static int it_asy_read_sample_header(IT_SAMPLE *sample, DUMBFILE *f) {
int finetune, key_offset;
/**
21 22 Chars Sample 1 name. If the name is not a full
22 chars in length, it will be null
terminated.
If
the sample name begins with a '#' character (ASCII $23 (35)) then this is
assumed not to be an instrument name, and is probably a message.
*/
dumbfile_getnc((char *)sample->name, 22, f);
sample->name[22] = 0;
sample->filename[0] = 0;
/** Each finetune step changes the note 1/8th of a semitone. */
finetune = (signed char)(dumbfile_getc(f) << 4) >> 4; /* signed nibble */
sample->default_volume =
dumbfile_getc(f); // Should we be setting global_volume to this instead?
sample->global_volume = 64;
if (sample->default_volume > 64)
sample->default_volume = 64;
key_offset = (signed char)dumbfile_getc(f); /* base key offset */
sample->length = dumbfile_igetl(f);
sample->loop_start = dumbfile_igetl(f);
sample->loop_end = sample->loop_start + dumbfile_igetl(f);
if (sample->length <= 0) {
sample->flags = 0;
return 0;
}
sample->flags = IT_SAMPLE_EXISTS;
sample->default_pan = 0;
sample->C5_speed =
(int)(AMIGA_CLOCK / 214.0 *
pow(DUMB_SEMITONE_BASE, key_offset)); //( long )( 16726.0 * pow(
// DUMB_PITCH_BASE, finetune
//* 32 ) );
sample->finetune = finetune * 32;
// the above line might be wrong
if ((sample->loop_end - sample->loop_start > 2) &&
(sample->loop_end <= sample->length))
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->max_resampling_quality = -1;
return dumbfile_error(f);
}
static int it_ptm_read_sample_header(IT_SAMPLE *sample, long *offset, DUMBFILE *f)
{
int flags;
flags = dumbfile_getc(f);
dumbfile_getnc((char *)sample->filename, 12, f);
sample->filename[12] = 0;
sample->default_volume = dumbfile_getc(f);
sample->C5_speed = dumbfile_igetw(f) << 1;
dumbfile_skip(f, 2); /* segment */
*offset = dumbfile_igetl(f);
sample->length = dumbfile_igetl(f);
sample->loop_start = dumbfile_igetl(f);
sample->loop_end = dumbfile_igetl(f);
/* GUSBegin, GUSLStart, GUSLEnd, GUSLoop, reserverd */
dumbfile_skip(f, 4+4+4+1+1);
dumbfile_getnc((char *)sample->name, 28, f);
sample->name[28] = 0;
/*
if (dumbfile_mgetl(f) != DUMB_ID('P','T','M','S'))
return -1;
*/
/* BLAH! Shit likes to have broken or missing sample IDs */
dumbfile_skip(f, 4);
if ((flags & 3) == 0) {
/* Looks like no sample */
sample->flags &= ~IT_SAMPLE_EXISTS;
return dumbfile_error(f);
}
sample->global_volume = 64;
sample->flags = IT_SAMPLE_EXISTS;
if (flags & 4) sample->flags |= IT_SAMPLE_LOOP;
if (flags & 8) sample->flags |= IT_SAMPLE_PINGPONG_LOOP;
if (flags & 16) {
sample->flags |= IT_SAMPLE_16BIT;
sample->length >>= 1;
sample->loop_start >>= 1;
sample->loop_end >>= 1;
}
/* I (entheh) have two XM files saved by a very naughty program. After a
* 16-bit sample, it saved a rogue byte. The length of the sample was indeed
* an odd number, incremented to include the rogue byte.
*
* In this function we are converting sample lengths and loop points so they
* are measured in samples. This means we forget about the extra bytes, and
* they don't get skipped. So we fail trying to read the next instrument.
*
* To get around this, this function returns the number of rogue bytes that
* won't be accounted for by reading sample->length samples. It returns a
* negative number on failure.
