Add support for window sharing

2 files changed, 417 insertions, 10 deletions

diff --git a/firefox-pipewire.patch b/firefox-pipewire.patch
index 7233a73..2e12bf5 100644
--- a/firefox-pipewire.patch
+++ b/firefox-pipewire.patch
@@ -1,6 +1,7 @@
-diff -up firefox-68.0/config/system-headers.mozbuild.firefox-pipewire firefox-68.0/config/system-headers.mozbuild
---- firefox-68.0/config/system-headers.mozbuild.firefox-pipewire	2019-07-01 22:30:26.000000000 +0200
-+++ firefox-68.0/config/system-headers.mozbuild	2019-07-08 15:26:15.397161627 +0200
+diff --git a/config/system-headers.mozbuild b/config/system-headers.mozbuild
+index 2081d0c683a4..641133bf1ea4 100644
+--- a/config/system-headers.mozbuild
++++ b/config/system-headers.mozbuild
 @@ -314,6 +314,7 @@ system_headers = [
      'Gestalt.h',
      'getopt.h',
@@ -17,9 +18,10 @@ diff -up firefox-68.0/config/system-headers.mozbuild.firefox-pipewire firefox-68
      'pixman.h',
      'pk11func.h',
      'pk11pqg.h',
-diff -up firefox-68.0/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build.firefox-pipewire firefox-68.0/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build
---- firefox-68.0/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build.firefox-pipewire	2019-07-01 22:30:33.000000000 +0200
-+++ firefox-68.0/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build	2019-07-08 15:26:15.397161627 +0200
+diff --git a/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build b/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build
+index 90b40431c7e4..03581f7c38b5 100644
+--- a/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build
++++ b/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build
 @@ -194,6 +194,28 @@ if CONFIG["OS_TARGET"] == "Linux":
          "/media/webrtc/trunk/webrtc/modules/desktop_capture/window_capturer_linux.cc"
      ]
@@ -49,9 +51,10 @@ diff -up firefox-68.0/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_
  if CONFIG["OS_TARGET"] == "NetBSD":
  
      DEFINES["USE_X11"] = "1"
-diff -up firefox-68.0/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_options.h.firefox-pipewire firefox-68.0/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_options.h
---- firefox-68.0/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_options.h.firefox-pipewire	2019-07-08 16:42:13.936254926 +0200
-+++ firefox-68.0/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_options.h	2019-07-08 16:42:17.509264974 +0200
+diff --git a/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_options.h b/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_options.h
+index 1eb8ead26efa..316468eed1fc 100644
+--- a/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_options.h
++++ b/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_capture_options.h
 @@ -141,7 +141,7 @@ class DesktopCaptureOptions {
    bool disable_effects_ = true;
    bool detect_updated_region_ = false;
@@ -61,3 +64,404 @@ diff -up firefox-68.0/media/webrtc/trunk/webrtc/modules/desktop_capture/desktop_
  #endif
  };
  
+diff --git a/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc b/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc
+index 379341c833de..7a1ffa204ddf 100644
+--- a/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc
++++ b/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc
+@@ -18,6 +18,11 @@
+ #include <spa/param/video/raw-utils.h>
+ #include <spa/support/type-map.h>
+ 
++#include <linux/dma-buf.h>
++#include <sys/mman.h>
++#include <sys/ioctl.h>
++#include <sys/syscall.h>
++
+ #include <memory>
+ #include <utility>
+ 
+@@ -36,6 +41,26 @@ const char kSessionInterfaceName[] = "org.freedesktop.portal.Session";
+ const char kRequestInterfaceName[] = "org.freedesktop.portal.Request";
+ const char kScreenCastInterfaceName[] = "org.freedesktop.portal.ScreenCast";
+ 
++
++static void BaseCapturerPipeWire::SyncDmaBuf(int fd, uint64_t start_or_end) {
++  struct dma_buf_sync sync = { 0 };
++
++  sync.flags = start_or_end | DMA_BUF_SYNC_READ;
++
++  while(true) {
++    int ret;
++    ret = ioctl (fd, DMA_BUF_IOCTL_SYNC, &sync);
++    if (ret == -1 && errno == EINTR) {
++      continue;
++    } else if (ret == -1) {
++      RTC_LOG(LS_ERROR) << "Failed to synchronize DMA buffer: " << g_strerror(errno);
++      break;
++    } else {
++      break;
++    }
++  }
++}
++
+ // static
+ void BaseCapturerPipeWire::OnStateChanged(void* data,
+                                           pw_remote_state old_state,
+@@ -112,7 +137,7 @@ void BaseCapturerPipeWire::OnStreamFormatChanged(void* data,
+   auto builder = spa_pod_builder{buffer, sizeof(buffer)};
+ 
+   // Setup buffers and meta header for new format.
