fix: PCM copy, device name encoding, double shutdown

- playRawPcm: ma_audio_buffer_init_copy instead of ma_audio_buffer_ref (copies PCM)
- enumerateDevices: fromLocal8Bit instead of fromUtf8 for device names
- AudioRecorder: m_deviceStarted flag prevents double ma_device_uninit
- stopMicTest: delete instead of deleteLater to avoid deferred double shutdown

tools/chatgui/src/audiodevicesettingspage.cpp

@@ -214,7 +214,7 @@ void AudioDeviceSettingsPage::stopMicTest() {
     if (m_testRecorder) {
         m_testRecorder->stopRecording();
         m_testRecorder->shutdown();
-        m_testRecorder->deleteLater();
+        delete m_testRecorder;
         m_testRecorder = nullptr;
     }
     m_micTestActive = false;

tools/chatgui/src/audiorecorder.cpp

@@ -56,11 +56,13 @@ bool AudioRecorder::init() {
 }
 
 void AudioRecorder::shutdown() {
+    if (!m_initialized) return;
     if (m_recording) stopRecording();
-    if (m_device) {
-        delete m_device;
-        m_device = nullptr;
+    if (m_deviceStarted) {
+        m_deviceStarted = false;
+        if (m_device) { ma_device_stop(m_device); ma_device_uninit(m_device); }
     }
+    if (m_device) { delete m_device; m_device = nullptr; }
     m_initialized = false;
     qDebug("AudioRecorder: shutdown");
 }
@@ -113,6 +115,7 @@ void AudioRecorder::startRecording() {
     }
 
     m_recording = true;
+    m_deviceStarted = true;
     m_durationTimer.start();
     qDebug("AudioRecorder: recording started");
     emit recordingStarted();
@@ -122,8 +125,11 @@ void AudioRecorder::stopRecording() {
     if (!m_recording) return;
 
     m_durationTimer.stop();
-    ma_device_stop(m_device);
-    ma_device_uninit(m_device);
+    if (m_deviceStarted) {
+        ma_device_stop(m_device);
+        ma_device_uninit(m_device);
+        m_deviceStarted = false;
+    }
 
     m_recording = false;
     int duration = m_elapsedMs;

tools/chatgui/src/audiorecorder.h

@@ -39,6 +39,7 @@ private:
     ma_device* m_device = nullptr;
     bool m_initialized = false;
     bool m_recording = false;
+    bool m_deviceStarted = false;
     int m_sampleRate = 48000;
     int m_channels = 1;
     int m_captureDeviceIndex = -1;

tools/chatgui/src/sound_manager.cpp

@@ -143,21 +143,22 @@ ma_context* SoundManager::context() {
 void SoundManager::playRawPcm(const int16_t* pcm, int sampleCount, int sampleRate, int channels) {
     if (!m_engine || !m_initialized) return;
 
-    ma_audio_buffer_ref* ref = new ma_audio_buffer_ref;
-    ma_result r = ma_audio_buffer_ref_init(ma_format_s16, (ma_uint32)channels,
-                                            pcm, (ma_uint64)sampleCount, ref);
+    ma_audio_buffer_config bufCfg = ma_audio_buffer_config_init(
+        ma_format_s16, (ma_uint32)channels, (ma_uint64)sampleCount, pcm, NULL);
+    ma_audio_buffer* buf = new ma_audio_buffer;
+    ma_result r = ma_audio_buffer_init_copy(&bufCfg, buf);
     if (r != MA_SUCCESS) {
-        qWarning("SoundManager: audio_buffer_ref_init failed (%d)", r);
-        delete ref;
+        qWarning("SoundManager: audio_buffer_init_copy failed (%d)", r);
+        delete buf;
         return;
     }
 
     ma_sound* sound = new ma_sound;
-    r = ma_sound_init_from_data_source(m_engine, (ma_data_source*)ref, 0, nullptr, sound);
+    r = ma_sound_init_from_data_source(m_engine, (ma_data_source*)buf, 0, nullptr, sound);
     if (r != MA_SUCCESS) {
         qWarning("SoundManager: PCM sound init failed (%d)", r);
-        ma_audio_buffer_ref_uninit(ref);
-        delete ref;
+        ma_audio_buffer_uninit(buf);
+        delete buf;
         delete sound;
         return;
     }
@@ -176,7 +177,7 @@ QVector<SoundManager::DeviceInfo> SoundManager::enumeratePlaybackDevices() {
     ma_uint32 count = 0;
     if (ma_context_get_devices(ctx, &pDevices, &count, nullptr, nullptr) != MA_SUCCESS) return result;
     for (ma_uint32 i = 0; i < count; i++)
-        result.append({QString::fromUtf8(pDevices[i].name), pDevices[i].isDefault != MA_FALSE});
+        result.append({QString::fromLocal8Bit(pDevices[i].name), pDevices[i].isDefault != MA_FALSE});
     return result;
 }
 
@@ -189,6 +190,6 @@ QVector<SoundManager::DeviceInfo> SoundManager::enumerateCaptureDevices() {
     ma_uint32 count = 0;
     if (ma_context_get_devices(ctx, nullptr, nullptr, &pDevices, &count) != MA_SUCCESS) return result;
     for (ma_uint32 i = 0; i < count; i++)
-        result.append({QString::fromUtf8(pDevices[i].name), pDevices[i].isDefault != MA_FALSE});
+        result.append({QString::fromLocal8Bit(pDevices[i].name), pDevices[i].isDefault != MA_FALSE});
     return result;
 }