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/*
* fische-3.2
* Copyright (C) Marcel Ebmer 2009-2010 <marcel@26elf.at>
*
* fische-3.2 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.
*
* fische-3.2 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "driver.h"
#include <iostream>
#include <cstdlib>
#include <stdint.h>
#include <cmath>
#include <unistd.h>
#include <SDL/SDL.h>
#include "dummyaudio-samples.h"
#include "ringbuffer.h"
using namespace std;
const double pi = acos (-1);
int sample_dummyaudio (void* arg)
{
sample_param_t* p = (sample_param_t*) arg;
RingBuffer* ringbuffer = p->ringbuffer;
bool* run = p->run;
double fps = 173460 / ringbuffer->size();
int ticks_per_frame = 1000 / fps;
unsigned int last_ticks = 0;
void* buf = malloc (ringbuffer->size());
while (*run) {
while (SDL_GetTicks() < last_ticks + ticks_per_frame) {
usleep (1000);
if (SDL_GetTicks() < last_ticks) break;
}
last_ticks = SDL_GetTicks();
if (last_ticks > 1e9) last_ticks = 0; // fix for late SDL initialisation
double phi = 0;
int I = rand() % 0x8000;
int n = rand() % 200;
for (int i = 0; i < ringbuffer->size() / 2; i += 2) {
* ( ( (int16_t*) buf) + i) = I * sin (phi);
* ( ( (int16_t*) buf) + i + 1) = I * cos (phi);
phi += pi / ringbuffer->size() * n;
}
ringbuffer->insert ( (char*) buf, ringbuffer->size());
}
cout << "* stopping sound sampling thread" << endl;
return 0;
}
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