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gstreamer/subprojects/gst-plugins-good/ext/adaptivedemux2/dash/gstmpdparser.c

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/*
* DASH MPD parsing library
*
* gstmpdparser.c
*
* Copyright (C) 2012 STMicroelectronics
*
* Authors:
* Gianluca Gennari <gennarone@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library (COPYING); if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <string.h>
#include <gst/pbutils/pbutils.h>
#include "gstmpdparser.h"
#include "gstdash_debug.h"
#define GST_CAT_DEFAULT gst_dash_demux2_debug
/* XML node parsing */
static void gst_mpdparser_parse_baseURL_node (GList ** list, xmlNode * a_node);
static void gst_mpdparser_parse_descriptor_type (GList ** list,
xmlNode * a_node);
static void gst_mpdparser_parse_content_component_node (GList ** list,
xmlNode * a_node);
static void gst_mpdparser_parse_location_node (GList ** list, xmlNode * a_node);
static void gst_mpdparser_parse_subrepresentation_node (GList ** list,
xmlNode * a_node);
static void gst_mpdparser_parse_segment_url_node (GList ** list,
xmlNode * a_node);
static void gst_mpdparser_parse_url_type_node (GstMPDURLTypeNode ** pointer,
xmlNode * a_node);
static void gst_mpdparser_parse_seg_base_type_ext (GstMPDSegmentBaseNode **
pointer, xmlNode * a_node, GstMPDSegmentBaseNode * parent);
static void gst_mpdparser_parse_s_node (GQueue * queue, xmlNode * a_node);
static void gst_mpdparser_parse_segment_timeline_node (GstMPDSegmentTimelineNode
** pointer, xmlNode * a_node);
static gboolean
gst_mpdparser_parse_mult_seg_base_node (GstMPDMultSegmentBaseNode *
pointer, xmlNode * a_node, GstMPDMultSegmentBaseNode * parent);
static gboolean gst_mpdparser_parse_segment_list_node (GstMPDSegmentListNode **
pointer, xmlNode * a_node, GstMPDSegmentListNode * parent);
static void
gst_mpdparser_parse_representation_base (GstMPDRepresentationBaseNode *
pointer, xmlNode * a_node);
static gboolean gst_mpdparser_parse_representation_node (GList ** list,
xmlNode * a_node, GstMPDAdaptationSetNode * parent,
GstMPDPeriodNode * period_node);
static gboolean gst_mpdparser_parse_adaptation_set_node (GList ** list,
xmlNode * a_node, GstMPDPeriodNode * parent);
static void gst_mpdparser_parse_subset_node (GList ** list, xmlNode * a_node);
static gboolean
gst_mpdparser_parse_segment_template_node (GstMPDSegmentTemplateNode ** pointer,
xmlNode * a_node, GstMPDSegmentTemplateNode * parent);
static gboolean gst_mpdparser_parse_period_node (GList ** list,
xmlNode * a_node);
static void gst_mpdparser_parse_program_info_node (GList ** list,
xmlNode * a_node);
static void gst_mpdparser_parse_metrics_range_node (GList ** list,
xmlNode * a_node);
static void gst_mpdparser_parse_metrics_node (GList ** list, xmlNode * a_node);
static gboolean gst_mpdparser_parse_root_node (GstMPDRootNode ** pointer,
xmlNode * a_node);
static void gst_mpdparser_parse_utctiming_node (GList ** list,
xmlNode * a_node);
/*
Duration Data Type
The duration data type is used to specify a time interval.
The time interval is specified in the following form "-PnYnMnDTnHnMnS" where:
* - indicates the negative sign (optional)
* P indicates the period (required)
* nY indicates the number of years
* nM indicates the number of months
* nD indicates the number of days
* T indicates the start of a time section (required if you are going to specify hours, minutes, or seconds)
* nH indicates the number of hours
* nM indicates the number of minutes
* nS indicates the number of seconds
*/
static void
gst_mpdparser_parse_baseURL_node (GList ** list, xmlNode * a_node)
{
GstMPDBaseURLNode *new_base_url;
new_base_url = gst_mpd_baseurl_node_new ();
*list = g_list_append (*list, new_base_url);
GST_LOG ("content of BaseURL node:");
gst_xml_helper_get_node_content (a_node, &new_base_url->baseURL);
GST_LOG ("attributes of BaseURL node:");
gst_xml_helper_get_prop_string (a_node, "serviceLocation",
&new_base_url->serviceLocation);
gst_xml_helper_get_prop_string (a_node, "byteRange",
&new_base_url->byteRange);
}
static void
gst_mpdparser_parse_descriptor_type (GList ** list, xmlNode * a_node)
{
GstMPDDescriptorTypeNode *new_descriptor;
new_descriptor =
gst_mpd_descriptor_type_node_new ((const gchar *) a_node->name);
*list = g_list_append (*list, new_descriptor);
GST_LOG ("attributes of %s node:", a_node->name);
gst_xml_helper_get_prop_string_stripped (a_node, "schemeIdUri",
&new_descriptor->schemeIdUri);
if (!gst_xml_helper_get_prop_string (a_node, "value", &new_descriptor->value)) {
/* if no value attribute, use XML string representation of the node */
gst_xml_helper_get_node_as_string (a_node, &new_descriptor->value);
}
}
static void
gst_mpdparser_parse_content_component_node (GList ** list, xmlNode * a_node)
{
xmlNode *cur_node;
GstMPDContentComponentNode *new_content_component;
new_content_component = gst_mpd_content_component_node_new ();
*list = g_list_append (*list, new_content_component);
GST_LOG ("attributes of ContentComponent node:");
gst_xml_helper_get_prop_unsigned_integer (a_node, "id", 0,
&new_content_component->id);
gst_xml_helper_get_prop_string (a_node, "lang", &new_content_component->lang);
gst_xml_helper_get_prop_string (a_node, "contentType",
&new_content_component->contentType);
gst_xml_helper_get_prop_ratio (a_node, "par", &new_content_component->par);
/* explore children nodes */
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "Accessibility") == 0) {
gst_mpdparser_parse_descriptor_type
(&new_content_component->Accessibility, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Role") == 0) {
gst_mpdparser_parse_descriptor_type (&new_content_component->Role,
cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Rating") == 0) {
gst_mpdparser_parse_descriptor_type
(&new_content_component->Rating, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Viewpoint") == 0) {
gst_mpdparser_parse_descriptor_type
(&new_content_component->Viewpoint, cur_node);
}
}
}
}
static void
