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gst/typefind/gsttypefindfunctions.c: Akos Maroy (#308663).

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Original commit message from CVS:
* gst/typefind/gsttypefindfunctions.c: (utf8_type_find),
(xml_check_first_element), (xml_type_find), (smil_type_find),
(plugin_init):
Add typefinding for SMIL and for generic XML. Based on patch by
Akos Maroy (#308663).
This commit is contained in:
Tim-Philipp Müller 2005-10-19 09:21:46 +00:00
parent cffa20bf51
commit cdbb4ae9ca
2 changed files with 117 additions and 18 deletions
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8
ChangeLog
View file

@ -1,3 +1,11 @@
2005-10-19 Tim-Philipp Müller <tim at centricular dot net>
* gst/typefind/gsttypefindfunctions.c: (utf8_type_find),
(xml_check_first_element), (xml_type_find), (smil_type_find),
(plugin_init):
Add typefinding for SMIL and for generic XML. Based on patch by
Akos Maroy (#308663).
2005-10-18 Wim Taymans <wim@fluendo.com>
* gst/playback/Makefile.am:

127
gst/typefind/gsttypefindfunctions.c
View file

@ -38,6 +38,9 @@ GST_DEBUG_CATEGORY_STATIC (type_find_debug);
#define GST_CAT_DEFAULT type_find_debug
/*** text/plain ***/
static gboolean xml_check_first_element (GstTypeFind * tf,
const gchar * element, guint elen);
static GstStaticCaps utf8_caps = GST_STATIC_CAPS ("text/plain");
@ -53,6 +56,10 @@ utf8_type_find (GstTypeFind * tf, gpointer unused)
guint step = 10; /* how much we reduce probability in each
* iteration */
/* leave xml to the xml typefinders */
if (xml_check_first_element (tf, "", 0))
return;
while (probability > step) {
data = gst_type_find_peek (tf, 0, size);
if (data) {
@ -133,6 +140,84 @@ uri_type_find (GstTypeFind * tf, gpointer unused)
}
}
/*** application/xml **********************************************************/
#define XML_BUFFER_SIZE 256
#define XML_INC_BUFFER { \
pos++; \
if (pos == XML_BUFFER_SIZE) { \
pos = 0; \
offset += XML_BUFFER_SIZE; \
data = gst_type_find_peek (tf, offset, XML_BUFFER_SIZE); \
if (data == NULL) return FALSE; \
} else { \
data++; \
} \
}
static gboolean
xml_check_first_element (GstTypeFind * tf, const gchar * element, guint elen)
{
guint8 *data = gst_type_find_peek (tf, 0, XML_BUFFER_SIZE);
guint offset = 0;
guint pos = 0;
/* look for the XMLDec,
* see XML spec 2.8, Prolog and Document Type Declaration
* http://www.w3.org/TR/2004/REC-xml-20040204/#sec-prolog-dtd */
if (!data || memcmp (data, "<?xml", 5) != 0)
return FALSE;
pos += 5;
data += 5;
/* look for the first element, it has to be a <smil> element */
while (data) {
while (*data != '<') {
XML_INC_BUFFER;
}
XML_INC_BUFFER;
if (!g_ascii_isalpha (*data)) {
/* if not alphabetic, it's a PI or an element / attribute declaration
* like <?xxx or <!xxx */
XML_INC_BUFFER;
continue;
}
/* the first normal element, check if it's the one asked for */
data = gst_type_find_peek (tf, offset + pos, elen + 1);
return (data && element && strncmp ((char *) data, element, elen) == 0);
}
return FALSE;
}
static GstStaticCaps generic_xml_caps = GST_STATIC_CAPS ("application/xml");
#define GENERIC_XML_CAPS (gst_static_caps_get(&generic_xml_caps))
static void
xml_type_find (GstTypeFind * tf, gpointer unused)
{
if (xml_check_first_element (tf, "", 0)) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MINIMUM, GENERIC_XML_CAPS);
}
}
/*** application/smil *********************************************************/
static GstStaticCaps smil_caps = GST_STATIC_CAPS ("application/smil");
#define SMIL_CAPS (gst_static_caps_get(&smil_caps))
static void
smil_type_find (GstTypeFind * tf, gpointer unused)
{
if (xml_check_first_element (tf, "smil", 4)) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SMIL_CAPS);
}
}
/*** video/x-fli ***/
static GstStaticCaps flx_caps = GST_STATIC_CAPS ("video/x-fli");
@ -1803,6 +1888,8 @@ plugin_init (GstPlugin * plugin)
static gchar *shn_exts[] = { "shn", NULL };
static gchar *ape_exts[] = { "ape", NULL };
static gchar *uri_exts[] = { "ram", NULL };
