From efd17f86c5507a68e2568b2d4a30f9280eb53bab Mon Sep 17 00:00:00 2001
From: aquilescanta <aquilescanta@google.com>
Date: Tue, 27 Jun 2017 09:38:31 -0700
Subject: [PATCH] Add URLs EXT-X-STREAM-INF uris only once

This prevents ExoPlayer from thinking there are many more video tracks
than there actually are. And will prevent downloading multiple times
the same rendition once offline support for HLS is added.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=160285777
---
 .../source/hls/playlist/HlsPlaylistParser.java     | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/library/hls/src/main/java/com/google/android/exoplayer2/source/hls/playlist/HlsPlaylistParser.java b/library/hls/src/main/java/com/google/android/exoplayer2/source/hls/playlist/HlsPlaylistParser.java
index a867659838..c64b98b5f3 100644
--- a/library/hls/src/main/java/com/google/android/exoplayer2/source/hls/playlist/HlsPlaylistParser.java
+++ b/library/hls/src/main/java/com/google/android/exoplayer2/source/hls/playlist/HlsPlaylistParser.java
@@ -30,6 +30,7 @@ import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.HashSet;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Queue;
@@ -174,6 +175,7 @@ public final class HlsPlaylistParser implements ParsingLoadable.Parser<HlsPlayli
 
   private static HlsMasterPlaylist parseMasterPlaylist(LineIterator iterator, String baseUri)
       throws IOException {
+    HashSet<String> variantUrls = new HashSet<>();
     ArrayList<HlsMasterPlaylist.HlsUrl> variants = new ArrayList<>();
     ArrayList<HlsMasterPlaylist.HlsUrl> audios = new ArrayList<>();
     ArrayList<HlsMasterPlaylist.HlsUrl> subtitles = new ArrayList<>();
@@ -251,11 +253,13 @@ public final class HlsPlaylistParser implements ParsingLoadable.Parser<HlsPlayli
           width = Format.NO_VALUE;
           height = Format.NO_VALUE;
         }
-        line = iterator.next();
-        Format format = Format.createVideoContainerFormat(Integer.toString(variants.size()),
-            MimeTypes.APPLICATION_M3U8, null, codecs, bitrate, width, height, Format.NO_VALUE, null,
-            0);
-        variants.add(new HlsMasterPlaylist.HlsUrl(line, format));
+        line = iterator.next(); // #EXT-X-STREAM-INF's URI.
+        if (variantUrls.add(line)) {
+          Format format = Format.createVideoContainerFormat(Integer.toString(variants.size()),
+              MimeTypes.APPLICATION_M3U8, null, codecs, bitrate, width, height, Format.NO_VALUE,
+              null, 0);
+          variants.add(new HlsMasterPlaylist.HlsUrl(line, format));
+        }
       }
     }
     if (noClosedCaptions) {