Audio sinks

The spotify.audiosink module provides audio sink wrappers for different audio sinks like ALSA, OSS, and PortAudio.

spotify.audiosink.import_audio_sink(audio_sinks=None)

Try to import each audio sink until one is successfully imported.

The audio_sinks parameter specificies what audio sinks to import, in the given order. If audio_sinks is not provided, the list spotify.audiosink.AUDIO_SINKS will be used.

Parameters:audio_sinks (list of two-tuples of (modulename, classname)) – audio sinks to try to import Returns:the first audio sink that was successfully imported Return type:class Raise :ImportError if no audio sinks can be imported

class spotify.audiosink.BaseAudioSink(backend=None)

BaseAudioSink provides the interface which is implemented by all audio sink wrappers in the spotify.audiosink module.

The interface is a perfect match for the spotify.manager.SpotifySessionManager.music_delivery() method, making it easy to play audio data received from Spotify.

music_delivery(session, frames, frame_size, num_frames, sample_type, sample_rate, channels)

To use one of the bundled audio controllers in a Spotify client you develop, just call this method every time you get audio data from Spotify, e.g. from your implementation of spotify.manager.SpotifySessionManager.music_delivery().

Parameters:

• session (spotify.Session) – the current session
• frames (buffer) – the audio data
• frame_size (int) – bytes per frame
• num_frames (int) – number of frames in this delivery
• sample_type (int) – currently this is always 0 which means 16-bit signed native endian integer samples
• sample_rate (int) – audio sample rate, in samples per second
• channels (int) – number of audio channels. Currently 1 or 2

Returns:

number of frames consumed

Return type:

int

start()

Should be called when audio output starts.

This is a hook for the audio sink to do work just before the audio starts.

stop()

Should be called when audio output stops.

This is a hook for the audio sink to do work just after the audio stops.

pause()

Should be called when audio output is paused.

This is a hook for the audio sink to do work when the audio is paused.

Implementations

Implementations of the BaseAudioSink interface include:

class spotify.audiosink.alsa.AlsaSink

Requires a system using ALSA, which includes most Linux systems, and the pyalsaaudio library.

class spotify.audiosink.oss.OssSink

Requires a system using OSS or with an OSS emulation, typically a Linux or BSD system. Uses the ossaudiodev module from the Python standard library.

class spotify.audiosink.portaudio.PortAudioSink

Requires a system with the PortAudio library installed and the Python binding pyaudio. The PortAudio library is available for both Linux, Mac OS X, and Windows.

class spotify.audiosink.gstreamer.GstreamerSink

Requires a system with Gstreamer installed and the Python bindings gst-python. The Gstreamer library is available for both Linux, Mac OS X, and Windows. Though, it isn’t always trivial to install Gstreamer.