src/midistream.cc

   1 //
   2 // midistream.cc
   3 //
   4 // source file of the LilyPond music typesetter
   5 //
   6 // (c) 1997 Jan Nieuwenhuizen <jan@digicash.com>
   7
   8 #include <fstream.h>
   9 #include <time.h>
  10 #include "main.hh"
  11 #include "misc.hh"
  12 #include "midiitem.hh"
  13 #include "midistream.hh"
  14 #include "debug.hh"
  15
  16 Midi_stream::Midi_stream( String filename_str, int tracks_i, int clocks_per_4_i )
  17 {
  18     filename_str_ = filename_str;
  19     tracks_i_ = tracks_i;
  20     clocks_per_4_i_ = clocks_per_4_i;
  21     os_p_ = 0;
  22     open();
  23     header();
  24 }
  25
  26 Midi_stream::~Midi_stream()
  27 {
  28     delete os_p_;
  29 }
  30
  31 Midi_stream&
  32 Midi_stream::operator <<( String str )
  33 {
  34     // still debugging...
  35     if ( check_debug )
  36         str = String_convert::bin2hex_str( str );
  37     // string now 1.0.26-2 handles binary streaming
  38     *os_p_ << str;
  39     return *this;
  40 }
  41
  42 Midi_stream&
  43 Midi_stream::operator <<( Midi_item& mitem_r )
  44 {
  45     mitem_r.output_midi( *this );
  46     if ( check_debug )
  47         *os_p_ << "\n";
  48     return *this;
  49 }
  50
  51 Midi_stream&
  52 Midi_stream::operator <<( int i )
  53 {
  54     // output binary string ourselves
  55     *this << Midi_item::i2varint_str( i );
  56     return *this;
  57 }
  58
  59 void
  60 Midi_stream::header()
  61 {
  62 //    *os_p_ << "% Creator: " << get_version();
  63 //    *os_p_ << "% Automatically generated, at ";
  64 //    time_t t(time(0));
  65 //    *os_p_ << ctime(&t);
  66
  67 //                4D 54 68 64     MThd
  68 //    String str = "MThd";
  69 //                00 00 00 06     chunk length
  70 //                00 01   format 1
  71 //                00 01   one track
  72 //                00 60   96 per quarter-note
  73
  74 //    char const ch_c_l = "0000" "0006" "0001" "0001" "0060";
  75 //    str += String_convert::hex2bin_str( ch_c_l );
  76 //    *os_p_ << str;
  77
  78 //      *this << Midi_header( 1, 1, tempo_i_ );
  79       *this << Midi_header( 1, tracks_i_, clocks_per_4_i_ );
  80 }
  81
  82 void
  83 Midi_stream::open()
  84 {
  85     os_p_ = new ofstream( filename_str_ );
  86     if ( !*os_p_ )
  87         error ("can't open `" + filename_str_ + "\'" );
  88 }