typefind: Expand the search range for HLS detection

HLS files can have arbitrary extra tags in them, and
those can be quite long lines. We need to search
further than 256 bytes sometimes just to get past the
first few lines of the file. Make the limit 4KB,
which matches a typical input block size and should
hopefully cover every crazy input.

https://bugzilla.gnome.org/show_bug.cgi?id=780559
This commit is contained in:
Jan Schmidt 2017-03-27 00:26:53 +11:00
parent 20dd51b92c
commit 0bb82827f7

View file

@ -503,7 +503,8 @@ hls_type_find (GstTypeFind * tf, gpointer unused)
{
DataScanCtx c = { 0, NULL, 0 };
if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 7)))
/* Minimum useful size is #EXTM3U\n + 1 tag + ':' = 30 bytes */
if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 30)))
return;
if (memcmp (c.data, "#EXTM3U", 7))
@ -511,8 +512,8 @@ hls_type_find (GstTypeFind * tf, gpointer unused)
data_scan_ctx_advance (tf, &c, 7);
/* Check only the first 256 bytes */
while (c.offset < 256) {
/* Check only the first 4KB */
while (c.offset < 4096) {
if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 21)))
return;