video_filter: group RGB+x and RGB+a switch cases

As it's done for some other common chromas.

modules/video_filter/filter_picture.h

@@ -56,6 +56,22 @@
         case VLC_CODEC_YUYV:   \
         case VLC_CODEC_YVYU:
 
+#define CASE_PACKED_RGBX                    \
+        case VLC_CODEC_RGBX:   \
+        case VLC_CODEC_XRGB:   \
+        case VLC_CODEC_BGRX:   \
+        case VLC_CODEC_XBGR:
+
+#define CASE_PACKED_RGBA                    \
+        case VLC_CODEC_RGBA:   \
+        case VLC_CODEC_ARGB:   \
+        case VLC_CODEC_BGRA:   \
+        case VLC_CODEC_ABGR:
+
+#define CASE_PACKED_RGB32                   \
+        CASE_PACKED_RGBX       \
+        CASE_PACKED_RGBA
+
 static inline int GetPackedYuvOffsets( vlc_fourcc_t i_chroma,
     int *i_y_offset, int *i_u_offset, int *i_v_offset )
 {

modules/video_filter/mirror.c

@@ -120,16 +120,10 @@ static int Create( filter_t *p_filter )
             break;
         CASE_PACKED_YUV_422
             break;
+        CASE_PACKED_RGB32
+            break;
         case VLC_CODEC_RGB24:
         case VLC_CODEC_BGR24:
-        case VLC_CODEC_RGBA:
-        case VLC_CODEC_ARGB:
-        case VLC_CODEC_BGRA:
-        case VLC_CODEC_ABGR:
-        case VLC_CODEC_RGBX:
-        case VLC_CODEC_XRGB:
-        case VLC_CODEC_BGRX:
-        case VLC_CODEC_XBGR:
             break;
 
         default:
@@ -229,14 +223,7 @@ static void VerticalMirror( picture_t *p_pic, picture_t *p_outpic, int i_plane,
         case VLC_CODEC_BGR24:
             RV24VerticalMirror( p_pic, p_outpic, i_plane, b_left_to_right );
             break;
-        case VLC_CODEC_RGBA:
-        case VLC_CODEC_ARGB:
-        case VLC_CODEC_BGRA:
-        case VLC_CODEC_ABGR:
-        case VLC_CODEC_RGBX:
-        case VLC_CODEC_XRGB:
-        case VLC_CODEC_BGRX:
-        case VLC_CODEC_XBGR:
+        CASE_PACKED_RGB32
             RV32VerticalMirror( p_pic, p_outpic, i_plane, b_left_to_right );
             break;
         default:

modules/video_filter/posterize.c

@@ -105,14 +105,7 @@ static int Create( filter_t *p_filter )
         case VLC_CODEC_RGB24:
         case VLC_CODEC_BGR24:
             break;
-        case VLC_CODEC_RGBA:
-        case VLC_CODEC_ARGB:
-        case VLC_CODEC_BGRA:
-        case VLC_CODEC_ABGR:
-        case VLC_CODEC_RGBX:
-        case VLC_CODEC_XRGB:
-        case VLC_CODEC_BGRX:
-        case VLC_CODEC_XBGR:
+        CASE_PACKED_RGB32
             break;
         default:
             msg_Err( p_filter, "Unsupported input chroma (%4.4s)",
@@ -175,14 +168,7 @@ static void Filter( filter_t *p_filter, picture_t *p_pic, picture_t *p_outpic )
         case VLC_CODEC_BGR24:
             RVPosterize( p_pic, p_outpic, false, level );
             break;
-        case VLC_CODEC_RGBA:
-        case VLC_CODEC_ARGB:
-        case VLC_CODEC_BGRA:
-        case VLC_CODEC_ABGR:
-        case VLC_CODEC_RGBX:
-        case VLC_CODEC_XRGB:
-        case VLC_CODEC_BGRX:
-        case VLC_CODEC_XBGR:
+        CASE_PACKED_RGB32
             RVPosterize( p_pic, p_outpic, true, level );
             break;
         CASE_PLANAR_YUV_SQUARE