source: BAORadio/libindi/v1.0.1/examples/tutorial_ccdpreview.c@ 678

Last change on this file since 678 was 490, checked in by campagne, 15 years ago

import libindi (JEC)
File size: 12.0 KB
Line 
1/*
2 INDI Developers Manual
3 Tutorial CCDPreview
4
5 "CCD Preview"
6
7 In this tutorial, demostrate the ccdpreview feature, and simulate the readout of a CCD camera.
8
9 Refer to README, which contains instruction on how to build this driver, and use it
10 with an INDI-compatible client.
11
12 For use with Kstars: click "Connect"; click "ON"; click "Start"
13
14*/
15
16#include <stdio.h>
17#include <stdlib.h>
18#include <string.h>
19#include <stdarg.h>
20#include <math.h>
21#include <unistd.h>
22#include <time.h>
23#include <fcntl.h>
24#include <signal.h>
25#include <errno.h>
26#include <sys/stat.h>
27#include <sys/types.h>
28#include <sys/socket.h>
29#include <netinet/in.h>
30#include <netdb.h>
31#include <zlib.h>
32#include <math.h>
33
34/* INDI Core headers */
35#include "indidevapi.h"
36#include "indicom.h"
37#include "eventloop.h"
38#include "base64.h"
39
40#define mydev "Device with Data Transfer"
41#define IMAGE_CONTROL "Image Control"
42#define COMM_GROUP "Main Control"
43#define IMAGE_GROUP "Image Settings"
44#define POLLMS 100
45#define WIDTH ((int) CtrlN[0].value)
46#define HEIGHT ((int) CtrlN[1].value)
47#define BYTESPERPIX ((int) CtrlN[3].value)
48#define BYTEORDER ((int) CtrlN[4].value)
49#define FWHMPIX (CCDInfoN[0].value)
50#define FOCUS (FocusN[0].value)
51
52void uploadStream(uLong maxBytes);
53void readoutSim();
54void makepic();
55
56/*INDI controls */
57
58/* These properties with these names are required display a video stream*/
59static ISwitch PowerS[] = {{"CONNECT" , "Connect" , ISS_OFF, 0, 0},{"DISCONNECT", "Disconnect", ISS_ON, 0, 0}};
60static ISwitchVectorProperty PowerSP = { mydev, "CONNECTION" , "Connection", COMM_GROUP, IP_RW, ISR_1OFMANY, 60, IPS_IDLE, PowerS, NARRAY(PowerS), "", 0};
61static ISwitch StreamS[2]={{ "ON", "", ISS_OFF},{"OFF", "", ISS_ON}};
62static ISwitchVectorProperty StreamSP={mydev, "CCDPREVIEW_STREAM", "Video Stream", COMM_GROUP, IP_RW, ISR_1OFMANY, 0, IPS_IDLE,StreamS, NARRAY(StreamS),"",0};
63static INumber CtrlN[] = {{"WIDTH", "Width", "%0.f",16., 512., 16., 256.},
64 {"HEIGHT", "Height", "%0.f", 16., 512., 16., 256.},{"MAXGOODDATA", "max. good data value", "%0.f", 1., 256.0*256.0*256.0*256.0, 0., 30000.},
65 {"BYTESPERPIXEL", "Bytes/pix", "%0.f", 1., 4., 1., 2.},{"BYTEORDER", "Byte Order", "%0.f", 1., 2., 1., 2.}};
66static INumberVectorProperty CtrlNP = {mydev , "CCDPREVIEW_CTRL", "Image Size", COMM_GROUP, IP_RW, 60, IPS_IDLE,CtrlN, NARRAY(CtrlN),"",0};
67/* These properties with these names are required by the indi client to calculate the FWHM in arcsec*/
68/* The FWHM here is in units of pixels. The Pixelsize here is in units of microns. */
69static INumber CCDInfoN[] = {{"CCD_FWHM_PIXEL", "FWHM[pix]", "%0.2f",0., 100., 1., 3.},
70 {"CCD_PIXEL_SIZE", "Pixelsize[mu]", "%0.1f",0., 100., 1., 15.5}};
71static INumberVectorProperty CCDInfoNP = {mydev , "CCD_INFO", "CCD Info", COMM_GROUP, IP_RO, 60, IPS_IDLE,CCDInfoN, NARRAY(CCDInfoN),"",0};
72
73
74
75/* Blob for sending image (required but the names can be chosen freely)*/
76static IBLOB imageB = {"CCD1", "Feed", "", 0, 0, 0, 0, 0, 0, 0};
