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mpdparser: Add support for loading external SegmentLists
https://bugzilla.gnome.org/show_bug.cgi?id=752230
This commit is contained in:
Sebastian Dröge
parent
51e8624d56
commit
49931eda69
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@ -161,8 +161,8 @@ static GstRepresentationNode
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static GstSegmentBaseType *gst_mpdparser_get_segment_base (GstPeriodNode *
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Period, GstAdaptationSetNode * AdaptationSet,
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GstRepresentationNode * Representation);
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static GstSegmentListNode *gst_mpdparser_get_segment_list (GstPeriodNode *
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Period, GstAdaptationSetNode * AdaptationSet,
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static GstSegmentListNode *gst_mpdparser_get_segment_list (GstMpdClient *
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client, GstPeriodNode * Period, GstAdaptationSetNode * AdaptationSet,
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GstRepresentationNode * Representation);
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/* Segments */
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@ -212,6 +212,9 @@ static void gst_mpdparser_free_stream_period (GstStreamPeriod * stream_period);
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static void gst_mpdparser_free_media_segment (GstMediaSegment * media_segment);
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static void gst_mpdparser_free_active_stream (GstActiveStream * active_stream);
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static GstUri *combine_urls (GstUri * base, GList * list, gchar ** query,
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guint idx);
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struct GstMpdParserUtcTimingMethod
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{
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const gchar *name;
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@ -2181,21 +2184,152 @@ gst_mpdparser_get_rep_idx_with_max_bandwidth (GList * Representations,
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}
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static GstSegmentListNode *
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gst_mpdparser_get_segment_list (GstPeriodNode * Period,
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gst_mpd_client_fetch_external_segment_list (GstMpdClient * client,
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GstPeriodNode * Period,
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GstAdaptationSetNode * AdaptationSet,
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GstRepresentationNode * Representation,
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GstSegmentListNode * parent, GstSegmentListNode * segment_list,
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gboolean * error)
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{
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GstFragment *download;
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GstBuffer *segment_list_buffer;
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GstMapInfo map;
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GError *err = NULL;
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xmlDocPtr doc;
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GstUri *base_uri, *uri;
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gchar *query = NULL;
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gchar *uri_string;
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GstSegmentListNode *new_segment_list = NULL;
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*error = FALSE;
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/* ISO/IEC 23009-1:2014 5.5.3 4)
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* Remove nodes that resolve to nothing when resolving
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*/
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if (strcmp (segment_list->xlink_href,
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"urn:mpeg:dash:resolve-to-zero:2013") == 0) {
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return NULL;
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}
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if (!client->downloader) {
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*error = TRUE;
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return NULL;
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}
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/* Build absolute URI */
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/* Get base URI at the MPD level */
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base_uri =
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gst_uri_from_string (client->
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mpd_base_uri ? client->mpd_base_uri : client->mpd_uri);
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/* combine a BaseURL at the MPD level with the current base url */
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base_uri = combine_urls (base_uri, client->mpd_node->BaseURLs, &query, 0);
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/* combine a BaseURL at the Period level with the current base url */
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base_uri = combine_urls (base_uri, Period->BaseURLs, &query, 0);
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if (AdaptationSet) {
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/* combine a BaseURL at the AdaptationSet level with the current base url */
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base_uri = combine_urls (base_uri, AdaptationSet->BaseURLs, &query, 0);
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if (Representation) {
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/* combine a BaseURL at the Representation level with the current base url */
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base_uri = combine_urls (base_uri, Representation->BaseURLs, &query, 0);
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}
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}
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uri = gst_uri_from_string_with_base (base_uri, segment_list->xlink_href);
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if (query)
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gst_uri_set_query_string (uri, query);
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g_free (query);
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uri_string = gst_uri_to_string (uri);
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gst_uri_unref (base_uri);
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gst_uri_unref (uri);
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download =
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gst_uri_downloader_fetch_uri (client->downloader,
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uri_string, client->mpd_uri, TRUE, FALSE, TRUE, &err);
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g_free (uri_string);
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if (!download) {
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GST_ERROR ("Failed to download external SegmentList node at '%s': %s",
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segment_list->xlink_href, err->message);
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g_clear_error (&err);
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*error = TRUE;
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return NULL;
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}
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segment_list_buffer = gst_fragment_get_buffer (download);
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g_object_unref (download);
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gst_buffer_map (segment_list_buffer, &map, GST_MAP_READ);
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doc =
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xmlReadMemory ((const gchar *) map.data, map.size, "noname.xml", NULL,
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XML_PARSE_NONET);
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if (doc) {
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xmlNode *root_element = xmlDocGetRootElement (doc);
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if (root_element->type != XML_ELEMENT_NODE ||
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xmlStrcmp (root_element->name, (xmlChar *) "SegmentList") != 0) {
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xmlFreeDoc (doc);
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gst_buffer_unmap (segment_list_buffer, &map);
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gst_buffer_unref (segment_list_buffer);
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*error = TRUE;
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return NULL;
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}
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gst_mpdparser_parse_segment_list_node (&new_segment_list, root_element,
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parent);
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} else {
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GST_ERROR ("Failed to parse adaptation set node XML");
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gst_buffer_unmap (segment_list_buffer, &map);
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gst_buffer_unref (segment_list_buffer);
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*error = TRUE;
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return NULL;
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}
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gst_buffer_unmap (segment_list_buffer, &map);
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gst_buffer_unref (segment_list_buffer);
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return new_segment_list;
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}
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static GstSegmentListNode *
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gst_mpdparser_get_segment_list (GstMpdClient * client, GstPeriodNode * Period,
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GstAdaptationSetNode * AdaptationSet,
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GstRepresentationNode * Representation)
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{
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GstSegmentListNode *SegmentList = NULL;
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GstSegmentListNode **SegmentList;
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GstSegmentListNode *ParentSegmentList = NULL;
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if (Representation && Representation->SegmentList) {
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SegmentList = Representation->SegmentList;
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SegmentList = &Representation->SegmentList;
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ParentSegmentList = AdaptationSet->SegmentList;
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} else if (AdaptationSet && AdaptationSet->SegmentList) {
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SegmentList = AdaptationSet->SegmentList;
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SegmentList = &AdaptationSet->SegmentList;
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ParentSegmentList = Period->SegmentList;
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Representation = NULL;
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} else {
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SegmentList = Period->SegmentList;
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Representation = NULL;
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AdaptationSet = NULL;
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SegmentList = &Period->SegmentList;
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}
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return SegmentList;
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/* Resolve external segment list here. */
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if (*SegmentList && (*SegmentList)->xlink_href) {
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GstSegmentListNode *new_segment_list;
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gboolean error;
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new_segment_list =
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gst_mpd_client_fetch_external_segment_list (client, Period,
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AdaptationSet, Representation, ParentSegmentList, *SegmentList, &error);
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gst_mpdparser_free_segment_list_node (*SegmentList);
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*SegmentList = new_segment_list;
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}
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return *SegmentList;
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}
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/* memory management functions */
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@ -3327,7 +3461,7 @@ gst_mpd_client_setup_representation (GstMpdClient * client,
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/* get the first segment_list of the selected representation */
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if ((stream->cur_segment_list =
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gst_mpdparser_get_segment_list (stream_period->period,
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gst_mpdparser_get_segment_list (client, stream_period->period,
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stream->cur_adapt_set, representation)) == NULL) {
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GST_DEBUG ("No useful SegmentList node for the current Representation");
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/* here we should have a single segment for each representation, whose URL is encoded in the baseURL element */
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