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authorDavid Robillard <d@drobilla.net>2014-08-06 01:26:06 +0000
committerDavid Robillard <d@drobilla.net>2014-08-06 01:26:06 +0000
commit74d7751c37d2c991d244c1c23e1a4cd24451ac41 (patch)
treeaf301c27cbf585ae71f95e9e14e2380f062e6739 /plugins/eg02-midigate.lv2
parentf181b31c11d6a9317695c68c6cce30319e7e2faa (diff)
downloadlv2-74d7751c37d2c991d244c1c23e1a4cd24451ac41.tar.xz
Order book chapters in build script rather than by bundle name.
Diffstat (limited to 'plugins/eg02-midigate.lv2')
-rw-r--r--plugins/eg02-midigate.lv2/README.txt10
-rw-r--r--plugins/eg02-midigate.lv2/manifest.ttl.in10
-rw-r--r--plugins/eg02-midigate.lv2/midigate.c227
-rw-r--r--plugins/eg02-midigate.lv2/midigate.ttl56
l---------plugins/eg02-midigate.lv2/waf1
-rw-r--r--plugins/eg02-midigate.lv2/wscript65
6 files changed, 0 insertions, 369 deletions
diff --git a/plugins/eg02-midigate.lv2/README.txt b/plugins/eg02-midigate.lv2/README.txt
deleted file mode 100644
index 8f4a0f0..0000000
--- a/plugins/eg02-midigate.lv2/README.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-== MIDI Gate ==
-
-This plugin demonstrates:
-
- * Receiving MIDI input
-
- * Processing audio based on MIDI events with sample accuracy
-
- * Supporting MIDI programs which the host can control/automate, or present a
- user interface for with human readable labels
diff --git a/plugins/eg02-midigate.lv2/manifest.ttl.in b/plugins/eg02-midigate.lv2/manifest.ttl.in
deleted file mode 100644
index d32f1dc..0000000
--- a/plugins/eg02-midigate.lv2/manifest.ttl.in
+++ /dev/null
@@ -1,10 +0,0 @@
-# The manifest.ttl file follows the same template as the previous example.
-
-@prefix lv2: <http://lv2plug.in/ns/lv2core#> .
-@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
-@prefix ui: <http://lv2plug.in/ns/extensions/ui#> .
-
-<http://lv2plug.in/plugins/eg-midigate>
- a lv2:Plugin ;
- lv2:binary <midigate@LIB_EXT@> ;
- rdfs:seeAlso <midigate.ttl> .
diff --git a/plugins/eg02-midigate.lv2/midigate.c b/plugins/eg02-midigate.lv2/midigate.c
deleted file mode 100644
index 8d2bd74..0000000
--- a/plugins/eg02-midigate.lv2/midigate.c
+++ /dev/null
@@ -1,227 +0,0 @@
-/*
- Copyright 2013 David Robillard <d@drobilla.net>
-
- Permission to use, copy, modify, and/or distribute this software for any
- purpose with or without fee is hereby granted, provided that the above
- copyright notice and this permission notice appear in all copies.
-
- THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
- ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
- OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-*/
-
-#include <stdio.h>
-
-#include <math.h>
-#include <stdlib.h>
-
-#include "lv2/lv2plug.in/ns/ext/atom/atom.h"
-#include "lv2/lv2plug.in/ns/ext/atom/util.h"
-#include "lv2/lv2plug.in/ns/ext/midi/midi.h"
-#include "lv2/lv2plug.in/ns/ext/urid/urid.h"
-#include "lv2/lv2plug.in/ns/lv2core/lv2.h"
-
-#define MIDIGATE_URI "http://lv2plug.in/plugins/eg-midigate"
-
-typedef enum {
- MIDIGATE_CONTROL = 0,
- MIDIGATE_IN = 1,
- MIDIGATE_OUT = 2
-} PortIndex;
-
-typedef struct {
- // Port buffers
- const LV2_Atom_Sequence* control;
- const float* in;
- float* out;
-
- // Features
- LV2_URID_Map* map;
-
- struct {
- LV2_URID midi_MidiEvent;
- } uris;
-
- unsigned n_active_notes;
- unsigned program; // 0 = normal, 1 = inverted
-} Midigate;
-
-static LV2_Handle
-instantiate(const LV2_Descriptor* descriptor,
- double rate,
- const char* bundle_path,
- const LV2_Feature* const* features)
-{
- /** Scan features array for the URID feature we need. */
- LV2_URID_Map* map = NULL;
- for (int i = 0; features[i]; ++i) {
- if (!strcmp(features[i]->URI, LV2_URID__map)) {
- map = (LV2_URID_Map*)features[i]->data;
- break;
- }
- }
- if (!map) {
- /**
- No URID feature given. This is a host bug since we require this
- feature, but should be handled gracefully anyway.
