changeset:   560838:7a5a1784b5d1
tag:         tip
parent:      560835:7184fb5a42fb
user:        Martin Stransky <stransky@redhat.com>
date:        Fri Nov 27 17:29:07 2020 +0100
files:       third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.h
description:
Bug 1678680 [PipeWire] Lock current_frame_ access as it can be used from multiple threads, r?dminor

Differential Revision: https://phabricator.services.mozilla.com/D98080


diff --git a/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc b/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc
--- a/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc
+++ b/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc
@@ -396,16 +396,17 @@ void BaseCapturerPipeWire::HandleBuffer(
   DesktopSize video_size_prev = video_size_;
     if (video_metadata_use_) {
     video_size_ = DesktopSize(video_metadata->region.size.width,
                               video_metadata->region.size.height);
   } else {
     video_size_ = desktop_size_;
   }
 
+  rtc::CritScope lock(&current_frame_lock_);
   if (!current_frame_ ||
       (video_metadata_use_ && !video_size_.equals(video_size_prev))) {
     current_frame_ =
       std::make_unique<uint8_t[]>
         (video_size_.width() * video_size_.height() * kBytesPerPixel);
   }
 
   const int32_t dstStride = video_size_.width() * kBytesPerPixel;
@@ -872,16 +873,17 @@ void BaseCapturerPipeWire::Start(Callbac
 }
 
 void BaseCapturerPipeWire::CaptureFrame() {
   if (portal_init_failed_) {
     callback_->OnCaptureResult(Result::ERROR_PERMANENT, nullptr);
     return;
   }
 
+  rtc::CritScope lock(&current_frame_lock_);
   if (!current_frame_) {
     callback_->OnCaptureResult(Result::ERROR_TEMPORARY, nullptr);
     return;
   }
 
   DesktopSize frame_size = desktop_size_;
   if (video_metadata_use_) {
     frame_size = video_size_;
diff --git a/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.h b/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.h
--- a/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.h
+++ b/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.h
@@ -79,16 +79,17 @@ class BaseCapturerPipeWire : public Desk
   guint sources_request_signal_id_ = 0;
   guint start_request_signal_id_ = 0;
 
   bool video_metadata_use_ = false;
   DesktopSize video_size_;
   DesktopSize desktop_size_ = {};
   DesktopCaptureOptions options_ = {};
 
+  rtc::CriticalSection current_frame_lock_;
   std::unique_ptr<uint8_t[]> current_frame_;
   Callback* callback_ = nullptr;
 
   bool portal_init_failed_ = false;
 
   void InitPortal();
   void InitPipeWire();