static gchar *smil_exts[] = { "smil", NULL };
static gchar *xml_exts[] = { "xml", NULL };
static gchar *jpeg_exts[] = { "jpg", "jpe", "jpeg", NULL };
static gchar *gif_exts[] = { "gif", NULL };
static gchar *png_exts[] = { "png", NULL };
@ -1892,26 +1979,30 @@ plugin_init (GstPlugin * plugin)
utf8_exts, UTF8_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "text/uri-list", GST_RANK_MARGINAL, uri_type_find,
uri_exts, URI_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "application/smil", GST_RANK_SECONDARY,
smil_type_find, smil_exts, SMIL_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "application/xml", GST_RANK_MARGINAL,
xml_type_find, xml_exts, GENERIC_XML_CAPS, NULL);
TYPE_FIND_REGISTER_RIFF (plugin, "audio/x-wav", GST_RANK_PRIMARY, wav_exts,
"WAVE");
TYPE_FIND_REGISTER (plugin, "audio/x-aiff", GST_RANK_SECONDARY,
aiff_type_find, aiff_exts, AIFF_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-svx", GST_RANK_SECONDARY,
svx_type_find, svx_exts, SVX_CAPS, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-paris",
GST_RANK_SECONDARY, paris_exts, " paf", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-paris",
GST_RANK_SECONDARY, paris_exts, "fap ", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-nist",
GST_RANK_SECONDARY, nist_exts, "NIST", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-voc",
GST_RANK_SECONDARY, voc_exts, "Creative", 8, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER (plugin, "audio/x-sds", GST_RANK_SECONDARY,
sds_type_find, sds_exts, SDS_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-svx", GST_RANK_SECONDARY, svx_type_find,
svx_exts, SVX_CAPS, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-paris", GST_RANK_SECONDARY,
paris_exts, " paf", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-paris", GST_RANK_SECONDARY,
paris_exts, "fap ", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-nist", GST_RANK_SECONDARY,
nist_exts, "NIST", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-voc", GST_RANK_SECONDARY,
voc_exts, "Creative", 8, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER (plugin, "audio/x-sds", GST_RANK_SECONDARY, sds_type_find,
sds_exts, SDS_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-ircam", GST_RANK_SECONDARY,
ircam_type_find, ircam_exts, IRCAM_CAPS, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-w64",
GST_RANK_SECONDARY, w64_exts, "riff", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER_START_WITH (plugin, "audio/x-w64", GST_RANK_SECONDARY,
w64_exts, "riff", 4, GST_TYPE_FIND_MAXIMUM);
TYPE_FIND_REGISTER (plugin, "audio/x-shorten", GST_RANK_SECONDARY,
shn_type_find, shn_exts, SHN_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "application/x-ape", GST_RANK_SECONDARY,
@ -1969,8 +2060,8 @@ plugin_init (GstPlugin * plugin)
speex_type_find, NULL, SPEEX_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "application/x-ogg-skeleton", GST_RANK_PRIMARY,
oggskel_type_find, NULL, OGG_SKELETON_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "text/x-cmml", GST_RANK_PRIMARY,
cmml_type_find, NULL, CMML_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "text/x-cmml", GST_RANK_PRIMARY, cmml_type_find,
NULL, CMML_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-m4a", GST_RANK_PRIMARY, m4a_type_find,
m4a_exts, M4A_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "application/x-3gp", GST_RANK_PRIMARY,
@ -1984,8 +2075,8 @@ plugin_init (GstPlugin * plugin)
TYPE_FIND_REGISTER (plugin, "audio/x-wavpack", GST_RANK_SECONDARY,
wavpack_type_find, wavpack_exts, WAVPACK_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-wavpack-correction", GST_RANK_SECONDARY,
wavpack_type_find, wavpack_correction_exts,
WAVPACK_CORRECTION_CAPS, NULL);
wavpack_type_find, wavpack_correction_exts, WAVPACK_CORRECTION_CAPS,
NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "application/x-rar",
GST_RANK_SECONDARY, rar_exts, "Rar!", 4, GST_TYPE_FIND_LIKELY);
TYPE_FIND_REGISTER (plugin, "application/x-tar", GST_RANK_SECONDARY,