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d3d12memory: Don't use persistent staging buffer map

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Persistent map is not recommended in case of readback

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5919>
This commit is contained in:
Seungha Yang 2024-01-14 21:22:39 +09:00 committed by GStreamer Marge Bot
parent 077470913d
commit 0cceb6f68f
1 changed files with 31 additions and 16 deletions
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47
subprojects/gst-plugins-bad/sys/d3d12/gstd3d12memory.cpp
View file

@ -227,6 +227,7 @@ struct _GstD3D12MemoryPrivate
DXGI_FORMAT resource_formats[GST_VIDEO_MAX_PLANES];
guint srv_inc_size;
guint rtv_inc_size;
guint64 cpu_map_count = 0;
std::mutex lock;
};
@ -262,13 +263,6 @@ gst_d3d12_memory_ensure_staging_resource (GstD3D12Memory * dmem)
return FALSE;
}
/* And map persistently */
hr = staging->Map (0, nullptr, &priv->staging_ptr);
if (!gst_d3d12_result (hr, dmem->device)) {
GST_ERROR_OBJECT (dmem->device, "Couldn't map readback resource");
return FALSE;
}
priv->staging = staging;
GST_MINI_OBJECT_FLAG_SET (dmem, GST_D3D12_MEMORY_TRANSFER_NEED_DOWNLOAD);
@ -387,27 +381,48 @@ gst_d3d12_memory_map_full (GstMemory * mem, GstMapInfo * info, gsize maxsize)
return priv->resource.Get ();
}
if (!gst_d3d12_memory_ensure_staging_resource (dmem)) {
GST_ERROR_OBJECT (mem->allocator,
"Couldn't create readback_staging resource");
return nullptr;
}
if (priv->cpu_map_count == 0) {
if (!gst_d3d12_memory_ensure_staging_resource (dmem)) {
GST_ERROR_OBJECT (mem->allocator,
"Couldn't create readback_staging resource");
return nullptr;
}
if (!gst_d3d12_memory_download (dmem)) {
GST_ERROR_OBJECT (mem->allocator, "Couldn't download resource");
return nullptr;
if (!gst_d3d12_memory_download (dmem)) {
GST_ERROR_OBJECT (mem->allocator, "Couldn't download resource");
return nullptr;
}
auto hr = priv->staging->Map (0, nullptr, &priv->staging_ptr);
if (!gst_d3d12_result (hr, dmem->device)) {
GST_ERROR_OBJECT (dmem->device, "Couldn't map readback resource");
return nullptr;
}
}
if ((flags & GST_MAP_WRITE) != 0)
GST_MINI_OBJECT_FLAG_SET (mem, GST_D3D12_MEMORY_TRANSFER_NEED_UPLOAD);
priv->cpu_map_count++;
return priv->staging_ptr;
}
static void
gst_d3d12_memory_unmap_full (GstMemory * mem, GstMapInfo * info)
{
/* Nothing to do here */
auto dmem = GST_D3D12_MEMORY_CAST (mem);
auto priv = dmem->priv;
GstMapFlags flags = info->flags;
if ((flags & GST_MAP_D3D12) == 0) {
std::lock_guard < std::mutex > lk (priv->lock);
g_assert (priv->cpu_map_count != 0);
priv->cpu_map_count--;
if (priv->cpu_map_count == 0)
priv->staging->Unmap (0, nullptr);
}
}
static GstMemory *