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-rw-r--r--plugins/eg-metro.lv2/README.txt9
-rw-r--r--plugins/eg-metro.lv2/manifest.ttl.in7
-rw-r--r--plugins/eg-metro.lv2/meson.build42
-rw-r--r--plugins/eg-metro.lv2/metro.c341
-rw-r--r--plugins/eg-metro.lv2/metro.ttl30
5 files changed, 0 insertions, 429 deletions
diff --git a/plugins/eg-metro.lv2/README.txt b/plugins/eg-metro.lv2/README.txt
deleted file mode 100644
index 5e9a84a..0000000
--- a/plugins/eg-metro.lv2/README.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-== Metronome ==
-
-This plugin demonstrates tempo synchronisation by clicking on every beat. The
-host sends this information to the plugin as events, so an event with new time
-and tempo information will be received whenever there is a change.
-
-Time is assumed to continue rolling at the tempo and speed defined by the last
-received tempo event, even across cycles, until a new tempo event is received
-or the plugin is deactivated.
diff --git a/plugins/eg-metro.lv2/manifest.ttl.in b/plugins/eg-metro.lv2/manifest.ttl.in
deleted file mode 100644
index bd93f66..0000000
--- a/plugins/eg-metro.lv2/manifest.ttl.in
+++ /dev/null
@@ -1,7 +0,0 @@
-@prefix lv2: <http://lv2plug.in/ns/lv2core#> .
-@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
-
-<http://lv2plug.in/plugins/eg-metro>
- a lv2:Plugin ;
- lv2:binary <metro@LIB_EXT@> ;
- rdfs:seeAlso <metro.ttl> .
diff --git a/plugins/eg-metro.lv2/meson.build b/plugins/eg-metro.lv2/meson.build
deleted file mode 100644
index ee4016e..0000000
--- a/plugins/eg-metro.lv2/meson.build
+++ /dev/null
@@ -1,42 +0,0 @@
-# Copyright 2022 David Robillard <d@drobilla.net>
-# SPDX-License-Identifier: 0BSD OR ISC
-
-plugin_sources = files('metro.c')
-bundle_name = 'eg-metro.lv2'
-data_filenames = ['manifest.ttl.in', 'metro.ttl']
-
-module = shared_library(
- 'metro',
- plugin_sources,
- c_args: c_suppressions,
- dependencies: [lv2_dep, m_dep],
- gnu_symbol_visibility: 'hidden',
- implicit_include_directories: false,
- install: true,
- install_dir: lv2dir / bundle_name,
- name_prefix: '',
-)
-
-config = configuration_data(
- {
- 'LIB_EXT': '.' + module.full_path().split('.')[-1],
- },
-)
-
-foreach filename : data_filenames
- if filename.endswith('.in')
- configure_file(
- configuration: config,
- input: files(filename),
- install_dir: lv2dir / bundle_name,
- output: filename.substring(0, -3),
- )
- else
- configure_file(
- copy: true,
- input: files(filename),
- install_dir: lv2dir / bundle_name,
- output: filename,
- )
- endif
-endforeach
diff --git a/plugins/eg-metro.lv2/metro.c b/plugins/eg-metro.lv2/metro.c
deleted file mode 100644
index 8e4c738..0000000
--- a/plugins/eg-metro.lv2/metro.c
+++ /dev/null
@@ -1,341 +0,0 @@
-// Copyright 2012-2016 David Robillard <d@drobilla.net>
-// SPDX-License-Identifier: ISC
-
-#include <lv2/atom/atom.h>
-#include <lv2/atom/util.h>
-#include <lv2/core/lv2.h>
-#include <lv2/core/lv2_util.h>
-#include <lv2/log/log.h>
-#include <lv2/log/logger.h>
-#include <lv2/time/time.h>
-#include <lv2/urid/urid.h>
-
-#include <math.h>
-#include <stdbool.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#ifndef M_PI
-# define M_PI 3.14159265
-#endif
-
-#define EG_METRO_URI "http://lv2plug.in/plugins/eg-metro"
-
-typedef struct {
- LV2_URID atom_Blank;
- LV2_URID atom_Float;
- LV2_URID atom_Object;
- LV2_URID atom_Path;
- LV2_URID atom_Resource;
- LV2_URID atom_Sequence;
- LV2_URID time_Position;
- LV2_URID time_barBeat;
- LV2_URID time_beatsPerMinute;
- LV2_URID time_speed;
-} MetroURIs;
-
-static const double attack_s = 0.005;
-static const double decay_s = 0.075;
-
-enum { METRO_CONTROL = 0, METRO_OUT = 1 };
-
-/** During execution this plugin can be in one of 3 states: */
-typedef enum {
- STATE_ATTACK, // Envelope rising
- STATE_DECAY, // Envelope lowering
- STATE_OFF // Silent
-} State;
-
-/**
- This plugin must keep track of more state than previous examples to be able
- to render audio. The basic idea is to generate a single cycle of a sine
- wave which is conceptually played continuously. The 'tick' is generated by
- enveloping the amplitude so there is a short attack/decay peak around a
- tick, and silence the rest of the time.
