Index: trunk/psastro/src/psastro.h
===================================================================
--- trunk/psastro/src/psastro.h	(revision 5575)
+++ trunk/psastro/src/psastro.h	(revision 6791)
@@ -10,4 +10,30 @@
 # define toTPA toTangentPlane
 # define toSky projection
+
+// How much of the FPA to load at a time
+typedef enum {
+    PP_LOAD_NONE,                       // Don't load anything
+    PP_LOAD_FPA,                        // Load the entire FPA at once
+    PP_LOAD_CHIP,                       // Load by chip
+    PP_LOAD_CELL,                       // Load by cell
+} ppImageLoadDepth;
+
+// Configuration data
+typedef struct {
+    psMetadata *site;                   // The site configuration
+    psMetadata *camera;                 // The camera configuration
+    psMetadata *recipe;                 // The recipe (i.e., specific setups)
+    psMetadata *arguments;              // Command-line arguments
+    psMetadata *options;                // Command-line recipe options
+    psDB       *database;               // Database handle
+} ppConfig;
+
+// A file to process
+typedef struct {
+    char *filename;                     // File name
+    psFits *fits;                       // The FITS file handle
+    psMetadata *phu;                    // The FITS header
+    pmFPA *fpa;                         // The FPA, with pixels and extensions
+} ppFile;
 
 bool              pmAstromReadWCS (psPlaneTransform **toFPA, psProjection **toSky, psMetadata *header);