dashdemux: copy ContentProtection element including xml namespaces
Commit bc09d8cc changed gstmpdparser to put the entire <ContentProtection> element in the "value" field, so that DRMs other than PlayReady could make use of the data inside this element. However, the data in the "value" field does not include any XML namespace declarations that are used within the element. This causes problems for a namespace aware XML parser that wants to make use of this data. This commit modifies the way the XML is converted to a string so that XML namespaces are preserved in the output. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/2487>
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@ -975,11 +975,24 @@ gst_xml_helper_get_node_as_string (xmlNode * a_node, gchar ** content)
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gboolean exists = FALSE;
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const char *txt_encoding;
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xmlOutputBufferPtr out_buf;
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xmlNode *ncopy = NULL;
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txt_encoding = (const char *) a_node->doc->encoding;
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out_buf = xmlAllocOutputBuffer (NULL);
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g_assert (out_buf != NULL);
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xmlNodeDumpOutput (out_buf, a_node->doc, a_node, 0, 0, txt_encoding);
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/* Need to make a copy of XML element so that it includes namespaces
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in the output, so that the resulting string can be parsed by an XML parser
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that is namespace aware.
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Use extended=1 for recursive copy (properties, namespaces and children) */
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ncopy = xmlDocCopyNode (a_node, a_node->doc, 1);
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if (!ncopy) {
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GST_WARNING ("Failed to clone XML node");
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goto done;
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}
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xmlNodeDumpOutput (out_buf, ncopy->doc, ncopy, 0, 0, txt_encoding);
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(void) xmlOutputBufferFlush (out_buf);
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#ifdef LIBXML2_NEW_BUFFER
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if (xmlOutputBufferGetSize (out_buf) > 0) {
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@ -999,6 +1012,8 @@ gst_xml_helper_get_node_as_string (xmlNode * a_node, gchar ** content)
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exists = TRUE;
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}
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#endif // LIBXML2_NEW_BUFFER
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xmlFreeNode (ncopy);
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done:
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(void) xmlOutputBufferClose (out_buf);
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if (exists) {
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@ -51,6 +51,9 @@
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#include <gst/check/gstcheck.h>
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#include <libxml/parser.h>
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#include <libxml/tree.h>
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GST_DEBUG_CATEGORY (gst_dash_demux_debug);
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/*
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@ -1434,7 +1437,7 @@ GST_START_TEST
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"<?xml version=\"1.0\"?>"
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"<MPD xmlns=\"urn:mpeg:dash:schema:mpd:2011\""
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" profiles=\"urn:mpeg:dash:profile:isoff-main:2011\">"
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" customns=\"foo\""
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" xmlns:customns=\"foo\""
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" <Period>"
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" <AdaptationSet>"
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" <ContentProtection schemeIdUri=\"TestSchemeIdUri\">"
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@ -1578,6 +1581,93 @@ GST_START_TEST (dash_mpdparser_contentProtection_no_value_no_encoding)
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GST_END_TEST;
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/*
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* Test parsing Period AdaptationSet RepresentationBase ContentProtection
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* attributes
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*/
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GST_START_TEST
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(dash_mpdparser_period_adaptationSet_representationBase_contentProtection_xml_namespaces)
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{
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const gchar *xml =
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"<?xml version=\"1.0\"?>"
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"<MPD xmlns=\"urn:mpeg:dash:schema:mpd:2011\" minBufferTime=\"PT1.500S\""
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" type=\"static\" mediaPresentationDuration=\"PT0H24M28.000S\""
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" maxSegmentDuration=\"PT0H0M4.000S\""
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" profiles=\"urn:mpeg:dash:profile:isoff-live:2011,http://dashif.org/guidelines/dash264\""
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" xmlns:cenc=\"urn:mpeg:cenc:2013\" xmlns:clearkey=\"http://dashif.org/guidelines/clearKey\">"
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" <Period>" " <AdaptationSet>"
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" <ContentProtection schemeIdUri=\"urn:mpeg:dash:mp4protection:2011\""
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" value=\"cenc\" cenc:default_KID=\"33969335-53A5-4E78-BA99-9054CD1B2871\">"
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" </ContentProtection>"
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" <ContentProtection value=\"ClearKey1.0\""
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" schemeIdUri=\"urn:uuid:e2719d58-a985-b3c9-781a-b030af78d30e\">"
