src/midi-stream.cc

   1 //
   2 // midi-stream.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 "midi-item.hh"
  13 #include "midi-stream.hh"
  14 #include "debug.hh"
  15 #include "string-convert.hh"
  16
  17 Midi_stream::Midi_stream( String filename_str, int tracks_i, int clocks_per_4_i )
  18 {
  19     filename_str_ = filename_str;
  20     tracks_i_ = tracks_i;
  21     clocks_per_4_i_ = clocks_per_4_i;
  22     os_p_ = 0;
  23     open();
  24     header();
  25 }
  26
  27 Midi_stream::~Midi_stream()
  28 {
  29     delete os_p_;
  30 }
  31
  32 Midi_stream&
  33 Midi_stream::operator <<( String str )
  34 {
  35     // still debugging...
  36     if ( check_debug )
  37         str = String_convert::bin2hex_str( str );
  38     // string now 1.0.26-2 handles binary streaming
  39     *os_p_ << str;
  40     return *this;
  41 }
  42
  43 Midi_stream&
  44 Midi_stream::operator <<( Midi_item& mitem_r )
  45 {
  46     mitem_r.output_midi( *this );
  47     if ( check_debug )
  48         *os_p_ << "\n";
  49     return *this;
  50 }
  51
  52 Midi_stream&
  53 Midi_stream::operator <<( int i )
  54 {
  55     // output binary string ourselves
  56     *this << Midi_item::i2varint_str( i );
  57     return *this;
  58 }
  59
  60 void
  61 Midi_stream::header()
  62 {
  63 //    *os_p_ << "% Creator: " << get_version();
  64 //    *os_p_ << "% Automatically generated, at ";
  65 //    time_t t(time(0));
  66 //    *os_p_ << ctime(&t);
  67
  68 //                4D 54 68 64     MThd
  69 //    String str = "MThd";
  70 //                00 00 00 06     chunk length
  71 //                00 01   format 1
  72 //                00 01   one track
  73 //                00 60   96 per quarter-note
  74
  75 //    char const ch_c_l = "0000" "0006" "0001" "0001" "0060";
  76 //    str += String_convert::hex2bin_str( ch_c_l );
  77 //    *os_p_ << str;
  78
  79 //      *this << Midi_header( 1, 1, tempo_i_ );
  80       *this << Midi_header( 1, tracks_i_, clocks_per_4_i_ );
  81 }
  82
  83 void
  84 Midi_stream::open()
  85 {
  86     os_p_ = new ofstream( filename_str_ );
  87     if ( !*os_p_ )
  88         error ("can't open `" + filename_str_ + "\'" );
  89 }