video: handle hwdec screenshots differently

Instead of converting the hw surface to an image in the VO, provide a
generic way to convet hw surfaces, and use this in the screenshot code.

It's all relatively straightforward, except vdpau is being terrible. It
needs a huge chunk of new code, because copying back is not simple.

1 files changed, 8 insertions, 2 deletions

diff --git a/video/vdpau.h b/video/vdpau.h
index 0af00f098b..2304ecd0d6 100644
--- a/video/vdpau.h
+++ b/video/vdpau.h
@@ -12,14 +12,17 @@
 #include "common/msg.h"
 #include "hwdec.h"
 
-#define CHECK_VDP_ERROR(ctx, message) \
+#define CHECK_VDP_ERROR_ST(ctx, message, statement) \
     do { \
         if (vdp_st != VDP_STATUS_OK) { \
             MP_ERR(ctx, "%s: %s\n", message, vdp->get_error_string(vdp_st)); \
-            return -1; \
+            statement \
         } \
     } while (0)
 
+#define CHECK_VDP_ERROR(ctx, message) \
+    CHECK_VDP_ERROR_ST(ctx, message, return -1;)
+
 #define CHECK_VDP_WARNING(ctx, message) \
     do { \
         if (vdp_st != VDP_STATUS_OK) \
@@ -71,6 +74,9 @@ struct mp_vdpau_ctx {
         bool in_use;
         int64_t age;
     } video_surfaces[MAX_VIDEO_SURFACES];
+    struct mp_vdpau_mixer *getimg_mixer;
+    VdpOutputSurface getimg_surface;
+    int getimg_w, getimg_h;
 };
 
 struct mp_vdpau_ctx *mp_vdpau_create_device_x11(struct mp_log *log, Display *x11);