vd_lavc, vdpau, vaapi: restore emulated API avoidance

This code is for trying to avoid using an emulation layer when using
auto probing, so that we end up using the actual API the drivers
provide. It was destroyed in the recent refactor.

1 files changed, 11 insertions, 0 deletions

diff --git a/video/decode/vd_lavc.c b/video/decode/vd_lavc.c
index 5e9b30d453..aac9f81839 100644
--- a/video/decode/vd_lavc.c
+++ b/video/decode/vd_lavc.c
@@ -458,6 +458,17 @@ static void select_and_set_hwdec(struct dec_video *vd)
                     MP_VERBOSE(vd, "Could not create device.\n");
                     continue;
                 }
+
+                const struct hwcontext_fns *fns =
+                            hwdec_get_hwcontext_fns(hwdec->lavc_device);
+                if (fns && fns->is_emulated && fns->is_emulated(ctx->hwdec_dev)) {
+                    if (hwdec_auto) {
+                        MP_VERBOSE(vd, "Not using emulated API.\n");
+                        av_buffer_unref(&ctx->hwdec_dev);
+                        continue;
+                    }
+                    MP_WARN(vd, "Using emulated hardware decoding API.\n");
+                }
             }
 
             ctx->use_hwdec = true;