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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* lv2.cc
*
* Wed Jul 13 13:50:33 CEST 2011
* Copyright 2011 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of CamSync.
*
* CamSync is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* CamSync is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with CamSync; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include <lv2/lv2plug.in/ns/lv2core/lv2.h>
#include <lv2/lv2plug.in/ns/ext/atom/atom.h>
#include <stdlib.h>
#include <string.h>
#include "lv2_gui.h"
#include "lv2_instance.h"
#include <hugin.hpp>
#define CAMSYNC_URI "http://camsync.org/lv2"
#define NS_DG CAMSYNC_URI "/atom#"
// Stuff to handle CamSync* transmission from instance to GUI.
static LV2_CamSync_Descriptor dg_descriptor;
static CamSync *dg_get_pci(LV2_Handle instance)
{
DGLV2 *dglv2 = (DGLV2 *)instance;
return dglv2->dg;
}
LV2_State_Status
dg_save(LV2_Handle instance,
LV2_State_Store_Function store,
LV2_State_Handle handle,
uint32_t flags,
const LV2_Feature *const * features)
{
DGLV2 *dglv2 = (DGLV2 *)instance;
if(!dglv2 || !dglv2->map || !dglv2->map->map) {
// Missing urid feature?
return LV2_STATE_ERR_NO_FEATURE;
}
std::string config = dglv2->dg->configString();
// Backwards compatible fix for errornously stored '\0' byte in < v0.9.8.
// Remove when we reach v1.0
config += "\n";
store(handle,
dglv2->map->map(dglv2->map->handle, NS_DG "config"),
config.data(),
config.length(),
dglv2->map->map(dglv2->map->handle, LV2_ATOM__Chunk),
LV2_STATE_IS_POD | LV2_STATE_IS_PORTABLE);
return LV2_STATE_SUCCESS;
}
LV2_State_Status
dg_restore(LV2_Handle instance,
LV2_State_Retrieve_Function retrieve,
LV2_State_Handle handle,
uint32_t flags,
const LV2_Feature *const * features)
{
DGLV2 *dglv2 = (DGLV2 *)instance;
if(!dglv2 || !dglv2->map || !dglv2->map->map) {
// Missing urid feature?
return LV2_STATE_ERR_NO_FEATURE;
}
size_t size;
uint32_t type;
const char* data =
(const char*)retrieve(handle,
dglv2->map->map(dglv2->map->handle, NS_DG "config"),
&size, &type, &flags);
DEBUG(lv2, "Config string size: %d, data*: %p\n", (int)size, data);
if(data && size) {
std::string config;
// Fix for errornously stored '\0' byte in < v0.9.8.
// Remove when we reach v1.0
if(data[size - 1] == '\0') size--;
config.append(data, size);
dglv2->dg->setConfigString(config);
}
return LV2_STATE_SUCCESS;
}
static LV2_State_Interface dg_persist = {
dg_save,
dg_restore
};
LV2_Handle instantiate(const struct _LV2_Descriptor *descriptor,
double sample_rate,
const char *bundle_path,
const LV2_Feature *const *features)
{
DGLV2 *dglv2 = new DGLV2;
dglv2->map = NULL;
for (int i = 0 ; features[i] ; i++) {
if (!strcmp(features[i]->URI, LV2_URID_URI "#map")) {
dglv2->map = (LV2_URID_Map*)features[i]->data;
}
}
dg_descriptor.get_pci = dg_get_pci;
dglv2->in = new InputLV2();
dglv2->out = new OutputLV2();
dglv2->buffer = NULL;
dglv2->buffer_size = 0;
dglv2->dg = new CamSync(dglv2->out, dglv2->in);
dglv2->dg->setSamplerate(sample_rate);
return (LV2_Handle)dglv2;
}
void connect_port(LV2_Handle instance,
uint32_t port,
void *data_location)
{
DGLV2 *dglv2 = (DGLV2 *)instance;
if(port == 0) {// MIDI in
dglv2->in->eventPort = (LV2_Atom_Sequence*)data_location;
} else {// Audio Port
if(port - 1 < NUM_OUTPUTS) {
dglv2->out->outputPorts[port - 1].samples = (sample_t*)data_location;
dglv2->out->outputPorts[port - 1].size = 0;
}
}
}
void activate(LV2_Handle instance)
{
// We don't really need to do anything here.
DGLV2 *dglv2 = (DGLV2 *)instance;
(void)dglv2;
}
void run(LV2_Handle instance,
uint32_t sample_count)
{
static size_t pos = 0;
DGLV2 *dglv2 = (DGLV2 *)instance;
dglv2->dg->run(pos, dglv2->buffer, sample_count);
pos += sample_count;
}
void deactivate(LV2_Handle instance)
{
// We don't really need to do anything here.
DGLV2 *dglv2 = (DGLV2 *)instance;
dglv2->dg->stop();
}
void cleanup(LV2_Handle instance)
{
DGLV2 *dglv2 = (DGLV2 *)instance;
delete dglv2->dg;
delete dglv2->in;
delete dglv2->out;
}
const void* extension_data(const char *uri)
{
if(!strcmp(uri, PLUGIN_INSTANCE_URI)) return &dg_descriptor;
if(!strcmp(uri, LV2_STATE__interface)) return &dg_persist;
return NULL;
}
#ifdef __cplusplus
extern "C" {
#endif
static const LV2_Descriptor descriptor = {
CAMSYNC_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;
}
}
#ifdef __cplusplus
}
#endif
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