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;
; Toplevel configuration for the ALSA Ordinary Mixer Interface
;
; Copyright (c) 2003 Jaroslav Kysela <perex@perex.cz>
; License: GPL v2 (http://www.gnu.org/licenses/gpl.html)
;
(defun sndo_include (hctl stream)
(setq info (Acall "ctl_card_info" (Acall "hctl_ctl" hctl)))
(if (= (Aerror info) 0)
(progn
(setq info (Aresult info))
(setq driver (cdr (assq "driver" (unsetq info))))
(setq file (concat (path "data") "/alsa/cards/" (snd_card_alias driver) "/sndo" stream "-mixer.alisp"))
(setq r (include file))
(when (= r -2) (Asyserr "unable to find file " file))
)
(setq r (Aerror info))
)
(unsetq info driver file r)
)
(defun sndo_mixer_open_fcn (hctl stream pcm)
(setq fcn (concat "sndo" stream "_mixer_open"))
(setq r (if (exfun fcn) (funcall fcn hctl pcm) 0))
(when (= r 0)
(setq hctls (if hctls (cons hctls (cons hctl)) hctl))
)
(unsetq fcn r)
)
(defun sndo_mixer_open_hctl (name stream pcm)
(setq hctl (Acall "hctl_open" name nil))
(setq r (Aerror hctl))
(when (= r 0)
(setq hctl (Aresult hctl))
(setq r (sndo_include hctl stream))
(if (= r 0)
(setq r (sndo_mixer_open_fcn hctl stream pcm))
(Acall "hctl_close" hctl)
)
)
(unsetq hctl r)
)
(defun sndo_mixer_open_virtual (name stream pcm)
(setq file (concat (path "data") "/alsa/virtual/" name "/sndo" stream "-mixer.alisp"))
(setq r (include file))
(when (= r -2) (Asyserr "unable to find file " file))
(when (= r 0) (setq r (sndo_mixer_open_fcn nil stream pcm)))
(unsetq file r)
)
(defun sndo_mixer_open1 (name stream)
(if (compare-strings name 0 2 "hw:" 0 2)
(sndo_mixer_open_hctl name stream nil)
(sndo_mixer_open_virtual name stream nil)
)
)
(defun sndo_mixer_open (pname cname)
(setq r (sndo_mixer_open1 pname "p"))
(when (= r 0) (setq r (sndo_mixer_open1 cname "c")))
(when (!= r 0) (sndo_mixer_close))
(unsetq sndo_mixer_open
sndo_mixer_open_pcm sndo_mixer_open_pcm1
sndo_mixer_open_virtual sndo_mixer_open_fcn
sndo_include r)
)
(defun sndo_mixer_open_pcm1 (pcm stream)
(setq info (Acall "pcm_info" pcm))
(setq r (Aerror info))
(when (= r 0)
(setq info (Aresult info))
(setq card (cdr (assq "card" info)))
(setq r
(if (< card 0)
(sndo_mixer_open_virtual (Acall "pcm_name" pcm) stream pcm)
(sndo_mixer_open_hctl (format "hw:%i" card) stream pcm)
)
)
)
(unsetq info card r)
)
(defun sndo_mixer_open_pcm (ppcm cpcm)
(setq r (sndo_mixer_open_pcm1 ppcm "p"))
(when (= r 0) (setq r (sndo_mixer_open_pcm1 cpcm "c")))
(when (!= r 0) (sndo_mixer_close))
(unsetq sndo_mixer_open
sndo_mixer_open_pcm sndo_mixer_open_pcm1
sndo_mixer_open_virtual sndo_mixer_open_fcn
sndo_include r)
)
(defun sndo_mixer_close1 (hctl stream)
(when hctl
(progn
(setq fcn (concat "sndo" stream "_mixer_close"))
(when (exfun fcn) (funcall fcn hctl))
(unsetq fcn)
(Acall "hctl_close" hctl)
)
)
)
(defun sndo_mixer_close nil
(sndo_mixer_close1 (nth 1 hctls) "c")
(sndo_mixer_close1 (nth 0 hctls) "p")
(snd_card_alias_unset)
(unsetq hctls)
)
(include (concat (path "data") "/alsa/cards/aliases.alisp"))
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