在分层块

时间:2018-04-05 11:20:39

标签: c++ gnuradio gnuradio-companion

我已经实现了一个非常基本的C ++ CCSDS卷积编码器(k = 7,r = 1/2),它工作正常。但是,它非常基本,缺少操作模式(CC_STREAMING,CC_TERMINATED,CC_TAILBITING,CC_TRUNCATED)等选项。等等。因此,我决定使用默认的gnuradio gr :: fec :: code :: cc_encoder类。我的编码超类将包括穿孔和其他块,因此一切都将在分层块中。到目前为止,我将块一个接一个地放在以gr :: fec :: code :: cc_encoder开头的分层块中。下面是我的.cc实现文件。

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <gnuradio/io_signature.h>
#include "debug_conv_encoder_impl.h"

namespace gr {
    namespace baseband {

debug_conv_encoder::sptr
debug_conv_encoder::make(int frame_size, std::vector<int> polys, int mode, int pad)
{
  return gnuradio::get_initial_sptr
    (new debug_conv_encoder_impl(frame_size, polys, mode, pad));
}

/*
 * The private constructor
 */
debug_conv_encoder_impl::debug_conv_encoder_impl(int frame_size, std::vector<int> polys, int mode, int pad)
  : gr::hier_block2("debug_conv_encoder",
          gr::io_signature::make(1, 1, sizeof(unsigned char)),
          gr::io_signature::make(1, 1, sizeof(unsigned char)))
{
  //Creating convolutional encoder
  int k = 7;
  int rate = 2;
  bool d_pad = (pad == 1) ? true : false;
  cc_mode_t d_mode = get_mode(mode);
  gr::fec::code::cc_encoder::sptr encoder(gr::fec::code::cc_encoder::make(frame_size,k,rate,polys,0,d_mode,d_pad));
  //connect(self(),0,self(),0); -- Works fine
  connect(self() , 0 , encoder , 0); // --gives an error
  connect(encoder , 0 , self() , 0); // --gives an error
  //connect(encoder);
}
cc_mode_t debug_conv_encoder_impl::get_mode(int mode)
     {
 switch(mode)
   {
   case 0:
 return CC_STREAMING;
   case 1:
 return CC_TERMINATED;
   case 2:
 return CC_TRUNCATED;
   case 3:
 return CC_TAILBITING;
   default:
 return CC_STREAMING;
   }
   }

/*
 * Our virtual destructor.
 */
debug_conv_encoder_impl::~debug_conv_encoder_impl()
{
}


   } /* namespace baseband */
} /* namespace gr */

这是头文件

#ifndef INCLUDED_BASEBAND_DEBUG_CONV_ENCODER_IMPL_H
#define INCLUDED_BASEBAND_DEBUG_CONV_ENCODER_IMPL_H

#include <baseband/debug_conv_encoder.h>
#include <gnuradio/fec/cc_encoder.h>
namespace gr {
  namespace baseband {

class debug_conv_encoder_impl : public debug_conv_encoder
{
 private:
    cc_mode_t get_mode(int mode);

 public:
  debug_conv_encoder_impl(int frame_size, std::vector<int> polys, int mode, int pad);
  ~debug_conv_encoder_impl();

   // Where all the action really happens
  };

    } // namespace baseband
 } // namespace gr

 #endif /* INCLUDED_BASEBAND_DEBUG_CONV_ENCODER_IMPL_H */

不幸的是,编译和链接文件(cmake ..&amp;&amp; make)会出现此错误:

xxx/GRC/baseband/gr-baseband/lib/debug_conv_encoder_impl.cc:53:39: error: no matching function for call to ‘gr::baseband::debug_conv_encoder_impl::connect(gr::hier_block2::opaque_self, int, gr::fec::generic_encoder::sptr&, int)’
   connect(self() , 0 , encoder , 0);
/usr/local/include/gnuradio/hier_block2.h:105:10: note:   no known conversion for argument 3 from ‘gr::fec::generic_encoder::sptr {aka boost::shared_ptr<gr::fec::generic_encoder>}’ to ‘gr::basic_block_sptr {aka boost::shared_ptr<gr::basic_block>}’

基本上,&#34; gr :: fec :: generic_encoder :: sptr {aka boost :: shared_ptr}'到'gr :: basic_block_sptr {aka boost :: shared_ptr}'&#34;意味着共享指针gr :: fec :: generic_encoder不能根据hier_block2.connect(basic_block_sptr src,int src_port,basic_block_sptr dst,int dst_port)的要求转换为gr :: basic_block。

我用这种方式创建了许多分层块,但从未遇到过这个错误。我很确定我有一些很重要的东西。任何帮助将受到高度赞赏。顺便提一下,如果需要更多信息,请告诉我。 干杯。

2 个答案:

答案 0 :(得分:1)

我终于能够解决这个问题了。结果是Gnu无线电FECAPI提供了编码器变量来定义FEC属性(从gr :: fec :: generic_encoder类派生的类,例如.cc_encoder,ldpc_encoder等)和部署变量(与GNU中的调度程序和编码器变量交互)无线电流程图。部署变量“ gr :: fec :: encoder ”可以与许多编码器变量一起使用,例如cc_encoder或LDPC编码器。工作函数现在如下所示.OOT现在编译并按预期工作。

debug_conv_encoder_impl::debug_conv_encoder_impl(int frame_size, std::vector<int> polys, int mode, int pad)
  : gr::hier_block2("debug_conv_encoder",
          gr::io_signature::make(1, 1, sizeof(unsigned char)),
          gr::io_signature::make(1, 1, sizeof(unsigned char)))
{
  //Creating a coder variable
  int k = 7;
  int rate = 2;
  bool d_pad = (pad == 1) ? true : false;
  cc_mode_t d_mode = get_mode(mode);
  gr::fec::code::cc_encoder::sptr coder_variable(gr::fec::code::cc_encoder::make(frame_size,k,rate,polys,0,d_mode,d_pad));

  //Creating a deployment variable
  gr::fec::encoder::sptr coder_deployment(gr::fec::encoder::make(coder_variable,sizeof(unsigned char),sizeof(unsigned char)));
  connect(self() , 0 , coder_deployment , 0);
  connect(coder_deployment , 0 , self() , 0);
  //connect(encoder);
}

答案 1 :(得分:0)

cc_encoder不是一个块,因此您无法在流程图中将其连接起来。

事实上,你不应该能够实例化它,因为它只是一个抽象基类:

https://gnuradio.org/doc/doxygen/classgr_1_1fec_1_1code_1_1cc__encoder.html

我不太确定你需要什么样的编码器,但无论如何,这个课程还没有结束。