ref: 396caa4d31859045ccb5ef943fd430ca4026cce8
dir: /src/it/read669.c/
/* _______ ____ __ ___ ___
* \ _ \ \ / \ / \ \ / / ' ' '
* | | \ \ | | || | \/ | . .
* | | | | | | || ||\ /| |
* | | | | | | || || \/ | | ' ' '
* | | | | | | || || | | . .
* | |_/ / \ \__// || | |
* /_______/ynamic \____/niversal /__\ /____\usic /| . . ibliotheque
* / \
* / . \
* read669.c - Code to read a 669 Composer module / / \ \
* from an open file. | < / \_
* | \/ /\ /
* By Christopher Snowhill. \_ / > /
* | \ / /
* | ' /
* \__/
*/
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "dumb.h"
#include "internal/it.h"
static int it_669_read_pattern(IT_PATTERN *pattern, DUMBFILE *f, int tempo,
int breakpoint, unsigned char *buffer,
int *used_channels) {
int pos;
int channel;
int row;
IT_ENTRY *entry;
pattern->n_rows = 64;
if (dumbfile_getnc((char *)buffer, 64 * 3 * 8, f) < 64 * 3 * 8)
return -1;
/* compute number of entries */
pattern->n_entries =
64 + 1; /* Account for the row end markers, speed command */
if (breakpoint < 63)
pattern->n_entries++; /* and break to row 0 */
pos = 0;
for (row = 0; row < 64; row++) {
for (channel = 0; channel < 8; channel++) {
if (buffer[pos + 0] != 0xFF || buffer[pos + 2] != 0xFF)
pattern->n_entries++;
pos += 3;
}
}
pattern->entry = malloc(pattern->n_entries * sizeof(*pattern->entry));
if (!pattern->entry)
return -1;
if (breakpoint == 63)
breakpoint++;
entry = pattern->entry;
entry->channel = 8;
entry->mask = IT_ENTRY_EFFECT;
entry->effect = IT_SET_SPEED;
entry->effectvalue = tempo;
entry++;
pos = 0;
for (row = 0; row < 64; row++) {
if (row == breakpoint) {
entry->channel = 8;
entry->mask = IT_ENTRY_EFFECT;
entry->effect = IT_BREAK_TO_ROW;
entry->effectvalue = 0;
entry++;
}
for (channel = 0; channel < 8; channel++) {
if (buffer[pos + 0] != 0xFF || buffer[pos + 2] != 0xFF) {
entry->channel = channel;
entry->mask = 0;
if (buffer[pos + 0] < 0xFE) {
entry->mask |= IT_ENTRY_NOTE | IT_ENTRY_INSTRUMENT;
entry->note = (buffer[pos + 0] >> 2) + 36;
entry->instrument =
(((buffer[pos + 0] << 4) | (buffer[pos + 1] >> 4)) &
0x3F) +
1;
}
if (buffer[pos + 0] <= 0xFE) {
entry->mask |= IT_ENTRY_VOLPAN;
entry->volpan = ((buffer[pos + 1] & 15) << 6) / 15;
if (*used_channels < channel + 1)
*used_channels = channel + 1;
}
if (buffer[pos + 2] != 0xFF) {
entry->mask |= IT_ENTRY_EFFECT;
entry->effectvalue = buffer[pos + 2] & 15;
switch (buffer[pos + 2] >> 4) {
case 0:
entry->effect = IT_PORTAMENTO_UP;
break;
case 1:
entry->effect = IT_PORTAMENTO_DOWN;
break;
case 2:
entry->effect = IT_TONE_PORTAMENTO;
break;
case 3:
entry->effect = IT_S;
entry->effectvalue += IT_S_FINETUNE * 16 + 8;
break;
case 4:
entry->effect = IT_VIBRATO;
// XXX speed unknown
entry->effectvalue |= 0x10;
break;
case 5:
if (entry->effectvalue) {
entry->effect = IT_SET_SPEED;
} else {
entry->mask &= ~IT_ENTRY_EFFECT;
}
break;
#if 0
/* dunno about this, really... */
case 6:
if (entry->effectvalue == 0) {
entry->effect = IT_PANNING_SLIDE;
entry->effectvalue = 0xFE;
} else if (entry->effectvalue == 1) {
entry->effect = IT_PANNING_SLIDE;
entry->effectvalue = 0xEF;
} else {
entry->mask &= ~IT_ENTRY_EFFECT;
}
break;
#endif
default:
entry->mask &= ~IT_ENTRY_EFFECT;
break;
}
if (*used_channels < channel + 1)
*used_channels = channel + 1;
}
entry++;
}
