audio_7496.c

车载 液晶显示器的主控程序（主要使用芯片为 MYSON MTV512 单片机、RealTek 2323 Scare 芯片、TVP5147（视频解码）。配Sharp 8寸液晶显示器 ）。

//x.hu, for audio 


#include "..\Header\Include.h"
#if (_CUSTOM_TYPE == _CUSTOM_HAOZHEN)
#if (_AUDIO_DEVICE != _AUDIO_NONE || _FM_MODULATION == _ENABLE)
void CAudioSelChannel(BYTE audioChannel)
{
	if (audioChannel == _AUDIO_CHANNEL_AV1) {
		b4052A = 1;	//sel ch1
		b4052B = 0;
	}
	else if (audioChannel == _AUDIO_CHANNEL_AV2) {
		b4052A = 0;	//sel ch0
		b4052B = 0;
	}
	else {
		b4052A = 1;	//sel ch3
		b4052B = 1;
	}
}
#if (_AUDIO_DEVICE != _AUDIO_NONE)

#if (_AUDIO_DEVICE == _AUDIO_7496)

void CAdjustVolume(void)
{
	//x.hu, 20050803, add
	if (ucCurrState != _ACTIVE_STATE) {
		CAudioSelChannel(_AUDIO_CHANNEL_NC);
		return;
	}
	
	if ((stAudioData.audioFlag & _BIT7) == 0) {
		if (GET_INPUTPORT_TYPE(stSystemData.InputSource) == _VIDEO_AV_PORT) {
			CAudioSelChannel(_AUDIO_CHANNEL_AV1);
		}
		else if (GET_INPUTPORT_TYPE(stSystemData.InputSource) == _VIDEO_AV2_PORT) {
			CAudioSelChannel(_AUDIO_CHANNEL_AV2);
		}
		else{
			CAudioSelChannel(_AUDIO_CHANNEL_NC);
		}
	}
	
	VOLUME_PORT = stOsdUserData.Volume;
}

#endif	//end of #if (_AUDIO_TYPE == _AUDIO_7496)
#endif	//end of #if (_AUDIO_DEVICE != _AUDIO_NONE)
#endif	//end of #if (_AUDIO_DEVICE != _AUDIO_NONE || _FM_MODULATION == _ENABLE)
#endif	//end of #if (_CUSTOM_TYPE == _CUSTOM_HAOZHEN)

#if (_CUSTOM_TYPE == _CUSTOM_NONE)
#if (_AUDIO_DEVICE != _AUDIO_NONE)
void CAudioSelChannel(BYTE audioChannel)
{
   #if(_AUDIO_DEVICE == _AUDIO_7496)
	if (audioChannel == _AUDIO_CHANNEL_AV1) 
	{
		b4052A =0 ;//b4052A = 1;	//sel ch1
		b4052B= 0;//b4052B = 0;
	}
	else if (audioChannel == _AUDIO_CHANNEL_AV2) {
		b4052A = 0;	//sel ch0
		b4052B = 1;
	}
	/*
	else  if (audioChannel == _AUDIO_){
		b4052A = 1;//b4052A = 1;	//sel ch3
		b4052B= 0;//b4052B = 1;
	}
	*/
	else{
              b4052A = 0;//b4052A = 1;	//sel ch3
		b4052B= 0;//b4052B = 1;  
	}
   #elif(_AUDIO_DEVICE == _AUDIO_NONE)
      if (audioChannel == _AUDIO_CHANNEL_AV1) 
	{
		b4052A = 0;//b4052A = 1;	//sel ch1
		b4052A = 0;//b4052B = 0;
	}
	else if (audioChannel == _AUDIO_CHANNEL_AV2) {
		b4052A = 0;	//sel ch0
		b4052B = 0;
	}
	else {
		b4052A = 1;//b4052A = 1;	//sel ch3
		b4052A = 1;//b4052B = 1;
	}
   #endif
}
#if (_AUDIO_DEVICE == _AUDIO_7496)

void CAdjustVolume(void)
{
	//x.hu, 20050803, add
	if (ucCurrState != _ACTIVE_STATE) {
		CAudioSelChannel(_AUDIO_CHANNEL_NC);
		return;
	}
	
	if ((stAudioData.audioFlag & _BIT7) == 0) {
		if (GET_INPUTPORT_TYPE(stSystemData.InputSource) == _VIDEO_AV_PORT) {
			CAudioSelChannel(_AUDIO_CHANNEL_AV1);
		}
		else if (GET_INPUTPORT_TYPE(stSystemData.InputSource) == _VIDEO_AV2_PORT) {
			CAudioSelChannel(_AUDIO_CHANNEL_AV2);
		}
		else{
			CAudioSelChannel(_AUDIO_CHANNEL_NC);
		}
	}
	
	VOLUME_PORT = 255-stOsdUserData.Volume;
}

void CAudioVolumemute(void)
  {
            b4052A =1 ;//b4052A = 1;	//sel ch1
		b4052B= 0;//b4052B = 0;
		VOLUME_PORT=255;

    }

#endif	//end of #if (_AUDIO_TYPE == _AUDIO_7496)
#endif	//end of #if (_AUDIO_DEVICE != _AUDIO_NONE)
#endif	//end of #if (_CUSTOM_TYPE == _CUSTOM_NONE)