zimg: refactor (move around fields)

The intention is to add slice-threading to the wrapper. For that
purpose, move all zimg related state to a new struct mp_zimg_state.
There is now an array of instances of this struct. The intention is to
have one instance for each thread. As of this commit, this is hardcoded
to 1 thread; the following commit extends this.

1 files changed, 2 insertions, 5 deletions

diff --git a/video/zimg.h b/video/zimg.h
index 4c1a25ca7d..01e731cc36 100644
--- a/video/zimg.h
+++ b/video/zimg.h
@@ -40,11 +40,8 @@ struct mp_zimg_context {
 
     // Cached zimg state (if any). Private, do not touch.
     struct m_config_cache *opts_cache;
-    zimg_filter_graph *zimg_graph;
-    void *zimg_tmp;
-    void *zimg_tmp_alloc;
-    struct mp_zimg_repack *zimg_src;
-    struct mp_zimg_repack *zimg_dst;
+    struct mp_zimg_state **states;
+    int num_states;
 };
 
 // Allocate a zimg context. Always succeeds. Returns a talloc pointer (use