Merge branch 'instance_d3d11' into 'master'

Draft: (WIP) libplacebo: add d3d11 instance module

Closes #27284

See merge request videolan/vlc!3206

modules/video_output/libplacebo/Makefile.am

@@ -55,3 +55,15 @@ if HAVE_GLES2
 vout_LTLIBRARIES += $(LTLIBplacebo_gles2)
 EXTRA_LTLIBRARIES += libplacebo_gles2_plugin.la
 endif
+
+### D3D11 ###
+libplacebo_d3d11_plugin_la_SOURCES = $(LIBPLACEBO_COMMONSOURCES) \
+				     video_output/libplacebo/instance_d3d11.c
+libplacebo_d3d11_plugin_la_CFLAGS = $(AM_CFLAGS) $(LIBPLACEBO_CFLAGS)
+libplacebo_d3d11_plugin_la_LIBADD = $(LIBPLACEBO_LIBS)
+libplacebo_d3d11_plugin_la_LDFLAGS = $(AM_LDFLAGS) -rpath '$(voutdir)'
+
+if HAVE_WIN32
+vout_LTLIBRARIES += $(LTLIBplacebo_d3d11)
+EXTRA_LTLIBRARIES += libplacebo_d3d11_plugin.la
+endif

modules/video_output/libplacebo/instance_d3d11.c

@@ -0,0 +1,116 @@
+/**
+ * @file instance_d3d11.c
+ * @brief D3D11 specific libplacebo GPU wrapper
+ */
+/*****************************************************************************
+ * Copyright © 2023 Niklas Haas
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <vlc_common.h>
+#include <vlc_plugin.h>
+
+#include <libplacebo/d3d11.h>
+
+#include "instance.h"
+#include "utils.h"
+
+struct vlc_placebo_system_t {
+    pl_d3d11 d3d11;
+};
+
+static void CloseInstance(vlc_placebo_t *pl);
+static const struct vlc_placebo_operations instance_opts =
+{
+    .close = CloseInstance,
+};
+
+static int InitInstance(vlc_placebo_t *pl, const vout_display_cfg_t *cfg)
+{
+    vlc_window_t *window = cfg->window;
+    if (window->type != VLC_WINDOW_TYPE_HWND)
+        return VLC_EGENERIC;
+
+    vlc_placebo_system_t *sys = pl->sys =
+        vlc_obj_calloc(VLC_OBJECT(pl), 1, sizeof (*sys));
+    if (unlikely(sys == NULL))
+        return VLC_ENOMEM;
+
+    // Create d3d11 device
+    sys->d3d11 = pl_d3d11_create(pl->log, &(struct pl_d3d11_params) {
+        .allow_software = var_InheritBool(pl, "d3d11-allow-sw"),
+        .max_frame_latency = var_InheritInteger(pl, "d3d11-max-latency"),
+    });
+    if (!sys->d3d11)
+        goto error;
+
+    // Create swapchain
+    struct pl_d3d11_swapchain_params swap_params = {
+        .window = window->handle.hwnd,
+    };
+
+    pl->swapchain = pl_d3d11_create_swapchain(sys->d3d11, &swap_params);
+    if (!pl->swapchain)
+        goto error;
+
+    pl->gpu = sys->d3d11->gpu;
+    pl->ops = &instance_opts;
+    return VLC_SUCCESS;
+
+error:
+    CloseInstance(pl);
+    return VLC_EGENERIC;
+}
+
+static void CloseInstance(vlc_placebo_t *pl)
+{
+    vlc_placebo_system_t *sys = pl->sys;
+
+    pl_swapchain_destroy(&pl->swapchain);
+    pl_d3d11_destroy(&sys->opengl);
+
+    vlc_obj_free(VLC_OBJECT(pl), sys);
+    pl->sys = NULL;
+}
+
+#define DEBUG_TEXT "Enable API debugging"
+#define DEBUG_LONGTEXT "This loads the d3d11 standard debugging layers, which can help catch runtime errors."
+
+#define ALLOWSW_TEXT "Allow software devices"
+#define ALLOWSW_LONGTEXT "If enabled, allow the use of software emulation devices, which are not real devices and therefore typically very slow."
+
+#define MAXLATENCY_TEXT "Maximum frame latency"
+#define MAXLATENCY_LONGTEXT "Affects how many frames to render/present in advance. Increasing this can improve performance at the cost of latency, by allowing better pipelining between frames. May have no effect, depending on the VLC clock settings."
+
+vlc_module_begin()
+    set_shortname("libplacebo D3D11")
+    set_description(N_("D3D11-based GPU instance"))
+    set_subcategory(SUBCAT_VIDEO_VOUT)
+    set_capability("libplacebo gpu", 50)
+    set_callback(InitInstance)
+    add_shortcut("pl_d3d11")
+
+    set_section("Device creation", NULL)
+    add_bool("d3d11-debug", false, DEBUG_TEXT, DEBUG_LONGTEXT)
+    add_bool("d3d11-allow-sw", pl_d3d11_default_params.allow_software,
+            ALLOWSW_TEXT, ALLOWSW_LONGTEXT)
+    add_integer_with_range("d3d11-max-latency", 3,
+            1, 8, MAXLATENCY_TEXT, MAXLATENCY_LONGTEXT)
+vlc_module_end()