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Date: Tue, 14 Apr 2020 22:33:14 +0000
From: "Jonathan Schleifer" <js@netbsd.org>
Subject: CVS commit: pkgsrc/audio
To: pkgsrc-changes@NetBSD.org
Reply-To: js@netbsd.org
Message-Id: <20200414223314.BE465FB27@cvs.NetBSD.org>
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Module Name:	pkgsrc
Committed By:	js
Date:		Tue Apr 14 22:33:14 UTC 2020

Modified Files:
	pkgsrc/audio: Makefile
Added Files:
	pkgsrc/audio/alac: DESCR Makefile PLIST distinfo

Log Message:
Import audio/alac from wip

A basic decoder for Apple Lossless Audio Codec files.


To generate a diff of this commit:
cvs rdiff -u -r1.593 -r1.594 pkgsrc/audio/Makefile
cvs rdiff -u -r0 -r1.1 pkgsrc/audio/alac/DESCR pkgsrc/audio/alac/Makefile \
    pkgsrc/audio/alac/PLIST pkgsrc/audio/alac/distinfo

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.


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Modified files:

Index: pkgsrc/audio/Makefile
diff -u pkgsrc/audio/Makefile:1.593 pkgsrc/audio/Makefile:1.594
--- pkgsrc/audio/Makefile:1.593	Tue Apr 14 04:36:39 2020
+++ pkgsrc/audio/Makefile	Tue Apr 14 22:33:14 2020
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.593 2020/04/14 04:36:39 tpaul Exp $
+# $NetBSD: Makefile,v 1.594 2020/04/14 22:33:14 js Exp $
 #
 
 COMMENT=	Audio tools
@@ -12,6 +12,7 @@ SUBDIR+=	adplay
 SUBDIR+=	adplug
 SUBDIR+=	aeneas
 SUBDIR+=	aiomixer
+SUBDIR+=	alac
 SUBDIR+=	alacconvert
 SUBDIR+=	alsa-lib
 SUBDIR+=	alsa-plugins-oss

Added files:

Index: pkgsrc/audio/alac/DESCR
diff -u /dev/null pkgsrc/audio/alac/DESCR:1.1
--- /dev/null	Tue Apr 14 22:33:14 2020
+++ pkgsrc/audio/alac/DESCR	Tue Apr 14 22:33:14 2020
@@ -0,0 +1,21 @@
+Located here is a basic decoder for Apple Lossless Audio Codec files
+(ALAC). ALAC is a proprietary lossless audio compression scheme. Apple
+never released any documents on the format.
+What I provide here is a C implementation of a decoder, written from
+reverse engineering the file format. It turns out that most of the
+algorithms in the codec are fairly well known. ALAC uses an adaptive FIR
+prediction algorithm and stores the error values using a modified rice
+or golumb algorithm. Further details are in alac.c.
+
+Although an encoder is not provided, by using the decoder as a sort of
+specification it should be fairly trivial to write an encoder. By
+exploiting other lossless audio encoders, such as FLAC, the task will be
+much easier. Although one wouldn't be able to copy the compression
+algorithms verbatim, as adaptive compression is used in ALAC and not in
+FLAC. There are, however, a bunch of academic papers on the issue.
+
+The program located here will not be able to handle all ALAC files, it
+can only handle mono or stereo files. ALAC allows up to 8 channels. It
+should be trivial to finish the implementation once I find files that I
+can test it with. The ALAC decoder supports both 16 and 24 bit sample
+sizes.
Index: pkgsrc/audio/alac/Makefile
diff -u /dev/null pkgsrc/audio/alac/Makefile:1.1
--- /dev/null	Tue Apr 14 22:33:14 2020
+++ pkgsrc/audio/alac/Makefile	Tue Apr 14 22:33:14 2020
@@ -0,0 +1,21 @@
+# $NetBSD: Makefile,v 1.1 2020/04/14 22:33:14 js Exp $
+
+DISTNAME=	alac_decoder-0.2.0
+CATEGORIES=	audio
+MASTER_SITES=	https://web.archive.org/web/20150510210401if_/http://craz.net/programs/itunes/files/
+EXTRACT_SUFX=	.tgz
+
+MAINTAINER=	js@pkgsrc.org
+HOMEPAGE=	https://web.archive.org/web/20150319040222/craz.net/programs/itunes/alac.html
+COMMENT=	Basic decoder for Apple Lossless Audio Codec files (ALAC)
+LICENSE=	mit
+
+WRKSRC=		${WRKDIR}/alac_decoder
+BUILD_TARGET=	alac
+
+INSTALLATION_DIRS+=	bin
+
+do-install:
+	${INSTALL_PROGRAM} ${WRKSRC}/alac ${DESTDIR}${PREFIX}/bin/alac
+
+.include "../../mk/bsd.pkg.mk"
Index: pkgsrc/audio/alac/PLIST
diff -u /dev/null pkgsrc/audio/alac/PLIST:1.1
--- /dev/null	Tue Apr 14 22:33:14 2020
+++ pkgsrc/audio/alac/PLIST	Tue Apr 14 22:33:14 2020
@@ -0,0 +1,2 @@
+@comment $NetBSD: PLIST,v 1.1 2020/04/14 22:33:14 js Exp $
+bin/alac
Index: pkgsrc/audio/alac/distinfo
diff -u /dev/null pkgsrc/audio/alac/distinfo:1.1
--- /dev/null	Tue Apr 14 22:33:14 2020
+++ pkgsrc/audio/alac/distinfo	Tue Apr 14 22:33:14 2020
@@ -0,0 +1,6 @@
+$NetBSD: distinfo,v 1.1 2020/04/14 22:33:14 js Exp $
+
+SHA1 (alac_decoder-0.2.0.tgz) = a620f6293ef2d9490927d21ec341bbeff13eabe8
+RMD160 (alac_decoder-0.2.0.tgz) = 72664dff4eeff6e484314f625f74337e60ba39fb
+SHA512 (alac_decoder-0.2.0.tgz) = 4b37d4fe37681bfccaa4a27fbaf11eb2a1fba5f14e77d219a6d9814ff44d1168534d05eb19443dd2fd11e6fcdf4da3a22e3f3c79314cb7a6767c152351b13e29
+Size (alac_decoder-0.2.0.tgz) = 19019 bytes


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