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gstreamer/ext/dash/gstmpdparser.c
Florin Apostol 19d604e92f dashdemux: remove unreachable code 
The stream->cur_seg_template is set to the lowest available segment
template (representation or adaptation or period, in this order).
Because the template elements are inherited, the lowest template will
have all the elements the parents had, so there is no need to check the
parent for an element that is not found in the child (eg initialisation
or index).

https://bugzilla.gnome.org/show_bug.cgi?id=752714
2015-11-02 11:37:19 +00:00

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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 <libxml/parser.h>
#include <libxml/tree.h>
#include "gstmpdparser.h"
#include "gstdash_debug.h"
#define GST_CAT_DEFAULT gst_dash_demux_debug
/* Property parsing */
static gboolean gst_mpdparser_get_xml_prop_validated_string (xmlNode * a_node,
const gchar * property_name, gchar ** property_value,
gboolean (*validator) (const char *));
static gboolean gst_mpdparser_get_xml_prop_string (xmlNode * a_node,
const gchar * property_name, gchar ** property_value);
static gboolean gst_mpdparser_get_xml_ns_prop_string (xmlNode * a_node,
const gchar * ns_name, const gchar * property_name,
gchar ** property_value);
static gboolean gst_mpdparser_get_xml_prop_string_vector_type (xmlNode * a_node,
const gchar * property_name, gchar *** property_value);
static gboolean gst_mpdparser_get_xml_prop_signed_integer (xmlNode * a_node,
const gchar * property_name, gint default_val, gint * property_value);
static gboolean gst_mpdparser_get_xml_prop_unsigned_integer (xmlNode * a_node,
const gchar * property_name, guint default_val, guint * property_value);
static gboolean gst_mpdparser_get_xml_prop_unsigned_integer_64 (xmlNode *
a_node, const gchar * property_name, guint64 default_val,
guint64 * property_value);
static gboolean gst_mpdparser_get_xml_prop_uint_vector_type (xmlNode * a_node,
const gchar * property_name, guint ** property_value, guint * value_size);
static gboolean gst_mpdparser_get_xml_prop_double (xmlNode * a_node,
const gchar * property_name, gdouble * property_value);
static gboolean gst_mpdparser_get_xml_prop_boolean (xmlNode * a_node,
const gchar * property_name, gboolean default_val,
gboolean * property_value);
static gboolean gst_mpdparser_get_xml_prop_type (xmlNode * a_node,
const gchar * property_name, GstMPDFileType * property_value);
static gboolean gst_mpdparser_get_xml_prop_SAP_type (xmlNode * a_node,
const gchar * property_name, GstSAPType * property_value);
static gboolean gst_mpdparser_get_xml_prop_range (xmlNode * a_node,
const gchar * property_name, GstRange ** property_value);
static gboolean gst_mpdparser_get_xml_prop_ratio (xmlNode * a_node,
const gchar * property_name, GstRatio ** property_value);
static gboolean gst_mpdparser_get_xml_prop_framerate (xmlNode * a_node,
const gchar * property_name, GstFrameRate ** property_value);
static gboolean gst_mpdparser_get_xml_prop_cond_uint (xmlNode * a_node,
const gchar * property_name, GstConditionalUintType ** property_value);
static gboolean gst_mpdparser_get_xml_prop_dateTime (xmlNode * a_node,
const gchar * property_name, GstDateTime ** property_value);
static gboolean gst_mpdparser_get_xml_prop_duration (xmlNode * a_node,
const gchar * property_name, guint64 default_value,
guint64 * property_value);
static gboolean gst_mpdparser_get_xml_node_content (xmlNode * a_node,
gchar ** content);
static gchar *gst_mpdparser_get_xml_node_namespace (xmlNode * a_node,
const gchar * prefix);
static gboolean gst_mpdparser_get_xml_node_as_string (xmlNode * a_node,
gchar ** content);
/* XML node parsing */
static void gst_mpdparser_parse_baseURL_node (GList ** list, xmlNode * a_node);
static void gst_mpdparser_parse_descriptor_type_node (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 (GstURLType ** pointer,
xmlNode * a_node);
static void gst_mpdparser_parse_seg_base_type_ext (GstSegmentBaseType **
pointer, xmlNode * a_node, GstSegmentBaseType * parent);
static void gst_mpdparser_parse_s_node (GQueue * queue, xmlNode * a_node);
static void gst_mpdparser_parse_segment_timeline_node (GstSegmentTimelineNode **
pointer, xmlNode * a_node);
static gboolean
gst_mpdparser_parse_mult_seg_base_type_ext (GstMultSegmentBaseType ** pointer,
xmlNode * a_node, GstMultSegmentBaseType * parent);
static gboolean gst_mpdparser_parse_segment_list_node (GstSegmentListNode **
pointer, xmlNode * a_node, GstSegmentListNode * parent);
static void
gst_mpdparser_parse_representation_base_type (GstRepresentationBaseType **
pointer, xmlNode * a_node);
static gboolean gst_mpdparser_parse_representation_node (GList ** list,
xmlNode * a_node, GstAdaptationSetNode * parent);
static gboolean gst_mpdparser_parse_adaptation_set_node (GList ** list,
xmlNode * a_node, GstPeriodNode * parent);
static void gst_mpdparser_parse_subset_node (GList ** list, xmlNode * a_node);
static gboolean
gst_mpdparser_parse_segment_template_node (GstSegmentTemplateNode ** pointer,
xmlNode * a_node, GstSegmentTemplateNode * 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 (GstMPDNode ** pointer,
xmlNode * a_node);
static void gst_mpdparser_parse_utctiming_node (GList ** list,
xmlNode * a_node);
/* Helper functions */
static guint convert_to_millisecs (guint decimals, gint pos);
static int strncmp_ext (const char *s1, const char *s2);
static GstStreamPeriod *gst_mpdparser_get_stream_period (GstMpdClient * client);
static GstSNode *gst_mpdparser_clone_s_node (GstSNode * pointer);
static GstSegmentTimelineNode
* gst_mpdparser_clone_segment_timeline (GstSegmentTimelineNode * pointer);
static GstRange *gst_mpdparser_clone_range (GstRange * range);
static GstURLType *gst_mpdparser_clone_URL (GstURLType * url);
static gchar *gst_mpdparser_parse_baseURL (GstMpdClient * client,
GstActiveStream * stream, gchar ** query);
static GstSegmentURLNode *gst_mpdparser_clone_segment_url (GstSegmentURLNode *
seg_url);
static gchar *gst_mpdparser_get_mediaURL (GstActiveStream * stream,
GstSegmentURLNode * segmentURL);
static const gchar *gst_mpdparser_get_initializationURL (GstActiveStream *
stream, GstURLType * InitializationURL);
static gchar *gst_mpdparser_build_URL_from_template (const gchar * url_template,
const gchar * id, guint number, guint bandwidth, guint64 time);
static gboolean gst_mpd_client_add_media_segment (GstActiveStream * stream,
GstSegmentURLNode * url_node, guint number, gint repeat,
guint64 scale_start, guint64 scale_duration, GstClockTime start,
GstClockTime duration);
static const gchar *gst_mpdparser_mimetype_to_caps (const gchar * mimeType);
static GstClockTime gst_mpd_client_get_segment_duration (GstMpdClient * client,
GstActiveStream * stream, guint64 * scale_duration);
static GstDateTime *gst_mpd_client_get_availability_start_time (GstMpdClient *
client);
/* Representation */
static GstRepresentationNode *gst_mpdparser_get_lowest_representation (GList *
Representations);
#if 0
static GstRepresentationNode *gst_mpdparser_get_highest_representation (GList *
Representations);
static GstRepresentationNode
* gst_mpdparser_get_representation_with_max_bandwidth (GList *
Representations, gint max_bandwidth);
#endif
static GstSegmentBaseType *gst_mpdparser_get_segment_base (GstPeriodNode *
Period, GstAdaptationSetNode * AdaptationSet,
GstRepresentationNode * Representation);
static GstSegmentListNode *gst_mpdparser_get_segment_list (GstMpdClient *
client, GstPeriodNode * Period, GstAdaptationSetNode * AdaptationSet,
GstRepresentationNode * Representation);
/* Segments */
static guint gst_mpd_client_get_segments_counts (GstMpdClient * client,
GstActiveStream * stream);
/* Memory management */
static GstSegmentTimelineNode *gst_mpdparser_segment_timeline_node_new (void);
static void gst_mpdparser_free_mpd_node (GstMPDNode * mpd_node);
static void gst_mpdparser_free_prog_info_node (GstProgramInformationNode *
prog_info_node);
static void gst_mpdparser_free_metrics_node (GstMetricsNode * metrics_node);
static void gst_mpdparser_free_metrics_range_node (GstMetricsRangeNode *
metrics_range_node);
static void gst_mpdparser_free_period_node (GstPeriodNode * period_node);
static void gst_mpdparser_free_subset_node (GstSubsetNode * subset_node);
static void gst_mpdparser_free_segment_template_node (GstSegmentTemplateNode *
segment_template_node);
static void
gst_mpdparser_free_representation_base_type (GstRepresentationBaseType *
representation_base);
static void gst_mpdparser_free_adaptation_set_node (GstAdaptationSetNode *
adaptation_set_node);
static void gst_mpdparser_free_representation_node (GstRepresentationNode *
representation_node);
static void gst_mpdparser_free_subrepresentation_node (GstSubRepresentationNode
* subrep_node);
static void gst_mpdparser_free_s_node (GstSNode * s_node);
static void gst_mpdparser_free_segment_timeline_node (GstSegmentTimelineNode *
seg_timeline);
static void gst_mpdparser_free_url_type_node (GstURLType * url_type_node);
static void gst_mpdparser_free_seg_base_type_ext (GstSegmentBaseType *
seg_base_type);
static void gst_mpdparser_free_mult_seg_base_type_ext (GstMultSegmentBaseType *
mult_seg_base_type);
static void gst_mpdparser_free_segment_list_node (GstSegmentListNode *
segment_list_node);
static void gst_mpdparser_free_segment_url_node (GstSegmentURLNode *
segment_url);
static void gst_mpdparser_free_base_url_node (GstBaseURL * base_url_node);
static void gst_mpdparser_free_descriptor_type_node (GstDescriptorType *
descriptor_type);
static void gst_mpdparser_free_content_component_node (GstContentComponentNode *
content_component_node);
static void gst_mpdparser_free_utctiming_node (GstUTCTimingNode * timing_type);
static void gst_mpdparser_free_stream_period (GstStreamPeriod * stream_period);
static void gst_mpdparser_free_media_segment (GstMediaSegment * media_segment);
static void gst_mpdparser_free_active_stream (GstActiveStream * active_stream);
static GstUri *combine_urls (GstUri * base, GList * list, gchar ** query,
guint idx);
static GList *gst_mpd_client_fetch_external_period (GstMpdClient * client,
GstPeriodNode * period_node, gboolean * error);
static GList *gst_mpd_client_fetch_external_adaptation_set (GstMpdClient *
client, GstPeriodNode * period, GstAdaptationSetNode * adapt_set,
gboolean * error);
struct GstMpdParserUtcTimingMethod
{
const gchar *name;
GstMPDUTCTimingType method;
};
static const struct GstMpdParserUtcTimingMethod
gst_mpdparser_utc_timing_methods[] = {
{"urn:mpeg:dash:utc:ntp:2014", GST_MPD_UTCTIMING_TYPE_NTP},
{"urn:mpeg:dash:utc:sntp:2014", GST_MPD_UTCTIMING_TYPE_SNTP},
{"urn:mpeg:dash:utc:http-head:2014", GST_MPD_UTCTIMING_TYPE_HTTP_HEAD},
{"urn:mpeg:dash:utc:http-xsdate:2014", GST_MPD_UTCTIMING_TYPE_HTTP_XSDATE},
{"urn:mpeg:dash:utc:http-iso:2014", GST_MPD_UTCTIMING_TYPE_HTTP_ISO},
{"urn:mpeg:dash:utc:http-ntp:2014", GST_MPD_UTCTIMING_TYPE_HTTP_NTP},
{"urn:mpeg:dash:utc:direct:2014", GST_MPD_UTCTIMING_TYPE_DIRECT},
/*
* Early working drafts used the :2012 namespace and this namespace is
* used by some DASH packagers. To work-around these packagers, we also
* accept the early draft scheme names.
*/
{"urn:mpeg:dash:utc:ntp:2012", GST_MPD_UTCTIMING_TYPE_NTP},
{"urn:mpeg:dash:utc:sntp:2012", GST_MPD_UTCTIMING_TYPE_SNTP},
{"urn:mpeg:dash:utc:http-head:2012", GST_MPD_UTCTIMING_TYPE_HTTP_HEAD},
{"urn:mpeg:dash:utc:http-xsdate:2012", GST_MPD_UTCTIMING_TYPE_HTTP_XSDATE},
{"urn:mpeg:dash:utc:http-iso:2012", GST_MPD_UTCTIMING_TYPE_HTTP_ISO},
{"urn:mpeg:dash:utc:http-ntp:2012", GST_MPD_UTCTIMING_TYPE_HTTP_NTP},
{"urn:mpeg:dash:utc:direct:2012", GST_MPD_UTCTIMING_TYPE_DIRECT},
{NULL, 0}
};
/* functions to parse node namespaces, content and properties */
static gboolean
gst_mpdparser_get_xml_prop_validated_string (xmlNode * a_node,
const gchar * property_name, gchar ** property_value,
gboolean (*validate) (const char *))
{
xmlChar *prop_string;
gboolean exists = FALSE;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
if (validate && !(*validate) ((const char *) prop_string)) {
GST_WARNING ("Validation failure: %s", prop_string);
xmlFree (prop_string);
return FALSE;
}
*property_value = (gchar *) prop_string;
exists = TRUE;
GST_LOG (" - %s: %s", property_name, prop_string);
}
return exists;
}
static gboolean
gst_mpdparser_get_xml_ns_prop_string (xmlNode * a_node,
const gchar * ns_name, const gchar * property_name, gchar ** property_value)
{
xmlChar *prop_string;
gboolean exists = FALSE;
prop_string =
xmlGetNsProp (a_node, (const xmlChar *) property_name,
(const xmlChar *) ns_name);
if (prop_string) {
*property_value = (gchar *) prop_string;
exists = TRUE;
GST_LOG (" - %s:%s: %s", ns_name, property_name, prop_string);
}
return exists;
}
static gboolean
gst_mpdparser_get_xml_prop_string (xmlNode * a_node,
const gchar * property_name, gchar ** property_value)
{
return gst_mpdparser_get_xml_prop_validated_string (a_node, property_name,
property_value, NULL);
}
static gboolean
gst_mpdparser_validate_no_whitespace (const char *s)
{
return !strpbrk (s, "\r\n\t ");
}
static gboolean
gst_mpdparser_get_xml_prop_string_no_whitespace (xmlNode * a_node,
const gchar * property_name, gchar ** property_value)
{
return gst_mpdparser_get_xml_prop_validated_string (a_node, property_name,
property_value, gst_mpdparser_validate_no_whitespace);
}
static gboolean
gst_mpdparser_get_xml_prop_string_vector_type (xmlNode * a_node,
const gchar * property_name, gchar *** property_value)
{
xmlChar *prop_string;
gchar **prop_string_vector = NULL;
guint i = 0;
gboolean exists = FALSE;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
prop_string_vector = g_strsplit ((gchar *) prop_string, " ", -1);
if (prop_string_vector) {
exists = TRUE;
*property_value = prop_string_vector;
GST_LOG (" - %s:", property_name);
while (prop_string_vector[i]) {
GST_LOG (" %s", prop_string_vector[i]);
i++;
}
} else {
GST_WARNING ("Scan of string vector property failed!");
}
xmlFree (prop_string);
}
return exists;
}
static gboolean
gst_mpdparser_get_xml_prop_signed_integer (xmlNode * a_node,
const gchar * property_name, gint default_val, gint * property_value)
{
xmlChar *prop_string;
gboolean exists = FALSE;
*property_value = default_val;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
if (sscanf ((const gchar *) prop_string, "%d", property_value) == 1) {
exists = TRUE;
GST_LOG (" - %s: %d", property_name, *property_value);
} else {
GST_WARNING
("failed to parse signed integer property %s from xml string %s",
property_name, prop_string);
}
xmlFree (prop_string);
}
return exists;
}
static gboolean
gst_mpdparser_get_xml_prop_unsigned_integer (xmlNode * a_node,
const gchar * property_name, guint default_val, guint * property_value)
{
xmlChar *prop_string;
gboolean exists = FALSE;
*property_value = default_val;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
if (sscanf ((gchar *) prop_string, "%u", property_value) == 1 &&
strstr ((gchar *) prop_string, "-") == NULL) {
exists = TRUE;
GST_LOG (" - %s: %u", property_name, *property_value);
} else {
GST_WARNING
("failed to parse unsigned integer property %s from xml string %s",
property_name, prop_string);
/* sscanf might have written to *property_value. Restore to default */
*property_value = default_val;
}
xmlFree (prop_string);
}
return exists;
}
static gboolean
gst_mpdparser_get_xml_prop_unsigned_integer_64 (xmlNode * a_node,
const gchar * property_name, guint64 default_val, guint64 * property_value)
{
xmlChar *prop_string;
gboolean exists = FALSE;
*property_value = default_val;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
if (sscanf ((gchar *) prop_string, "%" G_GUINT64_FORMAT,
property_value) == 1 &&
strstr ((gchar *) prop_string, "-") == NULL) {
exists = TRUE;
GST_LOG (" - %s: %" G_GUINT64_FORMAT, property_name, *property_value);
} else {
GST_WARNING
("failed to parse unsigned integer property %s from xml string %s",
property_name, prop_string);
/* sscanf might have written to *property_value. Restore to default */
*property_value = default_val;
}
xmlFree (prop_string);
}
return exists;
}
static gboolean
gst_mpdparser_get_xml_prop_uint_vector_type (xmlNode * a_node,
const gchar * property_name, guint ** property_value, guint * value_size)
{
xmlChar *prop_string;
gchar **str_vector;
guint *prop_uint_vector = NULL, i;
gboolean exists = FALSE;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
str_vector = g_strsplit ((gchar *) prop_string, " ", -1);
if (str_vector) {
*value_size = g_strv_length (str_vector);
prop_uint_vector = g_malloc (*value_size * sizeof (guint));
if (prop_uint_vector) {
exists = TRUE;
GST_LOG (" - %s:", property_name);
for (i = 0; i < *value_size; i++) {
if (sscanf ((gchar *) str_vector[i], "%u", &prop_uint_vector[i]) == 1
&& strstr (str_vector[i], "-") == NULL) {
GST_LOG (" %u", prop_uint_vector[i]);
} else {
GST_WARNING
("failed to parse uint vector type property %s from xml string %s",
property_name, str_vector[i]);
/* there is no special value to put in prop_uint_vector[i] to
* signal it is invalid, so we just clean everything and return
* FALSE
*/
g_free (prop_uint_vector);
prop_uint_vector = NULL;
exists = FALSE;
break;
}
}
*property_value = prop_uint_vector;
} else {
GST_WARNING ("Array allocation failed!");
}
} else {
GST_WARNING ("Scan of uint vector property failed!");
}
xmlFree (prop_string);
g_strfreev (str_vector);
}
return exists;
}
static gboolean
gst_mpdparser_get_xml_prop_double (xmlNode * a_node,
const gchar * property_name, gdouble * property_value)
{
xmlChar *prop_string;
gboolean exists = FALSE;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
if (sscanf ((gchar *) prop_string, "%lf", property_value) == 1) {
exists = TRUE;
GST_LOG (" - %s: %lf", property_name, *property_value);
} else {
GST_WARNING ("failed to parse double property %s from xml string %s",
property_name, prop_string);
}
xmlFree (prop_string);
}
return exists;
}
static gboolean
gst_mpdparser_get_xml_prop_boolean (xmlNode * a_node,
const gchar * property_name, gboolean default_val,
gboolean * property_value)
{
xmlChar *prop_string;
gboolean exists = FALSE;
*property_value = default_val;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
if (xmlStrcmp (prop_string, (xmlChar *) "false") == 0) {
exists = TRUE;
*property_value = FALSE;
GST_LOG (" - %s: false", property_name);
} else if (xmlStrcmp (prop_string, (xmlChar *) "true") == 0) {
exists = TRUE;
*property_value = TRUE;
GST_LOG (" - %s: true", property_name);
} else {
GST_WARNING ("failed to parse boolean property %s from xml string %s",
property_name, prop_string);
}
xmlFree (prop_string);
}
return exists;
}
static gboolean
gst_mpdparser_get_xml_prop_type (xmlNode * a_node,
const gchar * property_name, GstMPDFileType * property_value)
{
xmlChar *prop_string;
gboolean exists = FALSE;
*property_value = GST_MPD_FILE_TYPE_STATIC; /* default */
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
if (xmlStrcmp (prop_string, (xmlChar *) "OnDemand") == 0
|| xmlStrcmp (prop_string, (xmlChar *) "static") == 0) {
exists = TRUE;
*property_value = GST_MPD_FILE_TYPE_STATIC;
GST_LOG (" - %s: static", property_name);
} else if (xmlStrcmp (prop_string, (xmlChar *) "Live") == 0
|| xmlStrcmp (prop_string, (xmlChar *) "dynamic") == 0) {
exists = TRUE;
*property_value = GST_MPD_FILE_TYPE_DYNAMIC;
GST_LOG (" - %s: dynamic", property_name);
} else {
GST_WARNING ("failed to parse MPD type property %s from xml string %s",
property_name, prop_string);
}
xmlFree (prop_string);
}
return exists;
}
static gboolean
gst_mpdparser_get_xml_prop_SAP_type (xmlNode * a_node,
const gchar * property_name, GstSAPType * property_value)
{
xmlChar *prop_string;
guint prop_SAP_type = 0;
gboolean exists = FALSE;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
if (sscanf ((gchar *) prop_string, "%u", &prop_SAP_type) == 1
&& prop_SAP_type <= 6) {
exists = TRUE;
*property_value = (GstSAPType) prop_SAP_type;
GST_LOG (" - %s: %u", property_name, prop_SAP_type);
} else {
GST_WARNING
("failed to parse unsigned integer property %s from xml string %s",
property_name, prop_string);
}
xmlFree (prop_string);
}
return exists;
}
static gboolean
gst_mpdparser_get_xml_prop_range (xmlNode * a_node, const gchar * property_name,
GstRange ** property_value)
{
xmlChar *prop_string;
guint64 first_byte_pos = 0, last_byte_pos = -1;
guint len, pos;
gchar *str;
gboolean exists = FALSE;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
len = xmlStrlen (prop_string);
str = (gchar *) prop_string;
GST_TRACE ("range: %s, len %d", str, len);
/* read "-" */
pos = strcspn (str, "-");
if (pos >= len) {
GST_TRACE ("pos %d >= len %d", pos, len);
goto error;
}
/* read first_byte_pos */
if (pos != 0) {
/* replace str[pos] with '\0' to allow sscanf to not be confused by
* the minus sign (eg " -1" (observe the space before -) would otherwise
* be interpreted as range -1 to 1)
*/
str[pos] = 0;
if (sscanf (str, "%" G_GUINT64_FORMAT, &first_byte_pos) != 1 ||
strstr (str, "-") != NULL) {
/* sscanf failed or it found a negative number */
/* restore the '-' sign */
str[pos] = '-';
goto error;
}
/* restore the '-' sign */
str[pos] = '-';
}
/* read last_byte_pos */
if (pos < (len - 1)) {
if (sscanf (str + pos + 1, "%" G_GUINT64_FORMAT, &last_byte_pos) != 1 ||
strstr (str + pos + 1, "-") != NULL) {
goto error;
}
}
/* malloc return data structure */
*property_value = g_slice_new0 (GstRange);
exists = TRUE;
(*property_value)->first_byte_pos = first_byte_pos;
(*property_value)->last_byte_pos = last_byte_pos;
xmlFree (prop_string);
GST_LOG (" - %s: %" G_GUINT64_FORMAT "-%" G_GUINT64_FORMAT,
property_name, first_byte_pos, last_byte_pos);
}
return exists;
error:
GST_WARNING ("failed to parse property %s from xml string %s", property_name,
prop_string);
xmlFree (prop_string);
return FALSE;
}
static gboolean
gst_mpdparser_get_xml_prop_ratio (xmlNode * a_node,
const gchar * property_name, GstRatio ** property_value)
{
xmlChar *prop_string;
guint num = 0, den = 1;
guint len, pos;
gchar *str;
gboolean exists = FALSE;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
len = xmlStrlen (prop_string);
str = (gchar *) prop_string;
GST_TRACE ("ratio: %s, len %d", str, len);
/* read ":" */
pos = strcspn (str, ":");
if (pos >= len) {
GST_TRACE ("pos %d >= len %d", pos, len);
goto error;
}
/* search for negative sign */
if (strstr (str, "-") != NULL) {
goto error;
}
/* read num */
if (pos != 0) {
if (sscanf (str, "%u", &num) != 1) {
goto error;
}
}
/* read den */
if (pos < (len - 1)) {
if (sscanf (str + pos + 1, "%u", &den) != 1) {
goto error;
}
}
/* malloc return data structure */
*property_value = g_slice_new0 (GstRatio);
exists = TRUE;
(*property_value)->num = num;
(*property_value)->den = den;
xmlFree (prop_string);
GST_LOG (" - %s: %u:%u", property_name, num, den);
}
return exists;
error:
GST_WARNING ("failed to parse property %s from xml string %s", property_name,
prop_string);
xmlFree (prop_string);
return FALSE;
}
static gboolean
gst_mpdparser_get_xml_prop_framerate (xmlNode * a_node,
const gchar * property_name, GstFrameRate ** property_value)
{
xmlChar *prop_string;
guint num = 0, den = 1;
guint len, pos;
gchar *str;
gboolean exists = FALSE;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
len = xmlStrlen (prop_string);
str = (gchar *) prop_string;
GST_TRACE ("framerate: %s, len %d", str, len);
/* search for negative sign */
if (strstr (str, "-") != NULL) {
goto error;
}
/* read "/" if available */
pos = strcspn (str, "/");
/* read num */
if (pos != 0) {
if (sscanf (str, "%u", &num) != 1) {
goto error;
}
}
/* read den (if available) */
if (pos < (len - 1)) {
if (sscanf (str + pos + 1, "%u", &den) != 1) {
goto error;
}
}
/* alloc return data structure */
*property_value = g_slice_new0 (GstFrameRate);
exists = TRUE;
(*property_value)->num = num;
(*property_value)->den = den;
xmlFree (prop_string);
if (den == 1)
GST_LOG (" - %s: %u", property_name, num);
else
GST_LOG (" - %s: %u/%u", property_name, num, den);
}
return exists;
error:
GST_WARNING ("failed to parse property %s from xml string %s", property_name,
prop_string);
xmlFree (prop_string);
return FALSE;
}
static gboolean
gst_mpdparser_get_xml_prop_cond_uint (xmlNode * a_node,
const gchar * property_name, GstConditionalUintType ** property_value)
{
xmlChar *prop_string;
gchar *str;
gboolean flag;
guint val;
gboolean exists = FALSE;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
str = (gchar *) prop_string;
GST_TRACE ("conditional uint: %s", str);
if (strcmp (str, "false") == 0) {
flag = FALSE;
val = 0;
} else if (strcmp (str, "true") == 0) {
flag = TRUE;
val = 0;
} else {
flag = TRUE;
if (sscanf (str, "%u", &val) != 1 || strstr (str, "-") != NULL)
goto error;
}
/* alloc return data structure */
*property_value = g_slice_new0 (GstConditionalUintType);
exists = TRUE;
(*property_value)->flag = flag;
(*property_value)->value = val;
xmlFree (prop_string);
GST_LOG (" - %s: flag=%s val=%u", property_name, flag ? "true" : "false",
val);
}
return exists;
error:
GST_WARNING ("failed to parse property %s from xml string %s", property_name,
prop_string);
xmlFree (prop_string);
return FALSE;
}
/*
DateTime Data Type
The dateTime data type is used to specify a date and a time.
