Line data    Source code

       1              : /*
       2              :  * SPDX-License-Identifier: GPL-3.0-only
       3              :  * MuseScore-CLA-applies
       4              :  *
       5              :  * MuseScore Studio
       6              :  * Music Composition & Notation
       7              :  *
       8              :  * Copyright (C) 2021 MuseScore Limited and others
       9              :  *
      10              :  * This program is free software: you can redistribute it and/or modify
      11              :  * it under the terms of the GNU General Public License version 3 as
      12              :  * published by the Free Software Foundation.
      13              :  *
      14              :  * This program is distributed in the hope that it will be useful,
      15              :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      16              :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      17              :  * GNU General Public License for more details.
      18              :  *
      19              :  * You should have received a copy of the GNU General Public License
      20              :  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
      21              :  */
      22              : #ifndef MUSE_VST_VSTCOMPONENTHANDLER_H
      23              : #define MUSE_VST_VSTCOMPONENTHANDLER_H
      24              : 
      25              : #include <atomic>
      26              : 
      27              : #include "async/notification.h"
      28              : #include "async/channel.h"
      29              : 
      30              : #include "vsttypes.h"
      31              : 
      32              : namespace muse::vst {
      33              : class VstAdvancedHandler : public IAdvancedComponentHandler
      34              : {
      35              :     DECLARE_FUNKNOWN_METHODS
      36              : public:
      37              :     VstAdvancedHandler(async::Notification notifier);
      38            0 :     virtual ~VstAdvancedHandler() = default;
      39              : 
      40              :     void setSuppressNotify(bool suppress);
      41              :     bool suppressNotify() const;
      42              : 
      43              :     Steinberg::tresult setDirty(Steinberg::TBool state) override;
      44              :     Steinberg::tresult requestOpenEditor(Steinberg::FIDString name) override;
      45              :     Steinberg::tresult startGroupEdit() override;
      46              :     Steinberg::tresult finishGroupEdit() override;
      47              : 
      48              : private:
      49              :     async::Notification m_paramsChanged;
      50              :     std::atomic_bool m_suppressNotify = false;
      51              : };
      52              : 
      53              : class VstComponentHandler : public IComponentHandler
      54              : {
      55              :     DECLARE_FUNKNOWN_METHODS
      56              : public:
      57              :     VstComponentHandler();
      58            0 :     virtual ~VstComponentHandler() = default;
      59              : 
      60              :     async::Channel<PluginParamId, PluginParamValue> pluginParamChanged() const;
      61              :     async::Notification pluginParamsChanged() const;
      62              : 
      63              :     // Suppress pluginParamsChanged() while applying config programmatically,
      64              :     // to avoid triggering a rescan of the state we are currently writing
      65              :     void setSuppressNotify(bool suppress);
      66              : 
      67              : private:
      68              :     Steinberg::tresult beginEdit(Steinberg::Vst::ParamID id) override;
      69              :     Steinberg::tresult performEdit(Steinberg::Vst::ParamID id, Steinberg::Vst::ParamValue valueNormalized) override;
      70              :     Steinberg::tresult endEdit(Steinberg::Vst::ParamID id) override;
      71              :     Steinberg::tresult restartComponent(Steinberg::int32 flags) override;
      72              : 
      73              :     async::Channel<PluginParamId, PluginParamValue> m_paramChanged;
      74              :     async::Notification m_paramsChangedNotify;
      75              : 
      76              :     Steinberg::FUnknownPtr<VstAdvancedHandler> m_advancedHandler = nullptr;
      77              : };
      78              : }
      79              : 
      80              : #endif // MUSE_VST_VSTCOMPONENTHANDLER_H