add auto-release based on actual sample length and envelope applied during playback instead of after and instead of specifying the DPCM length just use the wav length

synthetizer.cpp

@@ -37,17 +37,21 @@ struct Wave {
     std::vector<int16_t> sampleData;
 };
 
-bool loadWavFile(const std::string& path, std::vector<int16_t>& outSamples) {
+bool loadWavFile(const std::string& path, std::vector<int16_t>& outSamples, int& outDurationMs) {
     std::ifstream file(path, std::ios::binary);
     if (!file.is_open()) return false;
 
-    file.seekg(44); // skip header
+    file.seekg(44); // skip header (basic .wav, no format parsing)
     outSamples.clear();
 
     int16_t sample;
     while (file.read(reinterpret_cast<char*>(&sample), sizeof(sample))) {
         outSamples.push_back(sample);
     }
+
+    int sampleRate = 44100;  // hardcoded for now
+    outDurationMs = static_cast<int>((outSamples.size() * 1000.0) / sampleRate);
+
     return true;
 }
 
@@ -126,9 +130,8 @@ bool loadWaveParams(const std::string& filename, std::vector<Wave>& waves, int&
         }
 
         int start_ms, duration_ms;
-        ss >> start_ms >> duration_ms;
+        ss >> start_ms;
         wave.start_ms = start_ms;
-        wave.duration_ms = duration_ms;
 
         if (wave.type == DPCM) {
             std::string token;
@@ -160,14 +163,21 @@ bool loadWaveParams(const std::string& filename, std::vector<Wave>& waves, int&
             wave.sweepDepth = 0.0;
             wave.sweepRate = 0.0;
 
-            if (!loadWavFile(wave.samplePath, wave.sampleData)) {
+            int actualLength = 0;
+            if (!loadWavFile(wave.samplePath, wave.sampleData, actualLength)) {
                 std::cout << "Failed to load sample: " << wave.samplePath << std::endl;
             }
 
+            wave.duration_ms = actualLength;
+            wave.start_ms = start_ms;
+
             waves.push_back(wave);
             continue;
         }
 
+        ss >> duration_ms;
+        wave.duration_ms = duration_ms;
+
         // Standard wave parameters
         double volume = 1.0;
         double duty = 0.5;