void oskar_imager_update_plane_fft(oskar_Imager* h, int num_vis,
const oskar_Mem* uu, const oskar_Mem* vv, const oskar_Mem* amps,
const oskar_Mem* weight, oskar_Mem* plane, double* plane_norm,
int* status)
{
int num_cells, num_skipped = 0;
if (*status) return;
num_cells = h->grid_size * h->grid_size;
if (oskar_mem_precision(plane) != h->imager_prec)
*status = OSKAR_ERR_TYPE_MISMATCH;
if ((int)oskar_mem_length(plane) < num_cells)
oskar_mem_realloc(plane, num_cells, status);
if (*status) return;
if (h->imager_prec == OSKAR_DOUBLE)
oskar_grid_simple_d(h->support, h->oversample,
oskar_mem_double_const(h->conv_func, status), num_vis,
oskar_mem_double_const(uu, status),
oskar_mem_double_const(vv, status),
oskar_mem_double_const(amps, status),
oskar_mem_double_const(weight, status), h->cellsize_rad,
h->grid_size, &num_skipped, plane_norm,
oskar_mem_double(plane, status));
else
oskar_grid_simple_f(h->support, h->oversample,
oskar_mem_double_const(h->conv_func, status), num_vis,
oskar_mem_float_const(uu, status),
oskar_mem_float_const(vv, status),
oskar_mem_float_const(amps, status),
oskar_mem_float_const(weight, status), h->cellsize_rad,
h->grid_size, &num_skipped, plane_norm,
oskar_mem_float(plane, status));
if (num_skipped > 0)
printf("WARNING: Skipped %d visibility points.\n", num_skipped);
}
void oskar_imager_trim_image(oskar_Mem* plane,
int plane_size, int image_size, int* status)
{
int i, num_cells, size_diff;
if (*status) return;
/* Get the real part only, if the plane is complex. */
if (oskar_mem_is_complex(plane))
{
num_cells = plane_size * plane_size;
if (oskar_mem_precision(plane) == OSKAR_DOUBLE)
{
double *t = oskar_mem_double(plane, status);
for (i = 0; i < num_cells; ++i) t[i] = t[2 * i];
}
else
{
float *t = oskar_mem_float(plane, status);
for (i = 0; i < num_cells; ++i) t[i] = t[2 * i];
}
}
/* Trim to required image size. */
size_diff = plane_size - image_size;
if (size_diff > 0)
{
char *ptr;
size_t in = 0, out = 0, copy_len = 0, element_size = 0;
ptr = oskar_mem_char(plane);
element_size = oskar_mem_element_size(oskar_mem_precision(plane));
copy_len = element_size * image_size;
in = element_size * (size_diff / 2) * (plane_size + 1);
for (i = 0; i < image_size; ++i)
{
/* Use memmove() instead of memcpy() to allow for overlap. */
memmove(ptr + out, ptr + in, copy_len);
in += plane_size * element_size;
out += copy_len;
}
}
}
void oskar_imager_rotate_vis(size_t num_vis, const oskar_Mem* uu,
const oskar_Mem* vv, const oskar_Mem* ww, oskar_Mem* amps,
const double delta_l, const double delta_m, const double delta_n)
{
size_t i;
if (oskar_mem_precision(amps) == OSKAR_DOUBLE)
{
const double *u, *v, *w;
double2* a;
u = (const double*)oskar_mem_void_const(uu);
v = (const double*)oskar_mem_void_const(vv);
w = (const double*)oskar_mem_void_const(ww);
a = (double2*)oskar_mem_void(amps);
for (i = 0; i < num_vis; ++i)
{
double arg, phase_re, phase_im, re, im;
arg = 2.0*M_PI * (u[i] * delta_l + v[i] * delta_m + w[i] * delta_n);
phase_re = cos(arg);
phase_im = sin(arg);
re = a[i].x * phase_re - a[i].y * phase_im;
im = a[i].x * phase_im + a[i].y * phase_re;
a[i].x = re;
a[i].y = im;
}
}
else
{
const float *u, *v, *w;
float2* a;
u = (const float*)oskar_mem_void_const(uu);
v = (const float*)oskar_mem_void_const(vv);
w = (const float*)oskar_mem_void_const(ww);
a = (float2*)oskar_mem_void(amps);
for (i = 0; i < num_vis; ++i)
{
float arg, phase_re, phase_im, re, im;
arg = 2.0*M_PI * (u[i] * delta_l + v[i] * delta_m + w[i] * delta_n);
phase_re = cos(arg);
phase_im = sin(arg);
re = a[i].x * phase_re - a[i].y * phase_im;
im = a[i].x * phase_im + a[i].y * phase_re;
a[i].x = re;
a[i].y = im;
}
}
}
void copy_vis_pol(oskar_Mem* amps, oskar_Mem* wt, int amps_offset,
const oskar_Mem* vis, const oskar_Mem* weight, int vis_offset,
int weight_offset, int num_baselines, int stride, int pol_offset,
int* status)
{
int i;
if (*status) return;
if (oskar_mem_precision(amps) == OSKAR_SINGLE)
{
float* w_out;
const float* w_in;
w_out = oskar_mem_float(wt, status) + amps_offset;
w_in = oskar_mem_float_const(weight, status);
for (i = 0; i < num_baselines; ++i)
w_out[i] = w_in[stride * (weight_offset + i) + pol_offset];
if (vis)
{
float2* a;
const float2* v;
a = oskar_mem_float2(amps, status) + amps_offset;
v = oskar_mem_float2_const(vis, status);
for (i = 0; i < num_baselines; ++i)
a[i] = v[stride * (vis_offset + i) + pol_offset];
}
}
else
{
double* w_out;
const double* w_in;
w_out = oskar_mem_double(wt, status) + amps_offset;
w_in = oskar_mem_double_const(weight, status);
for (i = 0; i < num_baselines; ++i)
w_out[i] = w_in[stride * (weight_offset + i) + pol_offset];
if (vis)
{
double2* a;
const double2* v;
a = oskar_mem_double2(amps, status) + amps_offset;
v = oskar_mem_double2_const(vis, status);
for (i = 0; i < num_baselines; ++i)
a[i] = v[stride * (vis_offset + i) + pol_offset];
}
}
}
static void convert_complex(const oskar_Mem* input, oskar_Mem* output,
int offset, int* status)
{
size_t i, num_elements;
if (*status) return;
num_elements = oskar_mem_length(input);
if (oskar_mem_precision(input) == OSKAR_SINGLE)
{
const float *in;
float *out;
in = oskar_mem_float_const(input, status);
out = oskar_mem_float(output, status);
for (i = 0; i < num_elements; ++i) out[i] = in[2*i + offset];
}
else
{
const double *in;
double *out;
in = oskar_mem_double_const(input, status);
out = oskar_mem_double(output, status);
for (i = 0; i < num_elements; ++i) out[i] = in[2*i + offset];
}
}
void oskar_mem_add_real(oskar_Mem* mem, double val, int* status)
{
int precision, location;
size_t i, num_elements;
/* Check if safe to proceed. */
if (*status) return;
/* Get meta-data. */
precision = oskar_mem_precision(mem);
location = oskar_mem_location(mem);
/* Check for empty array. */
num_elements = oskar_mem_length(mem);
if (num_elements == 0)
return;
/* Check location. */
if (location != OSKAR_CPU)
{
*status = OSKAR_ERR_BAD_LOCATION;
return;
}
/* Get total number of elements to add. */
if (oskar_mem_is_matrix(mem))
num_elements *= 4;
/* Switch on type and location. */
if (oskar_mem_is_complex(mem))
{
if (precision == OSKAR_DOUBLE)
{
double2 *t;
t = oskar_mem_double2(mem, status);
for (i = 0; i < num_elements; ++i) t[i].x += val;
}
else if (precision == OSKAR_SINGLE)
{
float2 *t;
t = oskar_mem_float2(mem, status);
for (i = 0; i < num_elements; ++i) t[i].x += val;
}
else
{
*status = OSKAR_ERR_BAD_DATA_TYPE;
}
}
else
{
if (precision == OSKAR_DOUBLE)
{
double *t;
t = oskar_mem_double(mem, status);
for (i = 0; i < num_elements; ++i) t[i] += val;
}
else if (precision == OSKAR_SINGLE)
{
float *t;
t = oskar_mem_float(mem, status);
for (i = 0; i < num_elements; ++i) t[i] += val;
}
else
{
*status = OSKAR_ERR_BAD_DATA_TYPE;
}
}
}
void oskar_imager_finalise_plane(oskar_Imager* h, oskar_Mem* plane,
double plane_norm, int* status)
{
int size, num_cells;
DeviceData* d;
if (*status) return;
/* Apply normalisation. */
if (plane_norm > 0.0 || plane_norm < 0.0)
oskar_mem_scale_real(plane, 1.0 / plane_norm, status);
if (h->algorithm == OSKAR_ALGORITHM_DFT_2D ||
h->algorithm == OSKAR_ALGORITHM_DFT_3D)
return;
/* Check plane is complex type, as plane must be gridded visibilities. */
if (!oskar_mem_is_complex(plane))
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
/* Make image using FFT and apply grid correction. */
size = h->grid_size;
num_cells = size * size;
d = &h->d[0];
if (oskar_mem_precision(plane) == OSKAR_DOUBLE)
{
oskar_fftphase_cd(size, size, oskar_mem_double(plane, status));
if (h->fft_on_gpu)
{
#ifdef OSKAR_HAVE_CUDA
oskar_device_set(h->cuda_device_ids[0], status);
oskar_mem_copy(d->plane_gpu, plane, status);
cufftExecZ2Z(h->cufft_plan, oskar_mem_void(d->plane_gpu),
oskar_mem_void(d->plane_gpu), CUFFT_FORWARD);
oskar_mem_copy(plane, d->plane_gpu, status);
#else
*status = OSKAR_ERR_CUDA_NOT_AVAILABLE;
#endif
}
else
{
oskar_fftpack_cfft2f(size, size, size,
oskar_mem_double(plane, status),
oskar_mem_double(h->fftpack_wsave, status),
oskar_mem_double(h->fftpack_work, status));
oskar_mem_scale_real(plane, (double)num_cells, status);
}
oskar_fftphase_cd(size, size, oskar_mem_double(plane, status));
oskar_grid_correction_d(size, oskar_mem_double(h->corr_func, status),
oskar_mem_double(plane, status));
}
else
{
oskar_fftphase_cf(size, size, oskar_mem_float(plane, status));
if (h->fft_on_gpu)
{
#ifdef OSKAR_HAVE_CUDA
oskar_device_set(h->cuda_device_ids[0], status);
oskar_mem_copy(d->plane_gpu, plane, status);
cufftExecC2C(h->cufft_plan, oskar_mem_void(d->plane_gpu),
oskar_mem_void(d->plane_gpu), CUFFT_FORWARD);
oskar_mem_copy(plane, d->plane_gpu, status);
#else
*status = OSKAR_ERR_CUDA_NOT_AVAILABLE;
#endif
}
else
{
oskar_fftpack_cfft2f_f(size, size, size,
oskar_mem_float(plane, status),
oskar_mem_float(h->fftpack_wsave, status),
oskar_mem_float(h->fftpack_work, status));
