現在輕量C 相機SDK 已經完成，適用於Windows、Linux 和macOS，我們可以將其整合到其他高階程式語言中。在本文中，我們將探討如何基於 C 相機庫建立 Python 相機 SDK，並使用它與 Dynamsoft Barcode Reader SDK 進行多條碼掃描。
CPython 擴充功能是一個共享函式庫（例如，Windows 上的DLL、Linux 上的.so 或macOS 上的.dylib）可以在執行時載入到Python解釋器中並用於擴展其功能。 lite相機CPython擴充專案的結構如下：
python-lite-camera │ │── include │ ├── Camera.h │ ├── CameraPreview.h │ ├── stb_image_write.h │── lib │ ├── linux │ │ ├── liblitecam.so │ ├── macos │ │ ├── liblitecam.dylib │ ├── windows │ │ ├── litecam.dll │ │ ├── litecam.lib ├── src │ ├── litecam.cpp │ ├── pycamera.h │ ├── pywindow.h │── litecam │ ├── __init__.py │── setup.py │── MANIFEST.in │── README.md
說明：
在setup.py中加入以下內容：
from setuptools.command import build_ext
from setuptools import setup, Extension
import sys
import os
import io
from setuptools.command.install import install
import shutil
from pathlib import Path
lib_dir = ''
sources = [
"src/litecam.cpp",
]
include_dirs = [os.path.join(os.path.dirname(__file__), "include")]
libraries = ['litecam']
extra_compile_args = []
if sys.platform == "linux" or sys.platform == "linux2":
lib_dir = 'lib/linux'
extra_compile_args = ['-std=c++11']
extra_link_args = ["-Wl,-rpath=$ORIGIN"]
elif sys.platform == "darwin":
lib_dir = 'lib/macos'
extra_compile_args = ['-std=c++11']
extra_link_args = ["-Wl,-rpath,@loader_path"]
elif sys.platform == "win32":
lib_dir = 'lib/windows'
extra_link_args = []
else:
raise RuntimeError("Unsupported platform")
long_description = io.open("README.md", encoding="utf-8").read()
module_litecam = Extension(
"litecam",
sources=sources,
include_dirs=include_dirs,
library_dirs=[lib_dir],
libraries=libraries,
extra_compile_args=extra_compile_args,
extra_link_args=extra_link_args,
)
def copyfiles(src, dst):
if os.path.isdir(src):
filelist = os.listdir(src)
for file in filelist:
libpath = os.path.join(src, file)
shutil.copy2(libpath, dst)
else:
shutil.copy2(src, dst)
class CustomBuildExt(build_ext.build_ext):
def run(self):
build_ext.build_ext.run(self)
dst = os.path.join(self.build_lib, "litecam")
copyfiles(lib_dir, dst)
filelist = os.listdir(self.build_lib)
for file in filelist:
filePath = os.path.join(self.build_lib, file)
if not os.path.isdir(file):
copyfiles(filePath, dst)
os.remove(filePath)
class CustomBuildExtDev(build_ext.build_ext):
def run(self):
build_ext.build_ext.run(self)
dev_folder = os.path.join(Path(__file__).parent, 'litecam')
copyfiles(lib_dir, dev_folder)
filelist = os.listdir(self.build_lib)
for file in filelist:
filePath = os.path.join(self.build_lib, file)
if not os.path.isdir(file):
copyfiles(filePath, dev_folder)
class CustomInstall(install):
def run(self):
install.run(self)
setup(name='lite-camera',
version='2.0.1',
description='LiteCam is a lightweight, cross-platform library for capturing RGB frames from cameras and displaying them. Designed with simplicity and ease of integration in mind, LiteCam supports Windows, Linux and macOS platforms.',
long_description=long_description,
long_description_content_type="text/markdown",
author='yushulx',
url='https://github.com/yushulx/python-lite-camera',
license='MIT',
packages=['litecam'],
ext_modules=[module_litecam],
classifiers=[
"Development Status :: 5 - Production/Stable",
"Environment :: Console",
"Intended Audience :: Developers",
"Intended Audience :: Education",
"Intended Audience :: Information Technology",
"Intended Audience :: Science/Research",
"License :: OSI Approved :: MIT License",