*/
static int it_xm_read_sample_header(IT_SAMPLE *sample, DUMBFILE *f)
{
int type;
int relative_note_number; /* relative to C4 */
int finetune;
int roguebytes;
int roguebytesmask;
int reserved;
sample->length = dumbfile_igetl(f);
sample->loop_start = dumbfile_igetl(f);
sample->loop_end = sample->loop_start + dumbfile_igetl(f);
sample->global_volume = 64;
sample->default_volume = dumbfile_getc(f);
finetune = (signed char)dumbfile_getc(f); /* -128..127 <=> -1 semitone .. +127/128 of a semitone */
type = dumbfile_getc(f);
sample->default_pan = dumbfile_getc(f); /* 0-255 */
relative_note_number = (signed char)dumbfile_getc(f);
reserved = dumbfile_getc(f);
dumbfile_getnc((char *)sample->name, 22, f);
sample->name[22] = 0;
trim_whitespace((char *)sample->name, 22);
sample->filename[0] = 0;
if (dumbfile_error(f))
return -1;
sample->C5_speed = (long)(16726.0*pow(DUMB_SEMITONE_BASE, relative_note_number) /**pow(DUMB_PITCH_BASE, )*/ );
sample->finetune = finetune*2;
sample->flags = IT_SAMPLE_EXISTS;
if (reserved == 0xAD &&
(!(type & (XM_SAMPLE_16BIT | XM_SAMPLE_STEREO))))
{
/* F U Olivier Lapicque */
roguebytes = 4;
roguebytesmask = 4 << 2;
}
else
{
roguebytes = (int)sample->length;
roguebytesmask = 3;
}
if (type & XM_SAMPLE_16BIT) {
sample->flags |= IT_SAMPLE_16BIT;
sample->length >>= 1;
sample->loop_start >>= 1;
sample->loop_end >>= 1;
} else
static void *combining_load_signal(DUH *duh, DUMBFILE *file)
{
COMBINING_SIGNAL *signal;
int n_signals;
(void)duh;
n_signals = dumbfile_getc(file);
/* No point in combining only one signal! */
if (dumbfile_error(file) || n_signals <= 1)
return NULL;
signal = malloc(sizeof(*signal) + n_signals * sizeof(*signal->sig));
if (!signal)
return NULL;
signal->n_signals = n_signals;
{
int n;
for (n = 0; n < signal->n_signals; n++) {
signal->sig[n] = dumbfile_igetl(file);
if (dumbfile_error(file)) {
free(signal);
return NULL;
}
}
}
return signal;
}
/* read_duh(): reads a DUH from an already open DUMBFILE, and returns its
* pointer, or null on error. The file is not closed.
*/
DUH *read_duh(DUMBFILE *f) {
DUH *duh;
int i;
if (dumbfile_mgetl(f) != DUH_SIGNATURE)
return NULL;
duh = malloc(sizeof(*duh));
if (!duh)
return NULL;
duh->length = dumbfile_igetl(f);
if (dumbfile_error(f) || duh->length <= 0) {
free(duh);
return NULL;
}
duh->n_signals = (int)dumbfile_igetl(f);
if (dumbfile_error(f) || duh->n_signals <= 0) {
free(duh);
return NULL;
}
duh->signal = malloc(sizeof(*duh->signal) * duh->n_signals);
if (!duh->signal) {
free(duh);
return NULL;
}
for (i = 0; i < duh->n_signals; i++)
duh->signal[i] = NULL;
for (i = 0; i < duh->n_signals; i++) {
if (!(duh->signal[i] = read_signal(duh, f))) {
unload_duh(duh);
return NULL;
}
}
return duh;
}
/* I (entheh) have two XM files saved by a very naughty program. After a
* 16-bit sample, it saved a rogue byte. The length of the sample was indeed
* an odd number, incremented to include the rogue byte.
*
* In this function we are converting sample lengths and loop points so they
* are measured in samples. This means we forget about the extra bytes, and
* they don't get skipped. So we fail trying to read the next instrument.
*
* To get around this, this function returns the number of rogue bytes that
* won't be accounted for by reading sample->length samples. It returns a
* negative number on failure.
*/
static int it_xm_read_sample_header(IT_SAMPLE *sample, DUMBFILE *f)
{
int type;
int relative_note_number; /* relative to C4 */
int finetune;
int roguebytes;
int roguebytesmask;
sample->length = dumbfile_igetl(f);
sample->loop_start = dumbfile_igetl(f);
sample->loop_end = sample->loop_start + dumbfile_igetl(f);
sample->global_volume = 64;
sample->default_volume = dumbfile_getc(f);
finetune = (signed char)dumbfile_getc(f); /* -128..127 <=> -1 semitone .. +127/128 of a semitone */
type = dumbfile_getc(f);
sample->default_pan = dumbfile_getc(f); /* 0-255 */
relative_note_number = (signed char)dumbfile_getc(f);
dumbfile_skip(f, 1); /* reserved */
dumbfile_getnc(sample->name, 22, f);
sample->name[22] = 0;
sample->filename[0] = 0;
if (dumbfile_error(f))
return -1;
sample->C5_speed = (long)(16726.0*pow(DUMB_SEMITONE_BASE, relative_note_number)*pow(DUMB_PITCH_BASE, finetune*2));
sample->flags = IT_SAMPLE_EXISTS;
roguebytes = (int)sample->length;
roguebytesmask = 3;
if (type & XM_SAMPLE_16BIT) {
sample->flags |= IT_SAMPLE_16BIT;
sample->length >>= 1;
sample->loop_start >>= 1;
sample->loop_end >>= 1;
} else
static void *sequence_load_signal(DUH *duh, DUMBFILE *file)
{
long size;
unsigned char *signal;
(void)duh;
size = dumbfile_igetl(file);
if (dumbfile_error(file) || size <= 0)
return NULL;
signal = malloc(size);
if (!signal)
return NULL;
if (dumbfile_getnc((char *)signal, size, file) < size) {
free(signal);
return NULL;
}
return signal;
}
static int it_xm_read_instrument(IT_INSTRUMENT *instrument, XM_INSTRUMENT_EXTRA *extra, DUMBFILE *f)
{
unsigned long size, bytes_read;
unsigned short vol_points[24];
unsigned short pan_points[24];
int i, type;
const unsigned long max_size = 4 + 22 + 1 + 2 + 4 + 96 + 48 + 48 + 1 * 14 + 2 + 2;
unsigned long skip_end = 0;
/* Header size. Tends to be more than the actual size of the structure.
* So unread bytes must be skipped before reading the first sample
* header.