oskar_mem_scale_real(plane, (double)num_cells, status);
}
oskar_fftphase_cf(size, size, oskar_mem_float(plane, status));
oskar_grid_correction_f(size, oskar_mem_double(h->corr_func, status),
oskar_mem_float(plane, status));
}
}
void oskar_gaussian_circular(int num_points,
const oskar_Mem* l, const oskar_Mem* m, double std,
oskar_Mem* out, int* status)
{
if (*status) return;
const int location = oskar_mem_location(out);
const double inv_2_var = 1.0 / (2.0 * std * std);
const float inv_2_var_f = (float)inv_2_var;
if (oskar_mem_precision(out) != oskar_mem_type(l) ||
oskar_mem_precision(out) != oskar_mem_type(m))
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
if (location != oskar_mem_location(l) || location != oskar_mem_location(m))
{
*status = OSKAR_ERR_LOCATION_MISMATCH;
return;
}
if ((int)oskar_mem_length(l) < num_points ||
(int)oskar_mem_length(m) < num_points)
{
*status = OSKAR_ERR_DIMENSION_MISMATCH;
return;
}
oskar_mem_ensure(out, num_points, status);
if (*status) return;
if (location == OSKAR_CPU)
{
switch (oskar_mem_type(out))
{
case OSKAR_SINGLE_COMPLEX:
gaussian_circular_complex_f(num_points,
oskar_mem_float_const(l, status),
oskar_mem_float_const(m, status), inv_2_var_f,
oskar_mem_float2(out, status));
break;
case OSKAR_DOUBLE_COMPLEX:
gaussian_circular_complex_d(num_points,
oskar_mem_double_const(l, status),
oskar_mem_double_const(m, status), inv_2_var,
oskar_mem_double2(out, status));
break;
case OSKAR_SINGLE_COMPLEX_MATRIX:
gaussian_circular_matrix_f(num_points,
oskar_mem_float_const(l, status),
oskar_mem_float_const(m, status), inv_2_var_f,
oskar_mem_float4c(out, status));
break;
case OSKAR_DOUBLE_COMPLEX_MATRIX:
gaussian_circular_matrix_d(num_points,
oskar_mem_double_const(l, status),
oskar_mem_double_const(m, status), inv_2_var,
oskar_mem_double4c(out, status));
break;
default:
*status = OSKAR_ERR_BAD_DATA_TYPE;
break;
}
}
else
{
size_t local_size[] = {256, 1, 1}, global_size[] = {1, 1, 1};
const char* k = 0;
const int is_dbl = oskar_mem_is_double(out);
switch (oskar_mem_type(out))
{
case OSKAR_SINGLE_COMPLEX:
k = "gaussian_circular_complex_float"; break;
case OSKAR_DOUBLE_COMPLEX:
k = "gaussian_circular_complex_double"; break;
case OSKAR_SINGLE_COMPLEX_MATRIX:
k = "gaussian_circular_matrix_float"; break;
case OSKAR_DOUBLE_COMPLEX_MATRIX:
k = "gaussian_circular_matrix_double"; break;
default:
*status = OSKAR_ERR_BAD_DATA_TYPE;
return;
}
oskar_device_check_local_size(location, 0, local_size);
global_size[0] = oskar_device_global_size(
(size_t) num_points, local_size[0]);
const oskar_Arg args[] = {
{INT_SZ, &num_points},
{PTR_SZ, oskar_mem_buffer_const(l)},
{PTR_SZ, oskar_mem_buffer_const(m)},
{is_dbl ? DBL_SZ : FLT_SZ, is_dbl ?
(const void*)&inv_2_var : (const void*)&inv_2_var_f},
{PTR_SZ, oskar_mem_buffer(out)}
};
oskar_device_launch_kernel(k, location, 1, local_size, global_size,
sizeof(args) / sizeof(oskar_Arg), args, 0, 0, status);
}
}
void oskar_evaluate_element_weights_dft(int num_elements,
const oskar_Mem* x, const oskar_Mem* y, const oskar_Mem* z,
double wavenumber, double x_beam, double y_beam, double z_beam,
oskar_Mem* weights, int* status)
{
if (*status) return;
const int location = oskar_mem_location(weights);
const int type = oskar_mem_type(weights);
const int precision = oskar_mem_precision(weights);
if (oskar_mem_location(x) != location ||
oskar_mem_location(y) != location ||
oskar_mem_location(z) != location)
{
*status = OSKAR_ERR_LOCATION_MISMATCH;
return;
}
if (oskar_mem_type(x) != precision || oskar_mem_type(y) != precision ||
oskar_mem_type(z) != precision)
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
if ((int)oskar_mem_length(weights) < num_elements ||
(int)oskar_mem_length(x) < num_elements ||
(int)oskar_mem_length(y) < num_elements ||
(int)oskar_mem_length(z) < num_elements)
{
*status = OSKAR_ERR_DIMENSION_MISMATCH;
return;
}
if (location == OSKAR_CPU)
{
if (type == OSKAR_DOUBLE_COMPLEX)
evaluate_element_weights_dft_d(num_elements,
oskar_mem_double_const(x, status),
oskar_mem_double_const(y, status),
oskar_mem_double_const(z, status),
wavenumber, x_beam, y_beam, z_beam,
oskar_mem_double2(weights, status));
else if (type == OSKAR_SINGLE_COMPLEX)
evaluate_element_weights_dft_f(num_elements,
oskar_mem_float_const(x, status),
oskar_mem_float_const(y, status),
oskar_mem_float_const(z, status),
wavenumber, x_beam, y_beam, z_beam,
oskar_mem_float2(weights, status));
else
*status = OSKAR_ERR_BAD_DATA_TYPE;
}
else
{
size_t local_size[] = {256, 1, 1}, global_size[] = {1, 1, 1};
const char* k = 0;
const int is_dbl = oskar_mem_is_double(weights);
if (type == OSKAR_DOUBLE_COMPLEX)
k = "evaluate_element_weights_dft_double";
else if (type == OSKAR_SINGLE_COMPLEX)
k = "evaluate_element_weights_dft_float";
else
{
*status = OSKAR_ERR_BAD_DATA_TYPE;
return;
}
const float w = (float) wavenumber;
const float x1 = (float) x_beam;
const float y1 = (float) y_beam;
const float z1 = (float) z_beam;
oskar_device_check_local_size(location, 0, local_size);
global_size[0] = oskar_device_global_size(
(size_t) num_elements, local_size[0]);
const oskar_Arg args[] = {
{INT_SZ, &num_elements},
{PTR_SZ, oskar_mem_buffer_const(x)},
{PTR_SZ, oskar_mem_buffer_const(y)},
{PTR_SZ, oskar_mem_buffer_const(z)},
{is_dbl ? DBL_SZ : FLT_SZ,
is_dbl ? (const void*)&wavenumber : (const void*)&w},
{is_dbl ? DBL_SZ : FLT_SZ,
is_dbl ? (const void*)&x_beam : (const void*)&x1},
{is_dbl ? DBL_SZ : FLT_SZ,
is_dbl ? (const void*)&y_beam : (const void*)&y1},
{is_dbl ? DBL_SZ : FLT_SZ,
is_dbl ? (const void*)&z_beam : (const void*)&z1},
{PTR_SZ, oskar_mem_buffer(weights)}
};
oskar_device_launch_kernel(k, location, 1, local_size, global_size,
sizeof(args) / sizeof(oskar_Arg), args, 0, 0, status);
}
}
void oskar_imager_update_plane_dft(oskar_Imager* h, size_t num_vis,
const oskar_Mem* uu, const oskar_Mem* vv, const oskar_Mem* ww,
const oskar_Mem* amps, const oskar_Mem* weight, oskar_Mem* plane,
double* plane_norm, int* status)
{
size_t i, num_pixels;
oskar_Thread** threads = 0;
ThreadArgs* args = 0;
if (*status) return;
/* Check the image plane. */
num_pixels = (size_t) h->image_size;
num_pixels *= num_pixels;
if (oskar_mem_precision(plane) != h->imager_prec)
*status = OSKAR_ERR_TYPE_MISMATCH;
if (oskar_mem_is_complex(plane) || oskar_mem_is_matrix(plane))
*status = OSKAR_ERR_BAD_DATA_TYPE;
oskar_mem_ensure(plane, num_pixels, status);
if (*status) return;
/* Set up worker threads. */
const size_t num_threads = (size_t) (h->num_devices);
threads = (oskar_Thread**) calloc(num_threads, sizeof(oskar_Thread*));
args = (ThreadArgs*) calloc(num_threads, sizeof(ThreadArgs));
for (i = 0; i < num_threads; ++i)
{
args[i].h = h;
args[i].thread_id = (int) i;
args[i].num_vis = (int) num_vis;
args[i].uu = uu;
args[i].vv = vv;
args[i].ww = ww;
args[i].amp = amps;
args[i].weight = weight;
args[i].plane = plane;
}
/* Set status code. */
h->status = *status;
/* Start the worker threads. */
h->i_block = 0;
for (i = 0; i < num_threads; ++i)
threads[i] = oskar_thread_create(run_blocks, (void*)&args[i], 0);
/* Wait for worker threads to finish. */
for (i = 0; i < num_threads; ++i)
{
oskar_thread_join(threads[i]);
oskar_thread_free(threads[i]);
}
free(threads);
free(args);
/* Get status code. */
*status = h->status;
/* Update normalisation. */
if (oskar_mem_precision(weight) == OSKAR_DOUBLE)
{
const double* w = oskar_mem_double_const(weight, status);
for (i = 0; i < num_vis; ++i) *plane_norm += w[i];
}
else
{
const float* w = oskar_mem_float_const(weight, status);
for (i = 0; i < num_vis; ++i) *plane_norm += w[i];
}
}
void oskar_convert_brightness_to_jy(oskar_Mem* data, double beam_area_pixels,
double pixel_area_sr, double frequency_hz, double min_peak_fraction,
double min_abs_val, const char* reported_map_units,
const char* default_map_units, int override_input_units, int* status)
{
static const double k_B = 1.3806488e-23; /* Boltzmann constant. */
double lambda, peak = 0.0, peak_min = 0.0, scaling = 1.0, val = 0.0;
const char* unit_str = 0;
int i = 0, num_pixels, units = 0, type;
if (*status) return;
/* Filter and find peak of image. */
num_pixels = (int) oskar_mem_length(data);
type = oskar_mem_precision(data);
if (type == OSKAR_SINGLE)
{
float *img = oskar_mem_float(data, status);
for (i = 0; i < num_pixels; ++i)
{
val = img[i];
if (val > peak) peak = val;
}
peak_min = peak * min_peak_fraction;
for (i = 0; i < num_pixels; ++i)
{
val = img[i];
if (val < peak_min || val < min_abs_val) img[i] = 0.0;
}
}
else
{
double *img = oskar_mem_double(data, status);
for (i = 0; i < num_pixels; ++i)
{
val = img[i];
if (val > peak) peak = val;
}
peak_min = peak * min_peak_fraction;
for (i = 0; i < num_pixels; ++i)
{
val = img[i];
if (val < peak_min || val < min_abs_val) img[i] = 0.0;
}
}
/* Find brightness units. */
unit_str = (!reported_map_units || override_input_units) ?
