From f36240eb3833935e1e4d951e8a88867e3a3a7237 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Mon, 17 Aug 2020 13:55:09 +0400
Subject: [PATCH] Check for at least one camera existance.

---
 Telegram/SourceFiles/calls/calls_call.cpp | 6 +++++-
 Telegram/lib_webrtc                       | 2 +-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/Telegram/SourceFiles/calls/calls_call.cpp b/Telegram/SourceFiles/calls/calls_call.cpp
index c2d2a9604..f23e83b23 100644
--- a/Telegram/SourceFiles/calls/calls_call.cpp
+++ b/Telegram/SourceFiles/calls/calls_call.cpp
@@ -24,6 +24,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "base/platform/base_platform_info.h"
 #include "calls/calls_panel.h"
 #include "webrtc/webrtc_video_track.h"
+#include "webrtc/webrtc_camera_utilities.h"
 #include "data/data_user.h"
 #include "data/data_session.h"
 #include "facades.h"
@@ -348,7 +349,10 @@ void Call::setupOutgoingVideo() {
 	const auto started = _videoOutgoing->state();
 	_videoOutgoing->stateValue(
 	) | rpl::start_with_next([=](Webrtc::VideoState state) {
-		if (_state.current() != State::Established
+		if (state != Webrtc::VideoState::Inactive
+			&& Webrtc::GetCamerasList().empty()) {
+			_videoOutgoing->setState(Webrtc::VideoState::Inactive);
+		} else if (_state.current() != State::Established
 			&& state != started
 			&& !_videoCapture) {
 			_videoOutgoing->setState(started);
diff --git a/Telegram/lib_webrtc b/Telegram/lib_webrtc
index 39234aa82..4d0f0b8ef 160000
--- a/Telegram/lib_webrtc
+++ b/Telegram/lib_webrtc
@@ -1 +1 @@
-Subproject commit 39234aa82a0bd0eceaf9b299a2debdb513ef7381
+Subproject commit 4d0f0b8ef41b7a7f8014cebb1dbc5549b06fde6f