core: add RGBA 64 bits

16 bits per channel. Equivalent to DXGI_FORMAT_R16G16B16A16_UNORM.

(cherry picked from commit 9155641b72)

include/vlc_fourcc.h

@@ -330,6 +330,8 @@
 #define VLC_CODEC_ARGB            VLC_FOURCC('A','R','G','B')
 /* 32 bits BGRA */
 #define VLC_CODEC_BGRA            VLC_FOURCC('B','G','R','A')
+/* 64 bits RGBA */
+#define VLC_CODEC_RGBA64          VLC_FOURCC('R','G','A','4')
 
 /* Planar GBR 4:4:4 8 bits */
 #define VLC_CODEC_GBR_PLANAR      VLC_FOURCC('G','B','R','8')

src/misc/fourcc.c

@@ -744,6 +744,7 @@ static const struct
     { { VLC_CODEC_RGB32, 0 },                  PACKED_FMT(4, 24) },
     { { VLC_CODEC_RGBA, VLC_CODEC_ARGB,
         VLC_CODEC_BGRA, },                     PACKED_FMT(4, 32) },
+    { { VLC_CODEC_RGBA64, 0 },                 PACKED_FMT(8, 64) },
     { { VLC_CODEC_VUYA, 0 },                   PACKED_FMT(4, 32) },
 
     { { VLC_CODEC_Y211, 0 },                   { 1, { {{1,4}, {1,1}} }, 4, 32 } },

src/misc/fourcc_list.h

@@ -800,6 +800,8 @@ static const staticentry_t p_list_video[] = {
         A("AV32"),
     B(VLC_CODEC_BGRA, "32 bits BGRA"),
         A("BGRA"),
+    B(VLC_CODEC_RGBA64, "64 bits RGBA"),
+        A("RGA4"),
 
     B(VLC_CODEC_GREY, "8 bits greyscale"),
         A("GREY"),