[vlc-devel] [PATCH 13/20] hw:d3d11: add a file to control the D3D11 device common to all filters

[Steve Lhomme]

---
 modules/hw/d3d11/Makefile.am      |   3 +-
 modules/hw/d3d11/d3d11_filters.h  |   5 ++
 modules/hw/d3d11/d3d11_instance.c | 106 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 113 insertions(+), 1 deletion(-)
 create mode 100644 modules/hw/d3d11/d3d11_instance.c

diff --git a/modules/hw/d3d11/Makefile.am b/modules/hw/d3d11/Makefile.am
index 4bca091326..33d17efd8f 100644
--- a/modules/hw/d3d11/Makefile.am
+++ b/modules/hw/d3d11/Makefile.am
@@ -3,7 +3,8 @@ d3d11dir = $(pluginsdir)/d3d11
 libdirect3d11_filters_plugin_la_SOURCES = hw/d3d11/d3d11_filters.h \
     hw/d3d11/d3d11_filters.c \
     hw/d3d11/d3d11_deinterlace.c \
-    hw/d3d11/d3d11_surface.c
+    hw/d3d11/d3d11_surface.c \
+    hw/d3d11/d3d11_instance.c
 libdirect3d11_filters_plugin_la_LDFLAGS = $(AM_LDFLAGS) -rpath '$(d3d11dir)'
 libdirect3d11_filters_plugin_la_LIBADD = libchroma_copy.la libdeinterlace_common.la libd3d11_common.la
 if HAVE_WINSTORE
diff --git a/modules/hw/d3d11/d3d11_filters.h b/modules/hw/d3d11/d3d11_filters.h
index 10f1076ea7..c4433937f9 100644
--- a/modules/hw/d3d11/d3d11_filters.h
+++ b/modules/hw/d3d11/d3d11_filters.h
@@ -25,6 +25,8 @@
 
 #include <vlc_common.h>
 
+#include "../../video_chroma/d3d11_fmt.h"
+
 int  D3D11OpenDeinterlace(vlc_object_t *);
 void D3D11CloseDeinterlace(vlc_object_t *);
 int  D3D11OpenConverter(vlc_object_t *);
@@ -32,4 +34,7 @@ void D3D11CloseConverter(vlc_object_t *);
 int  D3D11OpenCPUConverter(vlc_object_t *);
 void D3D11CloseCPUConverter(vlc_object_t *);
 
+void D3D11_FilterHoldInstance(filter_t *, d3d11_device_t *, D3D11_TEXTURE2D_DESC *);
+void D3D11_FilterReleaseInstance(d3d11_device_t *);
+
 #endif /* VLC_D3D11_FILTERS_H */
diff --git a/modules/hw/d3d11/d3d11_instance.c b/modules/hw/d3d11/d3d11_instance.c
new file mode 100644
index 0000000000..1011de4d84
--- /dev/null
+++ b/modules/hw/d3d11/d3d11_instance.c
@@ -0,0 +1,106 @@
+/*****************************************************************************
+ * d3d11_instance.c: D3D11 unique device context instance
+ *****************************************************************************
+ * Copyright © 2017 VLC authors, VideoLAN and VideoLabs
+ *
+ * Authors: Steve Lhomme <robux4 at gmail.com>
+ *
+ * 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_filter.h>
+#include <vlc_picture.h>
+
+#include <assert.h>
+
+#define COBJMACROS
+#include <d3d11.h>
+
+#include "d3d11_filters.h"
+
+static vlc_mutex_t inst_lock = VLC_STATIC_MUTEX;
+static d3d11_device_t device = { .d3dcontext = NULL };
+static size_t instances = 0;
+
+void D3D11_FilterHoldInstance(filter_t *filter, d3d11_device_t *out, D3D11_TEXTURE2D_DESC *dstDesc)
+{
+    picture_t *pic = filter_NewPicture(filter);
+    if (!pic)
+    {
+        out->d3dcontext = NULL;
+        return;
+    }
+
+    picture_sys_t *p_sys = ActivePictureSys(pic);
+
+    vlc_mutex_lock(&inst_lock);
+    if (p_sys)
+    {
+        out->d3dcontext = p_sys->context;
+        ID3D11DeviceContext_GetDevice(out->d3dcontext, &out->d3ddevice);
+        ID3D11Device_Release(out->d3ddevice);
+        if (device.d3dcontext == NULL)
+        {
+            device = *out;
+            instances++;
+        }
+
+        ID3D11Texture2D_GetDesc(p_sys->texture[KNOWN_DXGI_INDEX], dstDesc);
+    }
+    else
+    {
+        *out = device;
+        if (device.d3dcontext != NULL)
+            instances++;
+
+        memset(dstDesc, 0, sizeof(*dstDesc));
+        if (filter->fmt_in.video.i_chroma == VLC_CODEC_D3D11_OPAQUE_10B)
+            dstDesc->Format = DXGI_FORMAT_P010;
+        else
+            dstDesc->Format = DXGI_FORMAT_NV12;
+        dstDesc->Width  = filter->fmt_out.video.i_width;
+        dstDesc->Height = filter->fmt_out.video.i_height;
+    }
+
+    out->owner = false;
+    if (unlikely(out->d3dcontext == NULL))
+        msg_Warn(filter, "no context available");
+    else
+    {
+        ID3D11DeviceContext_AddRef(out->d3dcontext);
+        ID3D11Device_AddRef(out->d3ddevice);
+    }
+
+    vlc_mutex_unlock(&inst_lock);
+
+    picture_Release(pic);
+}
+
+void D3D11_FilterReleaseInstance(d3d11_device_t *d3d_dev)
+{
+    vlc_mutex_lock(&inst_lock);
+    if (d3d_dev->d3dcontext && d3d_dev->d3dcontext == device.d3dcontext)
+    {
+        assert(instances != 0);
+        if (--instances == 0)
+            device.d3dcontext = NULL;
+    }
+    D3D11_ReleaseDevice(d3d_dev);
+    vlc_mutex_unlock(&inst_lock);
+}
-- 
2.14.2