"Operating System :: Microsoft :: Windows",
"Operating System :: MacOS",
"Operating System :: POSIX :: Linux",
"Programming Language :: Python",
"Programming Language :: Python :: 3",
"Programming Language :: Python :: 3 :: Only",
"Programming Language :: Python :: 3.6",
"Programming Language :: Python :: 3.7",
"Programming Language :: Python :: 3.8",
"Programming Language :: Python :: 3.9",
"Programming Language :: Python :: 3.10",
"Programming Language :: Python :: 3.11",
"Programming Language :: Python :: 3.12",
"Programming Language :: C++",
"Programming Language :: Python :: Implementation :: CPython",
"Topic :: Scientific/Engineering",
"Topic :: Software Development",
],
cmdclass={
'install': CustomInstall,
'build_ext': CustomBuildExt,
'develop': CustomBuildExtDev},
)
說明：
pycamera.h 檔案定義了用於從相機捕獲幀的 PyCamera Python 類，而 pywindow.h 檔案定義了用於在視窗中顯示幀的 PyWindow Python 類。 litecam.cpp 檔案作為 Python 擴充功能的入口點，其中定義了一些全域方法，並註冊了 PyCamera 和 PyWindow 類別。
python-lite-camera │ │── include │ ├── Camera.h │ ├── CameraPreview.h │ ├── stb_image_write.h │── lib │ ├── linux │ │ ├── liblitecam.so │ ├── macos │ │ ├── liblitecam.dylib │ ├── windows │ │ ├── litecam.dll │ │ ├── litecam.lib ├── src │ ├── litecam.cpp │ ├── pycamera.h │ ├── pywindow.h │── litecam │ ├── __init__.py │── setup.py │── MANIFEST.in │── README.md
from setuptools.command import build_ext
from setuptools import setup, Extension
import sys
import os
import io
from setuptools.command.install import install
import shutil
from pathlib import Path
lib_dir = ''
sources = [
"src/litecam.cpp",
]
include_dirs = [os.path.join(os.path.dirname(__file__), "include")]
libraries = ['litecam']
extra_compile_args = []
if sys.platform == "linux" or sys.platform == "linux2":
lib_dir = 'lib/linux'
extra_compile_args = ['-std=c++11']
extra_link_args = ["-Wl,-rpath=$ORIGIN"]
elif sys.platform == "darwin":
lib_dir = 'lib/macos'
extra_compile_args = ['-std=c++11']
extra_link_args = ["-Wl,-rpath,@loader_path"]
elif sys.platform == "win32":
lib_dir = 'lib/windows'
extra_link_args = []
else:
raise RuntimeError("Unsupported platform")
long_description = io.open("README.md", encoding="utf-8").read()
module_litecam = Extension(
"litecam",
sources=sources,
include_dirs=include_dirs,
library_dirs=[lib_dir],
libraries=libraries,
extra_compile_args=extra_compile_args,
extra_link_args=extra_link_args,
)
def copyfiles(src, dst):
if os.path.isdir(src):
filelist = os.listdir(src)
for file in filelist:
libpath = os.path.join(src, file)
shutil.copy2(libpath, dst)
else:
shutil.copy2(src, dst)
class CustomBuildExt(build_ext.build_ext):
def run(self):
build_ext.build_ext.run(self)
dst = os.path.join(self.build_lib, "litecam")
copyfiles(lib_dir, dst)
filelist = os.listdir(self.build_lib)
for file in filelist:
filePath = os.path.join(self.build_lib, file)
if not os.path.isdir(file):
copyfiles(filePath, dst)
os.remove(filePath)
class CustomBuildExtDev(build_ext.build_ext):
def run(self):
build_ext.build_ext.run(self)
dev_folder = os.path.join(Path(__file__).parent, 'litecam')
copyfiles(lib_dir, dev_folder)
filelist = os.listdir(self.build_lib)
for file in filelist:
filePath = os.path.join(self.build_lib, file)
if not os.path.isdir(file):
copyfiles(filePath, dev_folder)
class CustomInstall(install):
def run(self):
install.run(self)
setup(name='lite-camera',
version='2.0.1',
