ref: 397265f5791291defa76487c2388e1898e2e433c
dir: /include/cst_audio.h/
/*************************************************************************/
/* */
/* Language Technologies Institute */
/* Carnegie Mellon University */
/* Copyright (c) 2000 */
/* All Rights Reserved. */
/* */
/* Permission is hereby granted, free of charge, to use and distribute */
/* this software and its documentation without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of this work, and to */
/* permit persons to whom this work is furnished to do so, subject to */
/* the following conditions: */
/* 1. The code must retain the above copyright notice, this list of */
/* conditions and the following disclaimer. */
/* 2. Any modifications must be clearly marked as such. */
/* 3. Original authors' names are not deleted. */
/* 4. The authors' names are not used to endorse or promote products */
/* derived from this software without specific prior written */
/* permission. */
/* */
/* CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK */
/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
/* SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE */
/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
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/* THIS SOFTWARE. */
/* */
/*************************************************************************/
/* Author: Alan W Black (awb@cs.cmu.edu) */
/* Date: August 2000 */
/*************************************************************************/
/* */
/* Audio */
/* */
/*************************************************************************/
#ifndef _CST_AUDIO_H__
#define _CST_AUDIO_H__
#include "cst_wave.h"
#include "cst_hrg.h"
#ifdef CST_AUDIO_WIN32
#define CST_AUDIOBUFFSIZE 8092
#else
#define CST_AUDIOBUFFSIZE 128
#endif
#define CST_AUDIO_DEFAULT_PORT 1746
#define CST_AUDIO_DEFAULT_SERVER "localhost"
#define CST_AUDIO_DEFAULT_ENCODING "short"
typedef enum {
CST_AUDIO_LINEAR16 = 0,
CST_AUDIO_LINEAR8,
CST_AUDIO_MULAW
} cst_audiofmt;
/* Returns the number of bytes per sample for a given audio format */
int audio_bps(cst_audiofmt fmt);
typedef struct cst_audiodev_struct {
int sps, real_sps;
int channels, real_channels;
cst_audiofmt fmt, real_fmt;
int byteswap;
cst_rateconv *rateconv;
void *platform_data;
} cst_audiodev;
/* Generic audio functions */
cst_audiodev *audio_open(int sps, int channels, cst_audiofmt fmt);
int audio_close(cst_audiodev *ad);
int audio_write(cst_audiodev *ad, void *buff, int num_bytes);
int audio_flush(cst_audiodev *ad); /* wait for buffers to empty */
int audio_drain(cst_audiodev *ad); /* empty buffers now */
/* Generic high level audio functions */
int play_wave(cst_wave *w);
int play_wave_sync(cst_wave *w, cst_relation *rel,
int (*call_back)(cst_item *));
int play_wave_client(cst_wave *w, const char *servername, int port,
const char *encoding);
int auserver(int port);
/* Play wave to specified device */
int play_wave_device(cst_wave *w, cst_audiodev *ad);
/* Output to a file as if its an audio device */
cst_audiodev *audio_open_file(int sps, int channels, cst_audiofmt fmt,
const char *filename);
int audio_close_file(cst_audiodev *ad);
int audio_write_file(cst_audiodev *ad, void *buff, int num_bytes);
int audio_drain_file(cst_audiodev *ad);
int audio_flush_file(cst_audiodev *ad);
/* For audio streaming */
#define CST_AUDIO_STREAM_STOP -1
#define CST_AUDIO_STREAM_CONT 0
typedef struct cst_audio_streaming_info_struct
{
int min_buffsize;
int (*asc)(const cst_wave *w,int start,int size,
int last, struct cst_audio_streaming_info_struct *asi);
const cst_utterance *utt; /* in case you need more information */
const cst_item *item; /* because you'll probably want this */
/* But this is *not* updated automatically */
void *userdata;
} cst_audio_streaming_info;
cst_audio_streaming_info *new_audio_streaming_info(void);
void delete_audio_streaming_info(cst_audio_streaming_info *asi);
CST_VAL_USER_TYPE_DCLS(audio_streaming_info,cst_audio_streaming_info)
typedef int (*cst_audio_stream_callback)(const cst_wave *w,int start,int size,
int last, cst_audio_streaming_info *asi);
/* An example audio streaming callback function src/audio/au_streaming.c */
int audio_stream_chunk(const cst_wave *w, int start, int size,
int last, cst_audio_streaming_info *asi);
#endif