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gstreamer/ext/dash/gstmpdparser.c
George Kiagiadakis ea90ceac01 dashdemux: support downloading segments in reverse order 
When a seek with a negative rate is requested, find the target
segment where gstsegment.stop belongs in and then download from
this segment backwards until the first segment.

This allows proper reverse playback.
2014-08-07 16:52:37 +03:00

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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_string (xmlNode * a_node,
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_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, gint64 default_value, gint64 * 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);
/* 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 void gst_mpdparser_parse_mult_seg_base_type_ext (GstMultSegmentBaseType
** pointer, xmlNode * a_node, GstMultSegmentBaseType * parent);
static void 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 void gst_mpdparser_parse_representation_node (GList ** list,
xmlNode * a_node, GstAdaptationSetNode * parent);
static void 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 void gst_mpdparser_parse_segment_template_node (GstSegmentTemplateNode **
pointer, xmlNode * a_node, GstSegmentTemplateNode * parent);
static void 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 void gst_mpdparser_parse_root_node (GstMPDNode ** pointer,
xmlNode * a_node);
/* Helper functions */
static gint convert_to_millisecs (gint 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, guint64 start,
GstClockTime start_time, 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);
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 (GstPeriodNode *
Period, GstAdaptationSetNode * AdaptationSet,
GstRepresentationNode * Representation);
/* Segments */
static guint gst_mpd_client_get_segments_counts (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_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);
/* functions to parse node namespaces, content and properties */
static gboolean
gst_mpdparser_get_xml_prop_string (xmlNode * a_node,
const gchar * property_name, gchar ** property_value)
{
xmlChar *prop_string;
gboolean exists = FALSE;
prop_string = xmlGetProp (a_node, (const xmlChar *) property_name);
if (prop_string) {
*property_value = (gchar *) prop_string;
exists = TRUE;
GST_LOG (" - %s: %s", property_name, prop_string);
}
return exists;
}
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_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)) {
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);
}
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)) {
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);
}
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])) {
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]);
}
}
*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)) {
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)
&& 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 = 0;
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) {
if (sscanf (str, "%" G_GUINT64_FORMAT, &first_byte_pos) != 1) {
goto error;
}
}
/* read last_byte_pos */
if (pos < (len - 1)) {
if (sscanf (str + pos + 1, "%" G_GUINT64_FORMAT, &last_byte_pos) != 1) {
goto error;
}
}
/* malloc return data structure */
*property_value = g_slice_new0 (GstRange);
if (*property_value == NULL) {
GST_WARNING ("Allocation of GstRange failed!");
goto error;
}
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:
xmlFree (prop_string);
GST_WARNING ("failed to parse property %s from xml string %s", property_name,
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;
}
/* 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);
if (*property_value == NULL) {
GST_WARNING ("Allocation of GstRatio failed!");
goto error;
}
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:
xmlFree (prop_string);
GST_WARNING ("failed to parse property %s from xml string %s", property_name,
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);
/* 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);
if (*property_value == NULL) {
GST_WARNING ("Allocation of GstFrameRate failed!");
goto error;
}
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:
xmlFree (prop_string);
GST_WARNING ("failed to parse property %s from xml string %s", property_name,
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)
goto error;
}
/* alloc return data structure */
*property_value = g_slice_new0 (GstConditionalUintType);
if (*property_value == NULL) {
GST_WARNING ("Allocation of GstConditionalUintType failed!");
goto error;
}
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:
xmlFree (prop_string);
GST_WARNING ("failed to parse property %s from xml string %s", property_name,
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)
goto error;
pos = strcspn (str, "-");
str += (pos + 1);
GST_TRACE (" - year %d", year);
/* parse month */
ret = sscanf (str, "%d", &month);
if (ret != 1)
goto error;
pos = strcspn (str, "-");
str += (pos + 1);
GST_TRACE (" - month %d", month);
/* parse day */
ret = sscanf (str, "%d", &day);
if (ret != 1)
goto error;
pos = strcspn (str, "T");
str += (pos + 1);
GST_TRACE (" - day %d", day);
/* parse hour */
ret = sscanf (str, "%d", &hour);
if (ret != 1)
goto error;
pos = strcspn (str, ":");
str += (pos + 1);
GST_TRACE (" - hour %d", hour);
/* parse minute */
ret = sscanf (str, "%d", &minute);
if (ret != 1)
goto error;
pos = strcspn (str, ":");
str += (pos + 1);
GST_TRACE (" - minute %d", minute);
/* parse second */
ret = sscanf (str, "%d", &second);
if (ret != 1)
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:
xmlFree (prop_string);
GST_WARNING ("failed to parse property %s from xml string %s", property_name,
