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, 12 insertions, 2 deletions

diff --git a/video/vaapi.c b/video/vaapi.c
index a6607b4aeb..00052cec39 100644
--- a/video/vaapi.c
+++ b/video/vaapi.c
@@ -204,12 +204,21 @@ VASurfaceID va_surface_id(struct mp_image *mpi)
         (VASurfaceID)(uintptr_t)mpi->planes[3] : VA_INVALID_ID;
 }
 
-bool va_guess_if_emulated(struct mp_vaapi_ctx *ctx)
+static bool is_emulated(struct AVBufferRef *hw_device_ctx)
 {
-    const char *s = vaQueryVendorString(ctx->display);
+    AVHWDeviceContext *hwctx = (void *)hw_device_ctx->data;
+    AVVAAPIDeviceContext *vactx = hwctx->hwctx;
+
+    const char *s = vaQueryVendorString(vactx->display);
     return s && strstr(s, "VDPAU backend");
 }
 
+
+bool va_guess_if_emulated(struct mp_vaapi_ctx *ctx)
+{
+    return is_emulated(ctx->av_device_ref);
+}
+
 struct va_native_display {
     void (*create)(VADisplay **out_display, void **out_native_ctx);
     void (*destroy)(void *native_ctx);
@@ -327,4 +336,5 @@ static struct AVBufferRef *va_create_standalone(struct mpv_global *global,
 const struct hwcontext_fns hwcontext_fns_vaapi = {
     .av_hwdevice_type = AV_HWDEVICE_TYPE_VAAPI,
     .create_dev = va_create_standalone,
+    .is_emulated = is_emulated,
 };