From cf1cbf49c693a80f6924dcc58f1fd7e37925c4dd Mon Sep 17 00:00:00 2001
From: brandonocasey <brandonocasey@gmail.com>
Date: Tue, 19 Jan 2021 14:07:16 -0500
Subject: [PATCH] feat: add support for #EXT-X-RENDITION-REPORT

https://developer.apple.com/documentation/http_live_streaming/enabling_low-latency_hls#3282435
https://tools.ietf.org/html/draft-pantos-hls-rfc8216bis-08#section-4.4.5.4
---
 src/parse-stream.js                | 17 +++++++++++++++++
 src/parser.js                      |  4 ++++
 test/fixtures/m3u8/llhls.json      |  4 ++++
 test/fixtures/m3u8/llhlsDelta.json |  4 ++++
 4 files changed, 29 insertions(+)

diff --git a/src/parse-stream.js b/src/parse-stream.js
index 8890680..b74b2f8 100644
--- a/src/parse-stream.js
+++ b/src/parse-stream.js
@@ -443,6 +443,23 @@ export default class ParseStream extends Stream {
         return;
       }
 
+      match = (/^#EXT-X-RENDITION-REPORT:(.*)$/).exec(newLine);
+      if (match && match[1]) {
+        event = {
+          type: 'tag',
+          tagType: 'rendition-report'
+        };
+        event.attributes = parseAttributes(match[1]);
+        ['LAST-MSN', 'LAST-PART'].forEach(function(key) {
+          if (event.attributes.hasOwnProperty(key)) {
+            event.attributes[key] = parseInt(event.attributes[key], 10);
+          }
+        });
+
+        this.trigger('data', event);
+        return;
+      }
+
       // unknown tag type
       this.trigger('data', {
         type: 'tag',
diff --git a/src/parser.js b/src/parser.js
index de67f5f..c1675bf 100644
--- a/src/parser.js
+++ b/src/parser.js
@@ -383,6 +383,10 @@ export default class Parser extends Stream {
             },
             'cue-in'() {
               currentUri.cueIn = entry.data;
+            },
+            'rendition-report'() {
+              this.manifest.renditionReports = this.manifest.renditionReports || [];
+              this.manifest.renditionReports.push(entry.attributes);
             }
           })[entry.tagType] || noop).call(self);
         },
diff --git a/test/fixtures/m3u8/llhls.json b/test/fixtures/m3u8/llhls.json
index 3d82211..99aaa01 100644
--- a/test/fixtures/m3u8/llhls.json
+++ b/test/fixtures/m3u8/llhls.json
@@ -5,6 +5,10 @@
   "discontinuitySequence": 0,
   "discontinuityStarts": [],
   "mediaSequence": 266,
+  "renditionReports": [
+    {"LAST-MSN": 273, "LAST-PART": 2, "URI": "../1M/waitForMSN.php"},
+    {"LAST-MSN": 273, "LAST-PART": 1, "URI": "../4M/waitForMSN.php"}
+  ],
   "segments": [
     {
       "dateTimeObject": new Date("2019-02-14T02:13:36.106Z"),
diff --git a/test/fixtures/m3u8/llhlsDelta.json b/test/fixtures/m3u8/llhlsDelta.json
index 0528896..e3c3b48 100644
--- a/test/fixtures/m3u8/llhlsDelta.json
+++ b/test/fixtures/m3u8/llhlsDelta.json
@@ -5,6 +5,10 @@
   "discontinuitySequence": 0,
   "discontinuityStarts": [],
   "mediaSequence": 266,
+  "renditionReports": [
+    {"LAST-MSN": 273, "LAST-PART": 3, "URI": "../1M/waitForMSN.php"},
+    {"LAST-MSN": 273, "LAST-PART": 3, "URI": "../4M/waitForMSN.php"}
+  ],
   "segments": [
     {
       "duration": 4.00008,