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livetrax/gtk2_ardour/lv2_plugin_ui.cc

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/*
Copyright (C) 2008 Paul Davis
Author: Dave Robillard
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "ardour/processor.h"
#include "ardour/lv2_plugin.h"
#include "ardour_ui.h"
#include "gui_thread.h"
#include "lv2_plugin_ui.h"
using namespace Gtk;
using namespace ARDOUR;
using namespace PBD;
std::vector<struct lv2_external_ui*> g_external_uis;
void close_external_ui_windows()
{
struct lv2_external_ui* external_ui_ptr;
//cout << "close_external_ui_windows" << endl;
while (!g_external_uis.empty()) {
//cout << "pop" << endl;
external_ui_ptr = g_external_uis.back();
LV2_EXTERNAL_UI_HIDE(external_ui_ptr);
g_external_uis.pop_back();
}
}
void
LV2PluginUI::lv2_ui_write(
LV2UI_Controller controller,
uint32_t port_index,
uint32_t /*buffer_size*/,
uint32_t /*format*/,
const void* buffer)
{
//cout << "lv2_ui_write" << endl;
LV2PluginUI* me = (LV2PluginUI*)controller;
if (*(float*)buffer != me->_values[port_index]) {
//cout << "set_parameter " << port_index << ":" << *(float*)buffer << endl;
me->_lv2->set_parameter(port_index, *(float*)buffer);
}
}
void LV2PluginUI::on_external_ui_closed(LV2UI_Controller controller)
{
//cout << "on_external_ui_closed" << endl;
LV2PluginUI* me = (LV2PluginUI*)controller;
me->_screen_update_connection.disconnect();
//me->insert->set_gui(0);
for (std::vector<struct lv2_external_ui*>::iterator it = g_external_uis.begin() ; it < g_external_uis.end(); it++) {
if (*it == me->_external_ui_ptr) {
g_external_uis.erase(it);
}
}
//slv2_ui_instance_get_descriptor(me->_inst)->cleanup(me->_inst);
me->_external_ui_ptr = NULL;
}
void
LV2PluginUI::parameter_changed (uint32_t port_index, float val)
{
//cout << "parameter_changed" << endl;
if (val != _values[port_index]) {
parameter_update(port_index, val);
}
}
void
LV2PluginUI::parameter_update (uint32_t port_index, float val)
{
if (!_inst) {
return;
}
const LV2UI_Descriptor* ui_desc = slv2_ui_instance_get_descriptor(_inst);
LV2UI_Handle ui_handle = slv2_ui_instance_get_handle(_inst);
if (ui_desc->port_event)
ui_desc->port_event(ui_handle, port_index, 4, 0, &val);
_values[port_index] = val;
}
bool
LV2PluginUI::start_updating(GdkEventAny*)
{
if (!_output_ports.empty()) {
_screen_update_connection.disconnect();
_screen_update_connection = ARDOUR_UI::instance()->RapidScreenUpdate.connect
(sigc::mem_fun(*this, &LV2PluginUI::output_update));
}
return false;
}
bool
LV2PluginUI::stop_updating(GdkEventAny*)
{
//cout << "stop_updating" << endl;
if (//!_external_ui_ptr &&
!_output_ports.empty()) {
_screen_update_connection.disconnect();
}
return false;
}
void
LV2PluginUI::output_update()
{
//cout << "output_update" << endl;
if (_external_ui_ptr) {
LV2_EXTERNAL_UI_RUN(_external_ui_ptr);
}
/* FIXME only works with control output ports (which is all we support now anyway) */
uint32_t nports = _output_ports.size();
for (uint32_t i = 0; i < nports; ++i) {
uint32_t index = _output_ports[i];
parameter_changed(index, _lv2->get_parameter(index));
}
}
LV2PluginUI::LV2PluginUI (boost::shared_ptr<PluginInsert> pi, boost::shared_ptr<LV2Plugin> lv2p)
: PlugUIBase (pi)
, _lv2(lv2p)
, _inst(NULL)
, _values(NULL)
, _external_ui_ptr(NULL)
{
if (!_lv2->is_external_ui()) {
lv2ui_instantiate("gtk2gui");
}
}
void
LV2PluginUI::lv2ui_instantiate(const Glib::ustring& title)
{
LV2_Feature** features;
LV2_Feature** features_src;
LV2_Feature** features_dst;
size_t features_count;
bool is_external_ui;
is_external_ui = _lv2->is_external_ui();
if (is_external_ui) {
_external_ui_host.ui_closed = LV2PluginUI::on_external_ui_closed;