77static IBLOBVectorProperty imageBP = {mydev, "Video", "Video", COMM_GROUP,
78 IP_RO, 0, IPS_IDLE, &imageB, 1, "", 0};
79
80/* Start / Stop Switch (not required, and only defined in this specific driver)*/
81static ISwitch ReadoutS[2]={{ "Start", "", ISS_OFF},{"Stop", "", ISS_ON}};
82static ISwitchVectorProperty ReadoutSP={mydev, "readout", "Readout", COMM_GROUP, IP_RW, ISR_1OFMANY, 0, IPS_IDLE,ReadoutS, NARRAY(ReadoutS),"",0};
83/* Adjustable Focus (not required, and only defined in this specific driver)*/
84static INumber FocusN[] = {{"Focus", "Focus", "%0.f",0., 100., 1., 40.}};
85static INumberVectorProperty FocusNP = {mydev , "Telescope", "Telescope", COMM_GROUP, IP_RW, 60, IPS_IDLE,FocusN, NARRAY(FocusN),"",0};
86
87
88/* 1 if "readout simulation" is running, 0 otherwise*/
89volatile int readout_is_running=0;
90/* The number of bytes read from the "virtual CCD" up to now */
91volatile uLong readout_bytes_done=0;
92/* 1 if readout simulation is aked to stop, 0 otherwise*/
93volatile uLong readout_stop=0 ;
94
95/* a buffer to hold a 16 bit image to be displayed*/
96unsigned char *image;
97
98/* in this tutorial we simply calculate the FWHM from the focus-position
99 in a real driver you will have calculate from the FWHM from the image you
100 took with your CCD. For example you can write a fitsfile and use
101 sextractor (sextractor.sourceforge.net) to make a list of all detected
102 objects with their "FWHM_WORLD" parameters and take the median of
103 that list. But make your FWHM is in units of pixels.
104*/
105double fwhm()
106{
107 return 0.3*sqrt((FOCUS-50.0)*(FOCUS-50.0))+1.0;
108}
109
110/* Initlization routine */
111static void readout_start()
112{
113 if (readout_is_running!=0)
114 return;
115
116 /* start timer to simulate CCD readout
117 The timer will call function previewSim after POLLMS milliseconds */
118 image=malloc(WIDTH*HEIGHT*BYTESPERPIX);
119 readout_bytes_done=0;
120 readout_stop=0;
121 readout_is_running = 1;
122 CtrlNP.s=IPS_OK;
123 IDSetNumber(&CtrlNP, NULL);
124 makepic();
125 IEAddTimer (POLLMS, readoutSim, NULL);
126}
127
128
129void ISGetProperties (const char *dev)
130{
131
132 if (dev && strcmp (mydev, dev))
133 return;
134
135 IDDefSwitch(&StreamSP, NULL);
136 IDDefSwitch(&ReadoutSP, NULL);
137 IDDefSwitch(&PowerSP, NULL);
138 IDDefNumber(&CtrlNP, NULL);
139 IDDefNumber(&FocusNP, NULL);
140 IDDefNumber(&CCDInfoNP, NULL);
141 FocusNP.s=IPS_OK;
142 IDSetNumber(&FocusNP, NULL);
143 CCDInfoNP.s=IPS_OK;
144 IDSetNumber(&CCDInfoNP, NULL);
145 CtrlNP.s=IPS_OK;
146 IDSetNumber(&CtrlNP, NULL);
147 IDDefBLOB(&imageBP, NULL);
148
149}
150
151void ISNewBLOB (const char *dev, const char *name, int sizes[], char *blobs[], char *formats[], char *names[], int n)
152{
153
154 /* ignore if not ours */
155 if (dev && strcmp (mydev, dev))
156 return;
157
158 /* suppress warning */
159 n=n; dev=dev; name=name; names=names;
160
161}
162
163void ISNewSwitch (const char *dev, const char *name, ISState *states, char *names[], int n)
164{
165
166 /* ignore if not ours */
167 if (dev && strcmp (dev, mydev))
168 return;
169
170 /* Connection */
171 if (!strcmp (name, PowerSP.name))
172 {
173 IUUpdateSwitches(&PowerSP, states, names, n);
174 PowerSP.s = IPS_OK;
175 IDSetSwitch(&PowerSP, NULL);
