vaapi: support new libavcodec vaapi API

The old API is deprecated, and libavcodec prints a warning at runtime.
The new API is a bit nicer and does many things for you, such as
managing the underlying hwaccel decoder. libavutil also provides code
for managing surfaces (we use their surface pool).

The new code does not contain any code from the original MPlayer VAAPI
patch (that was used as base for some of the vaapi code in mpv). Thus
the new code is LGPL.

The new API actually does not add any visible symbols, so the only way
to detect it is a version check. Of course, the versions overlap
between FFmpeg and Libav, which requires additional care. The new
API did not get merged into FFmpeg yet, so there's no check for
FFmpeg.

1 files changed, 21 insertions, 0 deletions

diff --git a/wscript b/wscript
index 086b84fd28..891f975027 100644
--- a/wscript
+++ b/wscript
@@ -420,6 +420,13 @@ libav_dependencies = [
         'fmsg': "Unable to find development files for some of the required \
 FFmpeg/Libav libraries. You need at least {0}. Aborting.".format(libav_versions_string)
     }, {
+        'name': 'is_ffmpeg',
+        'desc': 'libav* is FFmpeg',
+        # FFmpeg <=> LIBAVUTIL_VERSION_MICRO>=100
+        'func': check_statement('libavutil/version.h',
+                                'int x[LIBAVUTIL_VERSION_MICRO >= 100 ? 1 : -1]',
+                                use='libav')
+    }, {
         'name': '--libswresample',
         'desc': 'libswresample',
         'func': check_pkg_config('libswresample', '>= 2.3.100'),
@@ -834,6 +841,20 @@ hwaccel_features = [
         'deps': [ 'vaapi' ],
         'func': check_headers('libavcodec/vaapi.h', use='libav'),
     }, {
+        'name': '--vaapi-hwaccel-new',
+        'desc': 'libavcodec VAAPI hwaccel (new)',
+        'deps': [ 'vaapi-hwaccel' ],
+        'deps_neg': [ 'is_ffmpeg' ],
+        'func': check_statement('libavcodec/version.h',
+                                'int x[LIBAVCODEC_VERSION_INT >= AV_VERSION_INT(57, 26, 0) ? 1 : -1]',
+                                use='libav'),
+    }, {
+        'name': '--vaapi-hwaccel-old',
+        'desc': 'libavcodec VAAPI hwaccel (old)',
+        'deps': [ 'vaapi-hwaccel' ],
+        'deps_neg': [ 'vaapi-hwaccel-new' ],
+        'func': check_true,
+    }, {
         'name': '--videotoolbox-hwaccel',
         'desc': 'libavcodec videotoolbox hwaccel',
         'func': compose_checks(