libsent/src/adin/adin_esd.c

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/*
 * Copyright (c) 2004-2005 Shikano Lab., Nara Institute of Science and Technology
 * Copyright (c) 2005-2006 Julius project team, Nagoya Institute of Technology
 * All rights reserved
 */

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

/* sound header */
#include <esd.h>

static int sock;                
static char name_buf[ESD_NAME_MAX]; 
static int latency = 50;        

boolean
adin_mic_standby(int sfreq, void *dummy)
{
  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 */
  j_printf("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) {
    j_printerr("adin_mic_standby: failed to connect to esd\n");
    return FALSE;
  }

  return TRUE;
}
 
boolean
adin_mic_start()
{
  return(TRUE);
}

boolean
adin_mic_stop()
{
  return TRUE;
}

int
adin_mic_read(SP16 *buf, int sampnum)
{
  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_mic_read: read error\n");
      return ( -2 );
    }
    usleep(latency * 1000);
  }
  cnt /= sizeof(SP16);
  return(cnt);
}

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