The dateTime is specified in the following form "YYYY-MM-DDThh:mm:ss" where:
* YYYY indicates the year
* MM indicates the month
* DD indicates the day
* T indicates the start of the required time section
* hh indicates the hour
* mm indicates the minute
* ss indicates the second
Note: All components are required!
*/
static gboolean
gst_mpdparser_get_xml_prop_dateTime (xmlNode * a_node,
const gchar * property_name, GstDateTime ** property_value)
{
xmlChar *prop_string;
gchar *str;
gint ret, pos;
gint year, month, day, hour, minute, second;
gboolean exists = FALSE;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
str = (gchar *) prop_string;
GST_TRACE ("dateTime: %s, len %d", str, xmlStrlen (prop_string));
/* parse year */
ret = sscanf (str, "%d", &year);
if (ret != 1 || year <= 0)
goto error;
pos = strcspn (str, "-");
str += (pos + 1);
GST_TRACE (" - year %d", year);
/* parse month */
ret = sscanf (str, "%d", &month);
if (ret != 1 || month <= 0)
goto error;
pos = strcspn (str, "-");
str += (pos + 1);
GST_TRACE (" - month %d", month);
/* parse day */
ret = sscanf (str, "%d", &day);
if (ret != 1 || day <= 0)
goto error;
pos = strcspn (str, "T");
str += (pos + 1);
GST_TRACE (" - day %d", day);
/* parse hour */
ret = sscanf (str, "%d", &hour);
if (ret != 1 || hour < 0)
goto error;
pos = strcspn (str, ":");
str += (pos + 1);
GST_TRACE (" - hour %d", hour);
/* parse minute */
ret = sscanf (str, "%d", &minute);
if (ret != 1 || minute < 0)
goto error;
pos = strcspn (str, ":");
str += (pos + 1);
GST_TRACE (" - minute %d", minute);
/* parse second */
ret = sscanf (str, "%d", &second);
if (ret != 1 || second < 0)
goto error;
GST_TRACE (" - second %d", second);
GST_LOG (" - %s: %4d/%02d/%02d %02d:%02d:%02d", property_name,
year, month, day, hour, minute, second);
exists = TRUE;
*property_value =
gst_date_time_new (0, year, month, day, hour, minute, second);
xmlFree (prop_string);
}
return exists;
error:
GST_WARNING ("failed to parse property %s from xml string %s", property_name,
prop_string);
xmlFree (prop_string);
return FALSE;
}
/*
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
*/
/* this function computes decimals * 10 ^ (3 - pos) */
static guint
convert_to_millisecs (guint decimals, gint pos)
{
guint num = 1, den = 1;
gint i = 3 - pos;
while (i < 0) {
den *= 10;
i++;
}
while (i > 0) {
num *= 10;
i--;
}
/* if i == 0 we have exactly 3 decimals and nothing to do */
return decimals * num / den;
}
static gboolean
accumulate (guint64 * v, guint64 mul, guint64 add)
{
guint64 tmp;
if (*v > G_MAXUINT64 / mul)
return FALSE;
tmp = *v * mul;
if (tmp > G_MAXUINT64 - add)
return FALSE;
*v = tmp + add;
return TRUE;
}
static gboolean
gst_mpdparser_parse_duration (const char *str, guint64 * value)
{
gint ret, len, pos, posT;
gint years = -1, months = -1, days = -1, hours = -1, minutes = -1, seconds =
-1, decimals = -1, read;
gboolean have_ms = FALSE;
guint64 tmp_value;
len = strlen (str);
GST_TRACE ("duration: %s, len %d", str, len);
if (strspn (str, "PT0123456789., \tHMDSY") < len) {
GST_WARNING ("Invalid character found: '%s'", str);
goto error;
}
/* skip leading/trailing whitespace */
while (strchr (" \t", str[0])) {
str++;
len--;
}
while (len > 0 && strchr (" \t", str[len - 1]))
--len;
/* read "P" for period */
if (str[0] != 'P') {
GST_WARNING ("P not found at the beginning of the string!");
goto error;
}
str++;
len--;
/* read "T" for time (if present) */
posT = strcspn (str, "T");
len -= posT;
if (posT > 0) {
/* there is some room between P and T, so there must be a period section */
/* read years, months, days */
do {
GST_TRACE ("parsing substring %s", str);
pos = strcspn (str, "YMD");
ret = sscanf (str, "%u", &read);
if (ret != 1) {
GST_WARNING ("can not read integer value from string %s!", str);
goto error;
}
switch (str[pos]) {
case 'Y':
if (years != -1 || months != -1 || days != -1) {
GST_WARNING ("year, month or day was already set");
goto error;
}
years = read;
break;
case 'M':
if (months != -1 || days != -1) {
GST_WARNING ("month or day was already set");
goto error;
}
months = read;
if (months >= 12) {
GST_WARNING ("Month out of range");
goto error;
}
break;
case 'D':
if (days != -1) {
GST_WARNING ("day was already set");
goto error;
}
days = read;
if (days >= 31) {
GST_WARNING ("Day out of range");
goto error;
}
break;
default:
GST_WARNING ("unexpected char %c!", str[pos]);
goto error;
break;
}
GST_TRACE ("read number %u type %c", read, str[pos]);
str += (pos + 1);
posT -= (pos + 1);
} while (posT > 0);
}
if (years == -1)
years = 0;
if (months == -1)
months = 0;
if (days == -1)
days = 0;
GST_TRACE ("Y:M:D=%d:%d:%d", years, months, days);
/* read "T" for time (if present) */
/* here T is at pos == 0 */
str++;
len--;
pos = 0;
if (pos < len) {
/* T found, there is a time section */
/* read hours, minutes, seconds, hundredths of second */
do {
GST_TRACE ("parsing substring %s", str);
pos = strcspn (str, "HMS,.");
ret = sscanf (str, "%u", &read);
if (ret != 1) {
GST_WARNING ("can not read integer value from string %s!", str);
goto error;
}
switch (str[pos]) {
case 'H':
if (hours != -1 || minutes != -1 || seconds != -1) {
GST_WARNING ("hour, minute or second was already set");
goto error;
}
hours = read;
if (hours >= 24) {
GST_WARNING ("Hour out of range");
goto error;
}
break;
case 'M':
if (minutes != -1 || seconds != -1) {
GST_WARNING ("minute or second was already set");
goto error;
}
minutes = read;
if (minutes >= 60) {
GST_WARNING ("Minute out of range");
goto error;
}
break;
case 'S':
if (have_ms) {
/* we have read the decimal part of the seconds */
decimals = convert_to_millisecs (read, pos);
GST_TRACE ("decimal number %u (%d digits) -> %d ms", read, pos,
decimals);
} else {
if (seconds != -1) {
GST_WARNING ("second was already set");
goto error;
}
/* no decimals */
seconds = read;
}
break;
case '.':
case ',':
/* we have read the integer part of a decimal number in seconds */
if (seconds != -1) {
GST_WARNING ("second was already set");
goto error;
}
seconds = read;
have_ms = TRUE;
break;
default:
GST_WARNING ("unexpected char %c!", str[pos]);
goto error;
break;
}
GST_TRACE ("read number %u type %c", read, str[pos]);
str += pos + 1;
len -= (pos + 1);
} while (len > 0);
}
if (hours == -1)
hours = 0;
if (minutes == -1)
minutes = 0;
if (seconds == -1)
seconds = 0;
if (decimals == -1)
decimals = 0;
GST_TRACE ("H:M:S.MS=%d:%d:%d.%03d", hours, minutes, seconds, decimals);
tmp_value = 0;
if (!accumulate (&tmp_value, 1, years)
|| !accumulate (&tmp_value, 365, months * 30)
|| !accumulate (&tmp_value, 1, days)
|| !accumulate (&tmp_value, 24, hours)
|| !accumulate (&tmp_value, 60, minutes)
|| !accumulate (&tmp_value, 60, seconds)
|| !accumulate (&tmp_value, 1000, decimals))
goto error;
/* ensure it can be converted from milliseconds to nanoseconds */
if (tmp_value > G_MAXUINT64 / 1000000)
goto error;
*value = tmp_value;
return TRUE;
error:
return FALSE;
}
static gboolean
gst_mpdparser_get_xml_prop_duration (xmlNode * a_node,
const gchar * property_name, guint64 default_value,
guint64 * property_value)
{
xmlChar *prop_string;
gchar *str;
gboolean exists = FALSE;
*property_value = default_value;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
str = (gchar *) prop_string;
if (!gst_mpdparser_parse_duration (str, property_value))
goto error;
GST_LOG (" - %s: %" G_GUINT64_FORMAT, property_name, *property_value);
xmlFree (prop_string);
exists = TRUE;
}
return exists;
error:
xmlFree (prop_string);
return FALSE;
}
static gboolean
gst_mpdparser_get_xml_node_content (xmlNode * a_node, gchar ** content)
{
xmlChar *node_content = NULL;
gboolean exists = FALSE;
node_content = xmlNodeGetContent (a_node);
if (node_content) {
exists = TRUE;
*content = (gchar *) node_content;
GST_LOG (" - %s: %s", a_node->name, *content);
}
return exists;
}
static gboolean
gst_mpdparser_get_xml_node_as_string (xmlNode * a_node, gchar ** content)
{
gboolean exists = FALSE;
const char *txt_encoding;
xmlOutputBufferPtr out_buf;
txt_encoding = (const char *) a_node->doc->encoding;
out_buf = xmlAllocOutputBuffer (NULL);
g_assert (out_buf != NULL);
xmlNodeDumpOutput (out_buf, a_node->doc, a_node, 0, 0, txt_encoding);
xmlOutputBufferFlush (out_buf);
#ifdef LIBXML2_NEW_BUFFER
if (xmlOutputBufferGetSize (out_buf) > 0) {
*content =
(gchar *) xmlStrndup (xmlOutputBufferGetContent (out_buf),
xmlOutputBufferGetSize (out_buf));
exists = TRUE;
}
#else
if (out_buf->conv && out_buf->conv->use > 0) {
*content =
(gchar *) xmlStrndup (out_buf->conv->content, out_buf->conv->use);
exists = TRUE;
} else if (out_buf->buffer && out_buf->buffer->use > 0) {
*content =
(gchar *) xmlStrndup (out_buf->buffer->content, out_buf->buffer->use);
exists = TRUE;
}
#endif // LIBXML2_NEW_BUFFER
(void) xmlOutputBufferClose (out_buf);
if (exists) {
GST_LOG (" - %s: %s", a_node->name, *content);
}
return exists;
}
static gchar *
gst_mpdparser_get_xml_node_namespace (xmlNode * a_node, const gchar * prefix)
{
xmlNs *curr_ns;
gchar *namespace = NULL;
if (prefix == NULL) {
/* return the default namespace */
if (a_node->ns) {
namespace = xmlMemStrdup ((const gchar *) a_node->ns->href);
if (namespace) {
GST_LOG (" - default namespace: %s", namespace);
}
}
} else {
/* look for the specified prefix in the namespace list */
for (curr_ns = a_node->ns; curr_ns; curr_ns = curr_ns->next) {
if (xmlStrcmp (curr_ns->prefix, (xmlChar *) prefix) == 0) {
namespace = xmlMemStrdup ((const gchar *) curr_ns->href);
if (namespace) {
GST_LOG (" - %s namespace: %s", curr_ns->prefix, curr_ns->href);
}
}
}
}
return namespace;
}
static void
gst_mpdparser_parse_baseURL_node (GList ** list, xmlNode * a_node)
{
GstBaseURL *new_base_url;
new_base_url = g_slice_new0 (GstBaseURL);
*list = g_list_append (*list, new_base_url);
GST_LOG ("content of BaseURL node:");
gst_mpdparser_get_xml_node_content (a_node, &new_base_url->baseURL);
GST_LOG ("attributes of BaseURL node:");
gst_mpdparser_get_xml_prop_string (a_node, "serviceLocation",
&new_base_url->serviceLocation);
gst_mpdparser_get_xml_prop_string (a_node, "byteRange",
&new_base_url->byteRange);
}
static void
gst_mpdparser_parse_descriptor_type_node (GList ** list, xmlNode * a_node)
{
GstDescriptorType *new_descriptor;
new_descriptor = g_slice_new0 (GstDescriptorType);
*list = g_list_append (*list, new_descriptor);
GST_LOG ("attributes of %s node:", a_node->name);
gst_mpdparser_get_xml_prop_string (a_node, "schemeIdUri",
&new_descriptor->schemeIdUri);
if (!gst_mpdparser_get_xml_prop_string (a_node, "value",
&new_descriptor->value)) {
/* if no value attribute, use XML string representation of the node */
gst_mpdparser_get_xml_node_as_string (a_node, &new_descriptor->value);
}
}
static void
gst_mpdparser_parse_content_component_node (GList ** list, xmlNode * a_node)
{
xmlNode *cur_node;
GstContentComponentNode *new_content_component;
new_content_component = g_slice_new0 (GstContentComponentNode);
*list = g_list_append (*list, new_content_component);
GST_LOG ("attributes of ContentComponent node:");
gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "id", 0,
&new_content_component->id);
gst_mpdparser_get_xml_prop_string (a_node, "lang",
&new_content_component->lang);
gst_mpdparser_get_xml_prop_string (a_node, "contentType",
&new_content_component->contentType);
gst_mpdparser_get_xml_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_node
(&new_content_component->Accessibility, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Role") == 0) {
gst_mpdparser_parse_descriptor_type_node (&new_content_component->Role,
cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Rating") == 0) {
gst_mpdparser_parse_descriptor_type_node
(&new_content_component->Rating, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Viewpoint") == 0) {
gst_mpdparser_parse_descriptor_type_node
(&new_content_component->Viewpoint, cur_node);
}
}
}
}
static void
gst_mpdparser_parse_location_node (GList ** list, xmlNode * a_node)
{
gchar *location = NULL;
GST_LOG ("content of Location node:");
if (gst_mpdparser_get_xml_node_content (a_node, &location))
*list = g_list_append (*list, location);
}
static void
gst_mpdparser_parse_subrepresentation_node (GList ** list, xmlNode * a_node)
{
GstSubRepresentationNode *new_subrep;
new_subrep = g_slice_new0 (GstSubRepresentationNode);
*list = g_list_append (*list, new_subrep);
GST_LOG ("attributes of SubRepresentation node:");
gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "level", 0,
&new_subrep->level);
gst_mpdparser_get_xml_prop_uint_vector_type (a_node, "dependencyLevel",
&new_subrep->dependencyLevel, &new_subrep->size);
gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "bandwidth", 0,
&new_subrep->bandwidth);
gst_mpdparser_get_xml_prop_string_vector_type (a_node,
"contentComponent", &new_subrep->contentComponent);
/* RepresentationBase extension */
gst_mpdparser_parse_representation_base_type (&new_subrep->RepresentationBase,
a_node);
}
static GstSegmentURLNode *
gst_mpdparser_clone_segment_url (GstSegmentURLNode * seg_url)
{
GstSegmentURLNode *clone = NULL;
if (seg_url) {
clone = g_slice_new0 (GstSegmentURLNode);
clone->media = xmlMemStrdup (seg_url->media);
clone->mediaRange = gst_mpdparser_clone_range (seg_url->mediaRange);
clone->index = xmlMemStrdup (seg_url->index);
clone->indexRange = gst_mpdparser_clone_range (seg_url->indexRange);
}
return clone;
}
static void
gst_mpdparser_parse_segment_url_node (GList ** list, xmlNode * a_node)
{
GstSegmentURLNode *new_segment_url;
new_segment_url = g_slice_new0 (GstSegmentURLNode);
*list = g_list_append (*list, new_segment_url);
GST_LOG ("attributes of SegmentURL node:");
gst_mpdparser_get_xml_prop_string (a_node, "media", &new_segment_url->media);
gst_mpdparser_get_xml_prop_range (a_node, "mediaRange",
&new_segment_url->mediaRange);
gst_mpdparser_get_xml_prop_string (a_node, "index", &new_segment_url->index);
gst_mpdparser_get_xml_prop_range (a_node, "indexRange",
&new_segment_url->indexRange);
}
static void
gst_mpdparser_parse_url_type_node (GstURLType ** pointer, xmlNode * a_node)
{
GstURLType *new_url_type;
gst_mpdparser_free_url_type_node (*pointer);
*pointer = new_url_type = g_slice_new0 (GstURLType);
GST_LOG ("attributes of URLType node:");
gst_mpdparser_get_xml_prop_string (a_node, "sourceURL",
&new_url_type->sourceURL);
gst_mpdparser_get_xml_prop_range (a_node, "range", &new_url_type->range);
}
static void
gst_mpdparser_parse_seg_base_type_ext (GstSegmentBaseType ** pointer,
xmlNode * a_node, GstSegmentBaseType * parent)
{
xmlNode *cur_node;
GstSegmentBaseType *seg_base_type;
guint intval;
guint64 int64val;
gboolean boolval;
GstRange *rangeval;
gst_mpdparser_free_seg_base_type_ext (*pointer);
*pointer = seg_base_type = g_slice_new0 (GstSegmentBaseType);
/* 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_mpdparser_clone_range (parent->indexRange);
seg_base_type->indexRangeExact = parent->indexRangeExact;
seg_base_type->Initialization =
gst_mpdparser_clone_URL (parent->Initialization);
seg_base_type->RepresentationIndex =
gst_mpdparser_clone_URL (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_mpdparser_get_xml_prop_unsigned_integer (a_node, "timescale", 1,
&intval)) {
seg_base_type->timescale = intval;
}
if (gst_mpdparser_get_xml_prop_unsigned_integer_64 (a_node,
"presentationTimeOffset", 0, &int64val)) {
seg_base_type->presentationTimeOffset = int64val;
}
if (gst_mpdparser_get_xml_prop_range (a_node, "indexRange", &rangeval)) {
if (seg_base_type->indexRange) {
g_slice_free (GstRange, seg_base_type->indexRange);
}
seg_base_type->indexRange = rangeval;
}
if (gst_mpdparser_get_xml_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 GstSNode *
gst_mpdparser_clone_s_node (GstSNode * pointer)
{
GstSNode *clone = NULL;
if (pointer) {
clone = g_slice_new0 (GstSNode);
clone->t = pointer->t;
clone->d = pointer->d;
clone->r = pointer->r;
}
return clone;
}
static void
gst_mpdparser_parse_s_node (GQueue * queue, xmlNode * a_node)
{
GstSNode *new_s_node;
new_s_node = g_slice_new0 (GstSNode);
g_queue_push_tail (queue, new_s_node);
GST_LOG ("attributes of S node:");
gst_mpdparser_get_xml_prop_unsigned_integer_64 (a_node, "t", 0,
&new_s_node->t);
gst_mpdparser_get_xml_prop_unsigned_integer_64 (a_node, "d", 0,
&new_s_node->d);
gst_mpdparser_get_xml_prop_signed_integer (a_node, "r", 0, &new_s_node->r);
}
static GstSegmentTimelineNode *
gst_mpdparser_clone_segment_timeline (GstSegmentTimelineNode * pointer)
{
GstSegmentTimelineNode *clone = NULL;
if (pointer) {
clone = gst_mpdparser_segment_timeline_node_new ();
if (clone) {
GList *list;
for (list = g_queue_peek_head_link (&pointer->S); list;
list = g_list_next (list)) {
GstSNode *s_node;
s_node = (GstSNode *) list->data;
if (s_node) {
g_queue_push_tail (&clone->S, gst_mpdparser_clone_s_node (s_node));
}
}
} else {
GST_WARNING ("Allocation of SegmentTimeline node failed!");
}
}
return clone;
}
static void
gst_mpdparser_parse_segment_timeline_node (GstSegmentTimelineNode ** pointer,
xmlNode * a_node)
{
xmlNode *cur_node;
GstSegmentTimelineNode *new_seg_timeline;
gst_mpdparser_free_segment_timeline_node (*pointer);
*pointer = new_seg_timeline = gst_mpdparser_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_type_ext (GstMultSegmentBaseType ** pointer,
