937 lines
23 KiB
HTML
937 lines
23 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<meta name="generator" content="AsciiDoc 10.2.0">
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<meta name="keywords" content="LADI, JACK, jack-audio-connection-kit, session management">
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<title>LADI Session Handler</title>
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<style type="text/css">
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/*
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* AsciiDoc 'ladi' theme, based on 'volnitsky' theme for xhtml11 and html5 backends.
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* Based on css from http://volnitsky.com, which was in turn based on default
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* theme from AsciiDoc
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*
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* FIXME: The styling is still a bit rough in places.
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*
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*/
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/* Default font. */
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body {
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font-family: Georgia,"Times New Roman",Times,serif;
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font-size: 16pt;
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}
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/* Title font. */
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h1, h2, h3, h4, h5, h6,
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div.title, caption.title,
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thead, p.table.header,
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#toctitle,
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#author, #revnumber, #revdate, #revremark,
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#footer {
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font-family: Candara,Arial,sans-serif;
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}
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a.image { border-bottom: 0; }
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#toc a {
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border-bottom: 1px dotted #999999;
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color: #3A3A4D !important;
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text-decoration: none !important;
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}
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#toc a:hover {
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border-bottom: 1px solid #6D4100;
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color: #6D4100 !important;
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text-decoration: none !important;
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}
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a { color: #666688; text-decoration: none; border-bottom: 1px dotted #666688; }
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a:visited { color: #615FA0; border-bottom: 1px dotted #615FA0; }
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a:hover { color: #6D4100; border-bottom: 1px solid #6D4100; }
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em {
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font-style: italic;
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color: #444466;
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}
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strong {
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font-weight: bold;
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color: #444466;
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}
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h1, h2, h3, h4, h5, h6 {
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color: #666688;
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margin-bottom: 0.5em;
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margin-right: 1em;
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line-height: 1.3;
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letter-spacing:+0.15em;
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}
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h1, h2, h3, h4, h5, h6 {
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margin-left: 0em;
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}
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/* h1 { margin-left: 2em; } */
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h2 { margin-left: 2em; }
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/* h3 { margin-left: 4em; } */
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/* h4 { margin-left: 5em; } */
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/* h5 { margin-left: 6em; } */
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/* h6 { margin-left: 7em; } */
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h2 { border-bottom: 4px solid #ccd; }
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h3 { border-bottom: 2px dotted #ccd; }
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/* h2, h3 { border-bottom: 2px solid #ccd; } */
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/* h2 { padding-top: 0.5em; } */
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/* h3 { float: left; } */
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/* h3 + * { clear: left; } */
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div.banner {
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background: #004455;
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text-align: center;
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color: #C6E9AF;
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padding: 0;
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margin: 0;
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}
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div.sectionbody {
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margin-top: 0;
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margin-left: 3em;
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margin-right: 1em;
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margin-bottom: 1em;
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}
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hr {
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border: 1px solid #444466;
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}
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p {
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margin-left: 0.5em;
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margin-right: 0.5em;
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margin-top: 0.5em;
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margin-bottom: 0.5em;
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}
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ul, ol, li > p {
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margin-top: 0;
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}
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pre {
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padding: 0;
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margin: 0;
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}
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#author {
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color: #444466;
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font-weight: bold;
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font-size: 1.1em;
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}
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#footer {
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font-size: small;
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border-top: 2px solid silver;
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margin: 0;
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}
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#footer-text {
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/* float: left; */
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padding: 1em;
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text-align: center;
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}
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#footer-badges {
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float: right;
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padding: 0.5em;
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}
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#preamble {
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margin-top: 1.5em;
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margin-bottom: 1.5em;
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}
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div.tableblock, div.imageblock, div.exampleblock, div.verseblock,
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div.quoteblock, div.literalblock, div.listingblock, div.sidebarblock,
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div.admonitionblock {
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margin-top: 1.5em;
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margin-bottom: 1.5em;
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}
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div.admonitionblock {
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margin-top: 2.5em;
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margin-bottom: 2.5em;
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}
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#content { /* Block element content. */
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margin: 2em;
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}
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/* Block element titles. */
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div.title, caption.title {
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color: #444466;
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font-weight: bold;
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text-align: left;
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margin-top: 1.0em;
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margin-bottom: 0.5em;
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}
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div.title + * {
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margin-top: 0;
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}
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td div.title:first-child {
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margin-top: 0.0em;
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}
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div.content div.title:first-child {
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margin-top: 0.0em;
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}
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div.content + div.title {
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margin-top: 0.0em;
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}
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div.sidebarblock > div.content {
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background: #ffffee;
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border: 1px solid silver;
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padding: 0.5em;
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}
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div.listingblock > div.content {
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border: 1px solid silver;
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background: #f4f4f4;
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padding: 0.5em;
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}
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div.quoteblock {
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padding-left: 2.0em;
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margin-right: 10%;
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}
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div.quoteblock > div.attribution {
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padding-top: 0.5em;
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text-align: right;
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}
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div.verseblock {
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padding-left: 2.0em;
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margin-right: 10%;
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}
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div.verseblock > pre.content {
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font-family: inherit;
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}
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div.verseblock > div.attribution {
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padding-top: 0.75em;
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text-align: left;
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}
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/* DEPRECATED: Pre version 8.2.7 verse style literal block. */
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div.verseblock + div.attribution {
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text-align: left;
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}
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div.admonitionblock .icon {
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vertical-align: top;
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font-size: 1.1em;
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font-weight: bold;
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text-decoration: underline;
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color: #444466;
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padding-right: 0.5em;
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}
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div.admonitionblock td.content {
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padding-left: 0.5em;
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border-left: 2px solid silver;
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}
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div.exampleblock > div.content {
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border-left: 2px solid silver;
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padding: 0.5em;
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}
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div.imageblock div.content { padding-left: 0; }
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span.image img { border-style: none; }
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a.image:visited { color: white; }
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dl {
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margin-top: 0.8em;
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margin-bottom: 0.8em;
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}
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dt {
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margin-top: 0.5em;
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margin-bottom: 0;
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font-style: normal;
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color: #444466;
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}
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dd > *:first-child {
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margin-top: 0.1em;
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}
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ul, ol {
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list-style-position: outside;
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}
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ol.arabic {
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list-style-type: decimal;
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}
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ol.loweralpha {
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list-style-type: lower-alpha;
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}
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ol.upperalpha {
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list-style-type: upper-alpha;
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}
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ol.lowerroman {
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list-style-type: lower-roman;
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}
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ol.upperroman {
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list-style-type: upper-roman;
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}
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div.compact ul, div.compact ol,
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div.compact p, div.compact p,
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div.compact div, div.compact div {
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margin-top: 0.1em;
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margin-bottom: 0.1em;
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}
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div.tableblock > table {
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border: 3px solid #444466;
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}
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thead {
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font-weight: bold;
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color: #444466;
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}
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tfoot {
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font-weight: bold;
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}
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td > div.verse {
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white-space: pre;
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}
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p.table {
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margin-top: 0;
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}
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/* Because the table frame attribute is overridden by CSS in most browsers. */
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div.tableblock > table[frame="void"] {
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border-style: none;
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}
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div.tableblock > table[frame="hsides"] {
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border-left-style: none;
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border-right-style: none;
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}
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div.tableblock > table[frame="vsides"] {
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border-top-style: none;
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border-bottom-style: none;
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}
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div.hdlist {
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margin-top: 0.8em;
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margin-bottom: 0.8em;
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}
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div.hdlist tr {
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padding-bottom: 15px;
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}
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dt.hdlist1.strong, td.hdlist1.strong {
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font-weight: bold;
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}
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td.hdlist1 {
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vertical-align: top;
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font-style: normal;
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padding-right: 0.8em;
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color: #444466;
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}
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td.hdlist2 {
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vertical-align: top;
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}
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div.hdlist.compact tr {
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margin: 0;
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padding-bottom: 0;
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}
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.comment {
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background: yellow;
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}
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@media print {
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#footer-badges { display: none; }
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}
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#toctitle {
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color: #666688;
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font-size: 1.2em;
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font-weight: bold;
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margin-top: 1.0em;
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margin-bottom: 0.1em;
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}
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div.toclevel1, div.toclevel2, div.toclevel3, div.toclevel4 { margin-top: 0; margin-bottom: 0; }
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div.toclevel1 { margin-top: 0.3em; margin-left: 0; font-size: 1.0em; }
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div.toclevel2 { margin-top: 0.25em; margin-left: 2em; font-size: 0.9em; }
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div.toclevel3 { margin-left: 4em; font-size: 0.8em; }
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div.toclevel4 { margin-left: 6em; font-size: 0.8em; }
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body {
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margin: 0;
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padding: 0;
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}
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.monospaced, tt, div.listingblock > div.content {
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font-family: Consolas, "Andale Mono", "Courier New", monospace;
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color: #004400;
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background: #f4f4f4;
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max-width: 80em;
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line-height: 1.2em;
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}
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#header {
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text-align: center;
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margin: 2em;
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}
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#toc {
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text-align: left;
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margin-left: 3em;
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max-width: 80%;
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}
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.paragraph p {
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line-height: 1.5em;
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/* margin: 1em; */
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}
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.paragraph p, li, dd, .content { max-width: 80em; }
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.admonitionblock { max-width: 35em; }
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div.sectionbody div.ulist > ul > li {
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list-style-type: square;
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color: #aaa;
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}
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div.sectionbody div.ulist > ul > li > * {
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color: black;
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/*font-size: 50%;*/
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}
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div.sectionbody div.ulist > ul > li div.ulist > ul > li {
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color: #ccd ;
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}
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div.sectionbody div.ulist > ul > li div.ulist > ul > li > * {
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color: black ;
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}
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em {
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font-style: normal ! important;
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font-weight: bold ! important;
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color: #662222 ! important;
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letter-spacing:+0.08em ! important;
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}
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span.underline { text-decoration: underline; }
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span.overline { text-decoration: overline; }
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span.line-through { text-decoration: line-through; }
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/*
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* html5 specific
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*
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* */
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table.tableblock {
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margin-top: 1.0em;
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margin-bottom: 1.5em;
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}
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thead, p.tableblock.header {
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font-weight: bold;
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color: #666688;
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}
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p.tableblock {
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margin-top: 0;
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}
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table.tableblock {
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border-width: 3px;
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border-spacing: 0px;
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border-style: solid;
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border-color: #444466;
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border-collapse: collapse;
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}
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th.tableblock, td.tableblock {
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border-width: 1px;
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padding: 4px;
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border-style: solid;
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border-color: #444466;
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}
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table.tableblock.frame-topbot {
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border-left-style: hidden;
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border-right-style: hidden;
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}
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table.tableblock.frame-sides {
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border-top-style: hidden;
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border-bottom-style: hidden;
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}
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table.tableblock.frame-none {
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border-style: hidden;
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}
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th.tableblock.halign-left, td.tableblock.halign-left {
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text-align: left;
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}
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th.tableblock.halign-center, td.tableblock.halign-center {
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text-align: center;
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}
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th.tableblock.halign-right, td.tableblock.halign-right {
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text-align: right;
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}
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th.tableblock.valign-top, td.tableblock.valign-top {
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vertical-align: top;
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}
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th.tableblock.valign-middle, td.tableblock.valign-middle {
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vertical-align: middle;
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}
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th.tableblock.valign-bottom, td.tableblock.valign-bottom {
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vertical-align: bottom;
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}
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</style>
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<script type="text/javascript">
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/*<+'])');
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// Function that scans the DOM tree for header elements (the DOM2
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// nodeIterator API would be a better technique but not supported by all
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// browsers).
