[FFmpeg-trac] #3958(avcodec:new): libvpx symbol check missing in configure, build-time error

[FFmpeg]

#3958: libvpx symbol check missing in configure, build-time error
-------------------------------------+-------------------------------------
               Reporter:  saste      |                  Owner:
                   Type:  defect     |                 Status:  new
               Priority:  important  |              Component:  avcodec
                Version:  git-       |               Keywords:  libvpx
  master                             |  configure regression
             Blocked By:             |               Blocking:
Reproduced by developer:  1          |  Analyzed by developer:  1
-------------------------------------+-------------------------------------
 I'm compiling FFmpeg with {{{--enable-libvpx}}} on Linux Mint, with libvpx
 version 1.2.0-2. Configuration succeds, but since commit
 {{{
 commit 04b0dda853198980a14158809e560ea9ca9d7e33
 Author: Deb Mukherjee <debargha at google.com>
 Date:   Sun Sep 14 07:43:27 2014 -0700

     avcodec/libvpxdec: Adds decode support for formats other than 420

     Handles decoding of new VP9 profiles 1-3 with different color sampling
     and bit-depths.

     For high bitdepth (profiles 2 and 3) support, we currently need to
 link
     with the highbitdepth branch of libvpx with --enable-experimental
     and --enable-vp9-high config options on. But eventually this branch
 will
     be merged into master, whereafter to enable high bitdepth
     support you will need to link with libvpx with configure option
     --enable-vp9-highbitdepth on.

     Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
 }}}

 I got the following building time failure:
 {{{
 CC      libavcodec/libvpxdec.o
 libavcodec/libvpxdec.c: In function ‘set_pix_fmt’:
 libavcodec/libvpxdec.c:71:14: error: ‘VPX_IMG_FMT_I422’ undeclared (first
 use in this function)
          case VPX_IMG_FMT_I422:
               ^
 libavcodec/libvpxdec.c:71:14: note: each undeclared identifier is reported
 only once for each function it appears in
 libavcodec/libvpxdec.c:74:14: error: ‘VPX_IMG_FMT_I444’ undeclared (first
 use in this function)
          case VPX_IMG_FMT_I444:
               ^
 make: *** [libavcodec/libvpxdec.o] Error 1
 }}}

 This seems due to the reference to newly added symbols which are not
 included in my libvpx version. Adding a check in the FFmpeg configure
 script (ideally relying on some version check against the libvpx headers)
 should allow to fix the build failure.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/3958>
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