summaryrefslogtreecommitdiffstats
path: root/libtdemid/track.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'libtdemid/track.cpp')
-rw-r--r--libtdemid/track.cpp566
1 files changed, 566 insertions, 0 deletions
diff --git a/libtdemid/track.cpp b/libtdemid/track.cpp
new file mode 100644
index 000000000..44375b637
--- /dev/null
+++ b/libtdemid/track.cpp
@@ -0,0 +1,566 @@
+/**************************************************************************
+
+ track.cpp - class track, which has a midi file track and its events
+ This file is part of LibKMid 0.9.5
+ Copyright (C) 1997,98,99,2000 Antonio Larrosa Jimenez
+ LibKMid's homepage : http://www.arrakis.es/~rlarrosa/libtdemid.html
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public
+ License as published by the Free Software Foundation; either
+ version 2 of the License, or (at your option) any later version.
+
+ This library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public License
+ along with this library; see the file COPYING.LIB. If not, write to
+ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
+
+ Send comments and bug fixes to Antonio Larrosa <larrosa@kde.org>
+
+***************************************************************************/
+
+#include "track.h"
+#include <stdlib.h>
+#include "sndcard.h"
+#include "midispec.h"
+#include "midfile.h"
+
+#ifndef TRUE
+#define TRUE 1
+#endif
+#ifndef FALSE
+#define FALSE 0
+#endif
+
+#define T2MS(ticks) (((double)ticks)*(double)60000L)/((double)tempoToMetronomeTempo(tempo)*(double)tPCN)
+
+#define MS2T(ms) (((ms)*(double)tempoToMetronomeTempo(tempo)*(double)tPCN)/((double)60000L))
+
+#define PEDANTIC_TRACK
+#define CHANGETEMPO_ONLY_IN_TRACK0
+//#define TRACKDEBUG
+//#define TRACKDEBUG2
+
+MidiTrack::MidiTrack(FILE *file,int tpcn,int Id)
+{
+ id=Id;
+ tPCN=tpcn;
+ currentpos=0;
+ size=0;
+ data=0L;
+ tempo=1000000;
+ if (feof(file))
+ {
+ clear();
+ return;
+ };
+ size=readLong(file);
+#ifdef TRACKDEBUG
+ printf("Track %d : Size %ld\n",id,size);
+#endif
+ data=new uchar[size];
+ if (data==NULL)
+ {
+ perror("track: Not enough memory ?");
+ exit(-1);
+ }
+ ulong rsize=0;
+ if ((rsize=fread(data,1,size,file))!=size)
+ {
+ fprintf(stderr,"track (%d): File is corrupt : Couldn't load track (%ld!=%ld) !!\n", id, rsize, size);
+ size=rsize;
+ };
+ /*
+ ptrdata=data;
+ current_ticks=0;
+ delta_ticks=readVariableLengthValue();
+ wait_ticks=delta_ticks;
+ endoftrack=0;
+ */
+ init();
+}
+
+MidiTrack::~MidiTrack()
+{
+ delete data;
+ endoftrack=1;
+ currentpos=0;
+ size=0;
+}
+
+int MidiTrack::power2to(int i)
+{
+ return 1<<i;
+}
+
+ulong MidiTrack::readVariableLengthValue(void)
+{
+ ulong dticks=0;
+
+ while ((*ptrdata) & 0x80)
+ {
+#ifdef PEDANTIC_TRACK
+ if (currentpos>=size)
+ {
+ endoftrack=1;
+ fprintf(stderr, "track (%d) : EndofTrack found by accident !\n",id);
+ delta_ticks = wait_ticks = ~0;
+ time_at_next_event=10000 * 60000L;
+ return 0;
+ }
+ else
+#endif
+ {
+ dticks=(dticks << 7) | (*ptrdata) & 0x7F;
+ ptrdata++;currentpos++;
+ }
+
+ }
+ dticks=((dticks << 7) | (*ptrdata) & 0x7F);
+ ptrdata++;currentpos++;
+
+#ifdef PEDANTIC_TRACK
+
+ if (currentpos>=size)
+ {
+ endoftrack=1;
+ fprintf(stderr,"track (%d): EndofTrack found by accident 2 !\n",id);
+ dticks=0;
+ delta_ticks = wait_ticks = ~0;
+ time_at_next_event=10000 * 60000L;
+ return 0;
+ }
+#endif
+#ifdef TRACKDEBUG
+ printfdebug("track(%d): DTICKS : %ld\n",id,dticks);
+ usleep(10);
+#endif
+ return dticks;
+}
+
+int MidiTrack::ticksPassed (ulong ticks)
+{
+ if (endoftrack==1) return 0;
+ if (ticks>wait_ticks)
+ {
+ printfdebug("track (%d): ERROR : TICKS PASSED > WAIT TICKS\n", id);
+ return 1;
+ }
+ wait_ticks-=ticks;
+ return 0;
+}
+
+int MidiTrack::msPassed (ulong ms)
+{
+ if (endoftrack==1) return 0;
+ current_time+=ms;
+ //fprintf(stderr, "old + %ld = CURR %g ", ms,current_time);
+ if ( current_time>time_at_next_event )
+ {
+ fprintf(stderr, "track (%d): ERROR : MS PASSED > WAIT MS\n", id);
+ return 1;
+ }
+#ifdef TRACKDEBUG
+ if (current_time==time_at_next_event) printfdebug("track(%d): _OK_",id);
+#endif
+ return 0;
+}
+
+int MidiTrack::currentMs(double ms)
+{
+ if (endoftrack==1) return 0;
+ current_time=ms;
+ //printfdebug("CURR %g",current_time);
+#ifdef PEDANTIC_TRACK
+ if (current_time>time_at_next_event)
+ {
+ fprintf(stderr,"track(%d): ERROR : MS PASSED > WAIT MS\n", id);
+ exit(-1);
+ return 1;
+ }
+#endif
+ return 0;
+}
+
+void MidiTrack::readEvent(MidiEvent *ev)
+{
+ int i,j;
+ if (endoftrack==1)
+ {
+ ev->command=0;
+ return;
+ }
+ /*
+ printfdebug("...... %d\n",id);
+ printfdebug("current : %g , tane : %g\n",current_time,time_at_next_event);
+ printfdebug("......\n");
+ */
+ int skip_event=0;
+ current_time=time_at_next_event;
+ if (((*ptrdata)&0x80)!=0)
+ {
+ ev->command=(*ptrdata);
+ ptrdata++;currentpos++;
+ lastcommand=ev->command;
+ }
+ else
+ {
+ ev->command=lastcommand;
+ }
+
+#ifdef PEDANTIC_TRACK
+ if (currentpos>=size)
+ {
+ endoftrack=1;
+ delta_ticks = wait_ticks = ~0;
+ time_at_next_event=10000 * 60000L;
+ ev->command=MIDI_SYSTEM_PREFIX;
+ ev->chn=0xF;
+ ev->d1=ME_END_OF_TRACK;
+ fprintf(stderr, "track (%d): EndofTrack found by accident 3\n",id);
+ return;
+ }
+#endif
+
+ ev->chn=ev->command & 0xF;
+ ev->command=ev->command & 0xF0;
+ switch (ev->command)
+ {
+ case (MIDI_NOTEON) :
+ ev->note = *ptrdata;ptrdata++;currentpos++;
+ ev->vel = *ptrdata;ptrdata++;currentpos++;
+ if (ev->vel==0)
+ note[ev->chn][ev->note]=FALSE;
+ else
+ note[ev->chn][ev->note]=TRUE;
+
+#ifdef TRACKDEBUG2
+ if (ev->chn==6) {
+ if (ev->vel==0) printfdebug("Note Onf\n");
+ else printfdebug("Note On\n");
+ };
+#endif
+ break;
+ case (MIDI_NOTEOFF) :
+#ifdef TRACKDEBUG2
+ if (ev->chn==6) printfdebug("Note Off\n");
+#endif
+ ev->note = *ptrdata;ptrdata++;currentpos++;
+ ev->vel = *ptrdata;ptrdata++;currentpos++;
+ note[ev->chn][ev->note]=FALSE;
+
+ break;
+ case (MIDI_KEY_PRESSURE) :
+#ifdef TRACKDEBUG2
+ if (ev->chn==6) printfdebug ("Key press\n");
+#endif
+ ev->note = *ptrdata;ptrdata++;currentpos++;
+ ev->vel = *ptrdata;ptrdata++;currentpos++;
+ break;
+ case (MIDI_PGM_CHANGE) :
+#ifdef TRACKDEBUG2
+ if (ev->chn==6) printfdebug ("Pgm\n");
+#endif
+ ev->patch = *ptrdata;ptrdata++;currentpos++;
+ break;
+ case (MIDI_CHN_PRESSURE) :
+#ifdef TRACKDEBUG2
+ if (ev->chn==6) printfdebug ("Chn press\n");
+#endif
+ ev->vel = *ptrdata;ptrdata++;currentpos++;
+ break;
+ case (MIDI_PITCH_BEND) :
+#ifdef TRACKDEBUG2
+ if (ev->chn==6) printfdebug ("Pitch\n");
+#endif
+ ev->d1 = *ptrdata;ptrdata++;currentpos++;
+ ev->d2 = *ptrdata;ptrdata++;currentpos++;
+ break;
+ case (MIDI_CTL_CHANGE) :
+#ifdef TRACKDEBUG2
+ if (ev->chn==6) printfdebug (stderr, "Ctl\n");
+#endif
+ ev->ctl = *ptrdata;ptrdata++; currentpos++;
+ ev->d1 = *ptrdata;ptrdata++;currentpos++;
+ /*
+ switch (ev->ctl)
+ {
+ case (96) : printfdebug("RPN Increment\n");break;
+ case (97) : printfdebug("RPN Decrement\n");break;
+ case (98) : printfdebug("nRPN 98 %d\n",ev->d1);break;
+ case (99) : printfdebug("nRPN 99 %d\n",ev->d1);break;
+ case (100) : printfdebug("RPN 100 %d\n",ev->d1);break;
+ case (101) : printfdebug("RPN 101 %d\n",ev->d1);break;
+ };
+ */
+ break;
+
+ case (MIDI_SYSTEM_PREFIX) :
+#ifdef TRACKDEBUG2
+ if (ev->chn==6) printfdebug ("Sys Prefix\n");
+#endif
+ switch ((ev->command|ev->chn))
+ {
+ case (0xF0) :
+ case (0xF7) :
+ ev->length=readVariableLengthValue();
+#ifdef PEDANTIC_TRACK
+ if (endoftrack)
+ {
+ ev->command=MIDI_SYSTEM_PREFIX;
+ ev->chn=0xF;
+ ev->d1=ME_END_OF_TRACK;
+ }
+ else
+#endif
+ {
+ ev->data=ptrdata;
+ ptrdata+=ev->length;currentpos+=ev->length;
+ }
+ break;
+ case (0xFE):
+ case (0xF8):
+ // printfdebug("Active sensing\n");
+ break;
+ case (META_EVENT) :
+ ev->d1=*ptrdata;ptrdata++;currentpos++;
+ switch (ev->d1)
+ {
+ case (ME_END_OF_TRACK) :
+ i=0;
+ j=0;
+ while ((i<16)&&(note[i][j]==FALSE))
+ {
+ j++;
+ if (j==128) { j=0; i++; };
+ }
+ if (i<16) // that is, if there is any key still pressed
+ {
+ ptrdata--;currentpos--;
+ ev->chn=i;
+ ev->command=MIDI_NOTEOFF;
+ ev->note = j;
+ ev->vel = 0;
+ note[ev->chn][ev->note]=FALSE;
+ fprintf(stderr,"Note Off(simulated)\n");
+ return;
+ }
+ else
+ {
+ endoftrack=1;
+ delta_ticks = wait_ticks = ~0;
+ time_at_next_event=10000 * 60000L;
+#ifdef TRACKDEBUG
+ printfdebug("EndofTrack %d event\n",id);
+#endif
+ }
+ break;
+ case (ME_SET_TEMPO):
+ ev->length=readVariableLengthValue();
+#ifdef PEDANTIC_TRACK
+ if (endoftrack)
+ {
+ ev->command=MIDI_SYSTEM_PREFIX;
+ ev->chn=0xF;
+ ev->d1=ME_END_OF_TRACK;
+ }
+ else
+#endif
+ {
+ ev->data=ptrdata;
+ ptrdata+=ev->length;currentpos+=ev->length;
+ // tempo=((ev->data[0]<<16)|(ev->data[1]<<8)|(ev->data[2]));
+ // ticks_from_previous_tempochange=0;
+ // time_at_previous_tempochange=current_time;
+#ifdef TRACKDEBUG
+ printfdebug("Track %d : Set Tempo : %ld\n",id,tempo);
+#endif
+#ifdef CHANGETEMPO_ONLY_IN_TRACK0
+ if (id!=0) skip_event=1;
+#endif
+ }
+ break;
+ case (ME_TIME_SIGNATURE) :
+ ev->length=*ptrdata;ptrdata++;currentpos++;
+ ev->d2=*ptrdata;ptrdata++;currentpos++;
+ ev->d3=power2to(*ptrdata);ptrdata++;currentpos++;
+ ev->d4=*ptrdata;ptrdata++;currentpos++;
+ ev->d5=*ptrdata;ptrdata++;currentpos++;
+#ifdef TRACKDEBUG
+ printfdebug("TIME SIGNATURE :\n");
+ printfdebug("%d\n",ev->d2);
+ printfdebug("---- %d metronome , %d number of 32nd notes per quarter note\n",ev->d4,ev->d5);
+ printfdebug("%d\n",ev->d3);
+#endif
+ break;
+ case (ME_TRACK_SEQ_NUMBER) :
+ case (ME_TEXT) :
+ case (ME_COPYRIGHT) :
+ case (ME_SEQ_OR_TRACK_NAME) :
+ case (ME_TRACK_INSTR_NAME) :
+ case (ME_LYRIC) :
+ case (ME_MARKER) :
+ case (ME_CUE_POINT) :
+ case (ME_CHANNEL_PREFIX) :
+ case (ME_MIDI_PORT) :
+ case (ME_SMPTE_OFFSET) :
+ case (ME_KEY_SIGNATURE) :
+ ev->length=readVariableLengthValue();
+#ifdef PEDANTIC_TRACK
+ if (endoftrack)
+ {
+ ev->command=MIDI_SYSTEM_PREFIX;
+ ev->chn=0xF;
+ ev->d1=ME_END_OF_TRACK;
+ }
+ else
+#endif
+ {
+ ev->data=ptrdata;
+ ptrdata+=ev->length;currentpos+=ev->length;
+ }
+ break;
+ default:
+#ifdef GENERAL_DEBUG_MESSAGES
+ fprintf(stderr,"track (%d) : Default handler for meta event " \
+ "0x%x\n", id, ev->d1);
+#endif
+ ev->length=readVariableLengthValue();
+#ifdef PEDANTIC_TRACK
+ if (endoftrack)
+ {
+ ev->command=MIDI_SYSTEM_PREFIX;
+ ev->chn=0xF;
+ ev->d1=ME_END_OF_TRACK;
+ }
+ else
+#endif
+ {
+ ev->data=ptrdata;
+ ptrdata+=ev->length;currentpos+=ev->length;
+ }
+ break;
+ }
+ break;
+ default :
+ fprintf(stderr,"track (%d): Default handler for system event 0x%x\n",
+ id, (ev->command|ev->chn));
+ break;
+ }
+ break;
+ default :
+ fprintf(stderr,"track (%d): Default handler for event 0x%x\n",
+ id, (ev->command|ev->chn));
+ break;
+ }
+#ifdef PEDANTIC_TRACK
+ if (currentpos>=size)
+ {
+ endoftrack=1;
+ delta_ticks = wait_ticks = ~0;
+ time_at_next_event=10000 * 60000L;
+ printfdebug("track (%d): EndofTrack reached\n",id);
+ }
+#endif
+ if (endoftrack==0)
+ {
+ current_ticks+=delta_ticks;
+ delta_ticks=readVariableLengthValue();
+#ifdef PEDANTIC_TRACK
+ if (endoftrack)
+ {
+ ev->command=MIDI_SYSTEM_PREFIX;
+ ev->chn=0xF;
+ ev->d1=ME_END_OF_TRACK;
+ return;
+ }
+#endif
+ ticks_from_previous_tempochange+=delta_ticks;
+
+ time_at_next_event=T2MS(ticks_from_previous_tempochange)+time_at_previous_tempochange;
+ /*
+ printf("tane2 : %g, ticks : %g, delta_ticks %ld, tempo : %ld\n",
+ time_at_next_event,ticks_from_previous_tempochange,delta_ticks,tempo);
+ printf("timeatprevtc %g , curr %g\n",time_at_previous_tempochange,current_time);
+ */
+ wait_ticks=delta_ticks;
+
+ }
+ if (skip_event) readEvent(ev);
+}
+
+
+void MidiTrack::clear(void)
+{
+ endoftrack=1;
+ ptrdata=data;
+ current_ticks=0;
+ currentpos=0;
+
+ for (int i=0;i<16;i++)
+ for (int j=0;j<128;j++)
+ note[i][j]=FALSE;
+
+ delta_ticks = wait_ticks = ~0;
+ time_at_previous_tempochange=0;
+ current_time=0;
+ ticks_from_previous_tempochange=0;
+ tempo=1000000;
+ time_at_next_event=10000 * 60000L;
+
+}
+
+
+void MidiTrack::init(void)
+{
+ if (data==0L) { clear(); return; };
+ endoftrack=0;
+ ptrdata=data;
+ current_ticks=0;
+ currentpos=0;
+
+ for (int i=0;i<16;i++)
+ for (int j=0;j<128;j++)
+ note[i][j]=FALSE;
+
+ delta_ticks=readVariableLengthValue();
+ if (endoftrack) return;
+ wait_ticks=delta_ticks;
+
+
+ time_at_previous_tempochange=0;
+ current_time=0;
+ ticks_from_previous_tempochange=wait_ticks;
+ tempo=1000000;
+ time_at_next_event=T2MS(delta_ticks);
+ //printf("tane1 : %g\n",time_at_next_event);
+}
+
+void MidiTrack::changeTempo(ulong t)
+{
+ if (endoftrack==1) return;
+ if (tempo==t) return;
+ double ticks;
+ time_at_previous_tempochange=current_time;
+ ticks=MS2T(time_at_next_event-current_time);
+ tempo=t;
+ time_at_next_event=T2MS(ticks)+current_time;
+ ticks_from_previous_tempochange=ticks;
+
+}
+
+/*
+double MidiTrack::absMsOfNextEvent (void)
+{
+ //printf("%d : %g\n",id,time_at_next_event);
+ return time_at_next_event;
+}
+*/
+
+#undef T2MS
+#undef MS2T
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-25 16:53:15 +0000