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MFoP.c
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#ifndef M_PI
#define M_PI 3.1415926535897932384
#endif
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <samplerate.h>
#include <math.h>
#include <portaudio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <ncurses.h>
static uint32_t const PAL_CLOCK = 3546895;
static double const SAMPLE_RATE = 48000;
static double const FINETUNE_BASE = 1.0072382087;
uint16_t periods[] = {
856,808,762,720,678,640,604,570,538,508,480,453,
428,404,381,360,339,320,302,285,269,254,240,226,
214,202,190,180,170,160,151,143,135,127,120,113};
char* notes[] = {
"C-1", "C#1", "D-1", "D#1", "E-1", "F-1",
"F#1", "G-1", "G#1", "A-1", "A#1", "B-1",
"C-2", "C#2", "D-2", "D#2", "E-2", "F-2",
"F#2", "G-2", "G#2", "A-2", "A#2", "B-2",
"C-3", "C#3", "D-3", "D#3", "E-3", "F-3",
"F#3", "G-3", "G#3", "A-3", "A#3", "B-3"};
uint8_t funktable[] = {
0,5,6,7,8,10,11,13,16,19,22,26,32,43,64,128};
WINDOW* patternwin;
//WINDOW* instrwin;
int16_t* waves[3];
int16_t sine[64];
int16_t saw[64];
int16_t square[64];
char* displaypatterns;
//int16_t randwave[64];
off_t filelength;
bool loop;
bool headphones;
float* audiobuf;
float* mixbuf;
int pattern;
int row;
int currow;
int curpattern;
bool addflag; //used for emualting obscure Dxx bug
uint8_t* curdata;
bool done;
int libsrc_error;
PaStream* stream;
PaError pa_error;
uint8_t globaltick;
bool patternset;
uint8_t delcount;
bool delset;
bool inrepeat;
double ticktime;
double nextticktime;
uint8_t nexttempo;
uint8_t nextspeed;
uint8_t numsamples;
uint8_t type;
typedef struct {
char name[23];
uint16_t length;
int8_t finetune;
uint8_t volume;
uint16_t repeatpoint;
uint16_t repeatlength;
int8_t* sampledata;
} sample;
typedef struct{
sample* sample;
int8_t volume;
int8_t tempvolume;
uint32_t index;
float* buffer;
float* resampled;
uint32_t increment;
bool repeat;
bool stop;
uint8_t deltick;
uint16_t period;
uint16_t arp[3];
uint16_t portdest;
uint16_t tempperiod;
uint8_t portstep;
uint8_t cut;
SRC_STATE* converter;
SRC_DATA* cdata;
int8_t retrig;
uint8_t vibspeed;
uint8_t vibwave;
uint8_t vibpos;
uint8_t vibdepth;
uint8_t tremspeed;
uint8_t tremwave;
uint8_t trempos;
uint8_t tremdepth;
uint8_t funkcounter;
uint8_t funkpos;
uint8_t funkspeed;
int8_t looppoint;
int8_t loopcount;
uint16_t offset;
uint16_t offsetmem;
float error;
} channel;
typedef struct{
char name[21];
uint8_t* patterns;
uint8_t songlength;
sample* samples[31];
uint8_t patternlist[128];
uint32_t speed;
uint16_t tempo;
char magicstring[5];
} modfile;
modfile* gm;
channel* gcp;
int findperiod(uint16_t period)
{
if(period > 856 || period < 113) return -1;
uint8_t upper = 35;
uint8_t lower = 0;
uint8_t mid;
while(upper >= lower)
{
mid = (upper+lower)/2;
if(periods[mid] == period) return mid;
else if(periods[mid] > period) lower = mid+1;
else upper = mid-1;
}
return -1;
/*for(int i = 0; i < 36; i++)
if(periods[i] == period) return i;
//printw("PERIOD TABLE LOOKUP ERROR: %d\n", period);
return -1;*/
}
static inline double calcrate(uint16_t period, int8_t finetune)
{
return PAL_CLOCK/
(round((double)period*pow(FINETUNE_BASE, -(double)finetune)));
}
//Currently unused because of funkrepeat
