headset_volume.c

针对bluelab3.42的handsfree车载蓝牙的参考

/****************************************************************************
Copyright (C) Cambridge Silicon Radio Ltd. 2004-2006
Part of BlueLab 3.4.2-release

FILE NAME
    headset_volume.c        

DESCRIPTION
    Controls the volume of the headset.

*/


/****************************************************************************
    Header files
*/
#include "headset_private.h"
#include "av_stream_control.h"
#include "cvc_headset.h"
#include "headset_tones.h"
#include "headset_volume.h"

#include <codec.h>
#include <panic.h>
#include <pcm.h>
#include <pio.h>
#include <ps.h>
#include <stdlib.h>
#include <string.h>

#define VOLUME_MIC_UNMUTE_DELAY_MS 100
#define APP_MUTE_REMINDER_TIME_INT 5000
#ifdef DEBUG_VOLUME
#define VOLUME_DEBUG(x) DEBUG(x)
#else
#define VOLUME_DEBUG(x) 
#endif


static const uint8 vgsToCodecGain[16] = {0, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 17, 19};

static void playVolLimitTone(headsetTaskData* app)
{
    headsetPlayTone(app, tone_type_vol_limit);
}


/**************************************************************************/
void initialiseVolume(headsetTaskData* app)
{
    /* Read the volume from PS. The volume is stored as:
    
      HF Volume     |    AV volume  
      ---------------------------------
      |15| | | | | | |8|7| | | | | | |0|
      ---------------------------------
    */
    if (!PsRetrieve(VOLUME_LEVEL, &app->speaker_volume, sizeof(app->speaker_volume)))
    {
        /* set the headset gain to a reasonable value */
        app->speaker_volume.hfp_volume = 0x0A;
        app->speaker_volume.av_volume = 0x0A;
    }
    
    headsetUpdateVolume(app->codec_task, app->speaker_volume.hfp_volume); 
}


/**************************************************************************/
void headsetHandleAvVolUp(headsetTaskData* app)
{
    if (app->speaker_volume.av_volume < 15)
    {
        app->speaker_volume.av_volume++;
        if (app->pcm_audio_state == pcm_av)
            headsetUpdateVolume(app->codec_task, app->speaker_volume.av_volume);
    }
    else
    {
        playVolLimitTone(app);
    }
}


/**************************************************************************/
void headsetHandleAvVolDown(headsetTaskData* app)
{
    if (app->speaker_volume.av_volume > 0)
    {
        app->speaker_volume.av_volume--;
        if (app->pcm_audio_state == pcm_av)
            headsetUpdateVolume(app->codec_task, app->speaker_volume.av_volume);
    }
    else
    {
        playVolLimitTone(app);
    }
}


/**************************************************************************/
void headsetHandleHfVolUp(headsetTaskData* app)
{
    if (app->speaker_volume.hfp_volume < 15)
    {
        app->speaker_volume.hfp_volume++;
#ifdef INCLUDE_CVC
		CvcHeadsetVolume(app);
#else
        if (app->pcm_audio_state == pcm_sco)
            headsetUpdateVolume(app->codec_task, app->speaker_volume.hfp_volume);
#endif
    }
    else
    {
        playVolLimitTone(app);
    }
}


/**************************************************************************/
void headsetHandleHfVolDown(headsetTaskData* app)
{
    if (app->speaker_volume.hfp_volume > 0)
    {
        app->speaker_volume.hfp_volume--;
#ifdef INCLUDE_CVC
		CvcHeadsetVolume(app);
#else
        if (app->pcm_audio_state == pcm_sco)
            headsetUpdateVolume(app->codec_task, app->speaker_volume.hfp_volume);
#endif
    }
    else
    {
        playVolLimitTone(app);
    }
}


/**************************************************************************/
void headsetUpdateVolume(Task codec_task, uint8 gain)
{
    if (gain <= 15)
        CodecSetOutputGainNow(codec_task, vgsToCodecGain[gain], left_and_right_ch);
    VOLUME_DEBUG(("VOLUME: New volume: %d\n",gain));
}
/***************************************************************************/
void headsetMicrophoneMuteToggle(headsetTaskData *app)
{
	if(app->mic_mute_on)
	{
		headsetMicrophoneMuteOff(app);
	}
	else
	{
		headsetMicrophoneMuteOn(app);
	}
}
/***************************************************************************/
void headsetMicrophoneMuteOn(headsetTaskData *app)
{
    if ((app->hfp_state == headsetActiveCall) && app->sco_sink)
    {
       VOLUME_DEBUG(("VOLUME: Mic mute on\n"));
	   app->mic_mute_on = 1;
#ifndef INCLUDE_CVC
       /* Disconnect the microphone */
	   StreamDisconnect(StreamPcmSource(0), 0);
	   StreamDisconnect(StreamPcmSource(1), 0); 
       /* Set volume at minimum */
	   headsetVolumeSetMicLevel (app , 0 ) ;
#else
       CvcSetMode(app);
#endif
       /* Start mute reminder operation */
	   MessageSendLater( &app->task , APP_MUTE_REMINDER , 0 , 1000) ;
    }
}

/***************************************************************************/
void headsetMicrophoneMuteOff(headsetTaskData *app)
{
    if ((app->hfp_state == headsetActiveCall) && app->sco_sink)
    {
       VOLUME_DEBUG(("VOLUME: Mic mute off\n"));
	   app->mic_mute_on = 0;
	   MessageCancelAll( &app->task , APP_MUTE_REMINDER) ;
       /* Reconnect the microphone */
#ifndef INCLUDE_CVC
       headsetVolumeSetMicLevel (app , 0 ) ;
	   (void)StreamConnect(StreamPcmSource(0), app->sco_sink);
#else
       CvcSetMode(app);
#endif
       /* Send a message to complete the unmute a short time later */
	   MessageSendLater ( &app->task , APP_UNMUTE_MIC , 0 , VOLUME_MIC_UNMUTE_DELAY_MS ) ;
   }
}

/***************************************************************************/
void headsetVolumeSetMicLevel (headsetTaskData *app , uint16 micGain) 
{
    
#ifndef INCLUDE_CVC
    uint16 codecVal = 0;
   
    /*scale the codec gain accordingly*/
    codecVal = vgsToCodecGain[micGain] ;

    if (app->profile_connected == hfp_handsfree_profile)
    {
        HfpSendMicrophoneVolume(app->hfp , micGain);
    }
    else
    {   
        HfpSendMicrophoneVolume(app->hsp , micGain);
    }

    /*set the mic gain as requested*/
    CodecSetInputGainNow(app->codec_task, codecVal, left_and_right_ch);
#endif    
    
}

/****************************************************************************
NAME 
    headsetVolumeCompleteUnmuteMicrophone

DESCRIPTION
    method to complete the unmute action - ramps the vol up to the desired level
    This should occur after the delay between setting the mic bias and beginning the
    mic gain increase

RETURNS

*/
void headsetVolumeCompleteUnmuteMicrophone (headsetTaskData *app)
{
    
#ifndef INCLUDE_CVC
    uint16 micLevel = app->mic_volume;
    uint16 rampLevel = 0 ;    
    
/*4. Ramp up the microphone gain from 1 to the desired value*/
    for ( rampLevel = 1; rampLevel < (micLevel+1) ; rampLevel++)
    {
        headsetVolumeSetMicLevel ( app ,rampLevel ) ;
    }
#endif
    
}
	

/********************************************************************************
NAME 
    VolumeMuteRemind

DESCRIPTION
    Plays a beep every 5 seconds to indicate that the Mute button has been pressed

RETURNS  
*/
void VolumeMuteRemind (headsetTaskData *app)
{
	MessageSendLater( &app->task , APP_MUTE_REMINDER , 0 , APP_MUTE_REMINDER_TIME_INT) ;
}