From 837f166e3234c500aac0d19acc7839c2f5f8c521 Mon Sep 17 00:00:00 2001
From: Cyril Concolato <cconcolato@netflix.com>
Date: Fri, 18 Mar 2022 14:36:27 -0700
Subject: [PATCH] add Opus dOps box parsing

---
 src/parsing/dOps.js | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 src/parsing/dOps.js

diff --git a/src/parsing/dOps.js b/src/parsing/dOps.js
new file mode 100644
index 00000000..66675ea7
--- /dev/null
+++ b/src/parsing/dOps.js
@@ -0,0 +1,17 @@
+BoxParser.createBoxCtor("dOps", function(stream) {
+	this.Version = stream.readUint8();
+	this.OutputChannelCount = stream.readUint8();
+	this.PreSkip = stream.readUint16();
+	this.InputSampleRate = stream.readUint32();
+	this.OutputGain = stream.readInt16();
+	this.ChannelMappingFamily = stream.readUint8();
+	if (this.ChannelMappingFamily !== 0) {
+		this.StreamCount = stream.readUint8();
+		this.CoupledCount = stream.readUint8();
+		this.ChannelMapping = [];
+		for (var i = 0; i < this.OutputChannelCount; i++) {
+			this.ChannelMapping[i] = stream.readUint8();
+		}
+	}
+});
+