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/* ==================================================
* LV2 port of the famous mda Piano VSTi
* ==================================================
*
* Port
* Author: Ricardo Wurmus (rekado)
* Based on: mda-vst-src-2010-02-14.zip
*
* mda Piano v1.0
* Copyright(c)1999-2000 Paul Kellett (maxim digital audio)
* Based on VST2 SDK (c)1996-1999 Steinberg Soft und Hardware GmbH, All Rights Reserved
*
* ==================================================
*/
#include "mdaPianoCommon.h"
#include "mdaPiano.h"
#include <cstdlib> //for exit
#include <stdio.h>
#include <math.h>
#define STRING_BUF 2048
static const char* sample_file = "samples.raw";
mdaPiano::mdaPiano(double rate)
: LV2::Synth<mdaPianoVoice, mdaPiano>(p_n_ports, p_midi) {
load_samples(&waves);
load_kgrp(kgrp);
for(uint32_t i=0; i<NVOICES; ++i) {
voices[i] = new mdaPianoVoice(rate, waves, kgrp);
add_voices(voices[i]);
}
sustain = 0;
update();
}
//parameter change
void mdaPiano::update() {
for (uint32_t v=0; v<NVOICES; ++v) {
voices[v]->update(Current);
}
}
unsigned mdaPiano::find_free_voice(unsigned char key, unsigned char velocity) {
//is this a retriggered note during sustain?
if (sustain) {
for (unsigned i = 0; i < NVOICES; ++i) {
if ((voices[i]->get_key() == key) && (voices[i]->is_sustained())) {
return i;
}
}
}
//take the next free voice if
// ... notes are sustained but not this new one
// ... notes are not sustained
for (unsigned i = 0; i < NVOICES; ++i) {
if (voices[i]->get_key() == LV2::INVALID_KEY)
{
return i;
}
}
//TODO: steal quietest note if all voices are used up
return 0;
}
void mdaPiano::setVolume(float value)
{
for (uint32_t v=0; v<NVOICES; ++v)
voices[v]->set_volume(value);
}
void mdaPiano::setParameter(unsigned char id, float value)
{
if(id>=NPARAMS)
return;
*p(id+PARAM_OFFSET) = value;
update();
#ifdef DEBUG
printf("changed %i to %f\n", id, value);
#endif
}
void mdaPiano::handle_midi(uint32_t size, unsigned char* data) {
#ifdef DEBUG
printf("%d\n", data[1]);
#endif
//discard invalid midi messages
if (size != 3)
return;
//receive on all channels
switch(data[0] & 0xf0)
{
case 0x80: //note off
for (unsigned i = 0; i < NVOICES; ++i) {
if (voices[i]->get_key() == data[1]) {
voices[i]->release(data[2]);
break;
}
}
break;
case 0x90: //note on
{
unsigned int v = find_free_voice(data[1], data[2]);
if (v < NVOICES) {
voices[v]->on(data[1], data[2]);
}
break;
}
case 0xB0: //controller
switch(data[1])
{
case 0x01: //mod wheel
case 0x43: //soft pedal
{
float muff = 0.01f * (float)((127 - data[2]) * (127 - data[2]));
for (unsigned i = 0; i < NVOICES; ++i) {
voices[i]->set_muff(muff);
}
break;
}
case 0x07: //volume
setVolume(0.00002f * (float)(data[2] * data[2]));
break;
case 0x40: //sustain pedal
case 0x42: //sustenuto pedal
sustain = data[2] & 0x40;
for (unsigned i = 0; i < NVOICES; ++i) {