-
- This example uses a simple AD envelope with fixed parameters. A more
- sophisticated implementation might use a more advanced envelope and allow
- the user to modify these parameters, the frequency of the wave, and so on.
-*/
-typedef struct {
- LV2_URID_Map* map; // URID map feature
- LV2_Log_Logger logger; // Logger API
- MetroURIs uris; // Cache of mapped URIDs
-
- struct {
- LV2_Atom_Sequence* control;
- float* output;
- } ports;
-
- // Variables to keep track of the tempo information sent by the host
- double rate; // Sample rate
- float bpm; // Beats per minute (tempo)
- float speed; // Transport speed (usually 0=stop, 1=play)
-
- uint32_t elapsed_len; // Frames since the start of the last click
- uint32_t wave_offset; // Current play offset in the wave
- State state; // Current play state
-
- // One cycle of a sine wave
- float* wave;
- uint32_t wave_len;
-
- // Envelope parameters
- uint32_t attack_len;
- uint32_t decay_len;
-} Metro;
-
-static void
-connect_port(LV2_Handle instance, uint32_t port, void* data)
-{
- Metro* self = (Metro*)instance;
-
- switch (port) {
- case METRO_CONTROL:
- self->ports.control = (LV2_Atom_Sequence*)data;
- break;
- case METRO_OUT:
- self->ports.output = (float*)data;
- break;
- default:
- break;
- }
-}
-
-/**
- The activate() method resets the state completely, so the wave offset is
- zero and the envelope is off.
-*/
-static void
-activate(LV2_Handle instance)
-{
- Metro* self = (Metro*)instance;
-
- self->elapsed_len = 0;
- self->wave_offset = 0;
- self->state = STATE_OFF;
-}
-
-/**
- This plugin does a bit more work in instantiate() than the previous
- examples. The tempo updates from the host contain several URIs, so those
- are mapped, and the sine wave to be played needs to be generated based on
- the current sample rate.
