From dae71723defca5c6313142fa9d5ed17324f00dd1 Mon Sep 17 00:00:00 2001
From: Ilia Pozdnyakov <iliazeus@proton.me>
Date: Sat, 12 Oct 2024 17:45:30 +0500
Subject: [PATCH] fix a bug with mismatched buffer lengths

---
 package-lock.json | 4 ++--
 package.json      | 2 +-
 src/index.ts      | 7 +++----
 3 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index a8d3e90..a624910 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "punkomatic",
-  "version": "0.5.3",
+  "version": "0.5.4",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "punkomatic",
-      "version": "0.5.3",
+      "version": "0.5.4",
       "license": "MIT",
       "devDependencies": {
         "@types/node": "^20.11.30",
diff --git a/package.json b/package.json
index 66cbc79..58905a9 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
     "node": "./dist/punkomatic.node.js",
     "browser": "./dist/punkomatic.browser.js"
   },
-  "version": "0.5.3",
+  "version": "0.5.4",
   "description": "a tool to parse and render Punk-O-Matic 2 song data",
   "scripts": {
     "build": "./scripts/build.sh",
diff --git a/src/index.ts b/src/index.ts
index eb7ac0b..7b50e23 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -168,8 +168,7 @@ export async function renderSong(
 
     totalEventCount += events.length;
 
-    const channelSampleCount =
-      events.at(-1)!.endTime + events.at(-1)!.release - events.at(0)!.startTime;
+    const channelSampleCount = events.at(-1)!.endTime + events.at(-1)!.release;
     if (channelSampleCount > totalSampleCount) totalSampleCount = channelSampleCount;
 
     const channelStartOffset = events[0].startTime < 0 ? Math.abs(events[0].startTime) : 0;
@@ -177,7 +176,7 @@ export async function renderSong(
   }
 
   const audioContext = new wa.OfflineAudioContext({
-    length: totalSampleCount,
+    length: totalStartOffset + totalSampleCount,
     sampleRate: 44100,
     numberOfChannels: 2,
   });
@@ -232,7 +231,7 @@ export async function renderSong(
           .getChannelData(c)
           .subarray(
             totalStartOffset + event.startTime,
-            totalStartOffset + event.endTime + event.release,
+            totalStartOffset + event.startTime + src.length,
           );
 
         dst.set(src);