Add Metal renderer for Mac and iOS (#3841)

aconfigure

@@ -712,6 +712,7 @@ ac_pjmedia_video_has_qt
 ac_darwin_cflags
 ac_pjmedia_video_has_ios_opengl
 ac_pjmedia_video_has_vtoolbox
+ac_pjmedia_video_has_metal
 ac_pjmedia_video_has_darwin
 ac_dshow_ldflags
 ac_dshow_cflags
@@ -7469,6 +7470,7 @@ printf "%s\n" "Checking if OpenGL ES 2 is available... no" >&6; }
 
 
 
+
 	SAVED_LIBS="$LIBS"
 	LIBS="-framework AVFoundation -framework CoreGraphics -framework QuartzCore -framework CoreVideo -framework CoreMedia"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -7508,6 +7510,26 @@ then :
 else $as_nop
   ac_pjmedia_video_has_vtoolbox=no
 fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+	LIBS="-framework Metal"
+	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main (void)
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_pjmedia_video_has_metal=yes
+else $as_nop
+  ac_pjmedia_video_has_metal=no
+fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 	LIBS="-framework OpenGLES"
@@ -7539,6 +7561,15 @@ printf "%s\n" "Checking if AVFoundation framework is available... yes" >&6; }
 	else
 	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: Checking if AVFoundation framework is available... no" >&5
 printf "%s\n" "Checking if AVFoundation framework is available... no" >&6; }
+	fi
+	if test "$ac_pjmedia_video_has_metal" = "yes"; then
+	  ac_darwin_cflags+=" -DPJMEDIA_VIDEO_DEV_HAS_METAL=1"
+	  LIBS="$LIBS -framework Metal -framework MetalKit"
+	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: Checking if Metal framework is available... yes" >&5
+printf "%s\n" "Checking if Metal framework is available... yes" >&6; }
+	else
+	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: Checking if Metal framework is available... no" >&5
+printf "%s\n" "Checking if Metal framework is available... no" >&6; }
 	fi
 	if test "$ac_pjmedia_video_has_vtoolbox" = "yes"; then
 	  #ac_darwin_cflags+=" -DPJMEDIA_HAS_VID_TOOLBOX_CODEC=1"

aconfigure.ac

@@ -1047,6 +1047,7 @@ else
   *darwin*)
 	ac_pjmedia_video=darwin_os
 	AC_SUBST(ac_pjmedia_video_has_darwin)
+	AC_SUBST(ac_pjmedia_video_has_metal)
 	AC_SUBST(ac_pjmedia_video_has_vtoolbox)
 	AC_SUBST(ac_pjmedia_video_has_ios_opengl)
 	AC_SUBST(ac_darwin_cflags)
@@ -1059,6 +1060,10 @@ else
 	AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [])],
 		       [ac_pjmedia_video_has_vtoolbox=yes],
 		       [ac_pjmedia_video_has_vtoolbox=no])
+	LIBS="-framework Metal"
+	AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [])],
+		       [ac_pjmedia_video_has_metal=yes],
+		       [ac_pjmedia_video_has_metal=no])
 	LIBS="-framework OpenGLES"
 	AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [])],
 		       [ac_pjmedia_video_has_ios_opengl=yes],
@@ -1071,6 +1076,13 @@ else
 	else
 	  AC_MSG_RESULT([Checking if AVFoundation framework is available... no])
 	fi
+	if test "$ac_pjmedia_video_has_metal" = "yes"; then
+	  ac_darwin_cflags+=" -DPJMEDIA_VIDEO_DEV_HAS_METAL=1"
+	  LIBS="$LIBS -framework Metal -framework MetalKit"
+	  AC_MSG_RESULT([Checking if Metal framework is available... yes])
+	else
+	  AC_MSG_RESULT([Checking if Metal framework is available... no])
+	fi
 	if test "$ac_pjmedia_video_has_vtoolbox" = "yes"; then
 	  #ac_darwin_cflags+=" -DPJMEDIA_HAS_VID_TOOLBOX_CODEC=1"
 	  LIBS="$LIBS -framework VideoToolbox"

build.mak.in

@@ -204,6 +204,7 @@ AC_PJMEDIA_VIDEO_HAS_QT = @ac_pjmedia_video_has_qt@
 
 # Darwin (Mac and iOS)
 AC_PJMEDIA_VIDEO_HAS_DARWIN = @ac_pjmedia_video_has_darwin@
+AC_PJMEDIA_VIDEO_HAS_METAL = @ac_pjmedia_video_has_metal@
 AC_PJMEDIA_VIDEO_HAS_VTOOLBOX = @ac_pjmedia_video_has_vtoolbox@
 AC_PJMEDIA_VIDEO_HAS_IOS_OPENGL = @ac_pjmedia_video_has_ios_opengl@
 DARWIN_CFLAGS = @ac_darwin_cflags@

pjmedia/build/os-auto.mak.in

@@ -300,6 +300,13 @@ ifeq ($(AC_PJMEDIA_VIDEO_HAS_DARWIN),yes)
 export PJMEDIA_VIDEODEV_OBJS += darwin_dev.o
 endif
 
+#
+# Metal video device
+#
+ifeq ($(AC_PJMEDIA_VIDEO_HAS_METAL),yes)
+export PJMEDIA_VIDEODEV_OBJS += metal_dev.o
+endif
+
 #
 # VideoToolbox codec
 #

pjmedia/include/pjmedia/videodev.h

@@ -58,6 +58,11 @@ typedef enum pjmedia_vid_dev_hwnd_type
      */
     PJMEDIA_VID_DEV_HWND_TYPE_WINDOWS,
 
+    /**
+     * Native view on Cocoa Mac.
+     */
+    PJMEDIA_VID_DEV_HWND_TYPE_COCOA,
+
     /**
      * Native view on iOS.
      */