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;;; pulse-audio.el --- Control audio with Elisp -*- lexical-binding: t -*-

;; Author: William Carroll <wpcarro@gmail.com>
;; Version: 0.0.1
;; Package-Requires: ((emacs "24"))
;; Homepage: https://user.git.corp.google.com/wpcarro/briefcase

;;; Commentary:
;; Because everything in my configuration is turning into Elisp these days.

;;; Code:

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;; Dependencies
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(require 'prelude)
(require 'string)

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;; Constants
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(defconst pulse-audio--step-size 5
  "The size by which to increase or decrease the volume.")

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;; Library
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(defun pulse-audio--message (x)
  "Output X to *Messages*."
  (message (string-format "[pulse-audio.el] %s" x)))

(defun pulse-audio-toggle-mute ()
  "Mute the default sink."
  (interactive)
  (prelude-start-process
   :name "pulse-audio-toggle-mute"
   :command "pactl set-sink-mute @DEFAULT_SINK@ toggle")
  (pulse-audio--message "Mute toggled."))

(defun pulse-audio-toggle-microphone ()
  "Mute the default sink."
  (interactive)
  (prelude-start-process
   :name "pulse-audio-toggle-microphone"
   :command "pactl set-source-mute @DEFAULT_SOURCE@ toggle")
  (pulse-audio--message "Microphone toggled."))

(defun pulse-audio-decrease-volume ()
  "Low the volume output of the default sink."
  (interactive)
  (prelude-start-process
   :name "pulse-audio-decrease-volume"
   :command (string-format "pactl set-sink-volume @DEFAULT_SINK@ -%s%%"
                           pulse-audio--step-size))
  (pulse-audio--message "Volume decreased."))

(defun pulse-audio-increase-volume ()
  "Raise the volume output of the default sink."
  (interactive)
  (prelude-start-process
   :name "pulse-audio-increase-volume"
   :command (string-format "pactl set-sink-volume @DEFAULT_SINK@ +%s%%"
                           pulse-audio--step-size))
  (pulse-audio--message "Volume increased."))

(provide 'pulse-audio)
;;; pulse-audio.el ends here