default_map_units : reported_map_units;
if (!strncmp(unit_str, "JY/BEAM", 7) ||
!strncmp(unit_str, "Jy/beam", 7))
units = JY_BEAM;
else if (!strncmp(unit_str, "JY/PIXEL", 8) ||
!strncmp(unit_str, "Jy/pixel", 8))
units = JY_PIXEL;
else if (!strncmp(unit_str, "mK", 2))
units = MK;
else if (!strncmp(unit_str, "K", 1))
units = K;
else
*status = OSKAR_ERR_BAD_UNITS;
/* Check if we need to convert the pixel values. */
if (units == JY_BEAM)
{
if (beam_area_pixels == 0.0)
{
oskar_log_error("Need beam area for maps in Jy/beam.");
*status = OSKAR_ERR_BAD_UNITS;
}
else
scaling = 1.0 / beam_area_pixels;
}
else if (units == K || units == MK)
{
if (units == MK)
scaling = 1e-3; /* Convert milli-Kelvin to Kelvin. */
/* Convert temperature to Jansky per pixel. */
/* Brightness temperature to flux density conversion:
* http://www.iram.fr/IRAMFR/IS/IS2002/html_1/node187.html */
/* Multiply by 2.0 * k_B * pixel_area * 10^26 / lambda^2. */
lambda = 299792458.0 / frequency_hz;
scaling *= (2.0 * k_B * pixel_area_sr * 1e26 / (lambda*lambda));
}
/* Scale pixels into Jy. */
if (scaling != 1.0)
oskar_mem_scale_real(data, scaling, 0, oskar_mem_length(data), status);
}
void oskar_imager_update_plane_wproj(oskar_Imager* h, size_t num_vis,
const oskar_Mem* uu, const oskar_Mem* vv, const oskar_Mem* ww,
const oskar_Mem* amps, const oskar_Mem* weight, oskar_Mem* plane,
double* plane_norm, size_t* num_skipped, int* status)
{
int grid_size;
size_t num_cells;
if (*status) return;
grid_size = oskar_imager_plane_size(h);
num_cells = grid_size * grid_size;
if (oskar_mem_precision(plane) != h->imager_prec)
*status = OSKAR_ERR_TYPE_MISMATCH;
if (oskar_mem_length(plane) < num_cells)
oskar_mem_realloc(plane, num_cells, status);
if (*status) return;
if (h->imager_prec == OSKAR_DOUBLE)
oskar_grid_wproj_d(h->num_w_planes,
oskar_mem_int_const(h->w_support, status),
h->oversample, h->conv_size_half,
oskar_mem_double_const(h->w_kernels, status), num_vis,
oskar_mem_double_const(uu, status),
oskar_mem_double_const(vv, status),
oskar_mem_double_const(ww, status),
oskar_mem_double_const(amps, status),
oskar_mem_double_const(weight, status),
h->cellsize_rad, h->w_scale,
grid_size, num_skipped, plane_norm,
oskar_mem_double(plane, status));
else
{
char *fname = 0;
#if SAVE_INPUT_DAT || SAVE_OUTPUT_DAT || SAVE_GRID
fname = (char*) calloc(20 +
h->input_root ? strlen(h->input_root) : 0, 1);
#endif
#if SAVE_INPUT_DAT
{
const float cellsize_rad_tmp = (const float) (h->cellsize_rad);
const float w_scale_tmp = (const float) (h->w_scale);
const size_t num_w_planes = (size_t) (h->num_w_planes);
FILE* f;
sprintf(fname, "%s_INPUT.dat", h->input_root);
f = fopen(fname, "wb");
fwrite(&num_w_planes, sizeof(size_t), 1, f);
fwrite(oskar_mem_void_const(h->w_support),
sizeof(int), num_w_planes, f);
fwrite(&h->oversample, sizeof(int), 1, f);
fwrite(&h->conv_size_half, sizeof(int), 1, f);
fwrite(oskar_mem_void_const(h->w_kernels), 2 * sizeof(float),
h->num_w_planes * h->conv_size_half * h->conv_size_half, f);
fwrite(&num_vis, sizeof(size_t), 1, f);
fwrite(oskar_mem_void_const(uu), sizeof(float), num_vis, f);
fwrite(oskar_mem_void_const(vv), sizeof(float), num_vis, f);
fwrite(oskar_mem_void_const(ww), sizeof(float), num_vis, f);
fwrite(oskar_mem_void_const(amps), 2 * sizeof(float), num_vis, f);
fwrite(oskar_mem_void_const(weight), sizeof(float), num_vis, f);
fwrite(&cellsize_rad_tmp, sizeof(float), 1, f);
fwrite(&w_scale_tmp, sizeof(float), 1, f);
fwrite(&grid_size, sizeof(int), 1, f);
fclose(f);
}
#endif
oskar_grid_wproj_f(h->num_w_planes,
oskar_mem_int_const(h->w_support, status),
h->oversample, h->conv_size_half,
oskar_mem_float_const(h->w_kernels, status), num_vis,
oskar_mem_float_const(uu, status),
oskar_mem_float_const(vv, status),
oskar_mem_float_const(ww, status),
oskar_mem_float_const(amps, status),
oskar_mem_float_const(weight, status),
(float) (h->cellsize_rad), (float) (h->w_scale),
grid_size, num_skipped, plane_norm,
oskar_mem_float(plane, status));
#if SAVE_OUTPUT_DAT
{
FILE* f;
sprintf(fname, "%s_OUTPUT.dat", h->input_root);
f = fopen(fname, "wb");
fwrite(num_skipped, sizeof(size_t), 1, f);
fwrite(plane_norm, sizeof(double), 1, f);
fwrite(&grid_size, sizeof(int), 1, f);
fwrite(oskar_mem_void_const(plane), 2 * sizeof(float), num_cells, f);
fclose(f);
}
#endif
#if SAVE_GRID
sprintf(fname, "%s_GRID", h->input_root);
oskar_mem_write_fits_cube(plane, fname,
grid_size, grid_size, 1, 0, status);
#endif
free(fname);
}
}
void oskar_mem_write_fits_cube(oskar_Mem* data, const char* root_name,
int width, int height, int num_planes, int i_plane, int* status)
{
oskar_Mem *copy = 0, *ptr = 0;
size_t len, buf_len;
char* fname;
/* Checks. */
if (*status) return;
if (oskar_mem_is_matrix(data))
{
*status = OSKAR_ERR_BAD_DATA_TYPE;
return;
}
/* Construct the filename. */
len = strlen(root_name);
buf_len = 11 + len;
fname = (char*) calloc(buf_len, sizeof(char));
/* Copy to host memory if necessary. */
ptr = data;
if (oskar_mem_location(data) != OSKAR_CPU)
{
copy = oskar_mem_create_copy(ptr, OSKAR_CPU, status);
ptr = copy;
}
/* Deal with complex data. */
if (oskar_mem_is_complex(ptr))
{
oskar_Mem *temp;
temp = oskar_mem_create(oskar_mem_precision(ptr), OSKAR_CPU,
oskar_mem_length(ptr), status);
/* Extract the real part and write it. */
SNPRINTF(fname, buf_len, "%s_REAL.fits", root_name);
convert_complex(ptr, temp, 0, status);
write_pixels(temp, fname, width, height, num_planes, i_plane, status);
/* Extract the imaginary part and write it. */
SNPRINTF(fname, buf_len, "%s_IMAG.fits", root_name);
convert_complex(ptr, temp, 1, status);
write_pixels(temp, fname, width, height, num_planes, i_plane, status);
oskar_mem_free(temp, status);
}
else
{
/* No conversion needed. */
if ((len >= 5) && (
!strcmp(&(root_name[len-5]), ".fits") ||
!strcmp(&(root_name[len-5]), ".FITS") ))
{
SNPRINTF(fname, buf_len, "%s", root_name);
}
else
{
SNPRINTF(fname, buf_len, "%s.fits", root_name);
}
write_pixels(ptr, fname, width, height, num_planes, i_plane, status);
}
free(fname);
oskar_mem_free(copy, status);
}
void oskar_dftw(
int normalise,
int num_in,
double wavenumber,
const oskar_Mem* weights_in,
const oskar_Mem* x_in,
const oskar_Mem* y_in,
const oskar_Mem* z_in,
int offset_coord_out,
int num_out,
const oskar_Mem* x_out,
const oskar_Mem* y_out,
const oskar_Mem* z_out,
const oskar_Mem* data,
int offset_out,
oskar_Mem* output,
int* status)
{
if (*status) return;
const int location = oskar_mem_location(output);
const int type = oskar_mem_precision(output);
const int is_dbl = oskar_mem_is_double(output);
const int is_3d = (z_in != NULL && z_out != NULL);
const int is_data = (data != NULL);
const int is_matrix = oskar_mem_is_matrix(output);
if (!oskar_mem_is_complex(output) || !oskar_mem_is_complex(weights_in) ||
oskar_mem_is_matrix(weights_in))
{
*status = OSKAR_ERR_BAD_DATA_TYPE;
return;
}
if (oskar_mem_location(weights_in) != location ||
oskar_mem_location(x_in) != location ||
oskar_mem_location(y_in) != location ||
oskar_mem_location(x_out) != location ||
oskar_mem_location(y_out) != location)
{
*status = OSKAR_ERR_LOCATION_MISMATCH;
return;
}
if (oskar_mem_precision(weights_in) != type ||
oskar_mem_type(x_in) != type ||
oskar_mem_type(y_in) != type ||
oskar_mem_type(x_out) != type ||
oskar_mem_type(y_out) != type)
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
if (is_data)
{
if (oskar_mem_location(data) != location)
{
*status = OSKAR_ERR_LOCATION_MISMATCH;
return;
}
if (!oskar_mem_is_complex(data) ||
oskar_mem_type(data) != oskar_mem_type(output) ||
oskar_mem_precision(data) != type)
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
}
if (is_3d)
{
if (oskar_mem_location(z_in) != location ||
oskar_mem_location(z_out) != location)
{
*status = OSKAR_ERR_LOCATION_MISMATCH;
return;
}
if (oskar_mem_type(z_in) != type || oskar_mem_type(z_out) != type)
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
}
oskar_mem_ensure(output, (size_t) offset_out + num_out, status);
if (*status) return;
if (location == OSKAR_CPU)
{
if (is_data)
{
if (is_matrix)
{
if (is_3d)
{
if (is_dbl)
