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102 lines
3.7 KiB
102 lines
3.7 KiB
#! /usr/bin/env racket
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#lang racket
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(require racket/system)
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(require racket/pretty)
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(require "helpers.rkt")
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(require "config_parser.rkt")
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(define args (vector->list (current-command-line-arguments)))
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(define media-player (string->path (hash-ref settings "player" "/usr/bin/mplayer")))
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(define player-args (hash-ref settings "args" '()))
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(define file-types
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(update (make-hash) (hash-ref settings "filetypes" '(("avi" #t)))))
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(define (file-list) ; list of files in the current working directory
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(map path->string ; get the strings from the list of paths
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(directory-list (current-directory))))
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; check if a filename has a desired suffix
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(define (check-suffix file-types)
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(compose
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(partial hash-has-key? file-types)
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(lambda (x)
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(let*
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((len (string-length x) ))
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(substring x (- len 3) len)))))
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; filter out filenames without the desired suffix
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(define (filter-paths file-types paths)
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(filter (check-suffix file-types) paths))
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(define (play-list)
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(sort-paths (filter-paths file-types (file-list)))) ; first commandline argument is the filename
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; sort the paths
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(define (sort-paths paths)
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(sort paths string<?))
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; abusing hash tables to be sets
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(define played
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(let* ((table (make-hash)))
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(map (lambda (fname)
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(hash-set! table fname #t)) (play-list))
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table))
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; list of new files that have been seen
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(define (new-files sett files)
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(filter
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(compose not (partial hash-has-key? played))
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files))
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; (define (controller pid out)
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(define (play-files filenames args)
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(let* ((nullport
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(open-output-file (string->path "/dev/null") #:exists 'append))) ; we don't want any output from the process
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(call-with-values
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(lambda () (apply subprocess (append
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(list nullport #f nullport media-player (car filenames))
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args)))
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list))) ; convert the 4 return values into a list
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(define (get-args message args)
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(cond ((false? message) args)
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(else (regexp-split #px"\\s" message))))
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(define (play fnames played args)
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(cond ((null? fnames) '())
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(else
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(let* ((results (play-files fnames args))) ; get the pid and the 3 i/o ports
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(subprocess-wait (first results)) ; block until a new file is started
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(close-output-port (third results)))
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(let* ((newfs (new-files played (play-list)))) ; get new list of files
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(play
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(append (cdr fnames) newfs) ; append new files to the tail of the list of old files
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(update played (map (compose reverse (partial list #f)) newfs)) ; update the set of played files
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(get-args (thread-try-receive) args)))))) ; check for new arguments from controller
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(define (controller player-thread)
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(cond
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((compose not thread-running?) player-thread ; if the thread is not running then return
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'()))
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(display "> ") ; TODO; add gnu readline support
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(let* [(input (read-line (current-input-port) 'linefeed))]
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input
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(cond ((eof-object? input) (kill-thread player-thread)) ; check if received EOF, and kill player-thread
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(else
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(thread-send player-thread input)
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(controller player-thread)))))
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(define player-thread (thread (lambda () (play (play-list) played player-args))))
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(define controller-thread (thread (lambda () (controller player-thread))))
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; check to see if the player is running, and if not then kill the controller
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(define (check)
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; (sleep 20)
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(cond (((compose not thread-running?) player-thread)
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(kill-thread controller-thread))
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(else (check))))
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(check)
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