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registry: avoid some unnecessary strdup/free when reading the binary registry

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Strings in the binary registry are NUL-terminated, so we can just use them
directly if we only need them temporarily, and avoid unnecessary mallocs
and frees.
This commit is contained in:
Tim-Philipp Müller 2010-01-12 20:21:32 +00:00
parent fc2f4ae37a
commit 5e47d24e1b
1 changed files with 21 additions and 12 deletions
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33
gst/gstregistrychunks.c
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@ -84,6 +84,14 @@ _strnlen (const gchar * str, gint maxlen)
inptr += _len + 1; \
}G_STMT_END
#define unpack_string_nocopy(inptr, outptr, endptr, error_label) G_STMT_START{\
gint _len = _strnlen (inptr, (endptr-inptr)); \
if (_len == -1) \
goto error_label; \
outptr = (const gchar *)inptr; \
inptr += _len + 1; \
}G_STMT_END
#define ALIGNMENT (sizeof (void *))
#define alignment(_address) (gsize)_address%ALIGNMENT
#define align(_ptr) _ptr += (( alignment(_ptr) == 0) ? 0 : ALIGNMENT-alignment(_ptr))
@ -496,6 +504,7 @@ gst_registry_chunks_load_feature (GstRegistry * registry, gchar ** in,
{
GstRegistryChunkPluginFeature *pf = NULL;
GstPluginFeature *feature = NULL;
const gchar *const_str;
gchar *type_name = NULL, *str;
gchar *feature_name;
GType type;
@ -584,9 +593,8 @@ gst_registry_chunks_load_feature (GstRegistry * registry, gchar ** in,
if (G_UNLIKELY ((n = ef->ninterfaces))) {
GST_DEBUG ("Reading %d Interfaces at address %p", n, *in);
for (i = 0; i < n; i++) {
unpack_string (*in, str, end, fail);
__gst_element_factory_add_interface (factory, str);
g_free (str);
unpack_string_nocopy (*in, const_str, end, fail);
__gst_element_factory_add_interface (factory, const_str);
}
}
} else if (GST_IS_TYPE_FIND_FACTORY (feature)) {
@ -600,10 +608,13 @@ gst_registry_chunks_load_feature (GstRegistry * registry, gchar ** in,
unpack_element (*in, tff, GstRegistryChunkTypeFindFactory, end, fail);
pf = (GstRegistryChunkPluginFeature *) tff;
/* load caps */
unpack_string (*in, str, end, fail);
factory->caps = (str && *str) ? gst_caps_from_string (str) : NULL;
g_free (str);
/* load typefinder caps */
unpack_string_nocopy (*in, const_str, end, fail);
if (const_str != NULL && *const_str != '\0')
factory->caps = gst_caps_from_string (const_str);
else
factory->caps = NULL;
/* load extensions */
if (tff->nextensions) {
GST_DEBUG ("Reading %d Typefind extensions at address %p",
@ -729,8 +740,8 @@ _priv_gst_registry_chunks_load_plugin (GstRegistry * registry, gchar ** in,
gchar *start = *in;
#endif
GstRegistryChunkPluginElement *pe;
const gchar *cache_str = NULL;
GstPlugin *plugin = NULL;
gchar *cache_str = NULL;
guint i, n;
align (*in);
@ -764,11 +775,9 @@ _priv_gst_registry_chunks_load_plugin (GstRegistry * registry, gchar ** in,
GST_LOG (" desc.origin='%s'", plugin->desc.origin);
/* unpack cache data */
unpack_string (*in, cache_str, end, fail);
if (*cache_str) {
unpack_string_nocopy (*in, cache_str, end, fail);
if (cache_str != NULL && *cache_str != '\0')
plugin->priv->cache_data = gst_structure_from_string (cache_str, NULL);
}
g_free (cache_str);
/* If the license string is 'BLACKLIST', mark this as a blacklisted
* plugin */