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/*
* Copyright 1994-2022 Olivier Girondel
*
* This file is part of lebiniou.
*
* lebiniou 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.
*
* lebiniou 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 lebiniou. If not, see <http://www.gnu.org/licenses/>.
*/
#include "context.h"
#include "pthread_utils.h"
uint32_t options = BO_NONE;
uint32_t version = 0;
#define FACT 0.40
#define DEVICE "/dev/urandom"
static short *urndbuff;
static int urndfd;
static struct timespec req;
int8_t
create(Context_t *ctx)
{
req.tv_sec = 0;
req.tv_nsec = 100000000;
urndfd = open(DEVICE, O_RDONLY);
if (urndfd == -1) {
xerror("Unable to open `%s'\n", DEVICE);
}
uint32_t insize = Context_get_input_size(ctx);
urndbuff = xcalloc(insize * 2, sizeof(short));
ctx->input = Input_new(insize);
return 1;
}
void
destroy(Context_t *ctx)
{
Input_delete(ctx->input);
close(urndfd);
xfree(urndbuff);
}
void *
jthread(void *args)
{
Context_t *ctx = (Context_t *)args;
while (ctx->running) {
int n;
n = read(urndfd, (void *)urndbuff, ctx->input->size * 2 * sizeof(short));
if (!ctx->input->mute && (n != -1)) {
int m, idx;
if (!xpthread_mutex_lock(&ctx->input->mutex)) {
for (m = 0, idx = 0; (m < n) && (idx < (int)ctx->input->size); idx++) {
ctx->input->data[A_LEFT][idx] = FACT * (float)((float)urndbuff[m++] / (float)-SHRT_MIN);
ctx->input->data[A_RIGHT][idx] = FACT * (float)((float)urndbuff[m++] / (float)-SHRT_MIN);
}
Input_set(ctx->input, A_STEREO);
xpthread_mutex_unlock(&ctx->input->mutex);
}
}
nanosleep(&req, NULL);
}
return NULL;
}
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