+-  const struct spa_pod* params[2];
++  const struct spa_pod* params[3];
+   params[0] = reinterpret_cast<spa_pod*>(spa_pod_builder_object(
+       &builder,
+       // id to enumerate buffer requirements
+@@ -141,8 +166,14 @@ void BaseCapturerPipeWire::OnStreamFormatChanged(void* data,
+       // Size: size of the metadata, specified as integer (i)
+       ":", that->pw_core_type_->param_meta.size, "i",
+       sizeof(struct spa_meta_header)));
+-
+-  pw_stream_finish_format(that->pw_stream_, /*res=*/0, params, /*n_params=*/2);
++  params[2] = reinterpret_cast<spa_pod*>(
++      spa_pod_builder_object(&builder, that->pw_core_type_->param.idMeta,
++                             that->pw_core_type_->param_meta.Meta, ":",
++                             that->pw_core_type_->param_meta.type, "I",
++                             that->pw_core_type_->meta.VideoCrop, ":",
++                             that->pw_core_type_->param_meta.size, "i",
++                             sizeof(struct spa_meta_video_crop)));
++  pw_stream_finish_format(that->pw_stream_, /*res=*/0, params, /*n_params=*/3);
+ }
+ 
+ // static
+@@ -150,15 +181,21 @@ void BaseCapturerPipeWire::OnStreamProcess(void* data) {
+   BaseCapturerPipeWire* that = static_cast<BaseCapturerPipeWire*>(data);
+   RTC_DCHECK(that);
+ 
+-  pw_buffer* buf = nullptr;
++  struct pw_buffer *next_buffer;
++  struct pw_buffer *buffer = nullptr;
+ 
+-  if (!(buf = pw_stream_dequeue_buffer(that->pw_stream_))) {
+-    return;
++  next_buffer = pw_stream_dequeue_buffer(that->pw_stream_);
++  while (next_buffer) {
++    buffer = next_buffer;
++    next_buffer = pw_stream_dequeue_buffer(that->pw_stream_);
++
++    if (next_buffer)
++      pw_stream_queue_buffer (that->pw_stream_, buffer);
+   }
+ 
+-  that->HandleBuffer(buf);
++  that->HandleBuffer(buffer);
+ 
+-  pw_stream_queue_buffer(that->pw_stream_, buf);
++  pw_stream_queue_buffer(that->pw_stream_, buffer);
+ }
+ 
+ BaseCapturerPipeWire::BaseCapturerPipeWire(CaptureSourceType source_type)
+@@ -197,10 +234,6 @@ BaseCapturerPipeWire::~BaseCapturerPipeWire() {
+     pw_loop_destroy(pw_loop_);
+   }
+ 
+-  if (current_frame_) {
+-    free(current_frame_);
+-  }
+-
+   if (start_request_signal_id_) {
+     g_dbus_connection_signal_unsubscribe(connection_, start_request_signal_id_);
+   }
+@@ -332,8 +365,7 @@ void BaseCapturerPipeWire::CreateReceivingStream() {
+   pw_stream_add_listener(pw_stream_, &spa_stream_listener_, &pw_stream_events_,
+                          this);
+   pw_stream_flags flags = static_cast<pw_stream_flags>(
+-      PW_STREAM_FLAG_AUTOCONNECT | PW_STREAM_FLAG_INACTIVE |
+-      PW_STREAM_FLAG_MAP_BUFFERS);
++      PW_STREAM_FLAG_AUTOCONNECT | PW_STREAM_FLAG_INACTIVE);
+   if (pw_stream_connect(pw_stream_, PW_DIRECTION_INPUT, /*port_path=*/nullptr,
+                         flags, params,
+                         /*n_params=*/1) != 0) {
+@@ -344,15 +376,75 @@ void BaseCapturerPipeWire::CreateReceivingStream() {
+ }
+ 
+ void BaseCapturerPipeWire::HandleBuffer(pw_buffer* buffer) {
++  struct spa_meta_video_crop* video_crop;
+   spa_buffer* spaBuffer = buffer->buffer;
+-  void* src = nullptr;
++  uint8_t *map = nullptr;