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" <clearkey:Laurl Lic_type=\"EME-1.0\">https://drm.test.example/AcquireLicense</clearkey:Laurl>"
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" </ContentProtection></AdaptationSet></Period></MPD>";
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GstMPDPeriodNode *periodNode;
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GstMPDAdaptationSetNode *adaptationSet;
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GstMPDRepresentationBaseNode *representationBase;
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GstMPDDescriptorTypeNode *contentProtection;
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gboolean ret;
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GstMPDClient *mpdclient = gst_mpd_client_new ();
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xmlDocPtr doc;
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xmlNode *root_element = NULL, *node;
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xmlChar *property = NULL;
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ret = gst_mpd_client_parse (mpdclient, xml, (gint) strlen (xml));
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assert_equals_int (ret, TRUE);
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periodNode = (GstMPDPeriodNode *) mpdclient->mpd_root_node->Periods->data;
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adaptationSet = (GstMPDAdaptationSetNode *) periodNode->AdaptationSets->data;
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representationBase = GST_MPD_REPRESENTATION_BASE_NODE (adaptationSet);
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assert_equals_int (g_list_length (representationBase->ContentProtection), 2);
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contentProtection = (GstMPDDescriptorTypeNode *)
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g_list_nth_data (representationBase->ContentProtection, 0);
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assert_equals_string (contentProtection->schemeIdUri,
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"urn:mpeg:dash:mp4protection:2011");
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contentProtection = (GstMPDDescriptorTypeNode *)
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g_list_nth_data (representationBase->ContentProtection, 1);
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assert_equals_string (contentProtection->schemeIdUri,
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"urn:uuid:e2719d58-a985-b3c9-781a-b030af78d30e");
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/* We can't do a simple string compare of value, because the whitespace
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formatting from xmlDump might differ between versions of libxml */
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LIBXML_TEST_VERSION;
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doc =
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xmlReadMemory (contentProtection->value,
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strlen (contentProtection->value), "ContentProtection.xml", NULL,
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XML_PARSE_NONET);
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fail_if (!doc);
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root_element = xmlDocGetRootElement (doc);
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fail_if (root_element->type != XML_ELEMENT_NODE);
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fail_if (xmlStrcmp (root_element->name,
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(xmlChar *) "ContentProtection") != 0);
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fail_if ((property =
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xmlGetNoNsProp (root_element, (const xmlChar *) "value")) == NULL);
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fail_if (xmlStrcmp (property, (xmlChar *) "ClearKey1.0") != 0);
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xmlFree (property);
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fail_if ((property =
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xmlGetNoNsProp (root_element,
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(const xmlChar *) "schemeIdUri")) == NULL);
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assert_equals_string ((const gchar *) property,
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"urn:uuid:e2719d58-a985-b3c9-781a-b030af78d30e");
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xmlFree (property);
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for (node = root_element->children; node; node = node->next) {
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if (node->type == XML_ELEMENT_NODE)
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break;
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}
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assert_equals_string ((const gchar *) node->name, "Laurl");
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assert_equals_string ((const gchar *) node->children->content,
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"https://drm.test.example/AcquireLicense");
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xmlFreeDoc (doc);
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gst_mpd_client_free (mpdclient);
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}
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GST_END_TEST;
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/*
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* Test parsing Period AdaptationSet Accessibility attributes
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*
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@ -6454,6 +6544,8 @@ dash_suite (void)
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dash_mpdparser_contentProtection_no_value_no_encoding);
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tcase_add_test (tc_simpleMPD,
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dash_mpdparser_period_adaptationSet_representationBase_contentProtection_with_content);
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tcase_add_test (tc_simpleMPD,
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dash_mpdparser_period_adaptationSet_representationBase_contentProtection_xml_namespaces);
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tcase_add_test (tc_simpleMPD,
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dash_mpdparser_period_adaptationSet_accessibility);
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tcase_add_test (tc_simpleMPD, dash_mpdparser_period_adaptationSet_role);
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