mirror of
https://github.com/ZDoom/ZMusic.git
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256 lines
7 KiB
C++
256 lines
7 KiB
C++
/*
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** music_opnmidi_mididevice.cpp
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** Provides access to libOPNMIDI as a generic MIDI 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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// HEADER FILES ------------------------------------------------------------
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#include "mididevice.h"
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#include "zmusic/zmusic_internal.h"
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#ifdef HAVE_OPN
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#include "opnmidi.h"
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OpnConfig opnConfig;
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class OPNMIDIDevice : public SoftSynthMIDIDevice
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{
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struct OPN2_MIDIPlayer *Renderer;
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public:
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OPNMIDIDevice(const char *bank);
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~OPNMIDIDevice();
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int OpenRenderer() override;
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int GetDeviceType() const override { return MDEV_OPN; }
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protected:
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void HandleEvent(int status, int parm1, int parm2) override;
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void HandleLongEvent(const uint8_t *data, int len) override;
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void ComputeOutput(float *buffer, int len) override;
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private:
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int LoadCustomBank(const char *bankfile);
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};
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enum
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{
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ME_NOTEOFF = 0x80,
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ME_NOTEON = 0x90,
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ME_KEYPRESSURE = 0xA0,
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ME_CONTROLCHANGE = 0xB0,
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ME_PROGRAM = 0xC0,
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ME_CHANNELPRESSURE = 0xD0,
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ME_PITCHWHEEL = 0xE0
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};
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//==========================================================================
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//
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// OPNMIDIDevice Constructor
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//
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//==========================================================================
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#include "data/xg.h"
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OPNMIDIDevice::OPNMIDIDevice(const char *bank)
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:SoftSynthMIDIDevice(44100)
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{
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Renderer = opn2_init(44100); // todo: make it configurable
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if (Renderer != nullptr)
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{
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if (!opnConfig.opn_use_custom_bank || !LoadCustomBank(opnConfig.opn_custom_bank.c_str()))
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{
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if(opnConfig.default_bank.size() == 0)
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{
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opn2_openBankData(Renderer, xg_default, 62080);
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}
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else opn2_openBankData(Renderer, opnConfig.default_bank.data(), (long)opnConfig.default_bank.size());
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}
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opn2_switchEmulator(Renderer, (int)opnConfig.opn_emulator_id);
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opn2_setRunAtPcmRate(Renderer, (int)opnConfig.opn_run_at_pcm_rate);
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opn2_setNumChips(Renderer, opnConfig.opn_chips_count);
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opn2_setSoftPanEnabled(Renderer, (int)opnConfig.opn_fullpan);
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}
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else
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{
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throw std::runtime_error("Unable to create OPN renderer.");
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}
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}
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//==========================================================================
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//
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// OPNMIDIDevice Destructor
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//
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//==========================================================================
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OPNMIDIDevice::~OPNMIDIDevice()
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{
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Close();
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if (Renderer != nullptr)
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{
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opn2_close(Renderer);
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}
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}
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//==========================================================================
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//
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// OPNMIDIDevice :: LoadCustomBank
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//
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// Loads a custom WOPN bank for libOPNMIDI. Returns 1 when bank has been
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// loaded, otherwise, returns 0 when custom banks are disabled or failed
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//
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//==========================================================================
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int OPNMIDIDevice::LoadCustomBank(const char *bankfile)
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{
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if(!bankfile || !*bankfile)
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return 0;
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return (opn2_openBankFile(Renderer, bankfile) == 0);
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}
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//==========================================================================
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//
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// OPNMIDIDevice :: 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 OPNMIDIDevice::OpenRenderer()
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{
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opn2_rt_resetState(Renderer);
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return 0;
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}
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//==========================================================================
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//
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// OPNMIDIDevice :: HandleEvent
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//
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//==========================================================================
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void OPNMIDIDevice::HandleEvent(int status, int parm1, int parm2)
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{
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int command = status & 0xF0;
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int chan = status & 0x0F;
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switch (command)
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{
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case ME_NOTEON:
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opn2_rt_noteOn(Renderer, chan, parm1, parm2);
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break;
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case ME_NOTEOFF:
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opn2_rt_noteOff(Renderer, chan, parm1);
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break;
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case ME_KEYPRESSURE:
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opn2_rt_noteAfterTouch(Renderer, chan, parm1, parm2);
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break;
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case ME_CONTROLCHANGE:
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opn2_rt_controllerChange(Renderer, chan, parm1, parm2);
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break;
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case ME_PROGRAM:
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opn2_rt_patchChange(Renderer, chan, parm1);
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break;
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case ME_CHANNELPRESSURE:
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opn2_rt_channelAfterTouch(Renderer, chan, parm1);
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break;
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case ME_PITCHWHEEL:
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opn2_rt_pitchBendML(Renderer, chan, parm2, parm1);
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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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// OPNMIDIDevice :: HandleLongEvent
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//
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//==========================================================================
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void OPNMIDIDevice::HandleLongEvent(const uint8_t *data, int len)
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{
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}
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static const OPNMIDI_AudioFormat audio_output_format =
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{
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OPNMIDI_SampleType_F32,
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sizeof(float),
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2 * sizeof(float)
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};
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//==========================================================================
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//
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// OPNMIDIDevice :: ComputeOutput
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//
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//==========================================================================
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void OPNMIDIDevice::ComputeOutput(float *buffer, int len)
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{
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OPN2_UInt8* left = reinterpret_cast<OPN2_UInt8*>(buffer);
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OPN2_UInt8* right = reinterpret_cast<OPN2_UInt8*>(buffer + 1);
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opn2_generateFormat(Renderer, len * 2, left, right, &audio_output_format);
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}
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//==========================================================================
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//
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//
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//
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//==========================================================================
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MIDIDevice *CreateOPNMIDIDevice(const char *Args)
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{
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const char* bank = Args && *Args ? Args : opnConfig.opn_use_custom_bank ? opnConfig.opn_custom_bank.c_str() : nullptr;
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if (bank && *bank)
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{
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if (musicCallbacks.PathForSoundfont)
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{
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auto info = musicCallbacks.PathForSoundfont(bank, SF_WOPN);
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if (info != nullptr) bank = info;
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}
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}
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return new OPNMIDIDevice(bank);
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}
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#else
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MIDIDevice* CreateOPNMIDIDevice(const char* Args)
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{
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throw std::runtime_error("OPN device not supported in this configuration");
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}
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#endif
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