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bfa04c987d
* Centralize standard LMMS plugin logo Previously, every single plugin would have its own copy of this image. Now, these plugins pull it from the theme. I'm not sure it's valuable for this to be themeable, but AFAIK it's the place all the other non-plugin resources are stored, so that's where it goes for now.
122 lines
3.6 KiB
C++
122 lines
3.6 KiB
C++
/*
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* Analyzer.cpp - definition of Analyzer class.
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*
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* Copyright (c) 2019 Martin Pavelek <he29/dot/HS/at/gmail/dot/com>
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*
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* Based partially on Eq plugin code,
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* Copyright (c) 2014-2017, David French <dave/dot/french3/at/googlemail/dot/com>
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*
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* This file is part of LMMS - https://lmms.io
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#include "Analyzer.h"
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#ifdef SA_DEBUG
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#include <chrono>
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#include <iostream>
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#endif
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#include "embed.h"
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#include "LmmsTypes.h"
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#include "plugin_export.h"
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namespace lmms
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{
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extern "C" {
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Plugin::Descriptor PLUGIN_EXPORT analyzer_plugin_descriptor =
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{
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"spectrumanalyzer",
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"Spectrum Analyzer",
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QT_TRANSLATE_NOOP("PluginBrowser", "A graphical spectrum analyzer."),
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"Martin Pavelek <he29/dot/HS/at/gmail/dot/com>",
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0x0112,
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Plugin::Type::Effect,
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new PixmapLoader("lmms-plugin-logo"),
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nullptr,
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nullptr,
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};
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}
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Analyzer::Analyzer(Model *parent, const Plugin::Descriptor::SubPluginFeatures::Key *key) :
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Effect(&analyzer_plugin_descriptor, parent, key),
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m_processor(&m_controls),
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m_controls(this),
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m_processorThread(m_processor, m_inputBuffer),
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// Buffer is sized to cover 4* the current maximum LMMS audio buffer size,
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// so that it has some reserve space in case data processor is busy.
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m_inputBuffer(4 * m_maxBufferSize)
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{
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m_processorThread.start();
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}
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Analyzer::~Analyzer()
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{
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m_processor.terminate();
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m_inputBuffer.wakeAll();
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m_processorThread.wait();
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}
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// Take audio data and pass them to the spectrum processor.
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Effect::ProcessStatus Analyzer::processImpl(SampleFrame* buf, const fpp_t frames)
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{
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// Measure time spent in audio thread; both average and peak should be well under 1 ms.
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#ifdef SA_DEBUG
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unsigned int audio_time = std::chrono::high_resolution_clock::now().time_since_epoch().count();
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if (audio_time - m_last_dump_time > 5000000000) // print every 5 seconds
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{
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std::cout << "Analyzer audio thread: " << m_sum_execution / m_dump_count << " ms avg / "
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<< m_max_execution << " ms peak." << std::endl;
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m_last_dump_time = audio_time;
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m_sum_execution = m_max_execution = m_dump_count = 0;
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}
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#endif
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// Skip processing if the controls dialog isn't visible, it would only waste CPU cycles.
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if (m_controls.isViewVisible())
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{
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// To avoid processing spikes on audio thread, data are stored in
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// a lockless ringbuffer and processed in a separate thread.
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m_inputBuffer.write(buf, frames, true);
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}
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#ifdef SA_DEBUG
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audio_time = std::chrono::high_resolution_clock::now().time_since_epoch().count() - audio_time;
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m_dump_count++;
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m_sum_execution += audio_time / 1000000.0;
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if (audio_time / 1000000.0 > m_max_execution) {m_max_execution = audio_time / 1000000.0;}
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#endif
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return ProcessStatus::Continue;
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}
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extern "C" {
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// needed for getting plugin out of shared lib
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PLUGIN_EXPORT Plugin *lmms_plugin_main(Model *parent, void *data)
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{
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return new Analyzer(parent, static_cast<const Plugin::Descriptor::SubPluginFeatures::Key *>(data));
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}
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}
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} // namespace lmms
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