*/
if ( limit_xm_resize( f, 4 ) < 0 ) return -1;
size = dumbfile_igetl(f);
if ( size == 0 ) size = max_size;
else if ( size > max_size )
{
skip_end = size - max_size;
size = max_size;
}
if ( limit_xm_resize( f, size - 4 ) < 0 ) return -1;
dumbfile_getnc((char *)instrument->name, 22, f);
instrument->name[22] = 0;
trim_whitespace((char *)instrument->name, 22);
instrument->filename[0] = 0;
dumbfile_skip(f, 1); /* Instrument type. Should be 0, but seems random. */
extra->n_samples = dumbfile_igetw(f);
if (dumbfile_error(f) || (unsigned int)extra->n_samples > XM_MAX_SAMPLES_PER_INSTRUMENT)
return -1;
bytes_read = 4 + 22 + 1 + 2;
if (extra->n_samples) {
/* sample header size */
/*i = dumbfile_igetl(f);
if (!i || i > 0x28) i = 0x28;*/
dumbfile_skip(f, 4);
i = 0x28;
extra->sample_header_size = i;
/* sample map */
for (i = 0; i < 96; i++) {
instrument->map_sample[i] = dumbfile_getc(f) + 1;
instrument->map_note[i] = i;
}
if (dumbfile_error(f))
return 1;
/* volume/panning envelopes */
for (i = 0; i < 24; i++)
vol_points[i] = dumbfile_igetw(f);
for (i = 0; i < 24; i++)
pan_points[i] = dumbfile_igetw(f);
instrument->volume_envelope.n_nodes = dumbfile_getc(f);
instrument->pan_envelope.n_nodes = dumbfile_getc(f);
if (dumbfile_error(f))
return -1;
instrument->volume_envelope.sus_loop_start = dumbfile_getc(f);
instrument->volume_envelope.loop_start = dumbfile_getc(f);
instrument->volume_envelope.loop_end = dumbfile_getc(f);
instrument->pan_envelope.sus_loop_start = dumbfile_getc(f);
instrument->pan_envelope.loop_start = dumbfile_getc(f);
instrument->pan_envelope.loop_end = dumbfile_getc(f);
/* The envelope handler for XM files won't use sus_loop_end. */
type = dumbfile_getc(f);
instrument->volume_envelope.flags = 0;
if ((type & XM_ENVELOPE_ON) && instrument->volume_envelope.n_nodes)
instrument->volume_envelope.flags |= IT_ENVELOPE_ON;
if (type & XM_ENVELOPE_LOOP) instrument->volume_envelope.flags |= IT_ENVELOPE_LOOP_ON;
#if 1
if (type & XM_ENVELOPE_SUSTAIN) instrument->volume_envelope.flags |= IT_ENVELOPE_SUSTAIN_LOOP;
#else // This is now handled in itrender.c
/* let's avoid fading out when reaching the last envelope node */
if (!(type & XM_ENVELOPE_LOOP)) {
instrument->volume_envelope.loop_start = instrument->volume_envelope.n_nodes-1;
instrument->volume_envelope.loop_end = instrument->volume_envelope.n_nodes-1;
}
instrument->volume_envelope.flags |= IT_ENVELOPE_LOOP_ON;
#endif
type = dumbfile_getc(f);
instrument->pan_envelope.flags = 0;
if ((type & XM_ENVELOPE_ON) && instrument->pan_envelope.n_nodes)
instrument->pan_envelope.flags |= IT_ENVELOPE_ON;
if (type & XM_ENVELOPE_LOOP) instrument->pan_envelope.flags |= IT_ENVELOPE_LOOP_ON; // should this be here?
if (type & XM_ENVELOPE_SUSTAIN) instrument->pan_envelope.flags |= IT_ENVELOPE_SUSTAIN_LOOP;
if (it_xm_make_envelope(&instrument->volume_envelope, vol_points, 0) != 0) {
TRACE("XM error: volume envelope\n");
if (instrument->volume_envelope.flags & IT_ENVELOPE_ON) return -1;
}
if (it_xm_make_envelope(&instrument->pan_envelope, pan_points, -32) != 0) {
TRACE("XM error: pan envelope\n");
if (instrument->pan_envelope.flags & IT_ENVELOPE_ON) return -1;
}
instrument->pitch_envelope.flags = 0;