xmlNode * a_node, GstMultSegmentBaseType * parent)
{
xmlNode *cur_node;
GstMultSegmentBaseType *mult_seg_base_type;
guint intval;
gboolean has_timeline = FALSE, has_duration = FALSE;
gst_mpdparser_free_mult_seg_base_type_ext (*pointer);
mult_seg_base_type = g_slice_new0 (GstMultSegmentBaseType);
mult_seg_base_type->duration = 0;
mult_seg_base_type->startNumber = 1;
/* Inherit attribute values from parent */
if (parent) {
mult_seg_base_type->duration = parent->duration;
mult_seg_base_type->startNumber = parent->startNumber;
mult_seg_base_type->SegmentTimeline =
gst_mpdparser_clone_segment_timeline (parent->SegmentTimeline);
mult_seg_base_type->BitstreamSwitching =
gst_mpdparser_clone_URL (parent->BitstreamSwitching);
}
GST_LOG ("attributes of MultipleSegmentBaseType extension:");
if (gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "duration", 0,
&intval)) {
mult_seg_base_type->duration = intval;
has_duration = TRUE;
}
if (gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "startNumber", 1,
&intval)) {
mult_seg_base_type->startNumber = intval;
}
GST_LOG ("extension of MultipleSegmentBaseType extension:");
gst_mpdparser_parse_seg_base_type_ext (&mult_seg_base_type->SegBaseType,
a_node, (parent ? parent->SegBaseType : 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_type->SegmentTimeline, cur_node);
has_timeline = TRUE;
} 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_type->BitstreamSwitching, cur_node);
}
}
}
if (!has_duration && !has_timeline) {
GST_ERROR ("segment has neither duration nor timeline");
goto error;
}
*pointer = mult_seg_base_type;
return TRUE;
error:
gst_mpdparser_free_mult_seg_base_type_ext (mult_seg_base_type);
return FALSE;
}
static gboolean
gst_mpdparser_parse_segment_list_node (GstSegmentListNode ** pointer,
xmlNode * a_node, GstSegmentListNode * parent)
{
xmlNode *cur_node;
GstSegmentListNode *new_segment_list;
gchar *actuate;
gboolean segment_urls_inherited_from_parent = FALSE;
gst_mpdparser_free_segment_list_node (*pointer);
new_segment_list = g_slice_new0 (GstSegmentListNode);
/* Inherit attribute values from parent */
if (parent) {
GList *list;
GstSegmentURLNode *seg_url;
for (list = g_list_first (parent->SegmentURL); list;
list = g_list_next (list)) {
seg_url = (GstSegmentURLNode *) list->data;
new_segment_list->SegmentURL =
g_list_append (new_segment_list->SegmentURL,
gst_mpdparser_clone_segment_url (seg_url));
segment_urls_inherited_from_parent = TRUE;
}
}
new_segment_list->actuate = GST_XLINK_ACTUATE_ON_REQUEST;
if (gst_mpdparser_get_xml_ns_prop_string (a_node,
"http://www.w3.org/1999/xlink", "href", &new_segment_list->xlink_href)
&& gst_mpdparser_get_xml_ns_prop_string (a_node,
"http://www.w3.org/1999/xlink", "actuate", &actuate)) {
if (strcmp (actuate, "onLoad") == 0)
new_segment_list->actuate = GST_XLINK_ACTUATE_ON_LOAD;
xmlFree (actuate);
}
GST_LOG ("extension of SegmentList node:");
if (!gst_mpdparser_parse_mult_seg_base_type_ext
(&new_segment_list->MultSegBaseType, a_node,
(parent ? parent->MultSegBaseType : 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_mpdparser_free_segment_url_node);
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_mpdparser_free_segment_list_node (new_segment_list);
return FALSE;
}
static void
gst_mpdparser_parse_representation_base_type (GstRepresentationBaseType **
pointer, xmlNode * a_node)
{
xmlNode *cur_node;
GstRepresentationBaseType *representation_base;
gst_mpdparser_free_representation_base_type (*pointer);
*pointer = representation_base = g_slice_new0 (GstRepresentationBaseType);
GST_LOG ("attributes of RepresentationBaseType extension:");
gst_mpdparser_get_xml_prop_string (a_node, "profiles",
&representation_base->profiles);
gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "width", 0,
&representation_base->width);
gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "height", 0,
&representation_base->height);
gst_mpdparser_get_xml_prop_ratio (a_node, "sar", &representation_base->sar);
gst_mpdparser_get_xml_prop_framerate (a_node, "frameRate",
&representation_base->frameRate);
gst_mpdparser_get_xml_prop_string (a_node, "audioSamplingRate",
&representation_base->audioSamplingRate);
gst_mpdparser_get_xml_prop_string (a_node, "mimeType",
&representation_base->mimeType);
gst_mpdparser_get_xml_prop_string (a_node, "segmentProfiles",
&representation_base->segmentProfiles);
gst_mpdparser_get_xml_prop_string (a_node, "codecs",
&representation_base->codecs);
gst_mpdparser_get_xml_prop_double (a_node, "maximumSAPPeriod",
&representation_base->maximumSAPPeriod);
gst_mpdparser_get_xml_prop_SAP_type (a_node, "startWithSAP",
&representation_base->startWithSAP);
gst_mpdparser_get_xml_prop_double (a_node, "maxPlayoutRate",
&representation_base->maxPlayoutRate);
gst_mpdparser_get_xml_prop_boolean (a_node, "codingDependency",
FALSE, &representation_base->codingDependency);
gst_mpdparser_get_xml_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_node
(&representation_base->FramePacking, cur_node);
} else if (xmlStrcmp (cur_node->name,
(xmlChar *) "AudioChannelConfiguration") == 0) {
gst_mpdparser_parse_descriptor_type_node
(&representation_base->AudioChannelConfiguration, cur_node);
} else if (xmlStrcmp (cur_node->name,
(xmlChar *) "ContentProtection") == 0) {
gst_mpdparser_parse_descriptor_type_node
(&representation_base->ContentProtection, cur_node);
}
}
}
}
static gboolean
gst_mpdparser_parse_representation_node (GList ** list, xmlNode * a_node,
GstAdaptationSetNode * parent)
{
xmlNode *cur_node;
GstRepresentationNode *new_representation;
new_representation = g_slice_new0 (GstRepresentationNode);
GST_LOG ("attributes of Representation node:");
gst_mpdparser_get_xml_prop_string_no_whitespace (a_node, "id",
&new_representation->id);
gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "bandwidth", 0,
&new_representation->bandwidth);
gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "qualityRanking", 0,
&new_representation->qualityRanking);
gst_mpdparser_get_xml_prop_string_vector_type (a_node, "dependencyId",
&new_representation->dependencyId);
gst_mpdparser_get_xml_prop_string_vector_type (a_node,
"mediaStreamStructureId", &new_representation->mediaStreamStructureId);
/* RepresentationBase extension */
gst_mpdparser_parse_representation_base_type
(&new_representation->RepresentationBase, 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);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "SegmentTemplate") == 0) {
if (!gst_mpdparser_parse_segment_template_node
(&new_representation->SegmentTemplate, cur_node,
parent->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))
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_mpdparser_free_representation_node (new_representation);
return FALSE;
}
static gboolean
gst_mpdparser_parse_adaptation_set_node (GList ** list, xmlNode * a_node,
GstPeriodNode * parent)
{
xmlNode *cur_node;
GstAdaptationSetNode *new_adap_set;
gchar *actuate;
new_adap_set = g_slice_new0 (GstAdaptationSetNode);
GST_LOG ("attributes of AdaptationSet node:");
new_adap_set->actuate = GST_XLINK_ACTUATE_ON_REQUEST;
if (gst_mpdparser_get_xml_ns_prop_string (a_node,
"http://www.w3.org/1999/xlink", "href", &new_adap_set->xlink_href)
&& gst_mpdparser_get_xml_ns_prop_string (a_node,
"http://www.w3.org/1999/xlink", "actuate", &actuate)) {
if (strcmp (actuate, "onLoad") == 0)
new_adap_set->actuate = GST_XLINK_ACTUATE_ON_LOAD;
xmlFree (actuate);
}
gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "id", 0,
&new_adap_set->id);
gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "group", 0,
&new_adap_set->group);
gst_mpdparser_get_xml_prop_string (a_node, "lang", &new_adap_set->lang);
gst_mpdparser_get_xml_prop_string (a_node, "contentType",
&new_adap_set->contentType);
gst_mpdparser_get_xml_prop_ratio (a_node, "par", &new_adap_set->par);
gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "minBandwidth", 0,
&new_adap_set->minBandwidth);
gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "maxBandwidth", 0,
&new_adap_set->maxBandwidth);
gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "minWidth", 0,
&new_adap_set->minWidth);
gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "maxWidth", 0,
&new_adap_set->maxWidth);
gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "minHeight", 0,
&new_adap_set->minHeight);
gst_mpdparser_get_xml_prop_unsigned_integer (a_node, "maxHeight", 0,
&new_adap_set->maxHeight);
gst_mpdparser_get_xml_prop_framerate (a_node, "minFrameRate",
&new_adap_set->minFrameRate);
gst_mpdparser_get_xml_prop_framerate (a_node, "maxFrameRate",
&new_adap_set->maxFrameRate);
gst_mpdparser_get_xml_prop_cond_uint (a_node, "segmentAlignment",
&new_adap_set->segmentAlignment);
gst_mpdparser_get_xml_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_mpdparser_get_xml_prop_cond_uint (a_node, "subsegmentAlignment",
&new_adap_set->subsegmentAlignment);
gst_mpdparser_get_xml_prop_SAP_type (a_node, "subsegmentStartsWithSAP",
&new_adap_set->subsegmentStartsWithSAP);
/* RepresentationBase extension */
gst_mpdparser_parse_representation_base_type
(&new_adap_set->RepresentationBase, 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_node (&new_adap_set->Accessibility,
cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Role") == 0) {
gst_mpdparser_parse_descriptor_type_node (&new_adap_set->Role,
cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Rating") == 0) {
gst_mpdparser_parse_descriptor_type_node (&new_adap_set->Rating,
cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Viewpoint") == 0) {
gst_mpdparser_parse_descriptor_type_node (&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))
goto error;
}
}
}
*list = g_list_append (*list, new_adap_set);
return TRUE;
error:
gst_mpdparser_free_adaptation_set_node (new_adap_set);
return FALSE;
}
static void
gst_mpdparser_parse_subset_node (GList ** list, xmlNode * a_node)
{
GstSubsetNode *new_subset;
new_subset = g_slice_new0 (GstSubsetNode);
*list = g_list_append (*list, new_subset);
GST_LOG ("attributes of Subset node:");
gst_mpdparser_get_xml_prop_uint_vector_type (a_node, "contains",
&new_subset->contains, &new_subset->size);
}
static gboolean
gst_mpdparser_parse_segment_template_node (GstSegmentTemplateNode ** pointer,
xmlNode * a_node, GstSegmentTemplateNode * parent)
{
GstSegmentTemplateNode *new_segment_template;
gchar *strval;
gst_mpdparser_free_segment_template_node (*pointer);
new_segment_template = g_slice_new0 (GstSegmentTemplateNode);
GST_LOG ("extension of SegmentTemplate node:");
if (!gst_mpdparser_parse_mult_seg_base_type_ext
(&new_segment_template->MultSegBaseType, a_node,
(parent ? parent->MultSegBaseType : NULL)))
goto error;
/* Inherit attribute values from parent when the value isn't found */
GST_LOG ("attributes of SegmentTemplate node:");
if (gst_mpdparser_get_xml_prop_string (a_node, "media", &strval)) {
new_segment_template->media = strval;
} else if (parent) {
new_segment_template->media = xmlMemStrdup (parent->media);
}
if (gst_mpdparser_get_xml_prop_string (a_node, "index", &strval)) {
new_segment_template->index = strval;
} else if (parent) {
new_segment_template->index = xmlMemStrdup (parent->index);
}
if (gst_mpdparser_get_xml_prop_string (a_node, "initialization", &strval)) {
new_segment_template->initialization = strval;
} else if (parent) {
new_segment_template->initialization =
xmlMemStrdup (parent->initialization);
}
if (gst_mpdparser_get_xml_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_mpdparser_free_segment_template_node (new_segment_template);
return FALSE;
}
static gboolean
gst_mpdparser_parse_period_node (GList ** list, xmlNode * a_node)
{
xmlNode *cur_node;
GstPeriodNode *new_period;
gchar *actuate;
new_period = g_slice_new0 (GstPeriodNode);
GST_LOG ("attributes of Period node:");
new_period->actuate = GST_XLINK_ACTUATE_ON_REQUEST;
if (gst_mpdparser_get_xml_ns_prop_string (a_node,
"http://www.w3.org/1999/xlink", "href", &new_period->xlink_href)
&& gst_mpdparser_get_xml_ns_prop_string (a_node,
"http://www.w3.org/1999/xlink", "actuate", &actuate)) {
if (strcmp (actuate, "onLoad") == 0)
new_period->actuate = GST_XLINK_ACTUATE_ON_LOAD;
xmlFree (actuate);
}
gst_mpdparser_get_xml_prop_string (a_node, "id", &new_period->id);
gst_mpdparser_get_xml_prop_duration (a_node, "start", GST_MPD_DURATION_NONE,
&new_period->start);
gst_mpdparser_get_xml_prop_duration (a_node, "duration",
GST_MPD_DURATION_NONE, &new_period->duration);
gst_mpdparser_get_xml_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_mpdparser_free_period_node (new_period);
return FALSE;
}
static void
gst_mpdparser_parse_program_info_node (GList ** list, xmlNode * a_node)
{
xmlNode *cur_node;
GstProgramInformationNode *new_prog_info;
new_prog_info = g_slice_new0 (GstProgramInformationNode);
*list = g_list_append (*list, new_prog_info);
GST_LOG ("attributes of ProgramInformation node:");
gst_mpdparser_get_xml_prop_string (a_node, "lang", &new_prog_info->lang);
gst_mpdparser_get_xml_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_mpdparser_get_xml_node_content (cur_node, &new_prog_info->Title);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Source") == 0) {
gst_mpdparser_get_xml_node_content (cur_node, &new_prog_info->Source);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Copyright") == 0) {
gst_mpdparser_get_xml_node_content (cur_node,
&new_prog_info->Copyright);
}
}
}
}
static void
gst_mpdparser_parse_metrics_range_node (GList ** list, xmlNode * a_node)
{
GstMetricsRangeNode *new_metrics_range;
new_metrics_range = g_slice_new0 (GstMetricsRangeNode);
*list = g_list_append (*list, new_metrics_range);
GST_LOG ("attributes of Metrics Range node:");
gst_mpdparser_get_xml_prop_duration (a_node, "starttime",
GST_MPD_DURATION_NONE, &new_metrics_range->starttime);
gst_mpdparser_get_xml_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;
GstMetricsNode *new_metrics;
new_metrics = g_slice_new0 (GstMetricsNode);
*list = g_list_append (*list, new_metrics);
GST_LOG ("attributes of Metrics node:");
gst_mpdparser_get_xml_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)
{
GstUTCTimingNode *new_timing;
gchar *method = NULL;
gchar *value = NULL;
new_timing = g_slice_new0 (GstUTCTimingNode);
GST_LOG ("attributes of UTCTiming node:");
if (gst_mpdparser_get_xml_prop_string (a_node, "schemeIdUri", &method)) {
for (int i = 0; gst_mpdparser_utc_timing_methods[i].name; ++i) {
if (g_ascii_strncasecmp (gst_mpdparser_utc_timing_methods[i].name,
method, strlen (gst_mpdparser_utc_timing_methods[i].name)) == 0) {
new_timing->method = gst_mpdparser_utc_timing_methods[i].method;
break;
}
}
xmlFree (method);
}
if (gst_mpdparser_get_xml_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);
*list = g_list_append (*list, new_timing);
} else {
gst_mpdparser_free_utctiming_node (new_timing);
}
}
static gboolean
gst_mpdparser_parse_root_node (GstMPDNode ** pointer, xmlNode * a_node)
{
xmlNode *cur_node;
GstMPDNode *new_mpd;
gst_mpdparser_free_mpd_node (*pointer);
*pointer = NULL;
new_mpd = g_slice_new0 (GstMPDNode);
GST_LOG ("namespaces of root MPD node:");
new_mpd->default_namespace =
gst_mpdparser_get_xml_node_namespace (a_node, NULL);
new_mpd->namespace_xsi = gst_mpdparser_get_xml_node_namespace (a_node, "xsi");
new_mpd->namespace_ext = gst_mpdparser_get_xml_node_namespace (a_node, "ext");
GST_LOG ("attributes of root MPD node:");
gst_mpdparser_get_xml_prop_string (a_node, "schemaLocation",
&new_mpd->schemaLocation);
gst_mpdparser_get_xml_prop_string (a_node, "id", &new_mpd->id);
gst_mpdparser_get_xml_prop_string (a_node, "profiles", &new_mpd->profiles);
gst_mpdparser_get_xml_prop_type (a_node, "type", &new_mpd->type);
gst_mpdparser_get_xml_prop_dateTime (a_node, "availabilityStartTime",
&new_mpd->availabilityStartTime);
gst_mpdparser_get_xml_prop_dateTime (a_node, "availabilityEndTime",
&new_mpd->availabilityEndTime);
gst_mpdparser_get_xml_prop_duration (a_node, "mediaPresentationDuration",
GST_MPD_DURATION_NONE, &new_mpd->mediaPresentationDuration);
gst_mpdparser_get_xml_prop_duration (a_node, "minimumUpdatePeriod",
GST_MPD_DURATION_NONE, &new_mpd->minimumUpdatePeriod);
gst_mpdparser_get_xml_prop_duration (a_node, "minBufferTime",
GST_MPD_DURATION_NONE, &new_mpd->minBufferTime);
gst_mpdparser_get_xml_prop_duration (a_node, "timeShiftBufferDepth",
GST_MPD_DURATION_NONE, &new_mpd->timeShiftBufferDepth);
gst_mpdparser_get_xml_prop_duration (a_node, "suggestedPresentationDelay",
GST_MPD_DURATION_NONE, &new_mpd->suggestedPresentationDelay);
gst_mpdparser_get_xml_prop_duration (a_node, "maxSegmentDuration",
GST_MPD_DURATION_NONE, &new_mpd->maxSegmentDuration);
gst_mpdparser_get_xml_prop_duration (a_node, "maxSubsegmentDuration",
GST_MPD_DURATION_NONE, &new_mpd->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->Periods, cur_node))
goto error;
} else if (xmlStrcmp (cur_node->name,
(xmlChar *) "ProgramInformation") == 0) {
gst_mpdparser_parse_program_info_node (&new_mpd->ProgramInfo, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "BaseURL") == 0) {
gst_mpdparser_parse_baseURL_node (&new_mpd->BaseURLs, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Location") == 0) {
