求助，关于USB AUDIO设置采样率遇到的问题求解

试一下在传输完成中断的地方修改传输长度


      current_speaker->data_size = current_speaker->injection_size;
      read_length = current_speaker->packet_length;
#if USB_AUDIO_CONFIG_PLAY_USE_FREQ_44_1_K
      if(current_speaker->node.audio_description->frequence == USB_AUDIO_CONFIG_FREQ_44_1_K)
      {
        if(current_speaker->injection_44_count < 9)
        {
          current_speaker->injection_44_count++;  
        }
        else
        {
           current_speaker->injection_44_count = 0;
           current_speaker->data_size = current_speaker->alt_buf_half_size;
           read_length = current_speaker->packet_length_max_44_1;
        }
      }
#endif /* USB_AUDIO_CONFIG_PLAY_USE_FREQ_44_1_K*/