gst_mpdparser_parse_location_node (GList ** list, xmlNode * a_node)
{
gchar *location = NULL;
GstMPDLocationNode *locationNode;
GST_LOG ("content of Location node:");
if (gst_xml_helper_get_node_content (a_node, &location)) {
locationNode = gst_mpd_location_node_new ();
locationNode->location = location;
*list = g_list_append (*list, locationNode);
}
}
static void
gst_mpdparser_parse_subrepresentation_node (GList ** list, xmlNode * a_node)
{
GstMPDSubRepresentationNode *new_subrep;
new_subrep = gst_mpd_sub_representation_node_new ();
*list = g_list_append (*list, new_subrep);
GST_LOG ("attributes of SubRepresentation node:");
gst_xml_helper_get_prop_unsigned_integer (a_node, "level", 0,
&new_subrep->level);
gst_xml_helper_get_prop_uint_vector_type (a_node, "dependencyLevel",
&new_subrep->dependencyLevel, &new_subrep->dependencyLevel_size);
gst_xml_helper_get_prop_unsigned_integer (a_node, "bandwidth", 0,
&new_subrep->bandwidth);
gst_xml_helper_get_prop_string_vector_type (a_node,
"contentComponent", &new_subrep->contentComponent);
/* RepresentationBase extension */
gst_mpdparser_parse_representation_base (GST_MPD_REPRESENTATION_BASE_NODE
(new_subrep), a_node);
}
static void
gst_mpdparser_parse_segment_url_node (GList ** list, xmlNode * a_node)
{
GstMPDSegmentURLNode *new_segment_url;
new_segment_url = gst_mpd_segment_url_node_new ();
*list = g_list_append (*list, new_segment_url);
GST_LOG ("attributes of SegmentURL node:");
gst_xml_helper_get_prop_string (a_node, "media", &new_segment_url->media);
gst_xml_helper_get_prop_range (a_node, "mediaRange",
&new_segment_url->mediaRange);
gst_xml_helper_get_prop_string (a_node, "index", &new_segment_url->index);
gst_xml_helper_get_prop_range (a_node, "indexRange",
&new_segment_url->indexRange);
}
static void
gst_mpdparser_parse_url_type_node (GstMPDURLTypeNode ** pointer,
xmlNode * a_node)
{
GstMPDURLTypeNode *new_url_type;
gst_mpd_url_type_node_free (*pointer);
*pointer = new_url_type =
gst_mpd_url_type_node_new ((const gchar *) a_node->name);
GST_LOG ("attributes of URLType node:");
gst_xml_helper_get_prop_string (a_node, "sourceURL",
&new_url_type->sourceURL);
gst_xml_helper_get_prop_range (a_node, "range", &new_url_type->range);
}
static void
gst_mpdparser_parse_seg_base_type_ext (GstMPDSegmentBaseNode ** pointer,
xmlNode * a_node, GstMPDSegmentBaseNode * parent)
{
xmlNode *cur_node;
GstMPDSegmentBaseNode *seg_base_type;
guint intval;
guint64 int64val;
gboolean boolval;
GstXMLRange *rangeval;
gst_mpd_segment_base_node_free (*pointer);
*pointer = seg_base_type = gst_mpd_segment_base_node_new ();
/* Initialize values that have defaults */
seg_base_type->indexRangeExact = FALSE;
seg_base_type->timescale = 1;
/* Inherit attribute values from parent */
if (parent) {
seg_base_type->timescale = parent->timescale;
seg_base_type->presentationTimeOffset = parent->presentationTimeOffset;
seg_base_type->indexRange = gst_xml_helper_clone_range (parent->indexRange);
seg_base_type->indexRangeExact = parent->indexRangeExact;
seg_base_type->Initialization =
gst_mpd_url_type_node_clone (parent->Initialization);
seg_base_type->RepresentationIndex =
gst_mpd_url_type_node_clone (parent->RepresentationIndex);
}
/* We must retrieve each value first to see if it exists. If it does not
* exist, we do not want to overwrite an inherited value */
GST_LOG ("attributes of SegmentBaseType extension:");
if (gst_xml_helper_get_prop_unsigned_integer (a_node, "timescale", 1,
&intval)) {
seg_base_type->timescale = intval;
}
if (gst_xml_helper_get_prop_unsigned_integer_64 (a_node,
"presentationTimeOffset", 0, &int64val)) {
seg_base_type->presentationTimeOffset = int64val;
}
if (gst_xml_helper_get_prop_range (a_node, "indexRange", &rangeval)) {
if (seg_base_type->indexRange) {
g_free (seg_base_type->indexRange);
}
seg_base_type->indexRange = rangeval;
}
if (gst_xml_helper_get_prop_boolean (a_node, "indexRangeExact",
FALSE, &boolval)) {
seg_base_type->indexRangeExact = boolval;
}
/* explore children nodes */
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "Initialization") == 0 ||
xmlStrcmp (cur_node->name, (xmlChar *) "Initialisation") == 0) {
/* parse will free the previous pointer to create a new one */
gst_mpdparser_parse_url_type_node (&seg_base_type->Initialization,
cur_node);
} else if (xmlStrcmp (cur_node->name,
(xmlChar *) "RepresentationIndex") == 0) {
/* parse will free the previous pointer to create a new one */
gst_mpdparser_parse_url_type_node (&seg_base_type->RepresentationIndex,
cur_node);
}
}
}
}
static void
gst_mpdparser_parse_s_node (GQueue * queue, xmlNode * a_node)
{
GstMPDSNode *new_s_node;
new_s_node = gst_mpd_s_node_new ();
g_queue_push_tail (queue, new_s_node);
GST_LOG ("attributes of S node:");
gst_xml_helper_get_prop_unsigned_integer_64 (a_node, "t", 0, &new_s_node->t);
gst_xml_helper_get_prop_unsigned_integer_64 (a_node, "d", 0, &new_s_node->d);
gst_xml_helper_get_prop_signed_integer (a_node, "r", 0, &new_s_node->r);
}
static void
gst_mpdparser_parse_segment_timeline_node (GstMPDSegmentTimelineNode ** pointer,
xmlNode * a_node)
{
xmlNode *cur_node;
GstMPDSegmentTimelineNode *new_seg_timeline;
gst_mpd_segment_timeline_node_free (*pointer);
*pointer = new_seg_timeline = gst_mpd_segment_timeline_node_new ();
if (new_seg_timeline == NULL) {
GST_WARNING ("Allocation of SegmentTimeline node failed!");
return;
}
/* explore children nodes */
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "S") == 0) {
gst_mpdparser_parse_s_node (&new_seg_timeline->S, cur_node);
}
}
}
}
static gboolean
gst_mpdparser_parse_mult_seg_base_node (GstMPDMultSegmentBaseNode *
mult_seg_base_node, xmlNode * a_node, GstMPDMultSegmentBaseNode * parent)
{
xmlNode *cur_node;
guint intval;
gboolean has_timeline = FALSE, has_duration = FALSE;
mult_seg_base_node->duration = 0;
mult_seg_base_node->startNumber = 1;
/* Inherit attribute values from parent */
if (parent) {
mult_seg_base_node->duration = parent->duration;
mult_seg_base_node->startNumber = parent->startNumber;
mult_seg_base_node->SegmentTimeline =
gst_mpd_segment_timeline_node_clone (parent->SegmentTimeline);
mult_seg_base_node->BitstreamSwitching =
gst_mpd_url_type_node_clone (parent->BitstreamSwitching);
}
GST_LOG ("attributes of MultipleSegmentBaseType extension:");
if (gst_xml_helper_get_prop_unsigned_integer (a_node, "duration", 0, &intval)) {
mult_seg_base_node->duration = intval;
}
/* duration might be specified from parent */
if (mult_seg_base_node->duration)
has_duration = TRUE;
if (gst_xml_helper_get_prop_unsigned_integer (a_node, "startNumber", 1,
&intval)) {
mult_seg_base_node->startNumber = intval;
}
GST_LOG ("extension of MultipleSegmentBaseType extension:");
gst_mpdparser_parse_seg_base_type_ext (&mult_seg_base_node->SegmentBase,
a_node, (parent ? parent->SegmentBase : NULL));
/* explore children nodes */
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "SegmentTimeline") == 0) {
/* parse frees the segmenttimeline if any */
gst_mpdparser_parse_segment_timeline_node
(&mult_seg_base_node->SegmentTimeline, cur_node);
} else if (xmlStrcmp (cur_node->name,
(xmlChar *) "BitstreamSwitching") == 0) {
/* parse frees the old url before setting the new one */
gst_mpdparser_parse_url_type_node
(&mult_seg_base_node->BitstreamSwitching, cur_node);
}
}
}
has_timeline = mult_seg_base_node->SegmentTimeline != NULL;
/* Checking duration and timeline only at Representation's child level */
if (xmlStrcmp (a_node->parent->name, (xmlChar *) "Representation") == 0
&& !has_duration && !has_timeline) {
GST_ERROR ("segment has neither duration nor timeline");
}
return TRUE;
}
static gboolean
gst_mpdparser_parse_segment_list_node (GstMPDSegmentListNode ** pointer,
xmlNode * a_node, GstMPDSegmentListNode * parent)
{
xmlNode *cur_node;
GstMPDSegmentListNode *new_segment_list;
gchar *actuate;
gboolean segment_urls_inherited_from_parent = FALSE;
gst_mpd_segment_list_node_free (*pointer);
new_segment_list = gst_mpd_segment_list_node_new ();
/* Inherit attribute values from parent */
if (parent) {
GList *list;
GstMPDSegmentURLNode *seg_url;
for (list = g_list_first (parent->SegmentURL); list;
list = g_list_next (list)) {
seg_url = (GstMPDSegmentURLNode *) list->data;
new_segment_list->SegmentURL =
g_list_append (new_segment_list->SegmentURL,
gst_mpd_segment_url_node_clone (seg_url));
segment_urls_inherited_from_parent = TRUE;
}
}
new_segment_list->actuate = GST_MPD_XLINK_ACTUATE_ON_REQUEST;
if (gst_xml_helper_get_ns_prop_string (a_node,
"http://www.w3.org/1999/xlink", "href", &new_segment_list->xlink_href)
&& gst_xml_helper_get_ns_prop_string (a_node,
"http://www.w3.org/1999/xlink", "actuate", &actuate)) {
if (strcmp (actuate, GST_MPD_XLINK_ACTUATE_ON_LOAD_STR) == 0)
new_segment_list->actuate = GST_MPD_XLINK_ACTUATE_ON_LOAD;
xmlFree (actuate);
}
GST_LOG ("extension of SegmentList node:");
if (!gst_mpdparser_parse_mult_seg_base_node
(GST_MPD_MULT_SEGMENT_BASE_NODE (new_segment_list), a_node,
(parent ? GST_MPD_MULT_SEGMENT_BASE_NODE (parent) : NULL)))
goto error;
/* explore children nodes */
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "SegmentURL") == 0) {
if (segment_urls_inherited_from_parent) {
/*
* SegmentBase, SegmentTemplate and SegmentList shall inherit
* attributes and elements from the same element on a higher level.
* If the same attribute or element is present on both levels,
* the one on the lower level shall take precedence over the one
* on the higher level.
*/
/* Clear the list of inherited segment URLs */
g_list_free_full (new_segment_list->SegmentURL,
(GDestroyNotify) gst_mpd_segment_url_node_free);
new_segment_list->SegmentURL = NULL;
/* mark the fact that we cleared the list, so that it is not tried again */
segment_urls_inherited_from_parent = FALSE;
}
gst_mpdparser_parse_segment_url_node (&new_segment_list->SegmentURL,
cur_node);
}
}
}
*pointer = new_segment_list;
return TRUE;
error:
gst_mpd_segment_list_node_free (new_segment_list);
return FALSE;
}
static void
gst_mpdparser_parse_content_protection_node (GList ** list, xmlNode * a_node)
{
gchar *value = NULL;
if (gst_xml_helper_get_prop_string (a_node, "value", &value)) {
if (!g_strcmp0 (value, "MSPR 2.0")) {
xmlNode *cur_node;
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "pro") == 0) {
GstMPDDescriptorTypeNode *new_descriptor;
new_descriptor = gst_mpd_descriptor_type_node_new ((const gchar *)
cur_node->name);
*list = g_list_append (*list, new_descriptor);
gst_xml_helper_get_prop_string_stripped (a_node, "schemeIdUri",
&new_descriptor->schemeIdUri);
gst_xml_helper_get_node_content (cur_node, &new_descriptor->value);
goto beach;
}
}
}
} else {
gst_mpdparser_parse_descriptor_type (list, a_node);
}
} else {
gst_mpdparser_parse_descriptor_type (list, a_node);
}
beach:
if (value)
g_free (value);
}
static void
gst_mpdparser_parse_representation_base (GstMPDRepresentationBaseNode *
representation_base, xmlNode * a_node)
{
xmlNode *cur_node;
GST_LOG ("attributes of RepresentationBaseType extension:");
gst_xml_helper_get_prop_string (a_node, "profiles",
&representation_base->profiles);
gst_xml_helper_get_prop_unsigned_integer (a_node, "width", 0,
&representation_base->width);
gst_xml_helper_get_prop_unsigned_integer (a_node, "height", 0,
&representation_base->height);
gst_xml_helper_get_prop_ratio (a_node, "sar", &representation_base->sar);
gst_xml_helper_get_prop_framerate (a_node, "frameRate",
&representation_base->frameRate);
gst_xml_helper_get_prop_framerate (a_node, "minFrameRate",
&representation_base->minFrameRate);
gst_xml_helper_get_prop_framerate (a_node, "maxFrameRate",
&representation_base->maxFrameRate);
gst_xml_helper_get_prop_string (a_node, "audioSamplingRate",
&representation_base->audioSamplingRate);
gst_xml_helper_get_prop_string (a_node, "mimeType",
&representation_base->mimeType);
gst_xml_helper_get_prop_string (a_node, "segmentProfiles",
&representation_base->segmentProfiles);
gst_xml_helper_get_prop_string (a_node, "codecs",
&representation_base->codecs);
if (representation_base->codecs) {
GST_DEBUG ("Getting caps ");
representation_base->caps =
gst_codec_utils_caps_from_mime_codec (representation_base->codecs);
} else {
representation_base->caps =
gst_mpd_helper_mimetype_to_codec_caps (representation_base->mimeType);
GST_DEBUG ("Getting caps from mime type gave %" GST_PTR_FORMAT,
representation_base->caps);
}
gst_xml_helper_get_prop_double (a_node, "maximumSAPPeriod",
&representation_base->maximumSAPPeriod);
gst_mpd_helper_get_SAP_type (a_node, "startWithSAP",
&representation_base->startWithSAP);
gst_xml_helper_get_prop_double (a_node, "maxPlayoutRate",
&representation_base->maxPlayoutRate);
gst_xml_helper_get_prop_boolean (a_node, "codingDependency",
FALSE, &representation_base->codingDependency);
gst_xml_helper_get_prop_string (a_node, "scanType",
&representation_base->scanType);
/* explore children nodes */
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "FramePacking") == 0) {
gst_mpdparser_parse_descriptor_type
(&representation_base->FramePacking, cur_node);
} else if (xmlStrcmp (cur_node->name,
(xmlChar *) "AudioChannelConfiguration") == 0) {
gst_mpdparser_parse_descriptor_type
(&representation_base->AudioChannelConfiguration, cur_node);
} else if (xmlStrcmp (cur_node->name,
(xmlChar *) "ContentProtection") == 0) {
gst_mpdparser_parse_content_protection_node
(&representation_base->ContentProtection, cur_node);
}
}
}
}
static gboolean
gst_mpdparser_parse_representation_node (GList ** list, xmlNode * a_node,
GstMPDAdaptationSetNode * parent, GstMPDPeriodNode * period_node)
{
xmlNode *cur_node;
GstMPDRepresentationNode *new_representation;
new_representation = gst_mpd_representation_node_new ();
GST_LOG ("attributes of Representation node:");
if (!gst_xml_helper_get_prop_string (a_node, "id", &new_representation->id)) {
GST_ERROR ("Cannot parse Representation id, invalid manifest");
goto error;
}
if (!gst_xml_helper_get_prop_unsigned_integer (a_node, "bandwidth", 0,
&new_representation->bandwidth)) {
GST_ERROR ("Cannot parse Representation bandwidth, invalid manifest");
goto error;
}
gst_xml_helper_get_prop_unsigned_integer (a_node, "qualityRanking", 0,
&new_representation->qualityRanking);
gst_xml_helper_get_prop_string_vector_type (a_node, "dependencyId",
&new_representation->dependencyId);
gst_xml_helper_get_prop_string_vector_type (a_node,
"mediaStreamStructureId", &new_representation->mediaStreamStructureId);
/* RepresentationBase extension */
gst_mpdparser_parse_representation_base
(GST_MPD_REPRESENTATION_BASE_NODE (new_representation), a_node);
/* explore children nodes */
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "SegmentBase") == 0) {
gst_mpdparser_parse_seg_base_type_ext (&new_representation->SegmentBase,
cur_node, parent->SegmentBase ?
parent->SegmentBase : period_node->SegmentBase);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "SegmentTemplate") == 0) {
if (!gst_mpdparser_parse_segment_template_node
(&new_representation->SegmentTemplate, cur_node,
parent->SegmentTemplate ?
parent->SegmentTemplate : period_node->SegmentTemplate))
goto error;
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "SegmentList") == 0) {
if (!gst_mpdparser_parse_segment_list_node
(&new_representation->SegmentList, cur_node,
parent->SegmentList ? parent->SegmentList : period_node->
SegmentList))
goto error;
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "BaseURL") == 0) {
gst_mpdparser_parse_baseURL_node (&new_representation->BaseURLs,
cur_node);
} else if (xmlStrcmp (cur_node->name,
(xmlChar *) "SubRepresentation") == 0) {
gst_mpdparser_parse_subrepresentation_node
(&new_representation->SubRepresentations, cur_node);
}
}
}
/* some sanity checking */
*list = g_list_append (*list, new_representation);
return TRUE;
error:
gst_mpd_representation_node_free (new_representation);
return FALSE;
}
static gboolean
gst_mpdparser_parse_adaptation_set_node (GList ** list, xmlNode * a_node,
GstMPDPeriodNode * parent)
{
xmlNode *cur_node;
GstMPDAdaptationSetNode *new_adap_set;
gchar *actuate;
new_adap_set = gst_mpd_adaptation_set_node_new ();
GST_LOG ("attributes of AdaptationSet node:");
new_adap_set->actuate = GST_MPD_XLINK_ACTUATE_ON_REQUEST;
if (gst_xml_helper_get_ns_prop_string (a_node,
"http://www.w3.org/1999/xlink", "href", &new_adap_set->xlink_href)
&& gst_xml_helper_get_ns_prop_string (a_node,
"http://www.w3.org/1999/xlink", "actuate", &actuate)) {
if (strcmp (actuate, "onLoad") == 0)
new_adap_set->actuate = GST_MPD_XLINK_ACTUATE_ON_LOAD;
xmlFree (actuate);
}
gst_xml_helper_get_prop_unsigned_integer (a_node, "id", 0, &new_adap_set->id);
gst_xml_helper_get_prop_unsigned_integer (a_node, "group", 0,
&new_adap_set->group);
gst_xml_helper_get_prop_string (a_node, "lang", &new_adap_set->lang);
gst_xml_helper_get_prop_string (a_node, "contentType",
&new_adap_set->contentType);
gst_xml_helper_get_prop_ratio (a_node, "par", &new_adap_set->par);
gst_xml_helper_get_prop_unsigned_integer (a_node, "minBandwidth", 0,
&new_adap_set->minBandwidth);
gst_xml_helper_get_prop_unsigned_integer (a_node, "maxBandwidth", 0,
&new_adap_set->maxBandwidth);
gst_xml_helper_get_prop_unsigned_integer (a_node, "minWidth", 0,
&new_adap_set->minWidth);
gst_xml_helper_get_prop_unsigned_integer (a_node, "maxWidth", 0,
&new_adap_set->maxWidth);
gst_xml_helper_get_prop_unsigned_integer (a_node, "minHeight", 0,
&new_adap_set->minHeight);
gst_xml_helper_get_prop_unsigned_integer (a_node, "maxHeight", 0,
&new_adap_set->maxHeight);
gst_xml_helper_get_prop_cond_uint (a_node, "segmentAlignment",
&new_adap_set->segmentAlignment);
gst_xml_helper_get_prop_boolean (a_node, "bitstreamSwitching",
parent->bitstreamSwitching, &new_adap_set->bitstreamSwitching);
if (parent->bitstreamSwitching && !new_adap_set->bitstreamSwitching) {
/* according to the standard, if the Period's bitstreamSwitching attribute
* is true, the AdaptationSet should not have the bitstreamSwitching
* attribute set to false.
* We should return a parsing error, but we are generous and ignore the
* standard violation.
