mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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7b6023d9cf
Adding cudaipc{src,sink} element for CUDA IPC support.
Implementation note:
* For the communication between end points, Win32 named-pipe
and unix domain socket will be used on Windows and Linux respectively.
* cudaipcsink behaves as a server, and all GPU resources will be owned by
the server process and exported for other processes, then cudaipcsrc
(client) will import each exported handle.
* User can select IPC mode via "ipc-mode" property of cudaipcsink.
There are two IPC mode, one is "legacy" which uses legacy CUDA IPC
method and the other is "mmap" which uses CUDA virtual memory API
with OS's resource handle sharing method such as DuplicateHandle()
on Windows. The "mmap" mode might be better than "legacy" in terms
of stability since it relies on OS's resource management but
it would consume more GPU memory than "legacy" mode.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4510>
184 lines
6.6 KiB
C++
184 lines
6.6 KiB
C++
/* GStreamer
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* Copyright (C) 2023 Seungha Yang <seungha@centricular.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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#pragma once
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#include <gst/gst.h>
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#include <gst/video/video.h>
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#include <gst/cuda/gstcuda.h>
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#include <string>
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#include <vector>
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#ifdef G_OS_WIN32
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#include <windows.h>
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#else
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#include <sys/types.h>
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#include <unistd.h>
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#endif
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/*
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* Communication Sequence
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*
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* +--------+ +--------+
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* | client | | server |
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* +--------+ +--------+
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* | |
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* | |
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* +<---------- CONFIG ------------|
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* | |
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* +--------- NEED-DATA ---------->|
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* | +-------+
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* | | Export
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* | | CUDA memory
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* | +<------+
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* +<-------- HAVE-DATA -----------|
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* +--------+ |
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* Import | |
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* CUDA memory | |
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* +------->+ |
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* |--------- READ-DONE ---------->|
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* +--------+ |
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* Release | |
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* CUDA memory | |
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* +--------| |
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* |-------- RELEASE-DATA -------->|
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* | |
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* +--------- NEED-DATA ---------->|
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* | |
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* |<----------- EOS --------------|
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* +--------+ |
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* Cleanup all | |
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* shared resources | |
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* +--------| |
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* |------------ FIN ------------->|
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*/
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enum class GstCudaIpcPktType : guint8
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{
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UNKNOWN,
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CONFIG,
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NEED_DATA,
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HAVE_DATA,
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READ_DONE,
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RELEASE_DATA,
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HAVE_MMAP_DATA,
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RELEASE_MMAP_DATA,
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EOS,
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FIN,
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};
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#ifdef G_OS_WIN32
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typedef HANDLE GstCudaSharableHandle;
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typedef DWORD GstCudaPid;
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#define GST_CUDA_OS_HANDLE_FORMAT "p"
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#else
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typedef int GstCudaSharableHandle;
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typedef pid_t GstCudaPid;
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#define GST_CUDA_OS_HANDLE_FORMAT "d"
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struct OVERLAPPED
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{
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gpointer dummy;
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};
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#endif
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#pragma pack(push, 1)
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struct GstCudaIpcPacketHeader
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{
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GstCudaIpcPktType type;
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guint32 payload_size;
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guint32 magic;
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};
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struct GstCudaIpcMemLayout
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{
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guint32 size;
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guint32 max_size;
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guint32 pitch;
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guint32 offset[4];
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};
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#pragma pack(pop)
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constexpr guint GST_CUDA_IPC_PKT_HEADER_SIZE = sizeof (GstCudaIpcPacketHeader);
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bool gst_cuda_ipc_pkt_identify (std::vector<guint8> & buf,
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GstCudaIpcPacketHeader & header);
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bool gst_cuda_ipc_pkt_build_config (std::vector<guint8> & buf,
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GstCudaPid pid,
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gboolean use_mmap,
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GstCaps * caps);
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bool gst_cuda_ipc_pkt_parse_config (std::vector<guint8> & buf,
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GstCudaPid * pid,
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gboolean * use_mmap,
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GstCaps ** caps);
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void gst_cuda_ipc_pkt_build_need_data (std::vector<guint8> & buf);
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bool gst_cuda_ipc_pkt_build_have_data (std::vector<guint8> & buf,
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GstClockTime pts,
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const GstVideoInfo & info,
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const CUipcMemHandle & handle,
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GstCaps * caps);
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bool gst_cuda_ipc_pkt_parse_have_data (const std::vector<guint8> & buf,
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GstClockTime & pts,
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GstCudaIpcMemLayout & layout,
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CUipcMemHandle & handle,
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GstCaps ** caps);
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bool gst_cuda_ipc_pkt_build_have_mmap_data (std::vector<guint8> & buf,
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GstClockTime pts,
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const GstVideoInfo & info,
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guint32 max_size,
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GstCudaSharableHandle handle,
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GstCaps * caps);
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bool gst_cuda_ipc_pkt_parse_have_mmap_data (const std::vector<guint8> & buf,
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GstClockTime & pts,
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GstCudaIpcMemLayout & layout,
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GstCudaSharableHandle * handle,
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GstCaps ** caps);
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void gst_cuda_ipc_pkt_build_read_done (std::vector<guint8> & buf);
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void gst_cuda_ipc_pkt_build_release_data (std::vector<guint8> & buf,
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const CUipcMemHandle & handle);
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bool gst_cuda_ipc_pkt_parse_release_data (std::vector<guint8> & buf,
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CUipcMemHandle & handle);
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void gst_cuda_ipc_pkt_build_release_mmap_data (std::vector<guint8> & buf,
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GstCudaSharableHandle handle);
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bool gst_cuda_ipc_pkt_parse_release_mmap_data (std::vector<guint8> & buf,
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GstCudaSharableHandle * handle);
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void gst_cuda_ipc_pkt_build_eos (std::vector<guint8> & buf);
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void gst_cuda_ipc_pkt_build_fin (std::vector<guint8> & buf);
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std::string gst_cuda_ipc_mem_handle_to_string (const CUipcMemHandle & handle);
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bool gst_cuda_ipc_clock_is_system (GstClock * clock);
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std::string gst_cuda_ipc_win32_error_to_string (guint err);
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bool gst_cuda_ipc_handle_is_equal (const CUipcMemHandle & handle,
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const CUipcMemHandle & other);
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