def convert_sample_freq(self, sample_id, target_freq):
# Get current data and format info
cur_handle = self._get_sample_data_handle(sample_id, convert_to_float=True)
channels = cur_handle.get_channels()
cur_freq = cur_handle.get_audio_rate()
cur_bits, cur_is_float = self.get_sample_format(sample_id) # original format
ratio = target_freq / cur_freq
# Get converted audio data
src = SampleRate(SRC_SINC_BEST_QUALITY, channels)
src.set_ratio(ratio)
src.add_input_data(*cur_handle.read())
new_data = src.get_output_data()
new_length = len(new_data[0])
# Write new sample
new_handle = WavPackWMem(target_freq, channels, cur_is_float, cur_bits)
if not cur_is_float:
to_max = 2**(cur_bits - 1) - 1
to_min = -to_max - 1
mult = to_max
for ch in new_data:
for i in range(len(ch)):
ch[i] = min(max(to_min, int(ch[i] * mult)), to_max)
new_handle.write(*new_data)
raw_data = new_handle.get_contents()
sample_data_key = self._get_full_sample_key(sample_id, 'p_sample.wv')
new_header = self._get_sample_header(sample_id)
new_header['freq'] = target_freq
# Adjust loop bounds
if new_length == 0:
if 'loop_mode' in new_header:
new_header['loop_mode'] = 'off'
else:
if 'loop_start' in new_header:
target_start = int(round(new_header['loop_start'] * ratio))
new_header['loop_start'] = min(max(0, target_start), new_length - 1)
if 'loop_end' in new_header:
cur_loop_start = new_header.get('loop_start', 0)
target_end = int(round(new_header['loop_end'] * ratio))
new_header['loop_end'] = min(max(
cur_loop_start + 1, target_end), new_length)
sample_header_key = self._get_full_sample_key(sample_id, 'p_sh_sample.json')
transaction = {}
transaction[sample_header_key] = new_header
transaction[sample_data_key] = raw_data
self._store.put(transaction)
def get_task_post_loop_cut(self, sample_id, on_complete):
# Get sample info
header = self._get_sample_header(sample_id)
assert header['loop_mode'] != 'off'
assert header['loop_end'] > 0
loop_end = header['loop_end']
cur_handle = self._get_sample_data_handle(sample_id, convert_to_float=False)
channels = cur_handle.get_channels()
sample_length = cur_handle.get_length()
use_float = cur_handle.is_float()
bits = cur_handle.get_bits()
assert loop_end < sample_length
msg_fmt = 'Cutting sample data past loop end...'
self._session.set_progress_description(msg_fmt)
self._session.set_progress_position(0)
self._updater.signal_update('signal_progress_start')
yield
# Copy sample data until loop end
new_handle = WavPackWMem(cur_handle.get_audio_rate(), channels, use_float, bits)
frames_left = loop_end
cur_data = cur_handle.read(min(frames_left, 4096))
while cur_data[0]:
self._session.set_progress_position(
min(1, (loop_end - frames_left) / loop_end))
self._updater.signal_update('signal_progress_step')
yield
if (not use_float) and (bits < 32):
shift = 32 - bits
for ch_num, ch in enumerate(cur_data):
for i in range(len(ch)):
ch[i] >>= shift
new_handle.write(*cur_data)
frames_left -= len(cur_data[0])
cur_data = cur_handle.read(min(frames_left, 4096))
self._session.set_progress_position(1)
raw_data = new_handle.get_contents()
sample_data_key = self._get_full_sample_key(sample_id, 'p_sample.wv')
transaction = { sample_data_key: raw_data }
def notifier(progress):
if progress == 1:
self._updater.signal_update('signal_progress_finished')
on_complete()
self._store.put(transaction, transaction_notifier=notifier)
def get_task_post_loop_cut(self, sample_id, on_complete):
# Get sample info
header = self._get_sample_header(sample_id)
assert header['loop_mode'] != 'off'
assert header['loop_end'] > 0
loop_end = header['loop_end']
cur_handle = self._get_sample_data_handle(sample_id, convert_to_float=False)
channels = cur_handle.get_channels()
sample_length = cur_handle.get_length()
use_float = cur_handle.is_float()
bits = cur_handle.get_bits()
assert loop_end < sample_length
msg_fmt = 'Cutting sample data past loop end...'
