video: have a generic context struct for hwdec backends

Before this commit, each hw backend had their own specific struct types
for context, and some, like VDA, had none at all. Add a context struct
(mp_hwdec_ctx) that provides a somewhat generic way to pass the hwdec
context around. Some things get slightly better, some slightly more
verbose.

mp_hwdec_info is still around; it's still needed, but is reduced to its
role of handling delayed loading of the hwdec backend.

1 files changed, 3 insertions, 0 deletions

diff --git a/video/vdpau.h b/video/vdpau.h
index f1c29fd50d..0af00f098b 100644
--- a/video/vdpau.h
+++ b/video/vdpau.h
@@ -10,6 +10,7 @@
 #include <vdpau/vdpau_x11.h>
 
 #include "common/msg.h"
+#include "hwdec.h"
 
 #define CHECK_VDP_ERROR(ctx, message) \
     do { \
@@ -40,6 +41,8 @@ struct mp_vdpau_ctx {
     struct mp_log *log;
     Display *x11;
 
+    struct mp_hwdec_ctx hwctx;
+
     // These are mostly immutable, except on preemption. We don't really care
     // to synchronize the preemption case fully correctly, because it's an
     // extremely obscure corner case, and basically a vdpau API design bug.