++  uint8_t* src = nullptr;
++  uint8_t* dst = nullptr;
++
++  if (spaBuffer->datas[0].chunk->size == 0) {
++    map = nullptr;
++    src = nullptr;
++  } else if (spaBuffer->datas[0].type == pw_core_type_->data.MemFd) {
++    map = mmap(nullptr, spaBuffer->datas[0].maxsize + spaBuffer->datas[0].mapoffset,
++               PROT_READ, MAP_PRIVATE, spaBuffer->datas[0].fd, 0);
++    src = SPA_MEMBER(map, spaBuffer->datas[0].mapoffset, uint8_t);
++  } else if (spaBuffer->datas[0].type == pw_core_type_->data.DmaBuf) {
++    int fd;
++    fd = spaBuffer->datas[0].fd;
++
++    map = mmap (nullptr, spaBuffer->datas[0].maxsize + spaBuffer->datas[0].mapoffset,
++                PROT_READ, MAP_PRIVATE, fd, 0);
++    SyncDmaBuf(fd, DMA_BUF_SYNC_START);
++
++    src = SPA_MEMBER (map, spaBuffer->datas[0].mapoffset, uint8_t);
++  } else if (spaBuffer->datas[0].type == pw_core_type_->data.MemPtr) {
++    map = nullptr;
++    src = spaBuffer->datas[0].data;
++  } else {
++    return;
++  }
+ 
+-  if (!(src = spaBuffer->datas[0].data)) {
++  if (!src) {
+     return;
+   }
+ 
+-  uint32_t maxSize = spaBuffer->datas[0].maxsize;
+-  int32_t srcStride = spaBuffer->datas[0].chunk->stride;
++  DesktopSize prev_crop_size = video_crop_size_.value_or(DesktopSize(0, 0));
++
++  if ((video_crop = static_cast<struct spa_meta_video_crop*>(
++           spa_buffer_find_meta(spaBuffer, pw_core_type_->meta.VideoCrop)))) {
++    RTC_DCHECK(video_crop->width <= desktop_size_.width() &&
++               video_crop->height <= desktop_size_.height());
++    if ((video_crop->width != desktop_size_.width() ||
++        video_crop->height != desktop_size_.height()) && video_crop->width && video_crop->height) {
++      video_crop_size_ = DesktopSize(video_crop->width, video_crop->height);
++    } else {
++      video_crop_size_.reset();
++    }
++  } else {
++    video_crop_size_.reset();
++  }
++
++  size_t frame_size;
++  if (video_crop_size_) {
++    frame_size =
++        video_crop_size_->width() * video_crop_size_->height() * kBytesPerPixel;
++  } else {
++    frame_size =
++        desktop_size_.width() * desktop_size_.height() * kBytesPerPixel;
++  }
++
++  if (!current_frame_ ||
++      (video_crop_size_ && !video_crop_size_->equals(prev_crop_size))) {
++    current_frame_ = std::make_unique<uint8_t[]>(frame_size);
++  }
++  RTC_DCHECK(current_frame_ != nullptr);
++
++  const int32_t dstStride = video_crop_size_
++                                ? video_crop_size_->width() * kBytesPerPixel
++                                : desktop_size_.width() * kBytesPerPixel;
++  const int32_t srcStride = spaBuffer->datas[0].chunk->stride;
++
+   if (srcStride != (desktop_size_.width() * kBytesPerPixel)) {
+     RTC_LOG(LS_ERROR) << "Got buffer with stride different from screen stride: "
+                       << srcStride
+@@ -361,21 +453,39 @@ void BaseCapturerPipeWire::HandleBuffer(pw_buffer* buffer) {
+     return;
+   }
+ 
+-  if (!current_frame_) {
+-    current_frame_ = static_cast<uint8_t*>(malloc(maxSize));
++  dst = current_frame_.get();
++
++  // Adjust source content based on crop video position
++  if (video_crop_size_ &&
++      (video_crop->y + video_crop_size_->height() <= desktop_size_.height())) {
