def encode(self, uncompressed):
"""perform compression
params:
uncompressed: np.ndarray - the data to be compressed
"""
uncompressed_lp = None
compressed_lp = None
try:
uncompressed_lp = pressio.io_data_from_numpy(uncompressed)
compressed_lp = pressio.data_new_empty(pressio.byte_dtype,
pressio.vector_uint64_t())
rc = pressio.compressor_compress(self._compressor, uncompressed_lp,
compressed_lp)
if rc:
raise PressioException.from_compressor(self._compressor)
comp = pressio.io_data_to_bytes(compressed_lp)
finally:
pressio.data_free(uncompressed_lp)
pressio.data_free(compressed_lp)
return comp
pressio.compressor_check_options(compressor, sz_options)
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)