d3d12: Add helper object for fence operation

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5870>

subprojects/gst-plugins-bad/sys/d3d12/gstd3d12.h

@@ -27,6 +27,7 @@
 #include "gstd3d12commandqueue.h"
 #include "gstd3d12descriptorpool.h"
 #include "gstd3d12device.h"
+#include "gstd3d12fencedatapool.h"
 #include "gstd3d12format.h"
 #include "gstd3d12memory.h"
 #include "gstd3d12utils.h"

subprojects/gst-plugins-bad/sys/d3d12/gstd3d12fencedatapool.cpp

@@ -0,0 +1,240 @@
+/* GStreamer
+ * Copyright (C) 2023 Seungha Yang <seungha@centricular.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstd3d12fencedatapool.h"
+#include <gst/base/gstqueuearray.h>
+#include <mutex>
+#include <queue>
+
+GST_DEBUG_CATEGORY_STATIC (gst_d3d12_fence_data_pool_debug);
+#define GST_CAT_DEFAULT gst_d3d12_fence_data_pool_debug
+
+struct NotifyData
+{
+  gpointer user_data = nullptr;
+  GDestroyNotify notify = nullptr;
+};
+
+static void
+notify_data_clear_func (NotifyData * data)
+{
+  if (data->notify)
+    data->notify (data->user_data);
+
+  data->user_data = nullptr;
+  data->notify = nullptr;
+}
+
+/* *INDENT-OFF* */
+struct _GstD3D12FenceData : public GstMiniObject
+{
+  _GstD3D12FenceData ()
+  {
+    queue = gst_queue_array_new_for_struct (sizeof (NotifyData), 4);
+    gst_queue_array_set_clear_func (queue,
+        (GDestroyNotify) notify_data_clear_func);
+  }
+
+  ~_GstD3D12FenceData ()
+  {
+    gst_queue_array_free (queue);
+  }
+
+  GstD3D12FenceDataPool *pool = nullptr;
+  GstQueueArray *queue;
+};
+
+GST_DEFINE_MINI_OBJECT_TYPE (GstD3D12FenceData, gst_d3d12_fence_data);
+
+struct GstD3D12FenceDataPoolPrivate
+{
+  ~GstD3D12FenceDataPoolPrivate ()
+  {
+    while (!data_pool.empty ()) {
+      auto data = data_pool.front ();
+      data_pool.pop ();
+      gst_mini_object_unref (data);
+    }
+  }
+
+  std::mutex lock;
+  std::queue<GstD3D12FenceData *>data_pool;
+};
+/* *INDENT-ON* */
+
+struct _GstD3D12FenceDataPool
+{
+  GstObject parent;
+
+  GstD3D12FenceDataPoolPrivate *priv;
+};
+
+static void gst_d3d12_fence_data_pool_finalize (GObject * object);
+
+#define gst_d3d12_fence_data_pool_parent_class parent_class
+G_DEFINE_TYPE (GstD3D12FenceDataPool,
+    gst_d3d12_fence_data_pool, GST_TYPE_OBJECT);
+
+static void
+gst_d3d12_fence_data_pool_class_init (GstD3D12FenceDataPoolClass * klass)
+{
+  auto object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = gst_d3d12_fence_data_pool_finalize;
+
+  GST_DEBUG_CATEGORY_INIT (gst_d3d12_fence_data_pool_debug,
+      "d3d12fencedatapool", 0, "d3d12fencedatapool");
+}
+
+static void
+gst_d3d12_fence_data_pool_init (GstD3D12FenceDataPool * self)
+{
+  self->priv = new GstD3D12FenceDataPoolPrivate ();
+}
+
+static void
+gst_d3d12_fence_data_pool_finalize (GObject * object)
+{
+  auto self = GST_D3D12_FENCE_DATA_POOL (object);
+
+  delete self->priv;
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+GstD3D12FenceDataPool *
+gst_d3d12_fence_data_pool_new (void)
+{
+  auto self = (GstD3D12FenceDataPool *)
+      g_object_new (GST_TYPE_D3D12_FENCE_DATA_POOL, nullptr);
+  gst_object_ref_sink (self);
+
+  return self;
+}
+
+static void
+gst_d3d12_fence_data_pool_release (GstD3D12FenceDataPool * pool,
+    GstD3D12FenceData * data)
+{
+  auto priv = pool->priv;
+  gst_queue_array_clear (data->queue);
+
+  {
+    std::lock_guard < std::mutex > lk (priv->lock);
+    data->dispose = nullptr;
+    data->pool = nullptr;
+    priv->data_pool.push (data);
+  }
+
+  gst_object_unref (pool);
+}
+
+static void
+gst_d3d12_fence_data_free (GstD3D12FenceData * data)
+{
+  delete data;
+}
+
+static gboolean
+gst_d3d12_fence_data_dispose (GstD3D12FenceData * data)
+{
+  if (!data->pool)
+    return TRUE;
+
+  gst_mini_object_ref (data);
+  gst_d3d12_fence_data_pool_release (data->pool, data);
+  return FALSE;
+}
+
+static GstD3D12FenceData *
+gst_d3d12_fence_data_new (void)
+{
+  auto data = new GstD3D12FenceData ();
+
+  gst_mini_object_init (data, 0, gst_d3d12_fence_data_get_type (),
+      nullptr, nullptr, (GstMiniObjectFreeFunction) gst_d3d12_fence_data_free);
+
+  return data;
+}
+
+gboolean
+gst_d3d12_fence_data_pool_acquire (GstD3D12FenceDataPool * pool,
+    GstD3D12FenceData ** data)
+{
+  g_return_val_if_fail (GST_IS_D3D12_FENCE_DATA_POOL (pool), FALSE);
+  g_return_val_if_fail (data, FALSE);
+
+  auto priv = pool->priv;
+  GstD3D12FenceData *new_data = nullptr;
+
+  {
+    std::lock_guard < std::mutex > lk (priv->lock);
+    if (!priv->data_pool.empty ()) {
+      new_data = priv->data_pool.front ();
+      priv->data_pool.pop ();
+    }
+  }
+
+  if (!new_data)
+    new_data = gst_d3d12_fence_data_new ();
+
+  new_data->pool = (GstD3D12FenceDataPool *) gst_object_ref (pool);
+  new_data->dispose =
+      (GstMiniObjectDisposeFunction) gst_d3d12_fence_data_dispose;
+
+  *data = new_data;
+
+  return TRUE;
+}
+
+void
+gst_d3d12_fence_data_add_notify (GstD3D12FenceData * data, gpointer user_data,
+    GDestroyNotify notify)
+{
+  g_return_if_fail (data);
+
+  NotifyData notify_data;
+
+  notify_data.user_data = user_data;
+  notify_data.notify = notify;
+
+  gst_queue_array_push_tail_struct (data->queue, &notify_data);
+}
+
+GstD3D12FenceData *
+gst_d3d12_fence_data_ref (GstD3D12FenceData * data)
+{
+  return (GstD3D12FenceData *) gst_mini_object_ref (data);
+}
+
+void
+gst_d3d12_fence_data_unref (GstD3D12FenceData * data)
+{
+  gst_mini_object_unref (data);
+}
+
+void
+gst_clear_d3d12_fence_data (GstD3D12FenceData ** data)
+{
+  gst_clear_mini_object (data);
+}

