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gst/typefind/gsttypefindfunctions.c: Add typefinder for MXF.

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Original commit message from CVS:
* gst/typefind/gsttypefindfunctions.c: (mxf_type_find),
(plugin_init):
Add typefinder for MXF.
This commit is contained in:
Sebastian Dröge 2008-10-05 08:10:09 +00:00
parent c3dfad8ff8
commit d3edbe7745
2 changed files with 42 additions and 0 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2008-10-05 Sebastian Dröge <sebastian.droege@collabora.co.uk>
* gst/typefind/gsttypefindfunctions.c: (mxf_type_find),
(plugin_init):
Add typefinder for MXF.
2008-10-03 Jan Schmidt <jan.schmidt@sun.com>
* tests/icles/Makefile.am:

36
gst/typefind/gsttypefindfunctions.c
View file

@ -2329,6 +2329,39 @@ matroska_type_find (GstTypeFind * tf, gpointer ununsed)
}
}
/*** application/mxf ***/
static GstStaticCaps mxf_caps = GST_STATIC_CAPS ("application/mxf");
#define MXF_MAX_PROBE_LENGTH (1024 * 64)
#define MXF_CAPS (gst_static_caps_get(&mxf_caps))
/*
* Quoting http://www.digitalpreservation.gov/formats/fdd/fdd000013.shtml:
* "MXF files start with an optional run-in followed by the SMPTE header partition pack key.
* The run-in is less than 64k bytes and the condition for finding the start of the file is
* to identify the first 11 bytes of the partition pack key . . . scan the initial 64 k bytes
* for these 11 bytes" to identify an MXF file. (From SMPTE EG 41, p. 45) The 11 bytes listed
* are from SMPTE 377M, p.20.
*/
static void
mxf_type_find (GstTypeFind * tf, gpointer ununsed)
{
static const guint8 header_partition_pack_key[] =
{ 0x06, 0x0e, 0x2b, 0x34, 0x02, 0x05, 0x01, 0x01, 0x0d, 0x01, 0x02 };
DataScanCtx c = { 0, NULL, 0 };
while (c.offset <= MXF_MAX_PROBE_LENGTH) {
if (G_UNLIKELY (!data_scan_ctx_ensure_data (tf, &c, 11)))
break;
if (memcmp (c.data, header_partition_pack_key, 11) == 0) {
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, MXF_CAPS);
return;
}
data_scan_ctx_advance (tf, &c, 1);
}
}
/*** video/x-dv ***/
static GstStaticCaps dv_caps = GST_STATIC_CAPS ("video/x-dv, "
@ -3016,6 +3049,7 @@ plugin_init (GstPlugin * plugin)
static gchar *mid_exts[] = { "mid", "midi", NULL };
static gchar *imelody_exts[] = { "imy", "ime", "imelody", NULL };
static gchar *pdf_exts[] = { "pdf", NULL };
static gchar *mxf_exts[] = { "mxf", NULL };
GST_DEBUG_CATEGORY_INIT (type_find_debug, "typefindfunctions",
GST_DEBUG_FG_GREEN | GST_DEBUG_BG_RED, "generic type find functions");
@ -3148,6 +3182,8 @@ plugin_init (GstPlugin * plugin)
tiff_exts, TIFF_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "video/x-matroska", GST_RANK_PRIMARY,
matroska_type_find, matroska_exts, MATROSKA_CAPS, NULL, NULL);
TYPE_FIND_REGISTER (plugin, "application/mxf", GST_RANK_PRIMARY,
mxf_type_find, mxf_exts, MXF_CAPS, NULL, NULL);
TYPE_FIND_REGISTER_START_WITH (plugin, "video/x-mve", GST_RANK_SECONDARY,
mve_exts, "Interplay MVE File\032\000\032\000\000\001\063\021", 26,
GST_TYPE_FIND_MAXIMUM);