static PyObject* num_pols(PyObject* self, PyObject* args) { oskar_MeasurementSet* h = 0; PyObject* capsule = 0; if (!PyArg_ParseTuple(args, "O", &capsule)) return 0; if (!(h = (oskar_MeasurementSet*) get_handle(capsule, name))) return 0; return Py_BuildValue("i", oskar_ms_num_pols(h)); }
static PyObject* write_vis(PyObject* self, PyObject* args) { oskar_MeasurementSet* h = 0; PyObject *capsule = 0; PyObject *obj = 0; PyArrayObject *vis = 0; int start_row = 0, start_channel = 0; int num_channels = 0, num_baselines = 0, num_pols = 0; if (!PyArg_ParseTuple(args, "OiiiiO", &capsule, &start_row, &start_channel, &num_channels, &num_baselines, &obj)) return 0; if (!(h = get_handle(capsule))) return 0; /* Make sure input objects are arrays. Convert if required. */ vis = (PyArrayObject*) PyArray_FROM_OF(obj, NPY_ARRAY_IN_ARRAY); if (!vis) goto fail; /* Get precision of complex visibility data. */ if (!PyArray_ISCOMPLEX(vis)) { PyErr_SetString(PyExc_RuntimeError, "Input visibility data must be complex."); goto fail; } /* Check dimensions. */ num_pols = oskar_ms_num_pols(h); if (num_baselines * num_channels * num_pols != (int) PyArray_SIZE(vis)) { PyErr_SetString(PyExc_RuntimeError, "Input data dimension mismatch."); goto fail; } /* Allow threads. */ Py_BEGIN_ALLOW_THREADS /* Write the visibilities. */ if (PyArray_TYPE(vis) == NPY_DOUBLE) oskar_ms_write_vis_d(h, start_row, start_channel, num_channels, num_baselines, (const double*)PyArray_DATA(vis)); else oskar_ms_write_vis_f(h, start_row, start_channel, num_channels, num_baselines, (const float*)PyArray_DATA(vis)); /* Disallow threads. */ Py_END_ALLOW_THREADS Py_XDECREF(vis); return Py_BuildValue(""); fail: Py_XDECREF(vis); return 0; }
static PyObject* read_vis(PyObject* self, PyObject* args) { oskar_MeasurementSet* h = 0; PyObject *capsule = 0; PyArrayObject *vis = 0; npy_intp dims[3]; int start_row = 0, num_baselines = 0; int start_channel = 0, num_channels = 0, status = 0; const char* column_name = 0; if (!PyArg_ParseTuple(args, "Oiiiis", &capsule, &start_row, &start_channel, &num_channels, &num_baselines, &column_name)) return 0; if (!(h = get_handle(capsule))) return 0; /* Create numpy array to return. */ dims[0] = num_channels; dims[1] = num_baselines; dims[2] = oskar_ms_num_pols(h); vis = (PyArrayObject*)PyArray_SimpleNew(3, dims, NPY_CFLOAT); /* Allow threads. */ Py_BEGIN_ALLOW_THREADS /* Read the visibility data. */ oskar_ms_read_vis_f(h, start_row, start_channel, num_channels, num_baselines, column_name, (float*)PyArray_DATA(vis), &status); /* Disallow threads. */ Py_END_ALLOW_THREADS /* Check for errors. */ if (status) { PyErr_Format(PyExc_RuntimeError, "oskar_ms_read_vis() failed with code %d.", status); Py_XDECREF(vis); return 0; } /* Return the data. */ return Py_BuildValue("N", vis); /* Don't increment refcount. */ }