description='LiteCam is a lightweight, cross-platform library for capturing RGB frames from cameras and displaying them. Designed with simplicity and ease of integration in mind, LiteCam supports Windows, Linux and macOS platforms.',
long_description=long_description,
long_description_content_type="text/markdown",
author='yushulx',
url='https://github.com/yushulx/python-lite-camera',
license='MIT',
packages=['litecam'],
ext_modules=[module_litecam],
classifiers=[
"Development Status :: 5 - Production/Stable",
"Environment :: Console",
"Intended Audience :: Developers",
"Intended Audience :: Education",
"Intended Audience :: Information Technology",
"Intended Audience :: Science/Research",
"License :: OSI Approved :: MIT License",
"Operating System :: Microsoft :: Windows",
"Operating System :: MacOS",
"Operating System :: POSIX :: Linux",
"Programming Language :: Python",
"Programming Language :: Python :: 3",
"Programming Language :: Python :: 3 :: Only",
"Programming Language :: Python :: 3.6",
"Programming Language :: Python :: 3.7",
"Programming Language :: Python :: 3.8",
"Programming Language :: Python :: 3.9",
"Programming Language :: Python :: 3.10",
"Programming Language :: Python :: 3.11",
"Programming Language :: Python :: 3.12",
"Programming Language :: C++",
"Programming Language :: Python :: Implementation :: CPython",
"Topic :: Scientific/Engineering",
"Topic :: Software Development",
],
cmdclass={
'install': CustomInstall,
'build_ext': CustomBuildExt,
'develop': CustomBuildExtDev},
)
PyCamera 結構體表示包裹 C Camera 物件的 Python 物件。此處理程序是一個指向 Camera 類別實例的指標。
PyCamera_dealloc
#include <Python.h> #include <structmember.h> #include "Camera.h"
解除分配 Camera 物件並釋放關聯的記憶體。
PyCamera_new
typedef struct
{
PyObject_HEAD Camera *handler;
} PyCamera;
建立 PyCamera 的新實例。它為Python對象分配內存，創建一個新的Camera對象，並將其分配給self->handler。
開放
static int PyCamera_clear(PyCamera *self)
{
if (self->handler)
{
delete self->handler;
}
return 0;
}
static void PyCamera_dealloc(PyCamera *self)
{
PyCamera_clear(self);
Py_TYPE(self)->tp_free((PyObject *)self);
}
開啟指定索引的相機。
列表媒體類型
static PyObject *PyCamera_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
PyCamera *self;
self = (PyCamera *)type->tp_alloc(type, 0);
if (self != NULL)
{
self->handler = new Camera();
}
return (PyObject *)self;
}
傳回支援的媒體類型清單。對於 Windows，它將寬字串轉換為 Python Unicode 物件。
發布
static PyObject *open(PyObject *obj, PyObject *args)
{
PyCamera *self = (PyCamera *)obj;
int index = 0;
if (!PyArg_ParseTuple(args, "i", &index))
{
return NULL;
}
bool ret = self->handler->Open(index);
return Py_BuildValue("i", ret);
}
釋放相機。
設定解析度
static PyObject *listMediaTypes(PyObject *obj, PyObject *args)
{
PyCamera *self = (PyCamera *)obj;
std::vector<MediaTypeInfo> mediaTypes = self->handler->ListSupportedMediaTypes();
PyObject *pyList = PyList_New(0);
for (size_t i = 0; i < mediaTypes.size(); i++)
{
MediaTypeInfo &mediaType = mediaTypes[i];
#ifdef _WIN32
PyObject *subtypeName = PyUnicode_FromWideChar(mediaType.subtypeName, wcslen(mediaType.subtypeName));
PyObject *pyMediaType = Py_BuildValue("{s:i,s:i,s:O}",
"width", mediaType.width,
"height", mediaType.height,
"subtypeName", subtypeName);
if (subtypeName != NULL)
{
Py_DECREF(subtypeName);
}
#else
PyObject *pyMediaType = Py_BuildValue("{s:i,s:i,s:s}",
"width", mediaType.width,
"height", mediaType.height,
"subtypeName", mediaType.subtypeName);
#endif
PyList_Append(pyList, pyMediaType);
}
return pyList;
}
設定相機的解析度。
捕獲幀
static PyObject *release(PyObject *obj, PyObject *args)