/*void floatncpy(float* dest, int8_t* src, int n)
{
for(int i = 0; i < n; i++)
dest[i] = ((float)src[i])/128.0f;
}*/
void libsrcerror(int err)
{
printw("Lib SRC Error: %s\n", src_strerror(err));
abort();
}
void portaudioerror(int err)
{
printw("PortAudio error: %s\n", Pa_GetErrorText(err));
abort();
}
void precalculatetables()
{
double cursin;
//srand(time(NULL));
waves[0] = sine;
waves[1] = saw;
waves[2] = square;
//waves[3] = randwave;
for(int i = 0; i < 64; i++)
{
cursin = sin(i*2*M_PI/64.0);
sine[i] = 255*cursin;
saw[i] = 255-(8*i);
square[i] = (i<32)?255:-256;
//randwave[i] = (int8_t)(rand()%256);
}
}
channel* initsound()
{
precalculatetables();
pa_error = Pa_Initialize();
if(pa_error != paNoError) portaudioerror(pa_error);
channel* channels = malloc(4*sizeof(channel));
mixbuf = malloc(0.08*2*SAMPLE_RATE*sizeof(float));
//buffs[1] = malloc(0.02*2*SAMPLE_RATE*sizeof(float));
//curbuf = 0;
audiobuf = malloc(0.08*2*SAMPLE_RATE*sizeof(float));
for(int i = 0; i < 4; i++)
{
channels[i].error = 0;
channels[i].volume = 0;
channels[i].tempvolume = 0;
channels[i].deltick = 0;
channels[i].increment = 0.0f;
channels[i].buffer = malloc(PAL_CLOCK*sizeof(float));
//channels[i].output = malloc(1024*sizeof(float));
channels[i].resampled = malloc(0.08*SAMPLE_RATE*sizeof(float));
channels[i].stop = true;
channels[i].repeat = false;
//channels[i].arp = malloc(3*sizeof(uint16_t));
channels[i].period = 0;
channels[i].portdest = 0;
channels[i].tempperiod = 0;
channels[i].portstep = 0;
channels[i].offset = 0;
channels[i].offsetmem = 0;
channels[i].retrig = 0;
channels[i].vibwave = 0;
channels[i].tremwave = 0;
channels[i].vibpos = 0;
channels[i].trempos = 0;
channels[i].funkcounter = 0;
channels[i].funkpos = 0;
channels[i].funkspeed = 0;
channels[i].looppoint = 0;
channels[i].loopcount = -1;
channels[i].sample = NULL;
//channels[i].converter = src_new(SRC_ZERO_ORDER_HOLD, 1, &libsrc_error);
channels[i].converter = src_new(SRC_LINEAR, 1, &libsrc_error);
//channels[i].converter = src_new(SRC_SINC_FASTEST, 1, &libsrc_error);
//channels[i].converter = src_new(SRC_SINC_BEST_QUALITY, 1, &libsrc_error);
channels[i].cdata = malloc(sizeof(SRC_DATA));
channels[i].cdata->data_in = channels[i].buffer;
channels[i].cdata->data_out = channels[i].resampled;
channels[i].cdata->output_frames = SAMPLE_RATE*0.02;
channels[i].cdata->end_of_input = 0;
row = 0;
currow = 0;
pattern = 0;
delset = false;
inrepeat = false;
delcount = 0;
globaltick = 0;
addflag = false;
}
//open the audio stream
pa_error = Pa_OpenDefaultStream(&stream, 0, 2, paFloat32, SAMPLE_RATE,
paFramesPerBufferUnspecified, NULL,
audiobuf);
if(pa_error != paNoError) portaudioerror(pa_error);
return channels;
}
void renderpattern(uint8_t* patterndata)
{
uint16_t period;
uint8_t tempsam;
uint8_t* data;
uint8_t tempeffect;
uint8_t effectdata;
for(int line = 0; line < 64; line++)
{
for(int chan = 0; chan < 4; chan++)
{
data = patterndata+16*line+chan*4;
period = (((uint16_t)((*data)&0x0F))<<8) | (uint16_t)(*(data+1));
tempsam = ((((*data))&0xF0) | ((*(data+2)>>4)&0x0F));
tempeffect = *(data+2)&0x0F;
effectdata = *(data+3);
//tempsam = tempsam;
//if(period) sprintf((displaypatterns+49*line+chan*12), "%03x ", period);
if(period)
{
char* notestr;
int8_t noteid = findperiod(period);
if(noteid == -1) notestr = "???";
else notestr = notes[noteid];
sprintf((displaypatterns+48*line+chan*12), "%s ",
notestr);
}
else sprintf((displaypatterns+48*line+chan*12), " ");
if(tempsam) sprintf((displaypatterns+48*line+chan*12+4),
"%2X ", tempsam);
else sprintf((displaypatterns+48*line+chan*12+4), " ");
if(tempeffect || effectdata)
sprintf((displaypatterns+48*line+chan*12+7), "%03X| ",
((uint16_t)tempeffect<<8)|effectdata);
else sprintf((displaypatterns+48*line+chan*12+7), " | ");
}
//wprintw(patternwin, "%s\n", displaypatterns+line*49);
//wrefresh(patternwin);
//sprintf(displaypatterns, "");
}
return;
}
void preprocesseffects(uint8_t* data)
{
if ((*(data+2)&0x0F) == 0x0F) //set speed/tempo
{
uint8_t effectdata = *(data+3);
//if(effectdata == 0) return;
if(effectdata > 0x1F)
{
gm->tempo = effectdata;
nexttempo = effectdata;
ticktime = 1/(0.4*effectdata);
nextticktime = 1/(0.4*effectdata);
}
else
{
gm->speed = effectdata;
nextspeed = effectdata;
}
}
}
void processnoteeffects(channel* c, uint8_t* data)
{
uint8_t tempeffect = *(data+2)&0x0F;
uint8_t effectdata = *(data+3);
switch(tempeffect)
{
case 0x00: //normal/arpeggio
if(effectdata) c->tempperiod = c->arp[globaltick%3];
break;
case 0x01: //slide up
c->period -= effectdata;
c->tempperiod = c->period;
break;
case 0x02: //slide down
c->period += effectdata;
c->tempperiod = c->period;
break;
case 0x05: //tone portamento + volume slide
//slide up
if(effectdata&0xF0) c->volume += ((effectdata>>4) & 0x0F);
//slide down
else c->volume -= effectdata;
c->tempvolume = c->volume;
//exploit fallthrough
case 0x03: //tone portamento
if(abs(c->portdest - c->period) < c->portstep)
c->period = c->portdest;
else if(c->portdest > c->period)
c->period += c->portstep;
else
c->period -= c->portstep;
c->tempperiod = c->period;
break;
case 0x06: //vibrato + volume slide
//slide up
if(effectdata&0xF0) c->volume += ((effectdata>>4) & 0x0F);
//slide down
else c->volume -= effectdata;
c->tempvolume = c->volume;
//exploit fallthrough
case 0x04: //vibrato
c->tempperiod = c->period +
((c->vibdepth*waves[c->vibwave&3][c->vibpos])>>7);
c->vibpos += c->vibspeed;
c->vibpos %= 64;
//printw("%d %d\n", c->period, c->tempperiod);
break;
case 0x07: //tremolo
c->tempvolume = c->volume +
((c->tremdepth*waves[c->tremwave&3][c->trempos])>>6);
c->trempos += c->tremspeed;
//c->trempos += 1;
c->trempos %= 64;
break;
case 0x0A: //volume slide
//slide up
if(effectdata&0xF0) c->volume += ((effectdata>>4) & 0x0F);
//slide down
else c->volume -= effectdata;
c->tempvolume = c->volume;
break;
case 0x0E: //E commands
{
switch(effectdata & 0xF0)
{
case 0x00: //set filter (0 on, 1 off)
break;
case 0x30: //glissando control (0 off, 1 on, use with tone portamento)
break;
case 0x40: //set vibrato waveform (0 sine, 1 ramp down, 2 square)
c->vibwave = effectdata & 0x0F;
break;
case 0x50: //set finetune
{
int8_t tempfinetune = effectdata & 0x0F;
if(tempfinetune > 0x07) tempfinetune |= 0xF0;
c->sample->finetune = tempfinetune;
break;
}
case 0x70: //set tremolo waveform (0 sine, 1 ramp down, 2 square)
c->tremwave = effectdata & 0x0F;
break;
//There's no effect 0xE8 (is 8 evil or something?)
