Access to Current Music Data?

[snerp]

I'm wondering about building a Music + video art project where the video is dynamically generated based on the audio. So I was wondering, is there a way for me to poll data from the sound buffer?

Basically I want to do:

// Declare a new music
sf::Music music;
// Open it from an audio file
if (!music.openFromFile("music.ogg"))
{
    // error...
}
// Change some parameters
music.setLoop(true);         // make it loop
// Play it
music.play();

And then every frame I want to check what the music has done since last frame. Does SFML have a way to do this? I assume it does since the audio module seems pretty powerful and people are recording audio with it?
Basically, think Audiosurf, I want to use the waveform to find the pitch and volume to use as inputs to generate visuals instead of a track.

Edit: some more info.

Basically, the part I'm having a problem with is accessing the sound data, also I'm not sure what format it's going to be in.

[Hapax]

sf::Music does not give you the ability to access the samples that it uses.
You can build your own music class from sf::SoundStream (as sf::Music does) that does what you need but it should be possible to inherit from sf::Music to provide a way to access those samples, although copying or altering sf::Music might be simpler/easier.