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| author | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2010-04-04 14:21:29 +0000 |
|---|---|---|
| committer | Stefano Sabatini <stefano.sabatini-lala@poste.it> | 2010-04-04 14:21:29 +0000 |
| commit | 5b33a553763f5499c6627fb5cff0659e37edf22c (patch) | |
| tree | b43373598089711a8b46b08947f754195085f90f /libavformat/file.c | |
| parent | 685598f58d7faebb2ecf9d97bad8302f51a6e27e (diff) | |
| download | ffmpeg-5b33a553763f5499c6627fb5cff0659e37edf22c.tar.gz | |
Implement support to the AVSEEK_SIZE operation in file_seek().
Avoid the need to use seeking for getting the file size, use fstat
instead, which is significantly faster.
See thread:
Subject: [FFmpeg-devel] [PATCH] Add support to AVSEEK_SIZE to the file protocol seek callback
Date: Fri, 2 Apr 2010 13:13:27 +0200
Originally committed as revision 22799 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavformat/file.c')
| -rw-r--r-- | libavformat/file.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/libavformat/file.c b/libavformat/file.c index 9b60a5f1f8..d42a678c98 100644 --- a/libavformat/file.c +++ b/libavformat/file.c @@ -26,6 +26,7 @@ #include <io.h> #endif #include <unistd.h> +#include <sys/stat.h> #include <sys/time.h> #include <stdlib.h> #include "os_support.h" @@ -73,8 +74,11 @@ static int file_write(URLContext *h, unsigned char *buf, int size) static int64_t file_seek(URLContext *h, int64_t pos, int whence) { int fd = (intptr_t) h->priv_data; - if (whence != SEEK_SET && whence != SEEK_CUR && whence != SEEK_END) - return AVERROR_NOTSUPP; + if (whence == AVSEEK_SIZE) { + struct stat st; + int ret = fstat(fd, &st); + return ret < 0 ? AVERROR(errno) : st.st_size; + } return lseek(fd, pos, whence); } |