case 0x90: //retrigger note + x vblanks (ticks)
if(((effectdata&0x0F) == 0) ||
(globaltick % (effectdata&0x0F)) == 0) c->index = c->offset;
break;
case 0xC0: //cut from note + x vblanks
if(globaltick == (effectdata&0x0F)) c->volume = 0;
break;
}
break;
}
case 0x0F:
if(effectdata == 0)
{
done = true;
break;
}
if(effectdata > 0x1F)
{
nexttempo = effectdata;
nextticktime = 1/(0.4*effectdata);
}
else nextspeed = effectdata;
break;
default:
break;
}
}
void processnote(channel* c, uint8_t* data, uint8_t offset,
bool overwrite)
{
uint8_t tempeffect = *(data+2)&0x0F;
uint8_t effectdata = *(data+3);
if(globaltick == 0 && tempeffect == 0x0E && (effectdata&0xF0) == 0xD0)
c->deltick = (effectdata&0x0F)%gm->speed;
if(globaltick == c->deltick)
{
uint16_t period = (((uint16_t)((*data)&0x0F))<<8) | (uint16_t)(*(data+1));
uint8_t tempsam = ((((*data))&0xF0) | ((*(data+2)>>4)&0x0F));
//if(period) printw("%03x", period);
//else printw(" ");
if((period || tempsam) && !inrepeat)
{
if(tempsam)
{
/*if (c->sample != gm->samples[tempsam])
{
c->funkpos = 0;
}*/
//printw("%2x ", tempsam);
c->error = 0;
c->stop = false;
tempsam--;
if(tempeffect != 0x03 && tempeffect != 0x05) c->offset = 0;
//sample* prevsam = c->sample;
c->sample = gm->samples[tempsam];
c->volume = c->sample->volume;
c->tempvolume = c->volume;
}
//else printw("00 ");
//printw("FINETUNE: %f\n", (double)(c->sample->finetune));
if(period)
{
if(tempeffect != 0x03 && tempeffect != 0x05)
{
if(tempeffect == 0x09)
{
if(effectdata) c->offsetmem = effectdata * 0x100;
c->offset += c->offsetmem;
}
c->period = period;
c->tempperiod = period;
c->index = c->offset;
c->stop = false;
c->repeat = false;
c->vibpos = 0;
c->trempos = 0;
c->error = 0;
}
c->portdest = period;
//c->arp[0] = c->period;
}
}
//if(tempeffect || effectdata) printw("%1x %02x ", tempeffect, effectdata);
//else printw(" ");
switch(tempeffect)
{
case 0x00:
if(effectdata)
{
c->period = c->portdest;
int base = findperiod(c->period);
if(base == -1)
{
c->arp[0] = c->period;
c->arp[1] = c->period;
c->arp[2] = c->period;
break;
}
uint8_t step1 = base+((effectdata>>4)&0x0F);
uint8_t step2 = base+(effectdata&0x0F);
c->arp[0] = c->period;
if(step1 > 35)
{
if(step1 == 36) c->arp[1] = 0;
else c->arp[1] = periods[(step1-1)%36];
}
else c->arp[1] = periods[step1];
if(step2 > 35)
{
if(step2 == 36) c->arp[2] = 0;
else c->arp[2] = periods[(step2-1)%36];
}
else c->arp[2] = periods[step2];
}
break;
case 0x03:
if(effectdata) c->portstep = effectdata;
break;
case 0x04: //vibrato
if(effectdata & 0x0F) c->vibdepth = effectdata & 0x0F;
if(effectdata & 0xF0) c->vibspeed = (effectdata >> 4) & 0x0F;
break;
case 0x07: //tremolo
if(effectdata)
{
c->tremdepth = effectdata & 0x0F;
c->tremspeed = (effectdata >> 4) & 0x0F;
}
break;
case 0x0B: //position jump
if(currow == row) row = 0;
pattern = effectdata;
patternset = true;
break;
case 0x0C: //set volume
if(effectdata > 64) c->volume = 64;
else c->volume = effectdata;
c->tempvolume = c->volume;
break;
case 0x0D: //row jump
