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Add speex typefinding function

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Original commit message from CVS:
Add speex typefinding function
This commit is contained in:
Jan Schmidt 2004-03-14 04:01:34 +00:00
parent a3330cc8fd
commit 4885e0e767
2 changed files with 38 additions and 0 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2004-03-14 Jan Schmidt <thaytan@mad.scientist.com>
* gst/typefind/gsttypefindfunctions.c: (speex_type_find),
(plugin_init):
Add a typefind function for speex format
2004-03-13 Ronald Bultje <rbultje@ronald.bitfreak.net>
* gst/asfdemux/gstasfdemux.c: (gst_asf_demux_video_caps),

33
gst/typefind/gsttypefindfunctions.c
View file

@ -1107,6 +1107,37 @@ theora_type_find (GstTypeFind *tf, gpointer private)
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, THEORA_CAPS);
}
/*** audio/x-speex ***********************************************************/
static GstStaticCaps speex_caps = GST_STATIC_CAPS ("audio/x-speex");
#define SPEEX_CAPS (gst_static_caps_get(&speex_caps))
static void
speex_type_find (GstTypeFind *tf, gpointer private)
{
guint8 *data = gst_type_find_peek (tf, 0, 80);
if (data) {
/* 8 byte string "Speex "
24 byte speex version string + int */
if (memcmp (data, "Speex ", 8) != 0) return;
data += 32;
/* 4 byte header size >= 80 */
if (GINT32_FROM_LE (*((gint32 *) data)) < 80) return;
data += 4;
/* 4 byte sample rate <= 48000 */
if (GINT32_FROM_LE (*((gint32 *) data)) > 48000) return;
data += 4;
/* currently there are only 3 speex modes. */
if (GINT32_FROM_LE (*((gint32 *) data)) > 3) return;
data += 12;
gst_type_find_suggest (tf, GST_TYPE_FIND_MAXIMUM, SPEEX_CAPS);
}
}
/*** generic typefind for streams that have some data at a specific position***/
typedef struct {
@ -1301,6 +1332,8 @@ plugin_init (GstPlugin *plugin)
vorbis_type_find, NULL, VORBIS_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "video/x-theora", GST_RANK_PRIMARY,
theora_type_find, NULL, THEORA_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-speex", GST_RANK_PRIMARY,
speex_type_find, NULL, SPEEX_CAPS, NULL);
TYPE_FIND_REGISTER (plugin, "audio/x-m4a", GST_RANK_PRIMARY,
m4a_type_find, m4a_exts, AAC_CAPS, NULL);