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aggregator: improve parsing in create_new_pad

Browse source 
The previous implementation was a bit primitive, assuming the subclass
had registered a template name starting with sink_ . Instead make
the effort of parsing the actual template name, and use that to generate
the final pad name.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4032>
This commit is contained in:
Mathieu Duponchelle 2022-01-13 00:45:25 +01:00 committed by GStreamer Marge Bot
parent 2e4fd325e7
commit f3e16deaad
2 changed files with 57 additions and 19 deletions
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4
subprojects/gst-plugins-bad/tests/check/elements/mpegtsmux.c
View file

@ -22,9 +22,9 @@
#include <string.h>
#include <gst/video/video.h>
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink_%d",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_PAD_REQUEST,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate video_src_template = GST_STATIC_PAD_TEMPLATE ("src",

72
subprojects/gstreamer/libs/gst/base/gstaggregator.c
View file

@ -2048,6 +2048,8 @@ gst_aggregator_default_create_new_pad (GstAggregator * self,
GstAggregatorPrivate *priv = self->priv;
gint serial = 0;
gchar *name = NULL;
gchar *percent_str;
GType pad_type =
GST_PAD_TEMPLATE_GTYPE (templ) ==
G_TYPE_NONE ? GST_TYPE_AGGREGATOR_PAD : GST_PAD_TEMPLATE_GTYPE (templ);
@ -2058,34 +2060,56 @@ gst_aggregator_default_create_new_pad (GstAggregator * self,
if (templ->presence != GST_PAD_REQUEST)
goto not_request;
GST_OBJECT_LOCK (self);
if (req_name == NULL || strlen (req_name) < 6
|| !g_str_has_prefix (req_name, "sink_")
|| strrchr (req_name, '%') != NULL) {
/* no name given when requesting the pad, use next available int */
serial = ++priv->max_padserial;
} else {
gchar *endptr = NULL;
percent_str = strrchr (templ->name_template, '%');
/* parse serial number from requested padname */
serial = g_ascii_strtoull (&req_name[5], &endptr, 10);
if (endptr != NULL && *endptr == '\0') {
if (serial > priv->max_padserial) {
priv->max_padserial = serial;
if (percent_str == NULL) {
if (req_name)
name = g_strdup (req_name);
else
name = g_strdup (templ->name_template);
} else if (g_strcmp0 (percent_str, "%u") == 0
|| g_strcmp0 (percent_str, "%d") == 0) {
guint percent_index = percent_str - templ->name_template;
gchar *template_str = g_strndup (templ->name_template, percent_index);
GST_OBJECT_LOCK (self);
if (req_name == NULL || g_strcmp0 (templ->name_template, req_name) == 0) {
/* no name given when requesting the pad, use next available int */
serial = ++priv->max_padserial;
} else if (g_str_has_prefix (req_name, template_str)) {
gchar *endptr = NULL;
/* parse serial number from requested padname */
serial = g_ascii_strtoull (&req_name[percent_index], &endptr, 10);
if (endptr != NULL && *endptr == '\0') {
if (serial > priv->max_padserial) {
priv->max_padserial = serial;
}
} else {
g_free (template_str);
GST_OBJECT_UNLOCK (self);
goto invalid_request_name;
}
} else {
serial = ++priv->max_padserial;
g_free (template_str);
GST_OBJECT_UNLOCK (self);
goto invalid_request_name;
}
name = g_strdup_printf ("%s%u", template_str, serial);
g_free (template_str);
GST_OBJECT_UNLOCK (self);
} else {
goto invalid_template_name;
}
name = g_strdup_printf ("sink_%u", serial);
g_assert (g_type_is_a (pad_type, GST_TYPE_AGGREGATOR_PAD));
agg_pad = g_object_new (pad_type,
"name", name, "direction", GST_PAD_SINK, "template", templ, NULL);
g_free (name);
GST_OBJECT_UNLOCK (self);
return agg_pad;
/* errors */
@ -2099,6 +2123,20 @@ not_request:
GST_WARNING_OBJECT (self, "request new pad that is not a REQUEST pad");
return NULL;
}
invalid_template_name:
{
GST_WARNING_OBJECT (self,
"template name %s is invalid, must be in the form name_%%u (%s)",
templ->name_template, percent_str);
return NULL;
}
invalid_request_name:
{
GST_WARNING_OBJECT (self,
"requested name %s is invalid, must be in the form %s", req_name,
templ->name_template);
return NULL;
}
}
static GstPad *