[PATCH 1/2] configure: Detect libdav1d and enable the lavc libdav1d decoder

The codecs.conf entry was already added in SVN r38155 .

This change allows to autodetect/enable the libdav1d decoder for
internal FFmpeg.

Signed-off-by: Alexander Strasser <[email protected]>
---
 configure | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/configure b/configure
index 41c054686..bd24b0649 100755
--- a/configure
+++ b/configure
@@ -412,6 +412,7 @@ Codecs:
   --disable-x264            disable x264 [autodetect]
   --disable-x264-lavc       disable x264 in libavcodec [autodetect]
   --disable-libvpx-lavc     disable libvpx in libavcodec [autodetect]
+  --disable-libdav1d-lavc   disable libdav1d in libavcodec [autodetect]
   --disable-libnut          disable libnut [autodetect]
   --disable-ffmpeg_a        disable static FFmpeg [autodetect]
   --disable-ffmpeg_so       disable shared FFmpeg [autodetect]
@@ -806,6 +807,7 @@ _xvid_lavc=auto
 _x264=auto
 _x264_lavc=auto
 _libvpx_lavc=auto
+_libdav1d_lavc=auto
 _libnut=auto
 _lirc=auto
 _lircc=auto
@@ -7493,6 +7495,36 @@ else
 fi
 echores "$_libvpx_lavc"

+
+echocheck "libdav1d"
+if test "$_libdav1d_lavc" = auto; then
+  _libdav1d_lavc=no
+  if test "$ffmpeg_a" != yes; then
+    res_comment="dynamic linking to libdav1d is irrelevant when using dynamic FFmpeg"
+  else
+    cat > $TMPC << EOF
+#include <dav1d/dav1d.h>
+int main(void) {
+    const char *version_lib = dav1d_version();
+    return version_lib[0];
+}
+EOF
+    for ld_tmp in "-ldav1d" "-ldav1d $ld_pthread" ; do
+      cc_check $ld_tmp && _libdav1d_lavc=yes && extra_ldflags="$extra_ldflags $ld_tmp" && break
+    done
+  fi
+fi
+if test "$_libdav1d_lavc" = yes ; then
+  def_libdav1d_lavc='#define CONFIG_LIBDAV1D 1'
+  libavdecoders="$libavdecoders LIBDAV1D_DECODER"
+  codecmodules="libdav1d $codecmodules"
+else
+  def_libdav1d_lavc='#define CONFIG_LIBDAV1D 0'
+  nocodecmodules="libdav1d $nocodecmodules"
+fi
+echores "$_libdav1d_lavc"
+
+
 echocheck "libnut"
 if test "$_libnut" = auto ; then
   _libnut=no
@@ -9238,6 +9270,7 @@ $def_emmintrin_h
 /* external libraries */
 $def_bzlib
 $def_crystalhd
+$def_libdav1d_lavc
 $def_libgsm
 $def_libopencore_amrnb
 $def_libopencore_amrwb
--
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