;*********************************************************************
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; OM-SoX, (c) 2011-2013 Marlon Schumacher (CIRMMT/McGill University) *
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; http://sourceforge.net/projects/omsox/ *
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; *
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; Multichannel Audio Manipulation and Functional Batch Processing. *
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; DSP based on SoX - (c) C.Bagwell and Contributors *
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; http://sox.sourceforge.net/ *
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;*********************************************************************
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;
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;This program is free software; you can redistribute it and/or
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;modify it under the terms of the GNU General Public License
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;as published by the Free Software Foundation; either version 2
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;of the License, or (at your option) any later version.
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;
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;See file LICENSE for further informations on licensing terms.
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;
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;This program is distributed in the hope that it will be useful,
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;but WITHOUT ANY WARRANTY; without even the implied warranty of
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;MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;GNU General Public License for more details.
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;
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;You should have received a copy of the GNU General Public License
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;along with this program; if not, write to the Free Software
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;Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,10 USA.
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;
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;Authors: M. Schumacher
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(in-package :om)
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; ==== SOX-PAN ========================
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(defclass! sox-pan (sox-input)
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(
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(gains :accessor gains :initarg :gains :initform nil :documentation *sox-gain-doc*)
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(panning :accessor panning :initform nil :initarg :panning :documentation *sox-panning-doc*)
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(numchannels :accessor numchannels :initform nil :initarg :numchannels :documentation "Number of available output channels for panning.")
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)
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(:icon 13)
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(:documentation "Sox-Pan allows panning a sound between a pair of adjacent channels.
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NB. Multichannel input is first summed into a single channel before panning.")
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)
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; possibly replace numchannels with out-channels
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; Note: the slot "gains" should actually better be "gain" here (atom), not "gains"
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; - this is inherited from sox-input
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(defmethod initialize-instance :after ((self sox-pan) &rest args)
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(declare (ignore args))
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(when (sound self)
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(unless (numchannels self) (setf (numchannels self) 2))
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(sox-init-gains self)
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(sox-init-panning self)
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(sox-init-sound self 'atom)
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(when (< (numchannels self) (+ 1 (floor (panning self))))
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(setf (numchannels self) (+ 1 (floor (panning self))))
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)
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)
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)
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#|
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(loop for sound in (list! (sound self))
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for i from 0 to (- sound-length 1) collect
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(if (equal (tracknum sound) 0)
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(nth i panning-list)
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(+ (tracknum sound) (* 0.01 (pan sound))))
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|#
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#|
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There's a number of options for dealing with 'pan' and 'tracknum' in sound objects
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1) leave it as is, meaning, sox-mix-console does not consider (overrides) pan or tracknum
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2) add the tracknum and pan parameters to sox-input -> consequence: cannot use paths as inputs to classes
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3) work with sound objects in sox-input classes (no conversion in sox-input) -> requires changes in sox-process
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|#
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