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lavf/avio: add avio_vprintf() 

This new function makes it possible to use avio_printf() functionality from
a function taking a variable list of arguments.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Stefano Sabatini 2022-06-12 13:15:26 +02:00 committed by Marton Balint
parent 4d45f5acbd
commit 7cae3d8b76
4 changed files with 24 additions and 5 deletions
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4
doc/APIchanges
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@ -14,6 +14,10 @@ libavutil: 2021-04-27
API changes, most recent first:
2022-06-12 - xxxxxxxxxx - lavf 59.25.100 - avio.h
Add avio_vprintf(), similar to avio_printf() but allow to use it
from within a function taking a variable argument list as input.
2022-05-23 - xxxxxxxxx - lavu 57.25.100 - avutil.h
Deprecate av_fopen_utf8() without replacement.

6
libavformat/avio.h
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@ -519,6 +519,12 @@ int64_t avio_size(AVIOContext *s);
*/
int avio_feof(AVIOContext *s);
/**
* Writes a formatted string to the context taking a va_list.
* @return number of bytes written, < 0 on error.
*/
int avio_vprintf(AVIOContext *s, const char *fmt, va_list ap);
/**
* Writes a formatted string to the context.
* @return number of bytes written, < 0 on error.

17
libavformat/aviobuf.c
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@ -1292,15 +1292,12 @@ int avio_closep(AVIOContext **s)
return ret;
}
int avio_printf(AVIOContext *s, const char *fmt, ...)
int avio_vprintf(AVIOContext *s, const char *fmt, va_list ap)
{
va_list ap;
AVBPrint bp;
av_bprint_init(&bp, 0, INT_MAX);
va_start(ap, fmt);
av_vbprintf(&bp, fmt, ap);
va_end(ap);
if (!av_bprint_is_complete(&bp)) {
av_bprint_finalize(&bp, NULL);
s->error = AVERROR(ENOMEM);
@ -1311,6 +1308,18 @@ int avio_printf(AVIOContext *s, const char *fmt, ...)
return bp.len;
}
int avio_printf(AVIOContext *s, const char *fmt, ...)
{
va_list ap;
int ret;
va_start(ap, fmt);
ret = avio_vprintf(s, fmt, ap);
va_end(ap);
return ret;
}
void avio_print_string_array(AVIOContext *s, const char *strings[])
{
for(; *strings; strings++)

2
libavformat/version.h
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@ -31,7 +31,7 @@
#include "version_major.h"
#define LIBAVFORMAT_VERSION_MINOR 24
#define LIBAVFORMAT_VERSION_MINOR 25
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \