1 files changed, 126 insertions, 0 deletions
diff --git a/video/decode/d3d.c b/video/decode/d3d.c
index a9b67eb0a9..6cc5018333 100644
--- a/video/decode/d3d.c
+++ b/video/decode/d3d.c
@@ -159,3 +159,129 @@ const struct hwcontext_fns hwcontext_fns_d3d11 = {
     .refine_hwframes        = d3d11_refine_hwframes,
     .create_dev             = d3d11_create_standalone,
 };
+
+#if HAVE_D3D9_HWACCEL
+
+#define DXVA2API_USE_BITFIELDS
+#include <libavutil/common.h>
+
+#include <libavutil/hwcontext_dxva2.h>
+
+static void d3d9_free_av_device_ref(AVHWDeviceContext *ctx)
+{
+    AVDXVA2DeviceContext *hwctx = ctx->hwctx;
+
+    if (hwctx->devmgr)
+        IDirect3DDeviceManager9_Release(hwctx->devmgr);
+}
+
+AVBufferRef *d3d9_wrap_device_ref(IDirect3DDevice9 *device)
+{
+    HRESULT hr;
+
+    d3d_load_dlls();
+    if (!dxva2_dll)
+        return NULL;
+
+    HRESULT (WINAPI *DXVA2CreateDirect3DDeviceManager9)(UINT *, IDirect3DDeviceManager9 **) =
+        (void *)GetProcAddress(dxva2_dll, "DXVA2CreateDirect3DDeviceManager9");
+    if (!DXVA2CreateDirect3DDeviceManager9)
+        return NULL;
+
+    AVBufferRef *device_ref = av_hwdevice_ctx_alloc(AV_HWDEVICE_TYPE_DXVA2);
+    if (!device_ref)
+        return NULL;
+
+    AVHWDeviceContext *ctx = (void *)device_ref->data;
+    AVDXVA2DeviceContext *hwctx = ctx->hwctx;
+
+    UINT reset_token = 0;
+    hr = DXVA2CreateDirect3DDeviceManager9(&reset_token, &hwctx->devmgr);
+    if (FAILED(hr))
+        goto fail;
+
+    IDirect3DDeviceManager9_ResetDevice(hwctx->devmgr, device, reset_token);
+    if (FAILED(hr))
+        goto fail;
+
+    ctx->free = d3d9_free_av_device_ref;
+
+    if (av_hwdevice_ctx_init(device_ref) < 0)
+        goto fail;
+
+    return device_ref;
+
+fail:
+    d3d9_free_av_device_ref(ctx);
+    av_buffer_unref(&device_ref);
+    return NULL;
+}
+
+static struct AVBufferRef *d3d9_create_standalone(struct mpv_global *global,
+        struct mp_log *plog, struct hwcontext_create_dev_params *params)
+{
+    d3d_load_dlls();
+    if (!d3d9_dll || !dxva2_dll) {
+        mp_err(plog, "Failed to load D3D9 library\n");
+        return NULL;
+    }
+
+    HRESULT (WINAPI *Direct3DCreate9Ex)(UINT, IDirect3D9Ex **) =
+        (void *)GetProcAddress(d3d9_dll, "Direct3DCreate9Ex");
+    if (!Direct3DCreate9Ex) {
+        mp_err(plog, "Failed to locate Direct3DCreate9Ex\n");
+        return NULL;
+    }
+
+    IDirect3D9Ex *d3d9ex = NULL;
+    HRESULT hr = Direct3DCreate9Ex(D3D_SDK_VERSION, &d3d9ex);
+    if (FAILED(hr)) {
+        mp_err(plog, "Failed to create IDirect3D9Ex object\n");
+        return NULL;
+    }
+
+    UINT adapter = D3DADAPTER_DEFAULT;
+    D3DDISPLAYMODEEX modeex = {0};
+    IDirect3D9Ex_GetAdapterDisplayModeEx(d3d9ex, adapter, &modeex, NULL);
+
+    D3DPRESENT_PARAMETERS present_params = {
+        .Windowed         = TRUE,
+        .BackBufferWidth  = 640,
+        .BackBufferHeight = 480,
+        .BackBufferCount  = 0,
+        .BackBufferFormat = modeex.Format,
+        .SwapEffect       = D3DSWAPEFFECT_DISCARD,
+        .Flags            = D3DPRESENTFLAG_VIDEO,
+    };
+
+    IDirect3DDevice9Ex *exdev = NULL;
+    hr = IDirect3D9Ex_CreateDeviceEx(d3d9ex, adapter,
+                                     D3DDEVTYPE_HAL,
+                                     GetShellWindow(),
+                                     D3DCREATE_SOFTWARE_VERTEXPROCESSING |
+                                     D3DCREATE_MULTITHREADED |
+                                     D3DCREATE_FPU_PRESERVE,
+                                     &present_params,
+                                     NULL,
+                                     &exdev);
+    IDirect3D9_Release(d3d9ex);
+    if (FAILED(hr)) {
+        mp_err(plog, "Failed to create Direct3D device: %s\n",
+               mp_HRESULT_to_str(hr));
+        return NULL;
+    }
+
+    AVBufferRef *avref = d3d9_wrap_device_ref((IDirect3DDevice9 *)exdev);
+    IDirect3DDevice9Ex_Release(exdev);
+    if (!avref)
+        mp_err(plog, "Failed to allocate AVHWDeviceContext.\n");
+
+    return avref;
+}
+
+const struct hwcontext_fns hwcontext_fns_dxva2 = {
+    .av_hwdevice_type       = AV_HWDEVICE_TYPE_DXVA2,
+    .create_dev             = d3d9_create_standalone,
+};
+
+#endif /* HAVE_D3D9_HWACCEL */