/*************************************************************************//*                                                                       *//*                  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;}