mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-23 11:19:55 +00:00
3b0fb00990
Signed-off-by: cyberbox <468042667@qq.com> Change-Id: I63cc2a8c9ff6197c67d6b6b47c124882ad942a22
95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
/*
|
|
* Copyright (c) 2012 Nicolas George
|
|
*
|
|
* 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 "libavutil/avassert.h"
|
|
#include "libavutil/bprint.c"
|
|
|
|
#undef printf
|
|
|
|
static void bprint_pascal(AVBPrint *b, unsigned size)
|
|
{
|
|
unsigned i, j;
|
|
unsigned p[42];
|
|
|
|
av_assert0(size < FF_ARRAY_ELEMS(p));
|
|
|
|
p[0] = 1;
|
|
av_bprintf(b, "%8d\n", 1);
|
|
for (i = 1; i <= size; i++) {
|
|
p[i] = 1;
|
|
for (j = i - 1; j > 0; j--)
|
|
p[j] = p[j] + p[j - 1];
|
|
for (j = 0; j <= i; j++)
|
|
av_bprintf(b, "%8d", p[j]);
|
|
av_bprintf(b, "\n");
|
|
}
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
AVBPrint b;
|
|
char buf[256];
|
|
struct tm testtime = { .tm_year = 100, .tm_mon = 11, .tm_mday = 20 };
|
|
|
|
av_bprint_init(&b, 0, AV_BPRINT_SIZE_UNLIMITED);
|
|
bprint_pascal(&b, 5);
|
|
printf("Short text in unlimited buffer: %u/%u\n", (unsigned)strlen(b.str), b.len);
|
|
printf("%s\n", b.str);
|
|
av_bprint_finalize(&b, NULL);
|
|
|
|
av_bprint_init(&b, 0, AV_BPRINT_SIZE_UNLIMITED);
|
|
bprint_pascal(&b, 25);
|
|
printf("Long text in unlimited buffer: %u/%u\n", (unsigned)strlen(b.str), b.len);
|
|
av_bprint_finalize(&b, NULL);
|
|
|
|
av_bprint_init(&b, 0, 2048);
|
|
bprint_pascal(&b, 25);
|
|
printf("Long text in limited buffer: %u/%u\n", (unsigned)strlen(b.str), b.len);
|
|
av_bprint_finalize(&b, NULL);
|
|
|
|
av_bprint_init(&b, 0, AV_BPRINT_SIZE_AUTOMATIC);
|
|
bprint_pascal(&b, 5);
|
|
printf("Short text in automatic buffer: %u/%u\n", (unsigned)strlen(b.str), b.len);
|
|
|
|
av_bprint_init(&b, 0, AV_BPRINT_SIZE_AUTOMATIC);
|
|
bprint_pascal(&b, 25);
|
|
printf("Long text in automatic buffer: %u/%u\n", (unsigned)strlen(b.str)/8*8, b.len);
|
|
/* Note that the size of the automatic buffer is arch-dependent. */
|
|
|
|
av_bprint_init(&b, 0, AV_BPRINT_SIZE_COUNT_ONLY);
|
|
bprint_pascal(&b, 25);
|
|
printf("Long text count only buffer: %u/%u\n", (unsigned)strlen(b.str), b.len);
|
|
|
|
av_bprint_init_for_buffer(&b, buf, sizeof(buf));
|
|
bprint_pascal(&b, 25);
|
|
printf("Long text count only buffer: %u/%u\n", (unsigned)strlen(buf), b.len);
|
|
|
|
av_bprint_init(&b, 0, AV_BPRINT_SIZE_UNLIMITED);
|
|
av_bprint_strftime(&b, "%Y-%m-%d", &testtime);
|
|
printf("strftime full: %u/%u \"%s\"\n", (unsigned)strlen(buf), b.len, b.str);
|
|
av_bprint_finalize(&b, NULL);
|
|
|
|
av_bprint_init(&b, 0, 8);
|
|
av_bprint_strftime(&b, "%Y-%m-%d", &testtime);
|
|
printf("strftime truncated: %u/%u \"%s\"\n", (unsigned)strlen(buf), b.len, b.str);
|
|
|
|
return 0;
|
|
}
|