rawspec_file.c

#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#include "rawspec_file.h"
#include "fbh5_defs.h"

// Open a single Filterbank file for one of the following:
//   * nants = 0
//   * a single antenna of a set
//   * ICS
int open_output_file(callback_data_t *cb_data, const char * dest, const char *stem, int output_idx, int antenna_index)
{
  int fd;
  const char * basename;
  char fname[PATH_MAX+1];
  char fileext[4] = {'\0'};
  int retcode;

  // If dest is given and it's not empty
  if(cb_data->flag_fbh5_output)
      strcpy(fileext, "h5");
  else
      strcpy(fileext, "fil");
  if(dest && dest[0]) {
    // Look for last '/' in stem
    basename = strrchr(stem, '/');
    if(basename) {
      // If found, advance beyond it to first char of basename
      basename++;
    } else {
      // If not found, use stem as basename
      basename = stem;
    }
    snprintf(fname, PATH_MAX, "%s/%s.rawspec.%04d.%s", dest, basename, output_idx, fileext);
  } else {
    snprintf(fname, PATH_MAX, "%s.rawspec.%04d.%s", stem, output_idx, fileext);
  }
  fname[PATH_MAX] = '\0';
  if(cb_data->flag_fbh5_output) {
      // Open an FBH5 output file.
      // If antenna_index < 0, then use the ICS context;
      // Else, use the indicated antenna context.
      if(antenna_index < 0)
          cb_data->exit_soon = fbh5_open(&(cb_data->fbh5_ctx_ics), &(cb_data->fb_hdr), 
                                         cb_data->Nds, fname, cb_data->debug_callback);
      else
          cb_data->exit_soon = fbh5_open(&(cb_data->fbh5_ctx_ant[antenna_index]), &(cb_data->fb_hdr),
                                         cb_data->Nds, fname, cb_data->debug_callback);
      if(cb_data->exit_soon != 0)
          return -1;  // Indicate that fbh5_open failed.
      if(cb_data->debug_callback)
          printf("open_output_file: fbh5_open(%s) successful\n", fname);
      return ENABLER_FD_FOR_FBH5;
  }

  // Open a SIGPROC Filterbank output file.
  fd = open(fname, O_WRONLY | O_CREAT | O_TRUNC, 0664);
  if(fd == -1) {
    cb_data->exit_soon = 1;
    perror(fname);
  } else {
    posix_fadvise(fd, 0, 0, POSIX_FADV_DONTNEED);
  }
  return fd;
}

// Open one or more output Filterbank files for the following cases:
//   * nants = 0
//   * the set of antennas when nants > 0
int open_output_file_per_antenna_and_write_header(callback_data_t *cb_data, const char * dest, const char * stem, int output_idx)
{
  char ant_stem[PATH_MAX+1];
    
  for(int i = 0; i < (cb_data->per_ant_out ? cb_data->Nant : 1); i++) {
    if(cb_data->per_ant_out) {
      snprintf(ant_stem, PATH_MAX, "%s-ant%03d", stem, i);
    }
    else {
      snprintf(ant_stem, PATH_MAX, "%s", stem);
    }

    cb_data->fd[i] = open_output_file(cb_data, dest, ant_stem, output_idx, i);
    if(cb_data->fd[i] < 0) {
      // If we can't open this output file, we probably won't be able to
      // open any more output files, so print message and bail out.
      fprintf(stderr, "cannot open output file, giving up\n");
      cb_data->exit_soon = 1;
      return 1; // Give up
    }

    // Write filterbank header to output file if SIGPROC.
    if(! cb_data->flag_fbh5_output)
        fb_fd_write_header(cb_data->fd[i], &cb_data->fb_hdr);
  }
  return 0;
}

void * dump_file_thread_func(void *arg)
{
  callback_data_t * cb_data = (callback_data_t *)arg;
  int retcode;

  // Single antenna case
  if(cb_data->fd && cb_data->h_pwrbuf && (cb_data->Nant == 1)) {
      if(cb_data->debug_callback)
        printf("dump_file_thread_func: write for nants=0\n");
      if(cb_data->flag_fbh5_output) {
        retcode = fbh5_write(&(cb_data->fbh5_ctx_ant[0]),
                   &(cb_data->fb_hdr), 
                   cb_data->h_pwrbuf, 
                   cb_data->h_pwrbuf_size,
                   cb_data->debug_callback);
        if(retcode != 0) {
            cb_data->exit_soon = 1;
            cb_data->output_thread_valid = 0;
        }
      } else { // SIGPROC Filterbank
        if(write(cb_data->fd[0], 
              cb_data->h_pwrbuf, 
              cb_data->h_pwrbuf_size) < 0) {
            cb_data->exit_soon = 1;
            cb_data->output_thread_valid = 0;
            fprintf(stderr, "SIGPROC-WRITE-ERROR\n");
        }
      } // if(cb_data->flag_fbh5_output) 
  }

