minor changes

src/main.c

@@ -9,13 +9,11 @@
 #include <stdatomic.h>
 
 #include "midi_interface.h"
+#include "midi_parser.h"
 
-typedef struct Note
-{
-    unsigned char channel;
-    unsigned char pitch;
-    unsigned char velocity;
-} Note;
+uint32_t time_per_quarter;
+uint32_t ticks_per_quarter;
+MidiInterface* interface;
 
 typedef struct Offset
 {
@@ -53,16 +51,37 @@ static const Offset pattern[] = {
 static int _Atomic stop = ATOMIC_VAR_INIT(0);
 static int _Atomic step = ATOMIC_VAR_INIT(0);
 static Note* _Atomic note = ATOMIC_VAR_INIT(NULL);
+static int _Atomic playing = ATOMIC_VAR_INIT(0);
 
-void *arpeggio_loop(void* data);
+void* arpeggio_loop(void* data);
+void* play_track(void* data);
 
 int main(int argc, char** argv)
 {
-    MidiInterface* interface;
+    MidiParser* parser;
+    parser = parseMidi("out/pushing_onwards.mid", false, true);
+    if(!parser)
+    {
+        fprintf(stderr, "Failed to read MIDI file\n");
+        exit(-1);
+    }
+
+    time_per_quarter = ((uint32_t*)(parser->tracks[0].events[2].infos))[0];
+    ticks_per_quarter = parser->ticks;
+
     int result = open_midi_device(&interface, NULL);
     if(result < 0)
         exit(result);
 
+    pthread_t* threads = (pthread_t*)malloc(parser->nbOfTracks * sizeof(pthread_t));
+    for(int i = 0; i < parser->nbOfTracks; i++)
+    {
+        pthread_create(threads + i, NULL, play_track, parser->tracks + i);
+    }
+
+    playing = 1;
+
+    /*
     int key_down = 0;
     Note current_note;
 
@@ -107,7 +126,15 @@ int main(int argc, char** argv)
 
     pthread_join(arpeggio_thread, NULL);
     free_message(message);
+    */
+    for(int i = 0; i < parser->nbOfTracks; i++)
+    {
+        pthread_join(threads[i], NULL);
+    }
+    free(threads);
     close_midi_device(interface);
+    
+
     return 0;
 }
 
@@ -140,4 +167,37 @@ void *arpeggio_loop(void* data)
     }
 
     free_message(message);
+}
+
+void* play_track(void* data)
+{
+    Track* track = (Track*)data;
+    Message* message;
+    create_message(&message);
+    message->channel = 0;
+    message->length = 2;
+
+    int current_event = 0;
+
+    while(current_event < track->nbOfEvents)
+    {
+        if(!playing)
+            continue;
+
+        Event event = track->events[current_event];
+        usleep(event.timeToAppear * time_per_quarter / ticks_per_quarter);
+
+        if(event.type == MidiNotePressed || event.type == MidiNoteReleased)
+        {
+            message->type = (event.type == MidiNotePressed) ? NOTE_ON : NOTE_OFF;
+            message->data = event.infos + 1;
+
+            // printf("Sending %d %d\n", message->data[0], message->data[1]);
+            int result = write_midi_device(interface, message);
+            if(result < 0)
+                fprintf(stderr, "Write err: %s\n", midi_strerror(result));
+        }
+
+        current_event++;
+    }
 }

src/midi_interface.c

@@ -94,6 +94,11 @@ int write_midi_device(MidiInterface* interface, const Message* buffer)
         return MIDI_WRITE_ERROR;
 }
 
+int write_midi_device_raw(MidiInterface* interface, const char* buffer)
+{
+    //
+}
+
 int try_open_device(const char* device)
 {
     int fd = open(device, O_RDWR, 0);

src/midi_interface.h

@@ -17,6 +17,7 @@ int close_midi_device(MidiInterface* interface);
 
 int read_midi_device(MidiInterface* interface, Message* buffer);
 int write_midi_device(MidiInterface* interface, const Message* buffer);
+int write_midi_device_raw(MidiInterface* interface, const char* buffer);
 
 
 #endif

src/midi_parser.h

@@ -0,0 +1,91 @@
+/**
+ * https://github.com/Gegel85/midi_parser
+ */
+
+#ifndef __LIB_MIDI_PARSER_HEADER_
+#define __LIB_MIDI_PARSER_HEADER_
+
+#include <stdbool.h>
+
+typedef enum {
+	MidiSequenceNumber,
+	MidiTextEvent,
+	MidiNewLyric,
+	MidiNewMarker,
+	MidiNewCuePoint,
+	MidiNewChannelPrefix,
+	MidiPortChange,
+	MidiTempoChanged,
+	MidiSMTPEOffset,
+	MidiNewTimeSignature,
+	MidiNewKeySignature,
+	MidiSequencerSpecificEvent,
+	MidiNoteReleased,
+	MidiNotePressed,
+	MidiPolyphonicPressure,
+	MidiControllerValueChanged,
+	MidiProgramChanged,
+	MidiPressureOfChannelChanged,
+	MidiPitchBendChanged,
+} EventType;
+
+typedef	struct {
+	EventType	type;
+	int		timeToAppear;
+	void		*infos;
+} Event;
+
+typedef	struct {
+	unsigned char	numerator;
+	unsigned char	denominator;
+	unsigned char	clockTicksPerMetTick;
+	unsigned char	ticksPerQuarterNote;
+} MidiTimeSignature;
+
+typedef struct {
+	unsigned char	channel;
+	unsigned char	pitch;
+	unsigned char	velocity;
+} MidiNote;
+
+typedef struct	Note {
+	unsigned	char	pitch;
+	unsigned	char	channel;
+	unsigned	char	velocity;
+	unsigned	char	fadeOutVelocity;
+	unsigned long	int	timeBeforeAppear;
+	unsigned long	int	duration;
+} Note;
+
+typedef struct {
+	char		*copyright;
+	char		*name;
+	char		*instrumentName;
+	int		nbOfEvents;
+	int		nbOfNotes;
+	Note		*notes;
+	Event		*events;
+} Track;
+
+typedef struct	NoteList {
+	Note			*note;
+	struct	NoteList	*next;
+	struct	NoteList	*prev;
+} NoteList;
+
+typedef struct {
+	unsigned short	format;
+	short		nbOfTracks;
+	char		fps;
+	short		ticks;
+	int		nbOfNotes;
+	Track		*tracks;
+} MidiParser;
+
+bool		parseMidiTrack(unsigned char *buffer, int buffLen, Track *track, bool outputDebug, MidiParser *result, int posInFile, bool createNoteArray);
+MidiParser	*parseMidi(char *path, bool outputDebug, bool createNoteArray);
+char		*getNoteString(char note);
+void		deleteTrack(Track *track);
+void		deleteMidiParserStruct(MidiParser *result);
+
+#endif