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/*
* player.c
*
* Created on: Nov 25, 2025
* Author: sowgro
*/
#include "endian_converters.h"
#include <stdint.h>
#include "endian_converters.h"
#include "hw8.h"
#define NOTE_OFF_EVENT (0)
#define NOTE_ON_EVENT (1)
#define KEY_PRESSURE (2)
typedef struct {
uint8_t ev_type;
uint32_t abs_time;
uint8_t key_number;
uint8_t value;
} note_event_t;
void parse_song(uint8_t *p_song) {
p_song += 4; // skip MTrk
uint32_t MTrk_len = convert_to_uint32(p_song);
p_song += 4;
note_event_t events[1/*track*/][1024/*event*/];
int curEvent = 0;
uint32_t prev_abs_time = 0;
for (uint8_t *p_end = p_song + MTrk_len; p_song != p_end; p_song++) {
note_event_t note;
parseDelay_result_t delay_result = parseDelay(p_song);
uint32_t abs_time = prev_abs_time + delay_result.value;
note.abs_time = abs_time;
prev_abs_time = abs_time;
p_song += delay_result.bytes_used;
if (*p_song >> 4 == 0b1000) {
note.ev_type = NOTE_OFF_EVENT;
} else if (*p_song >> 4 == 0b1001) {
note.ev_type = NOTE_ON_EVENT;
} else if (*p_song >> 4 == 0b1010) {
note.ev_type = KEY_PRESSURE;
} else {
continue;
}
// size_t channelNumber = *p_song && 0b00001111;
p_song++;
note.key_number = *p_song;
p_song++;
note.value = *p_song;
p_song++;
events[0][curEvent++] = note;
}
events[0][curEvent] = 0;
printf("done %p", events);
}
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