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virtualx-engine/modules/chibi/cp_player_data_notes.cpp
Rémi Verschelde c7bc44d5ad Welcome in 2017, dear changelog reader! 
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer
with state-of-the-art rendering techniques tuned to work as low as middle
end handheld devices - without compromising with the possibilities given
for higher end desktop games of course. Great times ahead for the Godot
community and the gamers that will play our games!
2017-01-01 22:03:33 +01:00

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/*************************************************************************/
/* cp_player_data_notes.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "cp_player_data.h"
#include "cp_sample_manager.h"
#define RANDOM_MAX 2147483647
static inline int32_t cp_random_generate(int32_t *seed) {
int32_t k;
int32_t s = (int32_t)(*seed);
if (s == 0)
s = 0x12345987;
k = s / 127773;
s = 16807 * (s - k * 127773) - 2836 * k;
if (s < 0)
s += 2147483647;
(*seed) = (int32_t)s;
return (int32_t)(s & RANDOM_MAX);
}
void CPPlayer::process_new_note(int p_track,uint8_t p_note) { // if there's really a new note....
if (control.channel[p_track].real_note!=255) {
control.channel[p_track].old_note=control.channel[p_track].real_note;
}
control.channel[p_track].real_note=p_note;
control.channel[p_track].kick=KICK_NOTE;
control.channel[p_track].sample_start_index=-1;
control.channel[p_track].sliding=0;
control.channel[p_track].row_has_note=true;
control.channel[p_track].last_event_usecs=song_usecs;
if (control.channel[p_track].panbrello_type) control.channel[p_track].panbrello_position=0;
}
bool CPPlayer::process_new_instrument(int p_track,uint8_t p_instrument) {
// bool different_instrument=false;
ERR_FAIL_INDEX_V(p_instrument,CPSong::MAX_INSTRUMENTS,false);
if ( song->has_instruments() ) {
control.channel[p_track].instrument_ptr=song->get_instrument(p_instrument);
} else {
control.channel[p_track].instrument_ptr=NULL;
}
control.channel[p_track].retrig_counter=0;
control.channel[p_track].tremor_position=0;
control.channel[p_track].sample_offset_fine=0;
int old_instr_index=control.channel[p_track].instrument_index;
control.channel[p_track].instrument_index=p_instrument;
return (old_instr_index!=p_instrument);
}
// returns if it was able to process
bool CPPlayer::process_note_and_instrument(int p_track,int p_note,int p_instrument) {
bool aux_result;
aux_result=false;
CPSample *aux_sample=0; // current sample
int dest_sample_index;
bool new_instrument=false;
control.channel[p_track].row_has_note=false; // wise man says.. "we dont have a note... until we really know we have a note".
control.channel[p_track].new_instrument=false;
if ( (p_note<0) && (p_instrument<0) ) return aux_result; // nothing to do here
if ( (p_note==255) && (p_instrument==255) ) return aux_result;
if ( (p_note>=0) && (p_note<120) ) {
process_new_note(p_track,p_note);
} else if (p_note==CPNote::CUT) {
control.channel[p_track].aux_volume=0;
control.channel[p_track].note_end_flags|=END_NOTE_OFF;
control.channel[p_track].note_end_flags|=END_NOTE_KILL;
return aux_result;
} else if ((p_note==CPNote::OFF) && (song->has_instruments())) {
if (control.channel[p_track].instrument_ptr!=NULL) {
control.channel[p_track].note_end_flags|=END_NOTE_OFF;
if (!control.channel[p_track].instrument_ptr->get_volume_envelope()->is_enabled() || control.channel[p_track].instrument_ptr->get_volume_envelope()->is_loop_enabled()) {
control.channel[p_track].note_end_flags|=END_NOTE_FADE;
}
}
return aux_result;
} else return aux_result; // invalid note!
if ( (p_instrument>=0) && (p_instrument<CPSong::MAX_INSTRUMENTS)) {
new_instrument=process_new_instrument(p_track,p_instrument);
if ( song->has_instruments() ) {
// If we're in instrument mode...
if ( control.channel[p_track].instrument_ptr->get_sample_number(control.channel[p_track].real_note) >= CPSong::MAX_SAMPLES) {
control.channel[p_track].kick=KICK_NOTHING;
return aux_result;
} else {
dest_sample_index=control.channel[p_track].instrument_ptr->get_sample_number(control.channel[p_track].real_note);
control.channel[p_track].note=control.channel[p_track].instrument_ptr->get_note_number(control.channel[p_track].real_note);
}
} else {
// If we're in sample mode...
dest_sample_index=control.channel[p_track].instrument_index;
control.channel[p_track].note=control.channel[p_track].real_note;
}
control.channel[p_track].sample_index=dest_sample_index;
aux_sample=song->get_sample(dest_sample_index);
if (!CPSampleManager::get_singleton()->check( aux_sample->get_sample_data() )) {
/* INVALID SAMPLE */
control.channel[p_track].kick=KICK_NOTHING;
return aux_result;
}
aux_sample=song->get_sample(dest_sample_index);
} else {
if (!control.channel[p_track].sample_ptr)
return aux_result;
if (song->has_instruments()) {
if (!control.channel[p_track].instrument_ptr)
return aux_result;
control.channel[p_track].note=control.channel[p_track].instrument_ptr->get_note_number(control.channel[p_track].real_note);
} else {
control.channel[p_track].note=control.channel[p_track].real_note;
}
aux_sample=control.channel[p_track].sample_ptr;
}
if (p_instrument>=CPSong::MAX_INSTRUMENTS && control.channel[p_track].sample_ptr!=aux_sample) {
control.channel[p_track].new_instrument=(control.channel[p_track].period>0);
}
control.channel[p_track].sample_ptr=aux_sample;
/* channel or instrument determined panning ? */
control.channel[p_track].panning=control.channel[p_track].channel_panning;
/* set filter,if any ? */
if (aux_sample->is_pan_enabled()) {
control.channel[p_track].panning=(int)aux_sample->get_pan()*255/64;
} else if ( song->has_instruments() && (control.channel[p_track].instrument_ptr->is_pan_default_enabled()) ) {
control.channel[p_track].panning=(int)control.channel[p_track].instrument_ptr->get_pan_default_amount()*255/64;
}
if (song->has_instruments()) {
/* Pitch-Pan Separation */
if ((control.channel[p_track].instrument_ptr->get_pan_pitch_separation()!=0) && (control.channel[p_track].channel_panning!=PAN_SURROUND)){
control.channel[p_track].panning+=((control.channel[p_track].real_note-control.channel[p_track].instrument_ptr->get_pan_pitch_center())*control.channel[p_track].instrument_ptr->get_pan_pitch_separation())/8;
if (control.channel[p_track].panning<PAN_LEFT) control.channel[p_track].panning=PAN_LEFT;
if (control.channel[p_track].panning>PAN_RIGHT) control.channel[p_track].panning=PAN_RIGHT;
}
/* Random Volume Variation */
if (control.channel[p_track].instrument_ptr->get_volume_random_variation()>0) {
control.channel[p_track].random_volume_variation=100-(cp_random_generate(&control.random_seed) % control.channel[p_track].instrument_ptr->get_volume_random_variation());
} else {
control.channel[p_track].random_volume_variation=100;
}
/* Random Pan Variation */
if ((control.channel[p_track].instrument_ptr->get_pan_random_variation()>0) && (control.channel[p_track].panning!=PAN_SURROUND)){
int aux_pan_modifier;
aux_pan_modifier=(cp_random_generate(&control.random_seed) % (control.channel[p_track].instrument_ptr->get_pan_random_variation() << 2));
if ((cp_random_generate(&control.random_seed) % 2)==1) aux_pan_modifier=0-aux_pan_modifier; /* it's 5am, let me sleep :) */
control.channel[p_track].panning+=aux_pan_modifier;
if (control.channel[p_track].panning<PAN_LEFT) control.channel[p_track].panning=PAN_LEFT;
if (control.channel[p_track].panning>PAN_RIGHT) control.channel[p_track].panning=PAN_RIGHT;
}
/*filter*/
if (control.channel[p_track].instrument_ptr->filter_use_default_cutoff()) {
control.channel[p_track].filter.it_cutoff=control.channel[p_track].instrument_ptr->get_filter_default_cutoff()*2;
}
if (control.channel[p_track].instrument_ptr->filter_use_default_resonance()) {
control.channel[p_track].filter.it_reso=control.channel[p_track].instrument_ptr->get_filter_default_resonance()*2;
}
/*envelopes*/
control.channel[p_track].volume_envelope_on=control.channel[p_track].instrument_ptr->get_volume_envelope()->is_enabled();
control.channel[p_track].panning_envelope_on=control.channel[p_track].instrument_ptr->get_pan_envelope()->is_enabled();
control.channel[p_track].pitch_envelope_on=control.channel[p_track].instrument_ptr->get_pitch_filter_envelope()->is_enabled();
control.channel[p_track].NNA_type=control.channel[p_track].instrument_ptr->get_NNA_type();
control.channel[p_track].duplicate_check_type=control.channel[p_track].instrument_ptr->get_DC_type();
control.channel[p_track].duplicate_check_action=control.channel[p_track].instrument_ptr->get_DC_action();
} else {
control.channel[p_track].NNA_type=CPInstrument::NNA_NOTE_CUT;
control.channel[p_track].duplicate_check_type=CPInstrument::DCT_DISABLED;
control.channel[p_track].duplicate_check_action=CPInstrument::DCA_NOTE_CUT;
}
if (p_instrument<CPSong::MAX_INSTRUMENTS) { // instrument change
control.channel[p_track].volume=control.channel[p_track].aux_volume=aux_sample->get_default_volume();
}
control.channel[p_track].slide_to_period=control.channel[p_track].aux_period=get_period((uint16_t)(control.channel[p_track].note)<<1,CPSampleManager::get_singleton()->get_c5_freq( (aux_sample->get_sample_data())));
control.channel[p_track].note_end_flags=END_NOTE_NOTHING; /* clears flags */
return true;
}
void CPPlayer::process_volume_column(int p_track,uint8_t p_volume) {
control.channel[p_track].current_volume_command=CPNote::EMPTY;
control.channel[p_track].current_volume_parameter=CPNote::EMPTY;
if (p_volume<65) { // VOLUME
control.channel[p_track].aux_volume=p_volume;
} else if (p_volume<125) { // Volume Command
control.channel[p_track].current_volume_command=(p_volume-65) / 10;
control.channel[p_track].current_volume_parameter=(p_volume-65) % 10;
} else if (p_volume<193) { // PAN
control.channel[p_track].channel_panning=(p_volume-128)*PAN_RIGHT/64;
control.channel[p_track].panning=control.channel[p_track].channel_panning;
} else if (p_volume<213) { //More volume Commands
control.channel[p_track].current_volume_command=((p_volume-193) / 10)+6;
control.channel[p_track].current_volume_parameter=(p_volume-193) % 10;
}
}
void CPPlayer::process_note(int p_track,CPNote p_note) {
if ( p_note.note!=CPNote::SCRIPT ) {
process_note_and_instrument(p_track,p_note.note,p_note.instrument);
process_volume_column(p_track,p_note.volume);
control.channel[p_track].current_command=p_note.command;
control.channel[p_track].current_parameter=p_note.parameter;
} else {
CPNote n = song->get_pattern( control.position.current_pattern )->get_transformed_script_note( p_track, control.position.current_row );
process_note( p_track, n );
song->get_pattern( control.position.current_pattern )->scripted_clone( p_track, control.position.current_row );
}
}
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