-*/
-static LV2_Handle
-instantiate(const LV2_Descriptor* descriptor,
- double rate,
- const char* path,
- const LV2_Feature* const* features)
-{
- Metro* self = (Metro*)calloc(1, sizeof(Metro));
- if (!self) {
- return NULL;
- }
-
- // Scan host features for URID map
- // clang-format off
- const char* missing = lv2_features_query(
- features,
- LV2_LOG__log, &self->logger.log, false,
- LV2_URID__map, &self->map, true,
- NULL);
- // clang-format on
-
- lv2_log_logger_set_map(&self->logger, self->map);
- if (missing) {
- lv2_log_error(&self->logger, "Missing feature <%s>\n", missing);
- free(self);
- return NULL;
- }
-
- // Map URIS
- MetroURIs* const uris = &self->uris;
- LV2_URID_Map* const map = self->map;
- uris->atom_Blank = map->map(map->handle, LV2_ATOM__Blank);
- uris->atom_Float = map->map(map->handle, LV2_ATOM__Float);
- uris->atom_Object = map->map(map->handle, LV2_ATOM__Object);
- uris->atom_Path = map->map(map->handle, LV2_ATOM__Path);
- uris->atom_Resource = map->map(map->handle, LV2_ATOM__Resource);
- uris->atom_Sequence = map->map(map->handle, LV2_ATOM__Sequence);
- uris->time_Position = map->map(map->handle, LV2_TIME__Position);
- uris->time_barBeat = map->map(map->handle, LV2_TIME__barBeat);
- uris->time_beatsPerMinute = map->map(map->handle, LV2_TIME__beatsPerMinute);
- uris->time_speed = map->map(map->handle, LV2_TIME__speed);
-
- // Initialise instance fields
- self->rate = rate;
- self->bpm = 120.0f;
- self->attack_len = (uint32_t)(attack_s * rate);
- self->decay_len = (uint32_t)(decay_s * rate);
- self->state = STATE_OFF;
-
- // Generate one cycle of a sine wave at the desired frequency
- const double freq = 440.0 * 2.0;
- const double amp = 0.5;
- self->wave_len = (uint32_t)(rate / freq);
- self->wave = (float*)malloc(self->wave_len * sizeof(float));
- for (uint32_t i = 0; i < self->wave_len; ++i) {
- self->wave[i] = (float)(sin(i * 2 * M_PI * freq / rate) * amp);
- }
-
- return (LV2_Handle)self;
-}
-
-static void
-cleanup(LV2_Handle instance)
-{
- Metro* self = (Metro*)instance;
- free(self->wave);
- free(self);
-}
-
-/**
- Play back audio for the range [begin..end) relative to this cycle. This is
- called by run() in-between events to output audio up until the current time.
-*/
-static void
-play(Metro* self, uint32_t begin, uint32_t end)
-{
- float* const output = self->ports.output;
- const uint32_t frames_per_beat = (uint32_t)(60.0f / self->bpm * self->rate);
- const float attack_den = self->attack_len ? (float)self->attack_len : 1.0f;
-
- if (self->speed == 0.0f) {
- memset(output, 0, (end - begin) * sizeof(float));
- return;
- }
-
- for (uint32_t i = begin; i < end; ++i) {
- switch (self->state) {
- case STATE_ATTACK:
- // Amplitude increases from 0..1 until attack_len
- output[i] =
- self->wave[self->wave_offset] * (float)self->elapsed_len / attack_den;
- if (self->elapsed_len >= self->attack_len) {
- self->state = STATE_DECAY;
- }
- break;
- case STATE_DECAY:
- // Amplitude decreases from 1..0 until attack_len + decay_len
- output[i] = 0.0f;
- output[i] = self->wave[self->wave_offset] *
- (1 - ((float)(self->elapsed_len - self->attack_len) /
- (float)self->decay_len));
- if (self->elapsed_len >= self->attack_len + self->decay_len) {
- self->state = STATE_OFF;
- }
- break;
- case STATE_OFF:
- output[i] = 0.0f;
- }
-
- // We continuously play the sine wave regardless of envelope
- self->wave_offset = (self->wave_offset + 1) % self->wave_len;
-
- // Update elapsed time and start attack if necessary
- if (++self->elapsed_len == frames_per_beat) {
- self->state = STATE_ATTACK;
- self->elapsed_len = 0;
- }
- }
-}
-
-/**
- Update the current position based on a host message. This is called by
- run() when a time:Position is received.