self._session.set_progress_description(msg_fmt)
self._session.set_progress_position(0)
self._updater.signal_update('signal_progress_start')
yield
# Copy sample data until loop end
new_handle = WavPackWMem(cur_handle.get_audio_rate(), channels, use_float, bits)
frames_left = loop_end
cur_data = cur_handle.read(min(frames_left, 4096))
while cur_data[0]:
self._session.set_progress_position(
min(1, (loop_end - frames_left) / loop_end))
self._updater.signal_update('signal_progress_step')
yield
if (not use_float) and (bits < 32):
shift = 32 - bits
for ch_num, ch in enumerate(cur_data):
for i in range(len(ch)):
ch[i] >>= shift
new_handle.write(*cur_data)
frames_left -= len(cur_data[0])
cur_data = cur_handle.read(min(frames_left, 4096))
self._session.set_progress_position(1)
raw_data = new_handle.get_contents()
sample_data_key = self._get_full_sample_key(sample_id, 'p_sample.wv')
transaction = { sample_data_key: raw_data }
def notifier(progress):
if progress == 1:
self._updater.signal_update('signal_progress_finished')
on_complete()
self._store.put(transaction, transaction_notifier=notifier)
def _get_transaction_import_sample(self, sample_id, path):
freq = 48000
if path.endswith('.wv'):
with open(path, 'rb') as f:
sample_data = f.read()
validator = WavPackValidator(sample_data)
if not validator.is_data_valid():
raise SampleImportError('Could not import {}:\n{}'.format(
path, validator.get_validation_error()))
del validator
wp = WavPackRMem(sample_data)
freq = wp.get_audio_rate()
else:
try:
sf = SndFileR(path, convert_to_float=False)
sdata = list(sf.read())
except SndFileError as e:
raise SampleImportError('Could not import {}:\n{}'.format(path, str(e)))
freq = sf.get_audio_rate()
if sf.get_bits() < 32:
rshift = 32 - sf.get_bits()
for buf in sdata:
for i in range(len(buf)):
buf[i] >>= rshift
wv = WavPackWMem(
sf.get_audio_rate(), sf.get_channels(), sf.is_float(), sf.get_bits())
wv.write(*sdata)
sample_data = wv.get_contents()
format_exts = ('.wv', '.wav', '.au', '.flac')
name = os.path.basename(path)
if name.endswith(format_exts):
name = name[:name.rfind('.')]
sample_data_key = self._get_full_sample_key(sample_id, 'p_sample.wv')
sample_header_key = self._get_full_sample_key(sample_id, 'p_sh_sample.json')
sample_name_key = self._get_full_sample_key(sample_id, 'm_name.json')
header = { 'format': 'WavPack', 'freq': freq, }
transaction = {}
transaction[sample_data_key] = sample_data
transaction[sample_header_key] = header
transaction[sample_name_key] = name
return transaction
def _get_transaction_import_sample(self, sample_id, path):
freq = 48000
if path.endswith('.wv'):
with open(path, 'rb') as f:
sample_data = f.read()
validator = WavPackValidator(sample_data)
if not validator.is_data_valid():
raise SampleImportError('Could not import {}:\n{}'.format(
path, validator.get_validation_error()))
del validator
wp = WavPackRMem(sample_data)
freq = wp.get_audio_rate()
else:
try:
sf = SndFileR(path, convert_to_float=False)
sdata = list(sf.read())
except SndFileError as e:
raise SampleImportError('Could not import {}:\n{}'.format(path, str(e)))
freq = sf.get_audio_rate()
if sf.get_bits() < 32:
rshift = 32 - sf.get_bits()
for buf in sdata:
for i in range(len(buf)):
buf[i] >>= rshift
wv = WavPackWMem(
sf.get_audio_rate(), sf.get_channels(), sf.is_float(), sf.get_bits())
wv.write(*sdata)
sample_data = wv.get_contents()
format_exts = ('.wv', '.wav', '.au', '.flac')
name = os.path.basename(path)
if name.endswith(format_exts):
name = name[:name.rfind('.')]
