ref: 6a2b3b03e3a985937ef609830599572545fce77e
dir: /src/audio/au_pulseaudio.c/
/*************************************************************************/
/* */
/* Language Technologies Institute */
/* Carnegie Mellon University */
/* Copyright (c) 2012 */
/* 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 */
/* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */
/* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */
/* THIS SOFTWARE. */
/* */
/*********************************************************************** */
/* Author: Alan W Black (awb@cs.cmu.edu) */
/* Date: February 2012 */
/*************************************************************************/
/* */
/* Native access to pulseaudio on Linux */
/* (surprisingly hard to find programming documentation about pa) */
/* Sort of got it from here */
/* http://pulseaudio.org/ */
/* */
/*************************************************************************/
#include "cst_string.h"
#include "cst_wave.h"
#include "cst_audio.h"
#include <pulse/simple.h>
cst_audiodev *audio_open_pulseaudio(unsigned int sps, int channels, cst_audiofmt fmt)
{
cst_audiodev *ad;
int err=0;
/* Pulseaudio specific stuff */
pa_sample_spec *ss;
pa_simple *s;
ss = cst_alloc(pa_sample_spec,1);
ss->rate = sps;
ss->channels = channels;
switch (fmt)
{
case CST_AUDIO_LINEAR16:
if (CST_LITTLE_ENDIAN)
ss->format = PA_SAMPLE_S16LE;
else
ss->format = PA_SAMPLE_S16BE;
break;
case CST_AUDIO_LINEAR8:
ss->format = PA_SAMPLE_U8;
break;
case CST_AUDIO_MULAW:
ss->format = PA_SAMPLE_ULAW;
break;
default:
return NULL;
break;
}
s = pa_simple_new(
NULL, /* use default server */
"flite",
PA_STREAM_PLAYBACK,
NULL, /* use default device */
"Speech",
ss,
NULL, /* default channel map */
NULL, /* default buffering attributes */
&err);
if (err < 0)
return NULL;
/* Write hardware parameters to flite audio device data structure */
ad = cst_alloc(cst_audiodev, 1);
ad->real_sps = ad->sps = sps;
ad->real_channels = ad->channels = channels;
ad->real_fmt = ad->fmt = fmt;
ad->platform_data = (void *) s;
return ad;
}
int audio_close_pulseaudio(cst_audiodev *ad)
{
int result;
pa_simple *s;
if (ad == NULL)
return 0;
s = (pa_simple *) ad->platform_data;
pa_simple_drain(s,&result);
pa_simple_free(s);
cst_free(ad);
return result;
}
int audio_write_pulseaudio(cst_audiodev *ad, void *samples, int num_bytes)
{
pa_simple *s;
int err;
s = (pa_simple *)ad->platform_data;
pa_simple_write(s,samples,(size_t)num_bytes,&err);
return num_bytes;
}
int audio_flush_pulseaudio(cst_audiodev *ad)
{
pa_simple *s;
int err;
s = (pa_simple *)ad->platform_data;
pa_simple_drain(s,&err);
return err;
}
int audio_drain_pulseaudio(cst_audiodev *ad)
{
pa_simple *s;
int err;
s = (pa_simple *)ad->platform_data;
pa_simple_drain(s,&err);
return err;
}