-*/
-static void
-update_position(Metro* self, const LV2_Atom_Object* obj)
-{
- const MetroURIs* uris = &self->uris;
-
- // Received new transport position/speed
- LV2_Atom* beat = NULL;
- LV2_Atom* bpm = NULL;
- LV2_Atom* speed = NULL;
- // clang-format off
- lv2_atom_object_get(obj,
- uris->time_barBeat, &beat,
- uris->time_beatsPerMinute, &bpm,
- uris->time_speed, &speed,
- NULL);
- // clang-format on
-
- if (bpm && bpm->type == uris->atom_Float) {
- // Tempo changed, update BPM
- self->bpm = ((LV2_Atom_Float*)bpm)->body;
- }
- if (speed && speed->type == uris->atom_Float) {
- // Speed changed, e.g. 0 (stop) to 1 (play)
- self->speed = ((LV2_Atom_Float*)speed)->body;
- }
- if (beat && beat->type == uris->atom_Float) {
- // Received a beat position, synchronise
- // This hard sync may cause clicks, a real plugin would be more graceful
- const float frames_per_beat = (float)(60.0 / self->bpm * self->rate);
- const float bar_beats = ((LV2_Atom_Float*)beat)->body;
- const float beat_beats = bar_beats - floorf(bar_beats);
- self->elapsed_len = (uint32_t)(beat_beats * frames_per_beat);
- if (self->elapsed_len < self->attack_len) {
- self->state = STATE_ATTACK;
- } else if (self->elapsed_len < self->attack_len + self->decay_len) {
- self->state = STATE_DECAY;
- } else {
- self->state = STATE_OFF;
- }
- }
-}
-
-static void
-run(LV2_Handle instance, uint32_t sample_count)
-{
- Metro* self = (Metro*)instance;
- const MetroURIs* uris = &self->uris;
-
- // Work forwards in time frame by frame, handling events as we go
- const LV2_Atom_Sequence* in = self->ports.control;
- uint32_t last_t = 0;
- for (const LV2_Atom_Event* ev = lv2_atom_sequence_begin(&in->body);
- !lv2_atom_sequence_is_end(&in->body, in->atom.size, ev);
- ev = lv2_atom_sequence_next(ev)) {
- // Play the click for the time slice from last_t until now
- play(self, last_t, (uint32_t)ev->time.frames);
-
- // Check if this event is an Object
- // (or deprecated Blank to tolerate old hosts)
- if (ev->body.type == uris->atom_Object ||
- ev->body.type == uris->atom_Blank) {
- const LV2_Atom_Object* obj = (const LV2_Atom_Object*)&ev->body;
- if (obj->body.otype == uris->time_Position) {
- // Received position information, update
- update_position(self, obj);
- }
- }
-
- // Update time for next iteration and move to next event
- last_t = (uint32_t)ev->time.frames;
- }
-
- // Play for remainder of cycle
- play(self, last_t, sample_count);
-}
-
-static const LV2_Descriptor descriptor = {
- EG_METRO_URI,
- instantiate,
- connect_port,
- activate,
- run,
- NULL, // deactivate,
- cleanup,
- NULL, // extension_data
-};
-
-LV2_SYMBOL_EXPORT const LV2_Descriptor*
-lv2_descriptor(uint32_t index)
-{
- return index == 0 ? &descriptor : NULL;
-}
diff --git a/plugins/eg-metro.lv2/metro.ttl b/plugins/eg-metro.lv2/metro.ttl
deleted file mode 100644
index 8b4af3d..0000000
--- a/plugins/eg-metro.lv2/metro.ttl
+++ /dev/null
@@ -1,30 +0,0 @@
-@prefix atom: <http://lv2plug.in/ns/ext/atom#> .
-@prefix doap: <http://usefulinc.com/ns/doap#> .
-@prefix lv2: <http://lv2plug.in/ns/lv2core#> .
-@prefix time: <http://lv2plug.in/ns/ext/time#> .
-@prefix urid: <http://lv2plug.in/ns/ext/urid#> .
-
-<http://lv2plug.in/plugins/eg-metro>
- a lv2:Plugin ;
- doap:name "Example Metronome" ;
- doap:license <http://opensource.org/licenses/isc> ;
- lv2:project <http://lv2plug.in/ns/lv2> ;
- lv2:requiredFeature urid:map ;
- lv2:optionalFeature lv2:hardRTCapable ;
- lv2:port [
- a lv2:InputPort ,
- atom:AtomPort ;
- atom:bufferType atom:Sequence ;
-# Since this port supports time:Position, the host knows to deliver time and
-# tempo information
- atom:supports time:Position ;
- lv2:index 0 ;
- lv2:symbol "control" ;
- lv2:name "Control" ;
- ] , [
- a lv2:AudioPort ,
- lv2:OutputPort ;
- lv2:index 1 ;
- lv2:symbol "out" ;
- lv2:name "Out" ;
- ] .
generated by cgit v1.2.1 (git 2.18.0) at 2025-11-14 16:08:16 +0000