sample_data_key = self._get_full_sample_key(sample_id, 'p_sample.wv')
sample_header_key = self._get_full_sample_key(sample_id, 'p_sh_sample.json')
sample_name_key = self._get_full_sample_key(sample_id, 'm_name.json')
header = { 'format': 'WavPack', 'freq': freq, }
transaction = {}
transaction[sample_data_key] = sample_data
transaction[sample_header_key] = header
transaction[sample_name_key] = name
return transaction
def get_task_create_xfade_loop_region(self, sample_id, xfade_length, on_complete):
# Get sample info
header = self._get_sample_header(sample_id)
assert header['loop_mode'] == 'uni'
loop_start = header['loop_start']
loop_end = header['loop_end']
loop_length = loop_end - loop_start
assert xfade_length > 0
assert xfade_length <= loop_length
assert xfade_length <= loop_start
cur_handle = self._get_sample_data_handle(sample_id, convert_to_float=False)
channels = cur_handle.get_channels()
sample_length = cur_handle.get_length()
use_float = cur_handle.is_float()
bits = cur_handle.get_bits()
msg_fmt = 'Creating looping region...'
self._session.set_progress_description(msg_fmt)
self._session.set_progress_position(0)
self._updater.signal_update('signal_progress_start')
yield
# Set up progress update helper
step_count = 0
total_step_count = 4
if not use_float:
total_step_count = 5
def add_step():
nonlocal step_count
step_count += 1
self._session.set_progress_position(min(1, step_count / total_step_count))
self._updater.signal_update('signal_progress_step')
yield
# Get all sample data
orig_data = cur_handle.read()
yield from add_step()
# Make copies of relevant sections
init_length = loop_end - xfade_length
init_data = [d[:init_length] for d in orig_data]
fadeout_data = [d[init_length:loop_end] for d in orig_data]
fadein_data = [d[loop_start - xfade_length:loop_start] for d in orig_data]
trail_data = [d[loop_start:] for d in orig_data]
assert len(fadeout_data[0]) == len(fadein_data[0])
yield from add_step()
# Create crossfaded section
xfade_data = [[] for _ in orig_data]
for ch in range(channels):
fadein_ch = fadein_data[ch]
fadeout_ch = fadeout_data[ch]
for i, (in_item, out_item) in enumerate(zip(fadein_ch, fadeout_ch)):
t = i / xfade_length
diff = in_item - out_item
xfade_item = out_item + t * diff
xfade_data[ch].append(xfade_item)
yield from add_step()
# Scale integer contents
if not use_float:
shift = 32 - bits
if shift > 0:
for init_ch in init_data:
for i in range(len(init_ch)):
init_ch[i] >>= shift
for trail_ch in trail_data:
for i in range(len(trail_ch)):
trail_ch[i] >>= shift
val_max = 2**(bits - 1) - 1
val_min = -val_max - 1
for xfade_ch in xfade_data:
for i in range(len(xfade_ch)):
shifted = int(xfade_ch[i]) >> shift
xfade_ch[i] = min(max(val_min, shifted), val_max)
yield from add_step()
# Write new sections
new_handle = WavPackWMem(cur_handle.get_audio_rate(), channels, use_float, bits)
new_handle.write(*init_data)
new_handle.write(*xfade_data)
new_handle.write(*trail_data)
yield from add_step()
raw_data = new_handle.get_contents()
sample_data_key = self._get_full_sample_key(sample_id, 'p_sample.wv')
transaction = { sample_data_key: raw_data }
def notifier(progress):
if progress == 1:
self._updater.signal_update('signal_progress_finished')
on_complete()
self._store.put(transaction, transaction_notifier=notifier)
def get_task_convert_sample_format(
self, sample_id, bits, use_float, normalise, on_complete):
# Get current format parameters
cur_handle = self._get_sample_data_handle(sample_id, convert_to_float=False)
channels = cur_handle.get_channels()
freq = cur_handle.get_audio_rate()
cur_bits = cur_handle.get_bits()
cur_is_float = cur_handle.is_float()
sample_length = cur_handle.get_length()
self._session.set_progress_description('Converting sample format...')
