File read status: No errors.
public static final int STATUS_OK = 0;
 * File read status: Error decoding file (may be partially decoded)
public static final int STATUS_FORMAT_ERROR = 1;
 * File read status: Unable to open source.
public static final int STATUS_OPEN_ERROR = 2;
protected BufferedInputStream in;
protected int status;
protected int width; // full image width
protected int height; // full image height
protected boolean gctFlag; // global color table used
protected int gctSize; // size of global color table
protected int loopCount = 1; // iterations; 0 = repeat forever
protected int[] gct; // global color table
protected int[] lct; // local color table
protected int[] act; // active color table
protected int bgIndex; // background color index
protected int bgColor; // background color
protected int lastBgColor; // previous bg color
protected int pixelAspect; // pixel aspect ratio
protected boolean lctFlag; // local color table flag
protected boolean interlace; // interlace flag
protected int lctSize; // local color table size
protected int ix, iy, iw, ih; // current image rectangle
protected Rectangle lastRect; // last image rect
protected BufferedImage image; // current frame
protected BufferedImage lastImage; // previous frame
protected byte[] block = new byte[256]; // current data block
protected int blockSize = 0; // block size
// last graphic control extension info
protected int dispose = 0;
// 0=no action; 1=leave in place; 2=restore to bg; 3=restore to prev
protected int lastDispose = 0;
protected boolean transparency = false; // use transparent color
protected int delay = 0; // delay in milliseconds
protected int transIndex; // transparent color index
protected static final int MaxStackSize = 4096;
// max decoder pixel stack size
// LZW decoder working arrays
protected short[] prefix;
protected byte[] suffix;
protected byte[] pixelStack;
protected byte[] pixels;
protected ArrayList frames; // frames read from current file
protected int frameCount;
static class GifFrame {
 public GifFrame(BufferedImage im, int del) {
 image = im;
 delay = del;
 public BufferedImage image;
 public int delay;
 * Gets display duration for specified frame.
 * @param n
 * int index of frame
 * @return delay in milliseconds
public int getDelay(int n) {
 delay = -1;
 if ((n >= 0) && (n < frameCount)) {
 delay = ((GifFrame) frames.get(n)).delay;
 return delay;
 * Gets the number of frames read from file.
 * @return frame count
public int getFrameCount() {
 return frameCount;
 * Gets the first (or only) image read.
 * @return BufferedImage containing first frame, or null if none.
public BufferedImage getImage() {
 return getFrame(0);
 * Gets the "Netscape" iteration count, if any. A count of 0 means repeat
 * indefinitiely.
 * @return iteration count if one was specified, else 1.
public int getLoopCount() {
 return loopCount;
 * Creates new frame image from current data (and previous frames as specified
 * by their disposition codes).
protected void setPixels() {
 // expose destination image's pixels as int array
 int[] dest = ((DataBufferInt) image.getRaster().getDataBuffer()).getData();
 // fill in starting image contents based on last image's dispose code
 if (lastDispose > 0) {
 if (lastDispose == 3) {
 // use image before last
 int n = frameCount - 2;
 if (n > 0) {
 lastImage = getFrame(n - 1);
 } else {
 lastImage = null;
 if (lastImage != null) {
 int[] prev = ((DataBufferInt) lastImage.getRaster().getDataBuffer()).getData();
 System.arraycopy(prev, 0, dest, 0, width * height);
 // copy pixels
 if (lastDispose == 2) {
 // fill last image rect area with background color
 Graphics2D g = image.createGraphics();
 Color c = null;
 if (transparency) {
 c = new Color(0, 0, 0, 0); // assume background is transparent
 } else {
 c = new Color(lastBgColor); // use given background color
 g.setColor(c);
 g.setComposite(AlphaComposite.Src); // replace area
 g.fill(lastRect);
 g.dispose();
 // copy each source line to the appropriate place in the destination
 int pass = 1;
 int inc = 8;
 int iline = 0;
 for (int i = 0; i < ih; i++) {
 int line = i;
 if (interlace) {
 if (iline >= ih) {
 pass++;
 switch (pass) {
 case 2:
 iline = 4;
 break;
 case 3:
 iline = 2;
 inc = 4;
 break;
 case 4:
 iline = 1;
 inc = 2;
 line = iline;
 iline += inc;
 line += iy;
 if (line < height) {
 int k = line * width;
 int dx = k + ix; // start of line in dest
 int dlim = dx + iw; // end of dest line
 if ((k + width) < dlim) {
 dlim = k + width; // past dest edge
 int sx = i * iw; // start of line in source
 while (dx < dlim) {
 // map color and insert in destination
 int index = ((int) pixels[sx++]) & 0xff;
 int c = act[index];
 if (c != 0) {
 dest[dx] = c;
 dx++;
 * Gets the image contents of frame n.
 * @return BufferedImage representation of frame, or null if n is invalid.
public BufferedImage getFrame(int n) {
 BufferedImage im = null;
 if ((n >= 0) && (n < frameCount)) {
 im = ((GifFrame) frames.get(n)).image;
 return im;
 * Gets image size.
 * @return GIF image dimensions
public Dimension getFrameSize() {
 return new Dimension(width, height);
 * Reads GIF image from stream
 * @param BufferedInputStream
 * containing GIF file.
 * @return read status code (0 = no errors)
public int read(BufferedInputStream is) {
 init();
 if (is != null) {
 in = is;
 readHeader();
 if (!err()) {
 readContents();
 if (frameCount < 0) {
 status = STATUS_FORMAT_ERROR;
 } else {
 status = STATUS_OPEN_ERROR;
 try {
 is.close();
 } catch (IOException e) {
 return status;
 * Reads GIF image from stream
 * @param InputStream
 * containing GIF file.
 * @return read status code (0 = no errors)
public int read(InputStream is) {
 init();
 if (is != null) {
 if (!(is instanceof BufferedInputStream))
 is = new BufferedInputStream(is);
 in = (BufferedInputStream) is;
 readHeader();
 if (!err()) {
 readContents();
 if (frameCount < 0) {
 status = STATUS_FORMAT_ERROR;
 } else {
 status = STATUS_OPEN_ERROR;
 try {
 is.close();
 } catch (IOException e) {
 return status;
 * Reads GIF file from specified file/URL source (URL assumed if name contains
 * ":/" or "file:")
 * @param name
 * String containing source
 * @return read status code (0 = no errors)
public int read(String name) {
 status = STATUS_OK;
 try {
 name = name.trim().toLowerCase();
 if ((name.indexOf("file:") >= 0) || (name.indexOf(":/") > 0)) {
 URL url = new URL(name);
 in = new BufferedInputStream(url.openStream());
 } else {
 in = new BufferedInputStream(new FileInputStream(name));
 status = read(in);
 } catch (IOException e) {
 status = STATUS_OPEN_ERROR;
 return status;
 * Decodes LZW image data into pixel array. Adapted from John Cristy's
 * ImageMagick.
protected void decodeImageData() {
 int NullCode = -1;
 int npix = iw * ih;
 int available, clear, code_mask, code_size, end_of_information, in_code, old_code, bits, code, count, i, datum, data_size, first, top, bi, pi;
 if ((pixels == null) || (pixels.length < npix)) {
 pixels = new byte[npix]; // allocate new pixel array
 if (prefix == null)
 prefix = new short[MaxStackSize];
 if (suffix == null)
 suffix = new byte[MaxStackSize];
 if (pixelStack == null)
 pixelStack = new byte[MaxStackSize + 1];
 // Initialize GIF data stream decoder.
 data_size = read();
 clear = 1 << data_size;
 end_of_information = clear + 1;
 available = clear + 2;
 old_code = NullCode;
 code_size = data_size + 1;
 code_mask = (1 << code_size) - 1;
 for (code = 0; code < clear; code++) {
 prefix[code] = 0;
 suffix[code] = (byte) code;
 // Decode GIF pixel stream.
 datum = bits = count = first = top = pi = bi = 0;
 for (i = 0; i < npix;) {
 if (top == 0) {
 if (bits < code_size) {
 // Load bytes until there are enough bits for a code.
 if (count == 0) {
 // Read a new data block.
 count = readBlock();
 if (count <= 0)
 break;
 bi = 0;
 datum += (((int) block[bi]) & 0xff) << bits;
 bits += 8;
 bi++;
 count--;
 continue;
 // Get the next code.
 code = datum & code_mask;
 datum >>= code_size;
 bits -= code_size;
 // Interpret the code
 if ((code > available) || (code == end_of_information))
 break;
 if (code == clear) {
 // Reset decoder.
 code_size = data_size + 1;
 code_mask = (1 << code_size) - 1;
 available = clear + 2;
 old_code = NullCode;
 continue;
 if (old_code == NullCode) {
 pixelStack[top++] = suffix[code];
 old_code = code;
 first = code;
 continue;
 in_code = code;
 if (code == available) {
 pixelStack[top++] = (byte) first;
 code = old_code;
 while (code > clear) {
 pixelStack[top++] = suffix[code];
 code = prefix[code];
 first = ((int) suffix[code]) & 0xff;
 // Add a new string to the string table,
 if (available >= MaxStackSize)
 break;
 pixelStack[top++] = (byte) first;
 prefix[available] = (short) old_code;
 suffix[available] = (byte) first;
 available++;
 if (((available & code_mask) == 0) && (available < MaxStackSize)) {
 code_size++;
 code_mask += available;
 old_code = in_code;
 // Pop a pixel off the pixel stack.
 top--;
 pixels[pi++] = pixelStack[top];
 i++;
 for (i = pi; i < npix; i++) {
 pixels[i] = 0; // clear missing pixels
 * Returns true if an error was encountered during reading/decoding
protected boolean err() {
 return status != STATUS_OK;
 * Initializes or re-initializes reader
protected void init() {
 status = STATUS_OK;
 frameCount = 0;
 frames = new ArrayList();
 gct = null;
 lct = null;
 * Reads a single byte from the input stream.
protected int read() {
 int curByte = 0;
 try {
 curByte = in.read();
 } catch (IOException e) {
 status = STATUS_FORMAT_ERROR;
 return curByte;
 * Reads next variable length block from input.
 * @return number of bytes stored in "buffer"
protected int readBlock() {
 blockSize = read();
 int n = 0;
 if (blockSize > 0) {
 try {
 int count = 0;
 while (n < blockSize) {
 count = in.read(block, n, blockSize - n);
 if (count == -1)
 break;
 n += count;
 } catch (IOException e) {
 if (n < blockSize) {
 status = STATUS_FORMAT_ERROR;
 return n;
 * Reads color table as 256 RGB integer values
 * @param ncolors
 * int number of colors to read
 * @return int array containing 256 colors (packed ARGB with full alpha)
protected int[] readColorTable(int ncolors) {
 int nbytes = 3 * ncolors;
 int[] tab = null;
 byte[] c = new byte[nbytes];
 int n = 0;
 try {
 n = in.read(c);
 } catch (IOException e) {
 if (n < nbytes) {
 status = STATUS_FORMAT_ERROR;
 } else {
 tab = new int[256]; // max size to avoid bounds checks
 int i = 0;
 int j = 0;
 while (i < ncolors) {
 int r = ((int) c[j++]) & 0xff;
 int g = ((int) c[j++]) & 0xff;
 int b = ((int) c[j++]) & 0xff;
 tab[i++] = 0xff000000 | (r << 16) | (g << 8) | b;
 return tab;
 * Main file parser. Reads GIF content blocks.
protected void readContents() {
 // read GIF file content blocks
 boolean done = false;
 while (!(done || err())) {
 int code = read();
 switch (code) {
 case 0x2C: // image separator
 readImage();
 break;
 case 0x21: // extension
 code = read();
 switch (code) {
 case 0xf9: // graphics control extension
 readGraphicControlExt();
 break;
 case 0xff: // application extension
 readBlock();
 String app = "";
 for (int i = 0; i < 11; i++) {
 app += (char) block;
if (app.equals("NETSCAPE2.0")) {
readNetscapeExt();
} else
skip(); // don't care
break;
default: // uninteresting extension
skip();
break;
case 0x3b: // terminator
done = true;
break;
case 0x00: // bad byte, but keep going and see what happens
break;
default:
status = STATUS_FORMAT_ERROR;
* Reads Graphics Control Extension values
protected void readGraphicControlExt() {
read(); // block size
int packed = read(); // packed fields
dispose = (packed & 0x1c) >> 2; // disposal method
if (dispose == 0) {
dispose = 1; // elect to keep old image if discretionary
transparency = (packed & 1) != 0;
delay = readShort() * 10; // delay in milliseconds
transIndex = read(); // transparent color index
read(); // block terminator
* Reads GIF file header information.
protected void readHeader() {
String id = "";
for (int i = 0; i < 6; i++) {
id += (char) read();
if (!id.startsWith("GIF")) {
status = STATUS_FORMAT_ERROR;
return;
readLSD();
if (gctFlag && !err()) {
gct = readColorTable(gctSize);
bgColor = gct[bgIndex];
* Reads next frame image
protected void readImage() {
ix = readShort(); // (sub)image position & size
iy = readShort();
iw = readShort();
ih = readShort();
int packed = read();
lctFlag = (packed & 0x80) != 0; // 1 - local color table flag
interlace = (packed & 0x40) != 0; // 2 - interlace flag
// 3 - sort flag
// 4-5 - reserved
lctSize = 2 << (packed & 7); // 6-8 - local color table size
if (lctFlag) {
lct = readColorTable(lctSize); // read table
act = lct; // make local table active
} else {
act = gct; // make global table active
if (bgIndex == transIndex)
bgColor = 0;
int save = 0;
if (transparency) {
save = act[transIndex];
act[transIndex] = 0; // set transparent color if specified
if (act == null) {
status = STATUS_FORMAT_ERROR; // no color table defined
if (err())
return;
decodeImageData(); // decode pixel data
skip();
if (err())
return;
frameCount++;
// create new image to receive frame data
image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB_PRE);
setPixels(); // transfer pixel data to image
frames.add(new GifFrame(image, delay)); // add image to frame list
if (transparency) {
act[transIndex] = save;
resetFrame();
* Reads Logical Screen Descriptor
protected void readLSD() {
// logical screen size
width = readShort();
height = readShort();
// packed fields
int packed = read();
gctFlag = (packed & 0x80) != 0; // 1 : global color table flag
// 2-4 : color resolution
// 5 : gct sort flag
gctSize = 2 << (packed & 7); // 6-8 : gct size
bgIndex = read(); // background color index
pixelAspect = read(); // pixel aspect ratio
* Reads Netscape extenstion to obtain iteration count
protected void readNetscapeExt() {
do {
readBlock();
if (block[0] == 1) {
// loop count sub-block
int b1 = ((int) block[1]) & 0xff;
int b2 = ((int) block[2]) & 0xff;
loopCount = (b2 << 8) | b1;
} while ((blockSize > 0) && !err());
* Reads next 16-bit value, LSB first
protected int readShort() {
// read 16-bit value, LSB first
return read() | (read() << 8);
* Resets frame state for reading next image.
protected void resetFrame() {
lastDispose = dispose;
lastRect = new Rectangle(ix, iy, iw, ih);
lastImage = image;
lastBgColor = bgColor;
int dispose = 0;
boolean transparency = false;
int delay = 0;
lct = null;
* Skips variable length blocks up to and including next zero length block.
protected void skip() {
do {
readBlock();
} while ((blockSize > 0) && !err());


