fix: pause support + old message skip + stopCurrentPcm

- SoundManager: added stopCurrentPcm() for pause/stop of PCM playback
- messagedelegate: call stopCurrentPcm on pause, new play, and timer complete
- messagelist: skip old double-nested JSON messages (raw starts with '{')
- sound_manager.h: void* for ma_audio_buffer to avoid header dependency

tools/chatgui/src/sound_manager.cpp

@@ -142,34 +142,47 @@ ma_context* SoundManager::context() {
 
 void SoundManager::playRawPcm(const int16_t* pcm, int sampleCount, int sampleRate, int channels) {
     if (!m_engine || !m_initialized) {
-        qWarning("SoundManager::playRawPcm: not initialized (engine=%p init=%d)", (void*)m_engine, m_initialized);
+        DEBUG_WARN(DEBUG_CATEGORY_DEBUG, "SoundManager::playRawPcm: not initialized");
         return;
     }
-    qDebug("SoundManager::playRawPcm: %d samples %dHz %dch vol=%.2f", sampleCount, sampleRate, channels, m_volume);
+    stopCurrentPcm();
+    DEBUG_DEBUG(DEBUG_CATEGORY_DEBUG, "SoundManager::playRawPcm: %d samples %dHz %dch", sampleCount, sampleRate, channels);
 
     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;
+    m_currentPcmBuffer = buf;
     ma_result r = ma_audio_buffer_init_copy(&bufCfg, buf);
     if (r != MA_SUCCESS) {
-        qWarning("SoundManager: audio_buffer_init_copy failed (%d)", r);
-        delete buf;
+        DEBUG_WARN(DEBUG_CATEGORY_DEBUG, "SoundManager: audio_buffer_init_copy failed (%d)", r);
+        delete buf; m_currentPcmBuffer = nullptr;
         return;
     }
 
-    ma_sound* sound = new ma_sound;
-    r = ma_sound_init_from_data_source(m_engine, (ma_data_source*)buf, 0, nullptr, sound);
+    m_currentPcmSound = new ma_sound;
+    r = ma_sound_init_from_data_source(m_engine, (ma_data_source*)buf, 0, nullptr, m_currentPcmSound);
     if (r != MA_SUCCESS) {
-        qWarning("SoundManager: PCM sound init failed (%d)", r);
+        DEBUG_WARN(DEBUG_CATEGORY_DEBUG, "SoundManager: PCM sound init failed (%d)", r);
+        ma_audio_buffer_uninit(buf); delete buf; m_currentPcmBuffer = nullptr;
+        delete m_currentPcmSound; m_currentPcmSound = nullptr;
+        return;
+    }
+
+    ma_sound_set_volume(m_currentPcmSound, m_volume);
+    ma_sound_start(m_currentPcmSound);
+}
+
+void SoundManager::stopCurrentPcm() {
+    if (m_currentPcmSound) {
+        ma_sound_stop(m_currentPcmSound);
+        delete m_currentPcmSound; m_currentPcmSound = nullptr;
+    }
+    if (m_currentPcmBuffer) {
+        ma_audio_buffer* buf = (ma_audio_buffer*)m_currentPcmBuffer;
         ma_audio_buffer_uninit(buf);
         delete buf;
-        delete sound;
-        return;
+        m_currentPcmBuffer = nullptr;
     }
-
-    ma_sound_set_volume(sound, m_volume);
-    ma_sound_start(sound);
-    qDebug("SoundManager::playRawPcm: started");
 }
 
 static QString decodeDeviceName(const char* name) {