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ext/ogg/gstoggdemux.c: Use gst_type_find_helper_for_buffer() to find the type of stream from the first packet.

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Original commit message from CVS:
* ext/ogg/gstoggdemux.c: (gst_ogg_pad_typefind):
Use gst_type_find_helper_for_buffer() to find the type
of stream from the first packet.
* configure.ac:
Bump requirements to core CVS (needed for vorbis
typefinding to work).
This commit is contained in:
Tim-Philipp Müller 2006-05-25 09:32:31 +00:00
parent 2349787986
commit ccafc14742
3 changed files with 27 additions and 77 deletions
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10
ChangeLog
View file

@ -1,3 +1,13 @@
2006-05-25 Tim-Philipp Müller <tim at centricular dot net>
* ext/ogg/gstoggdemux.c: (gst_ogg_pad_typefind):
Use gst_type_find_helper_for_buffer() to find the type
of stream from the first packet.
* configure.ac:
Bump requirements to core CVS (needed for vorbis
typefinding to work).
2006-05-24 Edward Hervey <edward@fluendo.com>
* gst/typefind/gsttypefindfunctions.c: (qt_type_find):

2
configure.ac
View file

@ -50,7 +50,7 @@ dnl AS_LIBTOOL_TAGS
AM_PROG_LIBTOOL
dnl *** required versions of GStreamer stuff ***
GST_REQ=0.10.5.1
GST_REQ=0.10.6.1
dnl *** autotools stuff ****

92
ext/ogg/gstoggdemux.c
View file

@ -27,6 +27,9 @@
#include <string.h>
#include <gst/gst-i18n-plugin.h>
#include <gst/base/gsttypefindhelper.h>
static const GstElementDetails gst_ogg_demux_details =
GST_ELEMENT_DETAILS ("Ogg demuxer",
"Codec/Demuxer",
@ -224,7 +227,6 @@ static const GstQueryType *gst_ogg_pad_query_types (GstPad * pad);
static gboolean gst_ogg_pad_src_query (GstPad * pad, GstQuery * query);
static gboolean gst_ogg_pad_event (GstPad * pad, GstEvent * event);
static GstCaps *gst_ogg_pad_getcaps (GstPad * pad);
static GstCaps *gst_ogg_type_find (ogg_packet * packet);
static GstOggPad *gst_ogg_chain_get_stream (GstOggChain * chain,
glong serialno);
@ -783,6 +785,7 @@ internal_element_pad_added_cb (GstElement * element, GstPad * pad,
static gboolean
gst_ogg_pad_typefind (GstOggPad * pad, ogg_packet * packet)
{
GstBuffer *buf;
GstCaps *caps;
GstElement *element = NULL;
@ -793,7 +796,16 @@ gst_ogg_pad_typefind (GstOggPad * pad, ogg_packet * packet)
if (GST_PAD_CAPS (pad) != NULL)
return TRUE;
caps = gst_ogg_type_find (packet);
/* The ogg spec defines that the first packet of an ogg stream must identify
* the stream. Therefore ogg can use a simplified approach to typefinding
* and only needs to check the first packet */
buf = gst_buffer_new ();
GST_BUFFER_DATA (buf) = packet->packet;
GST_BUFFER_SIZE (buf) = packet->bytes;
GST_BUFFER_OFFSET (buf) = 0;
caps = gst_type_find_helper_for_buffer (GST_OBJECT (pad), buf, NULL);
gst_buffer_unref (buf);
if (caps == NULL) {
GST_WARNING_OBJECT (ogg,
@ -805,6 +817,8 @@ gst_ogg_pad_typefind (GstOggPad * pad, ogg_packet * packet)
* we are in the streaming mode to calculate the first timestamp. */
GList *factories;
GST_LOG_OBJECT (ogg, "found caps: %" GST_PTR_FORMAT, caps);
/* first filter out the interesting element factories */
factories = gst_default_registry_feature_filter (
(GstPluginFeatureFilter) gst_ogg_demux_factory_filter, FALSE, caps);
@ -2898,80 +2912,6 @@ gst_annodex_granule_to_time (gint64 granulepos, gint64 granulerate_n,
return res;
}
/*** typefinding **************************************************************/
/* ogg supports its own typefinding because the ogg spec defines that the first
* packet of an ogg stream must identify the stream. Therefore ogg can use a
* simplified approach at typefinding.
*/
typedef struct
{
ogg_packet *packet;
guint best_probability;
GstCaps *caps;
}
OggTypeFind;
static guint8 *
ogg_find_peek (gpointer data, gint64 offset, guint size)
{
OggTypeFind *find = (OggTypeFind *) data;
/* We don't support negative offset (from stream end); nothing embedded in ogg
* ever needs them */
if (offset >= 0 && offset + size <= find->packet->bytes) {
return ((guint8 *) find->packet->packet) + offset;
} else {
return NULL;
}
}
static void
ogg_find_suggest (gpointer data, guint probability, const GstCaps * caps)
{
OggTypeFind *find = (OggTypeFind *) data;
if (probability > find->best_probability) {
GstCaps *copy = gst_caps_copy (caps);
gst_caps_replace (&find->caps, copy);
gst_caps_unref (copy);
find->best_probability = probability;
}
}
static GstCaps *
gst_ogg_type_find (ogg_packet * packet)
{
GstTypeFind gst_find;
OggTypeFind find;
GList *walk, *type_list = NULL;
walk = type_list = gst_type_find_factory_get_list ();
find.packet = packet;
find.best_probability = 0;
find.caps = NULL;
gst_find.data = &find;
gst_find.peek = ogg_find_peek;
gst_find.suggest = ogg_find_suggest;
gst_find.get_length = NULL;
while (walk) {
GstTypeFindFactory *factory = GST_TYPE_FIND_FACTORY (walk->data);
gst_type_find_factory_call_function (factory, &gst_find);
if (find.best_probability >= GST_TYPE_FIND_MAXIMUM)
break;
walk = g_list_next (walk);
}
gst_plugin_feature_list_free (type_list);
if (find.best_probability > 0)
return find.caps;
return NULL;
}
gboolean
gst_ogg_demux_plugin_init (GstPlugin * plugin)
{