From a254f2e035344a4ced0f14bc5d05196605a4f795 Mon Sep 17 00:00:00 2001
From: Tim Vaughan <timv@ughan.xyz>
Date: Thu, 5 Dec 2019 10:23:51 +0100
Subject: [PATCH] More hacking.

---
 emus.el | 85 ++++++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 72 insertions(+), 13 deletions(-)

diff --git a/emus.el b/emus.el
index c66aed3..616d183 100644
--- a/emus.el
+++ b/emus.el
@@ -1,6 +1,6 @@
-;;; emus.el --- Simple music player for Emacs
+;;; emus.el --- Simple music player for Emacs.  -*- lexical-binding:t -*-
 
-;; Author: T. G. Vaughan <tgvaughan@gmail.com>
+;; Author: Tim Vaughan <timv@ughan.xyz>
 ;; Version: 1.0
 ;; Keywords: multimedia
 ;; URL: http://github.com/tgvaughan/emus
@@ -12,36 +12,95 @@
 
 ;;; Code:
 
+;;; Customizations
+;;
+
 (defgroup emus nil
   "Simple music player for Emacs inspired by CMUS."
   :group 'multimedia)
 
 (defcustom emus-directory "~/Music/"
   "Directory containing audio files for emus."
-  :type 'string
-  :group 'emus)
+  :type '(string))
 
-(defcustom emus-mpg123-excecutable "mpg123"
+(defcustom emus-mpg123-program "mpg123"
   "Name of (and, optionally, path to) mpg123 binary."
-  :type 'string
-  :group 'emus)
+  :type '(string))
+
+;;; Library
+;;
+
+(defvar emus-library nil
+  "Emus audio library.")
 
 (defun emus-get-audio-files ()
   "Get all mp3 files in main emus directory."
   (directory-files-recursively emus-directory ".*\\.mp3"))
 
-(defun emus ()
-  "Switch to *emus* audio library buffer."
+(defvar emus-tags nil)
+
+(defun emus-update-tags ()
+  "Get ID3 tags for given filename"
+  (let ((proc (emus-get-process))
+        (depth 0)
+        (tagstr "")
+        (filenames (emus-get-audio-files)))
+    (setq emus-tags nil)
+    (set-process-filter proc (lambda (proc string)
+                               (setq tagstr (concat tagstr string))
+                               (cond
+                                ((string-suffix-p "}\n" string) (setq depth (- depth 1)))
+                                ((string-suffix-p "{\n" string) (setq depth (+ depth 1))))
+                               (when (and (= depth 0) (string-suffix-p "\n" string))
+                                 (add-to-list 'emus-tags `(,(car filenames) ,tagstr))
+                                 (setq tagstr "")
+                                 (setq filenames (cdr filenames))
+                                 (if filenames
+                                     (emus-send-cmd "lp" (car filenames))
+                                   (set-process-filter proc nil)))))
+    (emus-send-cmd "lp" (car filenames))))
+
+(defun emus-get-process ()
+  "Return current or new mpg123 process."
+  (let* ((emus-process-raw (get-process "emus-process"))
+         (emus-process (if emus-process-raw
+                           (if (process-live-p emus-process-raw)
+                               emus-process-raw
+                             (kill-process emus-process-raw)
+                             nil))))
+    (if emus-process
+        emus-process
+      (make-process :name "emus-process"
+                    ;; :buffer (get-buffer-create "*emus-process*")
+                    :command `(,emus-mpg123-program "-R")))))
+
+(defun emus-send-cmd (cmd &rest args)
+  (process-send-string (emus-get-process)
+                       (concat
+                        (seq-reduce (lambda (s1 s2) (concat s1 " " s2)) args cmd)
+                        "\n")))
+
+;;; Browser
+;;
+
+(defun emus-browse ()
+  "Switch to *emus* audio library browser."
   (interactive)
   (switch-to-buffer "*emus*")
   (emus-mode))
 
 (define-derived-mode emus-mode special-mode "Emus"
-  "Major mode for EMUS music player."
+  "Major mode for EMUS music player.")
+
+;;; Debugging
+
+(defun emus-test ()
+  (message (emus-get-file-tags "/Users/vaughant/Music/Floex_-_Zorya/Floex - Zorya - 01 Ursa Major.mp3")))
 
-  (setq-local default-directory emus-directory)
+(defun emus-test-play ()
+  (emus-send-cmd "lp" "/Users/vaughant/Music/Floex_-_Zorya/Floex - Zorya - 01 Ursa Major.mp3")
+  (emus-send-cmd "silence")
+  (emus-send-cmd "p"))
 
-  (let ((player (make-process :name "mpg123" :command '(emus-mpg123-excecutable "-R"))))
-    (process-send-string player "load The Midnight - Endless Summer - 01 Endless Summer.mp3\n")))
 
 ;;; emus.el ends here
-- 
2.20.1