[fix] fix alsa audio cap

Author: LittleMouse

projects/llm_framework/main_audio/src/alsa_audio.c

@@ -11,6 +11,7 @@ static int gcapLoopExit = 0;
 void alsa_cap_start(unsigned int card, unsigned int device, float Volume, int channel, int rate, int bit,
                     AUDIOCallback callback)
 {
+    gcapLoopExit = 0;
     struct pcm_config config;
     unsigned int pcm_open_flags;
     struct pcm *pcm;
@@ -23,7 +24,7 @@ void alsa_cap_start(unsigned int card, unsigned int device, float Volume, int ch
     memset(&config, 0, sizeof(config));
     config.channels          = channel;
     config.rate              = 48000;  // TODO: 部分USB MIC仅支持48k，暂时固定采集为48k
-    config.period_size       = 512;
+    config.period_size       = 120;
     config.period_count      = 4;
     config.format            = PCM_FORMAT_S16_LE;
     config.start_threshold   = 0;
@@ -123,6 +124,7 @@ void alsa_cap_start(unsigned int card, unsigned int device, float Volume, int ch
     }
     free(buffer);
     pcm_close(pcm);
+    printf("Total frames captured: %u\n", total_frames_read);
 }
 
 void alsa_close_cap()

projects/llm_framework/main_audio/src/main.cpp

@@ -105,7 +105,12 @@ class llm_audio : public StackFlow {
 
     void _cap_stop()
     {
+#if (defined(CONFIG_AX_620E_MSP_ENABLED) || defined(CONFIG_AX_620Q_MSP_ENABLED)) && !defined(CONFIG_AXCL_ENABLED)
         ax_close_cap();
+
+#else
+        alsa_close_cap();
+#endif
         if (audio_cap_thread_) {
             audio_cap_thread_->join();
             audio_cap_thread_.reset();