commit - /dev/null
commit + c708ecad1fd81315da8c6d46efd3e43c1dd31f15
blob - /dev/null
blob + 534c7cfd2545e6320894a42d42d0254db0e6d293 (mode 644)
--- /dev/null
+++ sndio.el
+;;; sndio.el --- Interact with sndio(8) -*- lexical-binding: t; -*-
+
+;; Copyright (C) 2020 Omar Polo
+
+;; Author: Omar Polo <op@omarpolo.com>
+;; Version: 1.0
+;; Keywords: multimedia
+;; URL: https://git.omarpolo.com/sndioctl.el
+
+;;; Commentary:
+
+;; This package provides the sndio major mode to interact with
+;; OpenBSD' sndio(8).
+
+;;; Code:
+
+(require 'cl-lib)
+
+(defvar sndioctl-cmd "sndioctl"
+ "Path to the sndioctl executable.")
+
+(defvar sndio-step 0.02
+ "Step for `sndio-increase' and `sndio-decrease'.")
+
+(define-derived-mode sndio-mode special-mode "sndio"
+ "Major mode for sndio interaction."
+
+ (define-key sndio-mode-map (kbd "n") #'forward-line)
+ (define-key sndio-mode-map (kbd "p") #'previous-line)
+ (define-key sndio-mode-map (kbd "i") #'sndio-increase)
+ (define-key sndio-mode-map (kbd "d") #'sndio-decrease)
+ (define-key sndio-mode-map (kbd "m") #'sndio-mute)
+ (define-key sndio-mode-map (kbd "t") #'sndio-toggle)
+ (define-key sndio-mode-map (kbd "g") #'sndio-update)
+ (define-key sndio-mode-map (kbd "d") #'kill-buffer)
+
+ (buffer-disable-undo)
+
+ (sndio-update))
+
+(defun sndio-update ()
+ "Update the current sndio buffer."
+ (interactive)
+ (with-current-buffer "*sndio*"
+ (save-excursion
+ (let ((inhibit-read-only t))
+ (erase-buffer)
+ (process-file sndioctl-cmd nil (current-buffer) nil)))))
+
+(defun sndio--run (&rest args)
+ "Run `sndioctl-cmd' with ARGS yielding its output."
+ (with-temp-buffer
+ (when (zerop (apply #'process-file sndioctl-cmd nil t nil args))
+ (buffer-string))))
+
+(defun sndio--current-io ()
+ "Yield the input/poutput at point as string."
+ (when-let (end (save-excursion
+ (beginning-of-line)
+ (ignore-errors (search-forward "="))))
+ (buffer-substring-no-properties (line-beginning-position)
+ (1- end))))
+
+(defun sndio--update-value (x)
+ "Update the value for the input/output at point setting it to X."
+ (save-excursion
+ (search-forward "=")
+ (let ((inhibit-read-only t))
+ (delete-region (point) (line-end-position))
+ (insert (string-trim-right x)))))
+
+(defun sndio-increase ()
+ "Increase the volume for the input/output at point."
+ (interactive)
+ (when-let (x (sndio--current-io))
+ (when-let (val (sndio--run "-n" (concat x "=+" (number-to-string sndio-step))))
+ (sndio--update-value val))))
+
+(defun sndio-decrease ()
+ "Decrease the volume for the input/output at point."
+ (interactive)
+ (when-let (x (sndio--current-io))
+ (when-let (val (sndio--run "-n" (concat x "=-" (number-to-string sndio-step))))
+ (sndio--update-value val))))
+
+(defun sndio-mute ()
+ "Mute the input/output at point."
+ (interactive)
+ (when-let (x (sndio--current-io))
+ (when-let (val (sndio--run "-n" (concat x "=0")))
+ (sndio--update-value val))))
+
+(defun sndio-toggle ()
+ "Toggle input/output at point."
+ (interactive)
+ (when-let (x (sndio--current-io))
+ (when-let (val (sndio--run "-n" (concat x "=!")))
+ (sndio--update-value val))))
+
+;;;###autoload
+(defun sndio ()
+ "Launch sndio."
+ (interactive)
+ (switch-to-buffer "*sndio*")
+ (sndio-mode))
+
+(provide 'sndio)
+;;; sndio.el ends here.