extra->vibrato_type = dumbfile_getc(f);
extra->vibrato_sweep = dumbfile_getc(f);
extra->vibrato_depth = dumbfile_getc(f);
extra->vibrato_speed = dumbfile_getc(f);
if (dumbfile_error(f) || extra->vibrato_type > 4) // XXX
return -1;
/** WARNING: lossy approximation */
instrument->fadeout = (dumbfile_igetw(f)*128 + 64)/0xFFF;
dumbfile_skip(f, 2); /* reserved */
bytes_read += 4 + 96 + 48 + 48 + 14*1 + 2 + 2;
} else
for (i = 0; i < 96; i++)
instrument->map_sample[i] = 0;
if (size > bytes_read && dumbfile_skip(f, size - bytes_read))
return -1;
if (skip_end && limit_xm_skip_end(f, skip_end))
return -1;
instrument->new_note_action = NNA_NOTE_CUT;
instrument->dup_check_type = DCT_OFF;
instrument->dup_check_action = DCA_NOTE_CUT;
instrument->pp_separation = 0;
instrument->pp_centre = 60; /* C-5 */
instrument->global_volume = 128;
instrument->default_pan = 32;
instrument->random_volume = 0;
instrument->random_pan = 0;
instrument->filter_cutoff = 0;
instrument->filter_resonance = 0;
return 0;
}
static int it_xm_read_pattern(IT_PATTERN *pattern, DUMBFILE *f, int n_channels, unsigned char *buffer, int version)
{
int size;
int pos;
int channel;
int row;
int effect, effectvalue;
IT_ENTRY *entry;
/* pattern header size */
if (dumbfile_igetl(f) != ( version == 0x0102 ? 0x08 : 0x09 ) ) {
TRACE("XM error: unexpected pattern header size\n");
return -1;
}
/* pattern data packing type */
if (dumbfile_getc(f) != 0) {
TRACE("XM error: unexpected pattern packing type\n");
return -1;
}
if ( version == 0x0102 )
pattern->n_rows = dumbfile_getc(f) + 1;
else
pattern->n_rows = dumbfile_igetw(f); /* 1..256 */
size = dumbfile_igetw(f);
pattern->n_entries = 0;
if (dumbfile_error(f))
return -1;
if (size == 0)
return 0;
if (size > 1280 * n_channels) {
TRACE("XM error: pattern data size > %d bytes\n", 1280 * n_channels);
return -1;
}
if (dumbfile_getnc((char *)buffer, size, f) < size)
return -1;
/* compute number of entries */
pattern->n_entries = 0;
pos = channel = row = 0;
while (pos < size) {
if (!(buffer[pos] & XM_ENTRY_PACKED) || (buffer[pos] & 31))
pattern->n_entries++;
channel++;
if (channel >= n_channels) {
channel = 0;
row++;
pattern->n_entries++;
}
if (buffer[pos] & XM_ENTRY_PACKED) {
static const char offset[] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4,
1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5 };
pos += 1 + offset[buffer[pos] & 31];
} else {
pos += 5;
}
}
if (row > pattern->n_rows) {
TRACE("XM error: wrong number of rows in pattern data\n");
return -1;
}
/* Whoops, looks like some modules may be short, a few channels, maybe even rows... */
while (row < pattern->n_rows)
{
pattern->n_entries++;
row++;
}
pattern->entry = malloc(pattern->n_entries * sizeof(*pattern->entry));
if (!pattern->entry)
return -1;
/* read the entries */
entry = pattern->entry;
pos = channel = row = 0;
while (pos < size) {
unsigned char mask;
if (buffer[pos] & XM_ENTRY_PACKED)
mask = buffer[pos++] & 31;
else
mask = 31;
if (mask) {
ASSERT(entry < pattern->entry + pattern->n_entries);
entry->channel = channel;
entry->mask = 0;
if (mask & XM_ENTRY_NOTE) {
int note = buffer[pos++]; /* 1-96 <=> C0-B7 */
entry->note = (note == XM_NOTE_OFF) ? (IT_NOTE_OFF) : (note-1);
