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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* player.cc
*
* Tue Apr 15 10:34:18 CEST 2014
* Copyright 2014 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 "player.h"
#include <math.h>
#define BUFSZ 1024 * 2
Player::Player(Canvas *c)
{
canvas = c;
playing = false;
pos = 0;
ao_initialize();
ao_sample_format sf;
sf.bits = 16;
sf.rate = 44100;
sf.channels = 1;
sf.byte_format = AO_FMT_NATIVE;
dev = ao_open_live(ao_default_driver_id(), &sf, 0);
gain_scalar = 1000;
peak = 0;
connect(&report_timer, SIGNAL(timeout()), this, SLOT(reportTimeout()));
report_timer.start(50); // Update 25 times per second
}
Player::~Player()
{
ao_close(dev);
ao_shutdown();
}
void Player::run()
{
short s[BUFSZ];
while(true) {
if(playing) {
for(size_t i = 0; i < BUFSZ; i++) {
double sample = 0.0;
if(i + pos < canvas->size) {
sample = canvas->data[pos + i] * gain_scalar;
} else {
playing = false;
}
if(abs(sample) > peak) peak = abs(sample);
s[i] = sample * SHRT_MAX;
}
ao_play(dev, (char*)s, BUFSZ * sizeof(short));
pos += BUFSZ;
} else {
msleep(22);
}
}
}
void Player::setGainScalar(double g)
{
gain_scalar = g;
}
void Player::setGainDB(double gain_db)
{
setGainScalar(pow(10, gain_db/ 20.0));
}
void Player::reportTimeout()
{
emit peakUpdate(peak);
emit peakUpdateDB(20 * log10(peak));
peak = 0.0;
emit positionUpdate(pos);
peak = 0.0;
}
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