mirror of
https://github.com/ZDoom/gzdoom.git
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cfe89ef6e6
Currently all it contains are the MIDI sources and the MIDI devices, the rest needs to be reworked first.
320 lines
9.4 KiB
C++
320 lines
9.4 KiB
C++
/*
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** music_opl_mididevice.cpp
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** Provides an emulated OPL implementation of a MIDI output device.
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**
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**---------------------------------------------------------------------------
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** Copyright 2008 Randy Heit
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** All rights reserved.
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**
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** Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions
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** are met:
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**
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** 1. Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** 2. Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in the
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** documentation and/or other materials provided with the distribution.
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** 3. The name of the author may not be used to endorse or promote products
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** derived from this software without specific prior written permission.
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**
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** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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**---------------------------------------------------------------------------
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**
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**
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*/
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// HEADER FILES ------------------------------------------------------------
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#include "mididevice.h"
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#include "zmusic/mus2midi.h"
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#include "oplsynth/opl.h"
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#include "oplsynth/opl_mus_player.h"
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// MACROS ------------------------------------------------------------------
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// EXTERNAL FUNCTION PROTOTYPES --------------------------------------------
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// PUBLIC FUNCTION PROTOTYPES ----------------------------------------------
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// PRIVATE FUNCTION PROTOTYPES ---------------------------------------------
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// EXTERNAL DATA DECLARATIONS ----------------------------------------------
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// PRIVATE DATA DEFINITIONS ------------------------------------------------
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// OPL implementation of a MIDI output device -------------------------------
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class OPLMIDIDevice : public SoftSynthMIDIDevice, protected OPLmusicBlock
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{
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public:
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OPLMIDIDevice(const OPLMidiConfig *config);
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int OpenRenderer();
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void Close();
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int GetTechnology() const;
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std::string GetStats() override;
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protected:
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void CalcTickRate();
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int PlayTick();
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void HandleEvent(int status, int parm1, int parm2);
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void HandleLongEvent(const uint8_t *data, int len);
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void ComputeOutput(float *buffer, int len);
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bool ServiceStream(void *buff, int numbytes);
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int GetDeviceType() const override { return MDEV_OPL; }
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};
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// PUBLIC DATA DEFINITIONS -------------------------------------------------
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// CODE --------------------------------------------------------------------
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//==========================================================================
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//
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// OPLMIDIDevice Contructor
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//
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//==========================================================================
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OPLMIDIDevice::OPLMIDIDevice(const OPLMidiConfig *config)
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: SoftSynthMIDIDevice((int)OPL_SAMPLE_RATE), OPLmusicBlock(config->core, config->numchips)
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{
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FullPan = config->fullpan;
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memcpy(OPLinstruments, config->OPLinstruments, sizeof(OPLinstruments));
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StreamBlockSize = 14;
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}
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//==========================================================================
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//
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// OPLMIDIDevice :: Open
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//
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// Returns 0 on success.
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//
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//==========================================================================
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int OPLMIDIDevice::OpenRenderer()
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{
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if (io == NULL || 0 == (NumChips = io->Init(currentCore, NumChips, FullPan, true)))
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{
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return 1;
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}
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isMono = !FullPan && !io->IsOPL3;
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stopAllVoices();
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resetAllControllers(100);
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return 0;
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}
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//==========================================================================
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//
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// OPLMIDIDevice :: Close
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//
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//==========================================================================
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void OPLMIDIDevice::Close()
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{
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SoftSynthMIDIDevice::Close();
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io->Reset();
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}
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//==========================================================================
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//
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// OPLMIDIDevice :: GetTechnology
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//
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//==========================================================================
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int OPLMIDIDevice::GetTechnology() const
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{
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return MIDIDEV_FMSYNTH;
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}
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//==========================================================================
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//
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// OPLMIDIDevice :: CalcTickRate
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//
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// Tempo is the number of microseconds per quarter note.
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// Division is the number of ticks per quarter note.
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//
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//==========================================================================
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void OPLMIDIDevice::CalcTickRate()
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{
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SoftSynthMIDIDevice::CalcTickRate();
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io->SetClockRate(OPLmusicBlock::SamplesPerTick = SoftSynthMIDIDevice::SamplesPerTick);
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}
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//==========================================================================
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//
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// OPLMIDIDevice :: PlayTick
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//
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// We derive from two base classes that both define PlayTick(), so we need
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// to be unambiguous about which one to use.
