• Main Page
  • Related Pages
  • Data Structures
  • Files
  • File List
  • Globals

src/libsphinxad/ad_sunos.c

00001 /* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
00002 /* ====================================================================
00003  * Copyright (c) 1999-2001 Carnegie Mellon University.  All rights
00004  * reserved.
00005  *
00006  * Redistribution and use in source and binary forms, with or without
00007  * modification, are permitted provided that the following conditions
00008  * are met:
00009  *
00010  * 1. Redistributions of source code must retain the above copyright
00011  *    notice, this list of conditions and the following disclaimer. 
00012  *
00013  * 2. Redistributions in binary form must reproduce the above copyright
00014  *    notice, this list of conditions and the following disclaimer in
00015  *    the documentation and/or other materials provided with the
00016  *    distribution.
00017  *
00018  * This work was supported in part by funding from the Defense Advanced 
00019  * Research Projects Agency and the National Science Foundation of the 
00020  * United States of America, and the CMU Sphinx Speech Consortium.
00021  *
00022  * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND 
00023  * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
00024  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
00025  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
00026  * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00027  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
00028  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
00029  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
00030  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
00031  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
00032  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00033  *
00034  * ====================================================================
00035  *
00036  */
00037 /*
00038  * ad.c -- Wraps a "sphinx-II standard" audio interface around the basic audio
00039  *              utilities.
00040  *
00041  * **********************************************
00042  * CMU ARPA Speech Project
00043  *
00044  * Copyright (c) 1996 Carnegie Mellon University.
00045  * ALL RIGHTS RESERVED.
00046  * **********************************************
00047  * 
00048  * HISTORY
00049  * 
00050  * 11-Jun-96    M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University.
00051  *              Modified to new A/D API.
00052  * 
00053  * 22-Apr-94    M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University.
00054  *              Adapted to latest ad.h interface.
00055  */
00056 
00057 #include <stdio.h>
00058 #include <stdlib.h>
00059 #include <string.h>
00060 #include <unistd.h>
00061 #include <assert.h>
00062 #include <config.h>
00063 
00064 #include "audio_utils_sunos.h"
00065 #include "prim_type.h"
00066 #include "ad.h"
00067 
00068 #define QUIT(x)         {fprintf x; exit(-1);}
00069 
00070 ad_rec_t *
00071 ad_open_dev(const char *dev, int32 sps)
00072 {
00073     ad_rec_t *r;
00074 
00075     if ((r = (ad_rec_t *) calloc(1, sizeof(ad_rec_t))) == NULL)
00076         return NULL;
00077 
00078     if (dev == NULL)
00079         dev = DEFAULT_DEVICE;
00080     r->audio_fd = audioOpen(dev, (int) sps);
00081     r->recording = 0;
00082 
00083     return r;
00084 }
00085 
00086 ad_rec_t *
00087 ad_open_sps(int32 sps)
00088 {
00089     return ad_open_dev(DEFAULT_DEVICE, sps);
00090 }
00091 
00092 ad_rec_t *
00093 ad_open(void)
00094 {
00095     return ad_open_dev(DEFAULT_DEVICE, DEFAULT_SAMPLES_PER_SEC);
00096 }
00097 
00098 int32
00099 ad_start_rec(ad_rec_t * r)
00100 {
00101     if (r->recording)
00102         return -1;
00103 
00104     audioStartRecord();
00105     r->recording = 1;
00106 
00107     return 0;
00108 }
00109 
00110 
00111 int32
00112 ad_stop_rec(ad_rec_t * r)
00113 {
00114     if (!r->recording)
00115         return -1;
00116 
00117     audioStopRecord();
00118     r->recording = 0;
00119 
00120     return 0;
00121 }
00122 
00123 
00124 int32
00125 ad_read(ad_rec_t * r, int16 * buf, int32 max)
00126 {
00127     int32 len;
00128 
00129     /* Get whatever samples are available, upto max requested size */
00130     len = max * AD_SAMPLE_SIZE;
00131     len = read(r->audio_fd, buf, len);
00132 
00133     if (len > 0) {
00134         /* HACK!!  Assume read returns complete samples, but check the assumption */
00135         if (len & 0x1)
00136             QUIT((stderr,
00137                   "%s(%d): **ERROR**, ad_read() returned odd #bytes\n",
00138                   __FILE__, __LINE__));
00139 
00140         return (len >> 1);
00141     }
00142 
00143     if ((len == 0) && (!r->recording))
00144         return -1;              /* EOF */
00145 
00146     return 0;
00147 }
00148 
00149 
00150 int32
00151 ad_close(ad_rec_t * r)
00152 {
00153     if (r->recording)
00154         ad_stop_rec(r);
00155 
00156     audioClose();
00157     free(r);
00158 
00159     return 0;
00160 }

Generated on Thu Jan 6 2011 for SphinxBase by  doxygen 1.7.1