if(delcount) break;
if(!patternset)
pattern++;
if(pattern >= gm->songlength) pattern = 0;
row = (effectdata>>4)*10+(effectdata&0x0F);
patternset = true;
if(addflag) row++; //emulate protracker EEx + Dxx bug
break;
case 0x0E:
{
switch(effectdata&0xF0)
{
case 0x10:
c->period -= effectdata&0x0F;
c->tempperiod = c->period;
break;
case 0x20:
c->period += effectdata&0x0F;
c->tempperiod = c->period;
break;
case 0x60: //jump to loop, play x times
if(!(effectdata & 0x0F)) c->looppoint = row;
else if(effectdata & 0x0F)
{
if(c->loopcount == -1)
{
c->loopcount = (effectdata & 0x0F);
row = c->looppoint;
}
else if(c->loopcount) row = c->looppoint;
c->loopcount--;
}
break;
case 0xA0:
c->volume += (effectdata&0x0F);
c->tempvolume = c->volume;
break;
case 0xB0:
c->volume -= (effectdata&0x0F);
c->tempvolume = c->volume;
break;
case 0xC0:
c->cut = effectdata&0x0F;
break;
case 0xE0: //delay pattern x notes
if(!delset) delcount = effectdata&0x0F;
delset = true;
/*emulate bug that causes protracker to cause Dxx to jump
too far when used in conjunction with EEx*/
addflag = true;
break;
case 0xF0:
c->funkspeed = funktable[effectdata&0x0F];
break;
default:
break;
}
}
default:
break;
}
if(c->tempperiod == 0 || c->sample == NULL || c->sample->length == 0)
c->stop = true;
}
else if (c->deltick == 0) processnoteeffects(c, data);
if(c->retrig && globaltick == c->retrig-1)
{
c->index = 0;
c->stop = false;
c->repeat = false;
}
double conv_ratio;
//RESAMPLE PER TICK
int writesize = SAMPLE_RATE*ticktime;
if(c->volume < 0) c->volume = 0;
else if(c->volume > 64) c->volume = 64;
if(c->tempvolume < 0) c->tempvolume = 0;
else if(c->tempvolume > 64) c->tempvolume = 64;
if(c->tempperiod > 856) c->tempperiod = 856;
else if(c->tempperiod < 113) c->tempperiod = 113;
//write empty frame
c->cdata->output_frames = ticktime*SAMPLE_RATE;
if(c->stop)
{
conv_ratio = 1.0;
c->cdata->src_ratio = conv_ratio;
libsrc_error = src_set_ratio(c->converter, conv_ratio);
if(libsrc_error) libsrcerror(libsrc_error);
c->cdata->input_frames = ticktime*SAMPLE_RATE;
//c->rate = SAMPLE_RATE;
for(int i = 0; i < ticktime*SAMPLE_RATE; i++)
c->buffer[i] = 0.0f;
}
//write non-empty frame to buffer to be interpolated
else
{
double rate = calcrate(c->tempperiod, c->sample->finetune);
conv_ratio = SAMPLE_RATE/rate;
c->cdata->src_ratio = conv_ratio;
libsrc_error = src_set_ratio(c->converter, conv_ratio);
if(libsrc_error) libsrcerror(libsrc_error);
c->cdata->input_frames = ticktime*rate;
c->funkcounter += c->funkspeed;
if(c->funkcounter >= 128)
{
c->funkcounter = 0;
c->sample->sampledata[c->sample->repeatpoint*2+c->funkpos] ^= 0xFF;
c->funkpos = (c->funkpos+1) % (c->sample->repeatlength*2);
}
for(int i = 0; i < ticktime*rate-1; i++)
{
c->buffer[i] = (float)c->sample->sampledata[c->index++]/128.0f
* c->tempvolume/64.0 * 0.4f;
if(c->repeat && (c->index >= (c->sample->repeatlength)*2
+ (c->sample->repeatpoint)*2))
{
c->index = c->sample->repeatpoint*2;
}
else if(c->index >= (c->sample->length)*2)
{