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 gint
convert_to_millisecs (gint decimals, gint pos)
{
gint num = 1, den = 1, 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
gst_mpdparser_get_xml_prop_duration (xmlNode * a_node,
const gchar * property_name, gint64 default_value, gint64 * property_value)
{
xmlChar *prop_string;
gchar *str;
gint ret, read, len, pos, posT;
gint years = 0, months = 0, days = 0, hours = 0, minutes = 0, seconds =
0, decimals = 0;
gint sign = 1;
gboolean have_ms = FALSE;
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 ("duration: %s, len %d", str, len);
/* read "-" for sign, if present */
pos = strcspn (str, "-");
if (pos < len) { /* found "-" */
if (pos != 0) {
GST_WARNING ("sign \"-\" non at the beginning of the string");
goto error;
}
GST_TRACE ("found - sign at the beginning");
sign = -1;
str++;
len--;
}
/* read "P" for period */
pos = strcspn (str, "P");
if (pos != 0) {
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, "%d", &read);
if (ret != 1) {
GST_WARNING ("can not read integer value from string %s!", str);
goto error;
}
switch (str[pos]) {
case 'Y':
years = read;
break;
case 'M':
months = read;
break;
case 'D':
days = read;
break;
default:
GST_WARNING ("unexpected char %c!", str[pos]);
goto error;
break;
}
GST_TRACE ("read number %d type %c", read, str[pos]);
str += (pos + 1);
posT -= (pos + 1);
} while (posT > 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, cents of second */
do {
GST_TRACE ("parsing substring %s", str);
pos = strcspn (str, "HMS,.");
ret = sscanf (str, "%d", &read);
if (ret != 1) {
GST_WARNING ("can not read integer value from string %s!", str);
goto error;
}
switch (str[pos]) {
case 'H':
hours = read;
break;
case 'M':
minutes = read;
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 %d (%d digits) -> %d ms", read, pos,
decimals);
} else {
/* no decimals */
seconds = read;
}
break;
case '.':
case ',':
/* we have read the integer part of a decimal number in seconds */
seconds = read;
have_ms = TRUE;
break;
default:
GST_WARNING ("unexpected char %c!", str[pos]);
goto error;
break;
}
GST_TRACE ("read number %d type %c", read, str[pos]);
str += pos + 1;
len -= (pos + 1);
} while (len > 0);
GST_TRACE ("H:M:S.MS=%d:%d:%d.%03d", hours, minutes, seconds, decimals);
}
xmlFree (prop_string);
exists = TRUE;
*property_value =
sign * ((((((gint64) years * 365 + months * 30 + days) * 24 +
hours) * 60 + minutes) * 60 + seconds) * 1000 + decimals);
GST_LOG (" - %s: %" G_GINT64_FORMAT, property_name, *property_value);
}
if (!exists) {
*property_value = default_value;
}
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 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 */
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);
if (new_base_url == NULL) {
GST_WARNING ("Allocation of BaseURL node failed!");
return;
}
*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);
if (new_descriptor == NULL) {
GST_WARNING ("Allocation of DescriptorType node failed!");
return;
}
*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);
gst_mpdparser_get_xml_prop_string (a_node, "value", &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);
if (new_content_component == NULL) {
GST_WARNING ("Allocation of ContentComponent node failed!");
return;
}
*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);
if (new_subrep == NULL) {
GST_WARNING ("Allocation of SubRepresentation node failed!");
return;
}
*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);
if (clone) {
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);
} else {
GST_WARNING ("Allocation of SegmentURL node failed!");
}
}
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);
if (new_segment_url == NULL) {
GST_WARNING ("Allocation of SegmentURL node failed!");
return;
}
*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);
if (new_url_type == NULL) {
GST_WARNING ("Allocation of URLType node failed!");
return;
}
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;
gboolean boolval;
GstRange *rangeval;
gst_mpdparser_free_seg_base_type_ext (*pointer);
*pointer = seg_base_type = g_slice_new0 (GstSegmentBaseType);
if (seg_base_type == NULL) {
GST_WARNING ("Allocation of SegmentBaseType node failed!");
return;
}
/* Initialize values that have defaults */
seg_base_type->indexRangeExact = FALSE;
/* 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", 0,
&intval)) {
seg_base_type->timescale = intval;
}
if (gst_mpdparser_get_xml_prop_unsigned_integer (a_node,
"presentationTimeOffset", 0, &intval)) {
seg_base_type->presentationTimeOffset = intval;
}
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);
if (clone) {
clone->t = pointer->t;
clone->d = pointer->d;
clone->r = pointer->r;
} else {
GST_WARNING ("Allocation of S node failed!");
}
}
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);
if (new_s_node == NULL) {
GST_WARNING ("Allocation of S node failed!");
return;
}
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_unsigned_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 void
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;
gst_mpdparser_free_mult_seg_base_type_ext (*pointer);
*pointer = mult_seg_base_type = g_slice_new0 (GstMultSegmentBaseType);
if (mult_seg_base_type == NULL) {
GST_WARNING ("Allocation of MultipleSegmentBaseType node failed!");
return;
}
/* 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;
}
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);
} 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);
}
}
}
}
static void
gst_mpdparser_parse_segment_list_node (GstSegmentListNode ** pointer,
xmlNode * a_node, GstSegmentListNode * parent)
{
xmlNode *cur_node;
GstSegmentListNode *new_segment_list;
gst_mpdparser_free_segment_list_node (*pointer);
*pointer = new_segment_list = g_slice_new0 (GstSegmentListNode);
if (new_segment_list == NULL) {
GST_WARNING ("Allocation of SegmentList node failed!");
return;
}
/* 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));
}
}
GST_LOG ("extension of SegmentList node:");
gst_mpdparser_parse_mult_seg_base_type_ext
(&new_segment_list->MultSegBaseType, a_node,
(parent ? parent->MultSegBaseType : 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 *) "SegmentURL") == 0) {
gst_mpdparser_parse_segment_url_node (&new_segment_list->SegmentURL,
cur_node);
}
}
}
}
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);
if (representation_base == NULL) {
GST_WARNING ("Allocation of RepresentationBaseType node failed!");
return;
}
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 void
gst_mpdparser_parse_representation_node (GList ** list, xmlNode * a_node,
GstAdaptationSetNode * parent)
{
xmlNode *cur_node;
GstRepresentationNode *new_representation;
new_representation = g_slice_new0 (GstRepresentationNode);
if (new_representation == NULL) {
GST_WARNING ("Allocation of Representation node failed!");
return;
}
*list = g_list_append (*list, new_representation);
GST_LOG ("attributes of Representation node:");
gst_mpdparser_get_xml_prop_string (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) {
gst_mpdparser_parse_segment_template_node
(&new_representation->SegmentTemplate, cur_node,
parent->SegmentTemplate);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "SegmentList") == 0) {
gst_mpdparser_parse_segment_list_node (&new_representation->SegmentList,
cur_node, parent->SegmentList);
} 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);
}
}
}
}
static void
gst_mpdparser_parse_adaptation_set_node (GList ** list, xmlNode * a_node,
GstPeriodNode * parent)
{
xmlNode *cur_node;
GstAdaptationSetNode *new_adap_set;
new_adap_set = g_slice_new0 (GstAdaptationSetNode);
if (new_adap_set == NULL) {
GST_WARNING ("Allocation of AdaptationSet node failed!");
return;
}
*list = g_list_append (*list, new_adap_set);
GST_LOG ("attributes of AdaptationSet node:");
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_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) {
gst_mpdparser_parse_segment_list_node (&new_adap_set->SegmentList,
cur_node, parent->SegmentList);
} 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) {
gst_mpdparser_parse_segment_template_node
(&new_adap_set->SegmentTemplate, cur_node, parent->SegmentTemplate);
}
}
}
/* 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) {
gst_mpdparser_parse_representation_node (&new_adap_set->Representations,
cur_node, new_adap_set);
}
}
}
}
static void
gst_mpdparser_parse_subset_node (GList ** list, xmlNode * a_node)
{
GstSubsetNode *new_subset;
new_subset = g_slice_new0 (GstSubsetNode);
if (new_subset == NULL) {
GST_WARNING ("Allocation of Subset node failed!");
return;
}
*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 void
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);
*pointer = new_segment_template = g_slice_new0 (GstSegmentTemplateNode);
if (new_segment_template == NULL) {
GST_WARNING ("Allocation of SegmentTemplate node failed!");
return;
}
/* Inherit attribute values from parent */
if (parent) {
new_segment_template->media = xmlMemStrdup (parent->media);
new_segment_template->index = xmlMemStrdup (parent->index);
new_segment_template->initialization =
xmlMemStrdup (parent->initialization);
new_segment_template->bitstreamSwitching =
xmlMemStrdup (parent->bitstreamSwitching);
}
GST_LOG ("extension of SegmentTemplate node:");
gst_mpdparser_parse_mult_seg_base_type_ext
(&new_segment_template->MultSegBaseType, a_node,
(parent ? parent->MultSegBaseType : NULL));
GST_LOG ("attributes of SegmentTemplate node:");
if (gst_mpdparser_get_xml_prop_string (a_node, "media", &strval)) {
new_segment_template->media = strval;
}
if (gst_mpdparser_get_xml_prop_string (a_node, "index", &strval)) {
new_segment_template->index = strval;
}
if (gst_mpdparser_get_xml_prop_string (a_node, "initialization", &strval)) {
new_segment_template->initialization = strval;
}
if (gst_mpdparser_get_xml_prop_string (a_node, "bitstreamSwitching", &strval)) {
new_segment_template->bitstreamSwitching = strval;
}
}
static void
gst_mpdparser_parse_period_node (GList ** list, xmlNode * a_node)
{
xmlNode *cur_node;
GstPeriodNode *new_period;
new_period = g_slice_new0 (GstPeriodNode);
if (new_period == NULL) {
GST_WARNING ("Allocation of Period node failed!");
return;
}
*list = g_list_append (*list, new_period);
new_period->start = GST_CLOCK_TIME_NONE;
GST_LOG ("attributes of Period node:");
gst_mpdparser_get_xml_prop_string (a_node, "id", &new_period->id);
gst_mpdparser_get_xml_prop_duration (a_node, "start", -1, &new_period->start);
gst_mpdparser_get_xml_prop_duration (a_node, "duration", -1,
&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) {
gst_mpdparser_parse_segment_list_node (&new_period->SegmentList,
cur_node, NULL);
} else if (xmlStrcmp (cur_node->name, (xmlChar *) "SegmentTemplate") == 0) {
gst_mpdparser_parse_segment_template_node (&new_period->SegmentTemplate,
cur_node, NULL);
} 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) {
gst_mpdparser_parse_adaptation_set_node (&new_period->AdaptationSets,
cur_node, new_period);
}
}
}
}
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);
if (new_prog_info == NULL) {
GST_WARNING ("Allocation of ProgramInfo node failed!");
return;
}
*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);
if (new_metrics_range == NULL) {
GST_WARNING ("Allocation of Metrics Range node failed!");
return;
}
*list = g_list_append (*list, new_metrics_range);
GST_LOG ("attributes of Metrics Range node:");
gst_mpdparser_get_xml_prop_duration (a_node, "starttime", -1,
&new_metrics_range->starttime);
gst_mpdparser_get_xml_prop_duration (a_node, "duration", -1,
&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);
if (new_metrics == NULL) {
GST_WARNING ("Allocation of Metrics node failed!");
return;
}
*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)");
}
}
}
}
static void
gst_mpdparser_parse_root_node (GstMPDNode ** pointer, xmlNode * a_node)
{
xmlNode *cur_node;
GstMPDNode *new_mpd;
gst_mpdparser_free_mpd_node (*pointer);
*pointer = new_mpd = g_slice_new0 (GstMPDNode);
if (new_mpd == NULL) {
GST_WARNING ("Allocation of MPD node failed!");
return;
}
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", -1,
&new_mpd->mediaPresentationDuration);
gst_mpdparser_get_xml_prop_duration (a_node, "minimumUpdatePeriod", -1,
&new_mpd->minimumUpdatePeriod);
gst_mpdparser_get_xml_prop_duration (a_node, "minBufferTime", -1,
&new_mpd->minBufferTime);
gst_mpdparser_get_xml_prop_duration (a_node, "timeShiftBufferDepth", -1,
&new_mpd->timeShiftBufferDepth);
gst_mpdparser_get_xml_prop_duration (a_node, "suggestedPresentationDelay", -1,
&new_mpd->suggestedPresentationDelay);
gst_mpdparser_get_xml_prop_duration (a_node, "maxSegmentDuration", -1,
&new_mpd->maxSegmentDuration);
gst_mpdparser_get_xml_prop_duration (a_node, "maxSubsegmentDuration", -1,
&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) {
gst_mpdparser_parse_period_node (&new_mpd->Periods, cur_node);
} 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);
}
}
}
}
/* 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"))
return GST_STREAM_AUDIO;
if (strncmp_ext (mime, "video"))
return GST_STREAM_VIDEO;
if (strncmp_ext (mime, "application"))
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
&& Representation->SegmentBase->Initialization) {
SegmentBase = Representation->SegmentBase;
} else if (AdaptationSet && AdaptationSet->SegmentBase
&& AdaptationSet->SegmentBase->Initialization) {
SegmentBase = AdaptationSet->SegmentBase;
} else if (Period && Period->SegmentBase
&& Period->SegmentBase->Initialization) {
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
&& Representation->SegmentList->MultSegBaseType->
SegBaseType->Initialization) {
SegmentBase = Representation->SegmentList->MultSegBaseType->SegBaseType;
} else if (AdaptationSet && AdaptationSet->SegmentList
&& AdaptationSet->SegmentList->MultSegBaseType
&& AdaptationSet->SegmentList->MultSegBaseType->SegBaseType
&& AdaptationSet->SegmentList->MultSegBaseType->
SegBaseType->Initialization) {
SegmentBase = AdaptationSet->SegmentList->MultSegBaseType->SegBaseType;
} else if (Period && Period->SegmentList
&& Period->SegmentList->MultSegBaseType
&& Period->SegmentList->MultSegBaseType->SegBaseType
&& Period->SegmentList->MultSegBaseType->SegBaseType->Initialization) {
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 0;
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_mpdparser_get_segment_list (GstPeriodNode * Period,
GstAdaptationSetNode * AdaptationSet,
GstRepresentationNode * Representation)
{
GstSegmentListNode *SegmentList = NULL;
if (Representation && Representation->SegmentList) {
SegmentList = Representation->SegmentList;
} else if (AdaptationSet && AdaptationSet->SegmentList) {
SegmentList = AdaptationSet->SegmentList;
} else {
SegmentList = Period->SegmentList;
}
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_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);
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);
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);
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_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);
g_return_val_if_fail (InitializationURL != NULL, NULL);
url_prefix = InitializationURL->sourceURL ? InitializationURL->sourceURL :
stream->baseURL;
return url_prefix;
}
static gchar *
gst_mpdparser_build_URL_from_template (const gchar * url_template,
const gchar * id, guint number, guint bandwidth, guint64 time)
{
static gchar default_format[] = "%01d";
gchar **tokens, *token, *ret;
const gchar *format;
gint i, num_tokens;
gboolean last_token_par = TRUE; /* last token was a parameter */
g_return_val_if_fail (url_template != NULL, NULL);
tokens = g_strsplit_set (url_template, "$", -1);
if (!tokens) {
GST_WARNING ("Scan of URL template failed!");
return NULL;
}
num_tokens = g_strv_length (tokens);
for (i = 0; i < num_tokens; i++) {
token = tokens[i];
format = default_format;
if (!g_strcmp0 (token, "RepresentationID")) {
tokens[i] = g_strdup_printf ("%s", id);
g_free (token);
last_token_par = TRUE;
} else if (!strncmp (token, "Number", 6)) {
if (strlen (token) > 6) {
format = token + 6; /* format tag */
}
tokens[i] = g_strdup_printf (format, number);
g_free (token);
last_token_par = TRUE;
} else if (!strncmp (token, "Bandwidth", 9)) {
if (strlen (token) > 9) {
format = token + 9; /* format tag */
}
tokens[i] = g_strdup_printf (format, bandwidth);
g_free (token);
last_token_par = TRUE;
} else if (!strncmp (token, "Time", 4)) {
if (strlen (token) > 4) {
format = token + 4; /* format tag */
} else {
format = "%" G_GUINT64_FORMAT;
}
tokens[i] = g_strdup_printf (format, time);
g_free (token);
last_token_par = TRUE;
} else if (!g_strcmp0 (token, "")) {
if (!last_token_par) {
tokens[i] = g_strdup_printf ("%s", "$");
g_free (token);
last_token_par = TRUE;
}
} else {
last_token_par = FALSE;
}
}
ret = g_strjoinv (NULL, tokens);
g_strfreev (tokens);
return ret;
}
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);
if (clone) {
clone->first_byte_pos = range->first_byte_pos;
clone->last_byte_pos = range->last_byte_pos;
} else {
GST_WARNING ("Allocation of GstRange failed!");
}
}
return clone;
}
static GstURLType *
gst_mpdparser_clone_URL (GstURLType * url)
{
GstURLType *clone = NULL;
if (url) {
clone = g_slice_new0 (GstURLType);
if (clone) {
if (url->sourceURL) {
clone->sourceURL = xmlMemStrdup (url->sourceURL);
}
clone->range = gst_mpdparser_clone_range (url->range);
} else {
GST_WARNING ("Allocation of URLType node failed!");
}
}
return clone;
}
/* select a stream and extract the baseURL (if present) */
static gchar *
gst_mpdparser_parse_baseURL (GstMpdClient * client, GstActiveStream * stream,
gchar ** query)
{
GstStreamPeriod *stream_period;
GstBaseURL *baseURL;
gchar *mpd_uri;
GList *list;
static gchar *baseURL_array[5];
static gchar empty[] = "";
gchar *ret = NULL;
g_return_val_if_fail (stream != NULL, empty);
stream_period = gst_mpdparser_get_stream_period (client);
g_return_val_if_fail (stream_period != NULL, empty);
g_return_val_if_fail (stream_period->period != NULL, empty);
baseURL_array[0] = baseURL_array[1] = baseURL_array[2] = baseURL_array[3] =
empty;
baseURL_array[4] = NULL;
/* FIXME: this simple implementation is not fully compliant with RFC 3986 */
if ((list = client->mpd_node->BaseURLs) != NULL) {
baseURL = g_list_nth_data (list, stream->baseURL_idx);
if (!baseURL) {
baseURL = list->data;
}
baseURL_array[0] = baseURL->baseURL;
}
if ((list = stream_period->period->BaseURLs) != NULL) {
baseURL = g_list_nth_data (list, stream->baseURL_idx);
if (!baseURL) {
baseURL = list->data;
}
baseURL_array[1] = baseURL->baseURL;
}
GST_DEBUG ("Current adaptation set id %i (%s)", stream->cur_adapt_set->id,
stream->cur_adapt_set->contentType);
if ((list = stream->cur_adapt_set->BaseURLs) != NULL) {
baseURL = g_list_nth_data (list, stream->baseURL_idx);
if (!baseURL) {
baseURL = list->data;
}
baseURL_array[2] = baseURL->baseURL;
}
if ((list = stream->cur_representation->BaseURLs) != NULL) {
baseURL = g_list_nth_data (list, stream->baseURL_idx);
if (!baseURL) {
baseURL = list->data;
}
baseURL_array[3] = baseURL->baseURL;
}
ret = g_strjoinv (NULL, baseURL_array);
/* get base URI from MPD file URI, if the "http" scheme is missing */
mpd_uri = client->mpd_base_uri ? client->mpd_base_uri : client->mpd_uri;
if (mpd_uri != NULL && strncmp (ret, "http://", 7) != 0) {
gchar *last_sep, *tmp1, *tmp2;
if (ret[0] == '?') {
if (query)
*query = g_strdup (ret);
g_free (ret);
ret = NULL;
} else {
if (query)
*query = NULL;
}
last_sep = strrchr (mpd_uri, '/');
if (last_sep) {
tmp1 = g_strndup (mpd_uri, last_sep - mpd_uri + 1);
if (ret) {
tmp2 = ret;
ret = g_strconcat (tmp1, tmp2, NULL);
g_free (tmp1);
g_free (tmp2);
} else {
ret = tmp1;
}
GST_INFO ("Got base URI from MPD file URI %s", ret);
}
}
if (ret && *query == NULL) {
gchar *params = strchr (ret, '?');
if (params) {
*query = g_strdup (params);
params[0] = '\0'; /* can ignore the rest of the string */
}
}
return ret;
}
static GstClockTime
gst_mpd_client_get_segment_duration (GstMpdClient * client,
GstActiveStream * stream)
{
GstStreamPeriod *stream_period;
GstMultSegmentBaseType *base = NULL;
GstClockTime duration = 0;
guint timescale;
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;
} else {
duration = base->duration * GST_SECOND;
timescale = base->SegBaseType->timescale;
if (timescale > 1)
duration /= timescale;
}
return duration;
}
/*****************************/
/******* API functions *******/
/*****************************/
GstMpdClient *
gst_mpd_client_new (void)
{
GstMpdClient *client;
client = g_new0 (GstMpdClient, 1);
g_mutex_init (&client->lock);
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_mutex_clear (&client->lock);
g_free (client->mpd_uri);
client->mpd_uri = NULL;
g_free (client->mpd_base_uri);
client->mpd_base_uri = NULL;
g_free (client);
}
gboolean
gst_mpd_parse (GstMpdClient * client, const gchar * data, gint size)
{
if (data) {
xmlDocPtr doc;
xmlNode *root_element = NULL;
GST_DEBUG ("MPD file fully buffered, start parsing...");
GST_MPD_CLIENT_LOCK (client);
/* 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, 0);
if (doc == NULL) {
GST_ERROR ("failed to parse the MPD file");
GST_MPD_CLIENT_UNLOCK (client);
return 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");
} else {
/* now we can parse the MPD root node and all children nodes, recursively */
gst_mpdparser_parse_root_node (&client->mpd_node, root_element);
}
/* free the document */
xmlFreeDoc (doc);
}
GST_MPD_CLIENT_UNLOCK (client);
return TRUE;
}
return FALSE;
}
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;
}
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);
if (stream->segments) {
GstMediaSegment *list_segment;
/* fixed list of segments */
if (indexChunk >= stream->segments->len)
return FALSE;
list_segment = g_ptr_array_index (stream->segments, indexChunk);
segment->SegmentURL = list_segment->SegmentURL;
segment->number = list_segment->number;
segment->start = list_segment->start;
segment->start_time = list_segment->start_time;
segment->duration = list_segment->duration;
} else {
GstClockTime duration;
GstStreamPeriod *stream_period;
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);
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->start_time = duration * indexChunk;
segment->duration = duration;
segment->SegmentURL = NULL;
if (segment->start_time > stream_period->start + stream_period->duration) {
return FALSE;
}
}
return TRUE;
}
static gboolean
gst_mpd_client_add_media_segment (GstActiveStream * stream,
GstSegmentURLNode * url_node, guint number, guint64 start,
GstClockTime start_time, GstClockTime duration)
{
GstMediaSegment *media_segment;
g_return_val_if_fail (stream->segments != NULL, FALSE);
media_segment = g_slice_new0 (GstMediaSegment);
if (media_segment == NULL) {
GST_WARNING ("Allocation of GstMediaSegment struct failed!");
return FALSE;
}
media_segment->SegmentURL = url_node;
media_segment->number = number;
media_segment->start = start;
media_segment->start_time = start_time;
media_segment->duration = duration;
g_ptr_array_add (stream->segments, media_segment);
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 (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, PeriodStart,
