diff options
Diffstat (limited to 'plugins/eg06-fifths.lv2/fifths.c')
| -rw-r--r-- | plugins/eg06-fifths.lv2/fifths.c | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/plugins/eg06-fifths.lv2/fifths.c b/plugins/eg06-fifths.lv2/fifths.c deleted file mode 100644 index c7d12e1..0000000 --- a/plugins/eg06-fifths.lv2/fifths.c +++ /dev/null @@ -1,196 +0,0 @@ -/* - LV2 Fifths Example Plugin - Copyright 2014 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 <math.h> -#include <stdlib.h> -#include <string.h> -#ifndef __cplusplus -# include <stdbool.h> -#endif - -#include <sndfile.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/patch/patch.h" -#include "lv2/lv2plug.in/ns/ext/state/state.h" -#include "lv2/lv2plug.in/ns/ext/urid/urid.h" -#include "lv2/lv2plug.in/ns/lv2core/lv2.h" - -#include "./uris.h" - -enum { - FIFTHS_IN = 0, - FIFTHS_OUT = 1 -}; - -typedef struct { - // Features - LV2_URID_Map* map; - - // Ports - const LV2_Atom_Sequence* in_port; - LV2_Atom_Sequence* out_port; - - // URIs - FifthsURIs uris; -} Fifths; - -static void -connect_port(LV2_Handle instance, - uint32_t port, - void* data) -{ - Fifths* self = (Fifths*)instance; - switch (port) { - case FIFTHS_IN: - self->in_port = (const LV2_Atom_Sequence*)data; - break; - case FIFTHS_OUT: - self->out_port = (LV2_Atom_Sequence*)data; - break; - default: - break; - } -} - -static LV2_Handle -instantiate(const LV2_Descriptor* descriptor, - double rate, - const char* path, - const LV2_Feature* const* features) -{ - // Allocate and initialise instance structure. - Fifths* self = (Fifths*)malloc(sizeof(Fifths)); - if (!self) { - return NULL; - } - memset(self, 0, sizeof(Fifths)); - - // Get host features - for (int i = 0; features[i]; ++i) { - if (!strcmp(features[i]->URI, LV2_URID__map)) { - self->map = (LV2_URID_Map*)features[i]->data; - } - } - if (!self->map) { - fprintf(stderr, "Missing feature urid:map\n"); - free(self); - return NULL; - } - - // Map URIs and initialise forge/logger - map_fifths_uris(self->map, &self->uris); - - return (LV2_Handle)self; -} - -static void -cleanup(LV2_Handle instance) -{ - free(instance); -} - -static void -run(LV2_Handle instance, - uint32_t sample_count) -{ - Fifths* self = (Fifths*)instance; - FifthsURIs* uris = &self->uris; - - // Struct for a 3 byte MIDI event, used for writing notes - typedef struct { - LV2_Atom_Event event; - uint8_t msg[3]; - } MIDINoteEvent; - - // Initially self->out_port contains a Chunk with size set to capacity - - // Get the capacity - const uint32_t out_capacity = self->out_port->atom.size; - - // Write an empty Sequence header to the output - lv2_atom_sequence_clear(self->out_port); - self->out_port->atom.type = self->in_port->atom.type; - - // Read incoming events - LV2_ATOM_SEQUENCE_FOREACH(self->in_port, ev) { - if (ev->body.type == uris->midi_Event) { - const uint8_t* const msg = (const uint8_t*)(ev + 1); - switch (lv2_midi_message_type(msg)) { - case LV2_MIDI_MSG_NOTE_ON: - case LV2_MIDI_MSG_NOTE_OFF: - // Forward note to output - lv2_atom_sequence_append_event( - self->out_port, out_capacity, ev); - - const uint8_t note = msg[1]; - if (note <= 127 - 7) { - // Make a note one 5th (7 semitones) higher than input - MIDINoteEvent fifth; - - // Could simply do fifth.event = *ev here instead... - fifth.event.time.frames = ev->time.frames; // Same time - fifth.event.body.type = ev->body.type; // Same type - fifth.event.body.size = ev->body.size; // Same size - - fifth.msg[0] = msg[0]; // Same status - fifth.msg[1] = msg[1] + 7; // Pitch up 7 semitones - fifth.msg[2] = msg[2]; // Same velocity - - // Write 5th event - lv2_atom_sequence_append_event( - self->out_port, out_capacity, &fifth.event); - } - break; - default: - // Forward all other MIDI events directly - lv2_atom_sequence_append_event( - self->out_port, out_capacity, ev); - break; - } - } - } -} - -static const void* -extension_data(const char* uri) -{ - return NULL; -} - -static const LV2_Descriptor descriptor = { - EG_FIFTHS_URI, - instantiate, - connect_port, - NULL, // activate, - run, - NULL, // deactivate, - cleanup, - extension_data -}; - -LV2_SYMBOL_EXPORT -const LV2_Descriptor* lv2_descriptor(uint32_t index) -{ - switch (index) { - case 0: - return &descriptor; - default: - return NULL; - } -} |