I look at this:

sp_rv
sp_generate_signature (sp_audio_info_t * song_audio_format,
sp_signature_t * signature,
guint (*get_pcm_data) (guint sample_offset,
guint num_samples,
guchar * output_buf,
void *user_data),
void *user_data)

and it makes my heart hurt. I'm so glad I only visit C world long enough to port it to Java world.

Then again, in the source to javazoom, a pure java MP3 decoder, there exists the line:

fs = (fs>32767.0f ? 32767.0f : (fs < -32767.0f ? -32767.0f : fs));

the ?: operator is the devil.