++    for (int i = 0; i < video_crop->y; ++i) {
++      src += srcStride;
++    }
++  }
++  const int xOffset =
++      video_crop_size_ && (video_crop->x + video_crop_size_->width() <=
++                           desktop_size_.width())
++          ? video_crop->x * kBytesPerPixel
++          : 0;
++  const int height = video_crop_size_ ? video_crop_size_->height() : desktop_size_.height();
++  for (int i = 0; i < height; ++i) {
++    // Adjust source content based on crop video position if needed
++    src += xOffset;
++    std::memcpy(dst, src, dstStride);
++    // If both sides decided to go with the RGBx format we need to convert it to
++    // BGRx to match color format expected by WebRTC.
++    if (spa_video_format_->format == pw_type_->video_format.RGBx) {
++      ConvertRGBxToBGRx(dst, dstStride);
++    }
++    src += srcStride - xOffset;
++    dst += dstStride;
+   }
+-  RTC_DCHECK(current_frame_ != nullptr);
+ 
+-  // If both sides decided to go with the RGBx format we need to convert it to
+-  // BGRx to match color format expected by WebRTC.
+-  if (spa_video_format_->format == pw_type_->video_format.RGBx) {
+-    uint8_t* tempFrame = static_cast<uint8_t*>(malloc(maxSize));
+-    std::memcpy(tempFrame, src, maxSize);
+-    ConvertRGBxToBGRx(tempFrame, maxSize);
+-    std::memcpy(current_frame_, tempFrame, maxSize);
+-    free(tempFrame);
+-  } else {
+-    std::memcpy(current_frame_, src, maxSize);
++  if (map) {
++    if (spaBuffer->datas[0].type == pw_core_type_->data.DmaBuf) {
++      SyncDmaBuf(spaBuffer->datas[0].fd, DMA_BUF_SYNC_END);
++    }
++    munmap(map, spaBuffer->datas[0].maxsize + spaBuffer->datas[0].mapoffset);
+   }
+ }
+ 
+@@ -813,10 +923,12 @@ void BaseCapturerPipeWire::CaptureFrame() {
+     return;
+   }
+ 
+-  std::unique_ptr<DesktopFrame> result(new BasicDesktopFrame(desktop_size_));
++  DesktopSize frame_size = video_crop_size_.value_or(desktop_size_);
++
++  std::unique_ptr<DesktopFrame> result(new BasicDesktopFrame(frame_size));
+   result->CopyPixelsFrom(
+-      current_frame_, (desktop_size_.width() * kBytesPerPixel),
+-      DesktopRect::MakeWH(desktop_size_.width(), desktop_size_.height()));
++      current_frame_.get(), (frame_size.width() * kBytesPerPixel),
++      DesktopRect::MakeWH(frame_size.width(), frame_size.height()));
+   if (!result) {
+     callback_->OnCaptureResult(Result::ERROR_TEMPORARY, nullptr);
+     return;
+@@ -837,4 +949,22 @@ bool BaseCapturerPipeWire::SelectSource(SourceId id) {
+   return true;
+ }
+ 
++// static
++std::unique_ptr<DesktopCapturer>
++BaseCapturerPipeWire::CreateRawScreenCapturer(
++    const DesktopCaptureOptions& options) {
++  std::unique_ptr<BaseCapturerPipeWire> capturer =
++      std::make_unique<BaseCapturerPipeWire>(BaseCapturerPipeWire::CaptureSourceType::kAny);
++  return std::move(capturer);}
++
++// static
++std::unique_ptr<DesktopCapturer>
++BaseCapturerPipeWire::CreateRawWindowCapturer(
++    const DesktopCaptureOptions& options) {
++
++  std::unique_ptr<BaseCapturerPipeWire> capturer =
++      std::make_unique<BaseCapturerPipeWire>(BaseCapturerPipeWire::CaptureSourceType::kAny);
++  return std::move(capturer);
++}
++
+ }  // namespace webrtc
+diff --git a/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.h b/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.h
+index 56b101acbaa6..56af57891379 100644
+--- a/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.h
++++ b/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.h
+@@ -32,7 +32,11 @@ class PipeWireType {
+ 
+ class BaseCapturerPipeWire : public DesktopCapturer {
+  public:
+-  enum CaptureSourceType { Screen = 1, Window };
++  enum CaptureSourceType : uint32_t {
++    kScreen = 0b01,
++    kWindow = 0b10,
++    kAny = 0b11
++  };
+ 
+   explicit BaseCapturerPipeWire(CaptureSourceType source_type);
+   ~BaseCapturerPipeWire() override;
+@@ -43,6 +47,12 @@ class BaseCapturerPipeWire : public DesktopCapturer {
+   bool GetSourceList(SourceList* sources) override;
+   bool SelectSource(SourceId id) override;
+ 
++  static std::unique_ptr<DesktopCapturer> CreateRawScreenCapturer(
++      const DesktopCaptureOptions& options);
++
++  static std::unique_ptr<DesktopCapturer> CreateRawWindowCapturer(
++      const DesktopCaptureOptions& options);
++
+  private:
+   // PipeWire types -->
+   pw_core* pw_core_ = nullptr;
+@@ -64,7 +74,7 @@ class BaseCapturerPipeWire : public DesktopCapturer {
+   gint32 pw_fd_ = -1;
+ 
+   CaptureSourceType capture_source_type_ =
+-      BaseCapturerPipeWire::CaptureSourceType::Screen;
++      BaseCapturerPipeWire::CaptureSourceType::kAny;
+ 
+   // <-- end of PipeWire types
+ 
+@@ -78,10 +88,11 @@ class BaseCapturerPipeWire : public DesktopCapturer {
+   guint sources_request_signal_id_ = 0;
+   guint start_request_signal_id_ = 0;
+ 
++  std::optional<DesktopSize> video_crop_size_ = std::nullopt;
+   DesktopSize desktop_size_ = {};
+   DesktopCaptureOptions options_ = {};
+ 
+-  uint8_t* current_frame_ = nullptr;
++  std::unique_ptr<uint8_t[]> current_frame_;
+   Callback* callback_ = nullptr;
+ 
+   bool portal_init_failed_ = false;
+@@ -95,6 +106,7 @@ class BaseCapturerPipeWire : public DesktopCapturer {
+ 
+   void ConvertRGBxToBGRx(uint8_t* frame, uint32_t size);
+ 
++  static void SyncDmaBuf(int fd, uint64_t start_or_end);
+   static void OnStateChanged(void* data,
+                              pw_remote_state old_state,
+                              pw_remote_state state,
+diff --git a/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/screen_capturer_pipewire.cc b/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/screen_capturer_pipewire.cc
+index 26956fc67dc8..3813d697bb38 100644
+--- a/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/screen_capturer_pipewire.cc
++++ b/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/screen_capturer_pipewire.cc
+@@ -15,7 +15,7 @@
+ namespace webrtc {
+ 
+ ScreenCapturerPipeWire::ScreenCapturerPipeWire()
+-    : BaseCapturerPipeWire(BaseCapturerPipeWire::CaptureSourceType::Screen) {}
++    : BaseCapturerPipeWire(BaseCapturerPipeWire::CaptureSourceType::kScreen) {}
+ ScreenCapturerPipeWire::~ScreenCapturerPipeWire() {}
+ 
+ // static
+diff --git a/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/window_capturer_pipewire.cc b/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/window_capturer_pipewire.cc