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var iterate = function (el) {
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for (var i = el.firstChild; i != null; i = i.nextSibling) {
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if (i.nodeType == 1 /* Node.ELEMENT_NODE */) {
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var mo = re.exec(i.tagName);
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if (mo && (i.getAttribute("class") || i.getAttribute("className")) != "float") {
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result[result.length] = new TocEntry(i, getText(i), mo[1]-1);
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}
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iterate(i);
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}
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}
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}
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iterate(el);
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return result;
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}
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var toc = document.getElementById("toc");
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if (!toc) {
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return;
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}
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// Delete existing TOC entries in case we're reloading the TOC.
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var tocEntriesToRemove = [];
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var i;
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for (i = 0; i < toc.childNodes.length; i++) {
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var entry = toc.childNodes[i];
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if (entry.nodeName.toLowerCase() == 'div'
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&& entry.getAttribute("class")
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&& entry.getAttribute("class").match(/^toclevel/))
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tocEntriesToRemove.push(entry);
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}
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for (i = 0; i < tocEntriesToRemove.length; i++) {
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toc.removeChild(tocEntriesToRemove[i]);
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}
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// Rebuild TOC entries.
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var entries = tocEntries(document.getElementById("content"), toclevels);
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for (var i = 0; i < entries.length; ++i) {
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var entry = entries[i];
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if (entry.element.id == "")
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entry.element.id = "_toc_" + i;
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var a = document.createElement("a");
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a.href = "#" + entry.element.id;
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a.appendChild(document.createTextNode(entry.text));
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var div = document.createElement("div");
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div.appendChild(a);
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div.className = "toclevel" + entry.toclevel;
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toc.appendChild(div);
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}
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if (entries.length == 0)
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toc.parentNode.removeChild(toc);
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},
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/////////////////////////////////////////////////////////////////////
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// Footnotes generator
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/////////////////////////////////////////////////////////////////////
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/* Based on footnote generation code from:
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* http://www.brandspankingnew.net/archive/2005/07/format_footnote.html
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*/
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footnotes: function () {
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// Delete existing footnote entries in case we're reloading the footnodes.
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var i;
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var noteholder = document.getElementById("footnotes");
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if (!noteholder) {
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return;
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}
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var entriesToRemove = [];
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for (i = 0; i < noteholder.childNodes.length; i++) {
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var entry = noteholder.childNodes[i];
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if (entry.nodeName.toLowerCase() == 'div' && entry.getAttribute("class") == "footnote")
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entriesToRemove.push(entry);
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}
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for (i = 0; i < entriesToRemove.length; i++) {
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noteholder.removeChild(entriesToRemove[i]);
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}
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// Rebuild footnote entries.
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var cont = document.getElementById("content");
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/*]]>*/
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</script>
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<link rel="shortcut icon" type="image/x-icon" sizes="32x32" href="ladish-logo-32x32.ico" />
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<link rel="icon" type="image/x-icon" sizes="32x32" href="ladish-logo-32x32.ico" />
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<link rel="icon" type="image/x-icon" sizes="128x128" href="ladish-logo-128x128.png" />
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<link rel="apple-touch-icon" type="image/x-icon" sizes="140x140" href="ladi-140x140.png" />
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<link rel="apple-touch-icon" type="image/x-icon" sizes="128x128" href="ladish-logo-128x128.png" />
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</head>
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<body class="article">
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<div class="banner">
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<a href="https://ladish.org/">
|
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<img src="ladish_dark.png" alt="LADI Session Handler" height="140" width="497" />
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</a>
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</div>
|
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<div id="header">
|
|
<h1>LADISH</h1>
|
|
</div>
|
|
<div id="content">
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<div id="preamble">
|
|
<div class="sectionbody">
|
|
<div class="paragraph"><p>LADI Session Handler or simply ladish is a session management system
|
|
for <a href="https://jackaudio.org">JACK</a> applications on <a href="https://kernel.org/">GNU/Linux</a>.
