Instrument replace_instrument(byte[] mod_header, int idx, byte[] data_input, int replacetranspose)
throws IOException {
int header_offset, sample_data_length;
int loop_start, loop_length, sample_idx, fine_tune;
Instrument instrument;
Sample sample;
// byte[] raw_sample_data;
short[] sample_data;
header_offset = (idx - 1) * 30 + 20;
instrument = new Instrument();
sample = new Sample();
// sample_data_length = unsigned_short_be( mod_header, header_offset + 22 ) << 1;
sample_data_length = data_input.length;
System.out.println("Sampledata bytes: " + sample_data_length);
fine_tune = mod_header[header_offset + 24] & 0x0F;
if (fine_tune > 7) {
fine_tune -= 16;
}
sample.transpose = (fine_tune + (replacetranspose * 10) << IBXM.FP_SHIFT) / 96;
sample.volume = mod_header[header_offset + 25] & 0x7F;
loop_start = unsigned_short_be(mod_header, header_offset + 26) << 1;
loop_length = unsigned_short_be(mod_header, header_offset + 28) << 1;
if (loop_length < 4) {
loop_length = 0;
}
// raw_sample_data = new byte[ sample_data_length ];
sample_data = new short[sample_data_length];
for (sample_idx = 0; sample_idx < data_input.length; sample_idx++) {
sample_data[sample_idx] = (short) (data_input[sample_idx] << 8);
}
sample.set_sample_data(sample_data, loop_start, loop_length, false);
instrument.set_num_samples(1);
instrument.set_sample(0, sample);
return instrument;
}
