audio_display module hooks 
 - These hooks allow modules to override the default audio player.

hook_audio_display_list
  Parameters:
    none
  Returns:
    array(
      'module_name' => array(
        'name' => string - human-readable name
      )
    )
  Description:
    Describe this module for audio_display parent module

hook_audio_display_admin
  Parameters:
    none
  Returns:
    array() - per forms API
  Description
    Return form elements for managing this module from manage/playlist/settings

hook_audio_display_admin_validate
  Parameters:
    $form => array() - per forms API
    &$form_state => array() - per forms API
  Returns:
    none
  Description:
    Form validation for hook_audio_display_admin.

hook_audio_display_admin_submit
  Parameters:
    $form => array() - per forms API
    &$form_state => array() - per forms API
  Returns:
    none
  Description:
    Form submission for hook_audio_display_admin.

hook_audio_display_launch_button
  Parameters:
    $url_only => bool - just return a url instead of a full link
  Returns:
    string of valid HTML
  Description:
    Generates the HTML for the button to launch the audio player. Only needs to be implemented for modules that are different from the default.
  Notes:
    Called by audio_display_button()

hook_audio_display_player
  Parameters:
    $inc_headers => bool - include HTML headers and footers
  Returns:
    string of valid HTML
  Description:
    Generates the HTML to display the audio player. Primarily referenced in audio_player

hook_audio_display_player_embed
  Parameters:
    $inc_headers => bool - include HTML headers and footers
  Returns:
    string of valid HTML
  Description:
    Generates an iFrameable version of the audio player (for embedding on other pages)

hook_audio_display_player_small
  Parameters:
    $node => a loaded node or a node id
  Returns:
    string of valid HTML
  Description:
    Generates the HTML to display an icon-sized audio player. Do not implement this in modules that don't support an icon-sized player

hook_audio_display_player_single_seek
  Parameters:
    $node =
> a loaded node or a node id
  Returns:
    string of valid HTML
  Description:
    Generates the HTML to display a small audio player with seek capabilities. Do not implement this in modules that don't support an icon-sized player