Fix playback auto-reset, add ffmpeg conversion, fix file browser Open button click

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

src/spectrogram.c

@@ -129,6 +129,7 @@ typedef struct {
     
     // Playback state
     bool isPlaying;
+    bool playbackFinished;  // Track if playback completed naturally
 } SpectrogramApp;
 
 // ============================================================================
@@ -331,10 +332,53 @@ static void FreeSTFT(StftResult* result)
 // Audio Loading
 // ============================================================================
 
+// Convert audio file to WAV using ffmpeg (if available)
+static bool ConvertToFFmpegWAV(const char* inputPath, char* outputPath, size_t outputSize)
+{
+    // Create temp WAV path
+    snprintf(outputPath, outputSize, "/tmp/rspektrum_temp_converted.wav");
+    
+    // Build ffmpeg command
+    char cmd[1024];
+    snprintf(cmd, sizeof(cmd), "ffmpeg -y -loglevel quiet -i \"%s\" -ar 48000 -ac 1 -f wav \"%s\" 2>&1", inputPath, outputPath);
+    
+    int result = system(cmd);
+    
+    if (result == 0 && FileExists(outputPath)) {
+        TraceLog(LOG_INFO, "FFmpeg conversion successful: %s", outputPath);
+        return true;
+    }
+    
+    TraceLog(LOG_WARNING, "FFmpeg conversion failed or not available");
+    return false;
+}
+
 static bool LoadWavFile(const char* filepath, AudioSignal* signal)
 {
+    const char* ext = GetFileExtension(filepath);
+    char convertedPath[512] = { 0 };
+    bool isConverted = false;
+    
+    // Check if we need to convert via ffmpeg
+    bool isWav = ext && (strcmp(ext, ".wav") == 0 || strcmp(ext, ".WAV") == 0);
+    
+    if (!isWav) {
+        // Try ffmpeg conversion
+        if (ConvertToFFmpegWAV(filepath, convertedPath, sizeof(convertedPath))) {
+            filepath = convertedPath;
+            isConverted = true;
+        } else {
+            TraceLog(LOG_ERROR, "Unsupported format and ffmpeg not available: %s", filepath);
+            return false;
+        }
+    }
+    
     Wave wave = LoadWave(filepath);
-    if (wave.data == NULL) { TraceLog(LOG_ERROR, "Failed to open WAV file: %s", filepath); return false; }
+    if (wave.data == NULL) { 
+        TraceLog(LOG_ERROR, "Failed to open WAV file: %s", filepath); 
+        if (isConverted) remove(convertedPath);
+        return false; 
+    }
     
     signal->sampleRate = wave.sampleRate;
     signal->channels = wave.channels;
@@ -363,6 +407,13 @@ static bool LoadWavFile(const char* filepath, AudioSignal* signal)
         signal->numSamples = monoSamples;
     }
     UnloadWave(wave);
+    
+    // Clean up temp file if converted
+    if (isConverted) {
+        remove(convertedPath);
+        TraceLog(LOG_INFO, "Cleaned up temp file: %s", convertedPath);
+    }
+    
     TraceLog(LOG_INFO, "Loaded WAV: %d Hz, %.2f sec, %d samples", signal->sampleRate, signal->duration, signal->numSamples);
     return true;
 }
@@ -708,14 +759,17 @@ static void DrawFileBrowser(void)
     Rectangle openBtn = { bx + bw - 160, btnY, 140, 38 };
     Rectangle cancelBtn = { bx + 15, btnY, 110, 38 };
 
-    if (CheckCollisionPointRec(GetMousePosition(), openBtn)) DrawRectangleRec(openBtn, (Color){ 80, 80, 90, 255 });
+    bool openHovered = CheckCollisionPointRec(GetMousePosition(), openBtn);
+    bool openClicked = openHovered && IsMouseButtonPressed(MOUSE_LEFT_BUTTON);
+    if (openHovered) DrawRectangleRec(openBtn, (Color){ 100, 100, 120, 255 });
+    else DrawRectangleRec(openBtn, (Color){ 80, 80, 90, 255 });
     DrawRectangleLinesEx(openBtn, 1, WHITE);
     DrawText("OPEN (Enter)", openBtn.x + 25, openBtn.y + 12, 16, WHITE);
 
     DrawRectangleRec(cancelBtn, (Color){ 100, 40, 40, 255 });
     DrawText("ESC Cancel", cancelBtn.x + 18, cancelBtn.y + 12, 16, WHITE);
 
-    if (IsKeyPressed(KEY_ENTER) && app.browserSelected >= 0 && app.browserFileCount > 0) LoadSelectedFile();
+    if ((IsKeyPressed(KEY_ENTER) || openClicked) && app.browserSelected >= 0 && app.browserFileCount > 0) LoadSelectedFile();
     if (IsKeyPressed(KEY_ESCAPE)) app.showFileBrowser = false;
     if (IsKeyPressed(KEY_UP) && app.browserSelected > 0 && app.browserFileCount > 0) {
         app.browserSelected--;
@@ -1011,6 +1065,7 @@ int main(int argc, char* argv[])
     app.visibleTextureValid = false;
     app.fftSize = FFT_SIZE_DEFAULT;
     app.isPlaying = false;
+    app.playbackFinished = false;
     
     GenerateColormapTexture();
     ScanDirectory(GetWorkingDirectory());
@@ -1063,7 +1118,16 @@ int main(int argc, char* argv[])
         if (app.showFileBrowser) {
             // Browser handles its own input
         }
-        
+
+        // Check if playback finished naturally
+        if (app.isPlaying && AudioPlaybackSound.frameCount > 0) {
+            // Check if sound stopped playing (IsSoundPlaying returns false when done)
+            if (!IsSoundPlaying(AudioPlaybackSound)) {
+                app.isPlaying = false;
+                app.playbackFinished = true;
+            }
+        }
+
         // View controls
         if (app.loaded && !app.showFileBrowser) {
             // Spectrogram area is to the right of sidebar (320px)
@@ -1137,9 +1201,17 @@ int main(int argc, char* argv[])
         // Keyboard shortcuts (SPACE for play/stop toggle, ESC for clear)
         if (IsKeyPressed(KEY_SPACE) && !app.showFileBrowser) {
             if (app.isPlaying && AudioPlaybackSound.frameCount > 0) {
+                // Currently playing - stop it
                 StopSound(AudioPlaybackSound);
                 app.isPlaying = false;
+                app.playbackFinished = false;
+            } else if (app.playbackFinished) {
+                // Playback finished naturally - restart from beginning
+                PlaySelectedRegion();
+                app.isPlaying = true;
+                app.playbackFinished = false;
             } else {
+                // Not playing and didn't just finish - start playback
                 PlaySelectedRegion();
                 app.isPlaying = true;
             }