Default segment duration to target duration if unspecified

When parsing a media playlist, if a URI is encountered without a corresponding #EXTINF with valid duration, default its value to the last encountered #EXT-X-TARGETDURATION tag.

@@ -422,6 +422,15 @@
           currentUri.uri = entry.uri;
           uris.push(currentUri);
 
+          // if no explicit duration was declared, use the target duration
+          if (this.manifest.targetDuration &&
+              !('duration' in currentUri)) {
+            this.trigger('warn', {
+              message: 'defaulting segment duration to the target duration'
+            });
+            currentUri.duration = this.manifest.targetDuration;
+          }
+
           // prepare for the next URI
           currentUri = {};
         },

@@ -16,6 +16,7 @@
         "length": 587500,
         "offset": 522828
       },
+      "duration": 10,
       "uri": "hls_450k_video.ts"
     },
     {
@@ -135,6 +136,7 @@
         "length": 44556,
         "offset": 8353216
       },
+      "duration": 10,
       "uri": "hls_450k_video.ts"
     }
   ],

@@ -8,9 +8,11 @@
       "uri": "/test/ts-files/tvy7/8a5e2822668b5370f4eb1438b2564fb7ab12ffe1-hi720.ts"
     },
     {
+      "duration": 8,
       "uri": "/test/ts-files/tvy7/56be1cef869a1c0cc8e38864ad1add17d187f051-hi720.ts"
     },
     {
+      "duration": 8,
       "uri": "/test/ts-files/tvy7/549c8c77f55f049741a06596e5c1e01dacaa46d0-hi720.ts"
     }
   ],

@@ -8,6 +8,7 @@
       "uri": "hls_450k_video.ts"
     },
     {
+      "duration": 10,
       "uri": "hls_450k_video.ts"
     },
     {

@@ -8,12 +8,15 @@
       "uri": "/test/ts-files/tvy7/8a5e2822668b5370f4eb1438b2564fb7ab12ffe1-hi720.ts"
     },
     {
+      "duration": 8,
       "uri": "/test/ts-files/tvy7/56be1cef869a1c0cc8e38864ad1add17d187f051-hi720.ts"
     },
     {
+      "duration": 8,
       "uri": "/test/ts-files/tvy7/549c8c77f55f049741a06596e5c1e01dacaa46d0-hi720.ts"
     },
     {
+      "duration": 8,
       "uri": "/test/ts-files/tvy7/6cfa378684ffeb1c455a64dae6c103290a1f53d4-hi720.ts"
     }
   ],

+{
+  "allowCache": true,
+  "mediaSequence": 0,
+  "playlistType": "VOD",
+  "targetDuration": 10,
+  "segments": [{
+    "uri": "001.ts"
+  }, {
+    "uri": "002.ts",
+    "duration": 9
+  }, {
+    "uri": "003.ts",
+    "duration": 7
+  }, {
+    "uri": "004.ts",
+    "duration": 10
+  }]
+}

+#EXTM3U
+001.ts
+#EXT-X-TARGETDURATION:9
+002.ts
+#EXTINF:7
+003.ts
+#EXT-X-TARGETDURATION:10
+004.ts
\ No newline at end of file