- */
- return NULL;
- }
-
- Midigate* self = (Midigate*)calloc(1, sizeof(Midigate));
- self->map = map;
- self->uris.midi_MidiEvent = map->map(map->handle, LV2_MIDI__MidiEvent);
-
- return (LV2_Handle)self;
-}
-
-static void
-connect_port(LV2_Handle instance,
- uint32_t port,
- void* data)
-{
- Midigate* self = (Midigate*)instance;
-
- switch ((PortIndex)port) {
- case MIDIGATE_CONTROL:
- self->control = (const LV2_Atom_Sequence*)data;
- break;
- case MIDIGATE_IN:
- self->in = (const float*)data;
- break;
- case MIDIGATE_OUT:
- self->out = (float*)data;
- break;
- }
-}
-
-static void
-activate(LV2_Handle instance)
-{
- Midigate* self = (Midigate*)instance;
- self->n_active_notes = 0;
- self->program = 0;
-}
-
-/**
- A function to write a chunk of output, to be called from run(). If the gate
- is high, then the input will be passed through for this chunk, otherwise
- silence is written.
-*/
-static void
-write_output(Midigate* self, uint32_t offset, uint32_t len)
-{
- const bool active = (self->program == 0)
- ? (self->n_active_notes > 0)
- : (self->n_active_notes == 0);
- if (active) {
- memcpy(self->out + offset, self->in + offset, len * sizeof(float));
- } else {
- memset(self->out + offset, 0, len * sizeof(float));
- }
-}
-
-/**
- This plugin works through the cycle in chunks starting at offset zero. The
- +offset+ represents the current time within this this cycle, so
- the output from 0 to +offset+ has already been written.
-
- MIDI events are read in a loop. In each iteration, the number of active
- notes (on note on and note off) or the program (on program change) is
- updated, then the output is written up until the current event time. Then
- +offset+ is updated and the next event is processed. After the loop the
- final chunk from the last event to the end of the cycle is emitted.
-
- There is currently no standard way to describe MIDI programs in LV2, so the
- host has no way of knowing that these programs exist and should be presented
- to the user. A future version of LV2 will address this shortcoming.
-
- This pattern of iterating over input events and writing output along the way
- is a common idiom for writing sample accurate output based on event input.
-
- Note that this simple example simply writes input or zero for each sample
- based on the gate. A serious implementation would need to envelope the
- transition to avoid aliasing.
-*/
-static void
-run(LV2_Handle instance, uint32_t sample_count)
-{
- Midigate* self = (Midigate*)instance;
- uint32_t offset = 0;
-
- LV2_ATOM_SEQUENCE_FOREACH(self->control, ev) {
- if (ev->body.type == self->uris.midi_MidiEvent) {
- const uint8_t* const msg = (const uint8_t*)(ev + 1);
- switch (lv2_midi_message_type(msg)) {
- case LV2_MIDI_MSG_NOTE_ON:
- ++self->n_active_notes;
- break;
- case LV2_MIDI_MSG_NOTE_OFF:
- --self->n_active_notes;
- break;
- case LV2_MIDI_MSG_PGM_CHANGE:
- if (msg[1] == 0 || msg[1] == 1) {
- self->program = msg[1];
- }
- break;
- default: break;
- }
- }
-
- write_output(self, offset, ev->time.frames - offset);
- offset = (uint32_t)ev->time.frames;
- }
-
- write_output(self, offset, sample_count - offset);
-}
-
-/**
- We have no resources to free on deactivation.
- Note that the next call to activate will re-initialise the state, namely
- self->n_active_notes, so there is no need to do so here.
-*/
-static void
-deactivate(LV2_Handle instance)
-{}
-
-static void
-cleanup(LV2_Handle instance)
-{
- free(instance);
-}
-
-/**
- This plugin also has no extension data to return.
-*/
-static const void*
-extension_data(const char* uri)
-{
- return NULL;
-}
-
-static const LV2_Descriptor descriptor = {
- MIDIGATE_URI,
- instantiate,
- connect_port,
- activate,
- run,
- deactivate,
- cleanup,
- extension_data
-};
-
-LV2_SYMBOL_EXPORT
-const LV2_Descriptor*
-lv2_descriptor(uint32_t index)
-{
- switch (index) {
- case 0:
- return &descriptor;
- default:
- return NULL;
- }
-}
diff --git a/plugins/eg02-midigate.lv2/midigate.ttl b/plugins/eg02-midigate.lv2/midigate.ttl
deleted file mode 100644
index e14a329..0000000
--- a/plugins/eg02-midigate.lv2/midigate.ttl
+++ /dev/null
@@ -1,56 +0,0 @@
-# The same set of namespace prefixes with two additions for LV2 extensions this
-# plugin uses: atom and urid.
-
-@prefix atom: <http://lv2plug.in/ns/ext/atom#> .
-@prefix doap: <http://usefulinc.com/ns/doap#> .
-@prefix lv2: <http://lv2plug.in/ns/lv2core#> .