PeriodEnd)) {
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 = PeriodStart;
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 j, 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);
duration = S->d * GST_SECOND;
timescale =
stream->cur_segment_list->MultSegBaseType->SegBaseType->timescale;
if (timescale > 1)
duration /= timescale;
if (S->t > 0) {
start = S->t;
start_time = S->t * GST_SECOND;
if (timescale > 1)
start_time /= timescale;
}
for (j = 0; j <= S->r && SegmentURL != NULL; j++) {
if (!gst_mpd_client_add_media_segment (stream, SegmentURL->data, i,
start, start_time, duration)) {
return FALSE;
}
i++;
start += S->d;
start_time += duration;
SegmentURL = g_list_next (SegmentURL);
}
}
} else {
duration = gst_mpd_client_get_segment_duration (client, stream);
if (!GST_CLOCK_TIME_IS_VALID (duration))
return FALSE;
while (SegmentURL) {
if (!gst_mpd_client_add_media_segment (stream, SegmentURL->data, i, 0,
start_time, duration)) {
return FALSE;
}
i++;
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)) {
return FALSE;
}
} else {
/* build segment list */
i = stream->cur_seg_template->MultSegBaseType->startNumber;
start = 0;
start_time = PeriodStart;
GST_LOG ("Building media segment list using this template: %s",
stream->cur_seg_template->media);
if (stream->cur_seg_template->MultSegBaseType->SegmentTimeline) {
GstSegmentTimelineNode *timeline;
GstSNode *S;
GList *list;
timeline = stream->cur_seg_template->MultSegBaseType->SegmentTimeline;
gst_mpdparser_init_active_stream_segments (stream);
for (list = g_queue_peek_head_link (&timeline->S); list;
list = g_list_next (list)) {
guint j, 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);
duration = S->d * GST_SECOND;
timescale =
stream->cur_seg_template->MultSegBaseType->SegBaseType->timescale;
if (timescale > 1)
duration /= timescale;
if (S->t > 0) {
start = S->t;
start_time = S->t * GST_SECOND;
if (timescale > 1)
start_time /= timescale;
}
for (j = 0; j <= S->r; j++) {
if (!gst_mpd_client_add_media_segment (stream, NULL, i, start,
start_time, duration)) {
return FALSE;
}
i++;
start += S->d;
start_time += duration;
}
}
} 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_time + last_media_segment->duration >
PeriodEnd) {
last_media_segment->duration = PeriodEnd - last_media_segment->start_time;
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;
}
gboolean
gst_mpd_client_setup_media_presentation (GstMpdClient * client)
{
GstStreamPeriod *stream_period;
GstPeriodNode *period_node;
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);
GST_DEBUG ("Building the list of Periods in the Media Presentation");
GST_MPD_CLIENT_LOCK (client);
/* clean the old period list, if any */
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;
for (list = g_list_first (client->mpd_node->Periods); list;
list = g_list_next (list)) {
period_node = (GstPeriodNode *) list->data;
if (period_node->start != -1) {
/* we have a regular period */
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;
}
if (period_node->duration != -1) {
duration = period_node->duration * GST_MSECOND;
} else if ((next = g_list_next (list)) != NULL) {
/* try to infer this period duration from the start time of the next period */
GstPeriodNode *next_period_node = next->data;
if (next_period_node->start != -1) {
duration = next_period_node->start * GST_MSECOND - start;
} 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 */
duration =
client->mpd_node->mediaPresentationDuration * GST_MSECOND - start;
} 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);
if (stream_period == NULL) {
goto no_mem;
}
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));
}
GST_MPD_CLIENT_UNLOCK (client);
GST_DEBUG ("Found a total of %d valid Periods in the Media Presentation",
idx);
return ret;
early:
GST_MPD_CLIENT_UNLOCK (client);
GST_WARNING
("Found an Early Available Period, skipping the rest of the Media Presentation");
return ret;
syntax_error:
GST_MPD_CLIENT_UNLOCK (client);
GST_WARNING
("Cannot get the duration of the Period %d, skipping the rest of the Media Presentation",
idx);
return ret;
no_mem:
GST_MPD_CLIENT_UNLOCK (client);
GST_WARNING ("Allocation of GstStreamPeriod struct failed!");
return FALSE;
}
static GList *
gst_mpd_client_get_adaptation_sets_for_period (GstMpdClient * client,
GstStreamPeriod * period)
{
g_return_val_if_fail (period != NULL, NULL);
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);
if (stream == NULL) {
GST_WARNING ("Allocation of active stream struct failed!");
return FALSE;
}
gst_mpdparser_init_active_stream_segments (stream);
stream->baseURL_idx = 0;
stream->cur_adapt_set = adapt_set;
GST_DEBUG ("0. Current stream %p", stream);
/* retrive 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) {
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))
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;
GstMediaSegment *selectedChunk = NULL;
g_return_val_if_fail (stream != NULL, 0);
GST_MPD_CLIENT_LOCK (client);
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", index);
if (segment->start_time <= ts
&& ts < segment->start_time + segment->duration) {
selectedChunk = segment;
break;
}
}
if (selectedChunk == NULL) {
GST_MPD_CLIENT_UNLOCK (client);
return FALSE;
}
} else {
GstClockTime duration =
gst_mpd_client_get_segment_duration (client, stream);
g_return_val_if_fail (stream->cur_seg_template->MultSegBaseType->
SegmentTimeline == NULL, FALSE);
if (!GST_CLOCK_TIME_IS_VALID (duration)) {
GST_MPD_CLIENT_UNLOCK (client);
return FALSE;
}
index = ts / duration;
}
gst_mpd_client_set_segment_index (stream, index);
GST_MPD_CLIENT_UNLOCK (client);
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;
}
gint
gst_mpd_client_get_segment_index_at_time (GstMpdClient * client,
