dash: Reworking MPD attributes parsing.

Mandatory elements are now checked.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
(cherry picked from commit a43d294f8371770f4425eb0f2e2a8ec29e1b2e92)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/stream_filter/dash/mpd/BasicCMParser.cpp

@@ -49,17 +49,74 @@ bool    BasicCMParser::parse                ()
     this->setMPD();
     return true;
 }
-void    BasicCMParser::setMPD               ()
+bool    BasicCMParser::setMPD()
 {
     const std::map<std::string, std::string>    attr = this->root->getAttributes();
-    this->mpd = new MPD( attr );
+    this->mpd = new MPD;
 
     std::map<std::string, std::string>::const_iterator  it;
     it = attr.find( "profile" );
     if ( it != attr.end() )
         this->mpd->setProfile( it->second );
+
+    it = attr.find("mediaPresentationDuration");
+    /*
+        Standard specifies a default of "On-Demand",
+        so anything that is not "Live" is "On-Demand"
+    */
+    this->mpd->setLive( it != attr.end() && it->second == "Live" );
+    it = attr.find( "availabilityStartTime" );
+    if ( it == attr.end() && this->mpd->isLive() == true )
+    {
+        std::cerr << "An @availabilityStartTime attribute must be specified when"
+                     " the stream @type is Live" << std::endl;
+        return false;
+    }
+    if ( it != attr.end() )
+    {
+        struct tm   t;
+        char        *res = strptime( it->second.c_str(), "%Y-%m-%dT%T", &t );
+        if ( res == NULL )
+        {
+            if ( this->mpd->isLive() == true )
+            {
+                std::cerr << "An @availabilityStartTime attribute must be specified when"
+                             " the stream @type is Live" << std::endl;
+                return false;
+            }
+        }
+        else
+            this->mpd->setAvailabilityStartTime( mktime( &t ) );
+    }
+    it = attr.find( "availabilityEndTime" );
+    if ( it != attr.end() )
+    {
+        struct tm   t;
+        char        *res = strptime( it->second.c_str(), "%Y-%m-%dT%T", &t );
+        if ( res != NULL )
+            this->mpd->setAvailabilityEndTime( mktime( &t ) );
+    }
+    it = attr.find( "mediaPresentationDuration" );
+    if ( it != attr.end() )
+        this->mpd->setDuration( str_duration( it->second.c_str() ) );
+    it = attr.find( "minimumUpdatePeriodMPD" );
+    if ( it != attr.end() )
+        this->mpd->setMinUpdatePeriod( str_duration( it->second.c_str() ) );
+    it = attr.find( "minBufferTime" );
+    if ( it != attr.end() )
+        this->mpd->setMinBufferTime( str_duration( it->second.c_str() ) );
+
+    if ( this->mpd->isLive() )
+    {
+        //This value is undefined when using type "On-Demand"
+        it = attr.find( "timeshiftBufferDepth" );
+        if ( it != attr.end() )
+            this->mpd->setTimeShiftBufferDepth( str_duration( it->second.c_str() ) );
+    }
+
     this->setMPDBaseUrl(this->root);
     this->setPeriods(this->root);
+    return true;
 }
 void    BasicCMParser::setMPDBaseUrl        (Node *root)
 {

modules/stream_filter/dash/mpd/BasicCMParser.h

@@ -56,7 +56,7 @@ namespace dash
                 dash::xml::Node *root;
                 MPD             *mpd;
 
-                void    setMPD              ();
+                bool    setMPD              ();
                 void    setPeriods          (dash::xml::Node *root);
                 void    setGroups           (dash::xml::Node *root, Period *period);
                 void    setRepresentations  (dash::xml::Node *root, Group *group);

modules/stream_filter/dash/mpd/MPD.cpp

@@ -30,9 +30,15 @@
 using namespace dash::mpd;
 using namespace dash::exception;
 
-MPD::MPD    (const AttributesMap& attributes) :
+MPD::MPD () :
     profile( dash::mpd::NotValid ),
-    attributes( attributes ),
+    live( false ),
+    availabilityStartTime( -1 ),
+    availabilityEndTime( -1 ),
+    duration( -1 ),
+    minUpdatePeriod( -1 ),
+    minBufferTime( -1 ),
+    timeShiftBufferDepth( -1 ),
     programInfo( NULL )
 {
 }
@@ -58,24 +64,51 @@ const std::vector<BaseUrl*>&   MPD::getBaseUrls            () const
     return this->baseUrls;
 }
 
