Further midi file support.

src/audio/CMakeLists.txt

@@ -6,12 +6,14 @@ list(APPEND audio_LIB_INCLUDES
     midi/MidiTrack.cpp
     midi/MidiDocument.cpp
     midi/MidiEvent.cpp
-    midi/MetaMidiEvent.cpp)
+    midi/MetaMidiEvent.cpp
+    midi/MidiChannelEvent.cpp)
 
 
 add_library(audio SHARED ${audio_LIB_INCLUDES})
 target_include_directories(audio PUBLIC
                           "${CMAKE_CURRENT_SOURCE_DIR}"
+                          "${PROJECT_SOURCE_DIR}/src/core/file_utilities"
                           "${PROJECT_SOURCE_DIR}/src/core/loggers"
                           "${CMAKE_CURRENT_SOURCE_DIR}/audio_interfaces"
                           "${CMAKE_CURRENT_SOURCE_DIR}/midi"

src/audio/midi/MetaMidiEvent.cpp

@@ -1,7 +1,55 @@
 #include "MetaMidiEvent.h"
 
 MetaMidiEvent::MetaMidiEvent()
-	: MidiEvent()
+    : MidiEvent(),
+      mType(Type::UNSET),
+      mLabel(),
+      mValue(0)
 {
 
 }
+
+std::shared_ptr<MetaMidiEvent> MetaMidiEvent::Create()
+{
+    return std::make_shared<MetaMidiEvent>();
+}
+
+void MetaMidiEvent::SetValue(int value)
+{
+    mValue = value;
+}
+
+bool MetaMidiEvent::IsTrackName(char c)
+{
+    return (c & META_TRACK_NAME) == META_TRACK_NAME;
+}
+
+bool MetaMidiEvent::IsSetTempo(char c)
+{
+    return (c & META_SET_TEMPO) == META_SET_TEMPO;
+}
+
+bool MetaMidiEvent::IsTimeSignature(char c)
+{
+    return (c & META_TIME_SIG) == META_TIME_SIG;
+}
+
+void MetaMidiEvent::SetIsSetTempo()
+{
+    mType = Type::SET_TEMPO;
+}
+
+void MetaMidiEvent::SetIsTrackName()
+{
+    mType = Type::TRACK_NAME;
+}
+
+void MetaMidiEvent::SetIsTimeSignature()
+{
+    mType = Type::TIME_SIGNATURE;
+}
+
+void MetaMidiEvent::SetLabel(const std::string& label)
+{
+    mLabel = label;
+}

src/audio/midi/MetaMidiEvent.h

@@ -1,26 +1,49 @@
 #pragma once
 
-#include <string>
-
 #include "MidiEvent.h"
+#include <memory>
+#include <string>
 
 class MetaMidiEvent : public MidiEvent
 {
 public:
-	enum class Type
-	{
-		UNSET,
-		TRACK_NAME
-	};
+    enum class Type
+    {
+        UNSET,
+        TRACK_NAME,
+        SET_TEMPO,
+        TIME_SIGNATURE
+    };
 
-	Type mType = Type::UNSET;
-	std::string mLabel;
-	MetaMidiEvent();
+private:
 
-	static bool IsTrackName(char c)
-	{
-		return (c & META_TRACK_NAME) == META_TRACK_NAME;
-	}
+    static const int META_SET_TEMPO = 0x51; // 0101 0001
+    static const int META_TRACK_NAME = 0x3; // 0000 0011
+    static const int META_TIME_SIG = 0x58; // 0101 1000
+    Type mType;
+    std::string mLabel;
+    int mValue;
 
-	static const int META_TRACK_NAME = 0x3; // 0000 0011
+public:
+
+    MetaMidiEvent();
+    static std::shared_ptr<MetaMidiEvent> Create();
+
+    void SetValue(int value);
+
+    void SetIsTrackName();
+
+    void SetIsSetTempo();
+
+    void SetIsTimeSignature();
+
+    void SetLabel(const std::string& label);
+
+    static bool IsTrackName(char c);
+
+    static bool IsSetTempo(char c);
+
+    static bool IsTimeSignature(char c);
 };
+
+using MetaMidiEventPtr = std::shared_ptr<MetaMidiEvent>;

src/audio/midi/MidiChannelEvent.cpp

@@ -0,0 +1,80 @@
+#include "MidiChannelEvent.h"
+
+MidiChannelEvent::MidiChannelEvent()
+    : MidiEvent(),
+      mType(Type::NONE),
+      mValue0(0),
+      mValue1(0)
+{
+
+}
+
+std::shared_ptr<MidiChannelEvent> MidiChannelEvent::Create()
+{
+    return std::make_shared<MidiChannelEvent>();
+}
+
+void MidiChannelEvent::SetType(Type type)
+{
+    mType = type;
+}
+MidiChannelEvent::Type MidiChannelEvent::GetType()
+{
+    return mType;
+}
+void MidiChannelEvent::SetValues(int value0, int value1)
+{
+    mValue0 = value0;
+    mValue1 = value1;
+}
+int MidiChannelEvent::GetValue0()
+{
+    return mValue0;
+}
+int MidiChannelEvent::GetValue1()
+{
+    return mValue1;
+}
+
+bool MidiChannelEvent::IsControllerEvent(int c)
+{
+    return (c & CONTROLLER) == CONTROLLER;
+}
+
+bool MidiChannelEvent::IsNoteOnEvent(int c)
+{
+    return (c & NOTE_ON) == NOTE_ON;
+}
+
+bool MidiChannelEvent::IsNoteOffEvent(int c)
+{
+    return (c & NOTE_OFF) == NOTE_OFF;
+}
+
+bool MidiChannelEvent::IsNoteAfterTouchEvent(int c)
+{
+    return (c & NOTE_AFTERTOUCH) == NOTE_AFTERTOUCH;
+}
+
+bool MidiChannelEvent::IsProgramEvent(int c)
+{
+    return (c & PROGRAM) == PROGRAM;
+}
+
+bool MidiChannelEvent::IsChannelAftertouchEvent(int c)
+{
+    return (c & CHANNEL_AFTERTOUCH) == CHANNEL_AFTERTOUCH;
+}
+
+bool MidiChannelEvent::IsPitchbendEvent(int c)
+{
+    return (c & PITCH_BEND) == PITCH_BEND;
+}
+
+bool MidiChannelEvent::IsStatusByte(int c)
+{
+    return IsControllerEvent(c) || IsNoteOnEvent(c) ||
+            IsNoteOffEvent(c) || IsNoteAfterTouchEvent(c) ||
+            IsProgramEvent(c) || IsChannelAftertouchEvent(c) ||
+            IsPitchbendEvent(c);
+}

src/audio/midi/MidiChannelEvent.h

@@ -0,0 +1,52 @@
+#pragma once
+
+#include "MidiEvent.h"
+
+class MidiChannelEvent : public MidiEvent
+{
+public:
+    enum class Type{
+        NONE, NOTE_OFF, NOTE_ON, NOTE_AFTERTOUCH, CONTROLLER,
+        PROGRAM, CHANNEL_AFTERTOUCH, PITCH_BEND
+    };
+
+private:
+    static const int NOTE_OFF = 0x8;
+    static const int NOTE_ON = 0x9;
+    static const int NOTE_AFTERTOUCH = 0xA;
+    static const int CONTROLLER = 0xB;
+    static const int PROGRAM = 0xC;
+    static const int CHANNEL_AFTERTOUCH = 0xD;
+    static const int PITCH_BEND = 0xE;
+    Type mType;
+    int mValue0;
+    int mValue1;
+
+public:
+    MidiChannelEvent();
+    static std::shared_ptr<MidiChannelEvent> Create();
+
+    void SetType(Type type);
+    Type GetType();
+    void SetValues(int value0, int value1);
+    int GetValue0();
+    int GetValue1();
+
+    static bool IsControllerEvent(int c);
+
+    static bool IsNoteOnEvent(int c);
+
+    static bool IsNoteOffEvent(int c);
+
+    static bool IsNoteAfterTouchEvent(int c);
+
+    static bool IsProgramEvent(int c);
+
+    static bool IsChannelAftertouchEvent(int c);
+
+    static bool IsPitchbendEvent(int c);
+
+    static bool IsStatusByte(int c);
+};
+
+using MidiChannelEventPtr = std::shared_ptr<MidiChannelEvent>;

src/audio/midi/MidiEvent.cpp

@@ -1,6 +1,37 @@
 #include "MidiEvent.h"
 
 MidiEvent::MidiEvent()
+    : mTimeDelta(0)
 {
 
 }
+
+void MidiEvent::SetTimeDelta(int delta)
+{
+    mTimeDelta = delta;
+}
+
+std::shared_ptr<MidiEvent> MidiEvent::Create()
+{
+    return std::make_shared<MidiEvent>();
+}
+
+bool MidiEvent::IsMetaEvent(char c)
+{
+    return (c & META_EVENT) == META_EVENT;
+}
+
+bool MidiEvent::IsSysExEvent(char c)
+{
+    return IsNormalSysExEvent(c) || IsDividedSysExEvent(c);
+}
+
+bool MidiEvent::IsNormalSysExEvent(char c)
+{
+    return (c & SYSEX_EVENT) == SYSEX_EVENT;
+}
+
+bool MidiEvent::IsDividedSysExEvent(char c)
+{
+    return (c & DIVIDED_SYSEX_EVENT) == DIVIDED_SYSEX_EVENT;
+}

src/audio/midi/MidiEvent.h

@@ -1,17 +1,26 @@
 #pragma once
 
+#include <memory>
+
 class MidiEvent
 {
+    static const int META_EVENT = 0xFF;  // 1111 1111
+    static const int SYSEX_EVENT = 0xF0;
+    static const int DIVIDED_SYSEX_EVENT = 0xF7;
+    int mTimeDelta;
 
 public:
-	int mTimeDelta = 0;
-	MidiEvent();
 
-	static bool IsMetaEvent(char c)
-	{
-		return (c & META_EVENT) == META_EVENT;
-	}
+    MidiEvent();
+    virtual ~MidiEvent() = default;
 
-public:
-	static const int META_EVENT = 0xFF;  // 1111 1111
+    static std::shared_ptr<MidiEvent> Create();
+
+    void SetTimeDelta(int delta);
+    static bool IsMetaEvent(char c);
+    static bool IsSysExEvent(char c);
+    static bool IsNormalSysExEvent(char c);
+    static bool IsDividedSysExEvent(char c);
 };
+
+using MidiEventPtr = std::shared_ptr<MidiEvent>;

src/audio/midi/MidiReader.cpp

@@ -1,211 +1,379 @@
 #include "MidiReader.h"
+
+#include "MidiDocument.h"
+#include "ByteUtils.h"
+#include "MidiTrack.h"
+#include "BinaryFile.h"
+
 #include <fstream>
 #include <iostream>
 #include <cstring>
 #include <bitset>
-#include "MidiDocument.h"
-#include "ByteUtils.h"
-#include "MidiTrack.h"
 
 MidiReader::MidiReader()
+    :mDocument(),
+     mTrackByteCount(0),
+     mLastChannelEventType(MidiChannelEvent::Type::NONE)
 {
 
 }
 
-bool GetBytes(std::ifstream& file, char* buffer, unsigned number)
-{
-	char c;
-	for(unsigned idx=0; idx<number; idx++)
-	{
-		if(file.get(c))
-		{
-			buffer[idx] = c;
-		}
-		else
-		{
-			return false;
-		}
-	}
-	return true;
-}
-
-bool GetWord(std::ifstream& file, char* buffer)
-{
-	return GetBytes(file, buffer, 2);
-}
-
-bool GetDWord(std::ifstream& file, char* buffer)
-{
-	return GetBytes(file, buffer, 4);
-}
-
 bool MidiReader::ProcessHeader(std::ifstream& file)
 {
-	char c;
-	unsigned bufferSize = ByteUtils::BYTES_PER_DWORD;
-	char buffer[bufferSize];
-
-	if(!GetDWord(file, buffer))
-	{
-		return false;
-	}
-
-	if(!ByteUtils::CompareDWords(buffer, HeaderLabel))
-	{
-		return false;
-	}
-
-	if(!GetDWord(file, buffer))
-	{
-		return false;
-	}
-
-	int length = ByteUtils::ToDWord(buffer);
-
-    if(!GetWord(file, buffer))
-	{
-    	return false;
-	}
-	mDocument.mFormatType = ByteUtils::ToWord(buffer);
-
-    if(!GetWord(file, buffer))
+    if(!BinaryFile::CheckNextDWord(file, HeaderLabel))
     {
-    	return false;
+        return false;
     }
-	mDocument.mExpectedTracks = ByteUtils::ToWord(buffer);
 
-    if(!GetWord(file, buffer))
+    int length = 0;
+    if(!BinaryFile::GetNextDWord(file, length))
     {
-    	return false;
+        return false;
     }
-	int time_division;
-    std::memcpy(&time_division, buffer, sizeof(int));
 
-	const int TOP_7_BITS = 0x7F00; // 0111 1111 - 0000 0000
-	mDocument.mUseFps = ByteUtils::GetWordFirstBit(time_division);
-	mDocument.mFps = ((~time_division & TOP_7_BITS) >> 8) - 1; // Reverse 2complement of next 7 bits
-	mDocument.ticksPerFrame = ByteUtils::GetWordLastByte(time_division);
-	return true;
+    if(!BinaryFile::GetNextWord(file, mDocument.mFormatType))
+    {
+        return false;
+    }
+
+    if(!BinaryFile::GetNextWord(file, mDocument.mExpectedTracks))
+    {
+        return false;
+    }
+
+    ProcessTimeDivision(file);
+    return true;
+}
+
+bool MidiReader::ProcessTimeDivision(std::ifstream& file)
+{
+    int time_division;
+    if(!BinaryFile::GetNextWord(file, time_division, false))
+    {
+        return false;
+    }
+
+    const int TOP_7_BITS = 0x7F00; // 0111 1111 - 0000 0000
+    mDocument.mUseFps = ByteUtils::GetWordFirstBit(time_division);
+    mDocument.mFps = ((~time_division & TOP_7_BITS) >> 8) - 1; // Reverse 2complement of next 7 bits
+    mDocument.ticksPerFrame = ByteUtils::GetWordLastByte(time_division);
+    return true;
 }
 
 int MidiReader::ProcessTimeDelta(std::ifstream& file)
 {
-	char c;
-	file.get(c);
-	bool needs_next = c & ByteUtils::BYTE_FIRST_BIT;
-	int time_offset = 0;
-	if(!needs_next)
-	{
-		time_offset = int(c);
-		mTrackByteCount ++;
-	}
-	std::cout << "Next " << needs_next <<std::endl;
-	std::cout << "Offset " << time_offset <<std::endl;
-	return time_offset;
+    char c;
+    file.get(c);
+    mTrackByteCount ++;
+
+    if(unsigned(c >> 7) == 0)
+    {
+        int delta = int(c);
+        std::cout << "Time delta final: " << delta << "|" << std::bitset<16>(c)<< std::endl;
+        return delta;
+    }
+
+    int working_c = c;
+    int final_c = 0;
+    unsigned count = 0;
+    std::cout << "Working " << std::bitset<8>(working_c) << std::endl;
+    while(unsigned(working_c >> 7) != 0)
+    {
+        char corrected = (working_c &= ~(1UL << 7));
+        final_c <<= 7;
+        final_c |= (corrected << 7*count);
+        char file_c;
+        file.get(file_c);
+        mTrackByteCount ++;
+        working_c = int(file_c);
+        std::cout << "Working " << std::bitset<8>(working_c) << std::endl;
+        count ++;
+    }
+    std::cout << "Time delta start: " << std::bitset<16>(final_c) << std::endl;
+    final_c <<= 7;
+    std::cout << "Time delta pre: " << std::bitset<16>(final_c) << std::endl;
+    final_c |= (working_c << 7*(count-1));
+
+    int delta = int(final_c);
+    std::cout << "Time delta final: " << delta << "|" << std::bitset<16>(final_c)<< std::endl;
+    return delta;
+}
+
+bool MidiReader::ProcessTrackNameMetaEvent(std::ifstream& file, MetaMidiEvent& event)
+{
+    event.SetIsTrackName();
+
+    int length = 0;
+    BinaryFile::GetNextByteAsInt(file, length);
+    mTrackByteCount ++;
+
+    std::string name;
+    BinaryFile::GetNextString(file, name, length);
+    mTrackByteCount += length;
+    std::cout << "Track name: " << name << "|" << length <<std::endl;
+    event.SetLabel(name);
+    return true;
+}
+
+bool MidiReader::ProcessSetTempoMetaEvent(std::ifstream& file, MetaMidiEvent& event)
+{
+    event.SetIsSetTempo();
+
+    int length = 0;
+    BinaryFile::GetNextByteAsInt(file, length);
+    mTrackByteCount ++;
+
+    char buffer[length];
+    BinaryFile::GetNextNBytes(file, buffer, length);
+    mTrackByteCount += length;
+
+    int tempo = ByteUtils::ToInt(buffer, length);
+    const int MICROSECONDS_PER_MINUTE = 60000000;
+    std::cout << "Got tempo "<< tempo << "|" << MICROSECONDS_PER_MINUTE/tempo<< std::endl;
+    event.SetValue(tempo);
+    return true;
+}
+
+
+bool MidiReader::ProcessTimeSignatureMetaEvent(std::ifstream& file, MetaMidiEvent& event)
+{
+    event.SetIsTimeSignature();
+
+    int length = 0;
+    BinaryFile::GetNextByteAsInt(file, length);
+    mTrackByteCount ++;
+
+    int numer = 0;
+    BinaryFile::GetNextByteAsInt(file, numer);
+    mTrackByteCount ++;
+
+    int denom = 0;
+    BinaryFile::GetNextByteAsInt(file, denom);
+    mTrackByteCount ++;
+
+    int metro = 0;
+    BinaryFile::GetNextByteAsInt(file, metro);
+    mTrackByteCount ++;
+
+    int f32s = 0;
+    BinaryFile::GetNextByteAsInt(file, f32s);
+    mTrackByteCount ++;
+
+    std::cout << "Time sig " << length << "|" <<  numer << "|" << denom << "|" << metro << "|" << f32s << std::endl;
+    return true;
 }
 
 bool MidiReader::ProcessMetaEvent(std::ifstream& file, MetaMidiEvent& event)
 {
-	char c;
-	file.get(c);
-	mTrackByteCount ++;
-	if(MetaMidiEvent::IsTrackName(c))
-	{
-		event.mType = MetaMidiEvent::Type::TRACK_NAME;
-		file.get(c);
-		mTrackByteCount ++;
-		int length = int(c);
-		std::string name;
-		std::cout << "Track name: " << length <<std::endl;
-
-		for(unsigned idx=0; idx<length; idx++)
-		{
-			file.get(c);
-			mTrackByteCount ++;
-			name += c;
-		}
-		std::cout << name << std::endl;
-		event.mLabel = "Track name";
-	}
-	else
-	{
-		std::cout << "something else" << std::endl;
-		std::cout << "Next " << std::bitset<8>(c) << "|"  <<std::endl;
-	}
-	return true;
+    char c;
+    file.get(c);
+    mTrackByteCount ++;
+    if(MetaMidiEvent::IsTrackName(c))
+    {
+        ProcessTrackNameMetaEvent(file, event);
+    }
+    else if(MetaMidiEvent::IsSetTempo(c))
+    {
+        ProcessSetTempoMetaEvent(file, event);
+    }
+    else if(MetaMidiEvent::IsTimeSignature(c))
+    {
+        ProcessTimeSignatureMetaEvent(file, event);
+    }
+    else
+    {
+        std::cout << "something else" << std::endl;
+        std::cout << "Next " << std::bitset<8>(c) << "|"  <<std::endl;
+    }
+    return true;
 }
 
-bool MidiReader::ProcessEvent(std::ifstream& file)
+bool MidiReader::ProcessMidiEventData(std::ifstream& file, MidiChannelEvent& event, char c)
 {
-	char c;
-	int timeDelta = ProcessTimeDelta(file);
-
-	file.get(c);
-	mTrackByteCount ++;
-	if(MidiEvent::IsMetaEvent(c))
-	{
-		MetaMidiEvent event;
-		event.mTimeDelta = timeDelta;
-		std::cout << "Meta event " <<std::endl;
-		ProcessMetaEvent(file, event);
-	}
-	else
-	{
-		int first_byte = 0xF0;
-		int event_type = (c & first_byte) >> 4;
-		std::cout << "Next " << std::bitset<8>(c) << "|" << event_type <<std::endl;
-		std::cout << event_type << std::endl;
-	}
-	return true;
+    int value0 = int(c);
+    int value1 = 0;
+    BinaryFile::GetNextByteAsInt(file, value1);
+    mTrackByteCount ++;
+    event.SetValues(value0, value1);
+    std::cout << "sdata: " << value0 << "|" << value1 << "|" << std::endl;
+    return true;
 }
 
-bool MidiReader::ProcessTrackChunk(std::ifstream& file)
+bool MidiReader::ProcessMidiEventData(std::ifstream& file, MidiChannelEvent& event)
 {
-	char c;
-	unsigned bufferSize = ByteUtils::BYTES_PER_DWORD;
-	char buffer[bufferSize];
+    int value0 = 0;
+    BinaryFile::GetNextByteAsInt(file, value0);
+    mTrackByteCount ++;
 
-	if(!GetDWord(file, buffer))
-	{
-		return false;
-	}
+    int value1 = 0;
+    BinaryFile::GetNextByteAsInt(file, value1);
+    mTrackByteCount ++;
+    event.SetValues(value0, value1);
+    std::cout << "data: " << value0 << "|" << value1 << "|" << std::endl;
+    return true;
+}
 
-	if(!ByteUtils::CompareDWords(buffer, TrackChunkLabel))
-	{
-		return false;
-	}
+bool MidiReader::ProcessMidiChannelEvent(std::ifstream& file, char firstByte, MidiChannelEvent& event)
+{
+    int first_four_bits = 0xF0;
+    int second_four_bits = 0xF;
+    int event_type = (firstByte & first_four_bits) >> 4;
+    int midi_channel = (firstByte & second_four_bits) >> 4;
+    std::cout << "Channel: " << midi_channel << std::endl;
 
-	if(!GetDWord(file, buffer))
-	{
-		return false;
-	}
-	int chunkSize = ByteUtils::ToDWord(buffer);
-	std::cout << "Chunk size: "<< chunkSize << std::endl;
+    if(MidiChannelEvent::IsStatusByte(event_type))
+    {
+        if(MidiChannelEvent::IsControllerEvent(event_type))
+        {
+            event.SetType(MidiChannelEvent::Type::CONTROLLER);
+            mLastChannelEventType = MidiChannelEvent::Type::CONTROLLER;
+            std::cout << "Controller Event"<< std::endl;
+            ProcessMidiEventData(file, event);
+        }
+        else if(MidiChannelEvent::IsProgramEvent(event_type))
+        {
+            event.SetType(MidiChannelEvent::Type::PROGRAM);
+            mLastChannelEventType = MidiChannelEvent::Type::PROGRAM;
+            std::cout << "Program Event"<< std::endl;
+            int value0 = 0;
+            BinaryFile::GetNextByteAsInt(file, value0);
+            mTrackByteCount ++;
+            std::cout << "value " << value0 << std::endl;
+        }
+        else if(MidiChannelEvent::IsNoteOnEvent(event_type))
+        {
+            event.SetType(MidiChannelEvent::Type::NOTE_ON);
+            mLastChannelEventType = MidiChannelEvent::Type::NOTE_ON;
+            std::cout << "Note on Event"<< std::endl;
+            ProcessMidiEventData(file, event);
+        }
+        else if(MidiChannelEvent::IsNoteOffEvent(event_type))
+        {
+            event.SetType(MidiChannelEvent::Type::NOTE_OFF);
+            mLastChannelEventType = MidiChannelEvent::Type::NOTE_OFF;
+            std::cout << "Note off Event"<< std::endl;
+            ProcessMidiEventData(file, event);
+        }
+        else
+        {
+            std::cout << "Unknown  status event:  " << std::bitset<8>(firstByte) << "|" << event_type <<std::endl;
+        }
+    }
+    else
+    {
+        if(mLastChannelEventType == MidiChannelEvent::Type::CONTROLLER)
+        {
+            std::cout << "Controller running event:  " <<std::endl;
+            ProcessMidiEventData(file, event, firstByte);
+        }
+        else if(mLastChannelEventType == MidiChannelEvent::Type::NOTE_ON)
+        {
+            std::cout << "Note on running event:  " <<std::endl;
+            ProcessMidiEventData(file, event, firstByte);
+        }
+        else if(mLastChannelEventType == MidiChannelEvent::Type::NOTE_OFF)
+        {
+            std::cout << "Note off running event:  " <<std::endl;
+            ProcessMidiEventData(file, event, firstByte);
+        }
+        else
+        {
+            std::cout << "Unknown running event:  " <<std::endl;
+        }
+    }
+    return true;
+}
 
-	mTrackByteCount = 0;
-	MidiTrack track;
-	ProcessEvent(file);
-	std::cout << "Track byte count: "<< mTrackByteCount << std::endl;
+bool MidiReader::ProcessEvent(std::ifstream& file, MidiTrack& track)
+{
+    char c;
+    int timeDelta = ProcessTimeDelta(file);
 
-	ProcessEvent(file);
+    file.get(c);
+    std::cout << std::bitset<8>(c) << std::endl;
+    mTrackByteCount ++;
+    if(MidiEvent::IsMetaEvent(c))
+    {
+        MetaMidiEvent event;
+        event.SetTimeDelta(timeDelta);
+        std::cout << "Meta event " <<std::endl;
+        ProcessMetaEvent(file, event);
+        track.AddEvent(event);
+    }
+    else if(MidiEvent::IsSysExEvent(c))
+    {
+        std::cout << "Sysex event" << std::endl;
+    }
+    else
+    {   // Midi event
+        MidiChannelEvent event;
+        event.SetTimeDelta(timeDelta);
+        std::cout << "Midi event" << std::endl;
+        ProcessMidiChannelEvent(file, c, event);
+    }
+    return true;
+}
 
-	mDocument.mTracks.push_back(track);
-	return true;
+bool MidiReader::ProcessTrackChunk(std::ifstream& file, bool debug)
+{
+    if(!BinaryFile::CheckNextDWord(file, TrackChunkLabel))
+    {
+        return false;
+    }
+
+    int chunkSize = 0;
+    if(!BinaryFile::GetNextDWord(file, chunkSize))
+    {
+        return false;
+    }
+    std::cout << "Chunk size: "<< chunkSize << std::endl;
+
+    mTrackByteCount = 0;
+    MidiTrack track;
+    unsigned iter_count = 0;
+    while(mTrackByteCount < chunkSize)
+    {
+        std::cout << "-------------" << std::endl;
+        ProcessEvent(file, track);
+        std::cout << "Track byte count: "<< mTrackByteCount << std::endl;
+        if(debug && iter_count == 25)
+        {
+            return true;
+        }
+        iter_count ++;
+    }
+
+    mDocument.mTracks.push_back(track);
+    return true;
 }
 
 void MidiReader::Read(const std::string& path)
 {
-	std::ifstream file(path);
-	if(!ProcessHeader(file))
-	{
-		std::cout << "Problem processing header" << std::endl;
-	}
+    std::ifstream file(path);
+    if(!ProcessHeader(file))
+    {
+        std::cout << "Problem processing header" << std::endl;
+        return;
+    }
 
-	if(!ProcessTrackChunk(file))
-	{
-		std::cout << "Problem processing track chunk" << std::endl;
-	}
+    int trackCount = 0;
+    if(!ProcessTrackChunk(file))
+    {
+        std::cout << "Problem processing track chunk" << std::endl;
+        return;
+    }
+    trackCount ++;
+
+    std::cout << "****************************************" << std::endl;
+    std::cout << "Track 2" << std::endl;
+
+    if(!ProcessTrackChunk(file, true))
+    {
+        std::cout << "Problem processing track chunk" << std::endl;
+        return;
+    }
+    trackCount ++;
 
 
-	file.close();
+    file.close();
 }

src/audio/midi/MidiReader.h

@@ -2,30 +2,42 @@
 
 #include "MidiDocument.h"
 #include "MetaMidiEvent.h"
+#include "MidiChannelEvent.h"
 #include <string>
 
 class MidiReader
 {
-	static constexpr const char TrackChunkLabel[] = "MTrk";
-	static constexpr const char HeaderLabel[] = "MThd";
-	MidiDocument mDocument;
-	unsigned mTrackByteCount;
+    static constexpr const char TrackChunkLabel[] = "MTrk";
+    static constexpr const char HeaderLabel[] = "MThd";
+    MidiDocument mDocument;
+    unsigned mTrackByteCount;
+    MidiChannelEvent::Type mLastChannelEventType;
 
 public:
 
-	MidiReader();
+    MidiReader();
 
-	void Read(const std::string& path);
+    void Read(const std::string& path);
 
 private:
 
-	bool ProcessHeader(std::ifstream& file);
+    bool ProcessHeader(std::ifstream& file);
 
-	bool ProcessTrackChunk(std::ifstream& file);
+    bool ProcessTimeDivision(std::ifstream& file);
 
-	bool ProcessEvent(std::ifstream& file);
+    bool ProcessTrackChunk(std::ifstream& file, bool debug=false);
 
-	bool ProcessMetaEvent(std::ifstream& file, MetaMidiEvent& event);
+    bool ProcessEvent(std::ifstream& file, MidiTrack& track);
 
-	int ProcessTimeDelta(std::ifstream& file);
+    bool ProcessMidiEventData(std::ifstream& file, MidiChannelEvent& event, char c);
+    bool ProcessMidiEventData(std::ifstream& file, MidiChannelEvent& event);
+
+    bool ProcessMidiChannelEvent(std::ifstream& file, char firstByte, MidiChannelEvent& event);
+    bool ProcessMetaEvent(std::ifstream& file, MetaMidiEvent& event);
+
+    int ProcessTimeDelta(std::ifstream& file);
+
+    bool ProcessTrackNameMetaEvent(std::ifstream& file, MetaMidiEvent& event);
+    bool ProcessSetTempoMetaEvent(std::ifstream& file, MetaMidiEvent& event);
+    bool ProcessTimeSignatureMetaEvent(std::ifstream& file, MetaMidiEvent& event);
 };

src/core/CMakeLists.txt

@@ -3,6 +3,7 @@ list(APPEND core_LIB_INCLUDES
     Color.cpp
     CommandLineArgs.cpp
     loggers/FileLogger.cpp
+    file_utilities/BinaryFile.cpp
     StringUtils.cpp
     http/HttpResponse.cpp)
 

src/core/file_utilities/BinaryFile.cpp

@@ -0,0 +1,88 @@
+#include "BinaryFile.h"
+#include "ByteUtils.h"
+
+bool BinaryFile::GetNextByteAsInt(std::ifstream& file, int& target)
+{
+    char c;
+    file.get(c);
+    target = int(c);
+    return true;
+}
+
+bool BinaryFile::GetNextNBytes(std::ifstream& file, char* buffer, unsigned number)
+{
+    char c;
+    for(unsigned idx=0; idx<number; idx++)
+    {
+        if(file.get(c))
+        {
+            buffer[idx] = c;
+        }
+        else
+        {
+            return false;
+        }
+    }
+    return true;
+}
+
+bool BinaryFile::GetNextWord(std::ifstream& file, char* buffer)
+{
+    return GetNextNBytes(file, buffer, ByteUtils::BYTES_PER_WORD);
+}
+
+bool BinaryFile::GetNextDWord(std::ifstream& file, char* buffer)
+{
+    return GetNextNBytes(file, buffer, ByteUtils::BYTES_PER_DWORD);
+}
+
+bool BinaryFile::GetNextWord(std::ifstream& file, int& target, bool reverse)
+{
+    char buffer[ByteUtils::BYTES_PER_WORD];
+    if(!BinaryFile::GetNextWord(file, buffer))
+    {
+        return false;
+    }
+    target = ByteUtils::ToWord(buffer, reverse);
+    return true;
+}
+
+bool BinaryFile::GetNextDWord(std::ifstream& file, int& target)
+{
+    char buffer[ByteUtils::BYTES_PER_DWORD];
+    if(!BinaryFile::GetNextDWord(file, buffer))
+    {
+        return false;
+    }
+    target = ByteUtils::ToDWord(buffer);
+    return true;
+}
+
+bool BinaryFile::CheckNextDWord(std::ifstream& file, const char* target)
+{
+    char buffer[ByteUtils::BYTES_PER_DWORD];
+    if(!BinaryFile::GetNextDWord(file, buffer))
+    {
+        return false;
+    }
+
+    if(!ByteUtils::CompareDWords(buffer, target))
+    {
+        return false;
+    }
+    return true;
+}
+
+bool BinaryFile::GetNextString(std::ifstream& file, std::string& target, unsigned numBytes)
+{
+    char c;
+    for(unsigned idx=0; idx<numBytes; idx++)
+    {
+        if(!file.get(c))
+        {
+            return false;
+        }
+        target += c;
+    }
+    return true;
+}

src/core/file_utilities/BinaryFile.h

@@ -0,0 +1,25 @@
+#pragma once
+
+#include <fstream>
+#include <string>
+
+class BinaryFile
+{
+public:
+
+    static bool GetNextByteAsInt(std::ifstream& file, int& target);
+
+    static bool GetNextNBytes(std::ifstream& file, char* buffer, unsigned numBytes);
+
+    static bool GetNextWord(std::ifstream& file, char* buffer);
+
+    static bool GetNextDWord(std::ifstream& file, char* buffer);
+
+    static bool GetNextWord(std::ifstream& file, int& target, bool reverse = true);
+
+    static bool GetNextDWord(std::ifstream& file, int& target);
+
+    static bool CheckNextDWord(std::ifstream& file, const char* target);
+
+    static bool GetNextString(std::ifstream& file, std::string& target, unsigned numBytes);
+};