ad_base.c
/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* ====================================================================
* Copyright (c) 1999-2001 Carnegie Mellon University. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* This work was supported in part by funding from the Defense Advanced
* Research Projects Agency and the National Science Foundation of the
* United States of America, and the CMU Sphinx Speech Consortium.
*
* THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
* ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
* NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ====================================================================
*
*/
/*
* ad.c -- Wraps a "sphinx-II standard" audio interface around the basic audio
* utilities.
*
* HISTORY
*
* 11-Jun-96 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University.
* Modified to conform to new A/D API.
*
* 12-May-96 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University.
* Dummy template created.
*/
#include <stdio.h>
#include <string.h>
#include <config.h>
#include "prim_type.h"
#include "ad.h"
struct ad_rec_s {
int32 sps;
int32 bps;
};
ad_rec_t *
ad_open_dev(const char *dev, int32 samples_per_sec)
{
fprintf(stderr, "A/D library not implemented\n");
return NULL;
}
ad_rec_t *
ad_open_sps(int32 samples_per_sec)
{
fprintf(stderr, "A/D library not implemented\n");
return NULL;
}
ad_rec_t *
ad_open(void)
{
return ad_open_sps(DEFAULT_SAMPLES_PER_SEC);
}
int32
ad_start_rec(ad_rec_t * r)
{
return -1;
}
int32
ad_stop_rec(ad_rec_t * r)
{
return -1;
}
int32
ad_read(ad_rec_t * r, int16 * buf, int32 max)
{
return -1;
}
int32
ad_close(ad_rec_t * r)
{
return 0;
}
ad.h
generic live audio interface for recording and playback
ad_open_dev
SPHINXBASE_EXPORT ad_rec_t * ad_open_dev(const char *dev, int32 samples_per_sec)
Open a specific audio device for recording.
Definition ad_alsa.c:187
ad_open
SPHINXBASE_EXPORT ad_rec_t * ad_open(void)
Open the default audio device.
Definition ad_alsa.c:228
ad_open_sps
SPHINXBASE_EXPORT ad_rec_t * ad_open_sps(int32 samples_per_sec)
Open the default audio device with a given sampling rate.
Definition ad_alsa.c:222
prim_type.h
Basic type definitions used in Sphinx.
ad_rec_s
Audio recording structure.
Definition ad_alsa.c:90
ad_rec_s::sps
int32 sps
Samples/sec.
Definition ad_alsa.c:93
ad_rec_s::bps
int32 bps
Bytes/sample.
Definition ad_alsa.c:94
ad_rec_t
Audio recording structure.