-const std::string&             MPD::getMinBufferTime       () const throw(AttributeNotPresentException)
+
+time_t      MPD::getDuration() const
+{
+    return this->duration;
+}
+
+void MPD::setDuration(time_t duration)
+{
+    if ( duration >= 0 )
+        this->duration = duration;
+}
+
+time_t MPD::getMinUpdatePeriod() const
+{
+    return this->minUpdatePeriod;
+}
+
+void MPD::setMinUpdatePeriod(time_t period)
 {
-    AttributesMap::const_iterator     it = this->attributes.find("minBufferTime");
-    if( it == this->attributes.end())
-        throw AttributeNotPresentException();
+    if ( period >= 0 )
+        this->minUpdatePeriod = period;
+}
 
-    return it->second;
+time_t MPD::getMinBufferTime() const
+{
+    return this->minBufferTime;
 }
 
-const std::string&             MPD::getDuration            () const throw(AttributeNotPresentException)
+void MPD::setMinBufferTime(time_t time)
 {
-    AttributesMap::const_iterator     it = this->attributes.find("mediaPresentationDuration");
+    if ( time >= 0 )
+        this->minBufferTime = time;
+}
 
-    if( it == this->attributes.end())
-        throw AttributeNotPresentException();
+time_t MPD::getTimeShiftBufferDepth() const
+{
+    return this->timeShiftBufferDepth;
+}
 
-    return it->second;
+void MPD::setTimeShiftBufferDepth(time_t depth)
+{
+    if ( depth >= 0 )
+        this->timeShiftBufferDepth = depth;
 }
+
 ProgramInformation*     MPD::getProgramInformation  () throw(ElementNotPresentException)
 {
     if(this->programInfo == NULL)
@@ -98,13 +131,34 @@ void                    MPD::setProgramInformation  (ProgramInformation *progInf
 
 bool                    MPD::isLive() const
 {
-    AttributesMap::const_iterator     it = this->attributes.find("mediaPresentationDuration");
+    return this->live;
+}
+
+void                    MPD::setLive( bool live )
+{
+    this->live = live;
+}
+
+time_t MPD::getAvailabilityStartTime() const
+{
+    return this->availabilityStartTime;
+}
 
-    /*
-        Standard specifies a default of "On-Demand",
-        so anything that is not "Live" is "On-Demand"
-    */
-    return ( it != this->attributes.end() && it->second == "Live" );
+void MPD::setAvailabilityStartTime(time_t time)
+{
+    if ( time >=0 )
+        this->availabilityStartTime = time;
+}
+
+time_t MPD::getAvailabilityEndTime() const
+{
+    return this->availabilityEndTime;
+}
+
+void MPD::setAvailabilityEndTime(time_t time)
+{
+    if ( time >= 0 )
+        this->availabilityEndTime = time;
 }
 
 Profile MPD::getProfile() const

modules/stream_filter/dash/mpd/MPD.h

@@ -42,18 +42,27 @@ namespace dash
     {
         class MPD
         {
-            typedef std::map<std::string, std::string>      AttributesMap;
-
             public:
-                MPD         (const AttributesMap& attributes);
+                MPD();
                 virtual ~MPD();
 
                 Profile                         getProfile() const;
                 void                            setProfile( const std::string &strProfile );
                 void                            setProfile( Profile profile );
-                bool                           isLive() const;
-                const std::string&             getDuration             () const throw(dash::exception::AttributeNotPresentException);
-                const std::string&             getMinBufferTime        () const throw(dash::exception::AttributeNotPresentException);
+                bool                            isLive() const;
+                void                            setLive( bool live );
+                time_t                          getAvailabilityStartTime() const;
+                void                            setAvailabilityStartTime( time_t time );
+                time_t                          getAvailabilityEndTime() const;
+                void                            setAvailabilityEndTime( time_t time );
+                time_t                          getDuration() const;
+                void                            setDuration( time_t duration );
+                time_t                          getMinUpdatePeriod() const;
+                void                            setMinUpdatePeriod( time_t period );
+                time_t                          getMinBufferTime() const;
+                void                            setMinBufferTime( time_t time );
+                time_t                          getTimeShiftBufferDepth() const;
+                void                            setTimeShiftBufferDepth( time_t depth );
                 const std::vector<BaseUrl *>&  getBaseUrls      () const;
                 const std::vector<Period *>&   getPeriods       () const;
                 ProgramInformation*     getProgramInformation   () throw(dash::exception::ElementNotPresentException);
@@ -64,7 +73,13 @@ namespace dash
 
             private:
                 Profile                             profile;
-                AttributesMap                       attributes;
+                bool                                live;
+                time_t                              availabilityStartTime;
+                time_t                              availabilityEndTime;
+                time_t                              duration;
+                time_t                              minUpdatePeriod;
+                time_t                              minBufferTime;
+                time_t                              timeShiftBufferDepth;
                 std::vector<Period *>               periods;
                 std::vector<BaseUrl *>              baseUrls;
                 ProgramInformation                  *programInfo;