*/
new_adap_set->bitstreamSwitching = parent->bitstreamSwitching;
}
gst_xml_helper_get_prop_cond_uint (a_node, "subsegmentAlignment",
&new_adap_set->subsegmentAlignment);
gst_mpd_helper_get_SAP_type (a_node, "subsegmentStartsWithSAP",
&new_adap_set->subsegmentStartsWithSAP);
/* RepresentationBase extension */
gst_mpdparser_parse_representation_base
(GST_MPD_REPRESENTATION_BASE_NODE (new_adap_set), a_node);
/* explore children nodes */
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "Accessibility") == 0) {
gst_mpdparser_parse_descriptor_type (&new_adap_set->Accessibility,
cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Role") == 0) {
gst_mpdparser_parse_descriptor_type (&new_adap_set->Role, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Rating") == 0) {
gst_mpdparser_parse_descriptor_type (&new_adap_set->Rating, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Viewpoint") == 0) {
gst_mpdparser_parse_descriptor_type (&new_adap_set->Viewpoint,
cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "BaseURL") == 0) {
gst_mpdparser_parse_baseURL_node (&new_adap_set->BaseURLs, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "SegmentBase") == 0) {
gst_mpdparser_parse_seg_base_type_ext (&new_adap_set->SegmentBase,
cur_node, parent->SegmentBase);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "SegmentList") == 0) {
if (!gst_mpdparser_parse_segment_list_node (&new_adap_set->SegmentList,
cur_node, parent->SegmentList))
goto error;
} else if (xmlStrcmp (cur_node->name,
(xmlChar *) "ContentComponent") == 0) {
gst_mpdparser_parse_content_component_node
(&new_adap_set->ContentComponents, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "SegmentTemplate") == 0) {
if (!gst_mpdparser_parse_segment_template_node
(&new_adap_set->SegmentTemplate, cur_node, parent->SegmentTemplate))
goto error;
}
}
}
/* We must parse Representation after everything else in the AdaptationSet
* has been parsed because certain Representation child elements can inherit
* attributes specified by the same element in the AdaptationSet
*/
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "Representation") == 0) {
if (!gst_mpdparser_parse_representation_node
(&new_adap_set->Representations, cur_node, new_adap_set, parent))
goto error;
}
}
}
*list = g_list_append (*list, new_adap_set);
return TRUE;
error:
gst_mpd_adaptation_set_node_free (new_adap_set);
return FALSE;
}
static void
gst_mpdparser_parse_subset_node (GList ** list, xmlNode * a_node)
{
GstMPDSubsetNode *new_subset;
new_subset = gst_mpd_subset_node_new ();
*list = g_list_append (*list, new_subset);
GST_LOG ("attributes of Subset node:");
gst_xml_helper_get_prop_uint_vector_type (a_node, "contains",
&new_subset->contains, &new_subset->contains_size);
}
static gboolean
gst_mpdparser_parse_segment_template_node (GstMPDSegmentTemplateNode ** pointer,
xmlNode * a_node, GstMPDSegmentTemplateNode * parent)
{
GstMPDSegmentTemplateNode *new_segment_template;
gchar *strval;
gst_mpd_segment_template_node_free (*pointer);
new_segment_template = gst_mpd_segment_template_node_new ();
GST_LOG ("extension of SegmentTemplate node:");
if (!gst_mpdparser_parse_mult_seg_base_node
(GST_MPD_MULT_SEGMENT_BASE_NODE (new_segment_template), a_node,
(parent ? GST_MPD_MULT_SEGMENT_BASE_NODE (parent) : NULL)))
goto error;
/* Inherit attribute values from parent when the value isn't found */
GST_LOG ("attributes of SegmentTemplate node:");
if (gst_xml_helper_get_prop_string (a_node, "media", &strval)) {
new_segment_template->media = strval;
} else if (parent) {
new_segment_template->media = xmlMemStrdup (parent->media);
}
if (gst_xml_helper_get_prop_string (a_node, "index", &strval)) {
new_segment_template->index = strval;
} else if (parent) {
new_segment_template->index = xmlMemStrdup (parent->index);
}
if (gst_xml_helper_get_prop_string (a_node, "initialization", &strval)) {
new_segment_template->initialization = strval;
} else if (parent) {
new_segment_template->initialization =
xmlMemStrdup (parent->initialization);
}
if (gst_xml_helper_get_prop_string (a_node, "bitstreamSwitching", &strval)) {
new_segment_template->bitstreamSwitching = strval;
} else if (parent) {
new_segment_template->bitstreamSwitching =
xmlMemStrdup (parent->bitstreamSwitching);
}
*pointer = new_segment_template;
return TRUE;
error:
gst_mpd_segment_template_node_free (new_segment_template);
return FALSE;
}
static gboolean
gst_mpdparser_parse_period_node (GList ** list, xmlNode * a_node)
{
xmlNode *cur_node;
GstMPDPeriodNode *new_period;
gchar *actuate;
new_period = gst_mpd_period_node_new ();
GST_LOG ("attributes of Period node:");
new_period->actuate = GST_MPD_XLINK_ACTUATE_ON_REQUEST;
if (gst_xml_helper_get_ns_prop_string (a_node,
"http://www.w3.org/1999/xlink", "href", &new_period->xlink_href)
&& gst_xml_helper_get_ns_prop_string (a_node,
"http://www.w3.org/1999/xlink", "actuate", &actuate)) {
if (strcmp (actuate, "onLoad") == 0)
new_period->actuate = GST_MPD_XLINK_ACTUATE_ON_LOAD;
xmlFree (actuate);
}
gst_xml_helper_get_prop_string (a_node, "id", &new_period->id);
gst_xml_helper_get_prop_duration (a_node, "start", GST_MPD_DURATION_NONE,
&new_period->start);
gst_xml_helper_get_prop_duration (a_node, "duration",
GST_MPD_DURATION_NONE, &new_period->duration);
gst_xml_helper_get_prop_boolean (a_node, "bitstreamSwitching", FALSE,
&new_period->bitstreamSwitching);
/* explore children nodes */
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "SegmentBase") == 0) {
gst_mpdparser_parse_seg_base_type_ext (&new_period->SegmentBase,
cur_node, NULL);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "SegmentList") == 0) {
if (!gst_mpdparser_parse_segment_list_node (&new_period->SegmentList,
cur_node, NULL))
goto error;
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "SegmentTemplate") == 0) {
if (!gst_mpdparser_parse_segment_template_node
(&new_period->SegmentTemplate, cur_node, NULL))
goto error;
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Subset") == 0) {
gst_mpdparser_parse_subset_node (&new_period->Subsets, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "BaseURL") == 0) {
gst_mpdparser_parse_baseURL_node (&new_period->BaseURLs, cur_node);
}
}
}
/* We must parse AdaptationSet after everything else in the Period has been
* parsed because certain AdaptationSet child elements can inherit attributes
* specified by the same element in the Period
*/
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "AdaptationSet") == 0) {
if (!gst_mpdparser_parse_adaptation_set_node
(&new_period->AdaptationSets, cur_node, new_period))
goto error;
}
}
}
*list = g_list_append (*list, new_period);
return TRUE;
error:
gst_mpd_period_node_free (new_period);
return FALSE;
}
static void
gst_mpdparser_parse_program_info_node (GList ** list, xmlNode * a_node)
{
xmlNode *cur_node;
GstMPDProgramInformationNode *new_prog_info;
new_prog_info = gst_mpd_program_information_node_new ();
*list = g_list_append (*list, new_prog_info);
