Remove example plugins

These are now maintained in the separate "lv2-examples" project to keep the
dependencies of lv2 itself minimal.

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" ;
-	] .