From 9db025199644833d70e729d03e6151f8cce58ed5 Mon Sep 17 00:00:00 2001
From: sowgro <tpoke.ferrari@gmail.com>
Date: Tue, 9 Dec 2025 14:41:02 -0500
Subject: Parser for one track working

---
 project/Core/Inc/Homework/endian_converters.h |  2 +
 project/Core/Src/Project/player.c             | 67 +++++++++++++++++++++++++++
 project/Core/Src/Project/song_info.c          |  2 +
 project/Core/Src/main.c                       |  4 +-
 4 files changed, 74 insertions(+), 1 deletion(-)
 create mode 100644 project/Core/Src/Project/player.c

(limited to 'project/Core')

diff --git a/project/Core/Inc/Homework/endian_converters.h b/project/Core/Inc/Homework/endian_converters.h
index a4d959c..24b5d6c 100644
--- a/project/Core/Inc/Homework/endian_converters.h
+++ b/project/Core/Inc/Homework/endian_converters.h
@@ -8,6 +8,8 @@
 #ifndef INC_HOMEWORK_ENDIAN_CONVERTERS_H_
 #define INC_HOMEWORK_ENDIAN_CONVERTERS_H_
 
+#include <stdint.h>
+
 uint16_t convert_to_uint16(uint8_t* p_value);
 uint32_t convert_to_uint24(uint8_t* p_value);
 uint32_t convert_to_uint32(uint8_t* p_value);
diff --git a/project/Core/Src/Project/player.c b/project/Core/Src/Project/player.c
new file mode 100644
index 0000000..71531a8
--- /dev/null
+++ b/project/Core/Src/Project/player.c
@@ -0,0 +1,67 @@
+/*
+ * 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);
+}
diff --git a/project/Core/Src/Project/song_info.c b/project/Core/Src/Project/song_info.c
index 75f6dd9..4a94954 100644
--- a/project/Core/Src/Project/song_info.c
+++ b/project/Core/Src/Project/song_info.c
@@ -47,5 +47,7 @@ song_info_t get_song_info(uint8_t *p_song) {
 		}
 	}
 
+
+
 	return ret;
 }
diff --git a/project/Core/Src/main.c b/project/Core/Src/main.c
index b78da42..29c8f5e 100644
--- a/project/Core/Src/main.c
+++ b/project/Core/Src/main.c
@@ -14,6 +14,7 @@
 #include "project.h"
 #include "hw8.h"
 #include "activity12.h"
+#include "song.h"
 
 int main(void){
 
@@ -31,6 +32,7 @@ int main(void){
 //	hw6_run();
 //	activity12_run();
 //	activity13_run();
-	hw8_run();
+//	hw8_run();
+	parse_song(get_song(0).p_song + 109);
 }
 
-- 
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