From 4dc8ec1bbd2a6a24184ca280cb1d4d28cb950e57 Mon Sep 17 00:00:00 2001
From: Tangent Wantwight <tangent128@gmail.com>
Date: Mon, 10 Aug 2020 18:45:14 -0400
Subject: [PATCH] when disconnecting, clean up the header chunk so subsequent
 clients don't get a potentially incorrect initialization segment

---
 CHANGELOG.md   |  3 +++
 Cargo.lock     |  2 +-
 Cargo.toml     |  2 +-
 src/channel.rs | 10 ++++++++++
 4 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index cfd5163..f590dc6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## v0.3.1-dev
+- forget a channel's initialization segment when no transmitter is active. This improves behavior when a channel is occasionally used for streams with different codecs.
+
 ## v0.3.0
 - update internals to v0.2 of `warp` and `tokio`; no remaining code relies on `futures` 0.1
 
diff --git a/Cargo.lock b/Cargo.lock
index 7e2d3a4..703066e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1227,7 +1227,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "webmetro"
-version = "0.3.0-dev"
+version = "0.3.1-dev"
 dependencies = [
  "byteorder 1.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "bytes 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/Cargo.toml b/Cargo.toml
index ab42892..1dc41b5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "webmetro"
-version = "0.3.0-dev"
+version = "0.3.1-dev"
 authors = ["Tangent 128 <Tangent128@gmail.com>"]
 edition = "2018"
 
diff --git a/src/channel.rs b/src/channel.rs
index e52c4a5..d72c65f 100644
--- a/src/channel.rs
+++ b/src/channel.rs
@@ -57,6 +57,16 @@ impl Transmitter {
     }
 }
 
+impl Drop for Transmitter {
+    fn drop(&mut self) {
+        if let Ok(mut channel) = self.channel.lock() {
+            // when disconnecting, clean up the header chunk so subsequent
+            // clients don't get a potentially incorrect initialization segment
+            channel.header_chunk = None;
+        }
+    }
+}
+
 pub struct Listener {
     /// not used in operation, but its refcount keeps the channel alive when there's no Transmitter
     _channel: Handle,