streamtools/outputs/gmidi-offset.cpp

   1 #include "outputs/internal.hpp"
   2 #include <fstream>
   3 #include <stdexcept>
   4 #include <string>
   5 #include <iostream>
   6
   7 namespace
   8 {
   9         class output_driver_gmidi_offset : public output_driver
  10         {
  11         public:
  12                 output_driver_gmidi_offset(const std::string& filename)
  13                 {
  14                         if(filename != "-")
  15                                 out = new std::ofstream(filename.c_str(), std::ios_base::binary);
  16                         else
  17                                 out = &std::cout;
  18                         if(!*out)
  19                                 throw std::runtime_error("Unable to open output file");
  20
  21                         set_gmidi_callback(make_bound_method(*this, &output_driver_gmidi_offset::midi_data));
  22                         first = true;
  23                 }
  24
  25                 ~output_driver_gmidi_offset()
  26                 {
  27                         if(out != &std::cout)
  28                                 delete out;
  29                 }
  30
  31                 void ready()
  32                 {
  33                 }
  34
  35                 void midi_data(uint64_t timestamp, uint8_t data)
  36                 {
  37                         if(first)
  38                                 (*out) << timestamp << std::endl;
  39                         first = false;
  40                 }
  41
  42         private:
  43                 std::ostream* out;
  44                 bool first;
  45         };
  46
  47         class output_driver_gmidi_offset_factory : output_driver_factory
  48         {
  49         public:
  50                 output_driver_gmidi_offset_factory()
  51                         : output_driver_factory("gmidi-offset")
  52                 {
  53                 }
  54
  55                 output_driver& make(const std::string& type, const std::string& name, const std::string& parameters)
  56                 {
  57                         if(parameters != "")
  58                                 throw std::runtime_error("gmidi-offset output does not take parameters");
  59                         return *new output_driver_gmidi_offset(name);
  60                 }
  61         } factory;
  62 }