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127 lines (94 loc) · 3.21 KB
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# Copyright 2018-2021 Streamlit Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
import io
import streamlit as st
import numpy as np
import wave
from scipy.io import wavfile
st.title("Audio test")
st.header("Local file")
# These are the formats supported in Streamlit right now.
AUDIO_EXTENSIONS = ["wav", "flac", "mp3", "aac", "ogg", "oga", "m4a", "opus", "wma"]
# For samples of sounds in different formats, see
# https://docs.espressif.com/projects/esp-adf/en/latest/design-guide/audio-samples.html
def get_audio_files_in_dir(directory):
out = []
for item in os.listdir(directory):
try:
name, ext = item.split(".")
except:
continue
if name and ext:
if ext in AUDIO_EXTENSIONS:
out.append(item)
return out
avdir = os.path.expanduser("~")
audiofiles = get_audio_files_in_dir(avdir)
if len(audiofiles) == 0:
st.write(
"Put some audio files in your home directory (%s) to activate this player."
% avdir
)
else:
filename = st.selectbox(
"Select an audio file from your home directory (%s) to play" % avdir,
audiofiles,
0,
)
audiopath = os.path.join(avdir, filename)
st.audio(audiopath)
st.header("Generated audio (440Hz sine wave)")
def note(freq, length, amp, rate):
t = np.linspace(0, length, length * rate)
data = np.sin(2 * np.pi * freq * t) * amp
return data.astype(np.int16)
frequency = 440 # hertz
nchannels = 1
sampwidth = 2
sampling_rate = 44100
duration = 89 # Max size, given the bitrate and sample width
comptype = "NONE"
compname = "not compressed"
amplitude = 10000
nframes = duration * sampling_rate
x = st.text("Making wave...")
sine_wave = note(frequency, duration, amplitude, sampling_rate)
fh = wave.open("sound.wav", "w")
fh.setparams((nchannels, sampwidth, int(sampling_rate), nframes, comptype, compname))
x.text("Converting wave...")
fh.writeframes(sine_wave)
fh.close()
with io.open("sound.wav", "rb") as f:
x.text("Sending wave...")
x.audio(f)
st.header("Audio from a Remote URL")
def shorten_audio_option(opt):
return opt.split("/")[-1]
song = st.selectbox(
"Pick an MP3 to play",
(
"https://www.soundhelix.com/examples/mp3/SoundHelix-Song-1.mp3",
"https://www.soundhelix.com/examples/mp3/SoundHelix-Song-3.mp3",
"https://www.soundhelix.com/examples/mp3/SoundHelix-Song-8.mp3",
),
0,
shorten_audio_option,
)
st.audio(song)
st.title("Streaming audio from a URL")
st.write("[MP3: Mutiny Radio](http://nthmost.net:8000/mutiny-studio)")
st.audio("http://nthmost.net:8000/mutiny-studio")
st.write("[OGG: Radio Loki](http://nthmost.net:8000/loki.ogg)")
st.audio("http://nthmost.net:8000/loki.ogg")