[FFmpeg-devel] [PATCH] asfdec: ensure that the whole tag is read.
Janne Grunau
janne-ffmpeg
Thu Jan 27 10:19:20 CET 2011
On Thu, Jan 27, 2011 at 07:51:59AM +0100, Anton Khirnov wrote:
> ---
> libavformat/asfdec.c | 11 ++++++-----
> 1 files changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/libavformat/asfdec.c b/libavformat/asfdec.c
> index 229f8ba..34869df 100644
> --- a/libavformat/asfdec.c
> +++ b/libavformat/asfdec.c
> @@ -125,13 +125,14 @@ static int get_value(ByteIOContext *pb, int type){
> static void get_tag(AVFormatContext *s, const char *key, int type, int len)
> {
> char *value;
> + int64_t off = url_ftell(s->pb);
>
> if ((unsigned)len >= (UINT_MAX - 1)/2)
> - return;
> + goto finish;
just return here and spare the FFMAX in the seek, no need to free
value
> value = av_malloc(2*len+1);
> if (!value)
> - return;
> + goto finish;
>
> if (type == 0) { // UTF16-LE
> avio_get_str16le(s->pb, len, value, 2*len + 1);
> @@ -139,13 +140,13 @@ static void get_tag(AVFormatContext *s, const char *key, int type, int len)
> uint64_t num = get_value(s->pb, type);
> snprintf(value, len, "%"PRIu64, num);
> } else {
> - url_fskip(s->pb, len);
> - av_freep(&value);
> av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
> - return;
> + goto finish;
> }
> av_metadata_set2(&s->metadata, key, value, 0);
> +finish:
> av_freep(&value);
> + url_fseek(s->pb, off + FFMAX(0, len), SEEK_SET);
see above
Janne
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