audio: add AVChannelLayout helpers to convert from/to mp_chmap

This is the new FFmpeg channel layout structure, which now
combines channel count and layout into a single location.

Only unspecified (channel count only) and native (channel layout
mask based) layouts are currently supported for the initial move
towards non-deprecated APIs.

1 files changed, 4 insertions, 0 deletions

diff --git a/wscript b/wscript
index c7685b0879..63069a2248 100644
--- a/wscript
+++ b/wscript
@@ -412,6 +412,10 @@ libav_dependencies = [
         'fmsg': "Unable to find development files for some of the required \
 FFmpeg libraries. Git master is recommended."
     }, {
+        'name': 'av-channel-layout',
+        'desc': 'FFmpeg AVChannelLayout API',
+        'func': check_pkg_config('libavutil', '>= 57.24.100'),
+    }, {
         'name': '--libavdevice',
         'desc': 'libavdevice',
         'func': check_pkg_config('libavdevice', '>= 57.0.0'),