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