gst_mpdparser_parse_location_node (&new_mpd->Locations, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "Metrics") == 0) {
gst_mpdparser_parse_metrics_node (&new_mpd->Metrics, cur_node);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "UTCTiming") == 0) {
gst_mpdparser_parse_utctiming_node (&new_mpd->UTCTiming, cur_node);
}
}
}
gst_mpdparser_free_mpd_node (*pointer);
*pointer = new_mpd;
return TRUE;
error:
gst_mpdparser_free_mpd_node (new_mpd);
return FALSE;
}
/* comparison functions */
static int
strncmp_ext (const char *s1, const char *s2)
{
if (s1 == NULL && s2 == NULL)
return 0;
if (s1 == NULL && s2 != NULL)
return 1;
if (s2 == NULL && s1 != NULL)
return 1;
return strncmp (s1, s2, strlen (s2));
}
/* navigation functions */
static GstStreamMimeType
gst_mpdparser_representation_get_mimetype (GstAdaptationSetNode * adapt_set,
GstRepresentationNode * rep)
{
gchar *mime = NULL;
if (rep->RepresentationBase)
mime = rep->RepresentationBase->mimeType;
if (mime == NULL && adapt_set->RepresentationBase) {
mime = adapt_set->RepresentationBase->mimeType;
}
if (strncmp_ext (mime, "audio") == 0)
return GST_STREAM_AUDIO;
if (strncmp_ext (mime, "video") == 0)
return GST_STREAM_VIDEO;
if (strncmp_ext (mime, "application") == 0)
return GST_STREAM_APPLICATION;
return GST_STREAM_UNKNOWN;
}
static GstRepresentationNode *
gst_mpdparser_get_lowest_representation (GList * Representations)
{
GList *list = NULL;
GstRepresentationNode *rep = NULL;
GstRepresentationNode *lowest = NULL;
if (Representations == NULL)
return NULL;
for (list = g_list_first (Representations); list; list = g_list_next (list)) {
rep = (GstRepresentationNode *) list->data;
if (rep && (!lowest || rep->bandwidth < lowest->bandwidth)) {
lowest = rep;
}
}
return lowest;
}
#if 0
static GstRepresentationNode *
gst_mpdparser_get_highest_representation (GList * Representations)
{
GList *list = NULL;
if (Representations == NULL)
return NULL;
list = g_list_last (Representations);
return list ? (GstRepresentationNode *) list->data : NULL;
}
static GstRepresentationNode *
gst_mpdparser_get_representation_with_max_bandwidth (GList * Representations,
gint max_bandwidth)
{
GList *list = NULL;
GstRepresentationNode *representation, *best_rep = NULL;
if (Representations == NULL)
return NULL;
if (max_bandwidth <= 0) /* 0 => get highest representation available */
return gst_mpdparser_get_highest_representation (Representations);
for (list = g_list_first (Representations); list; list = g_list_next (list)) {
representation = (GstRepresentationNode *) list->data;
if (representation && representation->bandwidth <= max_bandwidth) {
best_rep = representation;
}
}
return best_rep;
}
#endif
static GstSegmentBaseType *
gst_mpdparser_get_segment_base (GstPeriodNode * Period,
GstAdaptationSetNode * AdaptationSet,
GstRepresentationNode * Representation)
{
GstSegmentBaseType *SegmentBase = NULL;
if (Representation && Representation->SegmentBase) {
SegmentBase = Representation->SegmentBase;
} else if (AdaptationSet && AdaptationSet->SegmentBase) {
SegmentBase = AdaptationSet->SegmentBase;
} else if (Period && Period->SegmentBase) {
SegmentBase = Period->SegmentBase;
}
/* the SegmentBase element could be encoded also inside a SegmentList element */
if (SegmentBase == NULL) {
if (Representation && Representation->SegmentList
&& Representation->SegmentList->MultSegBaseType
&& Representation->SegmentList->MultSegBaseType->SegBaseType) {
SegmentBase = Representation->SegmentList->MultSegBaseType->SegBaseType;
} else if (AdaptationSet && AdaptationSet->SegmentList
&& AdaptationSet->SegmentList->MultSegBaseType
&& AdaptationSet->SegmentList->MultSegBaseType->SegBaseType) {
SegmentBase = AdaptationSet->SegmentList->MultSegBaseType->SegBaseType;
} else if (Period && Period->SegmentList
&& Period->SegmentList->MultSegBaseType
&& Period->SegmentList->MultSegBaseType->SegBaseType) {
SegmentBase = Period->SegmentList->MultSegBaseType->SegBaseType;
}
}
return SegmentBase;
}
gint
gst_mpdparser_get_rep_idx_with_min_bandwidth (GList * Representations)
{
GList *list = NULL, *lowest = NULL;
GstRepresentationNode *rep = NULL;
gint lowest_bandwidth = -1;
if (Representations == NULL)
return -1;
for (list = g_list_first (Representations); list; list = g_list_next (list)) {
rep = (GstRepresentationNode *) list->data;
if (rep && (!lowest || rep->bandwidth < lowest_bandwidth)) {
lowest = list;
lowest_bandwidth = rep->bandwidth;
}
}
return lowest ? g_list_position (Representations, lowest) : -1;
}
gint
gst_mpdparser_get_rep_idx_with_max_bandwidth (GList * Representations,
gint max_bandwidth)
{
GList *list = NULL, *best = NULL;
GstRepresentationNode *representation;
gint best_bandwidth = 0;
GST_DEBUG ("max_bandwidth = %i", max_bandwidth);
if (Representations == NULL)
return -1;
if (max_bandwidth <= 0) /* 0 => get lowest representation available */
return gst_mpdparser_get_rep_idx_with_min_bandwidth (Representations);
for (list = g_list_first (Representations); list; list = g_list_next (list)) {
representation = (GstRepresentationNode *) list->data;
if (representation && representation->bandwidth <= max_bandwidth &&
representation->bandwidth > best_bandwidth) {
best = list;
best_bandwidth = representation->bandwidth;
}
}
return best ? g_list_position (Representations, best) : -1;
}
static GstSegmentListNode *
gst_mpd_client_fetch_external_segment_list (GstMpdClient * client,
GstPeriodNode * Period,
GstAdaptationSetNode * AdaptationSet,
GstRepresentationNode * Representation,
GstSegmentListNode * parent, GstSegmentListNode * segment_list,
gboolean * error)
{
GstFragment *download;
GstBuffer *segment_list_buffer;
GstMapInfo map;
GError *err = NULL;
xmlDocPtr doc;
GstUri *base_uri, *uri;
gchar *query = NULL;
gchar *uri_string;
GstSegmentListNode *new_segment_list = NULL;
*error = FALSE;
/* ISO/IEC 23009-1:2014 5.5.3 4)
* Remove nodes that resolve to nothing when resolving
*/
if (strcmp (segment_list->xlink_href,
"urn:mpeg:dash:resolve-to-zero:2013") == 0) {
return NULL;
}
if (!client->downloader) {
*error = TRUE;
return NULL;
}
/* Build absolute URI */
/* Get base URI at the MPD level */
base_uri =
gst_uri_from_string (client->
mpd_base_uri ? client->mpd_base_uri : client->mpd_uri);
/* combine a BaseURL at the MPD level with the current base url */
base_uri = combine_urls (base_uri, client->mpd_node->BaseURLs, &query, 0);
/* combine a BaseURL at the Period level with the current base url */
base_uri = combine_urls (base_uri, Period->BaseURLs, &query, 0);
if (AdaptationSet) {
/* combine a BaseURL at the AdaptationSet level with the current base url */
base_uri = combine_urls (base_uri, AdaptationSet->BaseURLs, &query, 0);
if (Representation) {
/* combine a BaseURL at the Representation level with the current base url */
base_uri = combine_urls (base_uri, Representation->BaseURLs, &query, 0);
}
}
uri = gst_uri_from_string_with_base (base_uri, segment_list->xlink_href);
if (query)
gst_uri_set_query_string (uri, query);
g_free (query);
uri_string = gst_uri_to_string (uri);
gst_uri_unref (base_uri);
gst_uri_unref (uri);
download =
gst_uri_downloader_fetch_uri (client->downloader,
uri_string, client->mpd_uri, TRUE, FALSE, TRUE, &err);
g_free (uri_string);
if (!download) {
GST_ERROR ("Failed to download external SegmentList node at '%s': %s",
segment_list->xlink_href, err->message);
g_clear_error (&err);
*error = TRUE;
return NULL;
}
segment_list_buffer = gst_fragment_get_buffer (download);
g_object_unref (download);
gst_buffer_map (segment_list_buffer, &map, GST_MAP_READ);
doc =
xmlReadMemory ((const gchar *) map.data, map.size, "noname.xml", NULL,
XML_PARSE_NONET);
if (doc) {
xmlNode *root_element = xmlDocGetRootElement (doc);
if (root_element->type != XML_ELEMENT_NODE ||
xmlStrcmp (root_element->name, (xmlChar *) "SegmentList") != 0) {
xmlFreeDoc (doc);
gst_buffer_unmap (segment_list_buffer, &map);
gst_buffer_unref (segment_list_buffer);
*error = TRUE;
return NULL;
}
gst_mpdparser_parse_segment_list_node (&new_segment_list, root_element,
parent);
} else {
GST_ERROR ("Failed to parse adaptation set node XML");
gst_buffer_unmap (segment_list_buffer, &map);
gst_buffer_unref (segment_list_buffer);
*error = TRUE;
return NULL;
}
gst_buffer_unmap (segment_list_buffer, &map);
gst_buffer_unref (segment_list_buffer);
return new_segment_list;
}
static GstSegmentListNode *
gst_mpdparser_get_segment_list (GstMpdClient * client, GstPeriodNode * Period,
GstAdaptationSetNode * AdaptationSet,
GstRepresentationNode * Representation)
{
GstSegmentListNode **SegmentList;
GstSegmentListNode *ParentSegmentList = NULL;
if (Representation && Representation->SegmentList) {
SegmentList = &Representation->SegmentList;
ParentSegmentList = AdaptationSet->SegmentList;
} else if (AdaptationSet && AdaptationSet->SegmentList) {
SegmentList = &AdaptationSet->SegmentList;
ParentSegmentList = Period->SegmentList;
Representation = NULL;
} else {
Representation = NULL;
AdaptationSet = NULL;
SegmentList = &Period->SegmentList;
}
/* Resolve external segment list here. */
if (*SegmentList && (*SegmentList)->xlink_href) {
GstSegmentListNode *new_segment_list;
gboolean error;
new_segment_list =
gst_mpd_client_fetch_external_segment_list (client, Period,
AdaptationSet, Representation, ParentSegmentList, *SegmentList, &error);
gst_mpdparser_free_segment_list_node (*SegmentList);
*SegmentList = new_segment_list;
}
return *SegmentList;
}
/* memory management functions */
static void
gst_mpdparser_free_mpd_node (GstMPDNode * mpd_node)
{
if (mpd_node) {
if (mpd_node->default_namespace)
xmlFree (mpd_node->default_namespace);
if (mpd_node->namespace_xsi)
xmlFree (mpd_node->namespace_xsi);
if (mpd_node->namespace_ext)
xmlFree (mpd_node->namespace_ext);
if (mpd_node->schemaLocation)
xmlFree (mpd_node->schemaLocation);
if (mpd_node->id)
xmlFree (mpd_node->id);
if (mpd_node->profiles)
xmlFree (mpd_node->profiles);
if (mpd_node->availabilityStartTime)
gst_date_time_unref (mpd_node->availabilityStartTime);
if (mpd_node->availabilityEndTime)
gst_date_time_unref (mpd_node->availabilityEndTime);
g_list_free_full (mpd_node->ProgramInfo,
(GDestroyNotify) gst_mpdparser_free_prog_info_node);
g_list_free_full (mpd_node->BaseURLs,
(GDestroyNotify) gst_mpdparser_free_base_url_node);
g_list_free_full (mpd_node->Locations, (GDestroyNotify) xmlFree);
g_list_free_full (mpd_node->Periods,
(GDestroyNotify) gst_mpdparser_free_period_node);
g_list_free_full (mpd_node->Metrics,
(GDestroyNotify) gst_mpdparser_free_metrics_node);
g_list_free_full (mpd_node->UTCTiming,
(GDestroyNotify) gst_mpdparser_free_utctiming_node);
g_slice_free (GstMPDNode, mpd_node);
}
}
static void
gst_mpdparser_free_prog_info_node (GstProgramInformationNode * prog_info_node)
{
if (prog_info_node) {
if (prog_info_node->lang)
xmlFree (prog_info_node->lang);
if (prog_info_node->moreInformationURL)
xmlFree (prog_info_node->moreInformationURL);
if (prog_info_node->Title)
xmlFree (prog_info_node->Title);
if (prog_info_node->Source)
xmlFree (prog_info_node->Source);
if (prog_info_node->Copyright)
xmlFree (prog_info_node->Copyright);
g_slice_free (GstProgramInformationNode, prog_info_node);
}
}
static void
gst_mpdparser_free_metrics_node (GstMetricsNode * metrics_node)
{
if (metrics_node) {
if (metrics_node->metrics)
xmlFree (metrics_node->metrics);
g_list_free_full (metrics_node->MetricsRanges,
(GDestroyNotify) gst_mpdparser_free_metrics_range_node);
g_slice_free (GstMetricsNode, metrics_node);
}
}
static void
gst_mpdparser_free_metrics_range_node (GstMetricsRangeNode * metrics_range_node)
{
if (metrics_range_node) {
g_slice_free (GstMetricsRangeNode, metrics_range_node);
}
}
static void
gst_mpdparser_free_period_node (GstPeriodNode * period_node)
{
if (period_node) {
if (period_node->id)
xmlFree (period_node->id);
gst_mpdparser_free_seg_base_type_ext (period_node->SegmentBase);
gst_mpdparser_free_segment_list_node (period_node->SegmentList);
gst_mpdparser_free_segment_template_node (period_node->SegmentTemplate);
g_list_free_full (period_node->AdaptationSets,
(GDestroyNotify) gst_mpdparser_free_adaptation_set_node);
g_list_free_full (period_node->Subsets,
(GDestroyNotify) gst_mpdparser_free_subset_node);
g_list_free_full (period_node->BaseURLs,
(GDestroyNotify) gst_mpdparser_free_base_url_node);
if (period_node->xlink_href)
xmlFree (period_node->xlink_href);
g_slice_free (GstPeriodNode, period_node);
}
}
static void
gst_mpdparser_free_subset_node (GstSubsetNode * subset_node)
{
if (subset_node) {
if (subset_node->contains)
xmlFree (subset_node->contains);
g_slice_free (GstSubsetNode, subset_node);
}
}
static void
gst_mpdparser_free_segment_template_node (GstSegmentTemplateNode *
segment_template_node)
{
if (segment_template_node) {
if (segment_template_node->media)
xmlFree (segment_template_node->media);
if (segment_template_node->index)
xmlFree (segment_template_node->index);
if (segment_template_node->initialization)
xmlFree (segment_template_node->initialization);
if (segment_template_node->bitstreamSwitching)
xmlFree (segment_template_node->bitstreamSwitching);
/* MultipleSegmentBaseType extension */
gst_mpdparser_free_mult_seg_base_type_ext
(segment_template_node->MultSegBaseType);
g_slice_free (GstSegmentTemplateNode, segment_template_node);
}
}
static void
gst_mpdparser_free_representation_base_type (GstRepresentationBaseType *
representation_base)
{
if (representation_base) {
if (representation_base->profiles)
xmlFree (representation_base->profiles);
g_slice_free (GstRatio, representation_base->sar);
g_slice_free (GstFrameRate, representation_base->frameRate);
if (representation_base->audioSamplingRate)
xmlFree (representation_base->audioSamplingRate);
if (representation_base->mimeType)
xmlFree (representation_base->mimeType);
if (representation_base->segmentProfiles)
xmlFree (representation_base->segmentProfiles);
if (representation_base->codecs)
xmlFree (representation_base->codecs);
if (representation_base->scanType)
xmlFree (representation_base->scanType);
g_list_free_full (representation_base->FramePacking,
(GDestroyNotify) gst_mpdparser_free_descriptor_type_node);
g_list_free_full (representation_base->AudioChannelConfiguration,
(GDestroyNotify) gst_mpdparser_free_descriptor_type_node);
g_list_free_full (representation_base->ContentProtection,
(GDestroyNotify) gst_mpdparser_free_descriptor_type_node);
g_slice_free (GstRepresentationBaseType, representation_base);
}
}
static void
gst_mpdparser_free_adaptation_set_node (GstAdaptationSetNode *
adaptation_set_node)
{
if (adaptation_set_node) {
if (adaptation_set_node->lang)
xmlFree (adaptation_set_node->lang);
if (adaptation_set_node->contentType)
xmlFree (adaptation_set_node->contentType);
g_slice_free (GstRatio, adaptation_set_node->par);
g_slice_free (GstFrameRate, adaptation_set_node->minFrameRate);
g_slice_free (GstFrameRate, adaptation_set_node->maxFrameRate);
g_slice_free (GstConditionalUintType,
adaptation_set_node->segmentAlignment);
g_slice_free (GstConditionalUintType,
adaptation_set_node->subsegmentAlignment);
g_list_free_full (adaptation_set_node->Accessibility,
(GDestroyNotify) gst_mpdparser_free_descriptor_type_node);
g_list_free_full (adaptation_set_node->Role,
(GDestroyNotify) gst_mpdparser_free_descriptor_type_node);
g_list_free_full (adaptation_set_node->Rating,
(GDestroyNotify) gst_mpdparser_free_descriptor_type_node);
g_list_free_full (adaptation_set_node->Viewpoint,
(GDestroyNotify) gst_mpdparser_free_descriptor_type_node);
gst_mpdparser_free_representation_base_type
(adaptation_set_node->RepresentationBase);
gst_mpdparser_free_seg_base_type_ext (adaptation_set_node->SegmentBase);
gst_mpdparser_free_segment_list_node (adaptation_set_node->SegmentList);
gst_mpdparser_free_segment_template_node
(adaptation_set_node->SegmentTemplate);
g_list_free_full (adaptation_set_node->BaseURLs,
(GDestroyNotify) gst_mpdparser_free_base_url_node);
g_list_free_full (adaptation_set_node->Representations,
(GDestroyNotify) gst_mpdparser_free_representation_node);
g_list_free_full (adaptation_set_node->ContentComponents,
(GDestroyNotify) gst_mpdparser_free_content_component_node);
if (adaptation_set_node->xlink_href)
xmlFree (adaptation_set_node->xlink_href);
g_slice_free (GstAdaptationSetNode, adaptation_set_node);
}
}
static void
gst_mpdparser_free_representation_node (GstRepresentationNode *
representation_node)
{
if (representation_node) {
if (representation_node->id)
xmlFree (representation_node->id);
g_strfreev (representation_node->dependencyId);
g_strfreev (representation_node->mediaStreamStructureId);
gst_mpdparser_free_representation_base_type
(representation_node->RepresentationBase);
g_list_free_full (representation_node->SubRepresentations,
(GDestroyNotify) gst_mpdparser_free_subrepresentation_node);
gst_mpdparser_free_seg_base_type_ext (representation_node->SegmentBase);
gst_mpdparser_free_segment_template_node
(representation_node->SegmentTemplate);
gst_mpdparser_free_segment_list_node (representation_node->SegmentList);
g_list_free_full (representation_node->BaseURLs,
(GDestroyNotify) gst_mpdparser_free_base_url_node);
g_slice_free (GstRepresentationNode, representation_node);
}
}
static void
gst_mpdparser_free_subrepresentation_node (GstSubRepresentationNode *
subrep_node)
{
if (subrep_node) {
gst_mpdparser_free_representation_base_type
(subrep_node->RepresentationBase);
if (subrep_node->dependencyLevel)
xmlFree (subrep_node->dependencyLevel);
g_strfreev (subrep_node->contentComponent);
g_slice_free (GstSubRepresentationNode, subrep_node);
}
}
static void
gst_mpdparser_free_s_node (GstSNode * s_node)
{
if (s_node) {
g_slice_free (GstSNode, s_node);
}
}
static GstSegmentTimelineNode *
gst_mpdparser_segment_timeline_node_new (void)
{
GstSegmentTimelineNode *node = g_slice_new0 (GstSegmentTimelineNode);
g_queue_init (&node->S);
return node;
}
static void
gst_mpdparser_free_segment_timeline_node (GstSegmentTimelineNode * seg_timeline)
{
if (seg_timeline) {
g_queue_foreach (&seg_timeline->S, (GFunc) gst_mpdparser_free_s_node, NULL);
g_queue_clear (&seg_timeline->S);
g_slice_free (GstSegmentTimelineNode, seg_timeline);
}
}
static void
gst_mpdparser_free_url_type_node (GstURLType * url_type_node)
{
if (url_type_node) {
if (url_type_node->sourceURL)
xmlFree (url_type_node->sourceURL);
g_slice_free (GstRange, url_type_node->range);
g_slice_free (GstURLType, url_type_node);
}
}
static void
gst_mpdparser_free_seg_base_type_ext (GstSegmentBaseType * seg_base_type)
{
if (seg_base_type) {
if (seg_base_type->indexRange)
g_slice_free (GstRange, seg_base_type->indexRange);
gst_mpdparser_free_url_type_node (seg_base_type->Initialization);
gst_mpdparser_free_url_type_node (seg_base_type->RepresentationIndex);
g_slice_free (GstSegmentBaseType, seg_base_type);
}
}
static void
gst_mpdparser_free_mult_seg_base_type_ext (GstMultSegmentBaseType *
mult_seg_base_type)
{
if (mult_seg_base_type) {
/* SegmentBaseType extension */
gst_mpdparser_free_seg_base_type_ext (mult_seg_base_type->SegBaseType);
gst_mpdparser_free_segment_timeline_node
(mult_seg_base_type->SegmentTimeline);
gst_mpdparser_free_url_type_node (mult_seg_base_type->BitstreamSwitching);
g_slice_free (GstMultSegmentBaseType, mult_seg_base_type);
}
}
static void
gst_mpdparser_free_segment_list_node (GstSegmentListNode * segment_list_node)
{
if (segment_list_node) {
g_list_free_full (segment_list_node->SegmentURL,
(GDestroyNotify) gst_mpdparser_free_segment_url_node);
/* MultipleSegmentBaseType extension */
gst_mpdparser_free_mult_seg_base_type_ext
(segment_list_node->MultSegBaseType);
if (segment_list_node->xlink_href)
xmlFree (segment_list_node->xlink_href);
g_slice_free (GstSegmentListNode, segment_list_node);
}
}
static void
gst_mpdparser_free_segment_url_node (GstSegmentURLNode * segment_url)
{
if (segment_url) {
if (segment_url->media)
xmlFree (segment_url->media);
g_slice_free (GstRange, segment_url->mediaRange);
if (segment_url->index)
xmlFree (segment_url->index);
g_slice_free (GstRange, segment_url->indexRange);
g_slice_free (GstSegmentURLNode, segment_url);
}
}
static void
gst_mpdparser_free_base_url_node (GstBaseURL * base_url_node)
{
if (base_url_node) {
if (base_url_node->baseURL)
xmlFree (base_url_node->baseURL);
if (base_url_node->serviceLocation)
xmlFree (base_url_node->serviceLocation);
if (base_url_node->byteRange)
xmlFree (base_url_node->byteRange);
g_slice_free (GstBaseURL, base_url_node);
}
}
static void
gst_mpdparser_free_descriptor_type_node (GstDescriptorType * descriptor_type)
{
if (descriptor_type) {
if (descriptor_type->schemeIdUri)
xmlFree (descriptor_type->schemeIdUri);
if (descriptor_type->value)
xmlFree (descriptor_type->value);
g_slice_free (GstDescriptorType, descriptor_type);
}
}
static void
gst_mpdparser_free_content_component_node (GstContentComponentNode *
content_component_node)
{
if (content_component_node) {
if (content_component_node->lang)
xmlFree (content_component_node->lang);
if (content_component_node->contentType)
xmlFree (content_component_node->contentType);
g_slice_free (GstRatio, content_component_node->par);
g_list_free_full (content_component_node->Accessibility,
(GDestroyNotify) gst_mpdparser_free_descriptor_type_node);
g_list_free_full (content_component_node->Role,
(GDestroyNotify) gst_mpdparser_free_descriptor_type_node);
g_list_free_full (content_component_node->Rating,
(GDestroyNotify) gst_mpdparser_free_descriptor_type_node);
g_list_free_full (content_component_node->Viewpoint,
(GDestroyNotify) gst_mpdparser_free_descriptor_type_node);
g_slice_free (GstContentComponentNode, content_component_node);
}
}
static void
gst_mpdparser_free_utctiming_node (GstUTCTimingNode * timing_type)
{
if (timing_type) {
if (timing_type->urls)
g_strfreev (timing_type->urls);
g_slice_free (GstUTCTimingNode, timing_type);
}
}
static void
gst_mpdparser_free_stream_period (GstStreamPeriod * stream_period)
{
if (stream_period) {
g_slice_free (GstStreamPeriod, stream_period);
}
}
static void
gst_mpdparser_free_media_segment (GstMediaSegment * media_segment)
{
if (media_segment) {
g_slice_free (GstMediaSegment, media_segment);
}
}
static 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);
}
static 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_slice_free (GstActiveStream, active_stream);
}
}
static gchar *
gst_mpdparser_get_mediaURL (GstActiveStream * stream,
GstSegmentURLNode * segmentURL)
{
const gchar *url_prefix;
g_return_val_if_fail (stream != NULL, NULL);
g_return_val_if_fail (segmentURL != NULL, NULL);
url_prefix = segmentURL->media ? segmentURL->media : stream->baseURL;
g_return_val_if_fail (url_prefix != NULL, NULL);
return segmentURL->media;
}
static const gchar *
gst_mpdparser_get_initializationURL (GstActiveStream * stream,
GstURLType * InitializationURL)
{
const gchar *url_prefix;
g_return_val_if_fail (stream != NULL, NULL);
url_prefix = (InitializationURL
&& InitializationURL->sourceURL) ? InitializationURL->
sourceURL : stream->baseURL;
return url_prefix;
}
/* 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$-_.+!*'(),%",
*s))
return FALSE;
if (*s == '%') {
/* g_ascii_isdigit returns FALSE for NUL, and || is a short circuiting
operator, so this is safe for strings ending before two hex digits */
if (!g_ascii_isxdigit (s[1]) || !g_ascii_isxdigit (s[2]))
return FALSE;
s += 2;
}
s++;
}
return TRUE;
}
static gchar *
gst_mpdparser_build_URL_from_template (const gchar * url_template,
const gchar * id, guint number, guint bandwidth, guint64 time)
{
static const gchar default_format[] = "%01d";
gchar **tokens, *token, *ret;
const gchar *format;
gint i, num_tokens;
g_return_val_if_fail (url_template != NULL, NULL);
tokens = g_strsplit_set (url_template, "$", -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)) {
GST_WARNING ("String '%s' has characters invalid in an RFC 1738 URL",
id);
goto invalid_format;
}
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;
}
}
guint
gst_mpd_client_get_period_index_at_time (GstMpdClient * client,
GstDateTime * time)
{
GList *iter;
guint period_idx = G_MAXUINT;
guint idx;
gint64 time_offset;
GstDateTime *avail_start =
gst_mpd_client_get_availability_start_time (client);
GstStreamPeriod *stream_period;
if (avail_start == NULL)
return 0;
time_offset = gst_mpd_client_calculate_time_difference (avail_start, time);
gst_date_time_unref (avail_start);
if (time_offset < 0)
return 0;
if (!gst_mpd_client_setup_media_presentation (client, time_offset, -1, NULL))
return 0;
for (idx = 0, iter = client->periods; iter; idx++, iter = g_list_next (iter)) {
stream_period = iter->data;
if (stream_period->start <= time_offset
&& stream_period->start + stream_period->duration > time_offset) {
period_idx = idx;
break;
}
}
return period_idx;
}
static GstStreamPeriod *
gst_mpdparser_get_stream_period (GstMpdClient * client)
{
g_return_val_if_fail (client != NULL, NULL);
g_return_val_if_fail (client->periods != NULL, NULL);
return g_list_nth_data (client->periods, client->period_idx);
}
static GstRange *
gst_mpdparser_clone_range (GstRange * range)
{
GstRange *clone = NULL;
if (range) {
clone = g_slice_new0 (GstRange);
clone->first_byte_pos = range->first_byte_pos;
clone->last_byte_pos = range->last_byte_pos;
}
return clone;
}
static GstURLType *
gst_mpdparser_clone_URL (GstURLType * url)
{
GstURLType *clone = NULL;
if (url) {
clone = g_slice_new0 (GstURLType);
if (url->sourceURL) {
clone->sourceURL = xmlMemStrdup (url->sourceURL);
}
clone->range = gst_mpdparser_clone_range (url->range);
}
return clone;
}
/*
* Combine a base url with the current stream base url from the list of
* baseURLs. Takes ownership of base and returns a new base.
*/
static GstUri *
combine_urls (GstUri * base, GList * list, gchar ** query, guint idx)
{
GstBaseURL *baseURL;
GstUri *ret = base;
if (list != NULL) {
baseURL = g_list_nth_data (list, idx);
if (!baseURL) {
baseURL = list->data;
}
ret = gst_uri_from_string_with_base (base, baseURL->baseURL);
gst_uri_unref (base);
if (ret && query) {
if (*query)
g_free (*query);
*query = gst_uri_get_query_string (ret);
if (*query) {
ret = gst_uri_make_writable (ret);
gst_uri_set_query_table (ret, NULL);
}
}
}
return ret;
}
/* select a stream and extract the baseURL (if present) */
static gchar *
gst_mpdparser_parse_baseURL (GstMpdClient * client, GstActiveStream * stream,
gchar ** query)
{
GstStreamPeriod *stream_period;
static const gchar empty[] = "";
gchar *ret = NULL;
GstUri *abs_url;
g_return_val_if_fail (stream != NULL, g_strdup (empty));
stream_period = gst_mpdparser_get_stream_period (client);
g_return_val_if_fail (stream_period != NULL, g_strdup (empty));
g_return_val_if_fail (stream_period->period != NULL, g_strdup (empty));
/* NULLify query return before we start */
if (query)
*query = NULL;
/* initialise base url */
abs_url =
gst_uri_from_string (client->
mpd_base_uri ? client->mpd_base_uri : client->mpd_uri);
/* combine a BaseURL at the MPD level with the current base url */
abs_url =
combine_urls (abs_url, client->mpd_node->BaseURLs, query,
stream->baseURL_idx);
/* combine a BaseURL at the Period level with the current base url */
abs_url =
combine_urls (abs_url, stream_period->period->BaseURLs, query,
stream->baseURL_idx);
GST_DEBUG ("Current adaptation set id %i (%s)", stream->cur_adapt_set->id,
stream->cur_adapt_set->contentType);
/* combine a BaseURL at the AdaptationSet level with the current base url */
abs_url =
combine_urls (abs_url, stream->cur_adapt_set->BaseURLs, query,
stream->baseURL_idx);
/* combine a BaseURL at the Representation level with the current base url */
abs_url =
combine_urls (abs_url, stream->cur_representation->BaseURLs, query,
stream->baseURL_idx);
ret = gst_uri_to_string (abs_url);
gst_uri_unref (abs_url);
return ret;
}
static GstClockTime
gst_mpd_client_get_segment_duration (GstMpdClient * client,
GstActiveStream * stream, guint64 * scale_dur)
{
GstStreamPeriod *stream_period;
GstMultSegmentBaseType *base = NULL;
GstClockTime duration = 0;
g_return_val_if_fail (stream != NULL, GST_CLOCK_TIME_NONE);
stream_period = gst_mpdparser_get_stream_period (client);
g_return_val_if_fail (stream_period != NULL, GST_CLOCK_TIME_NONE);
if (stream->cur_segment_list) {
base = stream->cur_segment_list->MultSegBaseType;
} else if (stream->cur_seg_template) {
base = stream->cur_seg_template->MultSegBaseType;
}
if (base == NULL || base->SegBaseType == NULL) {
/* this may happen when we have a single segment */
duration = stream_period->duration;
if (scale_dur)
*scale_dur = duration;
} else {
/* duration is guint so this cannot overflow */
duration = base->duration * GST_SECOND;
if (scale_dur)
*scale_dur = duration;
duration /= base->SegBaseType->timescale;
}
return duration;
}
/*****************************/
/******* API functions *******/
/*****************************/
GstMpdClient *
gst_mpd_client_new (void)
{
GstMpdClient *client;
client = g_new0 (GstMpdClient, 1);
return client;
}
void
gst_active_streams_free (GstMpdClient * client)
{
if (client->active_streams) {
g_list_foreach (client->active_streams,
(GFunc) gst_mpdparser_free_active_stream, NULL);
g_list_free (client->active_streams);
client->active_streams = NULL;
}
}
void
gst_mpd_client_free (GstMpdClient * client)
{
g_return_if_fail (client != NULL);
if (client->mpd_node)
gst_mpdparser_free_mpd_node (client->mpd_node);
if (client->periods) {
g_list_free_full (client->periods,
(GDestroyNotify) gst_mpdparser_free_stream_period);
}
gst_active_streams_free (client);
g_free (client->mpd_uri);
client->mpd_uri = NULL;
g_free (client->mpd_base_uri);
client->mpd_base_uri = NULL;
if (client->downloader)
gst_object_unref (client->downloader);
client->downloader = NULL;
g_free (client);
}
void
gst_mpd_client_set_uri_downloader (GstMpdClient * client,
GstUriDownloader * downloader)
{
if (client->downloader)
gst_object_unref (client->downloader);
client->downloader = gst_object_ref (downloader);
}
static void
gst_mpd_client_check_profiles (GstMpdClient * client)
{
GST_DEBUG ("Profiles: %s",
client->mpd_node->profiles ? client->mpd_node->profiles : "<none>");
if (!client->mpd_node->profiles)
return;
if (g_strstr_len (client->mpd_node->profiles, -1,
"urn:mpeg:dash:profile:isoff-on-demand:2011")) {
client->profile_isoff_ondemand = TRUE;
GST_DEBUG ("Found ISOFF on demand profile (2011)");
}
}
static gboolean
gst_mpd_client_fetch_on_load_external_resources (GstMpdClient * client)
{
GList *l;
for (l = client->mpd_node->Periods; l; /* explicitly advanced below */ ) {
GstPeriodNode *period = l->data;
GList *m;
if (period->xlink_href && period->actuate == GST_XLINK_ACTUATE_ON_LOAD) {
GList *new_periods, *prev, *next;
gboolean error;
new_periods =
gst_mpd_client_fetch_external_period (client, period, &error);
if (!new_periods && error)
goto syntax_error;
prev = l->prev;
client->mpd_node->Periods =
g_list_delete_link (client->mpd_node->Periods, l);
gst_mpdparser_free_period_node (period);
period = NULL;
/* Get new next node, we will insert before this */
if (prev)
next = prev->next;
else
next = client->mpd_node->Periods;
while (new_periods) {
client->mpd_node->Periods =
g_list_insert_before (client->mpd_node->Periods, next,
new_periods->data);
new_periods = g_list_delete_link (new_periods, new_periods);
}
next = NULL;
/* Update our iterator to the first new period if any, or the next */
if (prev)
l = prev->next;
else
l = client->mpd_node->Periods;
continue;
}
if (period->SegmentList && period->SegmentList->xlink_href
&& period->SegmentList->actuate == GST_XLINK_ACTUATE_ON_LOAD) {
GstSegmentListNode *new_segment_list;
gboolean error;
new_segment_list =
gst_mpd_client_fetch_external_segment_list (client, period, NULL,
NULL, NULL, period->SegmentList, &error);
if (!new_segment_list && error)
goto syntax_error;
gst_mpdparser_free_segment_list_node (period->SegmentList);
period->SegmentList = new_segment_list;
}
for (m = period->AdaptationSets; m; /* explicitly advanced below */ ) {
GstAdaptationSetNode *adapt_set = m->data;
GList *n;
if (adapt_set->xlink_href
&& adapt_set->actuate == GST_XLINK_ACTUATE_ON_LOAD) {
GList *new_adapt_sets, *prev, *next;
gboolean error;
new_adapt_sets =
gst_mpd_client_fetch_external_adaptation_set (client, period,
adapt_set, &error);
if (!new_adapt_sets && error)
goto syntax_error;
prev = l->prev;
period->AdaptationSets = g_list_delete_link (period->AdaptationSets, l);
gst_mpdparser_free_adaptation_set_node (adapt_set);
adapt_set = NULL;
/* Get new next node, we will insert before this */
if (prev)
next = prev->next;
else
next = period->AdaptationSets;
while (new_adapt_sets) {
period->AdaptationSets =
g_list_insert_before (period->AdaptationSets, next,
new_adapt_sets->data);
new_adapt_sets = g_list_delete_link (new_adapt_sets, new_adapt_sets);
}
next = NULL;
/* Update our iterator to the first new adapt_set if any, or the next */
if (prev)
l = prev->next;
else
l = period->AdaptationSets;
continue;
}
if (adapt_set->SegmentList && adapt_set->SegmentList->xlink_href
&& adapt_set->SegmentList->actuate == GST_XLINK_ACTUATE_ON_LOAD) {
GstSegmentListNode *new_segment_list;
gboolean error;
new_segment_list =
gst_mpd_client_fetch_external_segment_list (client, period,
adapt_set, NULL, period->SegmentList, adapt_set->SegmentList,
&error);
if (!new_segment_list && error)
goto syntax_error;
gst_mpdparser_free_segment_list_node (adapt_set->SegmentList);
adapt_set->SegmentList = new_segment_list;
}
for (n = adapt_set->Representations; n; n = n->next) {
GstRepresentationNode *representation = n->data;
if (representation->SegmentList
&& representation->SegmentList->xlink_href
&& representation->SegmentList->actuate ==
GST_XLINK_ACTUATE_ON_LOAD) {
GstSegmentListNode *new_segment_list;
gboolean error;
new_segment_list =
gst_mpd_client_fetch_external_segment_list (client, period,
adapt_set, representation, adapt_set->SegmentList,
representation->SegmentList, &error);
if (!new_segment_list && error)
goto syntax_error;
gst_mpdparser_free_segment_list_node (representation->SegmentList);
representation->SegmentList = new_segment_list;
}
}
m = m->next;
}
l = l->next;
}
return TRUE;
syntax_error:
return FALSE;
}
gboolean
gst_mpd_parse (GstMpdClient * client, 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 (&client->mpd_node, root_element);
}
/* free the document */
xmlFreeDoc (doc);
}
if (ret) {
gst_mpd_client_check_profiles (client);
if (!gst_mpd_client_fetch_on_load_external_resources (client))
return FALSE;
}
}
return ret;
}
const gchar *
gst_mpdparser_get_baseURL (GstMpdClient * client, guint indexStream)
{
GstActiveStream *stream;
g_return_val_if_fail (client != NULL, NULL);
g_return_val_if_fail (client->active_streams != NULL, NULL);
stream = g_list_nth_data (client->active_streams, indexStream);
g_return_val_if_fail (stream != NULL, NULL);
return stream->baseURL;
}
static GstClockTime
gst_mpdparser_get_segment_end_time (GstMpdClient * client, GPtrArray * segments,
const GstMediaSegment * segment, gint index)
{
const GstStreamPeriod *stream_period;
GstClockTime end;
if (segment->repeat >= 0)
return segment->start + (segment->repeat + 1) * segment->duration;
if (index < segments->len - 1) {
const GstMediaSegment *next_segment =
g_ptr_array_index (segments, index + 1);
end = next_segment->start;
} else {
stream_period = gst_mpdparser_get_stream_period (client);
end = stream_period->start + stream_period->duration;
}
return end;
}
static gboolean
gst_mpdparser_find_segment_by_index (GstMpdClient * client,
GPtrArray * segments, gint index, GstMediaSegment * result)
{
gint i;
for (i = 0; i < segments->len; i++) {
GstMediaSegment *s;
gint repeat;
s = g_ptr_array_index (segments, i);
if (s->repeat >= 0) {
repeat = s->repeat;
} else {
GstClockTime start = s->start;
GstClockTime end =
gst_mpdparser_get_segment_end_time (client, segments, s, i);
repeat = (guint) (end - start) / s->duration;
}
if (s->number + repeat >= index) {
/* it is in this segment */
result->SegmentURL = s->SegmentURL;
result->number = index;
result->scale_start =
s->scale_start + (index - s->number) * s->scale_duration;
result->scale_duration = s->scale_duration;
result->start = s->start + (index - s->number) * s->duration;
result->duration = s->duration;
return TRUE;
}
}
return FALSE;
}
gboolean
gst_mpdparser_get_chunk_by_index (GstMpdClient * client, guint indexStream,
guint indexChunk, GstMediaSegment * segment)
{
GstActiveStream *stream;
/* select stream */
g_return_val_if_fail (client != NULL, FALSE);
g_return_val_if_fail (client->active_streams != NULL, FALSE);
stream = g_list_nth_data (client->active_streams, indexStream);
g_return_val_if_fail (stream != NULL, FALSE);
indexChunk += 1;
if (stream->segments) {
return gst_mpdparser_find_segment_by_index (client, stream->segments,
indexChunk, segment);
} else {
GstClockTime duration;
GstStreamPeriod *stream_period;
guint64 scale_dur;
g_return_val_if_fail (stream->cur_seg_template->MultSegBaseType->
SegmentTimeline == NULL, FALSE);
/* segment template generator */
duration = gst_mpd_client_get_segment_duration (client, stream, &scale_dur);
if (!GST_CLOCK_TIME_IS_VALID (duration))
return FALSE;
stream_period = gst_mpdparser_get_stream_period (client);
segment->number = indexChunk
+ stream->cur_seg_template->MultSegBaseType->startNumber;
segment->scale_start = indexChunk * scale_dur;
segment->scale_duration = scale_dur;
segment->start = duration * indexChunk;
segment->duration = duration;
segment->SegmentURL = NULL;
if (segment->start >= stream_period->duration) {
return FALSE;
}
}
return TRUE;
}
static gboolean
gst_mpd_client_add_media_segment (GstActiveStream * stream,
GstSegmentURLNode * url_node, guint number, gint repeat,
guint64 scale_start, guint64 scale_duration,
GstClockTime start, GstClockTime duration)
{
GstMediaSegment *media_segment;
g_return_val_if_fail (stream->segments != NULL, FALSE);
media_segment = g_slice_new0 (GstMediaSegment);
media_segment->SegmentURL = url_node;
media_segment->number = number;
media_segment->scale_start = scale_start;
media_segment->scale_duration = scale_duration;
media_segment->start = start;
media_segment->duration = duration;
media_segment->repeat = repeat;
g_ptr_array_add (stream->segments, media_segment);
GST_LOG ("Added new segment: number %d, repeat %d, "
"ts: %" GST_TIME_FORMAT ", dur: %"
GST_TIME_FORMAT, number, repeat,
GST_TIME_ARGS (start), GST_TIME_ARGS (duration));
return TRUE;
}
gboolean
gst_mpd_client_setup_representation (GstMpdClient * client,
GstActiveStream * stream, GstRepresentationNode * representation)
{
GstStreamPeriod *stream_period;
GList *rep_list;
GstClockTime PeriodStart, PeriodEnd, start_time, duration;
GstMediaSegment *last_media_segment;
guint i;
guint64 start;
if (stream->cur_adapt_set == NULL) {
GST_WARNING ("No valid AdaptationSet node in the MPD file, aborting...");
return FALSE;
}
rep_list = stream->cur_adapt_set->Representations;
stream->cur_representation = representation;
stream->representation_idx = g_list_index (rep_list, representation);
/* clean the old segment list, if any */
if (stream->segments) {
g_ptr_array_unref (stream->segments);
stream->segments = NULL;
}
stream_period = gst_mpdparser_get_stream_period (client);
g_return_val_if_fail (stream_period != NULL, FALSE);
g_return_val_if_fail (stream_period->period != NULL, FALSE);
PeriodStart = stream_period->start;
if (GST_CLOCK_TIME_IS_VALID (stream_period->duration))
PeriodEnd = stream_period->start + stream_period->duration;
else
PeriodEnd = GST_CLOCK_TIME_NONE;
GST_LOG ("Building segment list for Period from %" GST_TIME_FORMAT " to %"
GST_TIME_FORMAT, GST_TIME_ARGS (PeriodStart), GST_TIME_ARGS (PeriodEnd));
if (representation->SegmentBase != NULL
|| representation->SegmentList != NULL) {
GList *SegmentURL;
/* We have a fixed list of segments for any of the cases here,
* init the segments list */
gst_mpdparser_init_active_stream_segments (stream);
/* get the first segment_base of the selected representation */
if ((stream->cur_segment_base =
gst_mpdparser_get_segment_base (stream_period->period,
stream->cur_adapt_set, representation)) == NULL) {
GST_DEBUG ("No useful SegmentBase node for the current Representation");
}
/* get the first segment_list of the selected representation */
if ((stream->cur_segment_list =
gst_mpdparser_get_segment_list (client, stream_period->period,
stream->cur_adapt_set, representation)) == NULL) {
GST_DEBUG ("No useful SegmentList node for the current Representation");
/* here we should have a single segment for each representation, whose URL is encoded in the baseURL element */
if (!gst_mpd_client_add_media_segment (stream, NULL, 1, 0, 0,
PeriodEnd - PeriodStart, 0, PeriodEnd - PeriodStart)) {
return FALSE;
}
} else {
/* build the list of GstMediaSegment nodes from the SegmentList node */
SegmentURL = stream->cur_segment_list->SegmentURL;
if (SegmentURL == NULL) {
GST_WARNING
("No valid list of SegmentURL nodes in the MPD file, aborting...");
return FALSE;
}
/* build segment list */
i = stream->cur_segment_list->MultSegBaseType->startNumber;
start = 0;
start_time = 0;
GST_LOG ("Building media segment list using a SegmentList node");
if (stream->cur_segment_list->MultSegBaseType->SegmentTimeline) {
GstSegmentTimelineNode *timeline;
GstSNode *S;
GList *list;
timeline = stream->cur_segment_list->MultSegBaseType->SegmentTimeline;
for (list = g_queue_peek_head_link (&timeline->S); list;
list = g_list_next (list)) {
guint timescale;
S = (GstSNode *) list->data;
GST_LOG ("Processing S node: d=%" G_GUINT64_FORMAT " r=%d t=%"
G_GUINT64_FORMAT, S->d, S->r, S->t);
timescale =
stream->cur_segment_list->MultSegBaseType->SegBaseType->timescale;
duration = gst_util_uint64_scale (S->d, GST_SECOND, timescale);
if (S->t > 0) {
start = S->t;
start_time = gst_util_uint64_scale (S->t, GST_SECOND, timescale);
}
if (!SegmentURL) {
GST_WARNING
("SegmentTimeline does not have a matching SegmentURL, aborting...");
return FALSE;
}
if (!gst_mpd_client_add_media_segment (stream, SegmentURL->data, i,
S->r, start, S->d, start_time, duration)) {
return FALSE;
}
i += S->r + 1;
start_time += duration * (S->r + 1);
start += S->d * (S->r + 1);
SegmentURL = g_list_next (SegmentURL);
}
} else {
guint64 scale_dur;
duration =
gst_mpd_client_get_segment_duration (client, stream, &scale_dur);
if (!GST_CLOCK_TIME_IS_VALID (duration))
return FALSE;
while (SegmentURL) {
if (!gst_mpd_client_add_media_segment (stream, SegmentURL->data, i,
0, start, scale_dur, start_time, duration)) {
return FALSE;
}
i++;
start += scale_dur;
start_time += duration;
SegmentURL = g_list_next (SegmentURL);
}
}
}
} else {
if (representation->SegmentTemplate != NULL) {
stream->cur_seg_template = representation->SegmentTemplate;
} else if (stream->cur_adapt_set->SegmentTemplate != NULL) {
stream->cur_seg_template = stream->cur_adapt_set->SegmentTemplate;
} else if (stream_period->period->SegmentTemplate != NULL) {
stream->cur_seg_template = stream_period->period->SegmentTemplate;
}
if (stream->cur_seg_template == NULL
|| stream->cur_seg_template->MultSegBaseType == NULL) {
gst_mpdparser_init_active_stream_segments (stream);
/* here we should have a single segment for each representation, whose URL is encoded in the baseURL element */
if (!gst_mpd_client_add_media_segment (stream, NULL, 1, 0, 0,
PeriodEnd - PeriodStart, 0, PeriodEnd - PeriodStart)) {
return FALSE;
}
} else {
GstMultSegmentBaseType *mult_seg =
stream->cur_seg_template->MultSegBaseType;
/* build segment list */
i = mult_seg->startNumber;
start = 0;
start_time = 0;
GST_LOG ("Building media segment list using this template: %s",
stream->cur_seg_template->media);
/* Avoid overflows */
stream->presentationTimeOffset =
gst_util_uint64_scale (mult_seg->SegBaseType->presentationTimeOffset,
GST_SECOND, mult_seg->SegBaseType->timescale);
GST_LOG ("Setting stream's presentation time offset to %" GST_TIME_FORMAT,
GST_TIME_ARGS (stream->presentationTimeOffset));
if (mult_seg->SegmentTimeline) {
GstSegmentTimelineNode *timeline;
GstSNode *S;
GList *list;
timeline = mult_seg->SegmentTimeline;
gst_mpdparser_init_active_stream_segments (stream);
for (list = g_queue_peek_head_link (&timeline->S); list;
list = g_list_next (list)) {
guint timescale;
S = (GstSNode *) list->data;
GST_LOG ("Processing S node: d=%" G_GUINT64_FORMAT " r=%u t=%"
G_GUINT64_FORMAT, S->d, S->r, S->t);
timescale = mult_seg->SegBaseType->timescale;
duration = gst_util_uint64_scale (S->d, GST_SECOND, timescale);
if (S->t > 0) {
start = S->t;
start_time = gst_util_uint64_scale (S->t, GST_SECOND, timescale);
}
if (!gst_mpd_client_add_media_segment (stream, NULL, i, S->r, start,
S->d, start_time, duration)) {
return FALSE;
}
i += S->r + 1;
start += S->d * (S->r + 1);
start_time += duration * (S->r + 1);
}
} else {
/* NOP - The segment is created on demand with the template, no need
* to build a list */
}
}
}
/* check duration of last segment */
last_media_segment = (stream->segments && stream->segments->len) ?
g_ptr_array_index (stream->segments, stream->segments->len - 1) : NULL;
if (last_media_segment && GST_CLOCK_TIME_IS_VALID (PeriodEnd)) {
if (last_media_segment->start + last_media_segment->duration > PeriodEnd) {
last_media_segment->duration =
PeriodEnd - PeriodStart - last_media_segment->start;
GST_LOG ("Fixed duration of last segment: %" GST_TIME_FORMAT,
GST_TIME_ARGS (last_media_segment->duration));
}
GST_LOG ("Built a list of %d segments", last_media_segment->number);
}
g_free (stream->baseURL);
g_free (stream->queryURL);
stream->baseURL =
gst_mpdparser_parse_baseURL (client, stream, &stream->queryURL);
return TRUE;
}
static GList *
gst_mpd_client_fetch_external_period (GstMpdClient * client,
GstPeriodNode * period_node, gboolean * error)
{
GstFragment *download;
GstBuffer *period_buffer;
GstMapInfo map;
GError *err = NULL;
xmlDocPtr doc;
GstUri *base_uri, *uri;
gchar *query = NULL;
gchar *uri_string;
GList *new_periods = NULL;
*error = FALSE;
/* ISO/IEC 23009-1:2014 5.5.3 4)
* Remove nodes that resolve to nothing when resolving
*/
if (strcmp (period_node->xlink_href,
"urn:mpeg:dash:resolve-to-zero:2013") == 0) {
return NULL;
}
if (!client->downloader) {
*error = TRUE;
return NULL;
}
/* Build absolute URI */
/* Get base URI at the MPD level */
base_uri =
gst_uri_from_string (client->
mpd_base_uri ? client->mpd_base_uri : client->mpd_uri);
/* combine a BaseURL at the MPD level with the current base url */
base_uri = combine_urls (base_uri, client->mpd_node->BaseURLs, &query, 0);
uri = gst_uri_from_string_with_base (base_uri, period_node->xlink_href);
if (query)
gst_uri_set_query_string (uri, query);
g_free (query);
uri_string = gst_uri_to_string (uri);
gst_uri_unref (base_uri);
gst_uri_unref (uri);
download =
gst_uri_downloader_fetch_uri (client->downloader,
uri_string, client->mpd_uri, TRUE, FALSE, TRUE, &err);
g_free (uri_string);
if (!download) {
GST_ERROR ("Failed to download external Period node at '%s': %s",
period_node->xlink_href, err->message);
g_clear_error (&err);
*error = TRUE;
return NULL;
}
period_buffer = gst_fragment_get_buffer (download);
g_object_unref (download);
gst_buffer_map (period_buffer, &map, GST_MAP_READ);
doc =
xmlReadMemory ((const gchar *) map.data, map.size, "noname.xml", NULL,
XML_PARSE_NONET);
if (doc) {
xmlNode *root_element = xmlDocGetRootElement (doc);
if (root_element->type != XML_ELEMENT_NODE ||
xmlStrcmp (root_element->name, (xmlChar *) "Period") != 0) {
xmlFreeDoc (doc);
gst_buffer_unmap (period_buffer, &map);
gst_buffer_unref (period_buffer);
*error = TRUE;
return NULL;
}
gst_mpdparser_parse_period_node (&new_periods, root_element);
} else {
GST_ERROR ("Failed to parse period node XML");
gst_buffer_unmap (period_buffer, &map);
gst_buffer_unref (period_buffer);
*error = TRUE;
return NULL;
}
gst_buffer_unmap (period_buffer, &map);
gst_buffer_unref (period_buffer);
return new_periods;
}
gboolean
gst_mpd_client_setup_media_presentation (GstMpdClient * client,
GstClockTime time, gint period_idx, const gchar * period_id)
{
GstStreamPeriod *stream_period;
GstClockTime start, duration;
GList *list, *next;
guint idx;
gboolean ret = FALSE;
g_return_val_if_fail (client != NULL, FALSE);
g_return_val_if_fail (client->mpd_node != NULL, FALSE);
/* Check if we set up the media presentation far enough already */
for (list = client->periods; list; list = list->next) {
GstStreamPeriod *stream_period = list->data;
if ((time != GST_CLOCK_TIME_NONE
&& stream_period->duration != GST_CLOCK_TIME_NONE
&& stream_period->start + stream_period->duration >= time)
|| (time != GST_CLOCK_TIME_NONE && stream_period->start >= time))
return TRUE;
if (period_idx != -1 && stream_period->number >= period_idx)
return TRUE;
if (period_id != NULL && stream_period->period->id != NULL
&& strcmp (stream_period->period->id, period_id) == 0)
return TRUE;
}
GST_DEBUG ("Building the list of Periods in the Media Presentation");
/* clean the old period list, if any */
/* TODO: In theory we could reuse the ones we have so far but that
* seems more complicated than the overhead caused here
*/
if (client->periods) {
g_list_foreach (client->periods,
(GFunc) gst_mpdparser_free_stream_period, NULL);
g_list_free (client->periods);
client->periods = NULL;
}
idx = 0;
start = 0;
duration = GST_CLOCK_TIME_NONE;
if (client->mpd_node->mediaPresentationDuration <= 0 &&
client->mpd_node->mediaPresentationDuration != -1) {
/* Invalid MPD file: MPD duration is negative or zero */
goto syntax_error;
}
for (list = client->mpd_node->Periods; list; /* explicitly advanced below */ ) {
GstPeriodNode *period_node = list->data;
GstPeriodNode *next_period_node = NULL;
/* Download external period */
if (period_node->xlink_href) {
GList *new_periods;
gboolean error = FALSE;
GList *prev;
new_periods =
gst_mpd_client_fetch_external_period (client, period_node, &error);
if (!new_periods && error)
goto syntax_error;
prev = list->prev;
client->mpd_node->Periods =
g_list_delete_link (client->mpd_node->Periods, list);
gst_mpdparser_free_period_node (period_node);
period_node = NULL;
/* Get new next node, we will insert before this */
if (prev)
next = prev->next;
else
next = client->mpd_node->Periods;
while (new_periods) {
client->mpd_node->Periods =
g_list_insert_before (client->mpd_node->Periods, next,
new_periods->data);
new_periods = g_list_delete_link (new_periods, new_periods);
}
next = NULL;
/* Update our iterator to the first new period if any, or the next */
if (prev)
list = prev->next;
else
list = client->mpd_node->Periods;
/* And try again */
continue;
}
if (period_node->start != -1) {
/* we have a regular period */
/* start cannot be smaller than previous start */
if (list != g_list_first (client->mpd_node->Periods)
&& start >= period_node->start * GST_MSECOND) {
/* Invalid MPD file: duration would be negative or zero */
goto syntax_error;
}
start = period_node->start * GST_MSECOND;
} else if (duration != GST_CLOCK_TIME_NONE) {
/* start time inferred from previous period, this is still a regular period */
start += duration;
} else if (idx == 0 && client->mpd_node->type == GST_MPD_FILE_TYPE_STATIC) {
/* first period of a static MPD file, start time is 0 */
start = 0;
} else if (client->mpd_node->type == GST_MPD_FILE_TYPE_DYNAMIC) {
/* this should be a live stream, let this pass */
} else {
/* this is an 'Early Available Period' */
goto early;
}
/* compute duration.
If there is a start time for the next period, or this is the last period
and mediaPresentationDuration was set, those values will take precedence
over a configured period duration in computing this period's duration
ISO/IEC 23009-1:2014(E), chapter 5.3.2.1
"The Period extends until the PeriodStart of the next Period, or until
the end of the Media Presentation in the case of the last Period."