voices[i]->set_sustain(sustain);
//if pedal was released: dampen sustained notes
if((sustain==0) && (voices[i]->is_sustained())) {
voices[i]->release(0);
}
}
break;
//all sound off
case 0x78:
//all notes off
case 0x7b:
default:
for(short v=0; v<NVOICES; v++) {
voices[v]->reset();
}
break;
}
break;
default: break;
}
}
// TODO: load this from a file
void mdaPiano::load_kgrp(KGRP *kgrp)
{
//Waveform data and keymapping is hard-wired in *this* version
kgrp[ 0].root = 36; kgrp[ 0].high = 37; kgrp[ 0].pos = 0; kgrp[ 0].end = 36275; kgrp[ 0].loop = 14774;
kgrp[ 1].root = 40; kgrp[ 1].high = 41; kgrp[ 1].pos = 36278; kgrp[ 1].end = 83135; kgrp[ 1].loop = 16268;
kgrp[ 2].root = 43; kgrp[ 2].high = 45; kgrp[ 2].pos = 83137; kgrp[ 2].end = 146756; kgrp[ 2].loop = 33541;
kgrp[ 3].root = 48; kgrp[ 3].high = 49; kgrp[ 3].pos = 146758; kgrp[ 3].end = 204997; kgrp[ 3].loop = 21156;
kgrp[ 4].root = 52; kgrp[ 4].high = 53; kgrp[ 4].pos = 204999; kgrp[ 4].end = 244908; kgrp[ 4].loop = 17191;
kgrp[ 5].root = 55; kgrp[ 5].high = 57; kgrp[ 5].pos = 244910; kgrp[ 5].end = 290978; kgrp[ 5].loop = 23286;
kgrp[ 6].root = 60; kgrp[ 6].high = 61; kgrp[ 6].pos = 290980; kgrp[ 6].end = 342948; kgrp[ 6].loop = 18002;
kgrp[ 7].root = 64; kgrp[ 7].high = 65; kgrp[ 7].pos = 342950; kgrp[ 7].end = 391750; kgrp[ 7].loop = 19746;
kgrp[ 8].root = 67; kgrp[ 8].high = 69; kgrp[ 8].pos = 391752; kgrp[ 8].end = 436915; kgrp[ 8].loop = 22253;
kgrp[ 9].root = 72; kgrp[ 9].high = 73; kgrp[ 9].pos = 436917; kgrp[ 9].end = 468807; kgrp[ 9].loop = 8852;
kgrp[10].root = 76; kgrp[10].high = 77; kgrp[10].pos = 468809; kgrp[10].end = 492772; kgrp[10].loop = 9693;
kgrp[11].root = 79; kgrp[11].high = 81; kgrp[11].pos = 492774; kgrp[11].end = 532293; kgrp[11].loop = 10596;
kgrp[12].root = 84; kgrp[12].high = 85; kgrp[12].pos = 532295; kgrp[12].end = 560192; kgrp[12].loop = 6011;
kgrp[13].root = 88; kgrp[13].high = 89; kgrp[13].pos = 560194; kgrp[13].end = 574121; kgrp[13].loop = 3414;
kgrp[14].root = 93; kgrp[14].high = 999; kgrp[14].pos = 574123; kgrp[14].end = 586343; kgrp[14].loop = 2399;
}
void mdaPiano::load_samples(short **buffer)
{
FILE *f;
long num, size;
char filepath[STRING_BUF];
strncpy(filepath, bundle_path(), STRING_BUF);
strncat(filepath,
sample_file,
STRING_BUF - strlen(filepath));
f = fopen(filepath, "rb");
if (f == NULL) {
fputs("File error", stderr);
exit(1);
}
// obtain file size
fseek(f, 0, SEEK_END);
size = ftell(f);
rewind(f);
// allocate memory to contain the whole file
*buffer = (short*) malloc (sizeof(short)*size);
if (*buffer == NULL) {
fputs("Memory error", stderr);
exit(2);
}
// copy the file into the buffer
num = fread(*buffer, 1, size, f);
if (num != size) {
fputs ("Reading error", stderr);
exit (3);
}
fclose (f);
return;
}
static int _ = mdaPiano::register_class(p_uri);
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