Add GBRP12 pixel format support

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>

doc/APIchanges

@@ -13,6 +13,9 @@ libavutil:     2015-08-28
 
 API changes, most recent first:
 
+2016-xx-xx - xxxxxxx - lavu 55.24.0 - pixfmt.h
+  Add AV_PIX_FMT_GBRP12(LE/BE).
+
 2016-xx-xx - xxxxxxx - lavu 55.23.0 - hwcontext_vaapi.h
   Add AV_VAAPI_DRIVER_QUIRK_ATTRIB_MEMTYPE.
 

libavutil/pixdesc.c

@@ -1514,6 +1514,30 @@ static const AVPixFmtDescriptor av_pix_fmt_descriptors[AV_PIX_FMT_NB] = {
         },
         .flags = AV_PIX_FMT_FLAG_BE | AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB,
     },
+    [AV_PIX_FMT_GBRP12LE] = {
+        .name = "gbrp12le",
+        .nb_components = 3,
+        .log2_chroma_w = 0,
+        .log2_chroma_h = 0,
+        .comp = {
+            { 2, 2, 0, 0, 12, 1, 11, 1 },        /* R */
+            { 0, 2, 0, 0, 12, 1, 11, 1 },        /* G */
+            { 1, 2, 0, 0, 12, 1, 11, 1 },        /* B */
+        },
+        .flags = AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB,
+    },
+    [AV_PIX_FMT_GBRP12BE] = {
+        .name = "gbrp12be",
+        .nb_components = 3,
+        .log2_chroma_w = 0,
+        .log2_chroma_h = 0,
+        .comp = {
+            { 2, 2, 0, 0, 12, 1, 11, 1 },        /* R */
+            { 0, 2, 0, 0, 12, 1, 11, 1 },        /* G */
+            { 1, 2, 0, 0, 12, 1, 11, 1 },        /* B */
+        },
+        .flags = AV_PIX_FMT_FLAG_BE | AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_RGB,
+    },
     [AV_PIX_FMT_GBRP16LE] = {
         .name = "gbrp16le",
         .nb_components = 3,
@@ -1923,6 +1947,7 @@ enum AVPixelFormat av_pix_fmt_swap_endianness(enum AVPixelFormat pix_fmt)
 
     PIX_FMT_SWAP_ENDIANNESS(GBRP9);
     PIX_FMT_SWAP_ENDIANNESS(GBRP10);
+    PIX_FMT_SWAP_ENDIANNESS(GBRP12);
     PIX_FMT_SWAP_ENDIANNESS(GBRP16);
     PIX_FMT_SWAP_ENDIANNESS(YUVA420P9);
     PIX_FMT_SWAP_ENDIANNESS(YUVA422P9);

libavutil/pixfmt.h

@@ -239,6 +239,9 @@ enum AVPixelFormat {
     AV_PIX_FMT_YUV444P12BE, ///< planar YUV 4:4:4, 36bpp, (1 Cr & Cb sample per 1x1 Y), big-endian
     AV_PIX_FMT_YUV444P12LE, ///< planar YUV 4:4:4, 36bpp, (1 Cr & Cb sample per 1x1 Y), little-endian
 
+    AV_PIX_FMT_GBRP12BE,  ///< planar GBR 4:4:4 36bpp, big-endian
+    AV_PIX_FMT_GBRP12LE,  ///< planar GBR 4:4:4 36bpp, little-endian
+
     AV_PIX_FMT_NB,        ///< number of pixel formats, DO NOT USE THIS if you want to link with shared libav* because the number of formats might differ between versions
 };
 
@@ -281,6 +284,7 @@ enum AVPixelFormat {
 
 #define AV_PIX_FMT_GBRP9     AV_PIX_FMT_NE(GBRP9BE ,    GBRP9LE)
 #define AV_PIX_FMT_GBRP10    AV_PIX_FMT_NE(GBRP10BE,    GBRP10LE)
+#define AV_PIX_FMT_GBRP12    AV_PIX_FMT_NE(GBRP12BE,    GBRP12LE)
 #define AV_PIX_FMT_GBRP16    AV_PIX_FMT_NE(GBRP16BE,    GBRP16LE)
 
 #define AV_PIX_FMT_GBRAP16   AV_PIX_FMT_NE(GBRAP16BE,   GBRAP16LE)

libavutil/version.h

@@ -54,7 +54,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR 55
-#define LIBAVUTIL_VERSION_MINOR 23
+#define LIBAVUTIL_VERSION_MINOR 24
 #define LIBAVUTIL_VERSION_MICRO  0
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \