pixfmt: add P010 pixel format

P010 is the 10-bit variant of NV12 (planar luma, packed chroma), using two
bytes per component to store 10-bit data plus 6-bit zeroes in the LSBs.

Signed-off-by: Anton Khirnov <anton@khirnov.net>

doc/APIchanges

@@ -13,6 +13,9 @@ libavutil:     2015-08-28
 
 API changes, most recent first:
 
+2016-xx-xx - xxxxxxx - lavu 55.18.0 - pixdesc.h
+  Add AV_PIX_FMT_P010(LE/BE).
+
 2016-xx-xx - xxxxxxx - lavc 57.24.0 - avcodec.h
   Decoders now export the frame timestamp as AVFrame.pts. It was
   previously exported as AVFrame.pkt_pts, which is now deprecated.

libavutil/pixdesc.c

@@ -1590,6 +1590,30 @@ static const AVPixFmtDescriptor av_pix_fmt_descriptors[AV_PIX_FMT_NB] = {
         .name = "cuda",
         .flags = AV_PIX_FMT_FLAG_HWACCEL,
     },
+    [AV_PIX_FMT_P010LE] = {
+        .name = "p010le",
+        .nb_components = 3,
+        .log2_chroma_w = 1,
+        .log2_chroma_h = 1,
+        .comp = {
+            { 0, 2, 0, 6, 10, 1, 9, 1 },        /* Y */
+            { 1, 4, 0, 6, 10, 3, 9, 1 },        /* U */
+            { 1, 4, 2, 6, 10, 3, 9, 3 },        /* V */
+        },
+        .flags = AV_PIX_FMT_FLAG_PLANAR,
+    },
+    [AV_PIX_FMT_P010BE] = {
+        .name = "p010be",
+        .nb_components = 3,
+        .log2_chroma_w = 1,
+        .log2_chroma_h = 1,
+        .comp = {
+            { 0, 2, 0, 6, 10, 1, 9, 1 },        /* Y */
+            { 1, 4, 0, 6, 10, 3, 9, 1 },        /* U */
+            { 1, 4, 2, 6, 10, 3, 9, 3 },        /* V */
+        },
+        .flags = AV_PIX_FMT_FLAG_PLANAR | AV_PIX_FMT_FLAG_BE,
+    },
 };
 #if FF_API_PLUS1_MINUS1
 FF_ENABLE_DEPRECATION_WARNINGS

libavutil/pixfmt.h

@@ -227,6 +227,9 @@ enum AVPixelFormat {
      */
     AV_PIX_FMT_CUDA,
 
+    AV_PIX_FMT_P010LE, ///< like NV12, with 10bpp per component, data in the high bits, zeros in the low bits, little-endian
+    AV_PIX_FMT_P010BE, ///< like NV12, with 10bpp per component, data in the high bits, zeros in the low bits, 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
 };
 
@@ -282,6 +285,7 @@ enum AVPixelFormat {
 
 #define AV_PIX_FMT_XYZ12      AV_PIX_FMT_NE(XYZ12BE, XYZ12LE)
 #define AV_PIX_FMT_NV20       AV_PIX_FMT_NE(NV20BE,  NV20LE)
+#define AV_PIX_FMT_P010       AV_PIX_FMT_NE(P010BE,  P010LE)
 
 /**
   * Chromaticity coordinates of the source primaries.

libavutil/version.h

@@ -54,7 +54,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR 55
-#define LIBAVUTIL_VERSION_MINOR 17
+#define LIBAVUTIL_VERSION_MINOR 18
 #define LIBAVUTIL_VERSION_MICRO  0
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \