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authorMichael Krelin <hacker@klever.net>2006-08-11 16:01:56 (UTC)
committer Michael Krelin <hacker@klever.net>2006-08-11 16:01:56 (UTC)
commit0c21a7a0d5b84dc6726462f0fbe51b8c32433262 (patch) (side-by-side diff)
tree9df6334cb1a61efebe68f7bcef9aa119a823626a /lib/message.cc
parent9bcc235e575a95989a5903394c127accbeef2e0f (diff)
downloadmidillo-0.0.zip
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initial commit into repository0.0
Diffstat (limited to 'lib/message.cc') (more/less context) (ignore whitespace changes)
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diff --git a/lib/message.cc b/lib/message.cc
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+++ b/lib/message.cc
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+#include <algorithm>
+#include <iterator>
+#include <midillo/message.h>
+#include <midillo/util.h>
+#include <midillo/exception.h>
+
+namespace midillo {
+ using std::copy;
+ using std::ostream_iterator;
+
+ unsigned long message_t::calculate_save_size(int& rs) const {
+ unsigned long rv = 0;
+ if(status!=rs) {
+ ++rv;
+ rs = status;
+ }else if((status&status_event_bits)==status_system) {
+ rs = -1;
+ ++rv; // XXX: is it really needed?
+ }
+ switch(status&status_event_bits) {
+ case status_note_off:
+ case status_note_on:
+ case status_polyphonic_key_pressure: // aka status_aftertouch
+ case status_control_change:
+ case status_pitch_wheel_change:
+ rv += 2; break;
+ case status_program_change:
+ case status_channel_pressure:
+ ++rv; break;
+ case status_system:
+ switch(status&status_system_bits) {
+ case status_system_sysex:
+ case status_system_end_of_sysex:
+ rv += data.size()+1; break;
+ case status_system_MTC_quarter_frame:
+ case status_system_song_select:
+ ++rv; break;
+ case status_system_song_position_pointer:
+ rv += 2; break;
+ case status_system_tune_request:
+ case status_system_timing_clock: // aka status_system_midi_clock
+ case status_system_midi_tick:
+ case status_system_start: // aka status_system_midi_start
+ case status_system_stop: // aka status_system_midi_stop
+ case status_system_continue: // aka status_system_midi_continue
+ case status_system_active_sense:
+ break; /* XXX: ensure there is no data? */
+ case status_system_meta: // also reset, but not for the purpose of midi file
+ ++rv;
+ rv += calcVLsize(data.size());
+ rv += data.size();
+ break;
+ default:
+ throw exception(CODEPOINT,"Internal error");
+ break;
+ }
+ break;
+ default:
+ throw exception(CODEPOINT,"Internal error");
+ break;
+ }
+ return rv;
+ }
+
+ void message_t::save(int& rs,ostream& s) const {
+ if(status!=rs) {
+ s.put(status);
+ if(!s.good())
+ throw exception_output_error(CODEPOINT,"Error writing midi status byte");
+ rs = status;
+ }else if((status&status_event_bits)==status_system) {
+ rs = -1;
+ s.put(status); // XXX: is it really needed?
+ if(!s.good())
+ throw exception_output_error(CODEPOINT,"Error writing midi system status byte");
+ }
+ switch(status&status_event_bits) {
+ case status_note_off:
+ case status_note_on:
+ case status_polyphonic_key_pressure: // aka status_aftertouch
+ case status_control_change:
+ case status_pitch_wheel_change:
+ save_data(s,2); break;
+ case status_program_change:
+ case status_channel_pressure:
+ save_data(s,1); break;
+ case status_system:
+ switch(status&status_system_bits) {
+ case status_system_sysex:
+ case status_system_end_of_sysex:
+ save_sysex(s); break;
+ case status_system_MTC_quarter_frame:
+ case status_system_song_select:
+ save_data(s,1); break;
+ case status_system_song_position_pointer:
+ save_data(s,2); break;
+ case status_system_tune_request:
+ case status_system_timing_clock: // aka status_system_midi_clock
+ case status_system_midi_tick:
+ case status_system_start: // aka status_system_midi_start
+ case status_system_stop: // aka status_system_midi_stop
+ case status_system_continue: // aka status_system_midi_continue
+ case status_system_active_sense:
+ break; /* XXX: ensure there is no data? */
+ case status_system_meta: // also reset, but not for the purpose of midi file
+ s.put(meta_status&0xFF);
+ if(!s.good())
+ throw exception_output_error(CODEPOINT,"Error writing meta event");
+ writeVL(s,data.size());
+ save_data(s);
+ break;
+ default:
+ throw exception(CODEPOINT,"Internal error");
+ break;
+ }
+ break;
+ default:
+ throw exception(CODEPOINT,"Internal error");
+ break;
+ }
+ }
+
+ void message_t::load(int& rs,istream& s) {
+ data.clear();
+ status = s.get();
+ if(!s.good())
+ throw exception_input_error(CODEPOINT,"Error reading MIDI event status byte");
+ if(status&status_bit) {
+ if((status&status_event_bits)!=status_system)
+ rs = status;
+ }else{
+ if(rs<0)
+ throw exception_invalid_input(CODEPOINT,"Attempt to rely on the absent running status");
+ data.push_back(status);
+ status = rs;
+ }
+ switch(status&status_event_bits) {
+ case status_note_off:
+ case status_note_on:
+ case status_polyphonic_key_pressure: // a.k.a. status_aftertouch
+ case status_control_change:
+ case status_pitch_wheel_change:
+ load_data(s,2); break;
+ case status_program_change:
+ case status_channel_pressure:
+ load_data(s,1); break;
+ case status_system:
+ switch(status&status_system_bits) {
+ case status_system_sysex:
+ case status_system_end_of_sysex:
+ load_sysex(s); break;
+ case status_system_MTC_quarter_frame:
+ case status_system_song_select:
+ load_data(s,1); break;
+ case status_system_song_position_pointer:
+ load_data(s,2); break;
+ case status_system_tune_request:
+ case status_system_timing_clock: // a.k.a. status_system_midi_clock
+ case status_system_midi_tick:
+ case status_system_start: // a.k.a. status_system_midi_start
+ case status_system_stop: // a.k.a. status_system_midi_stop
+ case status_system_continue: // a.k.a. status_system_midi_continue
+ case status_system_active_sense:
+ break;
+ case status_system_meta: // also, reset, but not in midi files
+ {
+ meta_status = s.get();
+ if(!s.good())
+ throw exception_input_error(CODEPOINT,"Error reading meta event type");
+ int l = readVL(s);
+ load_data(s,l);
+ }
+ break;
+ default:
+ throw exception(CODEPOINT,"Internal error");
+ break;
+ }
+ break;
+ default:
+ throw exception(CODEPOINT,"Internal error");
+ break;
+ }
+ }
+
+ void message_t::save_data(ostream& s,int c) const {
+ if(c!=data.size())
+ throw exception(CODEPOINT,"Writing corrupt data");
+ save_data(s);
+ }
+
+ void message_t::save_data(ostream& s) const {
+ for(bytes_t::const_iterator i=data.begin();i!=data.end();++i)
+ s.put(*i);
+ if(!s.good())
+ throw exception_output_error(CODEPOINT,"Error writing MIDI message data");
+ }
+
+ void message_t::load_data(istream& s,int c) {
+ c -= data.size();
+ if(c<0)
+ throw exception(CODEPOINT,"Internal error");
+ while(c-- > 0) {
+ data.push_back(s.get());
+ if(!s.good())
+ throw exception_input_error(CODEPOINT,"Error reading MIDI data");
+ }
+ }
+
+ void message_t::save_sysex(ostream& s) const {
+ save_data(s);
+ s.put(0xF7); /* XXX: Or is it better to put it into data? */
+ if(!s.good())
+ throw exception_output_error(CODEPOINT,"Error writing sysex data");
+ }
+
+ void message_t::load_sysex(istream& s) {
+ int b = s.get();
+ if(!s.good())
+ throw exception_input_error(CODEPOINT,"Error reading sysex data");
+ assert(!(b&0x80)); // manufacturer ought to be 7 bit. not sure if it belongs here, it may well be continuation.
+ do {
+ data.push_back(b);
+ b = s.get();
+ if(!s.good())
+ throw exception_input_error(CODEPOINT,"Error reading sysex data");
+ }while(b!=0xF7);
+ }
+
+ void message_t::dump(ostream& s) const {
+ std::ios::fmtflags ff = s.flags();
+ int w = s.width(2);
+ s.unsetf(std::ios::dec); s.setf(std::ios::hex);
+ s << "status=" << status;
+ if(is_meta()) {
+ s << ", meta_status=" << meta_status;
+ }
+ if(!data.empty()) {
+ s << ", data: ";
+ copy(
+ data.begin(), data.end(),
+ ostream_iterator<int>(s," ") );
+ }
+ s.width(w);
+ s.flags(ff);
+ }
+
+}