lauchmelder/MusicalPi
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did a thing

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Lauchmelder 2022-04-09 23:18:09 +02:00
parent 553a02cc25
commit 1735fe98e7
1 changed files with 20 additions and 119 deletions
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139
src/main.c
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@ -7,6 +7,7 @@
#include <stdlib.h>
#include <pthread.h>
#include <stdatomic.h>
#include <sys/time.h>
#include "midi_interface.h"
#include "midi_parser.h"
@ -15,51 +16,22 @@ uint32_t time_per_quarter;
uint32_t ticks_per_quarter;
MidiInterface* interface;
typedef struct Offset
{
signed char pitch;
signed char velocity;
} Offset;
static const Offset pattern[] = {
{ 0, 0 },
{ -5, -11 },
{ -9, -11 },
{ -12, -11 },
{ -9, -11 },
{ -5, -11 },
{ -1, 0 },
{ -5, -11 },
{ -9, -11 },
{ -12, -11 },
{ -9, -11 },
{ -5, -11 },
{ -2, 0 },
{ -5, -11 },
{ -9, -11 },
{ -12, -11 },
{ -9, -11 },
{ -5, -11 },
{ -3, 0 },
{ -5, -11 },
{ -9, -11 },
{ -12, -11 },
{ -9, -11 },
{ -5, -11 }
};
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* play_track(void* data);
int main(int argc, char** argv)
{
if(argc != 2)
{
fprintf(stderr, "Usage: musicalpi <midi file>");
exit(-1);
}
MidiParser* parser;
parser = parseMidi("out/pushing_onwards.mid", false, true);
parser = parseMidi(argv[1], false, true);
if(!parser)
{
fprintf(stderr, "Failed to read MIDI file\n");
@ -81,52 +53,6 @@ int main(int argc, char** argv)
playing = 1;
/*
int key_down = 0;
Note current_note;
pthread_t arpeggio_thread;
pthread_create(&arpeggio_thread, NULL, arpeggio_loop, (void*)interface);
Message* message;
create_message(&message);
for(;;)
{
result = read_midi_device(interface, message);
if(result < 0)
{
fprintf(stderr, "Failed to read message: %s\n", midi_strerror(result));
if(result == MIDI_UNKNOWN_STATUS_BYTE)
{
fprintf(stderr, "%x\n", message->type);
exit(result);
}
}
// if(message->type != SYSTEM_EXCLUSIVE)
// printf("ch: %x, s: %x -- %02x %02x\n", message->channel, message->type, message->data[0], message->data[1]);
if(message->type == NOTE_ON)
{
key_down = 1;
note = &current_note;
current_note.channel = 0x90;
current_note.pitch = message->data[0];
current_note.velocity = message->data[1];
}
else if(message->type == NOTE_OFF && message->data[0] == note->pitch)
{
key_down = 0;
note = NULL;
step = 0;
}
}
pthread_join(arpeggio_thread, NULL);
free_message(message);
*/
for(int i = 0; i < parser->nbOfTracks; i++)
{
pthread_join(threads[i], NULL);
@ -138,37 +64,6 @@ int main(int argc, char** argv)
return 0;
}
void *arpeggio_loop(void* data)
{
MidiInterface* interface = (MidiInterface*)data;
Message* message;
create_message(&message);
message->channel = 0;
message->length = 2;
message->type = NOTE_ON;
while(stop == 0)
{
if(note != NULL)
{
Note out = *note;
message->data[0] = out.pitch + pattern[step].pitch;
message->data[1] = out.velocity + pattern[step].velocity;
int result = write_midi_device(interface, message);
if(result < 0)
fprintf(stderr, "Failed to send message: %s\n", midi_strerror(result));
step++;
if(step >= (sizeof(pattern) / sizeof(Offset)))
step = 0;
usleep(166666);
}
}
free_message(message);
}
void* play_track(void* data)
{
Track* track = (Track*)data;
@ -178,14 +73,20 @@ void* play_track(void* data)
message->length = 2;
int current_event = 0;
struct timeval begin, end;
while(!playing);
gettimeofday(&begin, NULL);
while(current_event < track->nbOfEvents)
{
if(!playing)
continue;
Event event = track->events[current_event];
usleep(event.timeToAppear * time_per_quarter / ticks_per_quarter);
gettimeofday(&end, NULL);
uint64_t deltatime = ((end.tv_sec - begin.tv_sec) * 1000000) + (end.tv_usec - begin.tv_usec);
if(event.timeToAppear > 0)
usleep(event.timeToAppear * time_per_quarter / ticks_per_quarter - deltatime);
gettimeofday(&begin, NULL);
if(event.type == MidiNotePressed || event.type == MidiNoteReleased)
{