non/sequence.C

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2007-12-18 05:09:02 +01:00
/*******************************************************************************/
/* Copyright (C) 2008 Jonathan Moore Liles */
/* */
/* This program is free software; you can redistribute it and/or modify it */
/* under the terms of the GNU General Public License as published by the */
/* Free Software Foundation; either version 2 of the License, or (at your */
/* option) any later version. */
/* */
/* This program 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 General Public License for */
/* more details. */
/* */
/* You should have received a copy of the GNU General Public License along */
/* with This program; see the file COPYING. If not,write to the Free Software */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*******************************************************************************/
#include "sequence.H"
#include "phrase.H"
#include "pattern.H"
#include "smf.H"
#include "non.H"
/* #include <string> */
/* using std::string; */
sequence::sequence ( void )
{
_rd = new data;
_name = _notes = NULL;
_index = 0;
_playing = 0;
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}
void
sequence::lock ( void )
{
// create a copy of the lock-free data.
_rw = new data;
data *d = const_cast< data *> (_rd);
_rw->phrases = d->phrases;
_rw->num = d->num;
}
void
sequence::unlock ( void )
{
_history.push_back( const_cast<data *>( _rd ) );
if ( _history.size() > MAX_UNDO + 1 )
{
data *d = _history.front();
if ( d == _rw || d == _rd )
ASSERTION( "something bad has happend." );
delete d;
_history.pop_front();
}
// swap the copy back in (atomically).
_rd = _rw;
_rw = NULL;
}
void
sequence::insert ( unsigned int n, int pn )
{
lock();
/* if ( n > _rw->phrases.size() ) */
/* _rw->phrases.resize( n + 10 ); */
// MESSAGE( "inserting %d at %d", pn, n );
_rw->phrases.insert( _find( n ), pn );
_rw->num++;
unlock();
}
vector <int>::iterator
sequence::_find ( int n )
{
// boy I hate C++/STL.. So lame.
int i = 0;
for ( vector <int>::iterator e = _rw->phrases.begin(); e != _rw->phrases.end(); e++ )
{
if ( i == n )
return e;
i++;
}
return _rw->phrases.end();
}
void
sequence::remove ( int n )
{
lock();
_rw->phrases.erase( _find( n ) );
_rw->num--;
unlock();
}
/** return the number of phrases in this sequence */
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int
sequence::phrases ( void ) const
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{
return _rd->num;
}
void
sequence::_swap ( int n1, int n2 )
{
int x = _rw->phrases[ n1 ];
_rw->phrases[ n1 ] = _rw->phrases[ n2 ];
_rw->phrases[ n2 ] = x;
}
void
sequence::move ( int n, int dir )
{
lock();
switch ( dir )
{
case UP:
{
if ( n - 1 >= 0 )
_swap( n - 1, n );
break;
}
case DOWN:
{
if ( n + 1 < _rw->num )
_swap( n + 1, n );
break;
}
}
unlock();
}
/* Render sequence to a string.. suitable for display in the UI */
char *
sequence::dump ( void )
{
char *s = (char *)malloc( 256 );
s[0] = '\0';
size_t siz = 256;
int start = 1;
for ( int i = 0; i < _rd->num; i++ )
{
const int len = 256;
char line[len];
int x = _rd->phrases[ i ];
phrase *p = phrase::phrase_by_number( x );
if ( ! p )
return NULL;
snprintf( line, len, "%d\t%d\t%s\n", start, p->number(), p->name() );
start += p->bars();
s = (char *)realloc( s, siz += strlen( line ) + 1 );
strcat( s, line );
}
return s;
}
void
sequence::play ( tick_t start, tick_t end ) const
{
// keep our own copy.
data *d = _rd;
tick_t offset = 0;
for ( int i = 0; i < d->num; i++ )
{
phrase *p = phrase::phrase_by_number( d->phrases[ i ] );
if ( p )
{
tick_t pstart = offset;
tick_t pend = offset + p->length();
// this phrase seems to be current.
if ( pend > start )
{
// FIXME: don't really need to trigger more than once!
_playing = p->number();
_index = start;
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p->trigger( pstart, pend );
p->play( start, end );
break;
}
offset = pend;
}
else
WARNING( "programming error: no such phrase." );
}
}
/** return the number of the currently playing phrase, or 0 if none. */
int
sequence::playing ( void ) const
{
return _playing;
}
/** return the location of the playhead for this sequence */
tick_t
sequence::index ( void ) const
{
return _index;
}
/** return the total length of the sequence in ticks */
tick_t
sequence::length ( void ) const
{
tick_t l = 0;
for ( int i = 0; i < _rd->num; i++ )
{
phrase *p = phrase::phrase_by_number( _rd->phrases[ i ] );
if ( ! p )
break;
l += p->length();
}
return l;
}
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/** return to a blank slate */
void
sequence::reset ( void )
{
// MESSAGE( "reseting" );
lock();
_rw->num = 0;
phrase::reset();
pattern::reset();
unlock();
}
/** load entire sequence from file, replacing everything */
bool
sequence::load ( const char *name )
{
smf f;
f.open( name, smf::READ );
f.read_header();
if ( f.format() != 2 )
{
WARNING( "not a Non song file" );
return false;
}
f.next_track();
MESSAGE( "reading song info" );
/* read song info */
int mode, phrases, patterns;
char *sname, *notes;
if ( ! f.read_song_info( &mode, &phrases, &patterns, &sname, &notes ) )
{
WARNING( "not a Non song file" );
return false;
}
song.play_mode = (play_mode_e)mode;
if ( sname )
this->name( sname );
if ( notes )
this->notes( notes );
/* tear it down */
reset();
MESSAGE( "reading playlist" );
// f.read_playlist( this );
lock();
char *s;
while ( (s = f.read_cue_point() ) )
{
int n;
sscanf( s, "%d:", &n );
_rw->phrases.insert( _find( _rw->num++ ), n );
}
/* read playlist */
MESSAGE( "reading phrases" );
while ( phrases-- && f.next_track() )
{
phrase *p = new phrase;
p->load( &f );
}
MESSAGE( "reading patterns" );
while ( patterns-- && f.next_track() )
{
pattern *p = new pattern;
p->load( &f );
}
unlock();
signal_new_song();
return true;
}
/** save entire sequence to file */
void
sequence::save ( const char *name ) const
{
smf f;
/* open for writing */
f.open( name, smf::WRITE );
f.write_header( 2 );
MESSAGE( "saving playlist" );
f.open_track( NULL, -1 );
MESSAGE( "saving song info" );
f.write_song_info( song.play_mode, phrase::phrases(), pattern::patterns(), this->name(), notes() );
for ( int i = 0; i < _rd->num; ++i )
{
char pat[256];
phrase *p = phrase::phrase_by_number( _rd->phrases[ i ] );
snprintf( pat, 256, "%d: %s", p->number(), p->name() );
f.write_meta_event( smf::CUEPOINT, pat );
}
f.close_track( 0 );
MESSAGE( "saving phrases" );
for ( int i = 0; i < phrase::phrases(); i++ )
{
phrase *p = phrase::phrase_by_number( i + 1 );
p->dump( &f );
}
MESSAGE( "saving patterns" );
for ( int i = 0; i < pattern::patterns(); i++ )
{
pattern *p = pattern::pattern_by_number( i + 1 );
p->dump( &f );
}
}
/*************/
/* Accessors */
/*************/
char *
sequence::name ( void ) const
{
return _name;
}
void
sequence::name ( const char *s )
{
if ( _name ) free( _name );
_name = strdup( s );
}
char *
sequence::notes ( void ) const
{
return _notes;
}
void
sequence::notes ( const char *s )
{
if ( _notes ) free( _notes );
_notes = strdup( s );
}