Fix MPD@duration not set with MpdGenerator

Fixes: #401.

Change-Id: I5cd7c691d9cf4f187d12e5de60bf641e753f800c

packager/app/test/testdata/encryption-and-output-media-info-and-mpd-from-media-info/output.mpd

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--Generated with https://github.com/google/shaka-packager version <tag>-<hash>-<test>-->
-<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" xmlns:cenc="urn:mpeg:cenc:2013" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT0S">
+<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" xmlns:cenc="urn:mpeg:cenc:2013" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" minBufferTime="PT2S" type="static" mediaPresentationDuration="PT2.7360665798187256S">
   <Period id="0">
     <AdaptationSet id="0" contentType="video" width="640" height="360" frameRate="30000/1001" par="16:9">
       <Representation id="0" bandwidth="977743" codecs="avc1.64001e" mimeType="video/mp4" sar="1:1">

packager/mpd/base/period.cc

@@ -46,6 +46,11 @@ Period::Period(uint32_t period_id,
 AdaptationSet* Period::GetOrCreateAdaptationSet(
     const MediaInfo& media_info,
     bool content_protection_in_adaptation_set) {
+  // Set duration if it is not set. It may be updated later from duration
+  // calculated from segments.
+  if (duration_seconds_ == 0)
+    duration_seconds_ = media_info.media_duration_seconds();
+
   // AdaptationSets with the same key should only differ in ContentProtection,
   // which also means that if |content_protection_in_adaptation_set| is false,
   // there should be at most one entry in |adaptation_sets|.

packager/mpd/test/data/audio_media_info1_expected_mpd_output.txt

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" minBufferTime="PT2S" type="static" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" mediaPresentationDuration="PT0S">
+<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" minBufferTime="PT2S" type="static" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" mediaPresentationDuration="PT10.5S">
   <Period>
     <AdaptationSet id="0" contentType="audio">
       <Representation id="0" bandwidth="400" codecs="mp4a.40.2" mimeType="audio/mp4" audioSamplingRate="44100">

packager/mpd/test/data/audio_media_info1_video_media_info1_expected_mpd_output.txt

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" minBufferTime="PT2S" type="static" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" mediaPresentationDuration="PT0S">
+<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" minBufferTime="PT2S" type="static" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" mediaPresentationDuration="PT10.5S">
   <Period id="0">
     <AdaptationSet contentType="video" width="720" height="480" frameRate="10/1" par="3:2">
       <Representation id="0" bandwidth="7620" codecs="avc1.010101" mimeType="video/mp4" sar="1:1">

packager/mpd/test/data/video_media_info1_expected_mpd_output.txt

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" minBufferTime="PT2S" type="static" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" mediaPresentationDuration="PT0S">
+<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" minBufferTime="PT2S" type="static" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" mediaPresentationDuration="PT10.5S">
   <Period id="0">
     <AdaptationSet width="720" height="480" frameRate="10/1" contentType="video" par="3:2">
       <Representation id="0" bandwidth="7620" codecs="avc1.010101" mimeType="video/mp4" sar="1:1">

packager/mpd/test/data/video_media_info1and2_expected_mpd_output.txt

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" minBufferTime="PT2S" type="static" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" mediaPresentationDuration="PT0S">
+<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xsi:schemaLocation="urn:mpeg:dash:schema:mpd:2011 DASH-MPD.xsd" minBufferTime="PT2S" type="static" profiles="urn:mpeg:dash:profile:isoff-on-demand:2011" mediaPresentationDuration="PT10.5S">
   <Period id="0">
     <AdaptationSet contentType="video" maxWidth="720" maxHeight="480" maxFrameRate="10/1">
       <Representation id="0" bandwidth="7620" codecs="avc1.010101" mimeType="video/mp4" width="720" height="480" frameRate="10/1" sar="1:1">