self._session.set_progress_position(0)
self._updater.signal_update('signal_progress_start')
yield
# Read sample data
data = [[] for _ in range(channels)]
chunk = cur_handle.read()
while len(chunk[0]) > 0:
for d, buf in zip(data, chunk):
d.extend(buf)
chunk = cur_handle.read()
# Get conversion ratio and bounds
from_max = 1 if cur_is_float else (2**31 - 1)
to_max = 1 if use_float else (2**(bits - 1) - 1)
to_min = -1 if use_float else (-to_max - 1)
mult = to_max / from_max
transaction = {}
if normalise:
# Normalise
max_abs = 0
for ch_num, ch in enumerate(data):
for i, item in enumerate(ch):
if (i & 0x3fff) == 0:
self._session.set_progress_position(
((ch_num + i / sample_length) / channels) * 0.5)
self._updater.signal_update('signal_progress_step')
yield
max_abs = max(max_abs, abs(item))
norm_mult = from_max / max_abs
if (norm_mult >= 1.01) or (norm_mult <= 0.99999):
mult *= norm_mult
# Adjust sample volume levels in note and hit maps
shift_dB = -math.log(norm_mult, 2) * 6
sample_num = self._get_sample_num(sample_id)
note_map = self._get_note_map()
for _, random_list in note_map:
for i, item in enumerate(random_list):
if item[0] == sample_num:
item[2] += shift_dB
transaction[self._get_conf_key('p_nm_note_map.json')] = note_map
hit_map = self._get_hit_map()
for _, random_list in hit_map:
for i, item in enumerate(random_list):
if item[0] == sample_num:
item[2] += shift_dB
transaction[self._get_conf_key('p_hm_hit_map.json')] = hit_map
prog_phase_count = 2 if normalise else 1
prog_start = prog_phase_count - 1
self._session.set_progress_position(prog_start / prog_phase_count)
# Write converted output
new_handle = WavPackWMem(freq, channels, use_float, bits)
if use_float:
for ch_num, ch in enumerate(data):
for i in range(len(ch)):
if (i & 0x3fff) == 0:
self._session.set_progress_position(
(prog_start + ((ch_num + i / sample_length) / channels)) /
prog_phase_count)
self._updater.signal_update('signal_progress_step')
yield
ch[i] *= mult
else:
for ch_num, ch in enumerate(data):
for i in range(len(ch)):
if (i & 0x3fff) == 0:
self._session.set_progress_position(
(prog_start + ((ch_num + i / sample_length) / channels)) /
prog_phase_count)
self._updater.signal_update('signal_progress_step')
yield
ch[i] = min(max(to_min, int(ch[i] * mult)), to_max)
new_handle.write(*data)
raw_data = new_handle.get_contents()
sample_data_key = self._get_full_sample_key(sample_id, 'p_sample.wv')
transaction[sample_data_key] = raw_data
def notifier(progress):
if progress == 1:
self._updater.signal_update('signal_progress_finished')
on_complete()
self._store.put(transaction, transaction_notifier=notifier)
def get_task_convert_sample_freq(self, sample_id, target_freq, on_complete):
# Get current data and format info
cur_handle = self._get_sample_data_handle(sample_id, convert_to_float=True)
channels = cur_handle.get_channels()
cur_freq = cur_handle.get_audio_rate()
cur_bits, cur_is_float = self.get_sample_format(sample_id) # original format
ratio = target_freq / cur_freq
# Get converted audio data
src = SampleRate(SRC_SINC_BEST_QUALITY, channels)
src.set_ratio(ratio)
self._session.set_progress_description('Resampling...')
self._session.set_progress_position(0)
self._updater.signal_update('signal_progress_start')
est_length = int(cur_handle.get_length() * ratio)
new_data = [[] for _ in range(channels)]
cur_data = cur_handle.read(4096)
while cur_data[0]:
self._session.set_progress_position(min(1, len(new_data[0]) / est_length))
self._updater.signal_update('signal_progress_step')
yield
next_data = cur_handle.read(4096)
src.add_input_data(*cur_data, end_of_input=not bool(next_data[0]))
resampled_chunk = src.get_output_data()
for ch in range(channels):
new_data[ch].extend(resampled_chunk[ch])
cur_data = next_data
new_length = len(new_data[0])
self._session.set_progress_position(1)
# Write new sample
new_handle = WavPackWMem(target_freq, channels, cur_is_float, cur_bits)
