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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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cf5ef5635f
Introducing CUDA buffer pool with generic CUDA memory support. Likewise GL memory, any elements which are able to access CUDA device memory directly can map this CUDA memory without upload/download overhead via the "GST_MAP_CUDA" map flag. Also usual GstMemory map/unmap is also possible with internal staging memory. For staging, CUDA Host allocated memory is used (see CuMemAllocHost API). The memory is allowing system access but has lower overhead during GPU upload/download than normal system memory. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1633>
138 lines
4.3 KiB
C
138 lines
4.3 KiB
C
/* GStreamer
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* Copyright (C) <2018-2019> Seungha Yang <seungha.yang@navercorp.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_CUDA_MEMORY_H__
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#define __GST_CUDA_MEMORY_H__
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#include <gst/gst.h>
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#include <gst/gstallocator.h>
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#include <gst/video/video.h>
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#include "gstcudaloader.h"
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#include "gstcudacontext.h"
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G_BEGIN_DECLS
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#define GST_TYPE_CUDA_ALLOCATOR (gst_cuda_allocator_get_type())
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#define GST_CUDA_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CUDA_ALLOCATOR,GstCudaAllocator))
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#define GST_CUDA_ALLOCATOR_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_CUDA_ALLOCATOR,GstCudaAllocatorClass))
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#define GST_CUDA_ALLOCATOR_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), GST_TYPE_CUDA_ALLOCATOR,GstCudaAllocatorClass))
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#define GST_IS_CUDA_ALLOCATOR(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CUDA_ALLOCATOR))
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#define GST_IS_CUDA_ALLOCATOR_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_CUDA_ALLOCATOR))
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#define GST_CUDA_ALLOCATOR_CAST(obj) ((GstCudaAllocator *)(obj))
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#define GST_CUDA_MEMORY_CAST(mem) ((GstCudaMemory *) (mem))
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typedef struct _GstCudaAllocationParams GstCudaAllocationParams;
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typedef struct _GstCudaAllocator GstCudaAllocator;
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typedef struct _GstCudaAllocatorClass GstCudaAllocatorClass;
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typedef struct _GstCudaMemory GstCudaMemory;
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/**
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* GST_MAP_CUDA:
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*
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* Flag indicating that we should map the CUDA device memory
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* instead of to system memory.
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*
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* Combining #GST_MAP_CUDA with #GST_MAP_WRITE has the same semantics as though
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* you are writing to CUDA device/host memory.
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* Conversely, combining #GST_MAP_CUDA with
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* #GST_MAP_READ has the same semantics as though you are reading from
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* CUDA device/host memory
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*/
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#define GST_MAP_CUDA (GST_MAP_FLAG_LAST << 1)
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#define GST_CUDA_MEMORY_TYPE_NAME "gst.cuda.memory"
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/**
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* GST_CAPS_FEATURE_MEMORY_CUDA_MEMORY:
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*
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* Name of the caps feature for indicating the use of #GstCudaMemory
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*/
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#define GST_CAPS_FEATURE_MEMORY_CUDA_MEMORY "memory:CUDAMemory"
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struct _GstCudaAllocationParams
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{
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GstAllocationParams parent;
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GstVideoInfo info;
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};
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struct _GstCudaAllocator
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{
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GstAllocator parent;
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GstCudaContext *context;
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};
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struct _GstCudaAllocatorClass
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{
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GstAllocatorClass parent_class;
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};
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GType gst_cuda_allocator_get_type (void);
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GstAllocator * gst_cuda_allocator_new (GstCudaContext * context);
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GstMemory * gst_cuda_allocator_alloc (GstAllocator * allocator,
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gsize size,
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GstCudaAllocationParams * params);
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/**
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* GstCudaMemoryTransfer:
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* @GST_CUDA_MEMORY_TRANSFER_NEED_DOWNLOAD: the device memory needs downloading
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* to the staging memory
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* @GST_CUDA_MEMORY_TRANSFER_NEED_UPLOAD: the staging memory needs uploading
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* to the device memory
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*/
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typedef enum
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{
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GST_CUDA_MEMORY_TRANSFER_NEED_DOWNLOAD = (GST_MEMORY_FLAG_LAST << 0),
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GST_CUDA_MEMORY_TRANSFER_NEED_UPLOAD = (GST_MEMORY_FLAG_LAST << 1)
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} GstCudaMemoryTransfer;
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struct _GstCudaMemory
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{
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GstMemory mem;
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GstCudaContext *context;
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CUdeviceptr data;
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GstCudaAllocationParams alloc_params;
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/* offset and stride of CUDA device memory */
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gsize offset[GST_VIDEO_MAX_PLANES];
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gint stride;
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/* allocated CUDA Host memory */
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gpointer map_alloc_data;
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/* aligned CUDA Host memory */
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guint8 *align_data;
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/* pointing align_data if the memory is mapped */
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gpointer map_data;
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gint map_count;
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GMutex lock;
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};
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gboolean gst_is_cuda_memory (GstMemory * mem);
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G_END_DECLS
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#endif /* __GST_CUDA_MEMORY_H__ */
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