{
PyCamera *self = (PyCamera *)obj;
self->handler->Release();
Py_RETURN_NONE;
}
從相機捕獲幀並將 RGB 資料作為 Python 位元組數組傳回。
getWidth 和 getHeight
static PyObject *setResolution(PyObject *obj, PyObject *args)
{
PyCamera *self = (PyCamera *)obj;
int width = 0, height = 0;
if (!PyArg_ParseTuple(args, "ii", &width, &height))
{
return NULL;
}
int ret = self->handler->SetResolution(width, height);
return Py_BuildValue("i", ret);
}
傳回捕獲幀的寬度和高度。
static PyObject *captureFrame(PyObject *obj, PyObject *args)
{
PyCamera *self = (PyCamera *)obj;
FrameData frame = self->handler->CaptureFrame();
if (frame.rgbData)
{
PyObject *rgbData = PyByteArray_FromStringAndSize((const char *)frame.rgbData, frame.size);
PyObject *pyFrame = Py_BuildValue("iiiO", frame.width, frame.height, frame.size, rgbData);
ReleaseFrame(frame);
return pyFrame;
}
else
{
Py_RETURN_NONE;
}
}
定義 PyCamera Python 物件上可用的方法。這些方法與上面定義的對應 C 函數相關聯。
static PyObject *getWidth(PyObject *obj, PyObject *args)
{
PyCamera *self = (PyCamera *)obj;
int width = self->handler->frameWidth;
return Py_BuildValue("i", width);
}
static PyObject *getHeight(PyObject *obj, PyObject *args)
{
PyCamera *self = (PyCamera *)obj;
int height = self->handler->frameHeight;
return Py_BuildValue("i", height);
}
定義 PyCamera 類型，包括其方法、記憶體分配、釋放和其他行為。
static PyMethodDef instance_methods[] = {
{"open", open, METH_VARARGS, NULL},
{"listMediaTypes", listMediaTypes, METH_VARARGS, NULL},
{"release", release, METH_VARARGS, NULL},
{"setResolution", setResolution, METH_VARARGS, NULL},
{"captureFrame", captureFrame, METH_VARARGS, NULL},
{"getWidth", getWidth, METH_VARARGS, NULL},
{"getHeight", getHeight, METH_VARARGS, NULL},
{NULL, NULL, 0, NULL}};
static PyTypeObject PyCameraType = {
PyVarObject_HEAD_INIT(NULL, 0) "litecam.PyCamera", /* tp_name */
sizeof(PyCamera), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)PyCamera_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_reserved */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
PyObject_GenericGetAttr, /* tp_getattro */
PyObject_GenericSetAttr, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
"PyCamera", /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
instance_methods, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
0, /* tp_init */
0, /* tp_alloc */
PyCamera_new, /* tp_new */
};
定義一個包裝 C CameraWindow 物件的 PyWindow 結構。 handler 成員指向 CameraWindow 的一個實例。
PyWindow_dealloc
#include <Python.h> #include <structmember.h> #include "CameraPreview.h"
取消分配CameraWindow物件並釋放記憶體。
PyWindow_new
typedef struct
{
PyObject_HEAD CameraWindow *handler;
} PyWindow;
建立 PyWindow 的新實例。它為Python物件分配內存，建立一個新的CameraWindow對象，並將其分配給self->handler。
等待鍵
python-lite-camera │ │── include │ ├── Camera.h │ ├── CameraPreview.h │ ├── stb_image_write.h │── lib │ ├── linux │ │ ├── liblitecam.so │ ├── macos │ │ ├── liblitecam.dylib │ ├── windows │ │ ├── litecam.dll │ │ ├── litecam.lib ├── src │ ├── litecam.cpp │ ├── pycamera.h │ ├── pywindow.h │── litecam │ ├── __init__.py │── setup.py │── MANIFEST.in │── README.md
等待按鍵事件，如果按鍵與指定字元匹配則傳回 False。 False 意味著應用程式應該退出。
showFrame
from setuptools.command import build_ext
from setuptools import setup, Extension
import sys
import os
import io
from setuptools.command.install import install
import shutil
from pathlib import Path
lib_dir = ''
sources = [
"src/litecam.cpp",
]
include_dirs = [os.path.join(os.path.dirname(__file__), "include")]
libraries = ['litecam']