|
|
Its aim is to allow you to have many different audio programs running
|
|
at once, to save their setup, close them down and then easily reload
|
|
the setup at some other time. ladish doesn't deal with any kind of
|
|
audio or MIDI data itself; it just runs programs, deals with
|
|
saving/loading (arbitrary) data and connects JACK ports together.</p></div>
|
|
<div class="paragraph"><p>The LADISH graphical interface (GTK+ based reference front end)
|
|
<span class="image">
|
|
<a class="image" href="https://lwn.net/Articles/533594/">
|
|
<img src="https://static.lwn.net/images/2013/audio-session/1-gladish-reteo.png" alt="gladish screenshot" width="100%">
|
|
</a>
|
|
</span></p></div>
|
|
<div class="paragraph"><p>The Claudia LADISH front end (Python + Qt based)
|
|
<span class="image">
|
|
<a class="image" href="https://lwn.net/Articles/533594/">
|
|
<img src="https://static.lwn.net/images/2013/audio-session/2-claudia.png" alt="Claudia screenshot" width="100%">
|
|
</a>
|
|
</span></p></div>
|
|
<div class="paragraph"><p>Features:</p></div>
|
|
<div class="ulist"><ul>
|
|
<li>
|
|
<p>
|
|
Save and restore sets of JACK (audio and MIDI) enabled
|
|
applications.
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Subgraph management, the Studio & Rooms concept.
|
|
Provide JACK clients with virtual hardware ports, so projects can
|
|
be transferred (or backups restored) between computers running
|
|
different hardware and backups.
|
|
Allows to decouple projects (loaded in a Room) from
|
|
hardware audio IO used in particular Studio.
|
|
A virtual jack-multicore cable connects room IO ports
|
|
to hardware IO ports.
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Don’t require session handling library to be used. There is no need
|
|
of such library for restoring connections between JACK clients.
|
|
LADISH is able to manage JACK apps that don't link to liblash (or liblo).
|
|
This is known as L0 (level zero) in LADISH.
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Seamless handling of apps that use ALSA sequencer ports.
|
|
This is achieved by use of a2jmidid and libalsapid.so.
|
|
The former creates jack-midi ports for the alsa sequencer ones.
|
|
The latter reports the alsa application process ID to ladishd,
|
|
so that ladishd can associate the a2jmidid-created ports with application.
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Flow canvas based GUI. Positions of elements on the canvas are
|
|
saved/restored.
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Allow clients to use external storage to save their state. This
|
|
includes storing internal state to non-filesystem place like memory
|
|
of a hardware synth. This also includes storing client internal
|
|
state (client project data) in a way that is not directly bound to
|
|
ladish project.
|
|
</p>
|
|
</li>
|
|
</ul></div>
|
|
<div class="paragraph"><p>Among project future goals are:</p></div>
|
|
<div class="ulist"><ul>
|
|
<li>
|
|
<p>
|
|
Support for pipewire setups (in addition to JACK1 and JACK2)
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
List of available JACK applications.
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Hierarchical and/or tag-based organization of projects.
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Support for applications that create more than one jack client per process
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Support for applications that create use more than one jack client process
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
<a href="https://ladish.org/nsm-proto.html">Non Session Manager protocol</a> support
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
<a href="https://new-session-manager.jackaudio.org/api/index.html">New Session Manager protocol</a> support
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Collaborate with the X11 window manager so window properties like
|
|
window position, virtual desktop and screen (multimonitor) are
|
|
saved/restored.
