avutil: add P016 pixel format

P016 is the 16-bit variant of NV12 (planar luma, packed chroma), using
two bytes per component.

It may, and in fact is most likely to, be used in situations where
there are less than 16 bits of data. It is the responsibility of
the writer to zero out any unused LSBs.

libavutil/pixdesc.c

@@ -2078,6 +2078,30 @@ static const AVPixFmtDescriptor av_pix_fmt_descriptors[AV_PIX_FMT_NB] = {
         },
         .flags = AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_BE,
     },
+    [AV_PIX_FMT_P016LE] = {
+        .name = "p016le",
+        .nb_components = 3,
+        .log2_chroma_w = 1,
+        .log2_chroma_h = 1,
+        .comp = {
+            { 0, 2, 0, 0, 16, 1, 15, 1 },       /* Y */
+            { 1, 4, 0, 0, 16, 3, 15, 1 },       /* U */
+            { 1, 4, 2, 0, 16, 3, 15, 3 },       /* V */
+        },
+        .flags = AV_PIX_FMT_FLAG_PLANAR,
+    },
+    [AV_PIX_FMT_P016BE] = {
+        .name = "p016be",
+        .nb_components = 3,
+        .log2_chroma_w = 1,
+        .log2_chroma_h = 1,
+        .comp = {
+            { 0, 2, 0, 0, 16, 1, 15, 1 },       /* Y */
+            { 1, 4, 0, 0, 16, 3, 15, 1 },       /* U */
+            { 1, 4, 2, 0, 16, 3, 15, 3 },       /* V */
+        },
+        .flags = AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_BE,
+    },
     [AV_PIX_FMT_GBRAP12LE] = {
         .name = "gbrap12le",
         .nb_components = 4,

libavutil/pixfmt.h

@@ -311,6 +311,9 @@ enum AVPixelFormat {
     AV_PIX_FMT_GRAY10BE,   ///<        Y        , 10bpp, big-endian
     AV_PIX_FMT_GRAY10LE,   ///<        Y        , 10bpp, little-endian
 
+    AV_PIX_FMT_P016LE, ///< like NV12, with 16bpp per component, little-endian
+    AV_PIX_FMT_P016BE, ///< like NV12, with 16bpp per component, big-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
 };
 
@@ -389,6 +392,7 @@ enum AVPixelFormat {
 #define AV_PIX_FMT_NV20       AV_PIX_FMT_NE(NV20BE,  NV20LE)
 #define AV_PIX_FMT_AYUV64     AV_PIX_FMT_NE(AYUV64BE, AYUV64LE)
 #define AV_PIX_FMT_P010       AV_PIX_FMT_NE(P010BE,  P010LE)
+#define AV_PIX_FMT_P016       AV_PIX_FMT_NE(P016BE,  P016LE)
 
 /**
   * Chromaticity coordinates of the source primaries.

libavutil/version.h

@@ -79,8 +79,8 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  55
-#define LIBAVUTIL_VERSION_MINOR  40
-#define LIBAVUTIL_VERSION_MICRO 101
+#define LIBAVUTIL_VERSION_MINOR  41
+#define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
                                                LIBAVUTIL_VERSION_MINOR, \