Esempio n. 1
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    def write_header(self):
        # create xi file
        self.output_file.write(struct.pack(
            '21s22sb20sh',
            'Extended Instrument: ',
            (self.filename[:-4] + ' ' * 22)[:22], 0x1a, pad_name(VERSION, 20), 0x0
        ))

        self.output_file.write(struct.pack('96b', *(self.notes_samples)))
Esempio n. 2
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    def write_regions_meta(self):
        self.output_file.write(struct.pack('h', len(self.regions)))  # number of samples

        for region in self.regions:
            self.output_file.write(struct.pack(
                'i', region['sample_bittype'] * region['sample_length']))  # sample length
            self.output_file.write(struct.pack('2i', 0, 0))  # sample loop start and end
            # volume
            volume = 255
            if 'volume' in region:
                volume = math.floor(
                    255 * math.exp(float(region['volume']) / 10) / math.exp(0.6)
                )  # volume is in dB

            self.output_file.write(struct.pack('B', volume))

            self.output_file.write(struct.pack('b', int(region['tune'])))  # finetune (signed!)
            self.output_file.write(struct.pack('b', region['sample_type']))  # sample type

            #panning (unsigned!)
            pan = 128
            if 'pan' in region:
                pan = (float(region['pan']) + 100) * 255 / 200
            self.output_file.write(struct.pack('B', pan))

            key = region['pitch_keycenter'] if 'pitch_keycenter' in region else region['lokey']

            self.output_file.write(struct.pack(
                'b',
                1 - notes.index(key)
                + notes.index('e6')
            ))  # relative note - transpose c4 ~ 00

            sample_name = pad_name(os.path.split(region['sample_path'])[1], 22)

            self.output_file.write(struct.pack('b', len(sample_name.strip(' '))))
            self.output_file.write(struct.pack('22s', sample_name))