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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* audiooutputenginedummy.cc
*
* Sat Apr 30 21:12:02 CEST 2011
* Copyright 2011 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo 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.
*
* DrumGizmo 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 DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "audioout.h"
#define T(x, msg) if(x < 0) { printf("%s failed: %s\n", msg, snd_strerror(x)); fflush(stdout); }
#define BUFSZ 40960
AudioOut::AudioOut(std::string device, unsigned int srate, int channels)
{
handle = NULL;
snd_pcm_uframes_t frames = 940;
int rc;
rc = snd_pcm_open(&handle, device.c_str(), SND_PCM_STREAM_PLAYBACK, 0);
T(rc, "snd_pcm_open");
if(!handle) {
printf("No handle!\n");
// return false;
}
// Allocate a hardware parameters object.
snd_pcm_hw_params_alloca(¶ms);
// if(rc < 0) return false;
// Fill it in with default values.
rc = snd_pcm_hw_params_any(handle, params);
T(rc, "snd_pcm_hw_params_any");
rc = snd_pcm_hw_params_set_access(handle, params,
SND_PCM_ACCESS_RW_INTERLEAVED);
T(rc, "snd_pcm_hw_params_set_access");
rc = snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_FLOAT);
T(rc, "snd_pcm_hw_params_set_format");
rc = snd_pcm_hw_params_set_channels(handle, params, channels);
T(rc, "snd_pcm_hw_params_set_channels");
rc = snd_pcm_hw_params_set_rate_near(handle, params, &srate, 0);
T(rc, "snd_pcm_hw_params_set_rate_near");
rc = snd_pcm_hw_params_set_period_size_near(handle, params, &frames, 0);
T(rc, "snd_pcm_hw_params_set_period_size_near");
rc = snd_pcm_hw_params(handle, params);
T(rc, "snd_pcm_hw_params");
}
AudioOut::~AudioOut()
{
if(handle) snd_pcm_close(handle);
}
void AudioOut::write(sample_t *samples, size_t size)
{
// Write the interleaved buffer to the soundcard
snd_pcm_writei(handle, samples, size);
}
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