extra_compile_args = []
if sys.platform == "linux" or sys.platform == "linux2":
lib_dir = 'lib/linux'
extra_compile_args = ['-std=c++11']
extra_link_args = ["-Wl,-rpath=$ORIGIN"]
elif sys.platform == "darwin":
lib_dir = 'lib/macos'
extra_compile_args = ['-std=c++11']
extra_link_args = ["-Wl,-rpath,@loader_path"]
elif sys.platform == "win32":
lib_dir = 'lib/windows'
extra_link_args = []
else:
raise RuntimeError("Unsupported platform")
long_description = io.open("README.md", encoding="utf-8").read()
module_litecam = Extension(
"litecam",
sources=sources,
include_dirs=include_dirs,
library_dirs=[lib_dir],
libraries=libraries,
extra_compile_args=extra_compile_args,
extra_link_args=extra_link_args,
)
def copyfiles(src, dst):
if os.path.isdir(src):
filelist = os.listdir(src)
for file in filelist:
libpath = os.path.join(src, file)
shutil.copy2(libpath, dst)
else:
shutil.copy2(src, dst)
class CustomBuildExt(build_ext.build_ext):
def run(self):
build_ext.build_ext.run(self)
dst = os.path.join(self.build_lib, "litecam")
copyfiles(lib_dir, dst)
filelist = os.listdir(self.build_lib)
for file in filelist:
filePath = os.path.join(self.build_lib, file)
if not os.path.isdir(file):
copyfiles(filePath, dst)
os.remove(filePath)
class CustomBuildExtDev(build_ext.build_ext):
def run(self):
build_ext.build_ext.run(self)
dev_folder = os.path.join(Path(__file__).parent, 'litecam')
copyfiles(lib_dir, dev_folder)
filelist = os.listdir(self.build_lib)
for file in filelist:
filePath = os.path.join(self.build_lib, file)
if not os.path.isdir(file):
copyfiles(filePath, dev_folder)
class CustomInstall(install):
def run(self):
install.run(self)
setup(name='lite-camera',
version='2.0.1',
description='LiteCam is a lightweight, cross-platform library for capturing RGB frames from cameras and displaying them. Designed with simplicity and ease of integration in mind, LiteCam supports Windows, Linux and macOS platforms.',
long_description=long_description,
long_description_content_type="text/markdown",
author='yushulx',
url='https://github.com/yushulx/python-lite-camera',
license='MIT',
packages=['litecam'],
ext_modules=[module_litecam],
classifiers=[
"Development Status :: 5 - Production/Stable",
"Environment :: Console",
"Intended Audience :: Developers",
"Intended Audience :: Education",
"Intended Audience :: Information Technology",
"Intended Audience :: Science/Research",
"License :: OSI Approved :: MIT License",
"Operating System :: Microsoft :: Windows",
"Operating System :: MacOS",
"Operating System :: POSIX :: Linux",
"Programming Language :: Python",
"Programming Language :: Python :: 3",
"Programming Language :: Python :: 3 :: Only",
"Programming Language :: Python :: 3.6",
"Programming Language :: Python :: 3.7",
"Programming Language :: Python :: 3.8",
"Programming Language :: Python :: 3.9",
"Programming Language :: Python :: 3.10",
"Programming Language :: Python :: 3.11",
"Programming Language :: Python :: 3.12",
"Programming Language :: C++",
"Programming Language :: Python :: Implementation :: CPython",
"Topic :: Scientific/Engineering",
"Topic :: Software Development",
],
cmdclass={
'install': CustomInstall,
'build_ext': CustomBuildExt,
'develop': CustomBuildExtDev},
)
在視窗中顯示一個框架。
繪製輪廓
#include <Python.h> #include <structmember.h> #include "Camera.h"
在框架上繪製輪廓（一系列點）。
繪製文字
typedef struct
{
PyObject_HEAD Camera *handler;
} PyCamera;
在框架上繪製文字。
static int PyCamera_clear(PyCamera *self)
