Bug 1773282 [Linux] Remove IsDMABufVAAPIEnabled() r=emilio,media-playback-reviewers,alwu

We don't need IsDMABufVAAPIEnabled() as we use gfx::gfxVars::CanUseHardwareVideoDecoding() directly.

Differential Revision: https://phabricator.services.mozilla.com/D149764

dom/media/platforms/ffmpeg/FFmpegLibWrapper.cpp

@@ -12,6 +12,7 @@
 #include "PlatformDecoderModule.h"
 #include "prlink.h"
 #ifdef MOZ_WAYLAND
+#  include "mozilla/gfx/gfxVars.h"
 #  include "mozilla/widget/DMABufLibWrapper.h"
 #endif
 
@@ -284,7 +285,7 @@ void FFmpegLibWrapper::Unlink() {
 
 #ifdef MOZ_WAYLAND
 void FFmpegLibWrapper::LinkVAAPILibs() {
-  if (!widget::GetDMABufDevice()->IsDMABufVAAPIEnabled()) {
+  if (!gfx::gfxVars::CanUseHardwareVideoDecoding() || !XRE_IsRDDProcess()) {
     return;
   }
 

dom/media/platforms/ffmpeg/FFmpegVideoDecoder.cpp

@@ -368,10 +368,9 @@ void FFmpegVideoDecoder<LIBAV_VER>::InitHWDecodingPrefs() {
     FFMPEG_LOG("Hardware WebRender is off, VAAPI is disabled");
     return;
   }
-
-  if (!widget::GetDMABufDevice()->IsDMABufVAAPIEnabled()) {
+  if (!XRE_IsRDDProcess()) {
     mEnableHardwareDecoding = false;
-    FFMPEG_LOG("VA-API is disabled by preference.");
+    FFMPEG_LOG("VA-API works in RDD process only");
   }
 }
 #endif

widget/gtk/DMABufLibWrapper.cpp

@@ -269,16 +269,6 @@ bool nsDMABufDevice::IsDMABufTexturesEnabled() {
 #else
 bool nsDMABufDevice::IsDMABufTexturesEnabled() { return false; }
 #endif
-bool nsDMABufDevice::IsDMABufVAAPIEnabled() {
-  LOGDMABUF(
-      ("nsDMABufDevice::IsDMABufVAAPIEnabled: EGL %d "
-       "media_ffmpeg_vaapi_enabled %d CanUseHardwareVideoDecoding %d "
-       "XRE_IsRDDProcess %d\n",
-       gfx::gfxVars::UseEGL(), StaticPrefs::media_ffmpeg_vaapi_enabled(),
-       gfx::gfxVars::CanUseHardwareVideoDecoding(), XRE_IsRDDProcess()));
-  return gfx::gfxVars::UseVAAPI() && XRE_IsRDDProcess() &&
-         gfx::gfxVars::CanUseHardwareVideoDecoding();
-}
 bool nsDMABufDevice::IsDMABufWebGLEnabled() {
   LOGDMABUF(
       ("nsDMABufDevice::IsDMABufWebGLEnabled: UseDMABuf %d "

widget/gtk/DMABufLibWrapper.h

@@ -190,8 +190,6 @@ class nsDMABufDevice {
 
   // Use dmabuf for WebRender general web content
   bool IsDMABufTexturesEnabled();
-  // Use dmabuf for VA-API video playback
-  bool IsDMABufVAAPIEnabled();
   // Use dmabuf for WebGL content
   bool IsDMABufWebGLEnabled();
   void DisableDMABufWebGL();