+index 35436475cb4d..c43a1f1a0c4e 100644
+--- a/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/window_capturer_pipewire.cc
++++ b/media/webrtc/trunk/webrtc/modules/desktop_capture/linux/window_capturer_pipewire.cc
+@@ -15,7 +15,7 @@
+ namespace webrtc {
+ 
+ WindowCapturerPipeWire::WindowCapturerPipeWire()
+-    : BaseCapturerPipeWire(BaseCapturerPipeWire::CaptureSourceType::Window) {}
++    : BaseCapturerPipeWire(BaseCapturerPipeWire::CaptureSourceType::kWindow) {}
+ WindowCapturerPipeWire::~WindowCapturerPipeWire() {}
+ 
+ // static
+diff --git a/media/webrtc/trunk/webrtc/modules/desktop_capture/screen_capturer_linux.cc b/media/webrtc/trunk/webrtc/modules/desktop_capture/screen_capturer_linux.cc
+index cf8a9dd0e0db..d27fab8d28d9 100644
+--- a/media/webrtc/trunk/webrtc/modules/desktop_capture/screen_capturer_linux.cc
++++ b/media/webrtc/trunk/webrtc/modules/desktop_capture/screen_capturer_linux.cc
+@@ -26,7 +26,7 @@ std::unique_ptr<DesktopCapturer> DesktopCapturer::CreateRawScreenCapturer(
+     const DesktopCaptureOptions& options) {
+ #if defined(WEBRTC_USE_PIPEWIRE)
+   if (options.allow_pipewire() && DesktopCapturer::IsRunningUnderWayland()) {
+-    return ScreenCapturerPipeWire::CreateRawScreenCapturer(options);
++    return BaseCapturerPipeWire::CreateRawScreenCapturer(options);
+   }
+ #endif  // defined(WEBRTC_USE_PIPEWIRE)
+ 
+diff --git a/media/webrtc/trunk/webrtc/modules/desktop_capture/window_capturer_linux.cc b/media/webrtc/trunk/webrtc/modules/desktop_capture/window_capturer_linux.cc
+index 82359e50c2db..bb9724cf7cc2 100644
+--- a/media/webrtc/trunk/webrtc/modules/desktop_capture/window_capturer_linux.cc
++++ b/media/webrtc/trunk/webrtc/modules/desktop_capture/window_capturer_linux.cc
+@@ -26,7 +26,7 @@ std::unique_ptr<DesktopCapturer> DesktopCapturer::CreateRawWindowCapturer(
+     const DesktopCaptureOptions& options) {
+ #if defined(WEBRTC_USE_PIPEWIRE)
+   if (options.allow_pipewire() && DesktopCapturer::IsRunningUnderWayland()) {
+-    return WindowCapturerPipeWire::CreateRawWindowCapturer(options);
++    return BaseCapturerPipeWire::CreateRawWindowCapturer(options);
+   }
+ #endif  // defined(WEBRTC_USE_PIPEWIRE)
+ 
diff --git a/firefox.spec b/firefox.spec
index 1f7a95e..3964ab5 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -118,7 +118,7 @@ ExcludeArch: s390x
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
 Version:        74.0
-Release:        7%{?nss_tag}%{?dist}
+Release:        8%{?nss_tag}%{?dist}
 URL:            https://www.mozilla.org/firefox/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 Source0:        https://archive.mozilla.org/pub/firefox/releases/%{version}%{?pre_version}/source/firefox-%{version}%{?pre_version}.source.tar.xz
@@ -960,6 +960,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #---------------------------------------------------------------------
 
 %changelog
+* Tue Mar 17 2020 Jan Grulich <jgrulich@redhat.com> - 74-0-8
+- Add support for window sharing
+
 * Mon Mar 16 2020 Martin Stransky <stransky@redhat.com> - 74.0-7
 - Use D-Bus remote exclusively for both X11 and Wayland backends
   when WAYLAND_DISPLAY is present.