gstreamer/subprojects/gst-plugins-bad/sys/nvcodec/gstcudaipc.h

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/* 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 <gst/cuda/gstcuda.h>
#include <string>
#include <vector>
#ifdef G_OS_WIN32
#include <windows.h>
#else
#include <sys/types.h>
#include <unistd.h>
#endif
/*
* Communication Sequence
*
* +--------+ +--------+
* | client | | server |
* +--------+ +--------+
* | |
* | |
* +<---------- CONFIG ------------|
* | |
* +--------- NEED-DATA ---------->|
* | +-------+
* | | Export
* | | CUDA memory
* | +<------+
* +<-------- HAVE-DATA -----------|
* +--------+ |
* Import | |
* CUDA memory | |
* +------->+ |
* |--------- READ-DONE ---------->|
* +--------+ |
* Release | |
* CUDA memory | |
* +--------| |
* |-------- RELEASE-DATA -------->|
* | |
* +--------- NEED-DATA ---------->|
* | |
* |<----------- EOS --------------|
* +--------+ |
* Cleanup all | |
* shared resources | |
* +--------| |
* |------------ FIN ------------->|
*/
enum class GstCudaIpcPktType : guint8
{
UNKNOWN,
CONFIG,
NEED_DATA,
HAVE_DATA,
READ_DONE,
RELEASE_DATA,
HAVE_MMAP_DATA,
RELEASE_MMAP_DATA,
EOS,
FIN,
};
#ifdef G_OS_WIN32
typedef HANDLE GstCudaSharableHandle;
typedef DWORD GstCudaPid;
#define GST_CUDA_OS_HANDLE_FORMAT "p"
#else
typedef int GstCudaSharableHandle;
typedef pid_t GstCudaPid;
#define GST_CUDA_OS_HANDLE_FORMAT "d"
struct OVERLAPPED
{
gpointer dummy;
};
#endif
#pragma pack(push, 1)
struct GstCudaIpcPacketHeader
{
GstCudaIpcPktType type;
guint32 payload_size;
guint32 magic;
};
struct GstCudaIpcMemLayout
{
guint32 size;
guint32 max_size;
guint32 pitch;
guint32 offset[4];
};
#pragma pack(pop)
constexpr guint GST_CUDA_IPC_PKT_HEADER_SIZE = sizeof (GstCudaIpcPacketHeader);
bool gst_cuda_ipc_pkt_identify (std::vector<guint8> & buf,
GstCudaIpcPacketHeader & header);
bool gst_cuda_ipc_pkt_build_config (std::vector<guint8> & buf,
GstCudaPid pid,
gboolean use_mmap,
GstCaps * caps);
bool gst_cuda_ipc_pkt_parse_config (std::vector<guint8> & buf,
GstCudaPid * pid,
gboolean * use_mmap,
GstCaps ** caps);
void gst_cuda_ipc_pkt_build_need_data (std::vector<guint8> & buf);
bool gst_cuda_ipc_pkt_build_have_data (std::vector<guint8> & buf,
GstClockTime pts,
const GstVideoInfo & info,
const CUipcMemHandle & handle,
GstCaps * caps,
const std::vector<guint8> & meta);
bool gst_cuda_ipc_pkt_parse_have_data (const std::vector<guint8> & buf,
GstClockTime & pts,
GstCudaIpcMemLayout & layout,
CUipcMemHandle & handle,
GstCaps ** caps,
std::vector<guint8> & meta);
bool gst_cuda_ipc_pkt_build_have_mmap_data (std::vector<guint8> & buf,
GstClockTime pts,
const GstVideoInfo & info,
guint32 max_size,
GstCudaSharableHandle handle,
GstCaps * caps,
const std::vector<guint8> & meta);
bool gst_cuda_ipc_pkt_parse_have_mmap_data (const std::vector<guint8> & buf,
GstClockTime & pts,
GstCudaIpcMemLayout & layout,
GstCudaSharableHandle * handle,
GstCaps ** caps,
std::vector<guint8> & meta);
void gst_cuda_ipc_pkt_build_read_done (std::vector<guint8> & buf);
void gst_cuda_ipc_pkt_build_release_data (std::vector<guint8> & buf,
const CUipcMemHandle & handle);
bool gst_cuda_ipc_pkt_parse_release_data (std::vector<guint8> & buf,
CUipcMemHandle & handle);
void gst_cuda_ipc_pkt_build_release_mmap_data (std::vector<guint8> & buf,
GstCudaSharableHandle handle);
bool gst_cuda_ipc_pkt_parse_release_mmap_data (std::vector<guint8> & buf,
GstCudaSharableHandle * handle);
void gst_cuda_ipc_pkt_build_eos (std::vector<guint8> & buf);
void gst_cuda_ipc_pkt_build_fin (std::vector<guint8> & buf);
std::string gst_cuda_ipc_mem_handle_to_string (const CUipcMemHandle & handle);
bool gst_cuda_ipc_clock_is_system (GstClock * clock);
std::string gst_cuda_ipc_win32_error_to_string (guint err);
bool gst_cuda_ipc_handle_is_equal (const CUipcMemHandle & handle,
const CUipcMemHandle & other);