dftw_m2m_3d_double(num_in, wavenumber,
oskar_mem_double2_const(weights_in, status),
oskar_mem_double_const(x_in, status),
oskar_mem_double_const(y_in, status),
oskar_mem_double_const(z_in, status),
offset_coord_out, num_out,
oskar_mem_double_const(x_out, status),
oskar_mem_double_const(y_out, status),
oskar_mem_double_const(z_out, status),
oskar_mem_double4c_const(data, status),
offset_out,
oskar_mem_double4c(output, status), 0);
else
dftw_m2m_3d_float(num_in, (float)wavenumber,
oskar_mem_float2_const(weights_in, status),
oskar_mem_float_const(x_in, status),
oskar_mem_float_const(y_in, status),
oskar_mem_float_const(z_in, status),
offset_coord_out, num_out,
oskar_mem_float_const(x_out, status),
oskar_mem_float_const(y_out, status),
oskar_mem_float_const(z_out, status),
oskar_mem_float4c_const(data, status),
offset_out,
oskar_mem_float4c(output, status), 0);
}
else
{
if (is_dbl)
dftw_m2m_2d_double(num_in, wavenumber,
oskar_mem_double2_const(weights_in, status),
oskar_mem_double_const(x_in, status),
oskar_mem_double_const(y_in, status), 0,
offset_coord_out, num_out,
oskar_mem_double_const(x_out, status),
oskar_mem_double_const(y_out, status), 0,
oskar_mem_double4c_const(data, status),
offset_out,
oskar_mem_double4c(output, status), 0);
else
dftw_m2m_2d_float(num_in, (float)wavenumber,
oskar_mem_float2_const(weights_in, status),
oskar_mem_float_const(x_in, status),
oskar_mem_float_const(y_in, status), 0,
offset_coord_out, num_out,
oskar_mem_float_const(x_out, status),
oskar_mem_float_const(y_out, status), 0,
oskar_mem_float4c_const(data, status),
offset_out,
oskar_mem_float4c(output, status), 0);
}
}
else
{
if (is_3d)
{
if (is_dbl)
dftw_c2c_3d_double(num_in, wavenumber,
oskar_mem_double2_const(weights_in, status),
oskar_mem_double_const(x_in, status),
oskar_mem_double_const(y_in, status),
oskar_mem_double_const(z_in, status),
offset_coord_out, num_out,
oskar_mem_double_const(x_out, status),
oskar_mem_double_const(y_out, status),
oskar_mem_double_const(z_out, status),
oskar_mem_double2_const(data, status),
offset_out,
oskar_mem_double2(output, status), 0);
else
dftw_c2c_3d_float(num_in, (float)wavenumber,
oskar_mem_float2_const(weights_in, status),
oskar_mem_float_const(x_in, status),
oskar_mem_float_const(y_in, status),
oskar_mem_float_const(z_in, status),
offset_coord_out, num_out,
oskar_mem_float_const(x_out, status),
oskar_mem_float_const(y_out, status),
oskar_mem_float_const(z_out, status),
oskar_mem_float2_const(data, status),
offset_out,
oskar_mem_float2(output, status), 0);
}
else
{
if (is_dbl)
dftw_c2c_2d_double(num_in, wavenumber,
oskar_mem_double2_const(weights_in, status),
oskar_mem_double_const(x_in, status),
oskar_mem_double_const(y_in, status), 0,
offset_coord_out, num_out,
oskar_mem_double_const(x_out, status),
oskar_mem_double_const(y_out, status), 0,
oskar_mem_double2_const(data, status),
offset_out,
oskar_mem_double2(output, status), 0);
else
dftw_c2c_2d_float(num_in, (float)wavenumber,
oskar_mem_float2_const(weights_in, status),
oskar_mem_float_const(x_in, status),
oskar_mem_float_const(y_in, status), 0,
offset_coord_out, num_out,
oskar_mem_float_const(x_out, status),
oskar_mem_float_const(y_out, status), 0,
oskar_mem_float2_const(data, status),
offset_out,
oskar_mem_float2(output, status), 0);
}
}
}
else
{
if (is_3d)
{
if (is_dbl)
dftw_o2c_3d_double(num_in, wavenumber,
oskar_mem_double2_const(weights_in, status),
oskar_mem_double_const(x_in, status),
oskar_mem_double_const(y_in, status),
oskar_mem_double_const(z_in, status),
offset_coord_out, num_out,
oskar_mem_double_const(x_out, status),
oskar_mem_double_const(y_out, status),
oskar_mem_double_const(z_out, status),
0, offset_out,
oskar_mem_double2(output, status), 0);
else
dftw_o2c_3d_float(num_in, (float)wavenumber,
oskar_mem_float2_const(weights_in, status),
oskar_mem_float_const(x_in, status),
oskar_mem_float_const(y_in, status),
oskar_mem_float_const(z_in, status),
offset_coord_out, num_out,
oskar_mem_float_const(x_out, status),
oskar_mem_float_const(y_out, status),
oskar_mem_float_const(z_out, status),
0, offset_out,
oskar_mem_float2(output, status), 0);
}
else
{
if (is_dbl)
dftw_o2c_2d_double(num_in, wavenumber,
oskar_mem_double2_const(weights_in, status),
oskar_mem_double_const(x_in, status),
oskar_mem_double_const(y_in, status), 0,
offset_coord_out, num_out,
oskar_mem_double_const(x_out, status),
oskar_mem_double_const(y_out, status), 0,
0, offset_out,
oskar_mem_double2(output, status), 0);
else
dftw_o2c_2d_float(num_in, (float)wavenumber,
oskar_mem_float2_const(weights_in, status),
oskar_mem_float_const(x_in, status),
oskar_mem_float_const(y_in, status), 0,
offset_coord_out, num_out,
oskar_mem_float_const(x_out, status),
oskar_mem_float_const(y_out, status), 0,
0, offset_out,
oskar_mem_float2(output, status), 0);
}
}
}
else
{
size_t local_size[] = {256, 1, 1}, global_size[] = {1, 1, 1};
const void* np = 0;
const char* k = 0;
int max_in_chunk;
float wavenumber_f = (float) wavenumber;
/* Select the kernel. */
switch (is_dbl * DBL | is_3d * D3 | is_data * DAT | is_matrix * MAT)
{
case D2 | FLT: k = "dftw_o2c_2d_float"; break;
case D2 | DBL: k = "dftw_o2c_2d_double"; break;
case D3 | FLT: k = "dftw_o2c_3d_float"; break;
case D3 | DBL: k = "dftw_o2c_3d_double"; break;
case D2 | FLT | DAT: k = "dftw_c2c_2d_float"; break;
case D2 | DBL | DAT: k = "dftw_c2c_2d_double"; break;
case D3 | FLT | DAT: k = "dftw_c2c_3d_float"; break;
case D3 | DBL | DAT: k = "dftw_c2c_3d_double"; break;
case D2 | FLT | DAT | MAT: k = "dftw_m2m_2d_float"; break;
case D2 | DBL | DAT | MAT: k = "dftw_m2m_2d_double"; break;
case D3 | FLT | DAT | MAT: k = "dftw_m2m_3d_float"; break;
case D3 | DBL | DAT | MAT: k = "dftw_m2m_3d_double"; break;
default:
*status = OSKAR_ERR_FUNCTION_NOT_AVAILABLE;
return;
}
if (oskar_device_is_nv(location))
local_size[0] = (size_t) get_block_size(num_out);
oskar_device_check_local_size(location, 0, local_size);
global_size[0] = oskar_device_global_size(
(size_t) num_out, local_size[0]);
/* max_in_chunk must be multiple of 16. */
max_in_chunk = is_3d ? (is_dbl ? 384 : 800) : (is_dbl ? 448 : 896);
if (is_data && is_3d && !is_dbl) max_in_chunk = 768;
const size_t element_size = is_dbl ? sizeof(double) : sizeof(float);
const size_t local_mem_size = max_in_chunk * element_size;
const size_t arg_size_local[] = {
2 * local_mem_size, 2 * local_mem_size,
(is_3d ? local_mem_size : 0)
};
/* Set kernel arguments. */
const oskar_Arg args[] = {
{INT_SZ, &num_in},
{is_dbl ? DBL_SZ : FLT_SZ,
is_dbl ? (void*)&wavenumber : (void*)&wavenumber_f},
{PTR_SZ, oskar_mem_buffer_const(weights_in)},
{PTR_SZ, oskar_mem_buffer_const(x_in)},
{PTR_SZ, oskar_mem_buffer_const(y_in)},
{PTR_SZ, is_3d ? oskar_mem_buffer_const(z_in) : &np},
{INT_SZ, &offset_coord_out},
{INT_SZ, &num_out},
{PTR_SZ, oskar_mem_buffer_const(x_out)},
{PTR_SZ, oskar_mem_buffer_const(y_out)},
{PTR_SZ, is_3d ? oskar_mem_buffer_const(z_out) : &np},
{PTR_SZ, is_data ? oskar_mem_buffer_const(data) : &np},
{INT_SZ, &offset_out},
{PTR_SZ, oskar_mem_buffer(output)},
{INT_SZ, &max_in_chunk}
};
oskar_device_launch_kernel(k, location, 1, local_size, global_size,
sizeof(args) / sizeof(oskar_Arg), args,
sizeof(arg_size_local) / sizeof(size_t), arg_size_local,
status);
}
if (normalise)
oskar_mem_scale_real(output, 1. / num_in, offset_out, num_out, status);
}
static void load_coords(oskar_Mem* lon, oskar_Mem* lat,
const char* filename, int* status)
{
int type = 0;
FILE* file;
char* line = 0;
size_t n = 0, bufsize = 0;
if (*status) return;
/* Set initial size of coordinate arrays. */
type = oskar_mem_precision(lon);
oskar_mem_realloc(lon, 100, status);
oskar_mem_realloc(lat, 100, status);
/* Open the file. */
file = fopen(filename, "r");
if (!file)
{
*status = OSKAR_ERR_FILE_IO;
return;
}
/* Loop over lines in file. */
while (oskar_getline(&line, &bufsize, file) != OSKAR_ERR_EOF)
{
/* Set defaults. */
/* Longitude, latitude. */
double par[] = {0., 0.};
size_t num_param = sizeof(par) / sizeof(double);
size_t num_required = 2, num_read = 0;
/* Load coordinates. */
num_read = oskar_string_to_array_d(line, num_param, par);
