forked from platypush/platypush
Basic support for synth sounds in sound plugin
This commit is contained in:
Fabio Manganiello
parent
00dacc456c
commit
7a5657778e
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@ -2,6 +2,8 @@
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.. moduleauthor:: Fabio Manganiello <blacklight86@gmail.com>
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"""
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import json
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import math
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import os
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import queue
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import tempfile
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@ -25,6 +27,131 @@ class RecordingState(Enum):
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PAUSED='PAUSED'
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class Sound(object):
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"""
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Class model a synthetic sound that can be played through the audio device
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"""
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STANDARD_A_FREQUENCY = 440.0
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STANDARD_A_MIDI_NOTE = 69
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_DEFAULT_BLOCKSIZE = 2048
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_DEFAULT_BUFSIZE = 20
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_DEFAULT_SAMPLERATE = 44100
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midi_note = None
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frequency = None
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gain = 1.0
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duration = None
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def __init__(self, midi_note=midi_note, frequency=None, gain=gain,
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duration=duration, A_frequency=STANDARD_A_FREQUENCY):
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"""
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You can construct a sound either from a MIDI note or a base frequency
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:param midi_note: MIDI note code, see
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https://newt.phys.unsw.edu.au/jw/graphics/notes.GIF
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:type midi_note: int
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:param frequency: Sound base frequency in Hz
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:type frequency: float
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:param gain: Note gain/volume between 0.0 and 1.0 (default: 1.0)
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:type gain: float
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:param duration: Note duration in seconds. Default: keep until
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release/pause/stop
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:type duration: float
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:param A_frequency: Reference A4 frequency (default: 440 Hz)
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:type A_frequency: float
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"""
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if midi_note and frequency:
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raise RuntimeError('Please specify either a MIDI note or a base ' +
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'frequency')
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# TODO support for multiple notes/frequencies, either for chords or
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# harmonics
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if midi_note:
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self.midi_note = midi_note
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self.frequency = self.note_to_freq(midi_note=midi_note,
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A_frequency=A_frequency)
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elif frequency:
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self.frequency = frequency
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self.midi_note = self.freq_to_note(frequency=frequency,
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A_frequency=A_frequency)
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else:
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raise RuntimeError('Please specify either a MIDI note or a base ' +
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'frequency')
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self.gain = gain
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self.duration = duration
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@classmethod
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def note_to_freq(cls, midi_note, A_frequency=STANDARD_A_FREQUENCY):
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"""
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Converts a MIDI note to its frequency in Hz
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:param midi_note: MIDI note to convert
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:type midi_note: int
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:param A_frequency: Reference A4 frequency (default: 440 Hz)
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:type A_frequency: float
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"""
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return (2.0 ** ((midi_note - cls.STANDARD_A_MIDI_NOTE) / 12.0)) \
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* A_frequency
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@classmethod
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def freq_to_note(cls, frequency, A_frequency=STANDARD_A_FREQUENCY):
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"""
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Converts a frequency in Hz to its closest MIDI note
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:param frequency: Frequency in Hz
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:type midi_note: float
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:param A_frequency: Reference A4 frequency (default: 440 Hz)
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:type A_frequency: float
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"""
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# TODO return also the offset in % between the provided frequency
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# and the standard MIDI note frequency
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return int(12.0 * math.log(frequency/A_frequency, 2)
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+ cls.STANDARD_A_MIDI_NOTE)
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def get_wave(self, t_start=0., t_end=0., samplerate=_DEFAULT_SAMPLERATE):
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"""
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Get the wave binary data associated to this sound
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:param t_start: Start offset for the sine wave in seconds. Default: 0
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:type t_start: float
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:param t_end: End offset for the sine wave in seconds. Default: 0
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:type t_end: float
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:param samplerate: Audio sample rate. Default: 44100 Hz
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:type samplerate: int
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:returns: A numpy.ndarray[n,1] with the raw float values
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"""
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import numpy as np
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x = np.linspace(t_start, t_end, int((t_end-t_start)*samplerate))
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x = x.reshape(len(x), 1)
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return self.gain * np.sin(2 * np.pi * self.frequency * x)
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def __str__(self):
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return json.dumps({
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'midi_note': midi_note,
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'frequency': frequency,
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'gain': gain,
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'duration': duration,
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})
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class SoundPlugin(Plugin):
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"""
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Plugin to interact with a sound device.