void oskar_imager_read_coords_ms(oskar_Imager* h, const char* filename, int i_file, int num_files, int* percent_done, int* percent_next, int* status) { #ifndef OSKAR_NO_MS oskar_MeasurementSet* ms; oskar_Mem *uvw, *u, *v, *w, *weight, *time_centroid; int num_channels, num_stations, num_baselines, num_pols; int start_row, num_rows; double *uvw_, *u_, *v_, *w_; if (*status) return; /* Read the header. */ ms = oskar_ms_open(filename); if (!ms) { *status = OSKAR_ERR_FILE_IO; return; } num_rows = (int) oskar_ms_num_rows(ms); num_stations = (int) oskar_ms_num_stations(ms); num_baselines = num_stations * (num_stations - 1) / 2; num_pols = (int) oskar_ms_num_pols(ms); num_channels = (int) oskar_ms_num_channels(ms); /* Set visibility meta-data. */ oskar_imager_set_vis_frequency(h, oskar_ms_freq_start_hz(ms), oskar_ms_freq_inc_hz(ms), num_channels); oskar_imager_set_vis_phase_centre(h, oskar_ms_phase_centre_ra_rad(ms) * 180/M_PI, oskar_ms_phase_centre_dec_rad(ms) * 180/M_PI); /* Create arrays. */ uvw = oskar_mem_create(OSKAR_DOUBLE, OSKAR_CPU, 3 * num_baselines, status); u = oskar_mem_create(OSKAR_DOUBLE, OSKAR_CPU, num_baselines, status); v = oskar_mem_create(OSKAR_DOUBLE, OSKAR_CPU, num_baselines, status); w = oskar_mem_create(OSKAR_DOUBLE, OSKAR_CPU, num_baselines, status); weight = oskar_mem_create(OSKAR_SINGLE, OSKAR_CPU, num_baselines * num_pols, status); time_centroid = oskar_mem_create(OSKAR_DOUBLE, OSKAR_CPU, num_baselines, status); uvw_ = oskar_mem_double(uvw, status); u_ = oskar_mem_double(u, status); v_ = oskar_mem_double(v, status); w_ = oskar_mem_double(w, status); /* Loop over visibility blocks. */ for (start_row = 0; start_row < num_rows; start_row += num_baselines) { int i, block_size; size_t allocated, required; if (*status) break; /* Read coordinates and weights from Measurement Set. */ oskar_timer_resume(h->tmr_read); block_size = num_rows - start_row; if (block_size > num_baselines) block_size = num_baselines; allocated = oskar_mem_length(uvw) * oskar_mem_element_size(oskar_mem_type(uvw)); oskar_ms_read_column(ms, "UVW", start_row, block_size, allocated, oskar_mem_void(uvw), &required, status); allocated = oskar_mem_length(weight) * oskar_mem_element_size(oskar_mem_type(weight)); oskar_ms_read_column(ms, "WEIGHT", start_row, block_size, allocated, oskar_mem_void(weight), &required, status); allocated = oskar_mem_length(time_centroid) * oskar_mem_element_size(oskar_mem_type(time_centroid)); oskar_ms_read_column(ms, "TIME_CENTROID", start_row, block_size, allocated, oskar_mem_void(time_centroid), &required, status); /* Split up baseline coordinates. */ for (i = 0; i < block_size; ++i) { u_[i] = uvw_[3*i + 0]; v_[i] = uvw_[3*i + 1]; w_[i] = uvw_[3*i + 2]; } /* Update the imager with the data. */ oskar_timer_pause(h->tmr_read); oskar_imager_update(h, block_size, 0, num_channels - 1, num_pols, u, v, w, 0, weight, time_centroid, status); *percent_done = (int) round(100.0 * ( (start_row + block_size) / (double)(num_rows * num_files) + i_file / (double)num_files)); if (h->log && percent_next && *percent_done >= *percent_next) { oskar_log_message(h->log, 'S', -2, "%3d%% ...", *percent_done); *percent_next = 10 + 10 * (*percent_done / 10); } } oskar_mem_free(uvw, status); oskar_mem_free(u, status); oskar_mem_free(v, status); oskar_mem_free(w, status); oskar_mem_free(weight, status); oskar_mem_free(time_centroid, status); oskar_ms_close(ms); #else (void) filename; (void) i_file; (void) num_files; (void) percent_done; (void) percent_next; oskar_log_error(h->log, "OSKAR was compiled without Measurement Set support."); *status = OSKAR_ERR_FUNCTION_NOT_AVAILABLE; #endif }
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); }