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Distributed studio - network connected computers. Netjack
|
|
configuration is part of the studio and thus is saved/restored.
|
|
Saving/restoring state in multi-machine network
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Ability to move entire sessions between computers,
|
|
or post sessions on the Internet for download.
|
|
Import/export operations, as opposed to save/load. Save/load
|
|
operate in current system and may cause saving data outside of
|
|
project itself (external storage). Import/export uses/produces
|
|
"tarball" suitable for transferring session data over network to
|
|
other computer or storing it in a backup archive.
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Session versioning via Git
|
|
</p>
|
|
</li>
|
|
</ul></div>
|
|
<div class="paragraph"><p>Tarballs:</p></div>
|
|
<div class="ulist"><ul>
|
|
<li>
|
|
<p>
|
|
<a href="https://dl.ladish.org/ladish/">https://dl.ladish.org/ladish/</a>
|
|
</p>
|
|
</li>
|
|
</ul></div>
|
|
<div class="paragraph"><p>GIT repositories:</p></div>
|
|
<div class="ulist"><ul>
|
|
<li>
|
|
<p>
|
|
<a href="https://gitea.ladish.org/LADI/ladish">Upstream development GIT repository</a><br>
|
|
Self-hosted upstream
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
<a href="https://github.com/LADI/ladish.git">Primary backup GIT repository at github.com</a><br>
|
|
Cloud hosted
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
<a href="https://repo.or.cz/ladish.git">Secondary backup GIT repository at repo.or.cz</a><br>
|
|
Cloud hosted
|
|
</p>
|
|
</li>
|
|
</ul></div>
|
|
<div class="paragraph"><p>LADI Session Handler was forked from the
|
|
<a href="https://lac.linuxaudio.org/2009/cdm/Thursday/02_Alasuutari/02.pdf">D-Bus-ified LASH project</a>.
|
|
Things that LADISH can do but LASH (D-Bus-ified or not) cannot:</p></div>
|
|
<div class="ulist"><ul>
|
|
<li>
|
|
<p>
|
|
Subgraph management, the Studio & Rooms concept.
|
|
Allows to decouple projects (loaded in a Room) from
|
|
hardware audio IO used in particular Studio.
|
|
A virtual jack-multicore cable connects room IO ports
|
|
to hardware IO ports.
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Don’t require session handling library to be used. There is no need
|
|
of such library for restoring connections between JACK clients.
|
|
LADISH is able to manage JACK apps that don't link to liblash (or liblo).
|
|
This is known as L0 (level zero) in LADISH.
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
Seamless handling of apps that use ALSA sequencer ports.
|
|
This is achieved by use of a2jmidid and libalsapid.so.
|
|
The former creates jack-midi ports for the alsa sequencer ones.
|
|
The latter reports the alsa application process ID to ladishd,
|
|
so that ladishd can associate the a2jmidid-created ports with application.
|
|
</p>
|
|
</li>
|
|
</ul></div>
|
|
<div class="paragraph"><p>See also:</p></div>
|
|
<div class="ulist"><ul>
|
|
<li>
|
|
<p>
|
|
<a href="https://gitea.ladish.org/LADI/ladish">LADI/ladish at Gitea</a>
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
<a href="https://github.com/LADI/">LADI at GitHub</a>
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
<a href="https://jackdbus.ladish.org/">jackdbus</a>
|
|
</p>
|
|
</li>
|
|
<li>
|
|
<p>
|
|
<a href="https://lac.linuxaudio.org/2009/cdm/Thursday/02_Alasuutari/02.pdf">Juuso ALASUUTARI, LASH Audio Session Handler: Past, Present, and Future</a>
|
|
</p>
|
|
</li>
|
|
</ul></div>
|
|
<div class="paragraph"><p>For related discussions, you are invited to join
|
|
<a href="https://libera.chat/">Libera.Chat</a> channel #ladi</p></div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
<div id="footnotes"><hr></div>
|
|
<div id="footer">
|
|
<div id="footer-text">
|
|
Last updated
|
|
2023-11-27 19:26:42 EET
|
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|
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</div>
|
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|