{
if (self->handler)
{
delete self->handler;
}
return 0;
}
static void PyCamera_dealloc(PyCamera *self)
{
PyCamera_clear(self);
Py_TYPE(self)->tp_free((PyObject *)self);
}
定義 PyWindow Python 物件上可用的方法。
static PyObject *PyCamera_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
PyCamera *self;
self = (PyCamera *)type->tp_alloc(type, 0);
if (self != NULL)
{
self->handler = new Camera();
}
return (PyObject *)self;
}
定義 PyWindow 類型，包括其方法、記憶體分配、釋放和其他行為。
static PyObject *open(PyObject *obj, PyObject *args)
{
PyCamera *self = (PyCamera *)obj;
int index = 0;
if (!PyArg_ParseTuple(args, "i", &index))
{
return NULL;
}
bool ret = self->handler->Open(index);
return Py_BuildValue("i", ret);
}
說明：
開發模式
static PyObject *listMediaTypes(PyObject *obj, PyObject *args)
{
PyCamera *self = (PyCamera *)obj;
std::vector<MediaTypeInfo> mediaTypes = self->handler->ListSupportedMediaTypes();
PyObject *pyList = PyList_New(0);
for (size_t i = 0; i < mediaTypes.size(); i++)
{
MediaTypeInfo &mediaType = mediaTypes[i];
#ifdef _WIN32
PyObject *subtypeName = PyUnicode_FromWideChar(mediaType.subtypeName, wcslen(mediaType.subtypeName));
PyObject *pyMediaType = Py_BuildValue("{s:i,s:i,s:O}",
"width", mediaType.width,
"height", mediaType.height,
"subtypeName", subtypeName);
if (subtypeName != NULL)
{
Py_DECREF(subtypeName);
}
#else
PyObject *pyMediaType = Py_BuildValue("{s:i,s:i,s:s}",
"width", mediaType.width,
"height", mediaType.height,
"subtypeName", mediaType.subtypeName);
#endif
PyList_Append(pyList, pyMediaType);
}
return pyList;
}
輪組
static PyObject *release(PyObject *obj, PyObject *args)
{
PyCamera *self = (PyCamera *)obj;
self->handler->Release();
Py_RETURN_NONE;
}
來源分佈
static PyObject *setResolution(PyObject *obj, PyObject *args)
{
PyCamera *self = (PyCamera *)obj;
int width = 0, height = 0;
if (!PyArg_ParseTuple(args, "ii", &width, &height))
{
return NULL;
}
int ret = self->handler->SetResolution(width, height);
return Py_BuildValue("i", ret);
}
安裝Python相機SDK和Dynamsoft Barcode Reader SDK：
static PyObject *captureFrame(PyObject *obj, PyObject *args)
{
PyCamera *self = (PyCamera *)obj;
FrameData frame = self->handler->CaptureFrame();
if (frame.rgbData)
{
PyObject *rgbData = PyByteArray_FromStringAndSize((const char *)frame.rgbData, frame.size);
PyObject *pyFrame = Py_BuildValue("iiiO", frame.width, frame.height, frame.size, rgbData);
ReleaseFrame(frame);
return pyFrame;
}
else
{
Py_RETURN_NONE;
}
}
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建立用於多條碼掃描的 Python 腳本：
static PyObject *getWidth(PyObject *obj, PyObject *args)
{
PyCamera *self = (PyCamera *)obj;
int width = self->handler->frameWidth;
return Py_BuildValue("i", width);
}
static PyObject *getHeight(PyObject *obj, PyObject *args)
{
PyCamera *self = (PyCamera *)obj;
int height = self->handler->frameHeight;
return Py_BuildValue("i", height);
}
將 LICENSE-KEY 替換為您的 Dynamsoft Barcode Reader 許可證金鑰。
運行腳本：
static PyMethodDef instance_methods[] = {
{"open", open, METH_VARARGS, NULL},
{"listMediaTypes", listMediaTypes, METH_VARARGS, NULL},
{"release", release, METH_VARARGS, NULL},
{"setResolution", setResolution, METH_VARARGS, NULL},
{"captureFrame", captureFrame, METH_VARARGS, NULL},
{"getWidth", getWidth, METH_VARARGS, NULL},
{"getHeight", getHeight, METH_VARARGS, NULL},
{NULL, NULL, 0, NULL}};
https://github.com/yushulx/python-lite-camera
以上是建立 Python 相機 SDK 並使用它進行多條碼掃描的詳細內容。更多資訊請關注PHP中文網其他相關文章！