GST_LOG ("attributes of ProgramInformation node:");
gst_xml_helper_get_prop_string (a_node, "lang", &new_prog_info->lang);
gst_xml_helper_get_prop_string (a_node, "moreInformationURL",
&new_prog_info->moreInformationURL);
/* explore children nodes */
GST_LOG ("children of ProgramInformation node:");
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "Title") == 0) {
gst_xml_helper_get_node_content (cur_node, &new_prog_info->Title);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Source") == 0) {
gst_xml_helper_get_node_content (cur_node, &new_prog_info->Source);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Copyright") == 0) {
gst_xml_helper_get_node_content (cur_node, &new_prog_info->Copyright);
}
}
}
}
static void
gst_mpdparser_parse_metrics_range_node (GList ** list, xmlNode * a_node)
{
GstMPDMetricsRangeNode *new_metrics_range;
new_metrics_range = gst_mpd_metrics_range_node_new ();
*list = g_list_append (*list, new_metrics_range);
GST_LOG ("attributes of Metrics Range node:");
gst_xml_helper_get_prop_duration (a_node, "starttime",
GST_MPD_DURATION_NONE, &new_metrics_range->starttime);
gst_xml_helper_get_prop_duration (a_node, "duration",
GST_MPD_DURATION_NONE, &new_metrics_range->duration);
}
static void
gst_mpdparser_parse_metrics_node (GList ** list, xmlNode * a_node)
{
xmlNode *cur_node;
GstMPDMetricsNode *new_metrics;
new_metrics = gst_mpd_metrics_node_new ();
*list = g_list_append (*list, new_metrics);
GST_LOG ("attributes of Metrics node:");
gst_xml_helper_get_prop_string (a_node, "metrics", &new_metrics->metrics);
/* explore children nodes */
GST_LOG ("children of Metrics node:");
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "Range") == 0) {
gst_mpdparser_parse_metrics_range_node (&new_metrics->MetricsRanges,
cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Reporting") == 0) {
/* No reporting scheme is specified in this part of ISO/IEC 23009.
* It is expected that external specifications may define formats
* and delivery for the reporting data. */
GST_LOG (" - Reporting node found (unknown structure)");
}
}
}
}
/* The UTCTiming element is defined in
* ISO/IEC 23009-1:2014/PDAM 1 "Information technology — Dynamic adaptive streaming over HTTP (DASH) — Part 1: Media presentation description and segment formats / Amendment 1: High Profile and Availability Time Synchronization"
*/
static void
gst_mpdparser_parse_utctiming_node (GList ** list, xmlNode * a_node)
{
GstMPDUTCTimingNode *new_timing;
gchar *method = NULL;
gchar *value = NULL;
new_timing = gst_mpd_utctiming_node_new ();
GST_LOG ("attributes of UTCTiming node:");
if (gst_xml_helper_get_prop_string (a_node, "schemeIdUri", &method)) {
new_timing->method = gst_mpd_utctiming_get_method (method);
xmlFree (method);
}
if (gst_xml_helper_get_prop_string (a_node, "value", &value)) {
int max_tokens = 0;
if (GST_MPD_UTCTIMING_TYPE_DIRECT == new_timing->method) {
/* The GST_MPD_UTCTIMING_TYPE_DIRECT method is a special case
* that is not a space separated list.
*/
max_tokens = 1;
}
new_timing->urls = g_strsplit (value, " ", max_tokens);
xmlFree (value);
}
/* append to list only if both method and urls were set */
if (new_timing->method != 0 && new_timing->urls != NULL &&
g_strv_length (new_timing->urls) != 0) {
*list = g_list_append (*list, new_timing);
} else {
gst_mpd_utctiming_node_free (new_timing);
}
}
static gboolean
gst_mpdparser_parse_root_node (GstMPDRootNode ** pointer, xmlNode * a_node)
{
xmlNode *cur_node;
GstMPDRootNode *new_mpd_root;
gst_mpd_root_node_free (*pointer);
*pointer = NULL;
new_mpd_root = gst_mpd_root_node_new ();
GST_LOG ("namespaces of root MPD node:");
new_mpd_root->default_namespace =
gst_xml_helper_get_node_namespace (a_node, NULL);
new_mpd_root->namespace_xsi =
gst_xml_helper_get_node_namespace (a_node, "xsi");
new_mpd_root->namespace_ext =
gst_xml_helper_get_node_namespace (a_node, "ext");
GST_LOG ("attributes of root MPD node:");
gst_xml_helper_get_prop_string (a_node, "schemaLocation",
&new_mpd_root->schemaLocation);
gst_xml_helper_get_prop_string (a_node, "id", &new_mpd_root->id);
gst_xml_helper_get_prop_string (a_node, "profiles", &new_mpd_root->profiles);
gst_mpd_helper_get_mpd_type (a_node, "type", &new_mpd_root->type);
gst_xml_helper_get_prop_dateTime (a_node, "availabilityStartTime",
&new_mpd_root->availabilityStartTime);
gst_xml_helper_get_prop_dateTime (a_node, "availabilityEndTime",
&new_mpd_root->availabilityEndTime);
gst_xml_helper_get_prop_duration (a_node, "mediaPresentationDuration",
GST_MPD_DURATION_NONE, &new_mpd_root->mediaPresentationDuration);
gst_xml_helper_get_prop_duration (a_node, "minimumUpdatePeriod",
GST_MPD_DURATION_NONE, &new_mpd_root->minimumUpdatePeriod);
gst_xml_helper_get_prop_duration (a_node, "minBufferTime",
GST_MPD_DURATION_NONE, &new_mpd_root->minBufferTime);
gst_xml_helper_get_prop_duration (a_node, "timeShiftBufferDepth",
GST_MPD_DURATION_NONE, &new_mpd_root->timeShiftBufferDepth);
gst_xml_helper_get_prop_duration (a_node, "suggestedPresentationDelay",
GST_MPD_DURATION_NONE, &new_mpd_root->suggestedPresentationDelay);
gst_xml_helper_get_prop_duration (a_node, "maxSegmentDuration",
GST_MPD_DURATION_NONE, &new_mpd_root->maxSegmentDuration);
gst_xml_helper_get_prop_duration (a_node, "maxSubsegmentDuration",
GST_MPD_DURATION_NONE, &new_mpd_root->maxSubsegmentDuration);
/* explore children Period nodes */
for (cur_node = a_node->children; cur_node; cur_node = cur_node->next) {
if (cur_node->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (cur_node->name, (xmlChar *) "Period") == 0) {
if (!gst_mpdparser_parse_period_node (&new_mpd_root->Periods, cur_node))
goto error;
} else if (xmlStrcmp (cur_node->name,
(xmlChar *) "ProgramInformation") == 0) {
gst_mpdparser_parse_program_info_node (&new_mpd_root->ProgramInfos,
cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "BaseURL") == 0) {
gst_mpdparser_parse_baseURL_node (&new_mpd_root->BaseURLs, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Location") == 0) {
gst_mpdparser_parse_location_node (&new_mpd_root->Locations, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Metrics") == 0) {
gst_mpdparser_parse_metrics_node (&new_mpd_root->Metrics, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "UTCTiming") == 0) {
gst_mpdparser_parse_utctiming_node (&new_mpd_root->UTCTimings,
cur_node);
}
}
}
*pointer = new_mpd_root;
return TRUE;
error:
gst_mpd_root_node_free (new_mpd_root);
return FALSE;
}
/* internal memory management functions */
/* ISO/IEC 23009-1:2004 5.3.9.4.4 */
static gboolean
validate_format (const gchar * format)
{
const gchar *p = format;
/* Check if it starts with % */
if (!p || p[0] != '%')
return FALSE;
p++;
/* the spec mandates a format like %0[width]d */
/* Following the %, we must have a 0 */
if (p[0] != '0')
return FALSE;
/* Following the % must be a number starting with 0
*/
while (g_ascii_isdigit (*p))
p++;
/* After any 0 and alphanumeric values, there must be a d.