entry->mask |= IT_ENTRY_NOTE;
}
if (mask & XM_ENTRY_INSTRUMENT) {
entry->instrument = buffer[pos++]; /* 1-128 */
entry->mask |= IT_ENTRY_INSTRUMENT;
}
if (mask & XM_ENTRY_VOLUME)
it_xm_convert_volume(buffer[pos++], entry);
effect = effectvalue = 0;
if (mask & XM_ENTRY_EFFECT) effect = buffer[pos++];
if (mask & XM_ENTRY_EFFECTVALUE) effectvalue = buffer[pos++];
_dumb_it_xm_convert_effect(effect, effectvalue, entry, 0);
entry++;
}
channel++;
if (channel >= n_channels) {
channel = 0;
row++;
IT_SET_END_ROW(entry);
entry++;
}
}
while (row < pattern->n_rows)
{
row++;
IT_SET_END_ROW(entry);
entry++;
}
return 0;
}
static int it_riff_dsmf_process_sample( IT_SAMPLE * sample, DUMBFILE * f, int len )
{
int flags;
dumbfile_getnc( (char *) sample->filename, 13, f );
sample->filename[ 14 ] = 0;
flags = dumbfile_igetw( f );
sample->default_volume = dumbfile_getc( f );
sample->length = dumbfile_igetl( f );
sample->loop_start = dumbfile_igetl( f );
sample->loop_end = dumbfile_igetl( f );
dumbfile_skip( f, 32 - 28 );
sample->C5_speed = dumbfile_igetw( f ) * 2;
dumbfile_skip( f, 36 - 34 );
dumbfile_getnc( (char *) sample->name, 28, f );
sample->name[ 28 ] = 0;
/*if ( data[ 0x38 ] || data[ 0x39 ] || data[ 0x3A ] || data[ 0x3B ] )
return -1;*/
if ( ! sample->length ) {
sample->flags &= ~IT_SAMPLE_EXISTS;
return 0;
}
/*if ( flags & ~( 2 | 1 ) )
return -1;*/
if ( sample->length + 64 > len )
return -1;
sample->flags = IT_SAMPLE_EXISTS;
sample->default_pan = 0;
sample->global_volume = 64;
sample->vibrato_speed = 0;
sample->vibrato_depth = 0;
sample->vibrato_rate = 0;
sample->vibrato_waveform = IT_VIBRATO_SINE;
sample->finetune = 0;
sample->max_resampling_quality = -1;
if ( flags & 1 )
{
if (((unsigned int)sample->loop_end <= (unsigned int)sample->length) &&
((unsigned int)sample->loop_start < (unsigned int)sample->loop_end))
{
sample->length = sample->loop_end;
sample->flags |= IT_SAMPLE_LOOP;
if ( flags & 0x10 ) sample->flags |= IT_SAMPLE_PINGPONG_LOOP;
}
}
sample->data = malloc( sample->length );
if ( ! sample->data )
return -1;
dumbfile_getnc( sample->data, sample->length, f );
if ( ! ( flags & 2 ) )
{
for ( flags = 0; flags < sample->length; ++flags )
( ( signed char * ) sample->data ) [ flags ] ^= 0x80;
}
return 0;
}
static int it_s3m_read_sample_header(IT_SAMPLE *sample, long *offset,
unsigned char *pack, int cwtv,
DUMBFILE *f) {
unsigned char type;
int flags;
type = dumbfile_getc(f);
dumbfile_getnc((char *)sample->filename, 12, f);
sample->filename[12] = 0;
if (type > 1) {
/** WARNING: no adlib support */
dumbfile_skip(f, 3 + 12 + 1 + 1 + 2 + 2 + 2 + 12);
dumbfile_getnc((char *)sample->name, 28, f);
sample->name[28] = 0;
dumbfile_skip(f, 4);
sample->flags &= ~IT_SAMPLE_EXISTS;
return dumbfile_error(f);
}
*offset = dumbfile_getc(f) << 20;
*offset += dumbfile_igetw(f) << 4;
sample->length = dumbfile_igetl(f);
sample->loop_start = dumbfile_igetl(f);
sample->loop_end = dumbfile_igetl(f);
sample->default_volume = dumbfile_getc(f);
dumbfile_skip(f, 1);
flags = dumbfile_getc(f);
if (flags < 0 || (flags != 0 && flags != 4))
/* Sample is packed apparently (or error reading from file). We don't
* know how to read packed samples.