if not cur_is_float:
to_max = 2**(cur_bits - 1) - 1
to_min = -to_max - 1
mult = to_max
for ch in new_data:
for i in range(len(ch)):
ch[i] = min(max(to_min, int(ch[i] * mult)), to_max)
new_handle.write(*new_data)
raw_data = new_handle.get_contents()
sample_data_key = self._get_full_sample_key(sample_id, 'p_sample.wv')
new_header = self._get_sample_header(sample_id)
new_header['freq'] = target_freq
# Adjust loop bounds
if new_length == 0:
if 'loop_mode' in new_header:
new_header['loop_mode'] = 'off'
else:
if 'loop_start' in new_header:
target_start = int(round(new_header['loop_start'] * ratio))
new_header['loop_start'] = min(max(0, target_start), new_length - 1)
if 'loop_end' in new_header:
cur_loop_start = new_header.get('loop_start', 0)
target_end = int(round(new_header['loop_end'] * ratio))
new_header['loop_end'] = min(max(
cur_loop_start + 1, target_end), new_length)
sample_header_key = self._get_full_sample_key(sample_id, 'p_sh_sample.json')
transaction = {}
transaction[sample_header_key] = new_header
transaction[sample_data_key] = raw_data
def notifier(progress):
if progress == 1:
self._updater.signal_update('signal_progress_finished')
on_complete()
self._store.put(transaction, transaction_notifier=notifier)
def convert_sample_format(self, sample_id, bits, use_float, normalise):
# Get current format parameters
cur_handle = self._get_sample_data_handle(sample_id, convert_to_float=False)
channels = cur_handle.get_channels()
freq = cur_handle.get_audio_rate()
cur_bits = cur_handle.get_bits()
cur_is_float = cur_handle.is_float()
# Read sample data
data = [[] for _ in range(channels)]
chunk = cur_handle.read()
while chunk[0]:
for d, buf in zip(data, chunk):
d.extend(buf)
chunk = cur_handle.read()
# Get conversion ratio and bounds
from_max = 1 if cur_is_float else (2**31 - 1)
to_max = 1 if use_float else (2**(bits - 1) - 1)
to_min = -1 if use_float else (-to_max - 1)
mult = to_max / from_max
transaction = {}
if normalise:
# Normalise
max_abs = 0
for ch in data:
for item in ch:
max_abs = max(max_abs, abs(item))
norm_mult = from_max / max_abs
if norm_mult >= 1.01:
mult *= norm_mult
# Adjust sample volume levels in note and hit maps
shift_dB = -math.log(norm_mult, 2) * 6
sample_num = self._get_sample_num(sample_id)
note_map = self._get_note_map()
for _, random_list in note_map:
for i, item in enumerate(random_list):
if item[0] == sample_num:
item[2] += shift_dB
transaction[self._get_conf_key('p_nm_note_map.json')] = note_map
hit_map = self._get_hit_map()
for _, random_list in hit_map:
for i, item in enumerate(random_list):
if item[0] == sample_num:
item[2] += shift_dB
transaction[self._get_conf_key('p_hm_hit_map.json')] = hit_map
# Write converted output
new_handle = WavPackWMem(freq, channels, use_float, bits)
if use_float:
for ch in data:
for i in range(len(ch)):
ch[i] *= mult
else:
for ch in data:
for i in range(len(ch)):
ch[i] = min(max(to_min, int(ch[i] * mult)), to_max)
new_handle.write(*data)
raw_data = new_handle.get_contents()
sample_data_key = self._get_full_sample_key(sample_id, 'p_sample.wv')
transaction[sample_data_key] = raw_data
self._store.put(transaction)
def get_task_create_xfade_loop_region(self, sample_id, xfade_length, on_complete):
free_sample_ids = self.get_free_sample_ids()
if not free_sample_ids:
raise RuntimeError('No free sample slots left')
new_sample_id = free_sample_ids[0]
# Get sample info
header = self._get_sample_header(sample_id)
assert header['loop_mode'] == 'uni'
loop_start = header['loop_start']
loop_end = header['loop_end']
loop_length = loop_end - loop_start
assert xfade_length > 0
assert xfade_length <= loop_length
assert xfade_length <= loop_start
cur_handle = self._get_sample_data_handle(sample_id, convert_to_float=False)
channels = cur_handle.get_channels()
sample_length = cur_handle.get_length()
use_float = cur_handle.is_float()
bits = cur_handle.get_bits()
msg_fmt = 'Creating looping region...'
