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From: Dan Minor <dminor@mozilla.com>
Date: Tue, 17 Sep 2019 06:47:00 +0000
Subject: Bug 1581193 - Fix devicechange event on Windows; r=achronop
This restores the code for generating devicechange events that was
accidentally removed as part of updating the Windows video capture code
in Bug 1552755.
Differential Revision: https://phabricator.services.mozilla.com/D46033
Mercurial Revision: https://hg.mozilla.org/mozilla-central/rev/840c4edafa021eeac6a7e6ae0e828d0adcfea92e
---
.../video_capture/windows/device_info_ds.cc | 39 +++++++++++++++++++
.../video_capture/windows/device_info_ds.h | 3 ++
2 files changed, 42 insertions(+)
diff --git a/modules/video_capture/windows/device_info_ds.cc b/modules/video_capture/windows/device_info_ds.cc
index fb8d55137f..8543dce746 100644
--- a/modules/video_capture/windows/device_info_ds.cc
+++ b/modules/video_capture/windows/device_info_ds.cc
@@ -20,6 +20,29 @@
namespace webrtc {
namespace videocapturemodule {
+LRESULT CALLBACK WndProc(HWND hWnd, UINT uiMsg, WPARAM wParam, LPARAM lParam)
+{
+ DeviceInfoDS* pParent;
+ if (uiMsg == WM_CREATE)
+ {
+ pParent = (DeviceInfoDS*)((LPCREATESTRUCT)lParam)->lpCreateParams;
+ SetWindowLongPtr(hWnd, GWLP_USERDATA, (LONG_PTR)pParent);
+ }
+ else if (uiMsg == WM_DESTROY)
+ {
+ SetWindowLongPtr(hWnd, GWLP_USERDATA, NULL);
+ }
+ else if (uiMsg == WM_DEVICECHANGE)
+ {
+ pParent = (DeviceInfoDS*)GetWindowLongPtr(hWnd, GWLP_USERDATA);
+ if (pParent)
+ {
+ pParent->DeviceChange();
+ }
+ }
+ return DefWindowProc(hWnd, uiMsg, wParam, lParam);
+}
+
// static
DeviceInfoDS* DeviceInfoDS::Create() {
DeviceInfoDS* dsInfo = new DeviceInfoDS();
@@ -77,6 +100,18 @@ DeviceInfoDS::DeviceInfoDS()
<< rtc::ToHex(hr);
}
}
+
+ _hInstance = reinterpret_cast<HINSTANCE>(GetModuleHandle(NULL));
+ _wndClass = {0};
+ _wndClass.lpfnWndProc = &WndProc;
+ _wndClass.lpszClassName = TEXT("DeviceInfoDS");
+ _wndClass.hInstance = _hInstance;
+
+ if (RegisterClass(&_wndClass)) {
+ _hwnd = CreateWindow(_wndClass.lpszClassName, NULL, 0, CW_USEDEFAULT,
+ CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL,
+ NULL, _hInstance, this);
+ }
}
DeviceInfoDS::~DeviceInfoDS() {
@@ -85,6 +120,10 @@ DeviceInfoDS::~DeviceInfoDS() {
if (_CoUninitializeIsRequired) {
CoUninitialize();
}
+ if (_hwnd != NULL) {
+ DestroyWindow(_hwnd);
+ }
+ UnregisterClass(_wndClass.lpszClassName, _hInstance);
}
int32_t DeviceInfoDS::Init() {
diff --git a/modules/video_capture/windows/device_info_ds.h b/modules/video_capture/windows/device_info_ds.h
index 1b52645cde..dc7b9b1a24 100644
--- a/modules/video_capture/windows/device_info_ds.h
+++ b/modules/video_capture/windows/device_info_ds.h
@@ -93,6 +93,9 @@ class DeviceInfoDS : public DeviceInfoImpl {
IEnumMoniker* _dsMonikerDevEnum;
bool _CoUninitializeIsRequired;
std::vector<VideoCaptureCapabilityWindows> _captureCapabilitiesWindows;
+ HWND _hwnd;
+ WNDCLASS _wndClass;
+ HINSTANCE _hInstance;
};
} // namespace videocapturemodule
} // namespace webrtc
--
2.34.1
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