On Thu, 9 Mar 2023, 1035567...@qq.com wrote:
From: Wang Yaqiang <wangyaqian...@kuaishou.com>
svg is xml, but <?xml is not required,
it can start with <svg and can have multiple empty lines,
or start with <!--- include some comments,
but must first line if start with <?xml.
Will apply, thanks.
Marton
Signed-off-by: Wang Yaqiang <wangyaqian...@kuaishou.com>
---
libavformat/img2dec.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/libavformat/img2dec.c b/libavformat/img2dec.c
index 5a63d7c81d..3488600400 100644
--- a/libavformat/img2dec.c
+++ b/libavformat/img2dec.c
@@ -964,8 +964,13 @@ static int svg_probe(const AVProbeData *p)
{
const uint8_t *b = p->buf;
const uint8_t *end = p->buf + p->buf_size;
-
- if (memcmp(p->buf, "<?xml", 5))
+ while (b && b < end && av_isspace(*b)) b++;
+ if (b >= end - 5)
+ return 0;
+ if (!memcmp(b, "<svg", 4)) {
+ return AVPROBE_SCORE_EXTENSION + 1;
+ }
+ if (memcmp(p->buf, "<?xml", 5) && memcmp(b, "<!--", 4))
return 0;
while (b < end) {
int inc = ff_subtitles_next_line(b);
--
2.39.2
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