video/out/d3d11: add d3d11 composition mode support

Author: saltpi

DOCS/man/options.rst

@@ -6124,6 +6124,14 @@ them.
     support D3D11. While the extended GPU features will work with WARP, they
     can be very slow.
 
+``--d3d11-output-mode=<auto|window|composition>``
+    Use a specific output mode for creating the D3D11 swapchain. "composition" will
+    not create a window. If you want to use the D3D11 GPU backend in WinUI
+    applications, you need to set this to "composition". "window" will create a
+    window and use the DWM to present the video. "auto" is the same as "window".
+    After creating the swapchain, you can get the swapchain address(int64 type value) by getting the
+    ``display-swapchain`` property.
+
 ``--d3d11-feature-level=<12_1|12_0|11_1|11_0|10_1|10_0|9_3|9_2|9_1>``
     Select a specific feature level when using the D3D11 GPU backend. By
     default, the highest available feature level is used. This option can be

player/command.c

@@ -2512,6 +2512,19 @@ static struct mp_image_params get_video_out_params(struct MPContext *mpctx)
     return o_params;
 }
 
+static int mp_property_vo_display_swapchain(void *ctx, struct m_property *prop,
+    int action, void *arg)
+{
+    MPContext *mpctx = ctx;
+    struct vo *vo = mpctx->video_out;
+    if (!vo)
+        return M_PROPERTY_UNAVAILABLE;
+
+    int64_t swapchain = (intptr_t)vo_get_display_swapchain(vo);
+
+    return m_property_int64_ro(action, arg, swapchain);
+}
+
 static int mp_property_vo_imgparams(void *ctx, struct m_property *prop,
                                     int action, void *arg)
 {
@@ -4318,6 +4331,7 @@ static const struct m_property mp_properties_base[] = {
     {"deinterlace-active", mp_property_deinterlace},
     {"idle-active", mp_property_idle},
     {"window-id", mp_property_window_id},
+    {"display-swapchain", mp_property_vo_display_swapchain},
 
     {"chapter-list", mp_property_list_chapters},
     {"track-list", mp_property_list_tracks},

video/out/d3d11/context.c

@@ -36,6 +36,7 @@ struct d3d11_opts {
     int output_format;
     int color_space;
     bool exclusive_fs;
+    int output_mode;
 };
 
 #define OPT_BASE_STRUCT struct d3d11_opts
@@ -82,6 +83,12 @@ const struct m_sub_options d3d11_conf = {
             .flags = UPDATE_VO,
         },
         {"d3d11-exclusive-fs", OPT_BOOL(exclusive_fs)},
+        {"d3d11-output-mode", OPT_CHOICE(output_mode,
+            {"auto", -1},
+            {"window", 0},
+            {"composition", 1}),
+             .flags = UPDATE_VO,
+        },
         {0}
     },
     .defaults = &(const struct d3d11_opts) {
@@ -92,6 +99,7 @@ const struct m_sub_options d3d11_conf = {
         .adapter_name = NULL,
         .output_format = DXGI_FORMAT_UNKNOWN,
         .color_space = -1,
+        .output_mode = -1,
     },
     .size = sizeof(struct d3d11_opts)
 };
@@ -157,7 +165,9 @@ static bool resize(struct ra_ctx *ctx)
 
 static bool d3d11_reconfig(struct ra_ctx *ctx)
 {
-    vo_w32_config(ctx->vo);
+    if (!ctx->opts.composition) {
+        vo_w32_config(ctx->vo);
+    }
     return resize(ctx);
 }
 
@@ -454,7 +464,7 @@ static int d3d11_control(struct ra_ctx *ctx, int *events, int request, void *arg
         fullscreen_switch_needed = false;
     }
 
-    ret = vo_w32_control(ctx->vo, events, request, arg);
+    ret = ctx->opts.composition ? VO_TRUE : vo_w32_control(ctx->vo, events, request, arg);
 
     // if entering full screen, handle d3d11 after general windowing stuff
     if (fullscreen_switch_needed && p->vo_opts->fullscreen) {
@@ -481,7 +491,11 @@ static void d3d11_uninit(struct ra_ctx *ctx)
     if (ctx->ra)
         ra_tex_free(ctx->ra, &p->backbuffer);
     SAFE_RELEASE(p->swapchain);
-    vo_w32_uninit(ctx->vo);
+    if (!ctx->opts.composition) {
+        vo_w32_uninit(ctx->vo);
+    } else {
+        vo_w32_swapchain(ctx->vo, NULL);
+    }
     SAFE_RELEASE(p->device);
 
     // Destroy the RA last to prevent objects we hold from showing up in D3D's
@@ -534,10 +548,11 @@ static bool d3d11_init(struct ra_ctx *ctx)
     if (!ctx->ra)
         goto error;
 
-    if (!vo_w32_init(ctx->vo))
+    ctx->opts.composition = p->opts->output_mode == 1;
+    if (!ctx->opts.composition && !vo_w32_init(ctx->vo))
         goto error;
 
