From baa354c64c19ea159fe6574263024c41108c4967 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Thu, 5 Mar 2015 17:10:00 +0100
Subject: build: check whether hwaccels are enabled in FFmpeg

FFmpeg can be compiled with them disabled, and then it won't provide the
public headers specific to these APIs, causing mpv compilation failure.
---
 wscript | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/wscript b/wscript
index 0ec9888790..fd37e4bbe7 100644
--- a/wscript
+++ b/wscript
@@ -665,7 +665,7 @@ hwaccel_features = [
         'name': '--vaapi-hwaccel',
         'desc': 'libavcodec VAAPI hwaccel',
         'deps': [ 'vaapi' ],
-        'func': check_true,
+        'func': check_statement('libavcodec/vaapi.h', '', use='libav'),
     } , {
         'name': '--vda-hwaccel',
         'desc': 'libavcodec VDA hwaccel',
@@ -684,12 +684,14 @@ hwaccel_features = [
         'name': '--vdpau-hwaccel',
         'desc': 'libavcodec VDPAU hwaccel',
         'deps': [ 'vdpau' ],
-        'func': check_true,
+        'func': check_statement('libavcodec/vdpau.h',
+                                'av_vdpau_alloc_context()',
+                                use='libav'),
     }, {
         'name': '--dxva2-hwaccel',
         'desc': 'libavcodec DXVA2 hwaccel',
         'deps': [ 'gdi' ],
-        'func': check_true,
+        'func': check_statement('libavcodec/dxva2.h', '', use='libav'),
     }
 ]
 
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