*/
while ((next = g_list_next (list)) != NULL) {
/* try to infer this period duration from the start time of the next period */
next_period_node = next->data;
if (next_period_node->xlink_href) {
gboolean next_error;
GList *new_periods;
new_periods =
gst_mpd_client_fetch_external_period (client, next_period_node,
&next_error);
if (!new_periods && next_error)
goto syntax_error;
client->mpd_node->Periods =
g_list_delete_link (client->mpd_node->Periods, next);
gst_mpdparser_free_period_node (next_period_node);
next_period_node = NULL;
/* Get new next node, we will insert before this */
next = g_list_next (list);
while (new_periods) {
client->mpd_node->Periods =
g_list_insert_before (client->mpd_node->Periods, next,
new_periods->data);
new_periods = g_list_delete_link (new_periods, new_periods);
}
/* And try again, getting the next list element which is now our newly
* inserted nodes. If any */
} else {
/* Got the next period and it doesn't have to be downloaded first */
break;
}
}
if (next_period_node) {
if (next_period_node->start != -1) {
if (start >= next_period_node->start * GST_MSECOND) {
/* Invalid MPD file: duration would be negative or zero */
goto syntax_error;
}
duration = next_period_node->start * GST_MSECOND - start;
} else if (period_node->duration != -1) {
if (period_node->duration <= 0) {
/* Invalid MPD file: duration would be negative or zero */
goto syntax_error;
}
duration = period_node->duration * GST_MSECOND;
} else if (client->mpd_node->type == GST_MPD_FILE_TYPE_DYNAMIC) {
/* might be a live file, ignore unspecified duration */
} else {
/* Invalid MPD file! */
goto syntax_error;
}
} else if (client->mpd_node->mediaPresentationDuration != -1) {
/* last Period of the Media Presentation */
if (client->mpd_node->mediaPresentationDuration * GST_MSECOND <= start) {
/* Invalid MPD file: duration would be negative or zero */
goto syntax_error;
}
duration =
client->mpd_node->mediaPresentationDuration * GST_MSECOND - start;
} else if (period_node->duration != -1) {
duration = period_node->duration * GST_MSECOND;
} else if (client->mpd_node->type == GST_MPD_FILE_TYPE_DYNAMIC) {
/* might be a live file, ignore unspecified duration */
} else {
/* Invalid MPD file! */
goto syntax_error;
}
stream_period = g_slice_new0 (GstStreamPeriod);
client->periods = g_list_append (client->periods, stream_period);
stream_period->period = period_node;
stream_period->number = idx++;
stream_period->start = start;
stream_period->duration = duration;
ret = TRUE;
GST_LOG (" - added Period %d start=%" GST_TIME_FORMAT " duration=%"
GST_TIME_FORMAT, idx, GST_TIME_ARGS (start), GST_TIME_ARGS (duration));
if ((time != GST_CLOCK_TIME_NONE
&& stream_period->duration != GST_CLOCK_TIME_NONE
&& stream_period->start + stream_period->duration >= time)
|| (time != GST_CLOCK_TIME_NONE && stream_period->start >= time))
break;
if (period_idx != -1 && stream_period->number >= period_idx)
break;
if (period_id != NULL && stream_period->period->id != NULL
&& strcmp (stream_period->period->id, period_id) == 0)
break;
list = list->next;
}
GST_DEBUG
("Found a total of %d valid Periods in the Media Presentation up to this point",
idx);
return ret;
early:
GST_WARNING
("Found an Early Available Period, skipping the rest of the Media Presentation");
return ret;
syntax_error:
GST_WARNING
("Cannot get the duration of the Period %d, skipping the rest of the Media Presentation",
idx);
return ret;
}
static GList *
gst_mpd_client_fetch_external_adaptation_set (GstMpdClient * client,
GstPeriodNode * period, GstAdaptationSetNode * adapt_set, gboolean * error)
{
GstFragment *download;
GstBuffer *adapt_set_buffer;
GstMapInfo map;
GError *err = NULL;
xmlDocPtr doc;
GstUri *base_uri, *uri;
gchar *query = NULL;
gchar *uri_string;
GList *new_adapt_sets = NULL;
*error = FALSE;
/* ISO/IEC 23009-1:2014 5.5.3 4)
* Remove nodes that resolve to nothing when resolving
*/
if (strcmp (adapt_set->xlink_href, "urn:mpeg:dash:resolve-to-zero:2013") == 0) {
return NULL;
}
if (!client->downloader) {
*error = TRUE;
return NULL;
}
/* Build absolute URI */
/* Get base URI at the MPD level */
base_uri =
gst_uri_from_string (client->
mpd_base_uri ? client->mpd_base_uri : client->mpd_uri);
/* combine a BaseURL at the MPD level with the current base url */
base_uri = combine_urls (base_uri, client->mpd_node->BaseURLs, &query, 0);
/* combine a BaseURL at the Period level with the current base url */
base_uri = combine_urls (base_uri, period->BaseURLs, &query, 0);
uri = gst_uri_from_string_with_base (base_uri, adapt_set->xlink_href);
if (query)
gst_uri_set_query_string (uri, query);
g_free (query);
uri_string = gst_uri_to_string (uri);
gst_uri_unref (base_uri);
gst_uri_unref (uri);
download =
gst_uri_downloader_fetch_uri (client->downloader,
uri_string, client->mpd_uri, TRUE, FALSE, TRUE, &err);
g_free (uri_string);
if (!download) {
GST_ERROR ("Failed to download external AdaptationSet node at '%s': %s",
adapt_set->xlink_href, err->message);
g_clear_error (&err);
*error = TRUE;
return NULL;
}
adapt_set_buffer = gst_fragment_get_buffer (download);
g_object_unref (download);
gst_buffer_map (adapt_set_buffer, &map, GST_MAP_READ);
doc =
xmlReadMemory ((const gchar *) map.data, map.size, "noname.xml", NULL,
XML_PARSE_NONET);
if (doc) {
xmlNode *root_element = xmlDocGetRootElement (doc);
if (root_element->type != XML_ELEMENT_NODE ||
xmlStrcmp (root_element->name, (xmlChar *) "AdaptationSet") != 0) {
xmlFreeDoc (doc);
gst_buffer_unmap (adapt_set_buffer, &map);
gst_buffer_unref (adapt_set_buffer);
*error = TRUE;
return NULL;
}
gst_mpdparser_parse_adaptation_set_node (&new_adapt_sets, root_element,
period);
} else {
GST_ERROR ("Failed to parse adaptation set node XML");
gst_buffer_unmap (adapt_set_buffer, &map);
gst_buffer_unref (adapt_set_buffer);
*error = TRUE;
return NULL;
}
gst_buffer_unmap (adapt_set_buffer, &map);
gst_buffer_unref (adapt_set_buffer);
return new_adapt_sets;
}
static GList *
gst_mpd_client_get_adaptation_sets_for_period (GstMpdClient * client,
GstStreamPeriod * period)
{
GList *list;
g_return_val_if_fail (period != NULL, NULL);
/* Resolve all external adaptation sets of this period. Every user of
* the adaptation sets would need to know the content of all adaptation sets
* to decide which one to use, so we have to resolve them all here
*/
for (list = period->period->AdaptationSets; list;
/* advanced explicitely below */ ) {
GstAdaptationSetNode *adapt_set = (GstAdaptationSetNode *) list->data;
GList *new_adapt_sets = NULL, *prev, *next;
gboolean error;
if (!adapt_set->xlink_href) {
list = list->next;
continue;
}
new_adapt_sets =
gst_mpd_client_fetch_external_adaptation_set (client, period->period,
adapt_set, &error);
prev = list->prev;
period->period->AdaptationSets =
g_list_delete_link (period->period->AdaptationSets, list);
gst_mpdparser_free_adaptation_set_node (adapt_set);
adapt_set = NULL;
/* Get new next node, we will insert before this */
if (prev)
next = prev->next;
else
next = period->period->AdaptationSets;
while (new_adapt_sets) {
period->period->AdaptationSets =
g_list_insert_before (period->period->AdaptationSets, next,
new_adapt_sets->data);
new_adapt_sets = g_list_delete_link (new_adapt_sets, new_adapt_sets);
}
/* Update our iterator to the first new adaptation set if any, or the next */
if (prev)
list = prev->next;
else
list = period->period->AdaptationSets;
}
return period->period->AdaptationSets;
}
GList *
gst_mpd_client_get_adaptation_sets (GstMpdClient * client)
{
GstStreamPeriod *stream_period;
stream_period = gst_mpdparser_get_stream_period (client);
if (stream_period == NULL || stream_period->period == NULL) {
GST_DEBUG ("No more Period nodes in the MPD file, terminating...");
return NULL;
}
return gst_mpd_client_get_adaptation_sets_for_period (client, stream_period);
}
gboolean
gst_mpd_client_setup_streaming (GstMpdClient * client,
GstAdaptationSetNode * adapt_set)
{
GstRepresentationNode *representation;
GList *rep_list = NULL;
GstActiveStream *stream;
rep_list = adapt_set->Representations;
if (!rep_list) {
GST_WARNING ("Can not retrieve any representation, aborting...");
return FALSE;
}
stream = g_slice_new0 (GstActiveStream);
gst_mpdparser_init_active_stream_segments (stream);
stream->baseURL_idx = 0;
stream->cur_adapt_set = adapt_set;
GST_DEBUG ("0. Current stream %p", stream);
/* retrieve representation list */
if (stream->cur_adapt_set != NULL)
rep_list = stream->cur_adapt_set->Representations;
#if 0
/* fast start */
representation =
gst_mpdparser_get_representation_with_max_bandwidth (rep_list,
stream->max_bandwidth);
if (!representation) {
GST_WARNING
("Can not retrieve a representation with the requested bandwidth");
representation = gst_mpdparser_get_lowest_representation (rep_list);
}
#else
/* slow start */
representation = gst_mpdparser_get_lowest_representation (rep_list);
#endif
if (!representation) {
GST_WARNING ("No valid representation in the MPD file, aborting...");
g_slice_free (GstActiveStream, stream);
return FALSE;
}
stream->mimeType =
gst_mpdparser_representation_get_mimetype (adapt_set, representation);
if (stream->mimeType == GST_STREAM_UNKNOWN) {
GST_WARNING ("Unknown mime type in the representation, aborting...");
g_slice_free (GstActiveStream, stream);
return FALSE;
}
client->active_streams = g_list_append (client->active_streams, stream);
if (!gst_mpd_client_setup_representation (client, stream, representation)) {
GST_WARNING ("Failed to setup the representation, aborting...");
return FALSE;
}
GST_INFO ("Successfully setup the download pipeline for mimeType %d",
stream->mimeType);
return TRUE;
}
gboolean
gst_mpd_client_stream_seek (GstMpdClient * client, GstActiveStream * stream,
GstClockTime ts)
{
gint index = 0;
gint repeat_index = 0;
GstMediaSegment *selectedChunk = NULL;
gboolean in_segment;
g_return_val_if_fail (stream != NULL, 0);
if (stream->segments) {
for (index = 0; index < stream->segments->len; index++) {
GstMediaSegment *segment = g_ptr_array_index (stream->segments, index);
GST_DEBUG ("Looking at fragment sequence chunk %d / %d", index,
stream->segments->len);
in_segment = FALSE;
if (segment->start <= ts) {
if (segment->repeat >= 0) {
in_segment =
ts < segment->start + (segment->repeat + 1) * segment->duration;
} else {
GstClockTime end =
gst_mpdparser_get_segment_end_time (client, stream->segments,
segment, index);
in_segment = ts < end;
}
if (in_segment) {
selectedChunk = segment;
repeat_index = (ts - segment->start) / segment->duration;
break;
}
}
}
if (selectedChunk == NULL) {
stream->segment_index = stream->segments->len;
stream->segment_repeat_index = 0;
GST_DEBUG ("Seek to after last segment");
return FALSE;
}
} else {
GstClockTime duration =
gst_mpd_client_get_segment_duration (client, stream, NULL);
GstStreamPeriod *stream_period = gst_mpdparser_get_stream_period (client);
guint segments_count = gst_mpd_client_get_segments_counts (client, stream);
g_return_val_if_fail (stream->cur_seg_template->
MultSegBaseType->SegmentTimeline == NULL, FALSE);
if (!GST_CLOCK_TIME_IS_VALID (duration)) {
return FALSE;
}
if (ts > stream_period->start)
ts -= stream_period->start;
else
ts = 0;
index = ts / duration;
if (segments_count > 0 && index >= segments_count) {
stream->segment_index = segments_count;
stream->segment_repeat_index = 0;
GST_DEBUG ("Seek to after last segment");
return FALSE;
}
}
stream->segment_repeat_index = repeat_index;
stream->segment_index = index;
return TRUE;
}
gint64
gst_mpd_client_calculate_time_difference (const GstDateTime * t1,
const GstDateTime * t2)
{
GDateTime *gdt1, *gdt2;
GTimeSpan diff;
g_assert (t1 != NULL && t2 != NULL);
gdt1 = gst_date_time_to_g_date_time ((GstDateTime *) t1);
gdt2 = gst_date_time_to_g_date_time ((GstDateTime *) t2);
diff = g_date_time_difference (gdt2, gdt1);
g_date_time_unref (gdt1);
g_date_time_unref (gdt2);
return diff * GST_USECOND;
}
GstDateTime *
gst_mpd_client_add_time_difference (GstDateTime * t1, gint64 usecs)
{
GDateTime *gdt;
GDateTime *gdt2;
GstDateTime *rv;
g_assert (t1 != NULL);
gdt = gst_date_time_to_g_date_time (t1);
g_assert (gdt != NULL);
gdt2 = g_date_time_add (gdt, usecs);
g_assert (gdt2 != NULL);
g_date_time_unref (gdt);
rv = gst_date_time_new_from_g_date_time (gdt2);
/* Don't g_date_time_unref(gdt2) because gst_date_time_new_from_g_date_time takes
* ownership of the GDateTime pointer.
*/
return rv;
}
static GstDateTime *
gst_mpd_client_get_availability_start_time (GstMpdClient * client)
{
GstDateTime *start_time;
if (client == NULL)
return (GstDateTime *) NULL;
start_time = client->mpd_node->availabilityStartTime;
if (start_time)
gst_date_time_ref (start_time);
return start_time;
}
gboolean
gst_mpd_client_get_last_fragment_timestamp_end (GstMpdClient * client,
guint stream_idx, GstClockTime * ts)
{
GstActiveStream *stream;
gint segment_idx;
GstMediaSegment *currentChunk;
GstStreamPeriod *stream_period;
GST_DEBUG ("Stream index: %i", stream_idx);
stream = g_list_nth_data (client->active_streams, stream_idx);
g_return_val_if_fail (stream != NULL, 0);
segment_idx = gst_mpd_client_get_segments_counts (client, stream) - 1;
currentChunk = g_ptr_array_index (stream->segments, segment_idx);
if (currentChunk->repeat >= 0) {
*ts =
currentChunk->start + (currentChunk->duration * (1 +
currentChunk->repeat));
} else {
/* 5.3.9.6.1: negative repeat means repeat till the end of the
* period, or the next update of the MPD (which I think is
* implicit, as this will all get deleted/recreated), or the
* start of the next segment, if any. */
stream_period = gst_mpdparser_get_stream_period (client);
*ts = stream_period->start + stream_period->duration;
}
return TRUE;
}
gboolean
gst_mpd_client_get_next_fragment_timestamp (GstMpdClient * client,
guint stream_idx, GstClockTime * ts)
{
GstActiveStream *stream;
GstMediaSegment *currentChunk;
GST_DEBUG ("Stream index: %i", stream_idx);
stream = g_list_nth_data (client->active_streams, stream_idx);
g_return_val_if_fail (stream != NULL, 0);
if (stream->segments) {
GST_DEBUG ("Looking for fragment sequence chunk %d / %d",
stream->segment_index, stream->segments->len);
if (stream->segment_index >= stream->segments->len)
return FALSE;
currentChunk = g_ptr_array_index (stream->segments, stream->segment_index);
*ts =
currentChunk->start +
(currentChunk->duration * stream->segment_repeat_index);
} else {
GstClockTime duration =
gst_mpd_client_get_segment_duration (client, stream, NULL);
guint segments_count = gst_mpd_client_get_segments_counts (client, stream);
g_return_val_if_fail (stream->cur_seg_template->
MultSegBaseType->SegmentTimeline == NULL, FALSE);
if (!GST_CLOCK_TIME_IS_VALID (duration) || (segments_count > 0
&& stream->segment_index >= segments_count)) {
return FALSE;
}
*ts = stream->segment_index * duration;
}
return TRUE;
}
GstClockTime
gst_mpd_parser_get_stream_presentation_offset (GstMpdClient * client,
guint stream_idx)
{
GstActiveStream *stream = NULL;
g_return_val_if_fail (client != NULL, 0);
g_return_val_if_fail (client->active_streams != NULL, 0);
stream = g_list_nth_data (client->active_streams, stream_idx);
g_return_val_if_fail (stream != NULL, 0);
return stream->presentationTimeOffset;
}
GstClockTime
gst_mpd_parser_get_period_start_time (GstMpdClient * client)
{
GstStreamPeriod *stream_period = NULL;
g_return_val_if_fail (client != NULL, 0);
stream_period = gst_mpdparser_get_stream_period (client);
g_return_val_if_fail (stream_period != NULL, 0);
return stream_period->start;
}
/**
* gst_mpd_client_get_utc_timing_sources:
* @client: #GstMpdClient to check for UTCTiming elements
* @methods: A bit mask of #GstMPDUTCTimingType that specifies the methods
* to search for.
* @selected_method: (nullable): The selected method
* Returns: (transfer none): A NULL terminated array of URLs of servers
* that use @selected_method to provide a realtime clock.
*
* Searches the UTCTiming elements found in the manifest for an element
* that uses one of the UTC timing methods specified in @selected_method.
* If multiple UTCTiming elements are present that support one of the
* methods specified in @selected_method, the first one is returned.
*
* Since: 1.6
*/
gchar **
gst_mpd_client_get_utc_timing_sources (GstMpdClient * client,
guint methods, GstMPDUTCTimingType * selected_method)
{
GList *list;
g_return_val_if_fail (client != NULL, NULL);
g_return_val_if_fail (client->mpd_node != NULL, NULL);
for (list = g_list_first (client->mpd_node->UTCTiming); list;
list = g_list_next (list)) {
const GstUTCTimingNode *node = (const GstUTCTimingNode *) list->data;
if (node->method & methods) {
if (selected_method) {
*selected_method = node->method;
}
return node->urls;
}
}
return NULL;
}
gboolean
gst_mpd_client_get_next_fragment (GstMpdClient * client,
guint indexStream, GstMediaFragmentInfo * fragment)
{
GstActiveStream *stream = NULL;
GstMediaSegment *currentChunk;
gchar *mediaURL = NULL;
gchar *indexURL = NULL;
GstUri *base_url, *frag_url;
/* select stream */
g_return_val_if_fail (client != NULL, FALSE);
g_return_val_if_fail (client->active_streams != NULL, FALSE);
stream = g_list_nth_data (client->active_streams, indexStream);
g_return_val_if_fail (stream != NULL, FALSE);
g_return_val_if_fail (stream->cur_representation != NULL, FALSE);
if (stream->segments) {
GST_DEBUG ("Looking for fragment sequence chunk %d / %d",
stream->segment_index, stream->segments->len);
if (stream->segment_index >= stream->segments->len)
return FALSE;
} else {
GstClockTime duration = gst_mpd_client_get_segment_duration (client,
stream, NULL);
guint segments_count = gst_mpd_client_get_segments_counts (client, stream);
g_return_val_if_fail (stream->cur_seg_template->
MultSegBaseType->SegmentTimeline == NULL, FALSE);
if (!GST_CLOCK_TIME_IS_VALID (duration) || (segments_count > 0
&& stream->segment_index >= segments_count)) {
return FALSE;
}
fragment->duration = duration;
}
/* FIXME rework discont checking */
/* fragment->discontinuity = segment_idx != currentChunk.number; */
fragment->range_start = 0;
fragment->range_end = -1;
fragment->index_uri = NULL;
fragment->index_range_start = 0;
fragment->index_range_end = -1;
if (stream->segments) {
currentChunk = g_ptr_array_index (stream->segments, stream->segment_index);
GST_DEBUG ("currentChunk->SegmentURL = %p", currentChunk->SegmentURL);
if (currentChunk->SegmentURL != NULL) {
mediaURL =
g_strdup (gst_mpdparser_get_mediaURL (stream,
currentChunk->SegmentURL));
indexURL = g_strdup (currentChunk->SegmentURL->index);
} else if (stream->cur_seg_template != NULL) {
mediaURL =
gst_mpdparser_build_URL_from_template (stream->
cur_seg_template->media, stream->cur_representation->id,
currentChunk->number + stream->segment_repeat_index,
stream->cur_representation->bandwidth,
currentChunk->scale_start +
stream->segment_repeat_index * currentChunk->scale_duration);
if (stream->cur_seg_template->index) {
indexURL =
gst_mpdparser_build_URL_from_template (stream->
cur_seg_template->index, stream->cur_representation->id,
currentChunk->number + stream->segment_repeat_index,
stream->cur_representation->bandwidth,
currentChunk->scale_start +
stream->segment_repeat_index * currentChunk->scale_duration);
}
}
GST_DEBUG ("mediaURL = %s", mediaURL);
GST_DEBUG ("indexURL = %s", indexURL);
fragment->timestamp =
currentChunk->start +
stream->segment_repeat_index * currentChunk->duration;
fragment->duration = currentChunk->duration;
if (currentChunk->SegmentURL) {
if (currentChunk->SegmentURL->mediaRange) {
fragment->range_start =
currentChunk->SegmentURL->mediaRange->first_byte_pos;
fragment->range_end =
currentChunk->SegmentURL->mediaRange->last_byte_pos;
}
if (currentChunk->SegmentURL->indexRange) {
fragment->index_range_start =
currentChunk->SegmentURL->indexRange->first_byte_pos;
fragment->index_range_end =
currentChunk->SegmentURL->indexRange->last_byte_pos;
}
}
} else {
if (stream->cur_seg_template != NULL) {
mediaURL =
gst_mpdparser_build_URL_from_template (stream->
cur_seg_template->media, stream->cur_representation->id,
stream->segment_index +
stream->cur_seg_template->MultSegBaseType->startNumber,
stream->cur_representation->bandwidth,
stream->segment_index * fragment->duration);
if (stream->cur_seg_template->index) {
indexURL =
gst_mpdparser_build_URL_from_template (stream->
cur_seg_template->index, stream->cur_representation->id,
stream->segment_index +
stream->cur_seg_template->MultSegBaseType->startNumber,
stream->cur_representation->bandwidth,
stream->segment_index * fragment->duration);
}
} else {
return FALSE;
}
GST_DEBUG ("mediaURL = %s", mediaURL);
GST_DEBUG ("indexURL = %s", indexURL);
fragment->timestamp = stream->segment_index * fragment->duration;
}
base_url = gst_uri_from_string (stream->baseURL);
frag_url = gst_uri_from_string_with_base (base_url, mediaURL);
g_free (mediaURL);
if (stream->queryURL) {
frag_url = gst_uri_make_writable (frag_url);
gst_uri_set_query_string (frag_url, stream->queryURL);
}
fragment->uri = gst_uri_to_string (frag_url);
gst_uri_unref (frag_url);
if (indexURL != NULL) {
frag_url = gst_uri_make_writable (gst_uri_from_string_with_base (base_url,
indexURL));
gst_uri_set_query_string (frag_url, stream->queryURL);
fragment->index_uri = gst_uri_to_string (frag_url);
gst_uri_unref (frag_url);
g_free (indexURL);
} else if (indexURL == NULL && (fragment->index_range_start
|| fragment->index_range_end != -1)) {
/* index has no specific URL but has a range, we should only use this if
* the media also has a range, otherwise we are serving some data twice
* (in the media fragment and again in the index) */
if (!(fragment->range_start || fragment->range_end != -1)) {
GST_WARNING ("Ignoring index ranges because there isn't a media range "
"and URIs would be the same");
/* removing index information */
fragment->index_range_start = 0;
fragment->index_range_end = -1;
}
}
gst_uri_unref (base_url);
GST_DEBUG ("Loading chunk with URL %s", fragment->uri);
return TRUE;
}
gboolean
gst_mpd_client_has_next_segment (GstMpdClient * client,
GstActiveStream * stream, gboolean forward)
{
if (forward) {