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//
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//==========================================================================
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int OPLMIDIDevice::PlayTick()
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{
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return SoftSynthMIDIDevice::PlayTick();
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}
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//==========================================================================
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//
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// OPLMIDIDevice :: HandleEvent
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//
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// Processes a normal MIDI event.
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//
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//==========================================================================
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void OPLMIDIDevice::HandleEvent(int status, int parm1, int parm2)
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{
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int command = status & 0xF0;
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int channel = status & 0x0F;
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// Swap voices 9 and 15, because their roles are reversed
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// in MUS and MIDI formats.
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if (channel == 9)
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{
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channel = 15;
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}
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else if (channel == 15)
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{
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channel = 9;
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}
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switch (command)
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{
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case MIDI_NOTEOFF:
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playingcount--;
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noteOff(channel, parm1);
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break;
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case MIDI_NOTEON:
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playingcount++;
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noteOn(channel, parm1, parm2);
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break;
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case MIDI_POLYPRESS:
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//DEBUGOUT("Unhandled note aftertouch: Channel %d, note %d, value %d\n", channel, parm1, parm2);
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break;
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case MIDI_CTRLCHANGE:
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switch (parm1)
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{
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// some controllers here get passed on but are not handled by the player.
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//case 0: changeBank(channel, parm2); break;
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case 1: changeModulation(channel, parm2); break;
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case 6: changeExtended(channel, ctrlDataEntryHi, parm2); break;
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case 7: changeVolume(channel, parm2, false); break;
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case 10: changePanning(channel, parm2); break;
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case 11: changeVolume(channel, parm2, true); break;
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case 38: changeExtended(channel, ctrlDataEntryLo, parm2); break;
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case 64: changeSustain(channel, parm2); break;
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//case 67: changeSoftPedal(channel, parm2); break;
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//case 91: changeReverb(channel, parm2); break;
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//case 93: changeChorus(channel, parm2); break;
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case 98: changeExtended(channel, ctrlNRPNLo, parm2); break;
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case 99: changeExtended(channel, ctrlNRPNHi, parm2); break;
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case 100: changeExtended(channel, ctrlRPNLo, parm2); break;
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case 101: changeExtended(channel, ctrlRPNHi, parm2); break;
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case 120: allNotesOff(channel, parm2); break;
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case 121: resetControllers(channel, 100); break;
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case 123: notesOff(channel, parm2); break;
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//case 126: changeMono(channel, parm2); break;
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//case 127: changePoly(channel, parm2); break;
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default:
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//DEBUGOUT("Unhandled controller: Channel %d, controller %d, value %d\n", channel, parm1, parm2);
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break;
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}
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break;
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case MIDI_PRGMCHANGE:
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programChange(channel, parm1);
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break;
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case MIDI_CHANPRESS:
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//DEBUGOUT("Unhandled channel aftertouch: Channel %d, value %d\n", channel, parm1, 0);
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break;
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case MIDI_PITCHBEND:
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changePitch(channel, parm1, parm2);
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break;
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}
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}
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//==========================================================================
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//
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// OPLMIDIDevice :: HandleLongEvent
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//
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//==========================================================================
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void OPLMIDIDevice::HandleLongEvent(const uint8_t *data, int len)
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{
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}
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//==========================================================================
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//
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// OPLMIDIDevice :: ComputeOutput
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//
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// We override ServiceStream, so this function is never actually called.
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//
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//==========================================================================
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void OPLMIDIDevice::ComputeOutput(float *buffer, int len)
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{
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}
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//==========================================================================
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//
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// OPLMIDIDevice :: ServiceStream
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//
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//==========================================================================
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bool OPLMIDIDevice::ServiceStream(void *buff, int numbytes)
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{
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return OPLmusicBlock::ServiceStream(buff, numbytes);
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}
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//==========================================================================
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//
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// OPLMIDIDevice :: GetStats
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//
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//==========================================================================
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std::string OPLMIDIDevice::GetStats()
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{
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std::string out;
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for (uint32_t i = 0; i < io->NumChannels; ++i)
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{
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char star = '*';
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if (voices[i].index == ~0u)
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{
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star = '/';
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}
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else if (voices[i].sustained)
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{
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star = '-';
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}
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else if (voices[i].current_instr_voice == &voices[i].current_instr->voices[1])
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{
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star = '\\';
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}
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else
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{
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star = '+';
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}
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out += star;
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}
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return out;
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}
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MIDIDevice* CreateOplMIDIDevice(const OPLMidiConfig* config)
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{
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return new OPLMIDIDevice(config);
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}
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