if (num_read < num_required) continue;
/* Ensure enough space in arrays. */
if (oskar_mem_length(lon) <= n)
{
oskar_mem_realloc(lon, n + 100, status);
oskar_mem_realloc(lat, n + 100, status);
if (*status) break;
}
/* Store the coordinates. */
if (type == OSKAR_DOUBLE)
{
oskar_mem_double(lon, status)[n] = par[0] * M_PI/180.0;
oskar_mem_double(lat, status)[n] = par[1] * M_PI/180.0;
}
else
{
oskar_mem_float(lon, status)[n] = par[0] * M_PI/180.0;
oskar_mem_float(lat, status)[n] = par[1] * M_PI/180.0;
}
++n;
}
/* Resize output arrays to final size. */
oskar_mem_realloc(lon, n, status);
oskar_mem_realloc(lat, n, status);
fclose(file);
free(line);
}
void oskar_blank_below_horizon(int offset_mask, int num_sources,
const oskar_Mem* mask, int offset_out, oskar_Mem* data, int* status)
{
if (*status) return;
const int location = oskar_mem_location(data);
if (oskar_mem_location(mask) != location)
{
*status = OSKAR_ERR_LOCATION_MISMATCH;
return;
}
if (oskar_mem_type(mask) != oskar_mem_precision(data))
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
if ((int)oskar_mem_length(data) < num_sources)
{
*status = OSKAR_ERR_DIMENSION_MISMATCH;
return;
}
if (location == OSKAR_CPU)
{
switch (oskar_mem_type(data))
{
case OSKAR_DOUBLE_COMPLEX_MATRIX:
blank_below_horizon_matrix_d(offset_mask, num_sources,
oskar_mem_double_const(mask, status), offset_out,
oskar_mem_double4c(data, status));
break;
case OSKAR_DOUBLE_COMPLEX:
blank_below_horizon_scalar_d(offset_mask, num_sources,
oskar_mem_double_const(mask, status), offset_out,
oskar_mem_double2(data, status));
break;
case OSKAR_SINGLE_COMPLEX_MATRIX:
blank_below_horizon_matrix_f(offset_mask, num_sources,
oskar_mem_float_const(mask, status), offset_out,
oskar_mem_float4c(data, status));
break;
case OSKAR_SINGLE_COMPLEX:
blank_below_horizon_scalar_f(offset_mask, num_sources,
oskar_mem_float_const(mask, status), offset_out,
oskar_mem_float2(data, status));
break;
default:
*status = OSKAR_ERR_BAD_DATA_TYPE;
break;
}
}
else
{
size_t local_size[] = {256, 1, 1}, global_size[] = {1, 1, 1};
const char* k = 0;
switch (oskar_mem_type(data))
{
case OSKAR_DOUBLE_COMPLEX_MATRIX:
k = "blank_below_horizon_matrix_double"; break;
case OSKAR_DOUBLE_COMPLEX:
k = "blank_below_horizon_scalar_double"; break;
case OSKAR_SINGLE_COMPLEX_MATRIX:
k = "blank_below_horizon_matrix_float"; break;
case OSKAR_SINGLE_COMPLEX:
k = "blank_below_horizon_scalar_float"; break;
default:
*status = OSKAR_ERR_BAD_DATA_TYPE;
return;
}
oskar_device_check_local_size(location, 0, local_size);
global_size[0] = oskar_device_global_size(
(size_t) num_sources, local_size[0]);
const oskar_Arg args[] = {
{INT_SZ, &offset_mask},
{INT_SZ, &num_sources},
{PTR_SZ, oskar_mem_buffer_const(mask)},
{INT_SZ, &offset_out},
{PTR_SZ, oskar_mem_buffer(data)}
};
oskar_device_launch_kernel(k, location, 1, local_size, global_size,
sizeof(args) / sizeof(oskar_Arg), args, 0, 0, status);
}
}
TEST(imager, grid_sum)
{
int status = 0, type = OSKAR_DOUBLE;
int size = 2048, grid_size = size * size;
// Create and set up the imager.
oskar_Imager* im = oskar_imager_create(type, &status);
oskar_imager_set_grid_kernel(im, "pillbox", 1, 1, &status);
oskar_imager_set_fov(im, 5.0);
oskar_imager_set_size(im, size, &status);
oskar_Mem* grid = oskar_mem_create(type | OSKAR_COMPLEX, OSKAR_CPU,
grid_size, &status);
ASSERT_EQ(0, status);
// Create visibility data.
int num_vis = 10000;
oskar_Mem* uu = oskar_mem_create(type, OSKAR_CPU, num_vis, &status);
oskar_Mem* vv = oskar_mem_create(type, OSKAR_CPU, num_vis, &status);
oskar_Mem* ww = oskar_mem_create(type, OSKAR_CPU, num_vis, &status);
oskar_Mem* vis = oskar_mem_create(type | OSKAR_COMPLEX, OSKAR_CPU, num_vis,
&status);
oskar_Mem* weight = oskar_mem_create(type, OSKAR_CPU, num_vis, &status);
oskar_mem_random_gaussian(uu, 0, 1, 2, 3, 100.0, &status);
oskar_mem_random_gaussian(vv, 4, 5, 6, 7, 100.0, &status);
oskar_mem_set_value_real(vis, 1.0, 0, num_vis, &status);
oskar_mem_set_value_real(weight, 1.0, 0, num_vis, &status);
// Grid visibility data.
double plane_norm = 0.0;
oskar_imager_update_plane(im, num_vis, uu, vv, ww, vis, weight, grid,
&plane_norm, 0, &status);
ASSERT_DOUBLE_EQ((double)num_vis, plane_norm);
// Sum the grid.
double2* t = oskar_mem_double2(grid, &status);
double sum = 0.0;
for (int i = 0; i < grid_size; i++) sum += t[i].x;
ASSERT_DOUBLE_EQ((double)num_vis, sum);
// Finalise the image.
oskar_imager_finalise_plane(im, grid, plane_norm, &status);
ASSERT_EQ(0, status);
#ifdef WRITE_FITS
// Get the real part only.
if (oskar_mem_precision(grid) == OSKAR_DOUBLE)
{
double *t = oskar_mem_double(grid, &status);
for (int j = 0; j < grid_size; ++j) t[j] = t[2 * j];
}
else
{
float *t = oskar_mem_float(grid, &status);
for (int j = 0; j < grid_size; ++j) t[j] = t[2 * j];
}
// Save the real part.
fitsfile* f;
long naxes[2] = {size, size}, firstpix[2] = {1, 1};
fits_create_file(&f, "test_imager_grid_sum.fits", &status);
fits_create_img(f, (type == OSKAR_DOUBLE ? DOUBLE_IMG : FLOAT_IMG),
2, naxes, &status);
fits_write_pix(f, (type == OSKAR_DOUBLE ? TDOUBLE : TFLOAT),
firstpix, grid_size, oskar_mem_void(grid), &status);
fits_close_file(f, &status);
#endif
// Clean up.
oskar_imager_free(im, &status);
oskar_mem_free(uu, &status);
oskar_mem_free(vv, &status);
oskar_mem_free(ww, &status);
oskar_mem_free(vis, &status);
oskar_mem_free(weight, &status);
oskar_mem_free(grid, &status);
}
void oskar_vis_block_write_ms(const oskar_VisBlock* blk,
const oskar_VisHeader* header, oskar_MeasurementSet* ms, int* status)
{
const oskar_Mem *in_acorr, *in_xcorr, *in_uu, *in_vv, *in_ww;
oskar_Mem *temp_vis = 0, *temp_uu = 0, *temp_vv = 0, *temp_ww = 0;
double exposure_sec, interval_sec, t_start_mjd, t_start_sec;
double ra_rad, dec_rad, ref_freq_hz;
unsigned int a1, a2, num_baseln_in, num_baseln_out, num_channels;
unsigned int num_pols_in, num_pols_out, num_stations, num_times, b, c, t;
unsigned int i, i_out, prec, start_time_index, start_chan_index;
unsigned int have_autocorr, have_crosscorr;
const void *xcorr, *acorr;
void* out;
/* Check if safe to proceed. */
if (*status) return;
/* Pull data from visibility structures. */
num_pols_out = oskar_ms_num_pols(ms);
num_pols_in = oskar_vis_block_num_pols(blk);
num_stations = oskar_vis_block_num_stations(blk);
num_baseln_in = oskar_vis_block_num_baselines(blk);
num_channels = oskar_vis_block_num_channels(blk);
num_times = oskar_vis_block_num_times(blk);
in_acorr = oskar_vis_block_auto_correlations_const(blk);
in_xcorr = oskar_vis_block_cross_correlations_const(blk);
in_uu = oskar_vis_block_baseline_uu_metres_const(blk);
in_vv = oskar_vis_block_baseline_vv_metres_const(blk);
in_ww = oskar_vis_block_baseline_ww_metres_const(blk);
have_autocorr = oskar_vis_block_has_auto_correlations(blk);
have_crosscorr = oskar_vis_block_has_cross_correlations(blk);
start_time_index = oskar_vis_block_start_time_index(blk);
start_chan_index = oskar_vis_block_start_channel_index(blk);
ra_rad = oskar_vis_header_phase_centre_ra_deg(header) * D2R;
dec_rad = oskar_vis_header_phase_centre_dec_deg(header) * D2R;
exposure_sec = oskar_vis_header_time_average_sec(header);
interval_sec = oskar_vis_header_time_inc_sec(header);
t_start_mjd = oskar_vis_header_time_start_mjd_utc(header);
ref_freq_hz = oskar_vis_header_freq_start_hz(header);
prec = oskar_mem_precision(in_xcorr);
t_start_sec = t_start_mjd * 86400.0 +
interval_sec * (start_time_index + 0.5);
/* Check that there is something to write. */
if (!have_autocorr && !have_crosscorr) return;
/* Get number of output baselines. */
num_baseln_out = num_baseln_in;
if (have_autocorr)
num_baseln_out += num_stations;
/* Check polarisation dimension consistency:
* num_pols_in can be less than num_pols_out, but not vice-versa. */
if (num_pols_in > num_pols_out)
{
*status = OSKAR_ERR_DIMENSION_MISMATCH;
return;
}
/* Check the dimensions match. */
if (oskar_ms_num_pols(ms) != num_pols_out ||
oskar_ms_num_stations(ms) != num_stations)
{
*status = OSKAR_ERR_DIMENSION_MISMATCH;
return;
}
/* Check the reference frequencies match. */
