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'''
Copyright (c) 2018 Modul 9/HiFiBerry
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
'''
from collections.abc import Iterable
import logging
from hifiberrydsp.filtering.volume import percent2amplification, \
decibel2amplification
from hifiberrydsp.filtering.biquad import Biquad
from hifiberrydsp.parser.xmlprofile import XmlProfile
from hifiberrydsp.hardware.adau145x import Adau145x
from hifiberrydsp.datatools import int_data
class SettingsFile():
def __init__(self, filename, fs=48000, dsp=Adau145x()):
self.values = {}
self.fs = fs
self.dsp = dsp
with open(filename) as settingsfile:
for line in settingsfile:
if len(line.strip()) == 0 or line.startswith("#"):
continue
try:
(attrib, value) = line.split(":", maxsplit=1)
except:
logging.error("can't parse line %s", line)
continue
attrib = attrib.strip()
if attrib.lower().startswith("iir"):
value = self.parse_biquad(value)
else:
value = self.parse_value(value.strip())
self.values[attrib] = value
def parse_value(self, value):
if value.endswith("%"):
percent = int(value[0:-1])
return percent2amplification(percent)
elif value.lower().endswith("db"):
db = int(value[0:-2])
return decibel2amplification(db)
elif "." in value:
return float(value)
elif value.startswith("0x"):
return int(value, 16)
else:
return int(value)
def parse_biquad(self, value):
filters = value.split(",")
result = []
for f in filters:
try:
biquad = Biquad.create_filter(f, self.fs)
except Exception:
biquad = None
if biquad == None:
logging.error("can't parse filter definition %s", f)
else:
result.append(biquad)
return result
def get_updates(self, xmlprofile):
replace = {}
for attribute in self.values:
(addr, length) = xmlprofile.get_addr_length(attribute)
if addr is None and attribute.startswith("0x"):
# if it's not a setting form the profile, it might be
# a memory address
try:
addr = int(attribute,16)
length = 1
except:
logging.error("can't parse address %s", addr)
addr = None
if addr is None:
continue
val = self.values[attribute]
word_length = Adau145x.cell_len(addr)
memory = self.param_to_bytes(val, length, word_length=word_length)
if len(memory) <= self.dsp.cell_len(addr):
replace[addr] = memory
else:
# Split long replaced into single words
assert len(memory) % word_length == 0
while len(memory) > 0:
cellvalue = memory[0:word_length]
replace[addr] = cellvalue
addr += 1
memory = memory[word_length:]
return replace
def update_xml_profile(self, xmlprofile):
replace = self.get_updates(xmlprofile)
xmlprofile.replace_eeprom_cells(replace)
xmlprofile.replace_ram_cells(replace)
def param_to_bytes(self, value, max_length=1, ignore_limit=False, word_length=None):
biquad = False
if word_length is None:
word_length = self.dsp.WORD_LENGTH
if isinstance(value, float):
value = self.dsp.decimal_repr(value)
res = int_data(value, word_length )
elif isinstance(value, int):
res = int_data(value, word_length)
elif isinstance(value, Biquad):
res = []
bqn = value.normalized()
vals = []
vals.append(bqn.b2)
vals.append(bqn.b1)
vals.append(bqn.b0)
vals.append(-bqn.a2)
vals.append(-bqn.a1)
for v in vals:
dec = self.dsp.decimal_repr(v)
res = res + list(int_data(dec, word_length))
elif isinstance(value, Iterable):
res = []
for part in value:
if isinstance(part, Biquad):
biquad = True
res = res + self.param_to_bytes(part, 0, ignore_limit=True)
else:
raise RuntimeError("parameter type not implemented: %s",
type(value).__name__)
while len(res) < max_length * word_length:
if biquad:
# Fill biquad filter banks with pass filters
passfilter = Biquad.pass_filter()
res = res + \
self.param_to_bytes(passfilter, 0, ignore_limit=True)
else:
# Fill with zeros
res.append(0)
if not(ignore_limit) and len(res) > (max_length * word_length):
logging.error("parameter set too long (%s bytes), won't fit into %s words",
len(res),
max_length * self.dsp.WORD_LENGTH)
res = None
return res
def demo():
xml = XmlProfile("sample_files/xml/4way-iir.xml")
xml.write_xml("/tmp/x.xml")
fs = xml.samplerate()
rf = SettingsFile("sample_files/simple-settings.txt", fs)
print(rf.values)
rf.update_xml_profile(xml)
print("writing y.xml")
xml.write_xml("/tmp/y.xml")
rf = SettingsFile("sample_files/settings.txt", fs)
print(rf.values)
rf.update_xml_profile(xml)
print("writing z.xml")
xml.write_xml("/tmp/z.xml")
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