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, 2 insertions, 4 deletions

diff --git a/video/out/gl_hwdec_vdpau.c b/video/out/gl_hwdec_vdpau.c
index c59d97bc1b..49f8e7c7b5 100644
--- a/video/out/gl_hwdec_vdpau.c
+++ b/video/out/gl_hwdec_vdpau.c
@@ -87,14 +87,12 @@ static void destroy(struct gl_hwdec *hw)
     destroy_objects(hw);
     mp_vdpau_mixer_destroy(p->mixer);
     mp_vdpau_destroy(p->ctx);
-
-    hw->info->vdpau_ctx = NULL;
 }
 
 static int create(struct gl_hwdec *hw)
 {
     GL *gl = hw->gl;
-    if (hw->info->vdpau_ctx)
+    if (hw->hwctx)
         return -1;
     Display *x11disp = glXGetCurrentDisplay();
     if (!x11disp)
@@ -115,7 +113,7 @@ static int create(struct gl_hwdec *hw)
         destroy(hw);
         return -1;
     }
-    hw->info->vdpau_ctx = p->ctx;
+    hw->hwctx = &p->ctx->hwctx;
     hw->converted_imgfmt = IMGFMT_RGB0;
     return 0;
 }