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FFmpeg/libavutil/tests/fifo.c
2022-02-07 00:31:23 +01:00

97 lines
2.4 KiB
C

/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include "libavutil/fifo.h"
int main(void)
{
/* create a FIFO buffer */
AVFifo *fifo = av_fifo_alloc2(13, sizeof(int), 0);
int i, j, n, *p;
/* fill data */
for (i = 0; av_fifo_can_write(fifo); i++)
av_fifo_write(fifo, &i, 1);
/* peek_at at FIFO */
n = av_fifo_can_read(fifo);
for (i = 0; i < n; i++) {
av_fifo_peek(fifo, &j, 1, i);
printf("%d: %d\n", i, j);
}
printf("\n");
/* generic peek at FIFO */
n = av_fifo_can_read(fifo);
p = malloc(n * av_fifo_elem_size(fifo));
if (p == NULL) {
fprintf(stderr, "failed to allocate memory.\n");
exit(1);
}
(void) av_fifo_peek(fifo, p, n, 0);
/* read data at p */
for(i = 0; i < n; ++i)
printf("%d: %d\n", i, p[i]);
putchar('\n');
/* read data */
for (i = 0; av_fifo_can_read(fifo); i++) {
av_fifo_read(fifo, &j, 1);
printf("%d ", j);
}
printf("\n");
/* fill data */
for (i = 0; av_fifo_can_write(fifo); i++)
av_fifo_write(fifo, &i, 1);
/* peek_at at FIFO */
n = av_fifo_can_read(fifo);
for (i = 0; i < n; i++) {
av_fifo_peek(fifo, &j, 1, i);
printf("%d: %d\n", i, j);
}
putchar('\n');
/* test fifo_grow */
(void) av_fifo_grow2(fifo, 15);
/* fill data */
n = av_fifo_can_read(fifo);
for (i = n; av_fifo_can_write(fifo); ++i)
av_fifo_write(fifo, &i, 1);
/* peek_at at FIFO */
n = av_fifo_can_read(fifo);
for (i = 0; i < n; i++) {
av_fifo_peek(fifo, &j, 1, i);
printf("%d: %d\n", i, j);
}
av_fifo_freep2(&fifo);
free(p);
return 0;
}