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https://github.com/ZDoom/ZMusic.git
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160 lines
5 KiB
C++
160 lines
5 KiB
C++
#pragma once
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#include <mutex>
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#include "zmusic/midiconfig.h"
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#include "zmusic/mididefs.h"
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typedef void(*MidiCallback)(void *);
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// A device that provides a WinMM-like MIDI streaming interface -------------
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struct MidiHeader
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{
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uint8_t *lpData;
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uint32_t dwBufferLength;
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uint32_t dwBytesRecorded;
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MidiHeader *lpNext;
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};
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class MIDIDevice
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{
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public:
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MIDIDevice() = default;
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virtual ~MIDIDevice();
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void SetCallback(MidiCallback callback, void* userdata)
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{
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Callback = callback;
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CallbackData = userdata;
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}
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virtual int Open() = 0;
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virtual void Close() = 0;
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virtual bool IsOpen() const = 0;
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virtual int GetTechnology() const = 0;
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virtual int SetTempo(int tempo) = 0;
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virtual int SetTimeDiv(int timediv) = 0;
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virtual int StreamOut(MidiHeader *data) = 0;
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virtual int StreamOutSync(MidiHeader *data) = 0;
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virtual int Resume() = 0;
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virtual void Stop() = 0;
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virtual int PrepareHeader(MidiHeader *data);
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virtual int UnprepareHeader(MidiHeader *data);
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virtual bool FakeVolume();
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virtual bool Pause(bool paused) = 0;
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virtual void InitPlayback();
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virtual bool Update();
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virtual void PrecacheInstruments(const uint16_t *instruments, int count);
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virtual void ChangeSettingInt(const char *setting, int value);
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virtual void ChangeSettingNum(const char *setting, double value);
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virtual void ChangeSettingString(const char *setting, const char *value);
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virtual std::string GetStats();
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virtual int GetDeviceType() const { return MDEV_DEFAULT; }
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virtual bool CanHandleSysex() const { return true; }
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virtual SoundStreamInfoEx GetStreamInfoEx() const;
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protected:
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MidiCallback Callback;
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void* CallbackData;
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};
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// Base class for software synthesizer MIDI output devices ------------------
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class SoftSynthMIDIDevice : public MIDIDevice
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{
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friend class MIDIWaveWriter;
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public:
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SoftSynthMIDIDevice(int samplerate, int minrate = 1, int maxrate = 1000000 /* something higher than any valid value */);
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~SoftSynthMIDIDevice();
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void Close() override;
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bool IsOpen() const override;
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int GetTechnology() const override;
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int SetTempo(int tempo) override;
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int SetTimeDiv(int timediv) override;
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int StreamOut(MidiHeader *data) override;
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int StreamOutSync(MidiHeader *data) override;
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int Resume() override;
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void Stop() override;
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bool Pause(bool paused) override;
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virtual int Open() override;
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virtual bool ServiceStream(void* buff, int numbytes);
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int GetSampleRate() const { return SampleRate; }
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SoundStreamInfoEx GetStreamInfoEx() const override;
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protected:
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double Tempo;
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double Division;
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double SamplesPerTick;
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double NextTickIn;
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MidiHeader *Events;
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bool Started;
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bool isMono = false; // only relevant for OPL.
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bool isOpen = false;
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uint32_t Position;
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int SampleRate;
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int StreamBlockSize = 2;
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virtual void CalcTickRate();
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int PlayTick();
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virtual int OpenRenderer() = 0;
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virtual void HandleEvent(int status, int parm1, int parm2) = 0;
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virtual void HandleLongEvent(const uint8_t *data, int len) = 0;
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virtual void ComputeOutput(float *buffer, int len) = 0;
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};
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// Internal disk writing version of a MIDI device ------------------
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class MIDIWaveWriter : public SoftSynthMIDIDevice
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{
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public:
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MIDIWaveWriter(const char *filename, SoftSynthMIDIDevice *devtouse);
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//~MIDIWaveWriter();
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bool CloseFile();
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int Resume() override;
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int Open() override
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{
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playDevice->SetCallback(Callback, CallbackData);
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return playDevice->Open();
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}
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int OpenRenderer() override { return playDevice->OpenRenderer(); }
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void Stop() override;
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void HandleEvent(int status, int parm1, int parm2) override { playDevice->HandleEvent(status, parm1, parm2); }
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void HandleLongEvent(const uint8_t *data, int len) override { playDevice->HandleLongEvent(data, len); }
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void ComputeOutput(float *buffer, int len) override { playDevice->ComputeOutput(buffer, len); }
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int StreamOutSync(MidiHeader *data) override { return playDevice->StreamOutSync(data); }
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int StreamOut(MidiHeader *data) override { return playDevice->StreamOut(data); }
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int GetDeviceType() const override { return playDevice->GetDeviceType(); }
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bool ServiceStream (void *buff, int numbytes) override { return playDevice->ServiceStream(buff, numbytes); }
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int GetTechnology() const override { return playDevice->GetTechnology(); }
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int SetTempo(int tempo) override { return playDevice->SetTempo(tempo); }
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int SetTimeDiv(int timediv) override { return playDevice->SetTimeDiv(timediv); }
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bool IsOpen() const override { return playDevice->IsOpen(); }
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void CalcTickRate() override { playDevice->CalcTickRate(); }
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protected:
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FILE *File;
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SoftSynthMIDIDevice *playDevice;
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};
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// MIDI devices
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MIDIDevice *CreateFluidSynthMIDIDevice(int samplerate, const char *Args);
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MIDIDevice *CreateADLMIDIDevice(const char* args);
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MIDIDevice *CreateOPNMIDIDevice(const char *args);
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MIDIDevice *CreateOplMIDIDevice(const char* Args);
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MIDIDevice *CreateTimidityMIDIDevice(const char* Args, int samplerate);
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MIDIDevice *CreateTimidityPPMIDIDevice(const char *Args, int samplerate);
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MIDIDevice *CreateWildMIDIDevice(const char *Args, int samplerate);
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#ifdef _WIN32
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MIDIDevice* CreateWinMIDIDevice(int mididevice);
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#endif
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#ifdef __linux__
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MIDIDevice* CreateAlsaMIDIDevice(int mididevice);
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#endif
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