if (fabs(oskar_ms_ref_freq_hz(ms) - ref_freq_hz) > 1e-10)
{
*status = OSKAR_ERR_VALUE_MISMATCH;
return;
}
/* Check the phase centres are the same. */
if (fabs(oskar_ms_phase_centre_ra_rad(ms) - ra_rad) > 1e-10 ||
fabs(oskar_ms_phase_centre_dec_rad(ms) - dec_rad) > 1e-10)
{
*status = OSKAR_ERR_VALUE_MISMATCH;
return;
}
/* Add visibilities and u,v,w coordinates. */
temp_vis = oskar_mem_create(prec | OSKAR_COMPLEX, OSKAR_CPU,
num_baseln_out * num_channels * num_pols_out, status);
temp_uu = oskar_mem_create(prec, OSKAR_CPU, num_baseln_out, status);
temp_vv = oskar_mem_create(prec, OSKAR_CPU, num_baseln_out, status);
temp_ww = oskar_mem_create(prec, OSKAR_CPU, num_baseln_out, status);
xcorr = oskar_mem_void_const(in_xcorr);
acorr = oskar_mem_void_const(in_acorr);
out = oskar_mem_void(temp_vis);
if (prec == OSKAR_DOUBLE)
{
const double *uu_in, *vv_in, *ww_in;
double *uu_out, *vv_out, *ww_out;
uu_in = oskar_mem_double_const(in_uu, status);
vv_in = oskar_mem_double_const(in_vv, status);
ww_in = oskar_mem_double_const(in_ww, status);
uu_out = oskar_mem_double(temp_uu, status);
vv_out = oskar_mem_double(temp_vv, status);
ww_out = oskar_mem_double(temp_ww, status);
for (t = 0; t < num_times; ++t)
{
/* Construct the baseline coordinates for the given time. */
int start_row = (start_time_index + t) * num_baseln_out;
for (a1 = 0, b = 0, i_out = 0; a1 < num_stations; ++a1)
{
if (have_autocorr)
{
uu_out[i_out] = 0.0;
vv_out[i_out] = 0.0;
ww_out[i_out] = 0.0;
++i_out;
}
if (have_crosscorr)
{
for (a2 = a1 + 1; a2 < num_stations; ++a2, ++b, ++i_out)
{
i = num_baseln_in * t + b;
uu_out[i_out] = uu_in[i];
vv_out[i_out] = vv_in[i];
ww_out[i_out] = ww_in[i];
}
}
}
for (c = 0, i_out = 0; c < num_channels; ++c)
{
/* Construct amplitude data for the given time and channel. */
if (num_pols_in == 4)
{
for (a1 = 0, b = 0; a1 < num_stations; ++a1)
{
if (have_autocorr)
{
i = num_stations * (t * num_channels + c) + a1;
((double4c*)out)[i_out++] =
((const double4c*)acorr)[i];
}
if (have_crosscorr)
{
for (a2 = a1 + 1; a2 < num_stations; ++b, ++a2)
{
i = num_baseln_in * (t * num_channels + c) + b;
((double4c*)out)[i_out++] =
((const double4c*)xcorr)[i];
}
}
}
}
else if (num_pols_in == 1 && num_pols_out == 1)
{
for (a1 = 0, b = 0; a1 < num_stations; ++a1)
{
if (have_autocorr)
{
i = num_stations * (t * num_channels + c) + a1;
((double2*)out)[i_out++] =
((const double2*)acorr)[i];
}
if (have_crosscorr)
{
for (a2 = a1 + 1; a2 < num_stations; ++b, ++a2)
{
i = num_baseln_in * (t * num_channels + c) + b;
((double2*)out)[i_out++] =
((const double2*)xcorr)[i];
}
}
}
}
else
{
double2 vis_amp, *out_;
out_ = (double2*)out;
for (a1 = 0, b = 0; a1 < num_stations; ++a1)
{
if (have_autocorr)
{
i = num_stations * (t * num_channels + c) + a1;
vis_amp = ((const double2*)acorr)[i];
out_[i_out + 0] = vis_amp; /* XX */
out_[i_out + 1].x = 0.0; /* XY */
out_[i_out + 1].y = 0.0; /* XY */
out_[i_out + 2].x = 0.0; /* YX */
out_[i_out + 2].y = 0.0; /* YX */
out_[i_out + 3] = vis_amp; /* YY */
i_out += 4;
}
if (have_crosscorr)
{
for (a2 = a1 + 1; a2 < num_stations; ++b, ++a2)
{
i = num_baseln_in * (t * num_channels + c) + b;
vis_amp = ((const double2*)xcorr)[i];
out_[i_out + 0] = vis_amp; /* XX */
out_[i_out + 1].x = 0.0; /* XY */
out_[i_out + 1].y = 0.0; /* XY */
out_[i_out + 2].x = 0.0; /* YX */
out_[i_out + 2].y = 0.0; /* YX */
out_[i_out + 3] = vis_amp; /* YY */
i_out += 4;
}
}
}
}
}
oskar_ms_write_coords_d(ms, start_row, num_baseln_out,
uu_out, vv_out, ww_out, exposure_sec, interval_sec,
t_start_sec + (t * interval_sec));
oskar_ms_write_vis_d(ms, start_row, start_chan_index,
num_channels, num_baseln_out, (const double*)out);
}
}
else if (prec == OSKAR_SINGLE)
{
const float *uu_in, *vv_in, *ww_in;
float *uu_out, *vv_out, *ww_out;
uu_in = oskar_mem_float_const(in_uu, status);
vv_in = oskar_mem_float_const(in_vv, status);
ww_in = oskar_mem_float_const(in_ww, status);
uu_out = oskar_mem_float(temp_uu, status);
vv_out = oskar_mem_float(temp_vv, status);
ww_out = oskar_mem_float(temp_ww, status);
for (t = 0; t < num_times; ++t)
{
/* Construct the baseline coordinates for the given time. */
int start_row = (start_time_index + t) * num_baseln_out;
for (a1 = 0, b = 0, i_out = 0; a1 < num_stations; ++a1)
{
if (have_autocorr)
{
uu_out[i_out] = 0.0;
vv_out[i_out] = 0.0;
ww_out[i_out] = 0.0;
++i_out;
}
if (have_crosscorr)
{
for (a2 = a1 + 1; a2 < num_stations; ++a2, ++b, ++i_out)
{
i = num_baseln_in * t + b;
uu_out[i_out] = uu_in[i];
vv_out[i_out] = vv_in[i];
ww_out[i_out] = ww_in[i];
}
}
}
for (c = 0, i_out = 0; c < num_channels; ++c)
{
/* Construct amplitude data for the given time and channel. */
if (num_pols_in == 4)
{
for (a1 = 0, b = 0; a1 < num_stations; ++a1)
{
if (have_autocorr)
{
i = num_stations * (t * num_channels + c) + a1;
((float4c*)out)[i_out++] =
((const float4c*)acorr)[i];
}
if (have_crosscorr)
{
for (a2 = a1 + 1; a2 < num_stations; ++b, ++a2)
{
i = num_baseln_in * (t * num_channels + c) + b;
((float4c*)out)[i_out++] =
((const float4c*)xcorr)[i];
}
}
}
}
else if (num_pols_in == 1 && num_pols_out == 1)
{
for (a1 = 0, b = 0; a1 < num_stations; ++a1)
{
if (have_autocorr)
{
i = num_stations * (t * num_channels + c) + a1;
((float2*)out)[i_out++] =
((const float2*)acorr)[i];
}
if (have_crosscorr)
{
for (a2 = a1 + 1; a2 < num_stations; ++b, ++a2)
{
i = num_baseln_in * (t * num_channels + c) + b;
((float2*)out)[i_out++] =
((const float2*)xcorr)[i];
}
}
}
}
else
{
float2 vis_amp, *out_;
out_ = (float2*)out;
for (a1 = 0, b = 0; a1 < num_stations; ++a1)
{
if (have_autocorr)
{
i = num_stations * (t * num_channels + c) + a1;
vis_amp = ((const float2*)acorr)[i];
out_[i_out + 0] = vis_amp; /* XX */
out_[i_out + 1].x = 0.0; /* XY */
out_[i_out + 1].y = 0.0; /* XY */
out_[i_out + 2].x = 0.0; /* YX */
out_[i_out + 2].y = 0.0; /* YX */
out_[i_out + 3] = vis_amp; /* YY */
i_out += 4;
}
if (have_crosscorr)
{
for (a2 = a1 + 1; a2 < num_stations; ++b, ++a2)
{
i = num_baseln_in * (t * num_channels + c) + b;
vis_amp = ((const float2*)xcorr)[i];
out_[i_out + 0] = vis_amp; /* XX */
out_[i_out + 1].x = 0.0; /* XY */
out_[i_out + 1].y = 0.0; /* XY */
out_[i_out + 2].x = 0.0; /* YX */
out_[i_out + 2].y = 0.0; /* YX */
out_[i_out + 3] = vis_amp; /* YY */
i_out += 4;
}
}
}
}
}
oskar_ms_write_coords_f(ms, start_row, num_baseln_out,
uu_out, vv_out, ww_out, exposure_sec, interval_sec,
t_start_sec + (t * interval_sec));
oskar_ms_write_vis_f(ms, start_row, start_chan_index,
num_channels, num_baseln_out, (const float*)out);
}
}
else
{
*status = OSKAR_ERR_BAD_DATA_TYPE;
}
/* Cleanup. */
oskar_mem_free(temp_vis, status);
oskar_mem_free(temp_uu, status);
oskar_mem_free(temp_vv, status);
oskar_mem_free(temp_ww, status);
}
void oskar_mem_evaluate_relative_error(const oskar_Mem* val_approx,
const oskar_Mem* val_accurate, double* min_rel_error,
double* max_rel_error, double* avg_rel_error, double* std_rel_error,
int* status)
{
int prec_approx, prec_accurate;
size_t i, n;
const oskar_Mem *app_ptr, *acc_ptr;
oskar_Mem *approx_temp = 0, *accurate_temp = 0;
double old_m = 0.0, new_m = 0.0, old_s = 0.0, new_s = 0.0;
/* Check if safe to proceed. */
if (*status) return;
/* Initialise outputs. */
if (max_rel_error) *max_rel_error = -DBL_MAX;
if (min_rel_error) *min_rel_error = DBL_MAX;
if (avg_rel_error) *avg_rel_error = DBL_MAX;
if (std_rel_error) *std_rel_error = DBL_MAX;
/* Type and dimension check. */
if (oskar_mem_is_matrix(val_approx) && !oskar_mem_is_matrix(val_accurate))
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
if (oskar_mem_is_complex(val_approx) && !oskar_mem_is_complex(val_accurate))
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
/* Get and check base types. */
prec_approx = oskar_mem_precision(val_approx);
prec_accurate = oskar_mem_precision(val_accurate);
if (prec_approx != OSKAR_SINGLE && prec_approx != OSKAR_DOUBLE)
{
*status = OSKAR_ERR_BAD_DATA_TYPE;
return;
}
if (prec_accurate != OSKAR_SINGLE && prec_accurate != OSKAR_DOUBLE)
{
*status = OSKAR_ERR_BAD_DATA_TYPE;
return;
}
/* Get number of elements to check. */
n = oskar_mem_length(val_approx) < oskar_mem_length(val_accurate) ?
