mirror of
https://github.com/cmusphinx/sphinxtrain.git
synced 2026-06-16 13:14:30 +00:00
David Huggins-Daines
dc157d12e7
Note that most of it is not at all useful. We also had to use an older version than what's in PocketSphinx because SphinxTrain has different needs. Another reorganization will be done soon.
127 lines
3.7 KiB
C
127 lines
3.7 KiB
C
/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
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/* ====================================================================
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* Copyright (c) 1999-2014 Carnegie Mellon University. All rights
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* reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* This work was supported in part by funding from the Defense Advanced
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* Research Projects Agency and the National Science Foundation of the
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* United States of America, and the CMU Sphinx Speech Consortium.
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*
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* THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
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* ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
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* NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ====================================================================
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*
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*/
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/** \file ad.h
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* \brief generic live audio interface for recording and playback
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*/
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#ifndef _AD_H_
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#define _AD_H_
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#include <sphinx_config.h>
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#include <sphinxbase/sphinxbase_export.h>
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#include <sphinxbase/prim_type.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if 0
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/* Fool Emacs. */
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}
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#endif
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#define DEFAULT_SAMPLES_PER_SEC 16000
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/* Return codes */
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#define AD_OK 0
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#define AD_EOF -1
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#define AD_ERR_GEN -1
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#define AD_ERR_NOT_OPEN -2
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#define AD_ERR_WAVE -3
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typedef struct ad_rec_s ad_rec_t;
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/**
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* Open a specific audio device for recording.
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*
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* The device is opened in non-blocking mode and placed in idle state.
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*
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* @return pointer to read-only ad_rec_t structure if successful, NULL
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* otherwise. The return value to be used as the first argument to
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* other recording functions.
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*/
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SPHINXBASE_EXPORT
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ad_rec_t *ad_open_dev (
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const char *dev, /**< Device name (platform-specific) */
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int32 samples_per_sec /**< Samples per second */
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);
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/**
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* Open the default audio device with a given sampling rate.
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*/
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SPHINXBASE_EXPORT
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ad_rec_t *ad_open_sps (
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int32 samples_per_sec /**< Samples per second */
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);
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/**
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* Open the default audio device.
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*/
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SPHINXBASE_EXPORT
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ad_rec_t *ad_open ( void );
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/* Start audio recording. Return value: 0 if successful, <0 otherwise */
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SPHINXBASE_EXPORT
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int32 ad_start_rec (ad_rec_t *);
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/* Stop audio recording. Return value: 0 if successful, <0 otherwise */
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SPHINXBASE_EXPORT
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int32 ad_stop_rec (ad_rec_t *);
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/* Close the recording device. Return value: 0 if successful, <0 otherwise */
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SPHINXBASE_EXPORT
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int32 ad_close (ad_rec_t *);
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/*
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* Read next block of audio samples while recording; read upto max samples into buf.
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* Return value: # samples actually read (could be 0 since non-blocking); -1 if not
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* recording and no more samples remaining to be read from most recent recording.
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*/
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SPHINXBASE_EXPORT
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int32 ad_read (ad_rec_t *, int16 *buf, int32 max);
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#ifdef __cplusplus
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}
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#endif
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#endif
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