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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* audiobackend-alsa.cc
*
* Wed Sep 24 07:47:43 CEST 2014
* Copyright 2014 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of SimpleRTP.
*
* SimpleRTP is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* SimpleRTP is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with SimpleRTP; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "audiobackend-alsa.h"
#include <memory.h>
#include "mediaconfig.h"
AudioBackendAlsa::AudioBackendAlsa(const char *device)
{
//
// LibAO:
//
ao_initialize();
ao_sample_format sf;
memset(&sf, 0, sizeof(sf));
sf.bits = 16;
sf.rate = SAMPLERATE;
sf.channels = 1;
sf.byte_format = AO_FMT_NATIVE;
dev = ao_open_live(ao_default_driver_id(), &sf, 0);
//
// LibAudioIn:
//
int err;
ai = ai_init(&err, device, "", SAMPLERATE, 1);
if(ai == NULL || err) {
printf("ai_init: %d (device: %s)\n", err, device);
exit(1);
return;
}
int srate = ai_get_samplerate(&err, ai);
if(err) printf("ai_get_samplerate: %d\n", err);
if(srate != SAMPLERATE) {
printf("Samplerate: %d\n", srate);
}
}
AudioBackendAlsa::~AudioBackendAlsa()
{
//
// LibAO:
//
ao_close(dev);
ao_shutdown();
//
// LibAudioIn:
//
if(ai == NULL) {
printf("ai_err: no handle\n");
return;
}
int err;
ai_close(&err, ai);
if(err) printf("ai_err: %d\n", err);
}
int AudioBackendAlsa::read(char *pcm, size_t maxsize)
{
//
// LibAudioIn:
//
if(ai == NULL) {
printf("ai_err: no handle\n");
return 0;
}
int err;
int ret = ai_read(&err, ai, pcm, maxsize);
if(err) printf("ai_read: %d\n", err);
return ret;
}
int AudioBackendAlsa::write(const char *pcm, size_t size)
{
//
// LibAO:
//
ao_play(dev, (char *)pcm, size);
return 0;
}
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