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@ -36,13 +163,10 @@ class SoundPlugin(Plugin):
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* **numpy** (``pip install numpy``)
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"""
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_DEFAULT_BLOCKSIZE = 2048
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_DEFAULT_BUFSIZE = 20
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def __init__(self, input_device=None, output_device=None,
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input_blocksize=_DEFAULT_BLOCKSIZE,
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output_blocksize=_DEFAULT_BLOCKSIZE,
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playback_bufsize=_DEFAULT_BUFSIZE, *args, **kwargs):
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input_blocksize=Sound._DEFAULT_BLOCKSIZE,
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output_blocksize=Sound._DEFAULT_BLOCKSIZE,
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playback_bufsize=Sound._DEFAULT_BUFSIZE, *args, **kwargs):
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"""
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:param input_device: Index or name of the default input device. Use :method:`platypush.plugins.sound.query_devices` to get the available devices. Default: system default
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:type input_device: int or str
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@ -135,37 +259,73 @@ class SoundPlugin(Plugin):
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@action
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def play(self, file, device=None, blocksize=None, bufsize=_DEFAULT_BUFSIZE):
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def play(self, file=None, sounds=None, device=None, blocksize=None,
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bufsize=Sound._DEFAULT_BUFSIZE, samplerate=None, channels=None):
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"""
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Plays a sound file (support formats: wav, raw)
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Plays a sound file (support formats: wav, raw) or a synthetic sound.
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:param file: Sound file
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:param file: Sound file path. Specify this if you want to play a file
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:type file: str
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:param device: Output device (default: default configured device or system default audio output if not configured)
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:param sounds: Sounds to play. Specify this if you want to play
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synthetic sounds. TODO: So far only one single-frequency sound is
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supported, support for multiple sounds, chords, harmonics and mixed
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sounds is ont the way.
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:type sounds: list[Sound]. You can initialize it either from a list
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of `Sound` objects or from its JSON representation, e.g.:
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[
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{
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"midi_note": 69, # 440 Hz A
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"gain": 1.0, # Maximum volume
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"duration": 1.0 # 1 second or until release/pause/stop
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}
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]
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:param device: Output device (default: default configured device or
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system default audio output if not configured)
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:type device: int or str
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:param blocksize: Audio block size (default: configured `output_blocksize` or 2048)
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:param blocksize: Audio block size (default: configured
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`output_blocksize` or 2048)
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:type blocksize: int
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:param bufsize: Size of the audio buffer (default: 20)
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:type bufsize: int
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:param samplerate: Audio samplerate. Default: audio file samplerate if
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in file mode, 44100 Hz if in synth mode
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:type samplerate: int
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:param channels: Number of audio channels. Default: number of channels
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in the audio file in file mode, 1 if in synth mode
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:type channels: int
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"""
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if not file and not sounds:
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raise RuntimeError('Please specify either a file to play or a ' +
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'list of sound objects')
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import sounddevice as sd
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if self._get_playback_state() != PlaybackState.STOPPED:
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self.stop_playback()
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time.sleep(2)
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if file:
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self.logger.info('Stopping playback before playing')
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self.stop_playback()
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time.sleep(2)
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if blocksize is None:
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blocksize = self.output_blocksize
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self.playback_paused_changed.clear()
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q = queue.Queue(maxsize=bufsize)
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completed_callback_event = Event()
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file = os.path.abspath(os.path.expanduser(file))
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q = queue.Queue(maxsize=bufsize)
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f = None
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t = 0.
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if file:
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file = os.path.abspath(os.path.expanduser(file))
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if device is None:
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device = self.output_device
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@ -182,7 +342,7 @@ class SoundPlugin(Plugin):
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assert frames == blocksize
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if status.output_underflow:
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self.logger.warning('Output underflow: increase blocksize?')
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outdata = b'\x00' * len(outdata)
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outdata = (b'\x00' if file else 0.) * len(outdata)
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return
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assert not status
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@ -195,59 +355,118 @@ class SoundPlugin(Plugin):
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if len(data) < len(outdata):
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outdata[:len(data)] = data
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outdata[len(data):] = b'\x00' * (len(outdata) - len(data))
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raise sd.CallbackStop
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outdata[len(data):] = (b'\x00' if file else 0.) * \
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(len(outdata) - len(data))
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# if f:
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# raise sd.CallbackStop
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else:
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outdata[:] = data
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try:
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import soundfile as sf
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if file:
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import soundfile as sf
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f = sf.SoundFile(file)
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with sf.SoundFile(file) as f:
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self.start_playback()
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self.logger.info('Started playback of [{}] to device [{}]'.