*/
return -1;
*pack = flags;
flags = dumbfile_getc(f);
sample->C5_speed = dumbfile_igetl(f) << 1;
/* Skip four unused bytes and three internal variables. */
dumbfile_skip(f, 4 + 2 + 2 + 4);
dumbfile_getnc((char *)sample->name, 28, f);
sample->name[28] = 0;
if (type == 0 || sample->length <= 0) {
/* Looks like no-existy. Anyway, there's for sure no 'SCRS' ... */
sample->flags &= ~IT_SAMPLE_EXISTS;
return dumbfile_error(f);
}
if (dumbfile_mgetl(f) != DUMB_ID('S', 'C', 'R', 'S'))
return -1;
sample->global_volume = 64;
sample->flags = IT_SAMPLE_EXISTS;
if (flags & 1)
sample->flags |= IT_SAMPLE_LOOP;
/* The ST3 TECH.DOC is unclear on this, but IMAGO Orpheus is not. Piece of
* crap. */
if (flags & 2) {
sample->flags |= IT_SAMPLE_STEREO;
if ((cwtv & 0xF000) == 0x2000) {
sample->length >>= 1;
sample->loop_start >>= 1;
sample->loop_end >>= 1;
}
struct riff *riff_parse(DUMBFILE *f, long offset, long size, unsigned proper) {
unsigned stream_size;
struct riff *stream;
if (size < 8)
return 0;
if (dumbfile_seek(f, offset, DFS_SEEK_SET))
return 0;
if (dumbfile_mgetl(f) != DUMB_ID('R', 'I', 'F', 'F'))
return 0;
stream_size = (int)dumbfile_igetl(f);
if (stream_size + 8 > size)
return 0;
if (stream_size < 4)
return 0;
stream = (struct riff *)malloc(sizeof(struct riff));
if (!stream)
return 0;
stream->type = (int)dumbfile_mgetl(f);
stream->chunk_count = 0;
stream->chunks = 0;
stream_size -= 4;
while (stream_size && !dumbfile_error(f)) {
struct riff_chunk *chunk;
if (stream_size < 8)
break;
stream->chunks = (struct riff_chunk *)realloc(
stream->chunks,
(stream->chunk_count + 1) * sizeof(struct riff_chunk));
if (!stream->chunks)
break;
chunk = stream->chunks + stream->chunk_count;
chunk->type = (int)dumbfile_mgetl(f);
chunk->size = (int)dumbfile_igetl(f);
chunk->offset = dumbfile_pos(f);
stream_size -= 8;
if (stream_size < chunk->size)
break;
if (chunk->type == DUMB_ID('R', 'I', 'F', 'F')) {
chunk->nested =
riff_parse(f, chunk->offset - 8, chunk->size + 8, proper);
if (!chunk->nested)
break;
} else {
chunk->nested = 0;
}
dumbfile_seek(f, chunk->offset + chunk->size, DFS_SEEK_SET);
stream_size -= chunk->size;
if (proper && (chunk->size & 1)) {
dumbfile_skip(f, 1);
--stream_size;
}
++stream->chunk_count;
}
if (stream_size) {
riff_free(stream);
stream = 0;
}
return stream;
}
static int it_s3m_read_sample_header(IT_SAMPLE *sample, long *offset, DUMBFILE *f)
{
unsigned char type;
int flags;
type = dumbfile_getc(f);
if (type > 1) {
/** WARNING: no adlib support */
}
dumbfile_getnc(sample->filename, 13, f);
sample->filename[13] = 0;
*offset = dumbfile_igetw(f) << 4;
sample->length = dumbfile_igetl(f);
sample->loop_start = dumbfile_igetl(f);
sample->loop_end = dumbfile_igetl(f);
sample->default_volume = dumbfile_getc(f);
dumbfile_skip(f, 1);
if (dumbfile_getc(f) != 0)
/* Sample is packed apparently (or error reading from file). We don't
* know how to read packed samples.
