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gst/typefind/gsttypefindfunctions.c: Lower the probability of mp3 typefinding functions if we don't find a valid mp3 ...

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Original commit message from CVS:
* gst/typefind/gsttypefindfunctions.c: (mp3_type_find_at_offset):
Lower the probability of mp3 typefinding functions if we don't find a
valid mp3 header at the start of the file.
Closes #369482
This commit is contained in:
Edward Hervey 2006-11-02 17:26:03 +00:00
parent 38a28fda01
commit 82382e0b0b
2 changed files with 16 additions and 0 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2006-11-02 Edward Hervey <edward@fluendo.com>
* gst/typefind/gsttypefindfunctions.c: (mp3_type_find_at_offset):
Lower the probability of mp3 typefinding functions if we don't find a
valid mp3 header at the start of the file.
Closes #369482
2006-11-02 Wim Taymans <wim@fluendo.com>
* ext/theora/gsttheoradec.h:

9
gst/typefind/gsttypefindfunctions.c
View file

@ -620,6 +620,7 @@ static GstStaticCaps mp3_caps = GST_STATIC_CAPS ("audio/mpeg, "
#define GST_MP3_TYPEFIND_TRY_HEADERS (5)
#define GST_MP3_TYPEFIND_TRY_SYNC (GST_TYPE_FIND_MAXIMUM * 100) /* 10kB */
#define GST_MP3_TYPEFIND_SYNC_SIZE (2048)
#define GST_MP3_WRONG_HEADER (10)
static void
mp3_type_find_at_offset (GstTypeFind * tf, guint64 start_off,
@ -631,6 +632,7 @@ mp3_type_find_at_offset (GstTypeFind * tf, guint64 start_off,
guint64 skipped;
gint last_free_offset = -1;
gint last_free_framelen = -1;
gboolean headerstart = TRUE;
*found_layer = 0;
*found_prob = 0;
@ -685,6 +687,10 @@ mp3_type_find_at_offset (GstTypeFind * tf, guint64 start_off,
last_free_framelen = -1;
}
/* Mark the fact that we didn't find a valid header at the beginning */
if (found == 0)
headerstart = FALSE;
GST_LOG ("%d. header at offset %" G_GUINT64_FORMAT
" (0x%" G_GINT64_MODIFIER "x) was not an mp3 header "
"(possibly-free: %s)", found + 1, start_off + offset,
@ -719,6 +725,9 @@ mp3_type_find_at_offset (GstTypeFind * tf, guint64 start_off,
(GST_MP3_TYPEFIND_TRY_SYNC - skipped) /
GST_MP3_TYPEFIND_TRY_HEADERS / GST_MP3_TYPEFIND_TRY_SYNC;
if (!headerstart
&& ((probability - GST_MP3_WRONG_HEADER) > GST_TYPE_FIND_MINIMUM))
probability -= GST_MP3_WRONG_HEADER;
if (probability < GST_TYPE_FIND_MINIMUM)
probability = GST_TYPE_FIND_MINIMUM;
if (start_off > 0)