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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
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@ -26,6 +26,7 @@
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#include <io.h>
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#endif
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <stdlib.h>
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#include "os_support.h"
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@ -73,8 +74,11 @@ static int file_write(URLContext *h, unsigned char *buf, int size)
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static int64_t file_seek(URLContext *h, int64_t pos, int whence)
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{
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int fd = (intptr_t) h->priv_data;
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if (whence != SEEK_SET && whence != SEEK_CUR && whence != SEEK_END)
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return AVERROR_NOTSUPP;
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if (whence == AVSEEK_SIZE) {
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struct stat st;
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int ret = fstat(fd, &st);
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return ret < 0 ? AVERROR(errno) : st.st_size;
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}
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return lseek(fd, pos, whence);
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}
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