def build_data(preset, encoder=None):
""" Build Sysex preset data to given encoder instance
Returns the length of newly-built data.
If encoder is None, create a throw-away instance of the encoder, useful for
calculating data length in caller
"""
if encoder is None:
encoder = SyxEncoder()
rotaries = structs.build_rotaries()
longsliders = structs.build_longsliders()
hsliders = structs.build_hsliders()
vsliders = structs.build_vsliders()
# pads, sliders, buttons, etc.
for i in range(16):
_unwrap(encoder, preset[structs.PADS]["Pad%s" % i], structs.pads)
for i in range(2):
_unwrap(encoder, preset[structs.ROTARIES]["Rotary%s" % i], rotaries)
_unwrap(encoder, preset[structs.LONG_SLIDERS]["LongSlider0"], longsliders)
for i in range(4):
_unwrap(encoder, preset[structs.H_SLIDERS]["HSlider%s" % i], hsliders)
for i in range(4):
_unwrap(encoder, preset[structs.V_SLIDERS]["VSlider%s" % i], vsliders)
for i in range(4):
_unwrap(encoder, preset[structs.LR_BUTTONS]["LeftRightButton%s" % i], structs.lrswitches)
for i in range(2):
_unwrap(encoder, preset[structs.UD_BUTTONS]["UpDownButton%s" % i], structs.udswitches)
_unwrap(encoder, preset[structs.RHOMBUS_BUTTONS]["RhombusButton0"], structs.rhswitches)
for i in range(3):
_unwrap(encoder, preset[structs.TRANSPORT_BUTTONS]["TransportButton%s" % i], structs.tbuttons)
_unwrap(encoder, preset[structs.MODE_BUTTONS]["ModeButton0"], structs.mswitches)
# globals
for path in structs.globalpaths:
x = preset
for item in path:
x = x[item]
encoder.sum_encode(x)
# special case: velocity table
for velocity in preset[structs.PADS]['padVelocityTable']:
encoder.sum_encode(velocity)
data_length = encoder.counter
return data_length
def json2syx(preset, num):
""" Encode json-format preset to SysEx dump for preset number 'num'.
"""
rotaries = structs.build_rotaries()
longsliders = structs.build_longsliders()
hsliders = structs.build_hsliders()
vsliders = structs.build_vsliders()
#
# Preamble
#
data = SyxEncoder()
data.start()
for magic in syx_ident_magic:
data.write(magic)
# pad with zeroes until offset 0x21
for i in range(13*2):
data.write(0)
data.start_packet()
data.crc_init()
data.chunk_init()
data.encode_crc(0x00) # TYPE_MSB
data.encode_crc(0x02) # TYPE_LSB
# ID: 0x1110 = firmware, 0x2220 = preset data
# 30xx = load preset
data.encode_crc(0x22)
data.encode_crc(0x20)
data.encode_crc_int()
data.flush()
#
# Preset header
#
data.reset_sum_byte()
data.encode(syx_preset_start)
data.encode(num)
data_length = build_data(preset, encoder=None)
syx_preset_length_msb = (data_length >> 8) & 0xff
syx_preset_length_lsb = data_length & 0xff
data.encode(syx_preset_length_msb)
data.encode(syx_preset_length_lsb)
data.crc_init()
#
# Preset data
#
build_data(preset, encoder=data)
data.encode(num) # index of this preset
data.encode(num) # index of last preset in this SysEx
data.encode_sum_byte()
data.flush()
data.stop()
#print "data_length=%s, msb=%s, lsb=%s" % (data_length, hex(syx_preset_length_msb), hex(syx_preset_length_lsb))
return ''.join(struct.pack("B", x) for x in data._buf)