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format(file, device))
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if not samplerate:
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samplerate = f.samplerate if f else Sound._DEFAULT_SAMPLERATE
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for _ in range(bufsize):
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if not channels:
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channels = f.channels if f else 1
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self.start_playback()
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self.logger.info('Started playback of {} to device [{}]'.
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format(file or sounds, device))
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if sounds:
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if isinstance(sounds, str):
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sounds = json.loads(sounds)
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for i in range(0, len(sounds)):
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if isinstance(sounds[i], dict):
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sounds[i] = Sound(**(sounds[i]))
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# Audio queue pre-fill loop
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for _ in range(bufsize):
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if f:
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data = f.buffer_read(blocksize, dtype='float32')
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if not data:
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break
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else:
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# TODO support for multiple sounds or mixed sounds
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sound = sounds[0]
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blocktime = float(blocksize / samplerate)
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next_t = min(t+blocktime, sound.duration) \
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if sound.duration is not None else t+blocktime
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data = sound.get_wave(t_start=t, t_end=next_t,
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samplerate=samplerate)
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t = next_t
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if sound.duration is not None and t >= sound.duration:
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break
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while self._get_playback_state() == PlaybackState.PAUSED:
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self.playback_paused_changed.wait()
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if self._get_playback_state() == PlaybackState.STOPPED:
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raise sd.CallbackAbort
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q.put_nowait(data) # Pre-fill the audio queue
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streamtype = sd.RawOutputStream if file else sd.OutputStream
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stream = streamtype(samplerate=samplerate, blocksize=blocksize,
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device=device, channels=channels,
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dtype='float32', callback=audio_callback,
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finished_callback=completed_callback_event.set)
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with stream:
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# Timeout set until we expect all the buffered blocks to
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# be consumed
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timeout = blocksize * bufsize / samplerate
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while True:
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while self._get_playback_state() == PlaybackState.PAUSED:
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self.playback_paused_changed.wait()
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if f:
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data = f.buffer_read(blocksize, dtype='float32')
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if not data:
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break
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else:
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# TODO support for multiple sounds or mixed sounds
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sound = sounds[0]
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blocktime = float(blocksize / samplerate)
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next_t = min(t+blocktime, sound.duration) \
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if sound.duration is not None else t+blocktime
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data = sound.get_wave(t_start=t, t_end=next_t,
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samplerate=samplerate)
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t = next_t
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if sound.duration is not None and t >= sound.duration:
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break
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if self._get_playback_state() == PlaybackState.STOPPED:
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raise sd.CallbackAbort
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q.put_nowait(data)
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try:
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q.put(data, timeout=timeout)
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except queue.Full as e:
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if self._get_playback_state() != PlaybackState.PAUSED:
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raise e
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stream = sd.RawOutputStream(
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samplerate=f.samplerate, blocksize=blocksize,
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device=device, channels=f.channels, dtype='float32',
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callback=audio_callback,
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finished_callback=completed_callback_event.set)
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with stream:
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timeout = blocksize * bufsize / f.samplerate
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while data:
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while self._get_playback_state() == PlaybackState.PAUSED:
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self.playback_paused_changed.wait()
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data = f.buffer_read(blocksize, dtype='float32')
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if self._get_playback_state() == PlaybackState.STOPPED:
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raise sd.CallbackAbort
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try:
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q.put(data, timeout=timeout)
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except queue.Full as e:
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if self._get_playback_state() != PlaybackState.PAUSED:
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raise e
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completed_callback_event.wait()
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completed_callback_event.wait()
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# if sounds:
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# sd.wait()
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except queue.Full as e:
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self.logger.warning('Playback timeout: audio callback failed?')
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finally:
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if f and not f.closed:
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f.close()
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f = None
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self.stop_playback()
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@ -297,6 +516,7 @@ class SoundPlugin(Plugin):
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dir='')
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if os.path.isfile(file):
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self.logger.info('Removing existing audio file {}'.format(file))
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os.unlink(file)
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if device is None:
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