From 519f868c445a86b988772307ea1f1e2fc95fe54a Mon Sep 17 00:00:00 2001
From: sowgro <tpoke.ferrari@gmail.com>
Date: Sat, 13 Dec 2025 22:13:27 -0500
Subject: all player code written but untested

---
 project/Core/Src/Project/player.c | 34 +++++++++++++++++++++++++++++-----
 1 file changed, 29 insertions(+), 5 deletions(-)

(limited to 'project/Core/Src/Project/player.c')

diff --git a/project/Core/Src/Project/player.c b/project/Core/Src/Project/player.c
index f9ffbce..53ae0f8 100644
--- a/project/Core/Src/Project/player.c
+++ b/project/Core/Src/Project/player.c
@@ -12,11 +12,34 @@
 #include "activity4.h"
 #include "song_info.h"
 #include "player.h"
+#include "systick.h"
+#include "tone.h"
 
 #define NOTE_OFF_EVENT (0)
 #define NOTE_ON_EVENT (1)
 #define KEY_PRESSURE (2)
 
+static track_t tracks[16];
+static int nTracks;
+static int startTime;
+
+void play_notes(int count) {
+	int curAbsTime = count - startTime;
+	for (int i = 0; i < nTracks; i++) {
+		note_event_t curEvent = tracks[i].events[tracks[i].curEventIndex];
+		if (curEvent.abs_time >= curAbsTime) {
+			switch (curEvent.ev_type) {
+			case NOTE_OFF_EVENT:
+				remove_tone(curEvent.key_number); break;
+			case NOTE_ON_EVENT:
+				add_tone(curEvent.key_number, curEvent.value); break;
+			}
+		}
+		tracks[i].curEventIndex++;
+	}
+	play_tones();
+}
+
 void parse_song(uint8_t *p_song) {
 	header_t header;
 	header = get_header(p_song);
@@ -25,13 +48,13 @@ void parse_song(uint8_t *p_song) {
 	song_info_t song_info;
 	p_song = get_song_info(p_song, &song_info);
 
-	note_event_t trackEvents[header.ntrcks][1024];
 	for(int i = 0; i < header.ntrcks; i++){
-		p_song = parse_track(p_song, trackEvents[i]);
+		p_song = parse_track(p_song, &tracks[i]);
 	}
+	nTracks = header.ntrcks;
 }
 
-uint8_t *parse_track(uint8_t *p_song, note_event_t *events) {
+uint8_t *parse_track(uint8_t *p_song, track_t *track) {
 	p_song += 4; // skip MTrk
 	uint32_t MTrk_len = convert_to_uint32(p_song);
 	p_song += 4;
@@ -68,9 +91,10 @@ uint8_t *parse_track(uint8_t *p_song, note_event_t *events) {
 		note.value = *p_song;
 		p_song++;
 
-		events[curEvent++] = note;
+		track->events[curEvent++] = note;
 	}
-	events[curEvent] = NULL_EVENT; // null terminate array
+	track->nEvents = curEvent;
+	track->curEventIndex = 0;
 
 	return p_song;
 }
-- 
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