From 8ce886883eaa984e770f8e335b0d06b35bb29dab Mon Sep 17 00:00:00 2001
From: Isaac0-dev <62234577+Isaac0-dev@users.noreply.github.com>
Date: Mon, 18 May 2026 00:47:38 +1000
Subject: [PATCH] rabbit review

---
 data/dynos_mgr_audio.cpp | 35 ++++++++++++++++++++++++++++++-----
 data/dynos_mgr_pack.cpp  | 38 ++++++++++++++++++++++++++++++++------
 2 files changed, 62 insertions(+), 11 deletions(-)

diff --git a/data/dynos_mgr_audio.cpp b/data/dynos_mgr_audio.cpp
index 2190fc835..d55cece98 100644
--- a/data/dynos_mgr_audio.cpp
+++ b/data/dynos_mgr_audio.cpp
@@ -40,12 +40,12 @@ void DynOS_Audio_ResetMods() {
     audio_init();
     for (s32 i = 0; i < MAX_AUDIO_OVERRIDE; i++) {
 #ifdef VERSION_EU
-        if (!sAudioOverrides[i].pack.enabled || sAudioOverrides[i].mod.enabled) {
+        if (!sAudioOverrides[i].pack.enabled && sAudioOverrides[i].mod.enabled) {
             if (i >= SEQ_EVENT_CUTSCENE_LAKITU) {
                 sBackgroundMusicDefaultVolume[i] = 75;
-                return;
+            } else {
+                sBackgroundMusicDefaultVolume[i] = sBackgroundMusicDefaultVolumeDefault[i];
             }
-            sBackgroundMusicDefaultVolume[i] = sBackgroundMusicDefaultVolumeDefault[i];
         } else if (sAudioOverrides[i].pack.enabled) {
             // keep pack override default volume
             sBackgroundMusicDefaultVolume[i] = sAudioOverrides[i].pack.defaultVolume;
@@ -68,6 +68,7 @@ static bool DynOS_Audio_LoadEntry(AudioOverrideEntry* aOverride, u8 aSequenceId,
     if (gOverrideBank > -1) { aOverride->bank = gOverrideBank; }
 
     if (aOverride->loaded) {
+        sound_set_background_music_default_volume(aSequenceId, aOverride->defaultVolume);
         *aSeqData = aOverride->buffer;
         *aBankId = aOverride->bank;
         return true;
@@ -149,20 +150,44 @@ static void DynOS_Audio_HotSwapIfActive(u8 aSequenceId) {
 void DynOS_Audio_ActivateOverride(AudioOverrideEntry* aOverride) {
     if (aOverride == NULL || aOverride->enabled) { return; }
     aOverride->enabled = true;
+    sound_set_background_music_default_volume(aOverride->sequenceId, aOverride->defaultVolume);
     DynOS_Audio_HotSwapIfActive(aOverride->sequenceId);
 }
 
 void DynOS_Audio_DeactivateOverride(AudioOverrideEntry* aOverride) {
     if (aOverride == NULL || !aOverride->enabled) { return; }
     aOverride->enabled = false;
+    if (sAudioOverrides[aOverride->sequenceId].mod.enabled) {
+        sound_set_background_music_default_volume(
+            aOverride->sequenceId,
+            sAudioOverrides[aOverride->sequenceId].mod.defaultVolume
+        );
+    } else {
+        sound_reset_background_music_default_volume(aOverride->sequenceId);
+    }
     DynOS_Audio_HotSwapIfActive(aOverride->sequenceId);
 }
 
 AudioOverrideEntry* DynOS_Audio_CreateOverride(u8 aSequenceId, u8 aBankId, u8 aDefaultVolume, const char *aFilepath, bool aIsPack) {
-    if (aSequenceId >= MAX_AUDIO_OVERRIDE) { return NULL; }
+    if (aSequenceId >= MAX_AUDIO_OVERRIDE) {
+        PrintError("Invalid sequenceId while creating override: %d", aSequenceId);
+        return NULL;
+    }
+
+    if (aBankId >= 64) {
+        PrintError("Invalid bankId while creating override: %d", aBankId);
+        return NULL;
+    }
+
     AudioOverrideEntry* override = aIsPack ? &sAudioOverrides[aSequenceId].pack : &sAudioOverrides[aSequenceId].mod;
 
-    if (override->enabled) { audio_init(); }
+    if (override->enabled) {
+        if (aIsPack) {
+            PrintError("Pack sequence override already exists for sequence ID %d", aSequenceId);
+            return NULL;
+        }
+        audio_init();
+    }
     DynOS_Audio_ResetEntry(override);
     Print("Loading audio: %s", aFilepath);
     override->sequenceId = aSequenceId;
diff --git a/data/dynos_mgr_pack.cpp b/data/dynos_mgr_pack.cpp
index 6e948d72a..09b184de4 100644
--- a/data/dynos_mgr_pack.cpp
+++ b/data/dynos_mgr_pack.cpp
@@ -1,5 +1,6 @@
 #include <deque>
 #include <regex>
+#include <charconv>
 #include "dynos.cpp.h"
 extern "C" {
 #include "engine/graph_node.h"
@@ -10,6 +11,23 @@ static std::deque<PackData>& DynosPacks() {
     return sDynosPacks;
 }
 
+static bool ParseU8(const std::string& s, u8& out) {
+    unsigned int value = 0;
+    auto [ptr, ec] = std::from_chars(s.data(), s.data() + s.size(), value);
+
+    // Reject:
+    // - parse errors
+    // - overflow
+    // - trailing junk
+    // - values outside u8 range
+    if (ec != std::errc() || ptr != s.data() + s.size() || value > 0xFF) {
+        return false;
+    }
+
+    out = static_cast<u8>(value);
+    return true;
+}
+
 static void ScanPackBins(struct PackData* aPack) {
     DIR *_PackDir = opendir(aPack->mPath.c_str());
     if (!_PackDir) { return; }
@@ -45,13 +63,21 @@ static void ScanPackBins(struct PackData* aPack) {
             std::regex re(".*_(\\d+)_(\\d+)_(\\d+)$");
             std::smatch match;
             if (std::regex_match(seqName, match, re) && match.size() == 4) {
-                u8 sequenceId = static_cast<u8>(std::stoi(match[1].str()));
-                u8 bankId = static_cast<u8>(std::stoi(match[2].str()));
-                u8 defaultVolume = static_cast<u8>(std::stoi(match[3].str()));
-                AudioOverrideEntry* audioOverride = DynOS_Audio_CreateOverride(sequenceId, bankId, defaultVolume, _FileName.c_str(), true);
-                if (audioOverride) {
-                    aPack->mAudioOverrides.push_back(audioOverride);
+                u8 sequenceId, bankId, defaultVolume;
+                if (ParseU8(match[1].str(), sequenceId) &&
+                    ParseU8(match[2].str(), bankId) &&
+                    ParseU8(match[3].str(), defaultVolume)
+                ) {
+                    AudioOverrideEntry* audioOverride = DynOS_Audio_CreateOverride(sequenceId, bankId, defaultVolume, _FileName.c_str(), true);
+                    if (audioOverride) {
+                        aPack->mAudioOverrides.push_back(audioOverride);
+                    }
                 }
+            } else {
+                PrintError(
+                    "Invalid sequence override filename (expected format: <name>_<sequenceId>_<bankId>_<defaultVolume>.m64): '%s.m64'",
+                    _SeqName.begin()
+                );
             }
         }
     }