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, 2 deletions

diff --git a/video/out/vo_opengl_cb.c b/video/out/vo_opengl_cb.c
index 3d5c16d8f2..1a2e44f718 100644
--- a/video/out/vo_opengl_cb.c
+++ b/video/out/vo_opengl_cb.c
@@ -227,9 +227,10 @@ int mpv_opengl_cb_init_gl(struct mpv_opengl_cb_context *ctx, const char *exts,
     if (!ctx->renderer)
         return MPV_ERROR_UNSUPPORTED;
 
-    ctx->hwdec = gl_hwdec_load_api(ctx->log, ctx->gl, ctx->hwapi, &ctx->hwdec_info);
+    ctx->hwdec = gl_hwdec_load_api(ctx->log, ctx->gl, ctx->hwapi);
     gl_video_set_hwdec(ctx->renderer, ctx->hwdec);
-
+    if (ctx->hwdec)
+        ctx->hwdec_info.hwctx = ctx->hwdec->hwctx;
 
     pthread_mutex_lock(&ctx->lock);
     ctx->eq = *gl_video_eq_ptr(ctx->renderer);