Changeset 19013 for trunk/psModules/src/camera/pmFPARead.c

Timestamp:

Aug 11, 2008, 4:51:20 PM (18 years ago)

Author:

Paul Price

Message:

The operation of pmReadoutReadChunk was broken by the recent changes to support threading. Those changes assumed that the user would keep track of the 'this' and 'last' scan values. While that is the case for ppMerge in its new threaded incarnation, that's not the case for ppStack (yet), and the user shouldn't be forced to do something so mundane and important. Added a new readout variable, forceScan, which is supposed to tell the code to obey what the user says for the 'this' and 'last' scan values. When forceScan isn't set, then the reading reverts to the old way (progressively reading up the readout).

File:

• trunk/psModules/src/camera/pmFPARead.c (modified) (8 diffs)

trunk/psModules/src/camera/pmFPARead.c

@@ -44 +44 @@
 //////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
-// Return pointer to appropriate value for tracking scans
+// Get the "thisXXXScan" value in the readout for the appropriate image type
 static int readoutGetThisScan(pmReadout *readout, // Readout of interest
                               fpaReadType type // Type of image
@@ -61 +61 @@
 }
 
-// Return pointer to appropriate value for tracking scans
-static int readoutSetLastScan(pmReadout *readout, // Readout of interest
-                              fpaReadType type,   // Type of image
-                              int numScans        // requested number of scans
+// Set the "thisXXXScan" value in the readout for the appropriate image type
+static int readoutSetThisScan(pmReadout *readout, // Readout of interest
+                              fpaReadType type, // Type of image
+                              int thisScan // Starting scan number
     )
 {
     switch (type) {
       case FPA_READ_TYPE_IMAGE:
-        readout->lastImageScan = readout->thisImageScan + numScans;
+        readout->thisImageScan = thisScan;
         return readout->lastImageScan;
       case FPA_READ_TYPE_MASK:
-        readout->lastMaskScan = readout->thisMaskScan + numScans;
+        readout->thisMaskScan = thisScan;
         return readout->lastMaskScan;
       case FPA_READ_TYPE_WEIGHT:
-        readout->lastWeightScan = readout->thisWeightScan + numScans;
+        readout->thisWeightScan = thisScan;
+        return readout->lastWeightScan;
+      default:
+        psAbort("Unknown read type: %x\n", type);
+    }
+    return false;
+}
+
+// Get the "lastXXXScan" value in the readout for the appropriate image type
+static int readoutGetLastScan(pmReadout *readout, // Readout of interest
+                              fpaReadType type // Type of image
+    )
+{
+    switch (type) {
+      case FPA_READ_TYPE_IMAGE:
+        return readout->lastImageScan;
+      case FPA_READ_TYPE_MASK:
+        return readout->lastMaskScan;
+      case FPA_READ_TYPE_WEIGHT:
+        return readout->lastWeightScan;
+      default:
+        psAbort("Unknown read type: %x\n", type);
+    }
+}
+
+// Set the "lastXXXScan" value in the readout for the appropriate image type
+static int readoutSetLastScan(pmReadout *readout, // Readout of interest
+                              fpaReadType type, // Type of image
+                              int lastScan // Last scan number
+    )
+{
+    switch (type) {
+      case FPA_READ_TYPE_IMAGE:
+        readout->lastImageScan = lastScan;
+        return readout->lastImageScan;
+      case FPA_READ_TYPE_MASK:
+        readout->lastMaskScan = lastScan;
+        return readout->lastMaskScan;
+      case FPA_READ_TYPE_WEIGHT:
+        readout->lastWeightScan = lastScan;
         return readout->lastWeightScan;
       default:
@@ -156 +195 @@
 }
 
