fix(HLS): Fix disableAudio and disableVideo when loading a media playlist (#8642)

Author: avelad

lib/hls/hls_parser.js

@@ -939,18 +939,27 @@ shaka.hls.HlsParser = class {
       mediaPlaylistType = streamInfo.stream.type;
 
       // Wrap the stream from that stream info with a variant.
-      variants.push({
-        id: 0,
-        language: this.getLanguage_(languageValue),
-        disabledUntilTime: 0,
-        primary: true,
-        audio: mediaPlaylistType == 'audio' ? streamInfo.stream : null,
-        video: mediaPlaylistType == 'video' ? streamInfo.stream : null,
-        bandwidth: streamInfo.stream.bandwidth || 0,
-        allowedByApplication: true,
-        allowedByKeySystem: true,
-        decodingInfos: [],
-      });
+      let variantAllowed = true;
+      if (this.config_.disableAudio && streamInfo.type == 'audio') {
+        variantAllowed = false;
+      } else if (this.config_.disableVideo && streamInfo.type == 'video' &&
+          !streamInfo.stream.codecs.includes(',')) {
+        variantAllowed = false;
+      }
+      if (variantAllowed) {
+        variants.push({
+          id: 0,
+          language: this.getLanguage_(languageValue),
+          disabledUntilTime: 0,
+          primary: true,
+          audio: streamInfo.type == 'audio' ? streamInfo.stream : null,
+          video: streamInfo.type == 'video' ? streamInfo.stream : null,
+          bandwidth: streamInfo.stream.bandwidth || 0,
+          allowedByApplication: true,
+          allowedByKeySystem: true,
+          decodingInfos: [],
+        });
+      }
     } else {
       this.parseMasterVariables_(variablesTags);