self._session.set_progress_description(msg_fmt)
self._session.set_progress_position(0)
self._updater.signal_update('signal_progress_start')
yield
# Set up progress update helper
step_count = 0
total_step_count = 4
if not use_float:
total_step_count = 5
def add_step():
nonlocal step_count
step_count += 1
self._session.set_progress_position(min(1, step_count / total_step_count))
self._updater.signal_update('signal_progress_step')
yield
# Get all sample data
orig_data = cur_handle.read()
yield from add_step()
# Make copies of relevant sections
init_length = loop_end - xfade_length
init_data = [d[:init_length] for d in orig_data]
fadeout_data = [d[init_length:loop_end] for d in orig_data]
fadein_data = [d[loop_start - xfade_length:loop_start] for d in orig_data]
trail_data = [d[loop_start:] for d in orig_data]
assert len(fadeout_data[0]) == len(fadein_data[0])
yield from add_step()
# Create crossfaded section
xfade_data = [[] for _ in orig_data]
for ch in range(channels):
fadein_ch = fadein_data[ch]
fadeout_ch = fadeout_data[ch]
for i, (in_item, out_item) in enumerate(zip(fadein_ch, fadeout_ch)):
t = i / xfade_length
diff = in_item - out_item
xfade_item = out_item + t * diff
xfade_data[ch].append(xfade_item)
yield from add_step()
# Scale integer contents
if not use_float:
shift = 32 - bits
if shift > 0:
for init_ch in init_data:
for i in range(len(init_ch)):
init_ch[i] >>= shift
for trail_ch in trail_data:
for i in range(len(trail_ch)):
trail_ch[i] >>= shift
val_max = 2**(bits - 1) - 1
val_min = -val_max - 1
for xfade_ch in xfade_data:
for i in range(len(xfade_ch)):
shifted = int(xfade_ch[i]) >> shift
xfade_ch[i] = min(max(val_min, shifted), val_max)
yield from add_step()
# Write new sections
new_handle = WavPackWMem(cur_handle.get_audio_rate(), channels, use_float, bits)
new_handle.write(*init_data)
new_handle.write(*xfade_data)
new_handle.write(*trail_data)
yield from add_step()
new_name_key = self._get_full_sample_key(new_sample_id, 'm_name.json')
new_name = self.get_sample_name(sample_id) + ' – xfade'
new_header = deepcopy(header)
new_header_key = self._get_full_sample_key(new_sample_id, 'p_sh_sample.json')
raw_data = new_handle.get_contents()
sample_data_key = self._get_full_sample_key(new_sample_id, 'p_sample.wv')
transaction = {
new_name_key: new_name,
new_header_key: new_header,
sample_data_key: raw_data,
}
def notifier(progress):
if progress == 1:
self._updater.signal_update('signal_progress_finished')
on_complete()
self._store.put(transaction, transaction_notifier=notifier)
def get_task_convert_sample_format(
self, sample_id, bits, use_float, normalise, on_complete):
# Get current format parameters
cur_handle = self._get_sample_data_handle(sample_id, convert_to_float=False)
channels = cur_handle.get_channels()
freq = cur_handle.get_audio_rate()
cur_bits = cur_handle.get_bits()
cur_is_float = cur_handle.is_float()
sample_length = cur_handle.get_length()
self._session.set_progress_description('Converting sample format...')
self._session.set_progress_position(0)
self._updater.signal_update('signal_progress_start')
yield
# Read sample data
data = [[] for _ in range(channels)]
chunk = cur_handle.read()
while len(chunk[0]) > 0:
for d, buf in zip(data, chunk):
d.extend(buf)
chunk = cur_handle.read()
# Get conversion ratio and bounds
from_max = 1 if cur_is_float else (2**31 - 1)
to_max = 1 if use_float else (2**(bits - 1) - 1)
to_min = -1 if use_float else (-to_max - 1)
mult = to_max / from_max
transaction = {}
if normalise:
# Normalise
max_abs = 0
for ch_num, ch in enumerate(data):
for i, item in enumerate(ch):
if (i & 0x3fff) == 0:
self._session.set_progress_position(
((ch_num + i / sample_length) / channels) * 0.5)
self._updater.signal_update('signal_progress_step')
yield
max_abs = max(max_abs, abs(item))
norm_mult = from_max / max_abs
if (norm_mult >= 1.01) or (norm_mult <= 0.99999):
mult *= norm_mult
# Adjust sample volume levels in note and hit maps
shift_dB = -math.log(norm_mult, 2) * 6
sample_num = self._get_sample_num(sample_id)
note_map = self._get_note_map()