176 return;
177 }
178
179 if (!strcmp (name, StreamSP.name))
180 {
181 IUUpdateSwitches(&StreamSP, states, names, n);
182 StreamSP.s = IPS_OK;
183 IDSetSwitch(&StreamSP, NULL);
184 return;
185 }
186
187 /* Readout start/stop*/
188 if (!strcmp (name, ReadoutSP.name))
189 {
190 IUUpdateSwitches(&ReadoutSP, states, names, n);
191 if (ReadoutS[0].s==ISS_ON) {
192 readout_start();
193 }
194 if (ReadoutS[1].s==ISS_ON) {
195 readout_stop=1;
196 }
197 ReadoutSP.s = IPS_OK;
198 IDSetSwitch(&ReadoutSP, NULL);
199 return;
200 }
201}
202
203void ISNewText (const char *dev, const char *name, char *texts[], char *names[], int n)
204{
205
206 /* ignore if not ours */
207 if (dev && strcmp (mydev, dev))
208 return;
209
210 /* suppress warning */
211 n=n; dev=dev; name=name; names=names; texts=texts;
212
213}
214
215
216void ISNewNumber (const char *dev, const char *name, double values[], char *names[], int n)
217{
218 /* ignore if not ours */
219 if (dev && strcmp (mydev, dev))
220 return;
221
222 /* suppress warning */
223 n=n; dev=dev; name=name; names=names;
224
225 if (!strcmp (name, CtrlNP.name)) {
226 if (readout_is_running==0) {
227 IUUpdateNumbers(&CtrlNP, values, names, n);
228 }
229 else {
230 IDMessage (mydev, "The Parameters can not be change during readout\n");
231 }
232 CtrlNP.s=IPS_OK;
233 IDSetNumber(&CtrlNP, NULL);
234 }
235 if (!strcmp (name, FocusNP.name)) {
236 if (readout_is_running==0) {
237 IUUpdateNumbers(&FocusNP, values, names, n);
238 }
239 else {
240 IDMessage (mydev, "The Parameters can not be change during readout\n");
241 }
242 FocusNP.s=IPS_OK;
243 IDSetNumber(&FocusNP, NULL);
244 }
245}
246
247
248void uploadStream(uLong maxBytes)
249{
250
251 unsigned char *Data, *compressedData;
252 int r=0,offs=0;
253 unsigned int i =0;
254 unsigned char j;
255 static uLong old_maxBytes, sendBytes;
256 uLongf compressedBytes=0;
257 uLong totalBytes;
258 /* #0 Allocate buffer*/
259 totalBytes = WIDTH*HEIGHT*BYTESPERPIX;
260 Data = (unsigned char *) malloc (sizeof(unsigned char) * totalBytes);
261 compressedData = (unsigned char *) malloc (sizeof(unsigned char) * totalBytes + totalBytes / 64 + 16 + 3);
262 if (Data == NULL || compressedData == NULL)
263 {
264 IDLog("Error! low memory. Unable to initialize fits buffers.\n");
265 return;
266 }
267 if (maxBytes<old_maxBytes) {
268 old_maxBytes=0;
269 }
270
271 /* #1 fill transferbuffer ("Data") with data read from the imagebuffer ("image")*/
272 if (maxBytes>totalBytes) {
273 maxBytes=totalBytes;
274 }
275 j=0;
276 for (i=old_maxBytes; i < maxBytes; i+= 1) {
277 if (BYTEORDER==1) {
278 Data[i-old_maxBytes]=image[i];
279 }
280 if (BYTEORDER==2) {
281 if (i%(2*BYTESPERPIX)==0) {
282 offs=i/2;
283 }
284 if ((i%(2*BYTESPERPIX))<BYTESPERPIX) {
285 Data[i-old_maxBytes]=image[i-offs];
286 }
287 else {
288 Data[i-old_maxBytes]=image[WIDTH*HEIGHT*BYTESPERPIX-(i-offs)];
289 }
290 }
291 }
292 sendBytes=maxBytes-old_maxBytes;
293 compressedBytes = sizeof(char) * sendBytes + sendBytes / 64 + 16 + 3;
294
295 /* #2 Compress it */
296 r = compress2(compressedData, &compressedBytes, Data, sendBytes, 9);
297 if (r != Z_OK)
298 {
299 /* this should NEVER happen */
300 IDLog("internal error - compression failed: %d\n", r);
301 return;
302 }
303 /* #3 Send it */
304 imageB.blob = compressedData;
