iOS集成威视达康摄像头库

前言

前段时间公司接入一个摄像头SDK, 刚接入就一堆报错问题, 后面一步步排查, 才所有都解决了.
不得不说摄像头SDK的OC代码是真的水. 摊手

当时环境信息
XCode: 10.2.1 版本
iOS: 选中最低 10.0 版本

坑

AVFoundation

报错如下

Undefined symbols for architecture arm64:
  "_OBJC_CLASS_$_AVAudioSession", referenced from:
      objc-class-ref in xx.a(xxx.o)
      objc-class-ref in xxx.a(xxx.o)
  "_AVAudioSessionCategoryPlayAndRecord", referenced from:

导入对应的 AVFoundation 库即可

不过我这边是用 pod 做本地库依赖, 所以我是在 .podspec 里面加入依赖, 如下

s.frameworks = 'AVFoundation'

库不支持 Bitcode

报错如下

'xxx' does not contain bitcode. You must rebuild it with bitcode enabled (Xcode setting ENABLE_BITCODE), obtain an updated library from the vendor, or disable bitcode for this target. file 'xxxx' for architecture arm64

关闭 Bitcode

C++ QuarterPelWpAvg 报错

报错如下

Undefined symbols for architecture arm64:
  "_QuarterPelWpAvg_8x4_20_asm", referenced from:
...
  "_QuarterPelWpAvg_8x4_13_asm", referenced from:
...
  "_QuarterPelWpAvg_4x4_12_asm", referenced from:
...
  "_QuarterPelWpAvg_8x4_12_asm", referenced from:
...
  "_QuarterPelWpAvg_8x4_11_asm", referenced from:
...
  "_QuarterPelWpAvg_8x4_10_asm", referenced from:
...
  "_QuarterPelWpAvg_8x4_03_asm", referenced from:
...
  "_QuarterPelWP_8x4_00_asm", referenced from:
      _QuarterPelWP_00_arm in xxxx(InterMc_arm.o)
  "_QuarterPelWpAvg_8x4_30_asm", referenced from:
      _QuarterPelWpAvg_30_arm in xxxx(InterMc_arm.o)
  "_QuarterPelWpAvg_4x4_02_asm", referenced from:
      _QuarterPelWpAvg_02_arm in xxxx(InterMc_arm.o)
  "_QuarterPelWpAvg_8x4_02_asm", referenced from:
      _QuarterPelWpAvg_02_arm in xxxx(InterMc_arm.o)
  "_QuarterPelWpAvg_8x4_01_asm", referenced from:
      _QuarterPelWpAvg_01_arm in xxxx(InterMc_arm.o)
  "_QuarterPelWpAvg_8x4_00_asm", referenced from:
      _QuarterPelWpAvg_00_arm in xxxx(InterMc_arm.o)
  "_QuarterPelWP_4x4_33_asm", referenced from:
      _QuarterPelWP_33_arm in xxxx(InterMc_arm.o)
  "_QuarterPelWP_4x4_32_asm", referenced from:
.......

解决如下, Enable Testability 设为 NO

参考 https://blog.csdn.net/xqwin/article/details/81670560

libz

报错如下

Undefined symbols for architecture arm64:
  "_inflateSync", referenced from:
        ...
  "_inflateReset", referenced from:
        ...
  "_compress2", referenced from:
        ...
  "_inflateEnd", referenced from:
        ...
  "_deflate", referenced from:
        ...
  "_compress", referenced from:
        ...
  "_deflateReset", referenced from:
        ...
  "_deflateBound", referenced from:
        ...
  "_deflateInit2_", referenced from:
        ...
  "_inflate", referenced from:
      ...
  "_uncompress", referenced from:
      ...
  "_deflateEnd", referenced from:
        ...
  "_inflateInit_", referenced from:
      ...
  "_inflateInit2_", referenced from:
      ...
  "_deflateInit_", referenced from:
      ...
  "_zlibCompileFlags", referenced from:
      ...
ld: symbol(s) not found for architecture arm64