oskar_mem_length(val_approx) : oskar_mem_length(val_accurate);
if (oskar_mem_is_matrix(val_approx)) n *= 4;
/* Copy input data to temporary CPU arrays if required. */
app_ptr = val_approx;
acc_ptr = val_accurate;
if (oskar_mem_location(val_approx) != OSKAR_CPU)
{
approx_temp = oskar_mem_create_copy(val_approx, OSKAR_CPU,
status);
if (*status)
{
oskar_mem_free(approx_temp, status);
return;
}
app_ptr = approx_temp;
}
if (oskar_mem_location(val_accurate) != OSKAR_CPU)
{
accurate_temp = oskar_mem_create_copy(val_accurate, OSKAR_CPU,
status);
if (*status)
{
oskar_mem_free(accurate_temp, status);
return;
}
acc_ptr = accurate_temp;
}
/* Check numbers are the same, to appropriate precision. */
if (prec_approx == OSKAR_SINGLE && prec_accurate == OSKAR_SINGLE)
{
const float *approx, *accurate;
approx = oskar_mem_float_const(app_ptr, status);
accurate = oskar_mem_float_const(acc_ptr, status);
CHECK_ELEMENTS(1e-5)
}
else if (prec_approx == OSKAR_DOUBLE && prec_accurate == OSKAR_SINGLE)
void oskar_auto_correlate(oskar_Mem* vis, int n_sources, const oskar_Jones* J,
const oskar_Sky* sky, int* status)
{
int jones_type, base_type, location, matrix_type, n_stations;
/* Check if safe to proceed. */
if (*status) return;
/* Get the data dimensions. */
n_stations = oskar_jones_num_stations(J);
/* Check data locations. */
location = oskar_sky_mem_location(sky);
if (oskar_jones_mem_location(J) != location ||
oskar_mem_location(vis) != location)
{
*status = OSKAR_ERR_LOCATION_MISMATCH;
return;
}
/* Check for consistent data types. */
jones_type = oskar_jones_type(J);
base_type = oskar_sky_precision(sky);
matrix_type = oskar_type_is_matrix(jones_type) &&
oskar_mem_is_matrix(vis);
if (oskar_mem_precision(vis) != base_type ||
oskar_type_precision(jones_type) != base_type)
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
if (oskar_mem_type(vis) != jones_type)
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
/* If neither single or double precision, return error. */
if (base_type != OSKAR_SINGLE && base_type != OSKAR_DOUBLE)
{
*status = OSKAR_ERR_BAD_DATA_TYPE;
return;
}
/* Check the input dimensions. */
if (oskar_jones_num_sources(J) < n_sources)
{
*status = OSKAR_ERR_DIMENSION_MISMATCH;
return;
}
/* Select kernel. */
if (base_type == OSKAR_DOUBLE)
{
const double *I_, *Q_, *U_, *V_;
I_ = oskar_mem_double_const(oskar_sky_I_const(sky), status);
Q_ = oskar_mem_double_const(oskar_sky_Q_const(sky), status);
U_ = oskar_mem_double_const(oskar_sky_U_const(sky), status);
V_ = oskar_mem_double_const(oskar_sky_V_const(sky), status);
if (matrix_type)
{
double4c *vis_;
const double4c *J_;
vis_ = oskar_mem_double4c(vis, status);
J_ = oskar_jones_double4c_const(J, status);
if (location == OSKAR_GPU)
{
#ifdef OSKAR_HAVE_CUDA
oskar_auto_correlate_cuda_d(n_sources, n_stations,
J_, I_, Q_, U_, V_, vis_);
oskar_device_check_error(status);
#else
*status = OSKAR_ERR_CUDA_NOT_AVAILABLE;
#endif
}
else /* CPU */
{
oskar_auto_correlate_omp_d(n_sources, n_stations,
J_, I_, Q_, U_, V_, vis_);
}
}
else /* Scalar version. */
{
double2 *vis_;
const double2 *J_;
vis_ = oskar_mem_double2(vis, status);
J_ = oskar_jones_double2_const(J, status);
if (location == OSKAR_GPU)
{
#ifdef OSKAR_HAVE_CUDA
oskar_auto_correlate_scalar_cuda_d(n_sources, n_stations,
J_, I_, vis_);
oskar_device_check_error(status);
#else
*status = OSKAR_ERR_CUDA_NOT_AVAILABLE;
#endif
}
else /* CPU */
{
oskar_auto_correlate_scalar_omp_d(n_sources, n_stations,
J_, I_, vis_);
}
}
}
else /* Single precision. */
{
const float *I_, *Q_, *U_, *V_;
I_ = oskar_mem_float_const(oskar_sky_I_const(sky), status);
Q_ = oskar_mem_float_const(oskar_sky_Q_const(sky), status);
U_ = oskar_mem_float_const(oskar_sky_U_const(sky), status);
V_ = oskar_mem_float_const(oskar_sky_V_const(sky), status);
if (matrix_type)
{
float4c *vis_;
const float4c *J_;
vis_ = oskar_mem_float4c(vis, status);
J_ = oskar_jones_float4c_const(J, status);
if (location == OSKAR_GPU)
{
#ifdef OSKAR_HAVE_CUDA
oskar_auto_correlate_cuda_f(n_sources, n_stations,
J_, I_, Q_, U_, V_, vis_);
oskar_device_check_error(status);
#else
*status = OSKAR_ERR_CUDA_NOT_AVAILABLE;
#endif
}
else /* CPU */
{
oskar_auto_correlate_omp_f(n_sources, n_stations,
J_, I_, Q_, U_, V_, vis_);
}
}
else /* Scalar version. */
{
float2 *vis_;
const float2 *J_;
vis_ = oskar_mem_float2(vis, status);
J_ = oskar_jones_float2_const(J, status);
if (location == OSKAR_GPU)
{
#ifdef OSKAR_HAVE_CUDA
oskar_auto_correlate_scalar_cuda_f(n_sources, n_stations,
J_, I_, vis_);
oskar_device_check_error(status);
#else
*status = OSKAR_ERR_CUDA_NOT_AVAILABLE;
#endif
}
else /* CPU */
{
oskar_auto_correlate_scalar_omp_f(n_sources, n_stations,
J_, I_, vis_);
}
}
}
}
oskar_Sky* oskar_sky_from_image(int precision, const oskar_Mem* image,
int image_width, int image_height, double image_ra_deg,
double image_dec_deg, double image_cellsize_deg, double image_freq_hz,
double spectral_index, int* status)
{
int i, type, x, y;
double crval[2], crpix[2], cdelt[2], val;
oskar_Sky* sky;
/* Check if safe to proceed. */
if (*status) return 0;
/* Check the image size is even. */
if ((image_width % 2) || (image_height % 2))
{
*status = OSKAR_ERR_INVALID_ARGUMENT;
return 0;
}
/* Get reference pixels and reference values in radians. */
crpix[0] = image_width / 2 + 1;
crpix[1] = image_height / 2 + 1;
crval[0] = image_ra_deg * M_PI / 180.0;
crval[1] = image_dec_deg * M_PI / 180.0;
/* Compute sine of pixel deltas for inverse orthographic projection. */
cdelt[0] = -sin(image_cellsize_deg * M_PI / 180.0);
cdelt[1] = -cdelt[0];
/* Create a sky model. */
sky = oskar_sky_create(precision, OSKAR_CPU, 0, status);
/* Store the image pixels. */
type = oskar_mem_precision(image);
if (type == OSKAR_SINGLE)
{
const float *img = oskar_mem_float_const(image, status);
for (y = 0, i = 0; y < image_height; ++y)
{
for (x = 0; x < image_width; ++x)
{
/* Check pixel value. */
val = (double) (img[image_width * y + x]);
if (val == 0.0)
continue;
set_pixel(sky, i++, x, y, val, crval, crpix, cdelt,
image_freq_hz, spectral_index, status);
}
}
}
else
{
const double *img = oskar_mem_double_const(image, status);
for (y = 0, i = 0; y < image_height; ++y)
{
for (x = 0; x < image_width; ++x)
{
/* Check pixel value. */
val = img[image_width * y + x];
if (val == 0.0)
continue;
set_pixel(sky, i++, x, y, val, crval, crpix, cdelt,
image_freq_hz, spectral_index, status);
}
}
}
/* Return the sky model. */
oskar_sky_resize(sky, i, status);
return sky;
}
void oskar_evaluate_vla_beam_pbcor(oskar_Mem* beam, int num_sources,
const oskar_Mem* l, const oskar_Mem* m, double frequency_hz,
int* status)
{
int index, precision, type, location;
double f, p1, p2, p3;
/* Check if safe to proceed. */
if (*status) return;
/* Check type and location. */
precision = oskar_mem_precision(beam);
type = oskar_mem_type(beam);
location = oskar_mem_location(beam);
if (precision != oskar_mem_type(l) || precision != oskar_mem_type(m))
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
if (location != oskar_mem_location(l) || location != oskar_mem_location(m))
{
*status = OSKAR_ERR_LOCATION_MISMATCH;
return;
}
/* Find the nearest frequency at which data exists. */
index = oskar_find_closest_match_d(frequency_hz / 1.0e9,
sizeof(freqs_ghz) / sizeof(double), freqs_ghz);
f = frequency_hz / 1.0e9;
p1 = p1s[index];
p2 = p2s[index];
p3 = p3s[index];
/* Switch on precision. */
if (precision == OSKAR_SINGLE)
{
const float *l_, *m_;
l_ = oskar_mem_float_const(l, status);
m_ = oskar_mem_float_const(m, status);
if (location == OSKAR_GPU)
{
#ifdef OSKAR_HAVE_CUDA
if (type == OSKAR_SINGLE)
{
oskar_evaluate_vla_beam_pbcor_cuda_f(
oskar_mem_float(beam, status),
num_sources, l_, m_, f, p1, p2, p3);
}
else if (type == OSKAR_SINGLE_COMPLEX)
{
oskar_evaluate_vla_beam_pbcor_complex_cuda_f(
oskar_mem_float2(beam, status),
num_sources, l_, m_, f, p1, p2, p3);
}
else if (type == OSKAR_SINGLE_COMPLEX_MATRIX)
{
oskar_evaluate_vla_beam_pbcor_matrix_cuda_f(
oskar_mem_float4c(beam, status),
num_sources, l_, m_, f, p1, p2, p3);
}
oskar_device_check_error(status);
#else
*status = OSKAR_ERR_CUDA_NOT_AVAILABLE;
#endif
}
else if (location == OSKAR_CPU)
{
if (type == OSKAR_SINGLE)
{
oskar_evaluate_vla_beam_pbcor_f(
oskar_mem_float(beam, status),
num_sources, l_, m_, f, p1, p2, p3);
}
