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|
;;; emms-cue.el --- Recognize cue sheet file -*- lexical-binding: t; -*-
;; Copyright (C) 2009 Free Software Foundation, Inc.
;; Author: William Xu <william.xwl@gmail.com>
;; This file is part of EMMS.
;; EMMS is free software; you can redistribute it and/or
;; modify it under the terms of the GNU General Public License
;; as published by the Free Software Foundation; either version 3
;; of the License, or (at your option) any later version.
;; EMMS is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with EMMS; if not, write to the Free Software Foundation,
;; Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
;;; Commentary:
;; By parsing cue file, we will be able to play next/previous track from a
;; single .ape or .flac file.
;;; Code:
(require 'emms-playing-time)
(require 'emms-info)
(defun emms-cue-next ()
"Play next track from .cue file."
(interactive)
(let ((cue-track (emms-cue-next-track)))
(if (cdr cue-track)
(progn
(emms-seek-to (cdr cue-track))
(message "Will play: %s" (car cue-track)))
(message "Nothing to seek or missing .cue file?"))))
(defun emms-cue-previous ()
"Play previous track from .cue file."
(interactive)
(let ((cue-track (emms-cue-previous-track)))
(if (cdr cue-track)
(progn
(emms-seek-to (cdr cue-track))
(message "Will play: %s" (car cue-track)))
(message "Nothing to seek or missing .cue file?"))))
(defun emms-cue-next-track (&optional previous-p)
"Get title and offset of next track from .cue file.
When PREVIOUS-P is t, get previous track info instead."
(let* ((track (emms-playlist-current-selected-track))
(name (emms-track-get track 'name))
(cue (concat (file-name-sans-extension name)".cue")))
(when (file-exists-p cue)
(with-temp-buffer
(emms-insert-file-contents cue)
(save-excursion
(if previous-p
(goto-char (point-max))
(goto-char (point-min)))
(let ((offset nil)
(title "")
;; We should search one more track far when getting previous
;; track.
(one-more-track previous-p))
(while (and (not offset)
(funcall
(if previous-p 'search-backward-regexp 'search-forward-regexp)
"INDEX 01 \\([0-9][0-9]\\):\\([0-9][0-9]\\):\\([0-9][0-9]\\)" nil t 1))
(let* ((min (string-to-number (match-string-no-properties 1)))
(sec (string-to-number (match-string-no-properties 2)))
(msec (string-to-number (match-string-no-properties 3)))
(total-sec (+ (* min 60) sec (/ msec 100.0))))
(when (funcall (if previous-p '> '<) emms-playing-time total-sec)
(if (not one-more-track)
(progn
(setq offset total-sec)
(when (search-backward-regexp "TITLE \"\\(.*\\)\"" nil t 1)
(setq title (match-string-no-properties 1))))
(setq one-more-track nil)))))
(cons title offset)))))))
(defun emms-cue-previous-track ()
"See `emms-cue-next-track'."
(emms-cue-next-track t))
(defun emms-info-cueinfo (track)
"Add track information to TRACK.
This is a useful element for `emms-info-functions'."
(when (and (emms-track-file-p track)
(string-match "\\.\\(ape\\|flac\\)\\'" (emms-track-name track)))
(let ((cue (concat (file-name-sans-extension (emms-track-name track))
".cue")))
(when (file-exists-p cue)
(with-temp-buffer
(emms-insert-file-contents cue)
(save-excursion
(mapc (lambda (i)
(goto-char (point-min))
(when (let ((case-fold-search t))
(search-forward-regexp
(concat (car i) " \\(.*\\)") nil t 1))
(emms-track-set track
(cdr i)
(replace-regexp-in-string
"\\`\"\\|\"\\'" "" (match-string 1)))))
'(("performer" . info-artist)
("title" . info-album)
("title" . info-title)
("rem date" . info-year)))))))))
(provide 'emms-cue)
;;; emms-cue.el ends here
|