for _, random_list in note_map:
for i, item in enumerate(random_list):
if item[0] == sample_num:
item[2] += shift_dB
transaction[self._get_conf_key('p_nm_note_map.json')] = note_map
hit_map = self._get_hit_map()
for _, random_list in hit_map:
for i, item in enumerate(random_list):
if item[0] == sample_num:
item[2] += shift_dB
transaction[self._get_conf_key('p_hm_hit_map.json')] = hit_map
prog_phase_count = 2 if normalise else 1
prog_start = prog_phase_count - 1
self._session.set_progress_position(prog_start / prog_phase_count)
# Write converted output
new_handle = WavPackWMem(freq, channels, use_float, bits)
if use_float:
for ch_num, ch in enumerate(data):
for i in range(len(ch)):
if (i & 0x3fff) == 0:
self._session.set_progress_position(
(prog_start + ((ch_num + i / sample_length) / channels)) /
prog_phase_count)
self._updater.signal_update('signal_progress_step')
yield
ch[i] *= mult
else:
for ch_num, ch in enumerate(data):
for i in range(len(ch)):
if (i & 0x3fff) == 0:
self._session.set_progress_position(
(prog_start + ((ch_num + i / sample_length) / channels)) /
prog_phase_count)
self._updater.signal_update('signal_progress_step')
yield
ch[i] = min(max(to_min, int(ch[i] * mult)), to_max)
new_handle.write(*data)
raw_data = new_handle.get_contents()
sample_data_key = self._get_full_sample_key(sample_id, 'p_sample.wv')
transaction[sample_data_key] = raw_data
def notifier(progress):
if progress == 1:
self._updater.signal_update('signal_progress_finished')
on_complete()
self._store.put(transaction, transaction_notifier=notifier)
def get_task_convert_sample_freq(self, sample_id, target_freq, on_complete):
# Get current data and format info
cur_handle = self._get_sample_data_handle(sample_id, convert_to_float=True)
channels = cur_handle.get_channels()
cur_freq = cur_handle.get_audio_rate()
cur_bits, cur_is_float = self.get_sample_format(sample_id) # original format
ratio = target_freq / cur_freq
# Get converted audio data
src = SampleRate(SRC_SINC_BEST_QUALITY, channels)
src.set_ratio(ratio)
self._session.set_progress_description('Resampling...')
self._session.set_progress_position(0)
self._updater.signal_update('signal_progress_start')
est_length = int(cur_handle.get_length() * ratio)
new_data = [[] for _ in range(channels)]
cur_data = cur_handle.read(4096)
while cur_data[0]:
self._session.set_progress_position(min(1, len(new_data[0]) / est_length))
self._updater.signal_update('signal_progress_step')
yield
next_data = cur_handle.read(4096)
src.add_input_data(*cur_data, end_of_input=not bool(next_data[0]))
resampled_chunk = src.get_output_data()
for ch in range(channels):
new_data[ch].extend(resampled_chunk[ch])
cur_data = next_data
new_length = len(new_data[0])
self._session.set_progress_position(1)
# Write new sample
new_handle = WavPackWMem(target_freq, channels, cur_is_float, cur_bits)
if not cur_is_float:
to_max = 2**(cur_bits - 1) - 1
to_min = -to_max - 1
mult = to_max
for ch in new_data:
for i in range(len(ch)):
ch[i] = min(max(to_min, int(ch[i] * mult)), to_max)
new_handle.write(*new_data)
raw_data = new_handle.get_contents()
sample_data_key = self._get_full_sample_key(sample_id, 'p_sample.wv')
new_header = self._get_sample_header(sample_id)
new_header['freq'] = target_freq
# Adjust loop bounds
if new_length == 0:
if 'loop_mode' in new_header:
new_header['loop_mode'] = 'off'
else:
if 'loop_start' in new_header:
target_start = int(round(new_header['loop_start'] * ratio))
new_header['loop_start'] = min(max(0, target_start), new_length - 1)
if 'loop_end' in new_header:
cur_loop_start = new_header.get('loop_start', 0)
target_end = int(round(new_header['loop_end'] * ratio))
new_header['loop_end'] = min(max(
cur_loop_start + 1, target_end), new_length)
sample_header_key = self._get_full_sample_key(sample_id, 'p_sh_sample.json')
transaction = {}
transaction[sample_header_key] = new_header
transaction[sample_data_key] = raw_data
def notifier(progress):
if progress == 1:
self._updater.signal_update('signal_progress_finished')
on_complete()
self._store.put(transaction, transaction_notifier=notifier)