else if (type == OSKAR_SINGLE_COMPLEX)
{
oskar_evaluate_vla_beam_pbcor_complex_f(
oskar_mem_float2(beam, status),
num_sources, l_, m_, f, p1, p2, p3);
}
else if (type == OSKAR_SINGLE_COMPLEX_MATRIX)
{
oskar_evaluate_vla_beam_pbcor_matrix_f(
oskar_mem_float4c(beam, status),
num_sources, l_, m_, f, p1, p2, p3);
}
}
}
else if (precision == OSKAR_DOUBLE)
{
const double *l_, *m_;
l_ = oskar_mem_double_const(l, status);
m_ = oskar_mem_double_const(m, status);
if (location == OSKAR_GPU)
{
#ifdef OSKAR_HAVE_CUDA
if (type == OSKAR_DOUBLE)
{
oskar_evaluate_vla_beam_pbcor_cuda_d(
oskar_mem_double(beam, status),
num_sources, l_, m_, f, p1, p2, p3);
}
else if (type == OSKAR_DOUBLE_COMPLEX)
{
oskar_evaluate_vla_beam_pbcor_complex_cuda_d(
oskar_mem_double2(beam, status),
num_sources, l_, m_, f, p1, p2, p3);
}
else if (type == OSKAR_DOUBLE_COMPLEX_MATRIX)
{
oskar_evaluate_vla_beam_pbcor_matrix_cuda_d(
oskar_mem_double4c(beam, status),
num_sources, l_, m_, f, p1, p2, p3);
}
oskar_device_check_error(status);
#else
*status = OSKAR_ERR_CUDA_NOT_AVAILABLE;
#endif
}
else if (location == OSKAR_CPU)
{
if (type == OSKAR_DOUBLE)
{
oskar_evaluate_vla_beam_pbcor_d(
oskar_mem_double(beam, status),
num_sources, l_, m_, f, p1, p2, p3);
}
else if (type == OSKAR_DOUBLE_COMPLEX)
{
oskar_evaluate_vla_beam_pbcor_complex_d(
oskar_mem_double2(beam, status),
num_sources, l_, m_, f, p1, p2, p3);
}
else if (type == OSKAR_DOUBLE_COMPLEX_MATRIX)
{
oskar_evaluate_vla_beam_pbcor_matrix_d(
oskar_mem_double4c(beam, status),
num_sources, l_, m_, f, p1, p2, p3);
}
}
}
else
{
*status = OSKAR_ERR_BAD_DATA_TYPE;
}
}
void oskar_evaluate_station_beam_gaussian(oskar_Mem* beam,
int num_points, const oskar_Mem* l, const oskar_Mem* m,
const oskar_Mem* horizon_mask, double fwhm_rad, int* status)
{
int type, location;
double fwhm_lm, std;
/* Check if safe to proceed. */
if (*status) return;
/* Get type and check consistency. */
type = oskar_mem_precision(beam);
if (type != oskar_mem_type(l) || type != oskar_mem_type(m))
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
if (type != OSKAR_SINGLE && type != OSKAR_DOUBLE)
{
*status = OSKAR_ERR_BAD_DATA_TYPE;
return;
}
if (!oskar_mem_is_complex(beam))
{
*status = OSKAR_ERR_BAD_DATA_TYPE;
return;
}
if (fwhm_rad == 0.0)
{
*status = OSKAR_ERR_SETTINGS_TELESCOPE;
return;
}
/* Get location and check consistency. */
location = oskar_mem_location(beam);
if (location != oskar_mem_location(l) ||
location != oskar_mem_location(m))
{
*status = OSKAR_ERR_LOCATION_MISMATCH;
return;
}
/* Check that length of input arrays are consistent. */
if ((int)oskar_mem_length(l) < num_points ||
(int)oskar_mem_length(m) < num_points)
{
*status = OSKAR_ERR_DIMENSION_MISMATCH;
return;
}
/* Resize output array if needed. */
if ((int)oskar_mem_length(beam) < num_points)
oskar_mem_realloc(beam, num_points, status);
/* Check if safe to proceed. */
if (*status) return;
/* Compute Gaussian standard deviation from FWHM. */
fwhm_lm = sin(fwhm_rad);
std = fwhm_lm / (2.0 * sqrt(2.0 * log(2.0)));
if (type == OSKAR_DOUBLE)
{
const double *l_, *m_;
l_ = oskar_mem_double_const(l, status);
m_ = oskar_mem_double_const(m, status);
if (location == OSKAR_CPU)
{
if (oskar_mem_is_scalar(beam))
{
oskar_gaussian_d(oskar_mem_double2(beam, status),
num_points, l_, m_, std);
}
else
{
oskar_gaussian_md(oskar_mem_double4c(beam, status),
num_points, l_, m_, std);
}
}
else
{
#ifdef OSKAR_HAVE_CUDA
if (oskar_mem_is_scalar(beam))
{
oskar_gaussian_cuda_d(oskar_mem_double2(beam, status),
num_points, l_, m_, std);
}
else
{
oskar_gaussian_cuda_md(oskar_mem_double4c(beam, status),
num_points, l_, m_, std);
}
oskar_device_check_error(status);
#else
*status = OSKAR_ERR_CUDA_NOT_AVAILABLE;
#endif
}
}
else /* type == OSKAR_SINGLE */
{
const float *l_, *m_;
l_ = oskar_mem_float_const(l, status);
m_ = oskar_mem_float_const(m, status);
if (location == OSKAR_CPU)
{
if (oskar_mem_is_scalar(beam))
{
oskar_gaussian_f(oskar_mem_float2(beam, status), num_points,
l_, m_, (float)std);
}
else
{
oskar_gaussian_mf(oskar_mem_float4c(beam, status), num_points,
l_, m_, (float)std);
}
}
else
{
#ifdef OSKAR_HAVE_CUDA
if (oskar_mem_is_scalar(beam))
{
oskar_gaussian_cuda_f(oskar_mem_float2(beam, status),
num_points, l_, m_, (float)std);
}
else
{
oskar_gaussian_cuda_mf(oskar_mem_float4c(beam, status),
num_points, l_, m_, (float)std);
}
oskar_device_check_error(status);
#else
*status = OSKAR_ERR_CUDA_NOT_AVAILABLE;
#endif
}
}
/* Blank (zero) sources below the horizon. */
oskar_blank_below_horizon(beam, horizon_mask, num_points, status);
}
/* Wrapper. */
void oskar_evaluate_jones_R(oskar_Jones* R, int num_sources,
const oskar_Mem* ra_rad, const oskar_Mem* dec_rad,
const oskar_Telescope* telescope, double gast, int* status)
{
int i, n, num_stations, jones_type, base_type, location;
double latitude, lst;
oskar_Mem *R_station;
/* Check if safe to proceed. */
if (*status) return;
/* Get the Jones matrix block meta-data. */
jones_type = oskar_jones_type(R);
base_type = oskar_type_precision(jones_type);
location = oskar_jones_mem_location(R);
num_stations = oskar_jones_num_stations(R);
n = (oskar_telescope_allow_station_beam_duplication(telescope) ? 1 : num_stations);
/* Check that the data dimensions are OK. */
if (num_sources > (int)oskar_mem_length(ra_rad) ||
num_sources > (int)oskar_mem_length(dec_rad) ||
num_sources > oskar_jones_num_sources(R) ||
num_stations != oskar_telescope_num_stations(telescope))
{
*status = OSKAR_ERR_DIMENSION_MISMATCH;
return;
}
/* Check that the data is in the right location. */
if (location != oskar_mem_location(ra_rad) ||
location != oskar_mem_location(dec_rad))
{
*status = OSKAR_ERR_LOCATION_MISMATCH;
return;
}
/* Check that the data is of the right type. */
if (!oskar_type_is_matrix(jones_type))
{
*status = OSKAR_ERR_BAD_DATA_TYPE;
return;
}
if (base_type != oskar_mem_precision(ra_rad) ||
base_type != oskar_mem_precision(dec_rad))
{
*status = OSKAR_ERR_TYPE_MISMATCH;
return;
}
/* Evaluate Jones matrix for each source for appropriate stations. */
R_station = oskar_mem_create_alias(0, 0, 0, status);
if (location == OSKAR_GPU)
{
#ifdef OSKAR_HAVE_CUDA
for (i = 0; i < n; ++i)
{
const oskar_Station* station;
/* Get station data. */
station = oskar_telescope_station_const(telescope, i);
latitude = oskar_station_lat_rad(station);
lst = gast + oskar_station_lon_rad(station);
oskar_jones_get_station_pointer(R_station, R, i, status);
/* Evaluate source parallactic angles. */
if (base_type == OSKAR_SINGLE)
{
oskar_evaluate_jones_R_cuda_f(
oskar_mem_float4c(R_station, status), num_sources,
oskar_mem_float_const(ra_rad, status),
oskar_mem_float_const(dec_rad, status),
(float)latitude, (float)lst);
}
else if (base_type == OSKAR_DOUBLE)
{
oskar_evaluate_jones_R_cuda_d(
oskar_mem_double4c(R_station, status), num_sources,
oskar_mem_double_const(ra_rad, status),
oskar_mem_double_const(dec_rad, status),
latitude, lst);
}
}
oskar_device_check_error(status);
#else
*status = OSKAR_ERR_CUDA_NOT_AVAILABLE;
#endif
}
else if (location == OSKAR_CPU)
{
for (i = 0; i < n; ++i)
{
const oskar_Station* station;
/* Get station data. */
station = oskar_telescope_station_const(telescope, i);
latitude = oskar_station_lat_rad(station);
lst = gast + oskar_station_lon_rad(station);
oskar_jones_get_station_pointer(R_station, R, i, status);
/* Evaluate source parallactic angles. */
if (base_type == OSKAR_SINGLE)
{
oskar_evaluate_jones_R_f(
oskar_mem_float4c(R_station, status), num_sources,
oskar_mem_float_const(ra_rad, status),
oskar_mem_float_const(dec_rad, status),
(float)latitude, (float)lst);
}
else if (base_type == OSKAR_DOUBLE)
{
oskar_evaluate_jones_R_d(
oskar_mem_double4c(R_station, status), num_sources,
oskar_mem_double_const(ra_rad, status),
oskar_mem_double_const(dec_rad, status),
latitude, lst);
}
}
}
/* Copy data for station 0 to stations 1 to n, if using a common sky. */
if (oskar_telescope_allow_station_beam_duplication(telescope))
{
oskar_Mem* R0;
R0 = oskar_mem_create_alias(0, 0, 0, status);
oskar_jones_get_station_pointer(R0, R, 0, status);
for (i = 1; i < num_stations; ++i)
{
oskar_jones_get_station_pointer(R_station, R, i, status);
oskar_mem_copy_contents(R_station, R0, 0, 0,
oskar_mem_length(R0), status);
}
oskar_mem_free(R0, status);
}
oskar_mem_free(R_station, status);
}