GstActiveStream * stream, const GstDateTime * time)
{
GstClockTime seg_duration;
gint64 diff;
GstDateTime *avail_start =
gst_mpd_client_get_availability_start_time (client);
GstStreamPeriod *stream_period = gst_mpdparser_get_stream_period (client);
if (avail_start == NULL)
return -1;
if (stream_period && stream_period->period) {
GstDateTime *t;
t = gst_mpd_client_add_time_difference (avail_start,
stream_period->period->start * 1000);
gst_date_time_unref (avail_start);
avail_start = t;
}
diff = gst_mpd_client_calculate_time_difference (avail_start, time);
gst_date_time_unref (avail_start);
if (diff < 0)
return -2;
if (diff > gst_mpd_client_get_media_presentation_duration (client))
return -3;
/* TODO: Assumes all fragments are roughly the same duration */
seg_duration = gst_mpd_client_get_next_fragment_duration (client, stream);
if (seg_duration == 0)
return -1;
return diff / seg_duration;
}
static GstDateTime *
gst_mpd_client_get_availability_start_time (GstMpdClient * client)
{
GstDateTime *start_time;
if (client == NULL)
return (GstDateTime *) NULL;
GST_MPD_CLIENT_LOCK (client);
start_time = client->mpd_node->availabilityStartTime;
gst_date_time_ref (start_time);
GST_MPD_CLIENT_UNLOCK (client);
return start_time;
}
gboolean
gst_mpd_client_get_last_fragment_timestamp (GstMpdClient * client,
guint stream_idx, GstClockTime * ts)
{
GstActiveStream *stream;
gint segment_idx;
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);
GST_MPD_CLIENT_LOCK (client);
segment_idx = gst_mpd_client_get_segments_counts (stream) - 1;
GST_DEBUG ("Looking for fragment sequence chunk %d", segment_idx);
if (!gst_mpdparser_get_chunk_by_index (client, stream_idx, segment_idx,
&currentChunk)) {
GST_MPD_CLIENT_UNLOCK (client);
return FALSE;
}
*ts = currentChunk.start_time;
GST_MPD_CLIENT_UNLOCK (client);
return TRUE;
}
gboolean
gst_mpd_client_get_next_fragment_timestamp (GstMpdClient * client,
guint stream_idx, GstClockTime * ts)
{
GstActiveStream *stream;
gint segment_idx;
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);
GST_MPD_CLIENT_LOCK (client);
segment_idx = gst_mpd_client_get_segment_index (stream);
GST_DEBUG ("Looking for fragment sequence chunk %d", segment_idx);
if (!gst_mpdparser_get_chunk_by_index (client, stream_idx, segment_idx,
&currentChunk)) {
GST_MPD_CLIENT_UNLOCK (client);
return FALSE;
}
*ts = currentChunk.start_time;
GST_MPD_CLIENT_UNLOCK (client);
return TRUE;
}
gboolean
gst_mpd_client_get_next_fragment (GstMpdClient * client,
guint indexStream, GstMediaFragmentInfo * fragment, gboolean forward)
{
GstActiveStream *stream = NULL;
GstMediaSegment currentChunk;
gchar *mediaURL = NULL;
gchar *indexURL = NULL;
guint segment_idx;
/* 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);
GST_MPD_CLIENT_LOCK (client);
segment_idx = gst_mpd_client_get_segment_index (stream);
GST_DEBUG ("Looking for fragment sequence chunk %d", segment_idx);
if (!gst_mpdparser_get_chunk_by_index (client, indexStream, segment_idx,
&currentChunk)) {
GST_MPD_CLIENT_UNLOCK (client);
return FALSE;
}
GST_DEBUG ("currentChunk->SegmentURL = %p", currentChunk.SegmentURL);
if (currentChunk.SegmentURL != NULL) {
mediaURL =
g_strdup (gst_mpdparser_get_mediaURL (stream, currentChunk.SegmentURL));
indexURL = 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->cur_representation->bandwidth, currentChunk.start);
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->cur_representation->bandwidth, currentChunk.start);
}
}
GST_DEBUG ("mediaURL = %s", mediaURL);
GST_DEBUG ("indexURL = %s", indexURL);
fragment->timestamp = currentChunk.start_time;
fragment->duration = currentChunk.duration;
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 (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;
}
}
if (mediaURL == NULL) {
/* single segment with URL encoded in the baseURL syntax element */
fragment->uri = g_strdup (stream->baseURL);
} else if (strncmp (mediaURL, "http://", 7) != 0) {
fragment->uri =
g_strconcat (stream->baseURL, mediaURL, stream->queryURL, NULL);
g_free (mediaURL);
} else if (stream->queryURL) {
fragment->uri = g_strconcat (mediaURL, stream->queryURL, NULL);
g_free (mediaURL);
} else {
fragment->uri = mediaURL;
}
if (indexURL != NULL) {
if (strncmp (indexURL, "http://", 7) != 0) {
fragment->index_uri =
g_strconcat (stream->baseURL, indexURL, stream->queryURL, NULL);
g_free (indexURL);
} else if (stream->queryURL) {
fragment->index_uri = g_strconcat (indexURL, stream->queryURL, NULL);
g_free (indexURL);
} else {
fragment->index_uri = indexURL;
}
} else if (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_mpd_client_set_segment_index (stream,
forward ? segment_idx + 1 : segment_idx - 1);
GST_MPD_CLIENT_UNLOCK (client);
GST_DEBUG ("Loading chunk with URL %s", fragment->uri);
return TRUE;
}
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");
GST_MPD_CLIENT_LOCK (client);
*uri = NULL;
if (stream->cur_segment_base && 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_seg_template) {
const gchar *initialization = NULL;
if (stream->cur_seg_template->initialization) {
initialization = stream->cur_seg_template->initialization;
} else if (stream->cur_adapt_set->SegmentTemplate
&& stream->cur_adapt_set->SegmentTemplate->initialization) {
initialization = stream->cur_adapt_set->SegmentTemplate->initialization;
} else if (stream_period->period->SegmentTemplate
&& stream_period->period->SegmentTemplate->initialization) {
initialization = stream_period->period->SegmentTemplate->initialization;
}
if (initialization) {
*uri = gst_mpdparser_build_URL_from_template (initialization,
stream->cur_representation->id, 0,
stream->cur_representation->bandwidth, 0);
}
}
GST_MPD_CLIENT_UNLOCK (client);
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");
GST_MPD_CLIENT_LOCK (client);
*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) {
