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avformat/file: add fd option for pipe

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Signed-off-by: Zhao Zhili <zhilizhao@tencent.com>
This commit is contained in:
Zhao Zhili 2022-12-15 01:10:07 +08:00
parent 0d7c452d84
commit 49b8f043ca
3 changed files with 12 additions and 5 deletions
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4
doc/protocols.texi
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@ -687,7 +687,7 @@ The accepted syntax is:
pipe:[@var{number}]
@end example
@var{number} is the number corresponding to the file descriptor of the
If @option{fd} isn't specified, @var{number} is the number corresponding to the file descriptor of the
pipe (e.g. 0 for stdin, 1 for stdout, 2 for stderr). If @var{number}
is not specified, by default the stdout file descriptor will be used
for writing, stdin for reading.
@ -714,6 +714,8 @@ Set I/O operation maximum block size, in bytes. Default value is
@code{INT_MAX}, which results in not limiting the requested block size.
Setting this value reasonably low improves user termination request reaction
time, which is valuable if data transmission is slow.
@item fd
Set file descriptor.
@end table
Note that some formats (typically MOV), require the output protocol to

11
libavformat/file.c
View File

@ -92,6 +92,7 @@ static const AVOption file_options[] = {
static const AVOption pipe_options[] = {
{ "blocksize", "set I/O operation maximum block size", offsetof(FileContext, blocksize), AV_OPT_TYPE_INT, { .i64 = INT_MAX }, 1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
{ "fd", "set file descriptor", offsetof(FileContext, fd), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
{ NULL }
};
@ -381,6 +382,8 @@ static int pipe_open(URLContext *h, const char *filename, int flags)
FileContext *c = h->priv_data;
int fd;
char *final;
if (c->fd < 0) {
av_strstart(filename, "pipe:", &filename);
fd = strtol(filename, &final, 10);
@ -391,10 +394,12 @@ static int pipe_open(URLContext *h, const char *filename, int flags)
fd = 0;
}
}
#if HAVE_SETMODE
setmode(fd, O_BINARY);
#endif
c->fd = fd;
}
#if HAVE_SETMODE
setmode(c->fd, O_BINARY);
#endif
h->is_streamed = 1;
return 0;
}

2
libavformat/version.h
View File

@ -32,7 +32,7 @@
#include "version_major.h"
#define LIBAVFORMAT_VERSION_MINOR 34
#define LIBAVFORMAT_VERSION_MICRO 102
#define LIBAVFORMAT_VERSION_MICRO 103
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \