libsent/src/adin/adin_esd.c

説明を見る。

/*
 * Copyright (c) 2004-2005 Shikano Lab., Nara Institute of Science and Technology
 * Copyright (c) 2005-2007 Julius project team, Nagoya Institute of Technology
 * All rights reserved
 */

#include <sent/stddefs.h>
#include <sent/adin.h>

#ifdef HAS_ESD

#include <esd.h>
static int sock;                
static char name_buf[ESD_NAME_MAX]; 
static int latency = 50;        

#endif

boolean
adin_esd_standby(int sfreq, void *dummy)
{
#ifndef HAS_ESD
  jlog("Error: esd not compiled in\n");
  return FALSE;
#else
  esd_format_t format = ESD_BITS16 | ESD_MONO | ESD_STREAM | ESD_RECORD;

  /* generate uniq ID */
  snprintf(name_buf, ESD_NAME_MAX, "julius%d", getpid());

  /* open stream */
  jlog("adin_esd: opening socket, format = 0x%08x at %d Hz id=%s\n", format, sfreq, name_buf);
  sock = esd_record_stream_fallback(format, sfreq, NULL, name_buf);
  if (sock <= 0) {
    jlog("Error: adin_esd: failed to connect to esd\n");
    return FALSE;
  }

  return TRUE;
#endif
}
 
boolean
adin_esd_begin()
{
  return(TRUE);
}

boolean
adin_esd_end()
{
  return TRUE;
}

int
adin_esd_read(SP16 *buf, int sampnum)
{
#ifndef HAS_ESD
  return -2;
#else
  int size, cnt;

  size = sampnum;
  if (size > ESD_BUF_SIZE) size = ESD_BUF_SIZE;
  size *= sizeof(SP16);

  while((cnt = read(sock, buf, size)) <= 0) {
    if (cnt < 0) {
      perror("adin_esd_read: read error\n");
      return ( -2 );
    }
    usleep(latency * 1000);
  }
  cnt /= sizeof(SP16);
  return(cnt);
#endif
}

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