if(c->sample->repeatlength > 1)
{
c->index = c->sample->repeatpoint*2;
c->repeat = true;
}
else
{
//float last = c->buffer[i];
for(int j = i+1; j < ticktime*rate-1; j++)
c->buffer[j] = 0;
c->stop = true;
break;
}
//c->index = restore;
}
}
//add fractional part of rate calculation to account for error
/*c->error += rate*ticktime - (uint32_t)(rate*ticktime);
c->index += c->error;
c->error -= (uint32_t)(c->error);*/
}
libsrc_error = src_process(c->converter, c->cdata);
if(libsrc_error) libsrcerror(libsrc_error);
if(c->cdata->output_frames_gen != c->cdata->output_frames)
{
for(int k = c->cdata->output_frames_gen; k < c->cdata->output_frames; k++)
{
c->resampled[k] =
c->resampled[c->cdata->output_frames_gen-1];
}
}
//WRITE TO MIXING BUFFER
if(overwrite)
{
for(int i = 0; i < writesize; i++)
{
audiobuf[i*2+offset] = c->resampled[i];
}
}
else
{
for(int i = 0; i < writesize; i++)
{
audiobuf[i*2+offset] += c->resampled[i];
}
}
if(globaltick == gm->speed - 1)
{
c->tempperiod = c->period;
//c->tempvolume = c->volume;
c->deltick = 0;
}
}
void sampleparse(modfile* m, uint8_t* filearr, uint32_t start)
{
for(int i = 0; i < numsamples; i++)
{
sample* s = malloc(sizeof(sample));
m->samples[i] = s;
strncpy(s->name, (char*)filearr+20+(30*i), 22);
s->name[22] = '\x00';
s->length = (uint16_t)*(filearr+42+(30*i)) << 8;
s->length |= (uint16_t)*(filearr+43+(30*i));
for(int j = 0; j < 22; j++)
{
if(!s->name[j]) break;
if(s->name[j] < 32) s->name[j] = 32;
}
if(i+5 < LINES)
{
if(s->name[0]) mvprintw(i+5, 52, "%02X %s", i+1, s->name);
else mvprintw(i+5, 52, "%02X", i+1);
}
//printw("length: %d\n", s->length);
if (s->length != 0)
{
int8_t tempfinetune = filearr[44 + 30 * i]&0x0F;
if(tempfinetune > 0x07) tempfinetune |= 0xF0;
s->finetune = tempfinetune;
s->volume = filearr[45 + 30 * i];
s->repeatpoint = (uint16_t)*(filearr+46+(30*i)) << 8;
s->repeatpoint |= (uint16_t)*(filearr+47+(30*i));
s->repeatlength = (uint16_t)*(filearr+48+(30*i)) << 8;
s->repeatlength |= (uint16_t)*(filearr+49+(30*i));
int copylen = (s->length)*2;
//s->sampledata = malloc(copylen*sizeof(float));
s->sampledata = malloc(copylen*sizeof(int8_t));
if ((start + copylen) > filelength) abort();
//floatncpy(s->sampledata, (int8_t*)(filearr+start), copylen);
memcpy(s->sampledata, (int8_t*)(filearr+start), copylen);
start += copylen;
}
}
return;
}
void steptick(channel* cp)
{
if(row == 64)
{
row = 0;
if(pattern == curpattern) pattern++;
/*if(pattern < gm->songlength)
renderpattern(gm->patterns + 1024*gm->patternlist[pattern]);*/
}
if(pattern >= gm->songlength)
{
if(loop)
{
pattern = 0;
row = 0;
globaltick = 0;
gm->speed = 6;
nextspeed = 6;
gm->tempo = 125;
nexttempo = 125;
ticktime = 0.02;
nextticktime = 0.02;
/*renderpattern(gm->patterns + 1024*gm->patternlist[pattern]);*/
}
else
{
done = true;
return;
}
}
if(globaltick == 0)
{
attron(COLOR_PAIR(3));
mvprintw(4, 0, "position: 0x%02X pattern: 0x%02X row: 0x%02X speed: 0x%02X tempo: %d\n",
pattern, gm->patternlist[pattern], row, gm->speed, gm->tempo);
if(pattern != curpattern)