Niklas wrote:
This works on WinXP but not Linux. Why? Please don't just post reams of code without providing more context and information.
How is it failing on Linux? Wrong results? What are they? Error messages? What do they say? You need to give us some place to start looking.

Who can decode this who ever can I will give 4 dukes cause thats all i have

who ever is the first to decode this and tell me what it says I will give you 4 duke dollars since that is all I have here it is
vs.vo.~

seeing something
vszz}.vss

SQL Expression in decode function or case statement?

Can I put SQL expressions in decode function or case statement?
For example,
select le.profile, decode( select count(1) from profile_data where NAME= 'XXXX_AFTER' and object_id = le.profile, 0, 'N', 'Y')
from element le;
or
select le.profile, case WHEN ( select count(1) from profile_data where NAME= 'XXXX_AFTER' and object_id = le.profile) = 0 THEN 'N'
ELSE 'Y'
from element le;
None of the above work.
Can anyone tell me how to make it work?
Is there any workaround?
Thanks,
J

You simply needed and END to your CASE statement;
SQL> with profile_data as (
   select 'XXXX_AFTER' name, 1 object_id from dual),
     element as (
   select 1 profile from dual union all
   select 2 from dual)
select le.profile,
   case WHEN ( select count(1) from profile_data where NAME= 'XXXX_AFTER' and object_id = le.profile) = 0
   THEN 'N'
   ELSE 'Y'
   END new_col
from element le
   PROFILE N
         1 Y
         2 N