同上面 AVFoundation, 在过滤输入框输入 libz, 然后选中 libz.tbd

同样, 我 .podspec 加入

s.libraries = 'z'

libiconv

报错如下

Undefined symbols for architecture arm64:
  "_iconv", referenced from:
....
  "_iconv_open", referenced from:
....
  "_iconv_close", referenced from:
....
ld: symbol(s) not found for architecture arm64

同上面 AVFoundation, 在过滤输入框输入 libiconv, 然后选中 libiconv.tbd

同样, 我 .podspec 加入

s.libraries = 'z', 'iconv'

libbz2

报错如下

ndefined symbols for architecture arm64:
  "_BZ2_bzDecompressInit", referenced from:
...
  "_BZ2_bzDecompress", referenced from:
...
  "_BZ2_bzDecompressEnd", referenced from:
...
ld: symbol(s) not found for architecture arm64

同上面 AVFoundation, 在过滤输入框输入 libbz2, 然后选中 libbz2.tbd

同样, 我 .podspec 加入

s.libraries = 'z', 'iconv', 'bz2'

iOS 库包含 C++ 代码

当我开心打包成库的时候, 放到项目内…shi.t, 还有报错, 最终各种查资料, 换姿势, 原来只需要在项目内创建一个类(随便什么都行), 然后把 .m 改为 .mm , 就成功编译过了.

报错如下

Undefined symbols for architecture arm64:
  "typeinfo for std::length_error", referenced from:
      std::__1::__split_buffer&>::__split_buffer(unsigned long, unsigned long, std::__1::allocator&) in (MagLowpowerDevice.o)
  "___cxa_throw", referenced from:
      std::__1::__split_buffer&>::__split_buffer(unsigned long, unsigned long, std::__1::allocator&) in (MagLowpowerDevice.o)
  "std::__1::basic_string, std::__1::allocator >::compare(char const*) const", referenced from:
      CMagLowpowerDevice::RegDeviceNode(std::__1::basic_string, std::__1::allocator >) in (MagLowpowerDevice.o)
  "std::length_error::~length_error()", referenced from:
      std::__1::__split_buffer&>::__split_buffer(unsigned long, unsigned long, std::__1::allocator&) in (MagLowpowerDevice.o)
  "std::__1::basic_string, std::__1::allocator >::assign(char const*)", referenced from:
      CMagLowpowerDevice::RegDeviceNode(std::__1::basic_string, std::__1::allocator >) in (MagLowpowerDevice.o)
  "std::__1::__vector_base_common::__throw_out_of_range() const", referenced from:
      std::__1::vector >::at(unsigned long) in (MagLowpowerDevice.o)
  "std::__1::__vector_base_common::__throw_length_error() const", referenced from:
      void std::__1::vector >::__push_back_slow_path(NODE_SERVER_INFO const&&&) in (MagLowpowerDevice.o)
  "___cxa_free_exception", referenced from:
      std::__1::__split_buffer&>::__split_buffer(unsigned long, unsigned long, std::__1::allocator&) in (MagLowpowerDevice.o)
  "operator delete[](void*)", referenced from:
      CMagLowpowerDevice::SendMasterMegage(std::__1::basic_string, std::__1::allocator >&) in (MagLowpowerDevice.o)
      CMagLowpowerDevice::SendNodeServerMegage(int, std::__1::basic_string, std::__1::allocator >&) in (MagLowpowerDevice.o)
      CMagLowpowerDevice::NodeServerRecvProess() in (MagLowpowerDevice.o)
      CCircleBuf::Release() in (CircleBuf.o)
      CCircleBuf::Create(int) in (CircleBuf.o)
      CCircleBuf::ReadOneFrame1(int&, VIDEO_BUF_HEAD&) in 
      CPPPPChannel::SafeDel(char*) in (PPPPChannel-861088B11FC92685.o)
      

至此, 整个坑算是走完了, 虽说编译是坑, 但摄像头用起来还算行. 只能说摄像头厂商那边根本没考虑对接人员快速上手SDK问题. ( 或许程序员并不算用户 ? )