pos += 3;
}
IT_SET_END_ROW(entry);
entry++;
}
return 0;
}
static int it_669_read_sample_header(IT_SAMPLE *sample, DUMBFILE *f) {
dumbfile_getnc((char *)sample->name, 13, f);
sample->name[13] = 0;
sample->filename[0] = 0;
sample->length = dumbfile_igetl(f);
sample->loop_start = dumbfile_igetl(f);
sample->loop_end = dumbfile_igetl(f);
if (dumbfile_error(f))
return -1;
if (sample->length <= 0) {
sample->flags = 0;
return 0;
}
sample->flags = IT_SAMPLE_EXISTS;
sample->global_volume = 64;
sample->default_volume = 64;
sample->default_pan = 0;
sample->C5_speed = 8363;
// the above line might be wrong
if ((sample->loop_end > sample->length) && !(sample->loop_start))
sample->loop_end = 0;
if (sample->loop_end > sample->length)
sample->loop_end = sample->length;
if (sample->loop_end - sample->loop_start > 2)
sample->flags |= IT_SAMPLE_LOOP;
sample->vibrato_speed = 0;
sample->vibrato_depth = 0;
sample->vibrato_rate = 0;
sample->vibrato_waveform = 0; // do we have to set _all_ these?
sample->finetune = 0;
sample->max_resampling_quality = -1;
return 0;
}
static int it_669_read_sample_data(IT_SAMPLE *sample, DUMBFILE *f) {
long i;
long truncated_size;
/* let's get rid of the sample data coming after the end of the loop */
if ((sample->flags & IT_SAMPLE_LOOP) && sample->loop_end < sample->length) {
truncated_size = sample->length - sample->loop_end;
sample->length = sample->loop_end;
} else {
truncated_size = 0;
}
sample->data = malloc(sample->length);
if (!sample->data)
return -1;
if (sample->length) {
i = dumbfile_getnc(sample->data, sample->length, f);
if (i < sample->length) {
// return -1;
// ficking truncated files
if (i <= 0) {
sample->flags = 0;
return 0;
}
sample->length = i;
if (sample->loop_end > i)
sample->loop_end = i;
} else {
/* skip truncated data */
dumbfile_skip(f, truncated_size);
// Should we be truncating it?
if (dumbfile_error(f))
return -1;
}
for (i = 0; i < sample->length; i++)
((signed char *)sample->data)[i] ^= 0x80;
}
return 0;
}
static DUMB_IT_SIGDATA *it_669_load_sigdata(DUMBFILE *f, int *ext) {
DUMB_IT_SIGDATA *sigdata;
int n_channels;
int i;
unsigned char tempolist[128];
unsigned char breaklist[128];
i = dumbfile_igetw(f);
if (i != 0x6669 && i != 0x4E4A)
return NULL;
*ext = (i == 0x4E4A);
sigdata = malloc(sizeof(*sigdata));
if (!sigdata) {
return NULL;
}
if (dumbfile_getnc((char *)sigdata->name, 36, f) < 36) {
free(sigdata);
return NULL;
}
sigdata->name[36] = 0;
sigdata->order = NULL;
sigdata->instrument = NULL;
sigdata->pattern = NULL;
sigdata->midi = NULL;
sigdata->checkpoint = NULL;
sigdata->sample = NULL;
sigdata->n_instruments = 0;
sigdata->song_message = malloc(72 + 2 + 1);
if (!sigdata->song_message) {
free(sigdata);
return NULL;
}
if (dumbfile_getnc((char *)sigdata->song_message, 36, f) < 36) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
sigdata->song_message[36] = 13;
sigdata->song_message[36 + 1] = 10;
if (dumbfile_getnc((char *)sigdata->song_message + 38, 36, f) < 36) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
sigdata->song_message[38 + 36] = 0;
sigdata->n_samples = dumbfile_getc(f);
sigdata->n_patterns = dumbfile_getc(f);
sigdata->restart_position = dumbfile_getc(f);
if ((sigdata->n_samples) > 64 || (sigdata->n_patterns > 128)) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