guint segments_count = gst_mpd_client_get_segments_counts (client, stream);
if (segments_count > 0 && stream->segments
&& stream->segment_index + 1 == segments_count) {
GstMediaSegment *segment;
segment = g_ptr_array_index (stream->segments, stream->segment_index);
if (segment->repeat >= 0
&& stream->segment_repeat_index >= segment->repeat)
return FALSE;
} else if (segments_count > 0
&& stream->segment_index + 1 >= segments_count) {
return FALSE;
}
} else {
if (stream->segment_index < 0)
return FALSE;
}
return TRUE;
}
GstFlowReturn
gst_mpd_client_advance_segment (GstMpdClient * client, GstActiveStream * stream,
gboolean forward)
{
GstMediaSegment *segment;
GstFlowReturn ret = GST_FLOW_OK;
guint segments_count = gst_mpd_client_get_segments_counts (client, stream);
GST_DEBUG ("Advancing segment. Current: %d / %d r:%d", stream->segment_index,
segments_count, stream->segment_repeat_index);
/* handle special cases first */
if (forward) {
if (segments_count > 0 && stream->segment_index >= segments_count) {
ret = GST_FLOW_EOS;
goto done;
}
if (stream->segments == NULL) {
if (stream->segment_index < 0) {
stream->segment_index = 0;
} else {
stream->segment_index++;
if (segments_count > 0 && stream->segment_index >= segments_count) {
ret = GST_FLOW_EOS;
}
}
goto done;
}
/* special case for when playback direction is reverted right at *
* the end of the segment list */
if (stream->segment_index < 0) {
stream->segment_index = 0;
goto done;
}
} else {
if (stream->segments == NULL)
stream->segment_index--;
if (stream->segment_index < 0) {
stream->segment_index = -1;
ret = GST_FLOW_EOS;
goto done;
}
if (stream->segments == NULL)
goto done;
/* special case for when playback direction is reverted right at *
* the end of the segment list */
if (stream->segment_index >= segments_count) {
stream->segment_index = segments_count - 1;
segment = g_ptr_array_index (stream->segments, stream->segment_index);
if (segment->repeat >= 0) {
stream->segment_repeat_index = segment->repeat;
} else {
GstClockTime start = segment->start;
GstClockTime end =
gst_mpdparser_get_segment_end_time (client, stream->segments,
segment,
stream->segment_index);
stream->segment_repeat_index =
(guint) (end - start) / segment->duration;
}
goto done;
}
}
/* for the normal cases we can get the segment safely here */
segment = g_ptr_array_index (stream->segments, stream->segment_index);
if (forward) {
if (segment->repeat >= 0 && stream->segment_repeat_index >= segment->repeat) {
stream->segment_repeat_index = 0;
stream->segment_index++;
if (segments_count > 0 && stream->segment_index >= segments_count) {
ret = GST_FLOW_EOS;
goto done;
}
} else {
stream->segment_repeat_index++;
}
} else {
if (stream->segment_repeat_index == 0) {
stream->segment_index--;
if (stream->segment_index < 0) {
ret = GST_FLOW_EOS;
goto done;
}
segment = g_ptr_array_index (stream->segments, stream->segment_index);
/* negative repeats only seem to make sense at the end of a list,
* so this one will probably not be. Needs some sanity checking
* when loading the XML data. */
if (segment->repeat >= 0) {
stream->segment_repeat_index = segment->repeat;
} else {
GstClockTime start = segment->start;
GstClockTime end =
gst_mpdparser_get_segment_end_time (client, stream->segments,
segment,
stream->segment_index);
stream->segment_repeat_index =
(guint) (end - start) / segment->duration;
}
} else {
stream->segment_repeat_index--;
}
}
done:
GST_DEBUG ("Advanced to segment: %d / %d r:%d (ret: %s)",
stream->segment_index, segments_count,
stream->segment_repeat_index, gst_flow_get_name (ret));
return ret;
}
gboolean
gst_mpd_client_get_next_header (GstMpdClient * client, gchar ** uri,
guint stream_idx, gint64 * range_start, gint64 * range_end)
{
GstActiveStream *stream;
GstStreamPeriod *stream_period;
stream = gst_mpdparser_get_active_stream_by_index (client, stream_idx);
g_return_val_if_fail (stream != NULL, FALSE);
g_return_val_if_fail (stream->cur_representation != NULL, FALSE);
stream_period = gst_mpdparser_get_stream_period (client);
g_return_val_if_fail (stream_period != NULL, FALSE);
g_return_val_if_fail (stream_period->period != NULL, FALSE);
*range_start = 0;
*range_end = -1;
GST_DEBUG ("Looking for current representation header");
*uri = NULL;
if (stream->cur_segment_base) {
if (stream->cur_segment_base->Initialization) {
*uri =
g_strdup (gst_mpdparser_get_initializationURL (stream,
stream->cur_segment_base->Initialization));
if (stream->cur_segment_base->Initialization->range) {
*range_start =
stream->cur_segment_base->Initialization->range->first_byte_pos;
*range_end =
stream->cur_segment_base->Initialization->range->last_byte_pos;
}
} else if (stream->cur_segment_base->indexRange) {
*uri =
g_strdup (gst_mpdparser_get_initializationURL (stream,
stream->cur_segment_base->Initialization));
*range_start = 0;
*range_end = stream->cur_segment_base->indexRange->first_byte_pos - 1;
}
} else if (stream->cur_seg_template
&& stream->cur_seg_template->initialization) {
*uri =
gst_mpdparser_build_URL_from_template (stream->
cur_seg_template->initialization, stream->cur_representation->id, 0,
stream->cur_representation->bandwidth, 0);
}
return *uri == NULL ? FALSE : TRUE;
}
gboolean
gst_mpd_client_get_next_header_index (GstMpdClient * client, gchar ** uri,
guint stream_idx, gint64 * range_start, gint64 * range_end)
{
GstActiveStream *stream;
GstStreamPeriod *stream_period;
stream = gst_mpdparser_get_active_stream_by_index (client, stream_idx);
g_return_val_if_fail (stream != NULL, FALSE);
g_return_val_if_fail (stream->cur_representation != NULL, FALSE);
stream_period = gst_mpdparser_get_stream_period (client);
g_return_val_if_fail (stream_period != NULL, FALSE);
g_return_val_if_fail (stream_period->period != NULL, FALSE);
*range_start = 0;
*range_end = -1;
GST_DEBUG ("Looking for current representation index");
*uri = NULL;
if (stream->cur_segment_base && stream->cur_segment_base->indexRange) {
*uri =
g_strdup (gst_mpdparser_get_initializationURL (stream,
stream->cur_segment_base->Initialization));
*range_start = stream->cur_segment_base->indexRange->first_byte_pos;
*range_end = stream->cur_segment_base->indexRange->last_byte_pos;
} else if (stream->cur_seg_template && stream->cur_seg_template->index) {
*uri =
gst_mpdparser_build_URL_from_template (stream->cur_seg_template->index,
stream->cur_representation->id, 0,
stream->cur_representation->bandwidth, 0);
}
return *uri == NULL ? FALSE : TRUE;
}
GstClockTime
gst_mpd_client_get_next_fragment_duration (GstMpdClient * client,
GstActiveStream * stream)
{
GstMediaSegment *media_segment = NULL;
gint seg_idx;
g_return_val_if_fail (stream != NULL, 0);
seg_idx = stream->segment_index;
if (stream->segments) {
if (seg_idx < stream->segments->len && seg_idx >= 0)
media_segment = g_ptr_array_index (stream->segments, seg_idx);
return media_segment == NULL ? 0 : media_segment->duration;
} else {
GstClockTime duration =
gst_mpd_client_get_segment_duration (client, stream, NULL);
guint segments_count = gst_mpd_client_get_segments_counts (client, stream);
g_return_val_if_fail (stream->cur_seg_template->MultSegBaseType->
SegmentTimeline == NULL, 0);
if (!GST_CLOCK_TIME_IS_VALID (duration) || (segments_count > 0
&& seg_idx >= segments_count)) {
return 0;
}
return duration;
}
}
GstClockTime
gst_mpd_client_get_media_presentation_duration (GstMpdClient * client)
{
GstClockTime duration;
g_return_val_if_fail (client != NULL, GST_CLOCK_TIME_NONE);
if (client->mpd_node->mediaPresentationDuration != -1) {
duration = client->mpd_node->mediaPresentationDuration * GST_MSECOND;
} else {
/* We can only get the duration for on-demand streams */
duration = GST_CLOCK_TIME_NONE;
}
return duration;
}
gboolean
gst_mpd_client_set_period_id (GstMpdClient * client, const gchar * period_id)
{
GstStreamPeriod *next_stream_period;
gboolean ret = FALSE;
GList *iter;
guint period_idx;
g_return_val_if_fail (client != NULL, FALSE);
g_return_val_if_fail (client->periods != NULL, FALSE);
g_return_val_if_fail (period_id != NULL, FALSE);
if (!gst_mpd_client_setup_media_presentation (client, GST_CLOCK_TIME_NONE, -1,
period_id))
return FALSE;
for (period_idx = 0, iter = client->periods; iter;
period_idx++, iter = g_list_next (iter)) {
next_stream_period = iter->data;
if (next_stream_period->period->id
&& strcmp (next_stream_period->period->id, period_id) == 0) {
ret = TRUE;
client->period_idx = period_idx;
break;
}
}
return ret;
}
gboolean
gst_mpd_client_set_period_index (GstMpdClient * client, guint period_idx)
{
GstStreamPeriod *next_stream_period;
gboolean ret = FALSE;
g_return_val_if_fail (client != NULL, FALSE);
g_return_val_if_fail (client->periods != NULL, FALSE);
if (!gst_mpd_client_setup_media_presentation (client, -1, period_idx, NULL))
return FALSE;
next_stream_period = g_list_nth_data (client->periods, period_idx);
if (next_stream_period != NULL) {
client->period_idx = period_idx;
ret = TRUE;
}
return ret;
}
guint
gst_mpd_client_get_period_index (GstMpdClient * client)
{
guint period_idx;
g_return_val_if_fail (client != NULL, 0);
period_idx = client->period_idx;
return period_idx;
}
const gchar *
gst_mpd_client_get_period_id (GstMpdClient * client)
{
GstStreamPeriod *period;
gchar *period_id = NULL;
g_return_val_if_fail (client != NULL, 0);
period = g_list_nth_data (client->periods, client->period_idx);
if (period && period->period)
period_id = period->period->id;
return period_id;
}
gboolean
gst_mpd_client_has_previous_period (GstMpdClient * client)
{
GList *next_stream_period;
g_return_val_if_fail (client != NULL, FALSE);
g_return_val_if_fail (client->periods != NULL, FALSE);
if (!gst_mpd_client_setup_media_presentation (client, GST_CLOCK_TIME_NONE,
client->period_idx - 1, NULL))
return FALSE;
next_stream_period =
g_list_nth_data (client->periods, client->period_idx - 1);
return next_stream_period != NULL;
}
gboolean
gst_mpd_client_has_next_period (GstMpdClient * client)
{
GList *next_stream_period;
g_return_val_if_fail (client != NULL, FALSE);
g_return_val_if_fail (client->periods != NULL, FALSE);
if (!gst_mpd_client_setup_media_presentation (client, GST_CLOCK_TIME_NONE,
client->period_idx + 1, NULL))
return FALSE;
next_stream_period =
g_list_nth_data (client->periods, client->period_idx + 1);
return next_stream_period != NULL;
}
void
gst_mpd_client_seek_to_first_segment (GstMpdClient * client)
{
GList *list;
g_return_if_fail (client != NULL);
g_return_if_fail (client->active_streams != NULL);
for (list = g_list_first (client->active_streams); list;
list = g_list_next (list)) {
GstActiveStream *stream = (GstActiveStream *) list->data;
if (stream) {
stream->segment_index = 0;
stream->segment_repeat_index = 0;
}
}
}
static guint
gst_mpd_client_get_segments_counts (GstMpdClient * client,
GstActiveStream * stream)
{
GstStreamPeriod *stream_period;
g_return_val_if_fail (stream != NULL, 0);
if (stream->segments)
return stream->segments->len;
g_return_val_if_fail (stream->cur_seg_template->MultSegBaseType->
SegmentTimeline == NULL, 0);
stream_period = gst_mpdparser_get_stream_period (client);
if (stream_period->duration != -1)
return gst_util_uint64_scale_ceil (stream_period->duration, 1,
gst_mpd_client_get_segment_duration (client, stream, NULL));
return 0;
}
gboolean
gst_mpd_client_is_live (GstMpdClient * client)
{
g_return_val_if_fail (client != NULL, FALSE);
g_return_val_if_fail (client->mpd_node != NULL, FALSE);
return client->mpd_node->type == GST_MPD_FILE_TYPE_DYNAMIC;
}
guint
gst_mpdparser_get_nb_active_stream (GstMpdClient * client)
{
g_return_val_if_fail (client != NULL, 0);
return g_list_length (client->active_streams);
}
guint
gst_mpdparser_get_nb_adaptationSet (GstMpdClient * client)
{
GstStreamPeriod *stream_period;
stream_period = gst_mpdparser_get_stream_period (client);
g_return_val_if_fail (stream_period != NULL, 0);
g_return_val_if_fail (stream_period->period != NULL, 0);
return g_list_length (stream_period->period->AdaptationSets);
}
GstActiveStream *
gst_mpdparser_get_active_stream_by_index (GstMpdClient * client,
guint stream_idx)
{
g_return_val_if_fail (client != NULL, NULL);
g_return_val_if_fail (client->active_streams != NULL, NULL);
return g_list_nth_data (client->active_streams, stream_idx);
}
gboolean
gst_mpd_client_active_stream_contains_subtitles (GstActiveStream * stream)
{
const gchar *mimeType;
const gchar *adapt_set_codecs;
const gchar *rep_codecs;
mimeType = stream->cur_representation->RepresentationBase->mimeType;
if (!mimeType)
mimeType = stream->cur_adapt_set->RepresentationBase->mimeType;
if (g_strcmp0 (mimeType, "application/ttml+xml") == 0)
return TRUE;
adapt_set_codecs = stream->cur_adapt_set->RepresentationBase->codecs;
rep_codecs = stream->cur_representation->RepresentationBase->codecs;
return (adapt_set_codecs && g_str_has_prefix (adapt_set_codecs, "stpp"))
|| (rep_codecs && g_str_has_prefix (rep_codecs, "stpp"));
}
static const gchar *
gst_mpdparser_mimetype_to_caps (const gchar * mimeType)
{
if (mimeType == NULL)
return NULL;
if (strcmp (mimeType, "video/mp2t") == 0) {
return "video/mpegts, systemstream=(bool) true";
} else if (strcmp (mimeType, "video/mp4") == 0) {
return "video/quicktime";
} else if (strcmp (mimeType, "audio/mp4") == 0) {
return "audio/x-m4a";
} else
return mimeType;
}
GstCaps *
gst_mpd_client_get_stream_caps (GstActiveStream * stream)
{
const gchar *mimeType, *caps_string;
GstCaps *ret = NULL;
if (stream == NULL || stream->cur_adapt_set == NULL
|| stream->cur_representation == NULL)
return NULL;
mimeType = stream->cur_representation->RepresentationBase->mimeType;
if (mimeType == NULL) {
mimeType = stream->cur_adapt_set->RepresentationBase->mimeType;
}
caps_string = gst_mpdparser_mimetype_to_caps (mimeType);
if ((g_strcmp0 (caps_string, "application/mp4") == 0)
&& gst_mpd_client_active_stream_contains_subtitles (stream))
caps_string = "video/quicktime";
if (caps_string)
ret = gst_caps_from_string (caps_string);
return ret;
}
gboolean
gst_mpd_client_get_bitstream_switching_flag (GstActiveStream * stream)
{
if (stream == NULL || stream->cur_adapt_set == NULL)
return FALSE;
return stream->cur_adapt_set->bitstreamSwitching;
}
guint
gst_mpd_client_get_video_stream_width (GstActiveStream * stream)
{
guint width;
if (stream == NULL || stream->cur_adapt_set == NULL
|| stream->cur_representation == NULL)
return 0;
width = stream->cur_representation->RepresentationBase->width;
if (width == 0) {
width = stream->cur_adapt_set->RepresentationBase->width;
}
return width;
}
guint
gst_mpd_client_get_video_stream_height (GstActiveStream * stream)
{
guint height;
if (stream == NULL || stream->cur_adapt_set == NULL
|| stream->cur_representation == NULL)
return 0;
height = stream->cur_representation->RepresentationBase->height;
if (height == 0) {
height = stream->cur_adapt_set->RepresentationBase->height;
}
return height;
}
guint
gst_mpd_client_get_audio_stream_rate (GstActiveStream * stream)
{
const gchar *rate;
if (stream == NULL || stream->cur_adapt_set == NULL
|| stream->cur_representation == NULL)
return 0;
rate = stream->cur_representation->RepresentationBase->audioSamplingRate;
if (rate == NULL) {
rate = stream->cur_adapt_set->RepresentationBase->audioSamplingRate;
}
return rate ? atoi (rate) : 0;
}
guint
gst_mpd_client_get_audio_stream_num_channels (GstActiveStream * stream)
{
if (stream == NULL || stream->cur_adapt_set == NULL
|| stream->cur_representation == NULL)
return 0;
/* TODO: here we have to parse the AudioChannelConfiguration descriptors */
return 0;
}
guint
gst_mpdparser_get_list_and_nb_of_audio_language (GstMpdClient * client,
GList ** lang)
{
GstStreamPeriod *stream_period;
GstAdaptationSetNode *adapt_set;
GList *adaptation_sets, *list;
const gchar *this_mimeType = "audio";
gchar *mimeType = NULL;
guint nb_adaptation_set = 0;
stream_period = gst_mpdparser_get_stream_period (client);
g_return_val_if_fail (stream_period != NULL, 0);
g_return_val_if_fail (stream_period->period != NULL, 0);
adaptation_sets =
gst_mpd_client_get_adaptation_sets_for_period (client, stream_period);
for (list = adaptation_sets; list; list = g_list_next (list)) {
adapt_set = (GstAdaptationSetNode *) list->data;
if (adapt_set && adapt_set->lang) {
gchar *this_lang = adapt_set->lang;
GstRepresentationNode *rep;
rep =
gst_mpdparser_get_lowest_representation (adapt_set->Representations);
mimeType = NULL;
if (rep->RepresentationBase)
mimeType = rep->RepresentationBase->mimeType;
if (!mimeType && adapt_set->RepresentationBase) {
mimeType = adapt_set->RepresentationBase->mimeType;
}
if (strncmp_ext (mimeType, this_mimeType) == 0) {
nb_adaptation_set++;
*lang = g_list_append (*lang, this_lang);
}
}
}
return nb_adaptation_set;
}
GstDateTime *
gst_mpd_client_get_next_segment_availability_end_time (GstMpdClient * client,
GstActiveStream * stream)
{
GstDateTime *availability_start_time, *rv;
gint seg_idx;
GstClockTime seg_duration;
gint64 offset;
GstStreamPeriod *stream_period;
g_return_val_if_fail (client != NULL, NULL);
g_return_val_if_fail (stream != NULL, NULL);
stream_period = gst_mpdparser_get_stream_period (client);
seg_idx = stream->segment_index;
seg_duration = gst_mpd_client_get_segment_duration (client, stream, NULL);
if (seg_duration == 0)
return NULL;
availability_start_time = gst_mpd_client_get_availability_start_time (client);
if (availability_start_time == NULL)
return (GstDateTime *) NULL;
if (stream_period && stream_period->period) {
GstDateTime *t =
gst_mpd_client_add_time_difference (availability_start_time,
stream_period->start / 1000);
gst_date_time_unref (availability_start_time);
availability_start_time = t;
if (availability_start_time == NULL) {
GST_WARNING_OBJECT (client, "Failed to offset availability_start_time");
return NULL;
}
}
offset = (1 + seg_idx) * seg_duration;
rv = gst_mpd_client_add_time_difference (availability_start_time,
offset / GST_USECOND);
gst_date_time_unref (availability_start_time);
return rv;
}
gint
gst_mpd_client_check_time_position (GstMpdClient * client,
GstActiveStream * stream, GstClockTime ts, gint64 * diff)
{
GDateTime *now = g_date_time_new_now_utc ();
GDateTime *start =
gst_date_time_to_g_date_time (client->mpd_node->availabilityStartTime);
GTimeSpan stream_now;
GTimeSpan ts_microseconds;
GstClockTime duration;
g_return_val_if_fail (gst_mpd_client_is_live (client), 0);
duration = gst_mpd_client_get_segment_duration (client, stream, NULL);
stream_now = g_date_time_difference (now, start);
g_date_time_unref (now);
g_date_time_unref (start);
/* sum duration to check if the segment is fully ready */
ts_microseconds = (ts + duration) / GST_USECOND;
/*
* This functions checks if a given ts is in the 'available range' of
* a DASH presentation. This only makes sense for live streams, which
* are continuously adding new segments and removing old ones.
*
* Note: Both the client and the server should use UTC as a time reference.
*
* @ts is the time since the beginning of the stream and we need to find out
* if it is currently available. The server should be hosting segments
*
* * ---------------- ... --- * ----------- * ---- ...
* |
* | past(unavailable) | | available | future(unavailable yet)
* |
* * ---------------- ... --- * ----------- * ---- ...
* | | |
* availabilitStartTime | UTC now
* UTC now - timeShiftBufferDepth
*
* This function should return 0 if @ts is in the 'available' area, 1 for
* 'future' and '-1' for past and the corresponding distance to the
* 'available' area is set to @diff
*
* TODO untested with live presentations with multiple periods as no
* examples for it could be found/generated
*/
if (ts_microseconds > stream_now) {
*diff = ts_microseconds - stream_now;
return 1;
}
if (client->mpd_node->timeShiftBufferDepth != -1
&& ts_microseconds <
stream_now - client->mpd_node->timeShiftBufferDepth) {
*diff = ts_microseconds - stream_now;
return -1;
}
*diff = 0;
return 0;
}
gboolean
gst_mpd_client_seek_to_time (GstMpdClient * client, GDateTime * time)
{
GDateTime *start =
gst_date_time_to_g_date_time (client->mpd_node->availabilityStartTime);
GTimeSpan ts_microseconds;
GstClockTime ts;
gboolean ret = TRUE;
GList *stream;
g_return_val_if_fail (gst_mpd_client_is_live (client), 0);
ts_microseconds = g_date_time_difference (time, start);
g_date_time_unref (start);
/* Clamp to availability start time, otherwise calculations wrap around */
if (ts_microseconds < 0)
ts_microseconds = 0;
ts = ts_microseconds * GST_USECOND;
for (stream = client->active_streams; stream; stream = g_list_next (stream)) {
ret = ret & gst_mpd_client_stream_seek (client, stream->data, ts);
}
return ret;
}
void
gst_media_fragment_info_clear (GstMediaFragmentInfo * fragment)
{
g_free (fragment->uri);
g_free (fragment->index_uri);
}
gboolean
gst_mpd_client_has_isoff_ondemand_profile (GstMpdClient * client)
{
return client->profile_isoff_ondemand;
}
/**
* gst_mpd_client_parse_default_presentation_delay:
* @client: #GstMpdClient that has a parsed manifest
* @default_presentation_delay: A string that specifies a time period
* in fragments (e.g. "5 f"), seconds ("12 s") or milliseconds
* ("12000 ms")
* Returns: the parsed string in milliseconds
*
* Since: 1.6
*/
gint64
gst_mpd_client_parse_default_presentation_delay (GstMpdClient * client,
const gchar * default_presentation_delay)
{
gint64 value;
char *endptr = NULL;
g_return_val_if_fail (client != NULL, 0);
g_return_val_if_fail (default_presentation_delay != NULL, 0);
value = strtol (default_presentation_delay, &endptr, 10);
if (endptr == default_presentation_delay || value == 0) {
return 0;
}
while (*endptr == ' ')
endptr++;
if (*endptr == 's' || *endptr == 'S') {
value *= 1000; /* convert to ms */
} else if (*endptr == 'f' || *endptr == 'F') {
gint64 segment_duration;
g_assert (client->mpd_node != NULL);
segment_duration = client->mpd_node->maxSegmentDuration;
value *= segment_duration;
} else if (*endptr != 'm' && *endptr != 'M') {
GST_ERROR ("Unable to parse default presentation delay: %s",
default_presentation_delay);
value = 0;
}
return value;
}
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