*/
if (p[0] != 'd')
return FALSE;
p++;
/* And then potentially more characters without any
* further %, even if the spec does not mention this
*/
p = strchr (p, '%');
if (p)
return FALSE;
return TRUE;
}
static gchar *
promote_format_to_uint64 (const gchar * format)
{
const gchar *p = format;
gchar *promoted_format;
/* Must be called with a validated format! */
g_return_val_if_fail (validate_format (format), NULL);
/* it starts with % */
p++;
/* Following the % must be a 0, or any of d, x or u.
* x and u are not part of the spec, but don't hurt us
*/
if (p[0] == '0') {
p++;
while (g_ascii_isdigit (*p))
p++;
}
/* After any 0 and alphanumeric values, there must be a d.
* Otherwise validation would have failed
*/
g_assert (p[0] == 'd');
promoted_format =
g_strdup_printf ("%.*s" G_GINT64_MODIFIER "%s", (gint) (p - format),
format, p);
return promoted_format;
}
static gboolean
gst_mpdparser_validate_rfc1738_url (const char *s)
{
while (*s) {
if (!strchr
(";:@&=aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTuUvVwWxXyYzZ0123456789$-_.+!*'(),%/",
*s))
return FALSE;
if (*s == '%') {
/* g_ascii_isdigit returns FALSE for NUL, and || is a short circuiting
operator, so this is safe for strings ending before two hex digits */
if (!g_ascii_isxdigit (s[1]) || !g_ascii_isxdigit (s[2]))
return FALSE;
s += 2;
}
s++;
}
return TRUE;
}
void
gst_mpdparser_media_fragment_info_clear (GstMediaFragmentInfo * fragment)
{
g_free (fragment->uri);
g_free (fragment->index_uri);
}
/* API */
gboolean
gst_mpdparser_get_mpd_root_node (GstMPDRootNode ** mpd_root_node,
const gchar * data, gint size)
{
gboolean ret = FALSE;
if (data) {
xmlDocPtr doc;
xmlNode *root_element = NULL;
GST_DEBUG ("MPD file fully buffered, start parsing...");
/* parse the complete MPD file into a tree (using the libxml2 default parser API) */
/* this initialize the library and check potential ABI mismatches
* between the version it was compiled for and the actual shared
* library used
*/
LIBXML_TEST_VERSION;
/* parse "data" into a document (which is a libxml2 tree structure xmlDoc) */
doc = xmlReadMemory (data, size, "noname.xml", NULL, XML_PARSE_NONET);
if (doc == NULL) {
GST_ERROR ("failed to parse the MPD file");
ret = FALSE;
} else {
/* get the root element node */
root_element = xmlDocGetRootElement (doc);
if (root_element->type != XML_ELEMENT_NODE
|| xmlStrcmp (root_element->name, (xmlChar *) "MPD") != 0) {
GST_ERROR
("can not find the root element MPD, failed to parse the MPD file");
ret = FALSE; /* used to return TRUE before, but this seems wrong */
} else {
/* now we can parse the MPD root node and all children nodes, recursively */
ret = gst_mpdparser_parse_root_node (mpd_root_node, root_element);
}
/* free the document */
xmlFreeDoc (doc);
}
}
return ret;
}
GstMPDSegmentListNode *
gst_mpdparser_get_external_segment_list (const gchar * data, gint size,
GstMPDSegmentListNode * parent)
{
xmlDocPtr doc = NULL;
GstMPDSegmentListNode *new_segment_list = NULL;
doc = xmlReadMemory (data, size, "noname.xml", NULL, XML_PARSE_NONET);
/* NOTE: ISO/IEC 23009-1:2014 5.3.9.3.2 is saying that one or multiple SegmentList
* in external xml is allowed, however, multiple SegmentList does not make sense
* because Period/AdaptationSet/Representation allow only one SegmentList */
if (doc) {
xmlNode *root_element = xmlDocGetRootElement (doc);
if (root_element->type == XML_ELEMENT_NODE &&
xmlStrcmp (root_element->name, (xmlChar *) "SegmentList") == 0) {
gst_mpdparser_parse_segment_list_node (&new_segment_list, root_element,
parent);
}
}
if (doc)
xmlFreeDoc (doc);
return new_segment_list;
}
GList *
gst_mpdparser_get_external_periods (const gchar * data, gint size)
{
xmlDocPtr doc = NULL;
GList *new_periods = NULL;
doc = xmlReadMemory (data, size, "noname.xml", NULL, XML_PARSE_NONET);
if (doc) {
xmlNode *root_element = xmlDocGetRootElement (doc);
xmlNode *iter;
for (iter = root_element->children; iter; iter = iter->next) {
if (iter->type == XML_ELEMENT_NODE) {
if (xmlStrcmp (iter->name, (xmlChar *) "Period") == 0) {
gst_mpdparser_parse_period_node (&new_periods, iter);
} else {
goto error;
}
}
}
}
done:
if (doc)
xmlFreeDoc (doc);
return new_periods;
error:
GST_ERROR ("Failed to parse period node XML");
if (new_periods) {
g_list_free_full (new_periods, (GDestroyNotify) gst_mpd_period_node_free);
new_periods = NULL;
}
goto done;
}
GList *
gst_mpdparser_get_external_adaptation_sets (const gchar * data, gint size,
GstMPDPeriodNode * period)
{
xmlDocPtr doc = NULL;
GList *new_adaptation_sets = NULL;
doc = xmlReadMemory (data, size, "noname.xml", NULL, XML_PARSE_NONET);
/* NOTE: ISO/IEC 23009-1:2014 5.3.3.2 is saying that exactly one AdaptationSet
* in external xml is allowed */
if (doc) {
xmlNode *root_element = xmlDocGetRootElement (doc);
if (root_element->type == XML_ELEMENT_NODE &&
xmlStrcmp (root_element->name, (xmlChar *) "AdaptationSet") == 0) {
gst_mpdparser_parse_adaptation_set_node (&new_adaptation_sets,
root_element, period);
}
}
if (doc)
xmlFreeDoc (doc);
return new_adaptation_sets;
}
void
gst_mpdparser_free_stream_period (GstStreamPeriod * stream_period)
{
if (stream_period) {
g_free (stream_period);
}
}
void
gst_mpdparser_free_media_segment (GstMediaSegment * media_segment)
{
if (media_segment) {
g_free (media_segment);
}
}
void
gst_mpdparser_init_active_stream_segments (GstActiveStream * stream)
{
g_assert (stream->segments == NULL);
stream->segments = g_ptr_array_new ();
g_ptr_array_set_free_func (stream->segments,
(GDestroyNotify) gst_mpdparser_free_media_segment);
}
void
gst_mpdparser_free_active_stream (GstActiveStream * active_stream)
{
if (active_stream) {
g_free (active_stream->baseURL);
active_stream->baseURL = NULL;
g_free (active_stream->queryURL);
active_stream->queryURL = NULL;
if (active_stream->segments)
g_ptr_array_unref (active_stream->segments);
g_free (active_stream);
}
}
static gchar *
get_base_url_with_query (GstActiveStream * stream)
{
GstUri *uri;
gchar *uri_str;
if (!stream->queryURL)
return g_strdup (stream->baseURL);
uri = gst_uri_from_string (stream->baseURL);
gst_uri_set_query_string (uri, stream->queryURL);
uri_str = gst_uri_to_string (uri);
gst_uri_unref (uri);
return uri_str;
}
/*
* gst_mpdparser_get_initializationURL:
*
* Returns: (transfer full): stream initializationURL if available,
* baseURL combined with queryURL otherwise.
