command: add property returning detected hwdec API

This is somewhat imperfect, because detection of hw decoding APIs is
mostly done on demand, and often avoided if not necessary. (For example,
we know very well that there are no hw decoders for certain codecs.)

This also requires every hwdec backend to identify itself (see hwdec.h
changes).

1 files changed, 13 insertions, 0 deletions

diff --git a/video/hwdec.h b/video/hwdec.h
index a7d2cf8c4b..0574e5c562 100644
--- a/video/hwdec.h
+++ b/video/hwdec.h
@@ -3,7 +3,20 @@
 
 struct mp_image_pool;
 
+// keep in sync with --hwdec option
+enum hwdec_type {
+    HWDEC_AUTO = -1,
+    HWDEC_NONE = 0,
+    HWDEC_VDPAU = 1,
+    HWDEC_VDA = 2,
+    HWDEC_VAAPI = 4,
+    HWDEC_VAAPI_COPY = 5,
+    HWDEC_DXVA2_COPY = 6,
+};
+
 struct mp_hwdec_ctx {
+    enum hwdec_type type;
+
     void *priv; // for free use by hwdec implementation
 
     // API-specific, not needed by all backends.