From 84b4f1efd111321e4f3e5a87844790c4ec9b0b52 Mon Sep 17 00:00:00 2001
From: absidue <48293849+absidue@users.noreply.github.com>
Date: Sun, 14 May 2023 06:11:02 +0200
Subject: [PATCH] feat(toDash): Add audio track labels to the manifest when
 available (#402)

---
 src/utils/FormatUtils.ts | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/utils/FormatUtils.ts b/src/utils/FormatUtils.ts
index 91211c2b..a81ef42e 100644
--- a/src/utils/FormatUtils.ts
+++ b/src/utils/FormatUtils.ts
@@ -363,7 +363,12 @@ class FormatUtils {
             this.#el(document, 'Role', {
               schemeIdUri: 'urn:mpeg:dash:role:2011',
               value: role
-            })
+            }),
+            this.#el(document, 'Label', {
+              id: set_id.toString()
+            }, [
+              document.createTextNode(first_format.audio_track?.display_name as string)
+            ])
           );
 
           const set = this.#el(document, 'AdaptationSet', {
@@ -371,7 +376,9 @@ class FormatUtils {
             mimeType: mime_types[i].split(';')[0],
             startWithSAP: '1',
             subsegmentAlignment: 'true',
-            lang: first_format.language as string
+            lang: first_format.language as string,
+            // Non-standard attribute used by shaka instead of the standard Label element
+            label: first_format.audio_track?.display_name as string
           }, children);
 
           period.appendChild(set);