lavu: Add OpenCL hardware pixfmt

doc/APIchanges

@@ -15,6 +15,9 @@ libavutil:     2017-10-21
 
 API changes, most recent first:
 
+2017-11-xx - xxxxxxx - lavu 55.1.0 - pixfmt.h
+  Add AV_PIX_FMT_OPENCL.
+
 2017-xx-xx - xxxxxxx - lavc 58.3.100 - avcodec.h
   Add avcodec_get_hw_frames_parameters().
 

libavutil/pixdesc.c

@@ -2181,6 +2181,10 @@ static const AVPixFmtDescriptor av_pix_fmt_descriptors[AV_PIX_FMT_NB] = {
         .name = "drm_prime",
         .flags = AV_PIX_FMT_FLAG_HWACCEL,
     },
+    [AV_PIX_FMT_OPENCL] = {
+        .name  = "opencl",
+        .flags = AV_PIX_FMT_FLAG_HWACCEL,
+    },
 };
 #if FF_API_PLUS1_MINUS1
 FF_ENABLE_DEPRECATION_WARNINGS

libavutil/pixfmt.h

@@ -322,6 +322,13 @@ enum AVPixelFormat {
      * data[0] points to an AVDRMFrameDescriptor.
      */
     AV_PIX_FMT_DRM_PRIME,
+    /**
+     * Hardware surfaces for OpenCL.
+     *
+     * data[i] contain 2D image objects (typed in C as cl_mem, used
+     * in OpenCL as image2d_t) for each plane of the surface.
+     */
+    AV_PIX_FMT_OPENCL,
 
     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
 };

libavutil/version.h

@@ -80,7 +80,7 @@
 
 
 #define LIBAVUTIL_VERSION_MAJOR  56
-#define LIBAVUTIL_VERSION_MINOR   0
+#define LIBAVUTIL_VERSION_MINOR   1
 #define LIBAVUTIL_VERSION_MICRO 100
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \