From 70fd2d85c1bd6fb8732e680e8fda9d36c317c732 Mon Sep 17 00:00:00 2001
From: Chris Xiong <chirs241097@gmail.com>
Date: Wed, 6 Apr 2016 16:54:29 +0800
Subject: Too young too simple.

---
 core/qmpmidiplay.cpp | 404 +++++++++++++++++++++++++++++++++++++++++++++++++++
 core/qmpmidiplay.hpp | 137 +++++++++++++++++
 core/qmpmidiread.cpp | 239 ++++++++++++++++++++++++++++++
 3 files changed, 780 insertions(+)
 create mode 100644 core/qmpmidiplay.cpp
 create mode 100644 core/qmpmidiplay.hpp
 create mode 100644 core/qmpmidiread.cpp

(limited to 'core')

diff --git a/core/qmpmidiplay.cpp b/core/qmpmidiplay.cpp
new file mode 100644
index 0000000..6f69e33
--- /dev/null
+++ b/core/qmpmidiplay.cpp
@@ -0,0 +1,404 @@
+#include <cstdio>
+#include <chrono>
+#include <thread>
+#include <fluidsynth.h>
+#include "qmpmidiplay.hpp"
+#ifdef _WIN32
+#include <windows.h>
+uint64_t pf;
+#endif
+void CMidiPlayer::fluidPreInitialize()
+{
+	settings=new_fluid_settings();
+}
+void CMidiPlayer::fluidInitialize()
+{
+	synth=new_fluid_synth(settings);
+	adriver=new_fluid_audio_driver(settings,synth);
+	fluid_synth_set_chorus(synth,FLUID_CHORUS_DEFAULT_N,FLUID_CHORUS_DEFAULT_LEVEL,
+						   FLUID_CHORUS_DEFAULT_SPEED,FLUID_CHORUS_DEFAULT_DEPTH,
+						   FLUID_CHORUS_DEFAULT_TYPE);
+#ifndef _WIN32
+	if(!singleInstance)
+	{
+		if(midiFile->getStandard()==4)
+		fluid_synth_set_channel_type(synth,9,CHANNEL_TYPE_MELODIC);
+		else if(midiFile->getStandard()==1)
+			fluid_synth_set_channel_type(synth,9,CHANNEL_TYPE_DRUM);
+		else
+		{
+			fluid_synth_set_channel_type(synth,9,CHANNEL_TYPE_DRUM);
+			fluid_synth_bank_select(synth,9,128);
+		}
+	}
+#endif
+}
+void CMidiPlayer::fluidDeinitialize()
+{
+	if(!synth||!adriver||!settings)return;
+	delete_fluid_settings(settings);
+	delete_fluid_audio_driver(adriver);
+	delete_fluid_synth(synth);
+	settings=NULL;synth=NULL;adriver=NULL;
+}
+void CMidiPlayer::processEvent(const SEvent *e)
+{
+	switch(e->type&0xF0)
+	{
+		case 0x80://Note off
+			fluid_synth_noteoff(synth,e->type&0x0F,e->p1);
+		break;
+		case 0x90://Note on
+			if((mute>>(e->type&0x0F))&1)break;//muted
+			if(solo&&!((solo>>(e->type&0x0F))&1))break;
+			fluid_synth_noteon(synth,e->type&0x0F,e->p1,e->p2);
+		break;
+		case 0xB0://CC
+			if(e->p1==100)rpnid=e->p2;
+			if(e->p1==6)rpnval=e->p2;
+			if(~rpnid&&~rpnval)
+			{
+				if(rpnid==0)fluid_synth_pitch_wheel_sens(synth,e->type&0x0F,rpnval);
+				rpnid=rpnval=-1;
+			}
+			fluid_synth_cc(synth,e->type&0x0F,e->p1,e->p2);
+		break;
+		case 0xC0://PC
+			fluid_synth_program_change(synth,e->type&0x0F,e->p1);
+		break;
+		case 0xE0://PW
+			fluid_synth_pitch_bend(synth,e->type&0x0F,e->p1);
+		break;
+		case 0xF0://Meta/SysEx
+			if((e->type&0x0F)==0x0F)
+			{
+				switch(e->p1)
+				{
+					case 0x51:
+						ctempo=e->p2;dpt=ctempo*1000/divs;
+					break;
+					case 0x58:
+						ctsn=e->p2>>24;
+						ctsd=1<<((e->p2>>16)&0xFF);
+					break;
+					case 0x59:
+						cks=e->p2;
+					break;
+					case 0x01:case 0x02:case 0x03:
+					case 0x04:case 0x05:case 0x06:
+					case 0x07:
+						//if(e->str)puts(e->str);
+					break;
+				}
+			}
+			if((e->type&0x0F)==0x00||(e->type&0x0F)==07)
+			{
+				int io=0;
+				if(sendSysEx)fluid_synth_sysex(synth,e->str,e->p1,NULL,&io,NULL,0);
+			}
+		break;
+	}
+}
+void CMidiPlayer::processEventStub(const SEvent *e)
+{
+	switch(e->type&0xF0)
+	{
+		case 0xB0://CC
+			if(e->p1==100)rpnid=e->p2;
+			if(e->p1==6)rpnval=e->p2;
+			if(~rpnid&&~rpnval)
+			{
+				if(rpnid==0)ccc[e->type&0x0F][134]=rpnval;
+				rpnid=rpnval=-1;
+			}
+			ccc[e->type&0x0F][e->p1]=e->p2;
+		break;
+		case 0xC0://PC
+			ccc[e->type&0x0F][128]=e->p1;
+		break;
+		case 0xD0://CP
+			ccc[e->type&0x0F][129]=e->p1;
+		break;
+		case 0xE0://PW
+			ccc[e->type&0x0F][130]=e->p1;
+		break;
+		case 0xF0://Meta/SysEx
+			if((e->type&0x0F)==0x0F)
+			{
+				switch(e->p1)
+				{
+					case 0x51:
+						ctempo=e->p2;dpt=ctempo*1000/divs;
+						ccc[0][131]=dpt;
+					break;
+					case 0x58:
+						ccc[0][132]=e->p2;
+					break;
+					case 0x59:
+						ccc[0][133]=e->p2;
+					break;
+				}
+			}
+		break;
+	}
+}
+#ifdef _WIN32
+void w32usleep(uint64_t t)
+{
+	uint64_t st=0,ct=0;
+	timeBeginPeriod(1);
+	QueryPerformanceCounter((LARGE_INTEGER*)&st);
+	do{
+		if(t>10000+(ct-st)*1000000/pf)Sleep((t-(ct-st)*1000000/pf)/2000);
+		else if(t>5000+(ct-st)*1000000/pf)Sleep(1);
+		else std::this_thread::yield();
+		QueryPerformanceCounter((LARGE_INTEGER*)&ct);
+	}while((ct-st)*1000000<t*pf);
+	timeEndPeriod(1);
+}
+#endif
+void CMidiPlayer::playEvents()
+{
+	for(uint32_t ct=midiFile->getEvent(0)->time;tceptr<midiFile->getEventCount();)
+	{
+		while(tcpaused)std::this_thread::sleep_for(std::chrono::milliseconds(100));
+		while(!tcstop&&midiFile&&tceptr<midiFile->getEventCount()&&ct==midiFile->getEvent(tceptr)->time)
+			processEvent(midiFile->getEvent(tceptr++));
+		if(tcstop||!midiFile||tceptr>=midiFile->getEventCount())break;
+		if(resumed)resumed=false;
+		else
+#if 0
+		w32usleep((midiFile->getEvent(tceptr)->time-ct)*(dpt/1000));
+#else
+		std::this_thread::sleep_for(std::chrono::nanoseconds(midiFile->getEvent(tceptr)->time-ct)*dpt);
+#endif
+		if(tcstop||!midiFile)break;
+		ct=midiFile->getEvent(tceptr)->time;
+	}
+	while(!tcstop&&synth&&(waitvoice&&fluid_synth_get_active_voice_count(synth)>0))std::this_thread::sleep_for(std::chrono::milliseconds(2));
+	finished=1;
+}
+void CMidiPlayer::fileTimer1Pass()
+{
+	ftime=.0;ctempo=0x7A120;dpt=ctempo*1000/divs;
+	for(uint32_t eptr=0,ct=midiFile->getEvent(0)->time;eptr<midiFile->getEventCount();)
+	{
+		while(eptr<midiFile->getEventCount()&&ct==midiFile->getEvent(eptr)->time)
+			processEventStub(midiFile->getEvent(eptr++));
+		if(eptr>=midiFile->getEventCount())break;
+		ftime+=(midiFile->getEvent(eptr)->time-ct)*dpt/1e9;
+		ct=midiFile->getEvent(eptr)->time;
+	}
+}
+void CMidiPlayer::fileTimer2Pass()
+{
+	double ctime=.0;uint32_t c=1;ctempo=0x7A120;dpt=ctempo*1000/divs;
+	memset(stamps,0,sizeof(stamps));memset(ccstamps,0,sizeof(ccstamps));
+	memset(ccc,0,sizeof(ccc));rpnid=rpnval=-1;for(int i=0;i<16;++i)
+	{
+		ccc[i][7]=100;ccc[i][10]=64;ccc[i][11]=127;
+		ccc[i][11]=127;ccc[i][71]=64;ccc[i][72]=64;
+		ccc[i][73]=64;ccc[i][74]=64;ccc[i][75]=64;
+		ccc[i][76]=64;ccc[i][77]=64;ccc[i][78]=64;
+		ccc[0][131]=dpt;ccc[0][132]=0x04021808;
+		ccc[0][133]=0;ccc[0][134]=2;
+	}if(midiFile->getStandard()!=4)ccc[9][0]=128;
+	for(int i=0;i<16;++i)for(int j=0;j<135;++j)
+		ccstamps[0][i][j]=ccc[i][j];
+	for(uint32_t eptr=0,ct=midiFile->getEvent(0)->time;eptr<midiFile->getEventCount();)
+	{
+		while(eptr<midiFile->getEventCount()&&ct==midiFile->getEvent(eptr)->time)
+			processEventStub(midiFile->getEvent(eptr++));
+		if(eptr>=midiFile->getEventCount())break;
+		ctime+=(midiFile->getEvent(eptr)->time-ct)*dpt/1e9;
+		while(ctime>ftime*c/100.)
+		{
+			for(int i=0;i<16;++i)for(int j=0;j<135;++j)
+				ccstamps[c][i][j]=ccc[i][j];
+			stamps[c++]=eptr;
+			if(c>100)break;
+		}
+		ct=midiFile->getEvent(eptr)->time;
+	}
+	while(c<101)
+	{
+		for(int i=0;i<16;++i)for(int j=0;j<135;++j)
+			ccstamps[c][i][j]=ccc[i][j];
+		stamps[c++]=midiFile->getEventCount();
+	}
+}
+CMidiPlayer::CMidiPlayer(bool singleInst)
+{
+	midiFile=NULL;resumed=false;singleInstance=singleInst;
+	settings=NULL;synth=NULL;adriver=NULL;waitvoice=true;
+#ifdef _WIN32
+	QueryPerformanceFrequency((LARGE_INTEGER*)&pf);
+#endif
+}
+CMidiPlayer::~CMidiPlayer()
+{
+	if(singleInstance)fluidDeinitialize();
+}
+void CMidiPlayer::playerPanic(bool reset)
+{
+	if(reset)for(int i=0;i<16;++i)
+	{
+		fluid_synth_pitch_bend(synth,i,8192);
+		fluid_synth_cc(synth,i,7,100);
+		fluid_synth_cc(synth,i,10,64);
+		fluid_synth_cc(synth,i,11,127);
+	}
+	for(int i=0;i<16;++i)fluid_synth_all_notes_off(synth,i);
+}
+bool CMidiPlayer::playerLoadFile(const char* fn)
+{
+	midiFile=new CMidiFile(fn);
+	if(!midiFile->isValid())return false;
+	divs=midiFile->getDivision();
+	fileTimer1Pass();
+	fileTimer2Pass();
+	return true;
+}
+void CMidiPlayer::playerInit()
+{
+	ctempo=0x7A120;ctsn=4;ctsd=4;cks=0;dpt=ctempo*1000/divs;
+	tceptr=0;tcstop=0;tcpaused=0;finished=0;mute=solo=0;
+	sendSysEx=true;rpnid=rpnval=-1;
+	if(!singleInstance)fluidPreInitialize();
+}
+void CMidiPlayer::playerDeinit()
+{
+	tceptr=0;tcstop=1;tcpaused=0;
+	delete midiFile;midiFile=NULL;
+	if(!singleInstance)fluidDeinitialize();
+}
+void CMidiPlayer::playerThread()
+{
+	playEvents();
+}
+
+void CMidiPlayer::rendererLoadFile(const char* ofn)
+{
+	settings=new_fluid_settings();
+	fluid_settings_setstr(settings,"audio.file.name",ofn);
+}
+void CMidiPlayer::rendererInit(const char* fn)
+{
+	finished=0;
+	synth=new_fluid_synth(settings);
+	player=new_fluid_player(synth);
+	fluid_player_add(player,fn);
+}
+void CMidiPlayer::rendererThread()
+{
+	fluid_file_renderer_t* renderer=new_fluid_file_renderer(synth);
+	fluid_player_play(player);
+	while(fluid_player_get_status(player)==FLUID_PLAYER_PLAYING)
+		if(fluid_file_renderer_process_block(renderer)!=FLUID_OK)break;
+	delete_fluid_file_renderer(renderer);
+	finished=1;
+}
+void CMidiPlayer::rendererDeinit()
+{