*/
return -1;
flags = dumbfile_getc(f);
sample->C5_speed = dumbfile_igetl(f) << 1;
/* Skip four unused bytes and three internal variables. */
dumbfile_skip(f, 4+2+2+4);
dumbfile_getnc(sample->name, 28, f);
sample->name[28] = 0;
if (type == 0) {
/* Looks like no-existy. Anyway, there's for sure no 'SCRS' ... */
sample->flags &= ~IT_SAMPLE_EXISTS;
return dumbfile_error(f);
}
if (dumbfile_mgetl(f) != DUMB_ID('S','C','R','S'))
return -1;
sample->global_volume = 64;
sample->flags = IT_SAMPLE_EXISTS;
if (flags & 1) sample->flags |= IT_SAMPLE_LOOP;
if (flags & 2) sample->flags |= IT_SAMPLE_STEREO;
if (flags & 4) sample->flags |= IT_SAMPLE_16BIT;
sample->default_pan = 0; // 0 = don't use, or 160 = centre?
if (sample->length <= 0)
sample->flags &= ~IT_SAMPLE_EXISTS;
else if (sample->flags & IT_SAMPLE_LOOP) {
if ((unsigned int)sample->loop_end > (unsigned int)sample->length)
sample->flags &= ~IT_SAMPLE_LOOP;
else if ((unsigned int)sample->loop_start >= (unsigned int)sample->loop_end)
sample->flags &= ~IT_SAMPLE_LOOP;
else
/* ScreamTracker seems not to save what comes after the loop end
* point, but rather to assume it is a duplicate of what comes at
* the loop start point. I am not completely sure of this though.
* It is easy to evade; simply truncate the sample.
*/
sample->length = sample->loop_end;
}
//Do we need to set all these?
sample->vibrato_speed = 0;
sample->vibrato_depth = 0;
sample->vibrato_rate = 0;
sample->vibrato_waveform = IT_VIBRATO_SINE;
return dumbfile_error(f);
}
static sigdata_t *sample_load_sigdata(DUH *duh, DUMBFILE *file)
{
SAMPLE_SIGDATA *sigdata;
long size;
long n;
int flags;
(void)duh;
size = dumbfile_igetl(file);
if (dumbfile_error(file) || size <= 0)
return NULL;
flags = dumbfile_getc(file);
if (flags < 0)
return NULL;
sigdata = malloc(sizeof(*sigdata));
if (!sigdata)
return NULL;
sigdata->samples = malloc(size * sizeof(sample_t));
if (!sigdata->samples) {
free(sigdata);
return NULL;
}
sigdata->size = size;
sigdata->flags = flags;
if (sigdata->flags & (SAMPFLAG_LOOP | SAMPFLAG_XLOOP)) {
sigdata->loop_start = dumbfile_igetl(file);
if (dumbfile_error(file) || (unsigned long)sigdata->loop_start >= (unsigned long)size) {
free(sigdata->samples);
free(sigdata);
return NULL;
}
if (sigdata->flags & SAMPFLAG_LOOP)
sigdata->loop_end = size;
else {
sigdata->loop_end = dumbfile_igetl(file);
if (dumbfile_error(file) || sigdata->loop_end <= sigdata->loop_start || sigdata->loop_end > size) {
free(sigdata->samples);
free(sigdata);
return NULL;
}
}
} else {
sigdata->loop_start = 0;
sigdata->loop_end = size;
}
if (sigdata->flags & SAMPFLAG_16BIT) {
for (n = 0; n < size; n++) {
int m = dumbfile_igetw(file);
if (m < 0) {
free(sigdata->samples);
free(sigdata);
return NULL;
}
sigdata->samples[n] = (int)(signed short)m << 8;
}
} else {
for (n = 0; n < size; n++) {
int m = dumbfile_getc(file);
if (m < 0) {
free(sigdata->samples);
free(sigdata);
return NULL;
}
sigdata->samples[n] = (int)(signed char)m << 16;
}
}
return sigdata;
}
