diff options
Diffstat (limited to 'src/hdf5-file.c')
| -rw-r--r-- | src/hdf5-file.c | 38 |
1 files changed, 33 insertions, 5 deletions
diff --git a/src/hdf5-file.c b/src/hdf5-file.c index 4406ce63..938422a7 100644 --- a/src/hdf5-file.c +++ b/src/hdf5-file.c @@ -251,6 +251,24 @@ int hdf5_write(const char *filename, const int16_t *data, } +static double get_wavelength(struct hdfile *f) +{ + herr_t r; + hid_t dh; + double lambda; + + dh = H5Dopen(f->fh, "/LCLS/wavelength", H5P_DEFAULT); + if ( dh < 0 ) return -1.0; + + r = H5Dread(dh, H5T_NATIVE_DOUBLE, H5S_ALL, H5S_ALL, + H5P_DEFAULT, &lambda); + if ( r < 0 ) return -1.0; + + /* Convert Angstroms -> m */ + return lambda / 1.0e10; +} + + int hdf5_read(struct hdfile *f, struct image *image) { herr_t r; @@ -269,17 +287,27 @@ int hdf5_read(struct hdfile *f, struct image *image) image->data = buf; image->height = f->nx; image->width = f->ny; + f->image_dirty = 0; - /* FIXME: The following are basically made up... */ + /* Always camera length/lambda formulation for FEL */ + image->fmode = FORMULATION_CLEN; + + /* Read wavelength from file */ + image->lambda = get_wavelength(f); + if ( image->lambda < 0.0 ) { + ERROR("Couldn't read wavelength - using 2 keV.\n"); + image->lambda = ph_en_to_lambda(eV_to_J(2000.0)); + } + STATUS("lambda=%e m\n", image->lambda); + + /* These are only used for simulation (not analysis) */ image->x_centre = image->width/2; image->y_centre = image->height/2; - image->lambda = ph_en_to_lambda(eV_to_J(1793.0)); - image->fmode = FORMULATION_CLEN; + + /* FIXME: The following are basically made up... */ image->camera_len = 75.0e-3; /* 75 mm camera length */ image->resolution = 13333.3; /* 75 micron pixel size */ - f->image_dirty = 0; - return 0; } |