/*
+-----------------------------------------------------------------------------
|  Project :  GSM-PS (6147)
|  Modul   :  AOC
+-----------------------------------------------------------------------------
|  Copyright 2002 Texas Instruments Berlin, AG
|                 All rights reserved.
|
|                 This file is confidential and a trade secret of Texas
|                 Instruments Berlin, AG
|                 The receipt of or possession of this file does not convey
|                 any rights to reproduce or disclose its contents or to
|                 manufacture, use, or sell anything it may describe, in
|                 whole, or in part, without the specific written consent of
|                 Texas Instruments Berlin, AG.
+-----------------------------------------------------------------------------
|  Purpose :  This module defines the functions for the high level audio 
              driver interface.
+-----------------------------------------------------------------------------
*/


#ifndef HL_AUDIO_DRV_C
#define HL_AUDIO_DRV_C
#endif

#include "aci_all.h"
#include "aci_cmh.h"
#include "aci.h"
#include "psa.h"
#include "hl_audio_drv.h"
#include "rv/rv_general.h"
#include "audio/audio_api.h"
#include "fc-target.h"


/* ===============GLOBAL VARIABLES====================*/

LOCAL  T_HL_VOCODER_STATE currVocoderState;

#ifdef CONFIG_MCSI_MODEM
GLOBAL UBYTE aci_digital_voice_autoswitch;
#endif


/* =============FUNCTION DEFINITIONS FOR L1===========*/
#ifdef VOCODER_FUNC_INTERFACE
void vocoder_mute_dl( BOOL mute );
void vocoder_mute_ul( BOOL mute );
void enable_tch_vocoder (BOOL vocoder_on);
#endif /* VOCODER_FUNC_INTERFACE */


/*================= FUNCTIONS ========================*/

/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)         MODULE  : HL_AUDIO_DRV            |
|                                 ROUTINE : hl_audio_drv_init       |
+-------------------------------------------------------------------+

  PURPOSE : This function is called to initialise the variables in 
            the High Level Audio driver
*/
GLOBAL void hl_audio_drv_init (void)
{
  TRACE_FUNCTION("hl_audio_drv_init()");

  currVocoderState = HL_VOCODER_DISABLED;
}

#ifdef CONFIG_MCSI_MODEM
static void audio_mode_callback(void *event_from_audio)
{
	/* do nothing at this time */
}
#endif

/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)         MODULE  : PSA_CCF                 |
|                                 ROUTINE : hl_drv_set_vocoder_state|
+-------------------------------------------------------------------+

  PURPOSE : This function will enable or disable vocoder as needed,
            and possibly also enable/disable the MCSI digital voice
            path if running on a FreeCalypso modem in the digital
            voice interface configuration.
*/
GLOBAL void hl_drv_set_vocoder_state(BOOL user_attach)
{
#ifdef CONFIG_MCSI_MODEM
  T_AUDIO_VOICE_PATH_SETTING vpath;
  T_AUDIO_FULL_ACCESS_WRITE audio_param;
  T_RV_RETURN return_path;
#endif

  TRACE_FUNCTION("hl_drv_set_vocoder_state");

  if ( (user_attach EQ TRUE AND currVocoderState EQ HL_VOCODER_ENABLED) OR
       (user_attach EQ FALSE AND currVocoderState EQ HL_VOCODER_DISABLED) )
    return; /* No state change requested */

  if (user_attach)
  {
    enable_tch_vocoder(TRUE);
    vocoder_mute_dl (FALSE);      /* un-mute speaker    */
    vocoder_mute_ul (FALSE);      /* un-mute microphone */
  #ifdef CONFIG_MCSI_MODEM
    if (aci_digital_voice_autoswitch)
    {
      vpath = AUDIO_BLUETOOTH_HEADSET;
      audio_param.variable_indentifier = AUDIO_PATH_USED;
      audio_param.data = &vpath;
      return_path.addr_id       = NULL;
      return_path.callback_func = audio_mode_callback;
      audio_full_access_write(&audio_param, return_path);
    }
  #endif
    currVocoderState = HL_VOCODER_ENABLED;
  }
  else
  {
    vocoder_mute_dl (TRUE);       /* mute speaker    */
    vocoder_mute_ul (TRUE);       /* mute microphone */
    enable_tch_vocoder (FALSE);   /* disable vocoder */
  #ifdef CONFIG_MCSI_MODEM
    if (aci_digital_voice_autoswitch)
    {
      vpath = AUDIO_GSM_VOICE_PATH;
      audio_param.variable_indentifier = AUDIO_PATH_USED;
      audio_param.data = &vpath;
      return_path.addr_id       = NULL;
      return_path.callback_func = audio_mode_callback;
      audio_full_access_write(&audio_param, return_path);
    }
  #endif
    currVocoderState = HL_VOCODER_DISABLED;
  }

  return;
}

/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)        MODULE  : HL_AUDIO_DRV             |
|                                ROUTINE : hl_drv_get_vocoder_state |
+-------------------------------------------------------------------+

  PURPOSE : This function returns the state of the vocoder
*/

GLOBAL T_HL_VOCODER_STATE hl_drv_get_vocoder_state (void)
{
  return currVocoderState;
}

#ifndef VOCODER_FUNC_INTERFACE
/*
+-------------------------------------------------------------------+
| PROJECT : GSM-PS (6147)        MODULE  : HL_AUDIO_DRV             |
|                                ROUTINE : hl_drv_vocoder_enabled   |
+-------------------------------------------------------------------+

  PURPOSE : Currently this function does nothing
*/

GLOBAL void hl_drv_vocoder_state_set (void)
{
  TRACE_FUNCTION("hl_drv_vocoder_enabled()");

  switch(currVocoderState)
  {
  case HL_VOCODER_ENABLE_INITIATED:
    currVocoderState = HL_VOCODER_ENABLED;
    break;

  case HL_VOCODER_DISABLE_INITIATED:
    currVocoderState = HL_VOCODER_DISABLED;
    break;

  default:
    break;

  }
}
#endif