sigdata->order = malloc(128); /* We may need to scan the extra ones! */
if (!sigdata->order) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
if (dumbfile_getnc((char *)sigdata->order, 128, f) < 128) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
for (i = 0; i < 128; i++) {
if (sigdata->order[i] == 255)
break;
if (sigdata->order[i] >= sigdata->n_patterns) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
}
if (!i) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
sigdata->n_orders = i;
if (dumbfile_getnc((char *)tempolist, 128, f) < 128) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
if (dumbfile_getnc((char *)breaklist, 128, f) < 128) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
sigdata->sample = malloc(sigdata->n_samples * sizeof(*sigdata->sample));
if (!sigdata->sample) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
for (i = 0; i < sigdata->n_samples; i++)
sigdata->sample[i].data = NULL;
for (i = 0; i < sigdata->n_samples; i++) {
if (it_669_read_sample_header(&sigdata->sample[i], f)) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
}
/* May as well try to save a tiny bit of memory. */
if (sigdata->n_orders < 128) {
unsigned char *order = realloc(sigdata->order, sigdata->n_orders);
if (order)
sigdata->order = order;
}
sigdata->pattern = malloc(sigdata->n_patterns * sizeof(*sigdata->pattern));
if (!sigdata->pattern) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
for (i = 0; i < sigdata->n_patterns; i++)
sigdata->pattern[i].entry = NULL;
n_channels = 0;
/* Read in the patterns */
{
unsigned char *buffer =
malloc(64 * 3 * 8); /* 64 rows * 3 bytes * 8 channels */
if (!buffer) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
for (i = 0; i < sigdata->n_patterns; i++) {
if (it_669_read_pattern(&sigdata->pattern[i], f, tempolist[i],
breaklist[i], buffer, &n_channels) != 0) {
free(buffer);
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
}
free(buffer);
}
sigdata->n_pchannels = n_channels;
/* And finally, the sample data */
for (i = 0; i < sigdata->n_samples; i++) {
if (it_669_read_sample_data(&sigdata->sample[i], f)) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
}
/* Now let's initialise the remaining variables, and we're done! */
sigdata->flags =
IT_OLD_EFFECTS | IT_LINEAR_SLIDES | IT_STEREO | IT_WAS_A_669;
sigdata->global_volume = 128;
sigdata->mixing_volume = 48;
sigdata->speed = 4;
sigdata->tempo = 78;
sigdata->pan_separation = 128;
memset(sigdata->channel_volume, 64, DUMB_IT_N_CHANNELS);
for (i = 0; i < DUMB_IT_N_CHANNELS; i += 2) {
int sep = 32 * dumb_it_default_panning_separation / 100;
sigdata->channel_pan[i + 0] = 32 + sep;
sigdata->channel_pan[i + 1] = 32 - sep;
}
if (_dumb_it_fix_invalid_orders(sigdata) < 0) {
_dumb_it_unload_sigdata(sigdata);
return NULL;
}
return sigdata;
}
DUH *dumb_read_669_quick(DUMBFILE *f) {
sigdata_t *sigdata;
int ext;
DUH_SIGTYPE_DESC *descptr = &_dumb_sigtype_it;
sigdata = it_669_load_sigdata(f, &ext);
if (!sigdata)
return NULL;
{
const char *tag[2][2];
tag[0][0] = "TITLE";
tag[0][1] = (const char *)(((DUMB_IT_SIGDATA *)sigdata)->name);
tag[1][0] = "FORMAT";
tag[1][1] = ext ? "669 Extended" : "669";
return make_duh(-1, 2, (const char *const(*)[2])tag, 1, &descptr,
&sigdata);
}
}