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/*************************************************************************** |
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* * |
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* Copyright (C) 2005, 2006 Christian Schoenebeck * |
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* * |
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* This library is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This library 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 * |
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* GNU 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 License * |
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* along with this library; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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#include "InstrumentManagerThread.h" |
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namespace LinuxSampler { |
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InstrumentManagerThread::InstrumentManagerThread() : Thread(true, false, 0, -4) { |
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pQueue = new RingBuffer<command_t,true>(INSTRUMENT_LOADER_QUEUE_SIZE); |
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} |
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InstrumentManagerThread::~InstrumentManagerThread() { |
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if (pQueue) delete pQueue; |
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} |
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/** |
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* @brief Order loading of a new instrument. |
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* |
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* The request will go into a queue waiting to be processed by the |
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* class internal task thread. This method will immediately return and |
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* the instrument will be loaded in the background. |
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* |
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* @param Filename - file name of the instrument |
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* @param uiInstrumentIndex - index of the instrument within the file |
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* @param pEngineChannel - engine channel on which the instrument should be loaded |
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*/ |
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void InstrumentManagerThread::StartNewLoad(String Filename, uint uiInstrumentIndex, EngineChannel* pEngineChannel) { |
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dmsg(1,("Scheduling '%s' (Index=%d) to be loaded in background (if not loaded yet).",Filename.c_str(),uiInstrumentIndex)); |
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// already tell the engine which instrument to load |
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pEngineChannel->PrepareLoadInstrument(Filename.c_str(), uiInstrumentIndex); |
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command_t cmd; |
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cmd.type = command_t::DIRECT_LOAD; |
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cmd.pEngineChannel = pEngineChannel; |
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pQueue->push(&cmd); |
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StartThread(); // ensure thread is running |
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conditionJobsLeft.Set(true); // wake up thread |
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} |
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/** |
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* @brief Order changing the life-time strategy of an instrument. |
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* |
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* The request will go into a queue waiting to be processed by the |
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* class internal task thread. This method will immediately return and |
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* in case the instrument has to be loaded due to a mode change to |
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* PERSISTENT, it will be loaded in the background. |
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* |
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* @param pManager - InstrumentManager which manages the instrument |
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* @param ID - unique ID of the instrument |
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* @param Mode - life-time strategy to set for this instrument |
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*/ |
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void InstrumentManagerThread::StartSettingMode(InstrumentManager* pManager, const InstrumentManager::instrument_id_t& ID, InstrumentManager::mode_t Mode) { |
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command_t cmd; |
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cmd.type = command_t::INSTR_MODE; |
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cmd.pManager = pManager; |
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cmd.instrumentId = ID; |
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cmd.mode = Mode; |
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pQueue->push(&cmd); |
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StartThread(); // ensure thread is running |
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conditionJobsLeft.Set(true); // wake up thread |
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} |
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// Entry point for the task thread. |
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int InstrumentManagerThread::Main() { |
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while (true) { |
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while (pQueue->read_space()) { |
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command_t cmd; |
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pQueue->pop(&cmd); |
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try { |
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switch (cmd.type) { |
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case command_t::DIRECT_LOAD: |
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cmd.pEngineChannel->LoadInstrument(); |
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break; |
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case command_t::INSTR_MODE: |
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cmd.pManager->SetMode(cmd.instrumentId, cmd.mode); |
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break; |
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default: |
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std::cerr << "InstrumentManagerThread: unknown command - BUG!\n" << std::flush; |
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} |
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} |
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catch (Exception e) { |
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e.PrintMessage(); |
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} |
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} |
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// nothing left to do, sleep until new jobs arrive |
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conditionJobsLeft.WaitIf(false); |
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// reset flag |
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conditionJobsLeft.Set(false); |
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// unlock condition object so it can be turned again by other thread |
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conditionJobsLeft.Unlock(); |
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} |
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} |
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} // namespace LinuxSampler |