*/
gchar *
gst_mpdparser_get_initializationURL (GstActiveStream * stream,
GstMPDURLTypeNode * InitializationURL)
{
g_return_val_if_fail (stream != NULL, NULL);
return (InitializationURL && InitializationURL->sourceURL)
? g_strdup (InitializationURL->sourceURL)
: get_base_url_with_query (stream);
}
/*
* gst_mpdparser_get_mediaURL:
*
* Returns: (transfer full): stream mediaURL if available,
* baseURL combined with queryURL otherwise.
*/
gchar *
gst_mpdparser_get_mediaURL (GstActiveStream * stream,
GstMPDSegmentURLNode * segmentURL)
{
g_return_val_if_fail (stream != NULL, NULL);
g_return_val_if_fail (segmentURL != NULL, NULL);
return (segmentURL->media)
? g_strdup (segmentURL->media)
: get_base_url_with_query (stream);
}
/* navigation functions */
GstStreamMimeType
gst_mpdparser_representation_get_mimetype (GstMPDAdaptationSetNode * adapt_set,
GstMPDRepresentationNode * rep)
{
gchar *mime = NULL;
if (rep)
mime = GST_MPD_REPRESENTATION_BASE_NODE (rep)->mimeType;
if (mime == NULL) {
mime = GST_MPD_REPRESENTATION_BASE_NODE (adapt_set)->mimeType;
}
if (gst_mpd_helper_strncmp_ext (mime, "audio") == 0)
return GST_STREAM_AUDIO;
if (gst_mpd_helper_strncmp_ext (mime, "video") == 0)
return GST_STREAM_VIDEO;
if (gst_mpd_helper_strncmp_ext (mime, "application") == 0
|| gst_mpd_helper_strncmp_ext (mime, "text") == 0)
return GST_STREAM_APPLICATION;
return GST_STREAM_UNKNOWN;
}
/* Helper methods */
gchar *
gst_mpdparser_build_URL_from_template (const gchar * url_template,
const gchar * id, guint number, guint bandwidth, guint64 time)
{
static const gchar default_format[] = "%01d";
gchar **tokens, *token, *ret;
const gchar *format;
gint i, num_tokens;
g_return_val_if_fail (url_template != NULL, NULL);
tokens = g_strsplit_set (url_template, "$", -1);
if (!tokens) {
GST_WARNING ("Scan of URL template failed!");
return NULL;
}
num_tokens = g_strv_length (tokens);
/*
* each identifier is guarded by 2 $, which means that we must have an odd number of tokens
* An even number of tokens means the string is not valid.
*/
if ((num_tokens & 1) == 0) {
GST_ERROR ("Invalid number of tokens (%d). url_template is '%s'",
num_tokens, url_template);
g_strfreev (tokens);
return NULL;
}
for (i = 0; i < num_tokens; i++) {
token = tokens[i];
format = default_format;
/* the tokens to replace must be provided between $ characters, eg $token$
* For a string like token0$token1$token2$token3$token4, only the odd number
* tokens (1,3,...) must be parsed.
*
* Skip even tokens
*/
if ((i & 1) == 0)
continue;
if (!g_strcmp0 (token, "RepresentationID")) {
if (!gst_mpdparser_validate_rfc1738_url (id))
goto invalid_representation_id;
tokens[i] = g_strdup_printf ("%s", id);
g_free (token);
} else if (!strncmp (token, "Number", 6)) {
if (strlen (token) > 6) {
format = token + 6; /* format tag */
}
if (!validate_format (format))
goto invalid_format;
tokens[i] = g_strdup_printf (format, number);
g_free (token);
} else if (!strncmp (token, "Bandwidth", 9)) {
if (strlen (token) > 9) {
format = token + 9; /* format tag */
}
if (!validate_format (format))
goto invalid_format;
tokens[i] = g_strdup_printf (format, bandwidth);
g_free (token);
} else if (!strncmp (token, "Time", 4)) {
gchar *promoted_format;
if (strlen (token) > 4) {
format = token + 4; /* format tag */
}
if (!validate_format (format))
goto invalid_format;
promoted_format = promote_format_to_uint64 (format);
tokens[i] = g_strdup_printf (promoted_format, time);
g_free (promoted_format);
g_free (token);
} else if (!g_strcmp0 (token, "")) {
tokens[i] = g_strdup_printf ("%s", "$");
g_free (token);
} else {
/* unexpected identifier found between $ signs
*
* "If the URL contains unescaped $ symbols which do not enclose a valid
* identifier then the result of URL formation is undefined"
*/
goto invalid_format;
}
}
ret = g_strjoinv (NULL, tokens);
g_strfreev (tokens);
return ret;
invalid_format:
{
GST_ERROR ("Invalid format '%s' in '%s'", format, token);
g_strfreev (tokens);
return NULL;
}
invalid_representation_id:
{
GST_ERROR
("Representation ID string '%s' has characters invalid in an RFC 1738 URL",
id);
g_strfreev (tokens);
return NULL;
}
}
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