/* * 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 */ AVFifoBuffer *fifo = av_fifo_alloc(13 * sizeof(int)); int i, j, n, *p; /* fill data */ for (i = 0; av_fifo_space(fifo) >= sizeof(int); i++) av_fifo_generic_write(fifo, &i, sizeof(int), NULL); /* peek at FIFO */ n = av_fifo_size(fifo) / sizeof(int); for (i = -n + 1; i < n; i++) { int *v = (int *)av_fifo_peek2(fifo, i * sizeof(int)); printf("%d: %d\n", i, *v); } printf("\n"); /* peek_at at FIFO */ n = av_fifo_size(fifo) / sizeof(int); for (i = 0; i < n; i++) { av_fifo_generic_peek_at(fifo, &j, i * sizeof(int), sizeof(j), NULL); printf("%d: %d\n", i, j); } printf("\n"); /* generic peek at FIFO */ n = av_fifo_size(fifo); p = malloc(n); if (p == NULL) { fprintf(stderr, "failed to allocate memory.\n"); exit(1); } (void) av_fifo_generic_peek(fifo, p, n, NULL); /* read data at p */ n /= sizeof(int); for(i = 0; i < n; ++i) printf("%d: %d\n", i, p[i]); putchar('\n'); /* read data */ for (i = 0; av_fifo_size(fifo) >= sizeof(int); i++) { av_fifo_generic_read(fifo, &j, sizeof(int), NULL); printf("%d ", j); } printf("\n"); /* test *ndx overflow */ av_fifo_reset(fifo); fifo->rndx = fifo->wndx = ~(uint32_t)0 - 5; /* fill data */ for (i = 0; av_fifo_space(fifo) >= sizeof(int); i++) av_fifo_generic_write(fifo, &i, sizeof(int), NULL); /* peek_at at FIFO */ n = av_fifo_size(fifo) / sizeof(int); for (i = 0; i < n; i++) { av_fifo_generic_peek_at(fifo, &j, i * sizeof(int), sizeof(j), NULL); printf("%d: %d\n", i, j); } putchar('\n'); /* test fifo_grow */ (void) av_fifo_grow(fifo, 15 * sizeof(int)); /* fill data */ n = av_fifo_size(fifo) / sizeof(int); for (i = n; av_fifo_space(fifo) >= sizeof(int); ++i) av_fifo_generic_write(fifo, &i, sizeof(int), NULL); /* peek_at at FIFO */ n = av_fifo_size(fifo) / sizeof(int); for (i = 0; i < n; i++) { av_fifo_generic_peek_at(fifo, &j, i * sizeof(int), sizeof(j), NULL); printf("%d: %d\n", i, j); } av_fifo_free(fifo); free(p); return 0; }