renderpattern(gm->patterns + 1024*gm->patternlist[pattern]);
for(int line = -6; line < 12; line++)
{
if(line == 0)
{
wattron(patternwin, A_REVERSE);
mvwprintw(patternwin, 7+line, 1, " %s", displaypatterns+(row+line)*48);
wattroff(patternwin, A_REVERSE);
}
else if(row+line < 64 && row+line >= 0)
mvwprintw(patternwin, 7+line, 1, " %s", displaypatterns+(row+line)*48);
else
mvwaddstr(patternwin, 7+line, 1, " | | | ");
}
box(patternwin, 0, 0);
wrefresh(patternwin);
refresh();
patternset = false;
curdata = gm->patterns + ((gm->patternlist[pattern])*1024) + (16*row);
currow = row;
curpattern = pattern;
preprocesseffects(curdata);
preprocesseffects(curdata + 4);
preprocesseffects(curdata + 8);
preprocesseffects(curdata + 12);
gm->speed = nextspeed;
gm->tempo = nexttempo;
ticktime = nextticktime;
attroff(COLOR_PAIR(3));
}
processnote(&cp[0], curdata, 0, true);
processnote(&cp[1], curdata + 4, 1, true);
processnote(&cp[2], curdata + 8, 1, false);
processnote(&cp[3], curdata + 12, 0, false);
globaltick++;
if(globaltick == gm->speed)
{
if(delcount)
{
inrepeat = true;
delcount--;
}
else
{
delset = false;
addflag = false;
inrepeat = false;
if(currow == row) row++;
}
globaltick = 0;
}
}
modfile* modparse(FILE* f)
{
uint8_t* filearr = malloc(filelength*sizeof(uint8_t));
int seek = 0;
int c;
while((c = fgetc(f)) != EOF)
filearr[seek++] = (uint8_t)c;
modfile* m = malloc(sizeof(modfile));
strncpy((char*)m->name, (char*)filearr, 20);
m->name[20] = '\x00';
//printw("%s\n", m->name);
memcpy(m->magicstring, filearr+1080, 4);
m->magicstring[4] = '\x00';
if(strcmp(m->magicstring, "M.K.") && strcmp(m->magicstring, "4CHN"))
{
printw("Warning: Not a 31 instrument 4 channel MOD file. May not be playable.\n");
type = 1;
}
else type = 0;
numsamples = type?15:31;
//printw("magic string%s\n", m->magicstring);
if (type == 0) m->songlength = filearr[950];
else m->songlength = filearr[470];
//printw("songlength: %d\n", m->songlength);
if (type == 0) memcpy(m->patternlist, filearr+952, 128);
else memcpy(m->patternlist, filearr+472, 128);
/*printw("patterns:\n");
for(int i = 0; i < m->songlength; i++)
{
printw("%d\n", m->patternlist[i]);
}*/
int max = 0;
for(int i = 0; i < 128; i++)
{
if(m->patternlist[i] > max) max = m->patternlist[i];
}
//printw("max: %d\n", max);
uint32_t len = (uint32_t)(1024*(max+1)); //1024 = size of pattern
m->patterns = malloc(len);
uint16_t size;
if(type == 0) size = 1084;
else size = 600;
memcpy(m->patterns, filearr+size, len);
sampleparse(m, filearr, len+size);
m->speed = 6; //default speed = 6
nextspeed = 6;
m->tempo = 125;
nexttempo = 125;
ticktime = 0.02;
nextticktime = 0.02;
//printw("secsperrow: %f\n", m->secsperrow);
free(filearr);
return m;
}
char* filename;
int main(int argc, char *argv[])
{
if(argc < 2) goto fileerror;
headphones = false;
for(int i = 1; i < argc; i++)
{
switch(*argv[i])
{
case '-':
switch(*(argv[i]+1))
{
case 'h':
headphones = true;
break;
case 'l':
loop = true;
break;
}
break;
default:
filename = argv[i];