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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set et sw=2 ts=2: */
/***************************************************************************
* soundplayer.cc
*
* Fri Sep 5 17:31:28 CEST 2014
* Copyright 2014 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of Kaiman.
*
* Kaiman 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.
*
* Kaiman 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 Kaiman; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "soundplayer.h"
#include "audiobackend.h"
#define BUFSZ 128
SoundPlayer::SoundPlayer()
{
start();
pread = 0;
for(int i = 0; i < 10; i++) pwrite[i] = 0;
memset(ringbuffer, 0, sizeof(ringbuffer));
}
SoundPlayer::~SoundPlayer()
{
running = false;
wait();
}
void SoundPlayer::run()
{
running = true;
short s[BUFSZ];
memset(s, 0, sizeof(s));
while(running) {
for(int i = 0; i < BUFSZ; i++) {
s[i] = ringbuffer[pread % RINGBUFFER];
ringbuffer[pread % RINGBUFFER] = 0;
pread++;
}
g_audiobackend->write((const char *)s, sizeof(s));
}
}
void SoundPlayer::playSamples(int peer, const char *pcm, size_t size)
{
if(pwrite[peer] == 0) pwrite[peer] = pread + (1.5 * BUFSZ);
short *p = (short*)pcm;
for(int i = 0; i < size / sizeof(short); i++) {
ringbuffer[pwrite[peer] % RINGBUFFER] += p[i];
pwrite[peer]++;
}
// If pwrite is behind, repeat the last sample.
if((pwrite[peer] - pread) < BUFSZ) {
ringbuffer[pwrite[peer] % RINGBUFFER] =
ringbuffer[(pwrite[peer] - 1) % RINGBUFFER];
pwrite[peer]++;
// printf("repeat\n");
}
// If pwrite is too far ahead skip the last sample.
if((pwrite[peer] - pread) > (2 * BUFSZ)) {
pwrite[peer]--;
// printf("skip\n");
}
// printf("pread: %d, pwrite[%d]: %d\n", pread, peer, pwrite[peer]);
}
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