def decode(self, compressed, decompressed=None):
"""perform decompression
params:
compressed: bytes - the data to be decompressed
decompressed: numpy.ndarray - memory to be used to decompress data into
"""
compressed_lp = None
decompressed_lp = None
try:
compressed_lp = pressio.io_data_from_bytes(compressed)
decompressed_lp = pressio.io_data_from_numpy(decompressed)
rc = pressio.compressor_decompress(self._compressor, compressed_lp,
decompressed_lp)
if rc:
raise PressioException.from_compressor(self._compressor)
dec = pressio.io_data_to_numpy(decompressed_lp)
if decompressed is not None:
return dec
else:
return ndarray_copy(dec, decompressed)
finally:
pressio.data_free(compressed_lp)
pressio.data_free(decompressed_lp)
pressio.compressor_set_options(compressor, sz_options)
pressio.compressor_set_metrics(compressor, metrics)
input_data = pressio.io_data_from_numpy(floatArray)
compressed_data = pressio.data_new_empty(pressio.byte_dtype,
pressio.vector_uint64_t())
dims = pressio.vector_uint64_t([height, width, 3])
decompressed_data = pressio.data_new_empty(pressio.double_dtype, dims)
#compress data with selected compressor
pressio.compressor_compress(compressor, input_data, compressed_data)
#decompress data with selected compressor
pressio.compressor_decompress(compressor, compressed_data,
decompressed_data)
#get metric results for compression
metric_results = pressio.compressor_get_metrics_results(compressor)
#Grab relevant compression metrics
compression_ratio = pressio.new_double()
compressed_size = pressio.new_uint32()
uncompressed_size = pressio.new_uint32()
decompressed_size = pressio.new_uint32()
pressio.options_get_double(metric_results, b"size:compression_ratio",
compression_ratio)
pressio.options_get_uinteger(metric_results, b"size:compressed_size",
compressed_size)
pressio.options_get_uinteger(metric_results, b"size:uncompressed_size",
uncompressed_size)
pressio.options_get_uinteger(metric_results, b"size:decompressed_size",