-// Does the current readout, with scans set for a new read, represent any real data, or is it
-// beyond the end?  Requires that cellNumReadouts() has been called before (for header and
-// concepts to have been read) In the process, adjusts the TRIMSEC
-static bool readoutHaveMoreScans(bool *result,   // true : more data to read
+// Does the current readout, with scans set for a new read, represent any real data, or is it beyond the end?
+// Requires that cellNumReadouts() has been called before (for header and concepts to have been read)
+// In the process, adjusts the TRIMSEC
+static bool readoutHaveMoreScans(int *start, // Start of scan
+                                 int *last, // Last possible scan (defined by TRIMSEC)
                                  pmReadout *readout, // Readout of interest
                                  int numScans, // Number of scans to read at a time
@@ -166 +206 @@
                                  )
 {
-    assert(result);
+    assert(start);
+    assert(last);
     assert(readout);
-
-    *result = false;
 
     if (!pmConceptsReadCell(readout->parent, PM_CONCEPT_SOURCE_DEFAULTS | PM_CONCEPT_SOURCE_DATABASE,
@@ -213 +252 @@
     }
 
+    *last = (readdir == 1) ? trimsec->y1 : trimsec->x1; // Maximum possible scan number
+
     // Calculate the segment offset and upper limit
     if (numScans == 0) {
-        // in the case of numScans == 0, we never call this funtion unless the data has not yet
-        // been read.  thus, only if the delta is  should we return false (ie, trimsec defines an empty region)
-        int thisScan = (readdir == 1) ? trimsec->y0 : trimsec->x0;
-        int lastScan = (readdir == 1) ? trimsec->y1 : trimsec->x1;
-        *result = (lastScan > thisScan);
-        return true;
-    }
-
-    // allow multiple threads to read different segments into different readouts
-    // this thread may not have read a segment yet; but others have.  trust readout->imageScan
-
-    // is the start scan of the read less than the last possible scan?
-    int thisScan = readoutGetThisScan(readout, type);
-    int lastScan = (readdir == 1) ? trimsec->y1 : trimsec->x1;
-
-    *result = (lastScan > thisScan);
+        // Read entire image.  In that case, we never call this funtion unless the data has not yet been read.
+        // thus, only if the delta is should we return false (ie, trimsec defines an empty region)
+        *start = (readdir == 1) ? trimsec->y0 : trimsec->x0;
+    } else if (readout->forceScan) {
+        // We're forced to read what we're told
+        *start = readoutGetThisScan(readout, type);
+    } else {
+        // Progressive scans
+        psImage *image = *readoutImageByType(readout, type); // Appropriate image from readout
+        *start = image ? readoutGetLastScan(readout, type) + numScans : 0;
+    }
+
     return true;
-    // XXX fold this and the above case together
 }
 
@@ -271 +307 @@
     }
 
-    bool haveData;
-    if (!readoutHaveMoreScans(&haveData, readout, numScans, type, config)) {
+    int start, last;                    // Start and last scans
+    if (!readoutHaveMoreScans(&start, &last, readout, numScans, type, config)) {
         psError(PS_ERR_UNKNOWN, false, "Unable to determine readout properties.");
         return false;
     }
 
-    return haveData;
+    return start < last;
 }
 
@@ -458 +494 @@
     }
 
-    bool haveData;
-    if (!readoutHaveMoreScans(&haveData, readout, numScans, type, config)) {
+    int thisScan;                       // Starting scan for this read
+    int maxScan;                        // Maximum scan number
+    if (!readoutHaveMoreScans(&thisScan, &maxScan, readout, numScans, type, config)) {
         psError(PS_ERR_UNKNOWN, false, "Unable to determine readout properties.");
         return false;
     }
-    if (!haveData) {
+    if (thisScan >= maxScan) {
         psError(PS_ERR_IO, true, "No more of the readout to read.");
         return false;
     }
-
 
     pmHDU *hdu = pmHDUFromCell(cell);   // The HDU
@@ -511 +547 @@
     }
 
-    // Determine the numbe of scans to read
-    int thisScan = readoutGetThisScan(readout, type);
-    int lastScan = readoutSetLastScan (readout, type, numScans);
+    // Determine the number of scans to read
+    int lastScan = readoutSetLastScan(readout, type, thisScan + numScans);
     if (thisScan == 0) {
         overlap = 0;
     }
     thisScan -= overlap;
+    readoutSetThisScan(readout, type, thisScan);
 
     // Calculate limits, adjust readout->row0,col0
     // XXX Should row0,col0 be adjusted, since they are used for astrometry???
-    // Just moved to using the "scansTracker" for tracking position in chunk reads, so row0,col0 not required
     if (readdir == 1) {
         // Reading rows