Merge commit 'd78fd2fa'

* commit 'd78fd2fa':
  Add MagicYUV decoder

Changes observed from Libav:
- many cosmetics (function renames/move, spacing, line breaks)
- MagicYUVContext.slices_size is now unsigned
- use of pixdesc (include fixed in FFmpeg)
- mention of "Lossless" in the long name dropped (also removed from
  general.texi in FFmpeg)
- addition of the FF_CODEC_CAP_INIT_THREADSAFE caps
- use of qsort() instead of AV_QSORT() (NOT MERGED)
- use of AVCodecContext.{width,height} instead of AVCodecContext.coded_{width,height} (NOT MERGED)

See also 77f9c4b7Merged-by: Clément Bœsch <u@pkh.me>

doc/general.texi

@@ -745,7 +745,7 @@ following image formats are supported:
 @item LucasArts SANM/Smush   @tab     @tab  X
     @tab Used in LucasArts games / SMUSH animations.
 @item lossless MJPEG         @tab  X  @tab  X
-@item MagicYUV Lossless Video @tab     @tab  X
+@item MagicYUV Video         @tab     @tab  X
 @item Microsoft ATC Screen   @tab     @tab  X
     @tab Also known as Microsoft Screen 3.
 @item Microsoft Expression Encoder Screen  @tab     @tab  X

libavcodec/codec_desc.c

@@ -1546,7 +1546,7 @@ static const AVCodecDescriptor codec_descriptors[] = {
         .id        = AV_CODEC_ID_MAGICYUV,
         .type      = AVMEDIA_TYPE_VIDEO,
         .name      = "magicyuv",
-        .long_name = NULL_IF_CONFIG_SMALL("MagicYUV Lossless Video"),
+        .long_name = NULL_IF_CONFIG_SMALL("MagicYUV video"),
         .props     = AV_CODEC_PROP_INTRA_ONLY | AV_CODEC_PROP_LOSSLESS,
     },
     {