raven-rhel8/qt6/qt6-qtwebengine/qtwebengine-webrtc-dlopen-h264.patch

diff --git a/src/3rdparty/chromium/third_party/webrtc/modules/video_coding/BUILD.gn b/src/3rdparty/chromium/third_party/webrtc/modules/video_coding/BUILD.gn
index 8e3529974..ca7370599 100644
--- a/src/3rdparty/chromium/third_party/webrtc/modules/video_coding/BUILD.gn
+++ b/src/3rdparty/chromium/third_party/webrtc/modules/video_coding/BUILD.gn
@@ -7,6 +7,7 @@
 # be found in the AUTHORS file in the root of the source tree.

 import("//third_party/libaom/options.gni")
+import("//tools/generate_stubs/rules.gni")
 import("../../webrtc.gni")

 rtc_library("encoded_frame") {
@@ -461,6 +462,17 @@ rtc_library("video_coding_utility") {
   ]
 }

+if (rtc_use_h264 && rtc_dlopen_openh264) {
+  # When OpenH264 is not directly linked, use stubs to allow for dlopening of
+  # the binary.
+  generate_stubs("openh264_stubs") {
+    configs = [ "../../:common_config" ]
+    extra_header = "codecs/h264/openh264_stub_header.fragment"
+    output_name = "codecs/h264/openh264_stubs"
+    sigs = [ "codecs/h264/openh264.sigs" ]
+  }
+}
+
 rtc_library("webrtc_h264") {
   visibility = [ "*" ]
   sources = [
@@ -507,10 +519,15 @@ rtc_library("webrtc_h264") {
   ]

   if (rtc_use_h264) {
-    deps += [
-      "//third_party/ffmpeg",
-      "//third_party/openh264:encoder",
-    ]
+    deps += [ "//third_party/ffmpeg" ]
+
+    if (rtc_dlopen_openh264) {
+      defines = [ "WEBRTC_DLOPEN_OPENH264" ]
+      deps += [ ":openh264_stubs" ]
+    } else {
+      deps += [ "//third_party/openh264:encoder" ]
+    }
+
     if (!build_with_mozilla) {
       deps += [ "../../media:rtc_media_base" ]
     }
diff --git a/src/3rdparty/chromium/third_party/webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.cc b/src/3rdparty/chromium/third_party/webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.cc
index b6023ac50..228486870 100644
--- a/src/3rdparty/chromium/third_party/webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.cc
+++ b/src/3rdparty/chromium/third_party/webrtc/modules/video_coding/codecs/h264/h264_encoder_impl.cc
@@ -39,10 +39,22 @@
 #include "third_party/openh264/src/codec/api/wels/codec_def.h"
 #include "third_party/openh264/src/codec/api/wels/codec_ver.h"

+#if defined(WEBRTC_DLOPEN_OPENH264)
+#include "modules/video_coding/codecs/h264/openh264_stubs.h"
+#endif  // defined(WEBRTC_DLOPEN_OPENH264)
+
 namespace webrtc {

 namespace {

+#if defined(WEBRTC_DLOPEN_OPENH264)
+using third_party_webrtc_modules_video_coding_codecs_h264::InitializeStubs;
+using third_party_webrtc_modules_video_coding_codecs_h264::kModuleOpenh264;
+using third_party_webrtc_modules_video_coding_codecs_h264::StubPathMap;
+
+static constexpr char kOpenH264Lib[] = "libopenh264.so.7";
+#endif
+
 const bool kOpenH264EncoderDetailedLogging = false;

 // QP scaling thresholds.
@@ -198,6 +210,15 @@ H264EncoderImpl::~H264EncoderImpl() {

 int32_t H264EncoderImpl::InitEncode(const VideoCodec* inst,
                                     const VideoEncoder::Settings& settings) {
+#if defined(WEBRTC_DLOPEN_OPENH264)
+  StubPathMap paths;
+  paths[kModuleOpenh264].push_back(kOpenH264Lib);
+
+  static bool result = InitializeStubs(paths);
+  if (!result)
+    return WEBRTC_VIDEO_CODEC_UNINITIALIZED;
+#endif
+
   ReportInit();
   if (!inst || inst->codecType != kVideoCodecH264) {
     ReportError();
diff --git a/src/3rdparty/chromium/third_party/webrtc/modules/video_coding/codecs/h264/openh264.sigs b/src/3rdparty/chromium/third_party/webrtc/modules/video_coding/codecs/h264/openh264.sigs
new file mode 100644
index 000000000..4924f8e9a
--- /dev/null
+++ b/src/3rdparty/chromium/third_party/webrtc/modules/video_coding/codecs/h264/openh264.sigs
@@ -0,0 +1,14 @@
+// Copyright 2022 The WebRTC project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//------------------------------------------------
+// Functions from OpenH264.
+//------------------------------------------------
+int WelsCreateSVCEncoder(ISVCEncoder **ppEncoder);
+void WelsDestroySVCEncoder(ISVCEncoder *pEncoder);
+int WelsGetDecoderCapability(SDecoderCapability *pDecCapability);
+long WelsCreateDecoder(ISVCDecoder **ppDecoder);
+void WelsDestroyDecoder(ISVCDecoder *pDecoder);
+OpenH264Version WelsGetCodecVersion(void);
+void WelsGetCodecVersionEx(OpenH264Version *pVersion);
diff --git a/src/3rdparty/chromium/third_party/webrtc/modules/video_coding/codecs/h264/openh264_stub_header.fragment b/src/3rdparty/chromium/third_party/webrtc/modules/video_coding/codecs/h264/openh264_stub_header.fragment
new file mode 100644
index 000000000..9bc0a7cbe
--- /dev/null
+++ b/src/3rdparty/chromium/third_party/webrtc/modules/video_coding/codecs/h264/openh264_stub_header.fragment
@@ -0,0 +1,11 @@
+// The extra include header needed in the generated stub file for defining
+// various OpenH264 types.
+
+extern "C" {
+
+#include "third_party/openh264/src/codec/api/wels/codec_api.h"
+#include "third_party/openh264/src/codec/api/wels/codec_app_def.h"
+#include "third_party/openh264/src/codec/api/wels/codec_def.h"
+#include "third_party/openh264/src/codec/api/wels/codec_ver.h"
+
+}
diff --git a/src/3rdparty/chromium/third_party/webrtc/webrtc.gni b/src/3rdparty/chromium/third_party/webrtc/webrtc.gni
index 8dfcc9d24..0a27fd2d6 100644
--- a/src/3rdparty/chromium/third_party/webrtc/webrtc.gni
+++ b/src/3rdparty/chromium/third_party/webrtc/webrtc.gni
@@ -181,6 +181,10 @@ declare_args() {
   rtc_use_h264 =
       proprietary_codecs && !is_android && !is_ios && !(is_win && !is_clang)

+  # Allow to use OpenH264 on systems where OpenH264 cannot be installed by
+  # default due to licensing, but can be installed later from other sources.
+  rtc_dlopen_openh264 = false
+
   # Enable this flag to make webrtc::Mutex be implemented by absl::Mutex.
   rtc_use_absl_mutex = false

diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 4153ce180..afaa9dcb1 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -418,6 +418,9 @@ foreach(arch ${archs})
                 use_udev=true
                 is_cfi=false
                 use_ozone=true
+                media_use_openh264=false
+                rtc_use_h264=true
+                rtc_dlopen_openh264=true
                 ozone_auto_platforms=false
                 ozone_platform_headless=false
                 ozone_platform_external=true