From bd5da6bdcf8dc5aa21585318f73f2b3437724eb6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C3=81lvaro=20Velad=20Galv=C3=A1n?= <alvaro.velad@mirada.tv>
Date: Tue, 10 Aug 2021 19:04:24 +0200
Subject: [PATCH] fix: Add support to file type in MediaCapabilities polyfill
 (#3569)

Issue: #3530
---
 lib/polyfill/media_capabilities.js | 45 ++++++++++++++++++++++--------
 1 file changed, 33 insertions(+), 12 deletions(-)

diff --git a/lib/polyfill/media_capabilities.js b/lib/polyfill/media_capabilities.js
index 7ce154e5ae..346e9ba463 100644
--- a/lib/polyfill/media_capabilities.js
+++ b/lib/polyfill/media_capabilities.js
@@ -63,21 +63,42 @@ shaka.polyfill.MediaCapabilities = class {
       return res;
     }
 
-    // Use 'MediaSource.isTypeSupported' to check if the stream is supported.
-    if (mediaDecodingConfig['video']) {
-      const contentType = mediaDecodingConfig['video'].contentType;
-      const isSupported = MediaSource.isTypeSupported(contentType);
-      if (!isSupported) {
-        return res;
+    if (mediaDecodingConfig.type == 'media-source') {
+      // Use 'MediaSource.isTypeSupported' to check if the stream is supported.
+      if (mediaDecodingConfig['video']) {
+        const contentType = mediaDecodingConfig['video'].contentType;
+        const isSupported = MediaSource.isTypeSupported(contentType);
+        if (!isSupported) {
+          return res;
+        }
+      }
+
+      if (mediaDecodingConfig['audio']) {
+        const contentType = mediaDecodingConfig['audio'].contentType;
+        const isSupported = MediaSource.isTypeSupported(contentType);
+        if (!isSupported) {
+          return res;
+        }
+      }
+    } else if (mediaDecodingConfig.type == 'file') {
+      if (mediaDecodingConfig['video']) {
+        const contentType = mediaDecodingConfig['video'].contentType;
+        const isSupported = shaka.util.Platform.supportsMediaType(contentType);
+        if (!isSupported) {
+          return res;
+        }
       }
-    }
 
-    if (mediaDecodingConfig['audio']) {
-      const contentType = mediaDecodingConfig['audio'].contentType;
-      const isSupported = MediaSource.isTypeSupported(contentType);
-      if (!isSupported) {
-        return res;
+      if (mediaDecodingConfig['audio']) {
+        const contentType = mediaDecodingConfig['audio'].contentType;
+        const isSupported = shaka.util.Platform.supportsMediaType(contentType);
+        if (!isSupported) {
+          return res;
+        }
       }
+    } else {
+      // Otherwise not supported.
+      return res;
     }
 
     if (!mediaDecodingConfig.keySystemConfiguration) {