_external_ui_host.plugin_human_id = strdup(title.c_str());
_external_ui_feature.URI = LV2_EXTERNAL_UI_URI;
_external_ui_feature.data = &_external_ui_host;
features_src = features = (LV2_Feature**)_lv2->features();
features_count = 2;
while (*features++) {
features_count++;
}
features_dst = features = (LV2_Feature**)malloc(sizeof(LV2_Feature*) * features_count);
features_dst[--features_count] = NULL;
features_dst[--features_count] = &_external_ui_feature;
while (features_count--) {
*features++ = *features_src++;
}
} else {
features_dst = (LV2_Feature**)_lv2->features();
}
_inst = slv2_ui_instantiate(
_lv2->slv2_plugin(), _lv2->slv2_ui(), LV2PluginUI::lv2_ui_write, this,
features_dst);
if (is_external_ui) {
free(features_dst);
}
uint32_t num_ports = slv2_plugin_get_num_ports(_lv2->slv2_plugin());
for (uint32_t i = 0; i < num_ports; ++i) {
if (_lv2->parameter_is_output(i) && _lv2->parameter_is_control(i) && is_update_wanted(i)) {
_output_ports.push_back(i);
}
}
_external_ui_ptr = NULL;
if (_inst) {
if (!is_external_ui) {
GtkWidget* c_widget = (GtkWidget*)slv2_ui_instance_get_widget(_inst);
_gui_widget = Glib::wrap(c_widget);
_gui_widget->show_all();
pack_start(*_gui_widget, true, true);
} else {
_external_ui_ptr = (struct lv2_external_ui *)slv2_ui_instance_get_widget(_inst);
g_external_uis.push_back(_external_ui_ptr);
}
}
_values = new float[num_ports];
for (uint32_t i = 0; i < num_ports; ++i) {
bool ok;
uint32_t port = _lv2->nth_parameter(i, ok);
if (ok) {
_values[port] = _lv2->get_parameter(port);
if (_lv2->parameter_is_control(port) && _lv2->parameter_is_input(port)) {
parameter_update(port, _values[port]);
}
}
}
_lv2->ParameterChanged.connect (parameter_connection, ui_bind (&LV2PluginUI::parameter_changed, this, _1, _2), gui_context());
}
LV2PluginUI::~LV2PluginUI ()
{
//cout << "LV2PluginUI destructor called" << endl;
if (_values) {
delete[] _values;
}
// plugin destructor destroys the GTK GUI
}
int
LV2PluginUI::get_preferred_height ()
{
Gtk::Requisition r = size_request();
return r.height;
}
int
LV2PluginUI::get_preferred_width ()
{
Gtk::Requisition r = size_request();
return r.width;
}
int
LV2PluginUI::package (Gtk::Window& win)
{
//cout << "package" << endl;
if (_external_ui_ptr) {
_win_ptr = &win;
} else {
/* forward configure events to plugin window */
win.signal_configure_event().connect (sigc::mem_fun (*this, &LV2PluginUI::configure_handler));
win.signal_map_event().connect (sigc::mem_fun (*this, &LV2PluginUI::start_updating));
win.signal_unmap_event().connect (sigc::mem_fun (*this, &LV2PluginUI::stop_updating));
}
return 0;
}
bool
LV2PluginUI::configure_handler (GdkEventConfigure*)
{
std::cout << "CONFIGURE" << std::endl;
return false;
}
bool
LV2PluginUI::is_update_wanted(uint32_t /*index*/)
{
/* FIXME this should check the port notification properties, which nobody sets now anyway :) */
return true;
}
bool
LV2PluginUI::on_window_show(const Glib::ustring& title)
{
//cout << "on_window_show - " << title << endl; flush(cout);
if (_lv2->is_external_ui()) {
if (_external_ui_ptr) {
LV2_EXTERNAL_UI_SHOW(_external_ui_ptr);
return false;
}
lv2ui_instantiate(title);
if (!_external_ui_ptr) {
return false;
}
LV2_EXTERNAL_UI_SHOW(_external_ui_ptr);
_screen_update_connection.disconnect();
_screen_update_connection = ARDOUR_UI::instance()->RapidScreenUpdate.connect
(sigc::mem_fun(*this, &LV2PluginUI::output_update));
return false;
}
return true;
}
void
LV2PluginUI::on_window_hide()
{
//cout << "on_window_hide" << endl; flush(cout);
if (_external_ui_ptr) {
LV2_EXTERNAL_UI_HIDE(_external_ui_ptr);
//slv2_ui_instance_get_descriptor(_inst)->cleanup(_inst);
//_external_ui_ptr = NULL;
//_screen_update_connection.disconnect();
}
}