-@prefix midi: <http://lv2plug.in/ns/ext/midi#> .
-@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
-@prefix urid: <http://lv2plug.in/ns/ext/urid#> .
-
-<http://lv2plug.in/plugins/eg-midigate>
- a lv2:Plugin ;
- doap:name "Example MIDI Gate" ;
- doap:license <http://opensource.org/licenses/isc> ;
- lv2:project <http://lv2plug.in/ns/lv2> ;
- lv2:requiredFeature urid:map ;
- lv2:optionalFeature lv2:hardRTCapable ;
-# This plugin has three ports. There is an audio input and output as before,
-# as well as a new AtomPort. An AtomPort buffer contains an Atom, which is a
-# generic container for any type of data. In this case, we want to receive
-# MIDI events, so the (mandatory) +atom:bufferType+ is atom:Sequence, which is
-# a series of events with time stamps.
-#
-# Events themselves are also generic and can contain any type of data, but in
-# this case we are only interested in MIDI events. The (optional)
-# +atom:supports+ property describes which event types are supported. Though
-# not required, this information should always be given so the host knows what
-# types of event it can expect the plugin to understand.
-#
-# The (optional) +lv2:designation+ of this port is +lv2:control+, which
-# indicates that this is the "main" control port where the host should send
-# events it expects to configure the plugin, in this case changing the MIDI
-# program. This is necessary since it is possible to have several MIDI input
-# ports, though typically it is best to have one.
- lv2:port [
- a lv2:InputPort ,
- atom:AtomPort ;
- atom:bufferType atom:Sequence ;
- atom:supports midi:MidiEvent ;
- lv2:designation lv2:control ;
- lv2:index 0 ;
- lv2:symbol "control" ;
- lv2:name "Control"
- ] , [
- a lv2:AudioPort ,
- lv2:InputPort ;
- lv2:index 1 ;
- lv2:symbol "in" ;
- lv2:name "In"
- ] , [
- a lv2:AudioPort ,
- lv2:OutputPort ;
- lv2:index 2 ;
- lv2:symbol "out" ;
- lv2:name "Out"
- ] .
diff --git a/plugins/eg02-midigate.lv2/waf b/plugins/eg02-midigate.lv2/waf
deleted file mode 120000
index 59a1ac9..0000000
--- a/plugins/eg02-midigate.lv2/waf
+++ /dev/null
@@ -1 +0,0 @@
-../../waf \ No newline at end of file
diff --git a/plugins/eg02-midigate.lv2/wscript b/plugins/eg02-midigate.lv2/wscript
deleted file mode 100644
index 44336af..0000000
--- a/plugins/eg02-midigate.lv2/wscript
+++ /dev/null
@@ -1,65 +0,0 @@
-#!/usr/bin/env python
-from waflib.extras import autowaf as autowaf
-import re
-
-# Variables for 'waf dist'
-APPNAME = 'eg-midigate.lv2'
-VERSION = '1.0.0'
-
-# Mandatory variables
-top = '.'
-out = 'build'
-
-def options(opt):
- opt.load('compiler_c')
- autowaf.set_options(opt)
-
-def configure(conf):
- conf.load('compiler_c')
- autowaf.configure(conf)
- autowaf.set_c99_mode(conf)
- autowaf.display_header('Midigate Configuration')
-
- if not autowaf.is_child():
- autowaf.check_pkg(conf, 'lv2', uselib_store='LV2')
-
- autowaf.display_msg(conf, 'LV2 bundle directory', conf.env.LV2DIR)
- print('')
-
-def build(bld):
- bundle = 'eg-midigate.lv2'
-
- # Make a pattern for shared objects without the 'lib' prefix
- module_pat = re.sub('^lib', '', bld.env.cshlib_PATTERN)
- module_ext = module_pat[module_pat.rfind('.'):]
-
- # Build manifest.ttl by substitution (for portable lib extension)
- bld(features = 'subst',
- source = 'manifest.ttl.in',
- target = '%s/%s' % (bundle, 'manifest.ttl'),
- install_path = '${LV2DIR}/%s' % bundle,
- LIB_EXT = module_ext)
-
- # Copy other data files to build bundle (build/eg-midigate.lv2)
- for i in ['midigate.ttl']:
- bld(features = 'subst',
- is_copy = True,
- source = i,
- target = '%s/%s' % (bundle, i),
- install_path = '${LV2DIR}/%s' % bundle)
-
- # Use LV2 headers from parent directory if building as a sub-project
- includes = None
- if autowaf.is_child:
- includes = '../..'
-
- # Build plugin library
- obj = bld(features = 'c cshlib',
- source = 'midigate.c',
- name = 'midigate',
- target = '%s/midigate' % bundle,
- install_path = '${LV2DIR}/%s' % bundle,
- uselib = 'LV2',
- includes = includes)
- obj.env.cshlib_PATTERN = module_pat
-