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typefind: Use the DataScanCtx for the m3u8 typefinder

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This commit is contained in:
Sebastian Dröge 2011-03-30 09:12:25 +02:00
parent 7eb1ded8c1
commit 70148cdf97
1 changed files with 16 additions and 26 deletions
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42
gst/typefind/gsttypefindfunctions.c
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@ -269,44 +269,34 @@ uri_type_find (GstTypeFind * tf, gpointer unused)
/*** plaulist/m3u8 ***/
static GstStaticCaps m3u8_caps = GST_STATIC_CAPS ("playlist/m3u8");
#define M3U8_CAPS (gst_static_caps_get(&m3u8_caps))
#define M3U8_BUFFER_SIZE 24
#define M3U8_INC_BUFFER { \
pos++; \
if (pos == M3U8_BUFFER_SIZE) { \
pos = 0; \
offset += M3U8_BUFFER_SIZE; \
data = gst_type_find_peek (tf, offset, M3U8_BUFFER_SIZE); \
if (data == NULL) return; \
} else { \
data++; \
} \
}
static void
m3u8_type_find (GstTypeFind * tf, gpointer unused)
{
guint pos = 0;
guint offset = 0;
guint8 *data = gst_type_find_peek (tf, 0, 7);
DataScanCtx c = { 0, NULL, 0 };
if (memcmp (data, "#EXTM3U", 7))
if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 7)))
return;
M3U8_INC_BUFFER;
while (data) {
if (memcmp (c.data, "#EXTM3U", 7))
return;
data_scan_ctx_advance (tf, &c, 7);
/* Check only the first 256 bytes */
while (c.offset < 256) {
if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 21)))
return;
/* Search for # comment lines */
while (*data != '#') {
M3U8_INC_BUFFER;
}
if (memcmp (data, "#EXT-X-TARGETDURATION", 21) == 0 ||
memcmp (data, "#EXT-X-STREAM-INF", 17) == 0) {
if (c.data[0] == '#' && (memcmp (c.data, "#EXT-X-TARGETDURATION", 21) == 0
|| memcmp (c.data, "#EXT-X-STREAM-INF", 17) == 0)) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, M3U8_CAPS);
return;
}
M3U8_INC_BUFFER;
data_scan_ctx_advance (tf, &c, 1);
}
}