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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 <stdio.h>
#include "mediaconfig.h"
AudioBackendAlsa::AudioBackendAlsa(const char *device)
{
int err;
aio = aio_init(&err, "default", NULL, device, NULL, SAMPLERATE, 1);
if(aio == NULL || err) {
printf("ai_init: %d (device: %s)\n", err, device);
exit(1);
return;
}
int srate = aio_get_samplerate(aio);
if(err) printf("ai_get_samplerate: %d\n", err);
if(srate != SAMPLERATE) {
printf("Samplerate: %d\n", srate);
}
printf("buffer size: %d\n", aio_get_buffer_size(aio));
}
AudioBackendAlsa::~AudioBackendAlsa()
{
int err = aio_close(aio);
if(err) printf("ai_err: %d\n", err);
}
int AudioBackendAlsa::read(char *pcm, size_t maxsize)
{
if(aio == NULL) {
printf("ai_err: no handle\n");
return 0;
}
int ret = aio_read(aio, pcm, maxsize);
if(ret < 0) printf("ai_read: %d\n", ret);
return ret;
}
int AudioBackendAlsa::write(const char *pcm, size_t size)
{
if(aio == NULL) {
printf("aio_err: no handle\n");
return 0;
}
int ret = aio_write(aio, pcm, size);
if(ret < 0) printf("ai_write: %d\n", ret);
return ret;
}
int AudioBackendAlsa::getBufferSize()
{
int ret = aio_get_buffer_size(aio);
if(ret > 0) return ret;
return AudioBackend::getBufferSize();
}
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