  // Multiple antennas, split output
  if(cb_data->fd && cb_data->h_pwrbuf && (cb_data->Nant > 1)) {
    if(cb_data->per_ant_out) {
      size_t spectra_stride = cb_data->h_pwrbuf_size / (cb_data->Nds * sizeof(float));
      size_t pol_stride = spectra_stride / cb_data->fb_hdr.nifs;
      size_t ant_stride = pol_stride / cb_data->Nant;

      for(size_t k = 0; k < cb_data->Nds; k++){// Spectra out
        for(size_t j = 0; j < cb_data->fb_hdr.nifs; j++){// Npolout
          for(size_t i = 0; i < cb_data->Nant; i++){ 
            if(cb_data->fd[i] == -1){
              // Assume that the following file-descriptors aren't valid
              break;
            }
            if(cb_data->debug_callback)
                printf("dump_file_thread_func: write for antenna %ld-%ld-%ld\n", k, j, i);
            if(cb_data->flag_fbh5_output) {
                retcode = fbh5_write(&(cb_data->fbh5_ctx_ant[i]),
                           &(cb_data->fb_hdr), 
                           cb_data->h_pwrbuf + i * ant_stride + j * pol_stride + k * spectra_stride, 
                           ant_stride * sizeof(float),
                           cb_data->debug_callback);
                if(retcode != 0) {
                    cb_data->exit_soon = 1;
                    cb_data->output_thread_valid = 0;
                }
            } else { // SIGPROC Filterbank
                if(write(cb_data->fd[i], 
                      cb_data->h_pwrbuf + i * ant_stride + j * pol_stride + k * spectra_stride, 
                      ant_stride * sizeof(float)) < 0) {
                  cb_data->exit_soon = 1;
                  cb_data->output_thread_valid = 0;
                  fprintf(stderr, "SIGPROC-WRITE-ERROR\n");
                }
            } // if(cb_data->flag_fbh5_output)
          } // for(size_t i = 0; i < cb_data->Nant; i++)
        } // for(size_t j = 0; j < cb_data->fb_hdr.nifs; j++)
      } // for(size_t k = 0; k < cb_data->Nds; k++)
    } // if(cb_data->per_ant_out)
  } // if(cb_data->fd && cb_data->h_pwrbuf)

  // Multiple antennas, ICS output
  if(cb_data->fd_ics && cb_data->h_icsbuf) {
    if(cb_data->debug_callback)
        printf("dump_file_thread_func: write for ICS\n");
    if(cb_data->flag_fbh5_output) {
        retcode = fbh5_write(&(cb_data->fbh5_ctx_ics),
                   &(cb_data->fb_hdr), 
                   cb_data->h_icsbuf,
                   cb_data->h_pwrbuf_size/cb_data->Nant,
                   cb_data->debug_callback);
        if(retcode != 0) {
            cb_data->exit_soon = 1;
            cb_data->output_thread_valid = 0;
        }
    } else { // SIGPROC Filterbank
        if(write(cb_data->fd_ics, 
              cb_data->h_icsbuf, 
              cb_data->h_pwrbuf_size/cb_data->Nant) < 0) {
            cb_data->exit_soon = 1;
            cb_data->output_thread_valid = 0;
            fprintf(stderr, "SIGPROC-WRITE-ERROR\n");
        }
    }
  }

  // Increment total spectra counter for this output product
  cb_data->total_spectra += cb_data->Nds;

  return NULL;
}

void dump_file_callback(
    rawspec_context * ctx,
    int output_product,
    int callback_type)
{
  int i;
  int rc;
  callback_data_t * cb_data =
    &((callback_data_t *)ctx->user_data)[output_product];
  
  ctx->exit_soon = cb_data->exit_soon;

  if(callback_type == RAWSPEC_CALLBACK_PRE_DUMP) {
    if(cb_data->output_thread_valid) {
      // Join output thread
      if((rc=pthread_join(cb_data->output_thread, NULL))) {
        fprintf(stderr, "pthread_join: %s\n", strerror(rc));
      }
      // Flag thread as invalid
      cb_data->output_thread_valid = 0;
    }
  } else if(callback_type == RAWSPEC_CALLBACK_POST_DUMP) {
      
#ifdef VERBOSE
    fprintf(stderr, "cb %d writing %lu bytes:",
        output_product, ctx->h_pwrbuf_size[output_product]);
    for(i=0; i<16; i++) {
      fprintf(stderr, " %02x",
          ((char *)ctx->h_pwrbuf[output_product])[i] & 0xff);
    }
    fprintf(stderr, "\n");
#endif // VERBOSE
      
    if((rc=pthread_create(&cb_data->output_thread, NULL,
                      dump_file_thread_func, cb_data))) {
      fprintf(stderr, "pthread_create: %s\n", strerror(rc));
    } else {
      cb_data->output_thread_valid = 1;
    }
  }
}