Decode help in SQL function

Hi,
I'm writing an HTMLDB application that we will be using to track the number of hours that we put into a project (all projects), and I've got a routine that returns the number of hours that are possible within a given month M-F 8 hours a day. I use this value returned to indicate how many hours have been enterered.
SELECT null link, 'Still Unrecorded' itsrdescr,trueworkdays(:P80_START,:P80_END)*8-(select sum(hoursworked) ihoursworked from workdetail wd, breakdowns b
WHERE wd.workdetailid = b.itsrnum and b.oid = upper(:P80_DEVELOPER) and dateworked between :P80_START and :P80_END) hoursworked
from dual
UNION
SELECT null link, wd.itsrdescr,sum(b.hoursworked) hoursworked
FROM workdetail wd, breakdowns b
WHERE wd.workdetailid = b.itsrnum and b.oid = upper(:P80_DEVELOPER) and dateworked between :P80_START and :P80_END
GROUP by wd.itsrdescr
ORDER by hoursworked desc
What I'm wanting is something along the lines of this:
SELECT null link, 'Still Unrecorded' itsrdescr,decode((trueworkdays(:P80_START,:P80_END)*8-(select sum(hoursworked) ihoursworked from workdetail wd, breakdowns b
WHERE wd.workdetailid = b.itsrnum and b.oid = upper(:P80_DEVELOPER) and dateworked between :P80_START and :P80_END)),<0,0,?????????) hoursworked
from dual
UNION
SELECT null link, wd.itsrdescr,sum(b.hoursworked) hoursworked
FROM workdetail wd, breakdowns b
WHERE wd.workdetailid = b.itsrnum and b.oid = upper(:P80_DEVELOPER) and dateworked between :P80_START and :P80_END
GROUP by wd.itsrdescr
ORDER by hoursworked desc
which will include a decode statement to let me know when the value getting returned into hoursworked on that first column is less than zero which throws off the chart. In this particular case, it has a value of -6 which makes all my percentages go haywire. How would one code this statement to include a decode statement to find out if that sum is returning a negative number?
Hope this made sense,
TIA,
cliff

Hey Tyler,
Actually.... It kinda killed the server. I'm trying to figure out a way to get the following functionality in a different way. Here is the way that the query turned out using the case statement.
SELECT null link, 'Still Unrecorded' itsrdescr,
(case
when (trueworkdays(:P80_START,:P80_END)*8-(select sum(hoursworked) ihoursworked from workdetail wd, breakdowns b
WHERE wd.workdetailid = b.itsrnum and b.oid = upper(:P80_DEVELOPER) and dateworked between :P80_START and :P80_END)) < 0 then 0
else
(trueworkdays(:P80_START,:P80_END)*8-(select sum(hoursworked) ihoursworked from workdetail wd, breakdowns b
WHERE wd.workdetailid = b.itsrnum and b.oid = upper(:P80_DEVELOPER) and dateworked between :P80_START and :P80_END))
end) hoursworked
from dual
UNION
SELECT null link, wd.itsrdescr,sum(b.hoursworked) hoursworked
FROM workdetail wd, breakdowns b
WHERE wd.workdetailid = b.itsrnum and b.oid = upper(:P80_DEVELOPER) and dateworked between :P80_START and :P80_END
GROUP by wd.itsrdescr
ORDER by hoursworked desc
Any tips on what I could do to get the above functionality without killing my server.
Thx for the input
cliff

SQL DECODE function

Oracle version: 9.2.0.1.0
Procob version: 9.2.0.1.0
Cobol version: 3.1.11
O.S. version: Windows XP
We have a pro*cobol file with the next conversion rule into a select defined with a cursor.
NVL(TO_CHAR(A.F_ALTA,'YYYYMMDD'),' '),
NVL(TO_CHAR(A.F_ESTADO,'YYYYMMDD'),' '),
we store the result data through a fetch of the cursor into two variables (W-F-ALTA and W-F-ESTADO) When the program executes an insert of these two values in a target table, we define the next conversion rule:
TO_DATE(DECODE(:W-F-ALTA,' ',NULL,:W-F-ALTA),'YYYYMMDD'),
TO_DATE(DECODE(:W-F-ESTADO,' ',NULL,:W-F-ESTADO),'YYYYMMDD')
Pro*Cobol and Cobol does not have errors when we precompile and compile the program but, when we execute the generated exe file, Oracle displays the next error:
ORA-01841 (full) year must be between -4713 and +9999, and not be 0
We think that the DECODE function is not understood by the cobol or pro*cobol interpreter. If we execute the same code without the DECODE function (only with TO_DATE function) there is no errors in the execution of the program
somebody knows if there are reported problems with this DECODE function in Pro*Cobol or Cobol and how to solve them?
Thanks

TO_DATE(DECODE(:W-F-ALTA,' ',NULL,:W-F-ALTA),'YYYYMMDD'),
TO_DATE(DECODE(:W-F-ESTADO,' ',NULL,:W-F-ESTADO),'YYYYMMDD')The problem is with the input values of :W-F-ALTA and :W-F-ESTADO. Using the first line as an example, what you are saying is if :W-F-ALTA is ' ', substitute it with NULL, any other value should be :W-F-ALTA, then output the TO_DATE value of whatever the result is.
So if the value of :W-F-ALTA is the wrong charater or in the wrong input format, TO_DATE function does not understand it.
See examples of success and failures below with your Bind variables substituted with typical values.
SQL> select TO_DATE(DECODE(' ',' ',NULL,'20060830'),'YYYYMMDD') from dual;
TO_DATE(D
SQL> select TO_DATE(DECODE('1999-01-01',' ','NULL','20060830'),'YYYYMMDD') from dual;
TO_DATE(D
30-AUG-06
SQL> select TO_DATE(DECODE('SHOULD_ERROR',' ','NULL','SHOULD_ERROR'),'YYYYMMDD') from dual;
select TO_DATE(DECODE('SHOULD_ERROR',' ','NULL','SHOULD_ERROR'),'YYYYMMDD') from dual
ERROR at line 1:
ORA-01841: (full) year must be between -4713 and +9999, and not be 0
SQL> select TO_DATE(DECODE('20060830',' ','NULL','20060830'),'YYYYMMDD') from dual;
TO_DATE(D
30-AUG-06
SQL> select TO_DATE(DECODE('12345678',' ','NULL','12345678'),'YYYYMMDD') from dual;
select TO_DATE(DECODE('12345678',' ','NULL','12345678'),'YYYYMMDD') from dual
ERROR at line 1:
ORA-01843: not a valid month
SQL>

Problem using DECODE() function with a Query of Queries

I
posted
on my blog about an issue I was having trying to use the PL/SQL
DECODE() function with a Coldfusion Query of Queries. This function
works fine when you query a database for information. However, when
you query another query, it seems that CF doesn't recognize it. I
got errors stating that it found a left parenthesis where it
expected a FROM key word. Here is a simplified version of what I am
trying to do:
quote:

<cfscript>
qOriginal = queryNew("Name,Email,CountryCode",
"VarChar,VarChar,VarChar");
newRow = queryAddRow(qOriginal, 5);
querySetCell(qOriginal, "Name", "Joe", 1);
querySetCell(qOriginal, "Email", "[email protected]", 1);
querySetCell(qOriginal, "CountryCode", "AMER", 1);
querySetCell(qOriginal, "Name", "Sally", 2);
querySetCell(qOriginal, "Email", "[email protected]", 2);
querySetCell(qOriginal, "CountryCode", "AMER", 2);
querySetCell(qOriginal, "Name", "Bob", 3);
querySetCell(qOriginal, "Email", "[email protected]", 3);
querySetCell(qOriginal, "CountryCode", "ASIA", 3);
querySetCell(qOriginal, "Name", "Mary", 4);
querySetCell(qOriginal, "Email", "[email protected]", 4);
querySetCell(qOriginal, "CountryCode", "EURO", 4);
querySetCell(qOriginal, "Name", "John", 5);
querySetCell(qOriginal, "Email", "[email protected]", 5);
querySetCell(qOriginal, "CountryCode", "EURO", 5);
</cfscript>
<cfquery name="qCountries" dbtype="query">
SELECT DISTINCT(CountryCode) AS CountryCode,
DECODE(states, "AMER", "North America & Canada",
"EURO", "Europe & Africa", "ASIA", "Japan &
Asia","") CountryName
FROM qOriginal
ORDER BY CountryCode
</cfquery>
<cfdump var="#qCountries#">

So running this returned the following error:
Query Of Queries syntax error.
Encountered "(. Incorrect Select Statement, Expecting a
'FROM', but encountered '(' instead, A select statement should have
a 'FROM' construct.
Does anybody know why this doesn't work? Is it just not
supported? Please note that I have also tried to use the CASE()
function instead of DECODE() and that resulted in basically the
same error. For now I an looping over my distinct query with a
switch statement and manually loading a new query with the data how
I want it. But it would be a lot cleaner and less code to have the
DECODE() to work. Thx!

DECODE() is an Oracle function, not generic SQL. Q-of-Q is a
very limited subset of SQL and lacks many functions and clauses
available in standard SQL, especially what you may be used to using
in your particular RDBMS.
See
Query
of Queries user guide
Phil

Regarding decode function

Hi all,
i want to know abt decode function in oracle-sql
i..e passing the parameters in decode using decode using ":" bind parameter
select JOB, decode(:j,'CLERK','MANAGER','ANALYST','EXEC',JOB) FROM EMP;
i declared the j variable in sql environment
VARIABLE J VARCHAR2(20);
i exec the query
and passed as the clerk as input parameter
but iam getting the o/p as
JOB DECODE(:J
MANAGER MANAGER
MANAGER MANAGER
MANAGER MANAGER
SALESMAN SALESMAN
SALESMAN SALESMAN
SALESMAN SALESMAN
CLERK CLERK
SALESMAN SALESMAN
ANALYST ANALYST
CLERK CLERK
ANALYST ANALYST
JOB DECODE(:J
CLERK CLERK
12 rows selected.
SQL> PRINT J;
J
im not getting o/p
so please hlelp me only : should be used not &
this is my first thread.
execuse me if any mistakes
tons of thanks in advance to all

SORRY DAVE,ROD FOR NOT BEING CLEAR,
IAM WORKING WITH EMP TABLE THE DATA IN IT IS LIKE THIS
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30
7782 CLARK MANAGER 7839 09-JUN-81 2450 10
7566 JONES MANAGER 7839 02-APR-81 2975 20
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30
7499 chaitu SALESMAN 7698 20-FEB-81 1600 300 10
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30
7900 JAMES CLERK 7698 03-DEC-81 950 30
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30
7902 FORD ANALYST 7566 03-DEC-81 3000 20
7369 SMITH CLERK 7902 17-DEC-80 800 20
7788 SCOTT ANALYST 7566 09-DEC-82 3000 20
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
7876 ADAMS CLERK 7788 12-JAN-83 1100 20
AND I USED DECODE FUNCTION
select JOB BEFOREPROMOTION, decode(job,'CLERK','MANAGER','ANALYST','EXEC') PROMOTION FROM EMP
BEFOREPRO PROMOTI
MANAGER
MANAGER
MANAGER
SALESMAN
SALESMAN
SALESMAN
CLERK MANAGER
SALESMAN
ANALYST EXEC
CLERK MANAGER
ANALYST EXEC
I..E ALL THE CLERKS TO MANAGERS AND SAME THING WITH ANALYST
OK
NOW I WILL SHOW U ANOTHER QUERY
select job,decode(job,'CLERK','MANAGER','ANALYST','EXEC',JOB) FROM EMP where job=&job;
Enter value for job: 'CLERK'
old 1: select job,decode(job,'CLERK','MANAGER','ANALYST','EXEC',JOB) FROM EMP where job=&job
new 1: select job,decode(job,'CLERK','MANAGER','ANALYST','EXEC',JOB) FROM EMP where job='CLERK'
JOB DECODE(JO
CLERK MANAGER
CLERK MANAGER
CLERK MANAGER
HERE OBSERVE THAT I PASSED JOB ='CLERKS AS PARAMETER AFTER EXECUTING THE QUERY
IT ASKED LIKE THIS AND SHOWED THE REPLACED VALUES
Enter value for job: 'CLERK'
AS SHOWN ABOVE
FOR THIS TO PASS VALUE
IN TO THE QUERY BY USING AMPERSAND('&')
TO TAKE INPUT AS CLERK
IT CHECKED AND RETURNED THE VALUE
IN THE SIMILAR WAY CAN I USE ":" COLON
TO PASS PARAMETERS
IN TO THE QUERY
CAN I USE IT
REGARDS,
PHANI
Edited by: user10652894 on Nov 26, 2008 3:24 AM

Ptz decoder rs232

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