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89 lines
2.2 KiB
89 lines
2.2 KiB
3 weeks ago
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// udpmidi.cpp
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//
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// mt32-pi - A baremetal MIDI synthesizer for Raspberry Pi
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// Copyright (C) 2020-2023 Dale Whinham <daleyo@gmail.com>
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//
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// This file is part of mt32-pi.
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//
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// mt32-pi is free software: you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the Free Software
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// Foundation, either version 3 of the License, or (at your option) any later
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// version.
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//
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// mt32-pi is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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// details.
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//
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// You should have received a copy of the GNU General Public License along with
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// mt32-pi. If not, see <http://www.gnu.org/licenses/>.
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//
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#include <circle/logger.h>
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#include <circle/net/in.h>
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#include <circle/net/netsubsystem.h>
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#include <circle/sched/scheduler.h>
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#include "udpmidi.h"
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LOGMODULE("udpmidi");
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constexpr u16 MIDIPort = 1999;
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CUDPMIDIReceiver::CUDPMIDIReceiver(CUDPMIDIHandler* pHandler)
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: CTask(TASK_STACK_SIZE, true),
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m_pMIDISocket(nullptr),
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m_MIDIBuffer{0},
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m_pHandler(pHandler)
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{
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}
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CUDPMIDIReceiver::~CUDPMIDIReceiver()
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{
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if (m_pMIDISocket)
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delete m_pMIDISocket;
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}
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bool CUDPMIDIReceiver::Initialize()
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{
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assert(m_pMIDISocket == nullptr);
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CNetSubSystem* const pNet = CNetSubSystem::Get();
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if ((m_pMIDISocket = new CSocket(pNet, IPPROTO_UDP)) == nullptr)
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return false;
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if (m_pMIDISocket->Bind(MIDIPort) != 0)
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{
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LOGERR("Couldn't bind to port %d", MIDIPort);
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return false;
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}
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// We started as a suspended task; run now that initialization is successful
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Start();
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return true;
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}
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void CUDPMIDIReceiver::Run()
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{
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assert(m_pHandler != nullptr);
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assert(m_pMIDISocket != nullptr);
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CScheduler* const pScheduler = CScheduler::Get();
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while (true)
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{
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// Blocking call
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const int nMIDIResult = m_pMIDISocket->Receive(m_MIDIBuffer, sizeof(m_MIDIBuffer), 0);
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if (nMIDIResult < 0)
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LOGERR("MIDI socket receive error: %d", nMIDIResult);
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else if (nMIDIResult > 0)
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m_pHandler->OnUDPMIDIDataReceived(m_MIDIBuffer, nMIDIResult);
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// Allow other tasks to run
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pScheduler->Yield();
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}
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}
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