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lavf/http: return error on seeking to negative postion 

Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com>
This commit is contained in:
Lukasz Marek 2014-02-28 00:36:06 +01:00
parent f495fbe76a
commit 4ba6a534dc
1 changed files with 7 additions and 4 deletions
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11
libavformat/http.c
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@ -955,16 +955,19 @@ static int64_t http_seek(URLContext *h, int64_t off, int whence)
else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
return -1;
/* we save the old context in case the seek fails */
old_buf_size = s->buf_end - s->buf_ptr;
memcpy(old_buf, s->buf_ptr, old_buf_size);
s->hd = NULL;
if (whence == SEEK_CUR)
off += s->off;
else if (whence == SEEK_END)
off += s->filesize;
if (off < 0)
return AVERROR(EINVAL);
s->off = off;
/* we save the old context in case the seek fails */
old_buf_size = s->buf_end - s->buf_ptr;
memcpy(old_buf, s->buf_ptr, old_buf_size);
s->hd = NULL;
/* if it fails, continue on old connection */
av_dict_copy(&options, s->chained_options, 0);
if (http_open_cnx(h, &options) < 0) {