subprojects/gst-plugins-bad/sys/d3d12/gstd3d12fencedatapool.h

@@ -0,0 +1,50 @@
+/* GStreamer
+ * Copyright (C) 2023 Seungha Yang <seungha@centricular.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#pragma once
+
+#include <gst/gst.h>
+#include <gst/video/video.h>
+#include "gstd3d12_fwd.h"
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_D3D12_FENCE_DATA_POOL (gst_d3d12_fence_data_pool_get_type())
+G_DECLARE_FINAL_TYPE (GstD3D12FenceDataPool,
+    gst_d3d12_fence_data_pool, GST, D3D12_FENCE_DATA_POOL, GstObject);
+
+typedef struct _GstD3D12FenceData GstD3D12FenceData;
+
+GstD3D12FenceDataPool * gst_d3d12_fence_data_pool_new (void);
+
+gboolean                gst_d3d12_fence_data_pool_acquire (GstD3D12FenceDataPool * pool,
+                                                           GstD3D12FenceData ** data);
+
+void                    gst_d3d12_fence_data_add_notify (GstD3D12FenceData * data,
+                                                         gpointer user_data,
+                                                         GDestroyNotify notify);
+
+GstD3D12FenceData *     gst_d3d12_fence_data_ref (GstD3D12FenceData * data);
+
+void                    gst_d3d12_fence_data_unref (GstD3D12FenceData * data);
+
+void                    gst_clear_d3d12_fence_data (GstD3D12FenceData ** data);
+
+G_END_DECLS
+

subprojects/gst-plugins-bad/sys/d3d12/meson.build

@@ -9,6 +9,7 @@ d3d12_sources = [
   'gstd3d12descriptorpool.cpp',
   'gstd3d12device.cpp',
   'gstd3d12download.cpp',
+  'gstd3d12fencedatapool.cpp',
   'gstd3d12format.cpp',
   'gstd3d12h264dec.cpp',
   'gstd3d12h265dec.cpp',