+	delete_fluid_player(player);
+	delete_fluid_synth(synth);
+	delete_fluid_settings(settings);
+	player=NULL;synth=NULL;settings=NULL;
+}
+
+void CMidiPlayer::sendSysX(bool send){sendSysEx=send;}
+uint32_t CMidiPlayer::getStamp(int id){return stamps[id];}
+uint32_t CMidiPlayer::getTCeptr(){return tceptr;}
+void CMidiPlayer::setTCeptr(uint32_t ep,uint32_t st)
+{
+	resumed=true;
+	if(ep==midiFile->getEventCount())tcstop=1;else tceptr=ep;
+	for(int i=0;i<16;++i)
+	{
+		for(int j=0;j<120;++j)fluid_synth_cc(synth,i,j,ccstamps[st][i][j]);
+		fluid_synth_program_change(synth,i,ccstamps[st][i][128]);
+		//fluid_synth_pitch_bend(synth,i,ccstamps[st][i][130]);
+		dpt=ccstamps[st][0][131];ctempo=dpt*divs/1000;
+		ctsn=ccstamps[st][0][132]>>24;ctsd=1<<((ccstamps[st][0][132]>>16)&0xFF);
+		cks=ccstamps[st][0][133];
+	}
+}
+double CMidiPlayer::getFtime(){return ftime;}
+void CMidiPlayer::getCurrentTimeSignature(int *n,int *d){*n=ctsn;*d=ctsd;}
+void CMidiPlayer::getCurrentKeySignature(int *ks){*ks=cks;}
+uint32_t CMidiPlayer::getFileNoteCount(){return midiFile?midiFile->getNoteCount():0;}
+uint32_t CMidiPlayer::getFileStandard(){return midiFile?midiFile->getStandard():0;}
+const char* CMidiPlayer::getTitle(){return midiFile?midiFile->getTitle():"";}
+const char* CMidiPlayer::getCopyright(){return midiFile?midiFile->getCopyright():"";}
+double CMidiPlayer::getTempo(){return 60./(ctempo/1e6)/**ctsd/4.*/;}
+uint32_t CMidiPlayer::getTCpaused(){return tcpaused;}
+void CMidiPlayer::setTCpaused(uint32_t ps){tcpaused=ps;}
+uint32_t CMidiPlayer::isFinished(){return finished;}
+void CMidiPlayer::setResumed(){resumed=true;}
+void CMidiPlayer::setWaitVoice(bool wv){waitvoice=wv;}
+void CMidiPlayer::setGain(double gain){if(settings)fluid_settings_setnum(settings,"synth.gain",gain);}
+int CMidiPlayer::getPolyphone(){return synth?fluid_synth_get_active_voice_count(synth):0;}
+int CMidiPlayer::getMaxPolyphone(){return synth?fluid_synth_get_polyphony(synth):0;}
+void CMidiPlayer::setMaxPolyphone(int p){if(synth)fluid_synth_set_polyphony(synth,p);}
+
+void CMidiPlayer::getChannelPreset(int ch,int *b,int *p,char *name)
+{
+	if(!synth)return(void)(b=0,p=0,strcpy(name,""));
+	fluid_synth_channel_info_t info;
+	fluid_synth_get_channel_info(synth,ch,&info);
+	*b=info.bank;*p=info.program;
+	strcpy(name,info.name);
+}
+void CMidiPlayer::setChannelPreset(int ch,int b,int p)
+{
+	if(!synth)return;
+	fluid_synth_bank_select(synth,ch,b);
+	fluid_synth_program_change(synth,ch,p);
+}
+//16MSB..LSB1
+void CMidiPlayer::setBit(uint16_t &n, uint16_t bn, uint16_t b)
+{n^=(-b^n)&(1<<bn);}
+void CMidiPlayer::setMute(int ch,bool m)
+{setBit(mute,ch,m?1:0);}
+void CMidiPlayer::setSolo(int ch,bool s)
+{setBit(solo,ch,s?1:0);}
+int CMidiPlayer::getCC(int ch, int id)
+{int ret=0;synth?fluid_synth_get_cc(synth,ch,id,&ret):0;return ret;}
+void CMidiPlayer::setCC(int ch, int id, int val)
+{synth?fluid_synth_cc(synth,ch,id,val):0;}
+void CMidiPlayer::getReverbPara(double *r,double *d,double *w,double *l)
+{
+	if(!synth)return;
+	*r=fluid_synth_get_reverb_roomsize(synth);
+	*d=fluid_synth_get_reverb_damp(synth);
+	*w=fluid_synth_get_reverb_width(synth);
+	*l=fluid_synth_get_reverb_level(synth);
+}
+void CMidiPlayer::setReverbPara(int e,double r,double d,double w,double l)
+{
+	if(!synth)return;
+	fluid_synth_set_reverb_on(synth,e);
+	fluid_synth_set_reverb(synth,r,d,w,l);
+}
+void CMidiPlayer::getChorusPara(int *fb,double *l,double *r,double *d,int *type)
+{
+	if(!synth)return;
+	*fb=fluid_synth_get_chorus_nr(synth);
+	*l=fluid_synth_get_chorus_level(synth);
+	*r=fluid_synth_get_chorus_speed_Hz(synth);
+	*d=fluid_synth_get_chorus_depth_ms(synth);
+	*type=fluid_synth_get_chorus_type(synth);
+}
+void CMidiPlayer::setChorusPara(int e,int fb,double l,double r,double d,int type)
+{
+	if(!synth)return;
+	fluid_synth_set_chorus_on(synth,e);
+	fluid_synth_set_chorus(synth,fb,l,r,d,type);
+}
+fluid_settings_t* CMidiPlayer::getFluidSettings(){return settings;}
+void CMidiPlayer::pushSoundFont(const char *sf)
+{fluid_synth_sfload(synth,sf,1);}
+int CMidiPlayer::getSFCount()
+{return synth?fluid_synth_sfcount(synth):0;}
+fluid_sfont_t* CMidiPlayer::getSFPtr(int sfid)
+{return synth&&sfid<getSFCount()?fluid_synth_get_sfont(synth,sfid):NULL;}
diff --git a/core/qmpmidiplay.hpp b/core/qmpmidiplay.hpp
new file mode 100644
index 0000000..fafd677
--- /dev/null
+++ b/core/qmpmidiplay.hpp
@@ -0,0 +1,137 @@
+//sorry for the stupid C-like code...
+#ifndef QMPMIDIPLAY_H
+#define QMPMIDIPLAY_H
+#include <cstring>
+#include <cstdint>
+#include <cstdlib>
+#include <fluidsynth.h>
+struct SEvent
+{
+	uint32_t iid,time,p1,p2;
+	uint8_t type;
+	char *str;
+	SEvent(){time=p1=p2=0;type=0;str=NULL;}
+	SEvent(uint32_t _iid,uint32_t _t,char _tp,uint32_t _p1,uint32_t _p2,const char* s=NULL)
+	{
+		iid=_iid;time=_t;type=_tp;
+		p1=_p1;p2=_p2;
+		if(s){str=new char[strlen(s)+2];strcpy(str,s);}else str=NULL;
+	}
+};
+class CMidiFile
+{
+	private:
+		SEvent *eventList[10000000];
+		char *title,*copyright;
+		uint32_t eventc,std;//standard 0=? 1=GM 2=GM2 3=GS 4=XG
+		uint32_t fmt,trk,divs;
+		FILE *f;
+		int byteread,valid;
+		uint32_t notes,curt,curid;
+
+		void error(int fatal,const char* format,...);
+		uint32_t readSW();
+		uint32_t readDW();
+		uint32_t readVL();
+		int eventReader();
+		void trackChunkReader();
+		void headerChunkReader();
+		int chunkReader(int hdrXp);
+	public:
+		CMidiFile(const char* fn);
+		~CMidiFile();
+		const SEvent* getEvent(uint32_t id);
+		uint32_t getEventCount();
+		uint32_t getDivision();
+		uint32_t getNoteCount();
+		uint32_t getStandard();
+		const char* getTitle();
+		const char* getCopyright();
+		bool isValid();
+};
+class CMidiPlayer
+{
+	private:
+		CMidiFile *midiFile;
+		uint32_t stamps[101];
+		uint32_t ccstamps[101][16][135],ccc[16][135];
+		//0..127:cc 128:pc 129:cp 130:pb 131:tempo 132:ts 133:ks 134:pbr
+		int32_t rpnid,rpnval;
+		uint16_t mute,solo;
+		double ftime;
+		bool sendSysEx,singleInstance,waitvoice;
+		fluid_settings_t* settings;
+		fluid_synth_t* synth;
+		fluid_audio_driver_t* adriver;
+		fluid_player_t* player;
+		uint32_t ctempo,ctsn,ctsd,dpt,divs,cks;
+		//raw tempo, timesig num., timesig den., delay per tick, division, keysig
+		//thread control
+		uint32_t tceptr,tcpaused,tcstop;
+		uint32_t finished,resumed;
+
+		void setBit(uint16_t &n,uint16_t bn,uint16_t b);
+		void processEvent(const SEvent *e);
+		void processEventStub(const SEvent *e);
+		void playEvents();
+		void fileTimer1Pass();
+		void fileTimer2Pass();
+	public:
+		CMidiPlayer(bool singleInst=false);
+		~CMidiPlayer();
+		bool playerLoadFile(const char* fn);
+		void playerInit();
+		void fluidPreInitialize();
+		void fluidInitialize();
+		void fluidDeinitialize();
+		void playerDeinit();
+		void playerThread();
+		void playerPanic(bool reset=false);
+
+		void rendererLoadFile(const char* ofn);
+		void rendererInit(const char *fn);
+		void rendererThread();
+		void rendererDeinit();
+
+		//playing control methods
+		uint32_t getStamp(int id);
+		uint32_t getTCeptr();
+		void setTCeptr(uint32_t ep,uint32_t st);
+		uint32_t getTCpaused();
+		void setTCpaused(uint32_t ps);
+		uint32_t isFinished();
+		void setResumed();
+		void setWaitVoice(bool wv);
+
+		double getFtime();
+		void getCurrentTimeSignature(int *n,int *d);
+		void getCurrentKeySignature(int *ks);
+		uint32_t getFileNoteCount();
+		uint32_t getFileStandard();
+		double getTempo();
+		const char* getTitle();
+		const char* getCopyright();
+
+		void setGain(double gain);
+		void sendSysX(bool send);
+		int getPolyphone();
+		int getMaxPolyphone();
+		void setMaxPolyphone(int p);
+
+		void setChannelPreset(int ch,int b,int p);
+		void getChannelPreset(int ch,int *b,int *p,char *name);
+		void setMute(int ch,bool m);
+		void setSolo(int ch,bool s);
+		int getCC(int ch,int id);
+		void setCC(int ch,int id,int val);
+		void getReverbPara(double *r,double *d,double *w,double *l);
+		void setReverbPara(int e,double r,double d,double w,double l);
+		void getChorusPara(int *fb,double *l,double *r,double *d,int *type);
+		void setChorusPara(int e,int fb,double l,double r,double d,int type);
+
+		fluid_settings_t* getFluidSettings();
+		void pushSoundFont(const char* sf);
+		int getSFCount();
+		fluid_sfont_t* getSFPtr(int sfid);
+};
+#endif
diff --git a/core/qmpmidiread.cpp b/core/qmpmidiread.cpp
new file mode 100644
index 0000000..fd2e0d9
--- /dev/null
+++ b/core/qmpmidiread.cpp
@@ -0,0 +1,239 @@
+//CLI Midi file player based on libfluidsynth
+//Midi file reading module
+//Written by Chris Xiong, 2015
+#include <cstdio>
+#include <cstring>
+#include <cstdlib>
+#include <cstdint>
+#include <cstdarg>
+#include <algorithm>
+#include "qmpmidiplay.hpp"
+const char* GM1SysX={"\xF0\x7E\x7F\x09\x01\xF7"};
+const char* GM2SysX={"\xF0\x7E\x7F\x09\x03\xF7"};
+const char* GSSysEx={"\xF0\x41\x10\x42\x12\x40\x00\x7F\x00\x41\xF7"};
+const char* XGSysEx={"\xF0\x43\x10\x4C\x00\x00\x7E\x00\xF7"};
+bool cmp(SEvent *a,SEvent *b){return a->time-b->time?a->time<b->time:a->iid<b->iid;}
+void CMidiFile::error(int fatal,const char* format,...)
+{
+	va_list ap;
+	va_start(ap,format);vfprintf(stderr,format,ap);va_end(ap);
+	fprintf(stderr," at %#lx\n",ftell(f));
+	if(fatal)throw 2;
+}
+uint32_t CMidiFile::readSW()
+{
+	byteread+=2;
+	uint32_t ret=0;
+	for(int i=0;i<2;++i){ret<<=8;ret|=((uint32_t)fgetc(f))&0xFF;}
+	return ret;
+}
+uint32_t CMidiFile::readDW()
+{
+	byteread+=4;
+	uint32_t ret=0;
+	for(int i=0;i<4;++i){ret<<=8;ret|=((uint32_t)fgetc(f))&0xFF;}
+	return ret;
+}
+uint32_t CMidiFile::readVL()
+{
+	uint32_t ret=0,t,c=0;
+	do
+	{
+		t=fgetc(f);
+		if(++c>4)error(1,"E: Variable length type overflow.");
+		ret<<=7;ret|=(t&0x7F);
+	}while(t&0x80);
+	byteread+=c;
+	return ret;
+}
+int CMidiFile::eventReader()//returns 0 if End of Track encountered
+{
+	uint32_t delta=readVL();curt+=delta;
+	char type=fgetc(f);++byteread;uint32_t p1,p2;
+	static char lasttype;
+retry:
+	switch(type&0xF0)
+	{
+		case 0x80://Note Off
+			p1=fgetc(f);p2=fgetc(f);byteread+=2;
+			eventList[eventc++]=new SEvent(curid,curt,type,p1,p2);
+		break;
+		case 0x90://Note On
+			p1=fgetc(f);p2=fgetc(f);byteread+=2;
+			if(p2)
+			{
+				++notes;
+				eventList[eventc++]=new SEvent(curid,curt,type,p1,p2);
+			}
+			else
+				eventList[eventc++]=new SEvent(curid,curt,(type&0x0F)|0x80,p1,p2);
+		break;
+		case 0xA0://Note Aftertouch
+			p1=fgetc(f);p2=fgetc(f);byteread+=2;
+			eventList[eventc++]=new SEvent(curid,curt,type,p1,p2);
+		break;
+		case 0xB0://Controller Change
+			p1=fgetc(f);p2=fgetc(f);byteread+=2;
+			eventList[eventc++]=new SEvent(curid,curt,type,p1,p2);
+		break;
+		case 0xC0://Patch Change
+			p1=fgetc(f);++byteread;
+			eventList[eventc++]=new SEvent(curid,curt,type,p1,0);
+		break;
+		case 0xD0://Channel Aftertouch
+			p1=fgetc(f);++byteread;
+			eventList[eventc++]=new SEvent(curid,curt,type,p1,0);
+		break;
+		case 0xE0://Pitch wheel
+			p1=fgetc(f);p2=fgetc(f);byteread+=2;
+			eventList[eventc++]=new SEvent(curid,curt,type,(p1|(p2<<7))&0x3FFF,0);
+		break;
+		case 0xF0:
+			if((type&0x0F)==0x0F)//Meta Event
+			{
+				char metatype=fgetc(f);++byteread;
+				switch(metatype)
+				{
+					case 0x00://Sequence Number
+						fgetc(f);fgetc(f);fgetc(f);
+						byteread+=3;
+					break;
+					case 0x20://Channel Prefix
+						fgetc(f);fgetc(f);byteread+=2;
+					break;
+					case 0x2F://End of Track
+						fgetc(f);++byteread;
+						return 0;
+					break;
+					case 0x51://Set Tempo
+						p1=readDW();p1&=0x00FFFFFF;
+						eventList[eventc++]=new SEvent(curid,curt,type,metatype,p1);
+					break;
+					case 0x54://SMTPE offset, not handled.
+						fgetc(f);fgetc(f);fgetc(f);
+						fgetc(f);fgetc(f);fgetc(f);
+						byteread+=6;
+					break;
+					case 0x58://Time signature
+						fgetc(f);++byteread;
+						p1=readDW();
+						eventList[eventc++]=new SEvent(curid,curt,type,metatype,p1);
+					break;
+					case 0x59://Key signature
+						fgetc(f);++byteread;
+						p1=readSW();
+						eventList[eventc++]=new SEvent(curid,curt,type,metatype,p1);
+					break;
+					case 0x01:case 0x02:case 0x03:
+					case 0x04:case 0x05:case 0x06:
+					case 0x07:case 0x7F:default://text-like meta
+					{
+						uint32_t len=readVL(),c;char* str=NULL;
+						if(len<=1024&&len>0)str=new char[len+8];
+						for(c=0;c<len;++c)
+						{
+							++byteread;if(str)str[c]=fgetc(f);else fgetc(f);
+						}
+						if(str)str[c]='\0';eventList[eventc++]=new SEvent(curid,curt,type,metatype,0,str);
+						if(str&&metatype==0x03&&!title)
+						{
+							title=new char[len+8];
+							strcpy(title,str);
+						}
+						if(str&&metatype==0x02&&!copyright)
+						{
+							copyright=new char[len+8];
+							strcpy(copyright,str);
+						}
+						if(len<=1024&&len>0)delete[] str;
+					}
+				}
+			}
+			else if((type&0x0F)==0x00||(type&0x0F)==0x07)//SysEx
+			{
+				uint32_t len=readVL(),c;char* str=NULL;
+				str=new char[len+8];
+				if((type&0x0F)==0x00)
+				{
+					str[0]=0xF0;++len;
+					for(c=1;c<len;++c){++byteread;str[c]=fgetc(f);}
+				}
+				else for(c=0;c<len;++c){++byteread;str[c]=fgetc(f);}
+				eventList[eventc++]=new SEvent(curid,curt,type,len,0,str);
+				if(!strcmp(str,GM1SysX))std=1;
+				if(!strcmp(str,GM2SysX))std=2;
+				if(!strcmp(str,GSSysEx))std=3;
+				if(!strcmp(str,XGSysEx))std=4;
+			}
+			else error(0,"W: Unknown event type %#x",type);
+		break;
+		default:
+			fseek(f,-1,SEEK_CUR);--byteread;type=lasttype;goto retry;
+	}
+	lasttype=type;++curid;
+	return 1;
+}
+void CMidiFile::trackChunkReader()
+{
+	int chnklen=readDW();byteread=0;curt=0;curid=0;
+	while(/*byteread<chnklen&&*/eventReader());
+	if(byteread<chnklen)
+	{
+		error(0,"W: Extra bytes after EOT event.");
+		while(byteread<chnklen){fgetc(f);++byteread;}
+	}
+	/*if(byteread>chnklen)
+	{
+		error(1,"E: Read past end of track.");
+	}*/
+}
+void CMidiFile::headerChunkReader()
+{
+	int chnklen=readDW();byteread=0;
+	if(chnklen<6)error(1,"E: Header chunk too short.");
+	if(chnklen>6)error(0,"W: Header chunk length longer than expected. Ignoring extra bytes.");
+	fmt=readSW();trk=readSW();divs=readSW();
+	if(divs&0x8000)error(1,"E: SMTPE format is not supported.");
+	for(;byteread<chnklen;++byteread){fgetc(f);}
+}
+int CMidiFile::chunkReader(int hdrXp)
+{
+	char hdr[6];
+	if(!fgets(hdr,5,f))error(1,"E: Unexpected EOF.");
+	if(hdrXp)
+		if(strncmp(hdr,"MThd",4)){error(1,"E: Wrong MIDI header.");throw;}
+		else return headerChunkReader(),0;
+	else
+		if(strncmp(hdr,"MTrk",4))
+		{
+			error(0,"W: Wrong track chunk header. Ignoring the whole chunk.");
+			for(int chnklen=readDW();chnklen>0;--chnklen)fgetc(f);return 0;
+		}
+		else return trackChunkReader(),1;
+}
+CMidiFile::CMidiFile(const char* fn)
+{
+	title=copyright=NULL;notes=eventc=0;std=0;valid=1;
+	try
+	{
+		if(!(f=fopen(fn,"rb")))throw (fprintf(stderr,"E: file %s doesn't exist!\n",fn),2);
+		chunkReader(1);
+		for(uint32_t i=0;i<trk;i+=chunkReader(0));
+		fclose(f);
+		std::sort(eventList,eventList+eventc,cmp);
+	}
+	catch(int){fprintf(stderr,"E: %s is not a supported file.\n",fn);valid=0;}
+}
+CMidiFile::~CMidiFile()
+{
+	for(uint32_t i=0;i<eventc;++i)delete eventList[i];
+	if(title)delete[] title;if(copyright)delete[] copyright;
+}
+const SEvent* CMidiFile::getEvent(uint32_t id){return id<eventc?eventList[id]:NULL;}
+uint32_t CMidiFile::getEventCount(){return eventc;}
+uint32_t CMidiFile::getDivision(){return divs;}
+uint32_t CMidiFile::getNoteCount(){return notes;}
+uint32_t CMidiFile::getStandard(){return std;}
+bool CMidiFile::isValid(){return valid;}
+const char* CMidiFile::getTitle(){return title;}
+const char* CMidiFile::getCopyright(){return copyright;}
-- 
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