def test_same_data_as_flac_file_using_as_array(pyogg_config):
import numpy # type: ignore
# Load the demonstration file that is exactly 5 seconds long
filename = str(pyogg_config.rootdir / "examples/left-right-demo-5s.flac")
# Open the file using FlacFile to read the entire file into memory
flac_file = pyogg.FlacFile(filename)
# Open the file (again) using FlacFileStream, which does not read
# the entire file immediately.
flac_stream = pyogg.FlacFileStream(filename)
# Loop through the FlacFileStream until we've read all the data
buf_all = None
while True:
# Read the next part of the stream
buf = flac_stream.get_buffer_as_array()
# Check if we've reached the end of the stream
if buf is None:
break
# Add the bytes we've read to buf_all. Note that this
# technique isn't efficient and shouldn't be used in
# production code.
if buf_all is None:
buf_all = buf
else:
buf_all = numpy.concatenate((buf_all, buf))
# Check that every byte is identical for both buffers
assert numpy.all(buf_all == flac_file.as_array())
def test_same_data_as_flac_file(pyogg_config) -> None:
# Load the demonstration file that is exactly 5 seconds long
filename = str(pyogg_config.rootdir / "examples/left-right-demo-5s.flac")
# Open the file using FlacFile to read the entire file into memory
flac_file = pyogg.FlacFile(filename)
# Open the file (again) using FlacFileStream, which does not read
# the entire file immediately.
flac_stream = pyogg.FlacFileStream(filename)
# Loop through the FlacFileStream until we've read all the data
buf_all = bytes()
while True:
# Read the next part of the stream
buf = flac_stream.get_buffer()
# Check if we've reached the end of the stream
if buf is None:
break
# Add the bytes we've read to buf_all. Note that this
# technique isn't efficient and shouldn't be used in
# production code.
buf_all += buf
assert buf_all == bytes(flac_file.buffer)
def test_output_via_wav():
# Load the demonstration file that is exactly 5 seconds long
filename = "../examples/left-right-demo-5s.flac"
flac_file = pyogg.FlacFile(filename)
import wave
wave_out = wave.open("test_flac_file__test_output_via_wav.wav", "wb")
wave_out.setnchannels(flac_file.channels)
wave_out.setsampwidth(flac_file.bytes_per_sample)
wave_out.setframerate(flac_file.frequency)
wave_out.writeframes(flac_file.buffer)
def test_as_array():
# Load the demonstration file that is exactly 5 seconds long
filename = "../examples/left-right-demo-5s.flac"
flac_file = pyogg.FlacFile(filename)
# Test that the loaded file is indeed 5 seconds long (using
# as_array())
expected_duration_seconds = 5
samples_per_second = flac_file.frequency
expected_duration_samples = (expected_duration_seconds *
samples_per_second)
duration_samples = flac_file.as_array().shape[0]
assert duration_samples == expected_duration_samples
def test_as_bytes():
# Load the demonstration file that is exactly 5 seconds long
filename = "../examples/left-right-demo-5s.flac"
flac_file = pyogg.FlacFile(filename)
# Test that the loaded file is indeed 5 seconds long (using
# the buffer member variable)
expected_duration_seconds = 5
samples_per_second = flac_file.frequency
channels = flac_file.channels
bytes_per_sample = flac_file.bytes_per_sample
expected_duration_bytes = (expected_duration_seconds * samples_per_second *
bytes_per_sample * channels)
duration_bytes = len(flac_file.buffer)
assert duration_bytes == expected_duration_bytes
def test_output_via_wav(pyogg_config) -> None:
# Load the demonstration file that is exactly 5 seconds long
filename = str(pyogg_config.rootdir / "examples/left-right-demo-5s.flac")
flac_file = pyogg.FlacFile(filename)
import wave
out_filename = str(
pyogg_config.outdir
/ "test_flac_file__test_output_via_wav.wav"
)
wave_out = wave.open(
out_filename,
"wb"
)
wave_out.setnchannels(flac_file.channels)
wave_out.setsampwidth(flac_file.bytes_per_sample)
wave_out.setframerate(flac_file.frequency)
wave_out.writeframes(flac_file.buffer)
def test_error_in_filename() -> None:
# Load a non-existant file
filename = "does-not-exist.flac"
with pytest.raises(pyogg.PyOggError):
flac_file = pyogg.FlacFile(filename)
# 960000
# Shape of numpy array (number of samples per channel, number of channels):
# (240000, 2)
#
# Playing...
# Finished.
import pyogg
import simpleaudio # type: ignore
# Specify the filename to read
filename = "left-right-demo-5s.flac"
# Read the file using FlacFile
print("Reading Ogg Flac file...")
flac_file = pyogg.FlacFile(filename)
# Display summary information about the audio
print("\nRead Ogg Flac file")
print("Channels:\n ", flac_file.channels)
print("Frequency (samples per second):\n ", flac_file.frequency)
print("Buffer Length (bytes):\n ", len(flac_file.buffer))
# Get the data as a NumPy array
buf = flac_file.as_array()
# The shape of the array can be read as
# "(number of samples per channel, number of channels)".
print(
"Shape of numpy array (number of samples per channel, " +
"number of channels):\n ", buf.shape)