305 imageB.bloblen = compressedBytes;
306 imageB.size = sendBytes;
307 strcpy(imageB.format, ".ccdpreview.z");
308 imageBP.s = IPS_OK;
309 IDSetBLOB (&imageBP, NULL);
310 free (Data);
311 free (compressedData);
312 old_maxBytes=maxBytes;
313
314}
315
316
317/* readout the "virtual CCD" over time*/
318void readoutSim (void *p)
319{
320 readout_bytes_done+=WIDTH*BYTESPERPIX*8;
321 uploadStream(readout_bytes_done);
322 /* again */
323 if ((readout_bytes_done<WIDTH*HEIGHT*BYTESPERPIX)&&(readout_stop==0)) {
324 IEAddTimer (POLLMS, readoutSim, NULL);
325 }
326 else {
327 /* Here you should calculate the fwhm from your image*/
328 FWHMPIX=fwhm();
329 free(image);
330 CCDInfoNP.s=IPS_OK;
331 IDSetNumber(&CCDInfoNP, NULL);
332 readout_is_running=0;
333 }
334}
335
336/* Writes a simulated star to the image buffer*/
337void makestar(int x, int y, unsigned long f,int boxsize,double fwhm)
338{
339 int i,j,b;
340 unsigned long val;
341 float rr;
342 for (i=x-boxsize/2;i<x+boxsize/2;i++){
343 for (j=y-boxsize/2;j<y+boxsize/2;j++){
344 if ((i<0)||(j<0)||(i>WIDTH-1)||(j>HEIGHT-1)) {
345 continue;
346 }
347 rr=exp(-2.0*0.7*((x-i)*(x-i)+(y-j)*(y-j))/(fwhm*fwhm));
348 val=0;
349 for (b=0;b<BYTESPERPIX;b++) {
350 val+=(unsigned long) image[BYTESPERPIX*i+WIDTH*BYTESPERPIX*j+b]*pow(256.0,b);
351 }
352 val+=f*rr;
353 if (BYTESPERPIX==1) {
354 val=val/256;
355 }
356 for (b=0;b<BYTESPERPIX;b++) {
357 image[BYTESPERPIX*i+WIDTH*BYTESPERPIX*j+b]=val % 256;
358 val=(val-(val % 256))/256;
359 }
360 }
361 }
362}
363
364/*Write a simulated bias with readout noise to the image buffer */
365void makebias(unsigned long bias,unsigned long noise)
366{
367 int i,j,b;
368 unsigned long val;
369 for (i=0;i<WIDTH;i+=1){
370 for (j=0;j<HEIGHT;j+=1){
371 val=bias;
372 val+=(unsigned long) (noise*(rand()/(1.0*RAND_MAX)));
373 if (BYTESPERPIX==1) {
374 val=val/256;
375 }
376 for (b=0;b<BYTESPERPIX;b++) {
377 image[BYTESPERPIX*i+WIDTH*BYTESPERPIX*j+b]=val % 256;
378 val=(val-(val % 256))/256;
379 }
380 }
381 }
382}
383
384/*Fill the image buffer with some pseudoastronimical data*/
385void makepic()
386{
387 unsigned long i,x,y,b;
388 double rr;
389 makebias(200,6);
390 /*some faint stars*/
391 for (i=1;i<50;i++) {
392 x=(int) ((WIDTH-1)*(rand()/(1.0*RAND_MAX)));
393 y=(int) ((HEIGHT-1)*(rand()/(1.0*RAND_MAX)));
394 rr=pow((rand()/(1.0*RAND_MAX)),2.0)+pow((rand()/(1.0*RAND_MAX)),2.0)
395 +pow((rand()/(1.0*RAND_MAX)),2.0);
396 rr*=10;
397 b=(int) (10000.0/(rr+1));
398 makestar(x,y,b,3*fwhm(),fwhm());
399 }
400 /*some bright stars*/
401 for (i=1;i<50;i++) {
402 x=(int) ((WIDTH-1)*(rand()/(1.0*RAND_MAX)));
403 y=(int) ((HEIGHT-1)*(rand()/(1.0*RAND_MAX)));
404 rr=pow((rand()/(1.0*RAND_MAX)),2.0)+pow((rand()/(1.0*RAND_MAX)),2.0)
405 +pow((rand()/(1.0*RAND_MAX)),2.0);
406 rr*=10;
407 b=(unsigned long) (10000.0/(rr+1));
408 if (BYTESPERPIX>1) {
409 b=(unsigned long) b*(pow(256.0,BYTESPERPIX-2.0));
410 }
411 makestar(x,y,b,3*fwhm(),fwhm() );
412 }
413 /*some stars of defined brightness */
414 for (i=1;i<3;i++) {
415 x=(int) ((WIDTH-1)*(rand()/(1.0*RAND_MAX)));
416 y=(int) ((HEIGHT-1)*(rand()/(1.0*RAND_MAX)));
417 b=65000;
418 makestar(x,y,b,100,fwhm());
419 }
420 makestar(WIDTH/2,HEIGHT/2,65000,100,fwhm());
421}
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