-    if (ctx->opts.want_alpha)
+    if (!ctx->opts.composition && ctx->opts.want_alpha)
         vo_w32_set_transparency(ctx->vo, ctx->opts.want_alpha);
 
     UINT usage = DXGI_USAGE_RENDER_TARGET_OUTPUT | DXGI_USAGE_SHADER_INPUT;
@@ -548,7 +563,7 @@ static bool d3d11_init(struct ra_ctx *ctx)
     }
 
     struct d3d11_swapchain_opts scopts = {
-        .window = vo_w32_hwnd(ctx->vo),
+        .window = ctx->opts.composition ? NULL : vo_w32_hwnd(ctx->vo),
         .width = ctx->vo->dwidth,
         .height = ctx->vo->dheight,
         .format = p->opts->output_format,
@@ -563,6 +578,9 @@ static bool d3d11_init(struct ra_ctx *ctx)
     if (!mp_d3d11_create_swapchain(p->device, ctx->log, &scopts, &p->swapchain))
         goto error;
 
+    if (ctx->opts.composition) {
+        vo_w32_swapchain(ctx->vo, p->swapchain);
+    }
     return true;
 
 error:

video/out/gpu/context.h

@@ -12,6 +12,7 @@ struct ra_ctx_opts {
     bool want_alpha;      // create an alpha framebuffer if possible
     bool debug;           // enable debugging layers/callbacks etc.
     bool probing;        // the backend was auto-probed
+    bool composition;    // enable swapchain composition
     struct m_obj_settings *context_list; // list of `ra_ctx_fns.name` to probe
     struct m_obj_settings *context_type_list;  // list of `ra_ctx_fns.type` to probe
 };

video/out/gpu/d3d11_helpers.c

@@ -674,8 +674,14 @@ static HRESULT create_swapchain_1_2(ID3D11Device *dev, IDXGIFactory2 *factory,
         desc.BufferCount = 1;
     }
 
-    hr = IDXGIFactory2_CreateSwapChainForHwnd(factory, (IUnknown*)dev,
+    if (opts->window == NULL) {
+        desc.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
+        hr = IDXGIFactory2_CreateSwapChainForComposition(factory, (IUnknown*)dev,
+        &desc, NULL, &swapchain1);
+    } else {
+        hr = IDXGIFactory2_CreateSwapChainForHwnd(factory, (IUnknown*)dev,
         opts->window, &desc, NULL, NULL, &swapchain1);
+    }
     if (FAILED(hr))
         goto done;
     hr = IDXGISwapChain1_QueryInterface(swapchain1, &IID_IDXGISwapChain,

video/out/vo.c

@@ -1414,6 +1414,11 @@ double vo_get_display_fps(struct vo *vo)
     return res;
 }
 
+void * vo_get_display_swapchain(struct vo *vo)
+{
+    return vo->display_swapchain;
+}
+
 // Set specific event flags, and wakeup the playback core if needed.
 // vo_query_and_reset_events() can retrieve the events again.
 void vo_event(struct vo *vo, int event)

video/out/vo.h

@@ -525,6 +525,9 @@ struct vo {
 
     // current GPU context (--vo=gpu and --vo=gpu-next only)
     const char *context_name;
+
+    // composition swapchain (--d3d11-output-mode=composition only)
+    void *display_swapchain;
 };
 
 struct mpv_global;
@@ -559,6 +562,7 @@ double vo_get_vsync_interval(struct vo *vo);
 double vo_get_estimated_vsync_interval(struct vo *vo);
 double vo_get_estimated_vsync_jitter(struct vo *vo);
 double vo_get_display_fps(struct vo *vo);
+void * vo_get_display_swapchain(struct vo *vo);
 double vo_get_delay(struct vo *vo);
 void vo_discard_timing_info(struct vo *vo);
 struct vo_frame *vo_get_current_vo_frame(struct vo *vo);

video/out/w32_common.c

@@ -2499,6 +2499,11 @@ HWND vo_w32_hwnd(struct vo *vo)
     return w32->window; // immutable, so no synchronization needed
 }
 
+void vo_w32_swapchain(struct vo *vo, void *swapchain)
+{
+    vo->display_swapchain = swapchain;
+}
+
 void vo_w32_run_on_thread(struct vo *vo, void (*cb)(void *ctx), void *ctx)
 {
     struct vo_w32_state *w32 = vo->w32;

video/out/w32_common.h

@@ -31,6 +31,7 @@ void vo_w32_uninit(struct vo *vo);
 int vo_w32_control(struct vo *vo, int *events, int request, void *arg);
 void vo_w32_config(struct vo *vo);
 HWND vo_w32_hwnd(struct vo *vo);
+void vo_w32_swapchain(struct vo *vo, void *swapchain);
 void vo_w32_run_on_thread(struct vo *vo, void (*cb)(void *ctx), void *ctx);
 void vo_w32_set_transparency(struct vo *vo, bool enable);