const gchar *initialization = NULL;
if (stream->cur_seg_template->index) {
initialization = stream->cur_seg_template->index;
} else if (stream->cur_adapt_set->SegmentTemplate
&& stream->cur_adapt_set->SegmentTemplate->index) {
initialization = stream->cur_adapt_set->SegmentTemplate->index;
} else if (stream_period->period->SegmentTemplate
&& stream_period->period->SegmentTemplate->index) {
initialization = stream_period->period->SegmentTemplate->index;
}
if (initialization)
*uri = gst_mpdparser_build_URL_from_template (initialization,
stream->cur_representation->id, 0,
stream->cur_representation->bandwidth, 0);
}
GST_MPD_CLIENT_UNLOCK (client);
return *uri == NULL ? FALSE : TRUE;
}
GstClockTime
gst_mpd_client_get_next_fragment_duration (GstMpdClient * client,
GstActiveStream * stream)
{
GstMediaSegment *media_segment = NULL;
guint seg_idx;
g_return_val_if_fail (stream != NULL, 0);
seg_idx = gst_mpd_client_get_segment_index (stream);
if (stream->segments) {
if (seg_idx < stream->segments->len)
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);
g_return_val_if_fail (stream->cur_seg_template->
MultSegBaseType->SegmentTimeline == NULL, 0);
if (GST_CLOCK_TIME_IS_VALID (duration))
return duration;
return 0;
}
}
GstClockTime
gst_mpd_client_get_media_presentation_duration (GstMpdClient * client)
{
GstClockTime duration;
g_return_val_if_fail (client != NULL, GST_CLOCK_TIME_NONE);
GST_MPD_CLIENT_LOCK (client);
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;
}
GST_MPD_CLIENT_UNLOCK (client);
return duration;
}
gboolean
gst_mpd_client_set_period_id (GstMpdClient * client, const gchar * period_id)
{
GstStreamPeriod *next_stream_period;
gboolean ret = FALSE;
GList *iter;
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);
GST_MPD_CLIENT_LOCK (client);
for (iter = client->periods; iter; 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;
break;
}
}
GST_MPD_CLIENT_UNLOCK (client);
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);
GST_MPD_CLIENT_LOCK (client);
next_stream_period = g_list_nth_data (client->periods, period_idx);
if (next_stream_period != NULL) {
client->period_idx = period_idx;
ret = TRUE;
}
GST_MPD_CLIENT_UNLOCK (client);
return ret;
}
guint
gst_mpd_client_get_period_index (GstMpdClient * client)
{
guint period_idx;
g_return_val_if_fail (client != NULL, 0);
GST_MPD_CLIENT_LOCK (client);
period_idx = client->period_idx;
GST_MPD_CLIENT_UNLOCK (client);
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);
GST_MPD_CLIENT_LOCK (client);
period = g_list_nth_data (client->periods, client->period_idx);
if (period && period->period)
period_id = period->period->id;
GST_MPD_CLIENT_UNLOCK (client);
return period_id;
}
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);
GST_MPD_CLIENT_LOCK (client);
next_stream_period =
g_list_nth_data (client->periods, client->period_idx + 1);
GST_MPD_CLIENT_UNLOCK (client);
return next_stream_period != NULL;
}
void
gst_mpd_client_set_segment_index_for_all_streams (GstMpdClient * client,
guint segment_idx)
{
GList *list;
g_return_if_fail (client != NULL);
g_return_if_fail (client->active_streams != NULL);
/* FIXME: support multiple streams with different segment duration */
for (list = g_list_first (client->active_streams); list;
list = g_list_next (list)) {
GstActiveStream *stream = (GstActiveStream *) list->data;
if (stream) {
stream->segment_idx = segment_idx;
}
}
}
void
gst_mpd_client_set_segment_index (GstActiveStream * stream, guint segment_idx)
{
g_return_if_fail (stream != NULL);
stream->segment_idx = segment_idx;
}
guint
gst_mpd_client_get_segment_index (GstActiveStream * stream)
{
g_return_val_if_fail (stream != NULL, 0);
return stream->segment_idx;
}
static guint
gst_mpd_client_get_segments_counts (GstActiveStream * stream)
{
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);
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);
}
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;
}
const gchar *
gst_mpd_client_get_stream_mimeType (GstActiveStream * stream)
{
const gchar *mimeType;
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;
}
return gst_mpdparser_mimetype_to_caps (mimeType);
}
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 *list;
const gchar *this_mimeType = "audio";
gchar *mimeType = NULL;
guint nb_adapatation_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);
for (list = g_list_first (stream_period->period->AdaptationSets); list;
list = g_list_next (list)) {
adapt_set = (GstAdaptationSetNode *) list->data;
if (adapt_set) {
gchar *this_lang = adapt_set->lang;
GstRepresentationNode *rep;
rep =
gst_mpdparser_get_lowest_representation (adapt_set->Representations);
if (rep->RepresentationBase)
mimeType = rep->RepresentationBase->mimeType;
if (!mimeType && adapt_set->RepresentationBase) {
mimeType = adapt_set->RepresentationBase->mimeType;
}
if (strncmp_ext (mimeType, this_mimeType) == 0) {
if (this_lang) {
nb_adapatation_set++;
*lang = g_list_append (*lang, this_lang);
}
}
}
}
return nb_adapatation_set;
}
GstDateTime *
gst_mpd_client_get_next_segment_availability_end_time (GstMpdClient * client,
GstActiveStream * stream)
{
GstDateTime *availability_start_time, *rv;
guint 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 = gst_mpd_client_get_segment_index (stream);
seg_duration = gst_mpd_client_get_segment_duration (client, stream);
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->period->start * 1000);
gst_date_time_unref (availability_start_time);
availability_start_time = t;
}
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);
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
&& 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);
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);
}
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