From e94d0634221564338852bf1d412adab3a7ad45aa Mon Sep 17 00:00:00 2001
From: Muaz Ahmad <mahmad2000@protonmail.com>
Date: Wed, 23 Aug 2023 23:13:07 +0500
Subject: [PATCH] proper reading of codecs done

---
 hls-player.js | 1 +
 mp4-tree.js   | 9 +++++++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/hls-player.js b/hls-player.js
index 5f55aa9..f84b2b3 100644
--- a/hls-player.js
+++ b/hls-player.js
@@ -51,6 +51,7 @@ class VideoLoader {
 	async prepare_buffer() {
 		let init_frag = await this.fetch_video('/vid/' + this.stream_key + '/init.mp4');
 		let mime = (new MP4Tree(init_frag)).get_mime();
+		console.log(mime);
 	}
 
 	async fetch_video(uri) {
diff --git a/mp4-tree.js b/mp4-tree.js
index aec4acf..18ef1aa 100644
--- a/mp4-tree.js
+++ b/mp4-tree.js
@@ -43,12 +43,17 @@ class MP4Tree {
 	
 	parse_avc1() {
 		this.parse_into('avc1', 86);
-		console.log(this.read_next_head());
+		this.parse_into('avcC', 8);
+		const avc_profile = (this.data.getUint32(this.idx) & 0xffffff).toString(16);
+		this.codecs.push('avc1.' + avc_profile);
 	}
 
 	parse_mp4a() {
 		this.parse_into('mp4a', 36);
-		console.log(this.read_next_head());
+		this.parse_into('esds', 12);
+		const oti = this.data.getUint8(this.idx + 13).toString(16);
+		const aot = (this.data.getUint8(this.idx + 31) >> 3).toString(10);
+		this.codecs.push(["mp4a", oti, aot].join('.'));
 	}
 
 	get_mime() {