// ****************************************************************************
//
//              CDarla.cpp
//
//              Implementation file for the CDarla driver class; this supports 20 bit
//              Darla, not Darla24.
//
//              Set editor tabs to 3 for your viewing pleasure.
//
// ----------------------------------------------------------------------------
//
// This file is part of Echo Digital Audio's generic driver library.
// Copyright Echo Digital Audio Corporation (c) 1998 - 2005
// All rights reserved
// www.echoaudio.com
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// ****************************************************************************

#include "CDarla.h"

#define DARLA20_ANALOG_OUTPUT_LATENCY   137
#define DARLA20_ANALOG_INPUT_LATENCY    240


/****************************************************************************

        Construction and destruction

 ****************************************************************************/

//===========================================================================
//
// Overload new & delete so memory for this object is allocated
//      from non-paged memory.
//
//===========================================================================

PVOID CDarla::operator new( size_t Size )
{
        PVOID           pMemory;
        ECHOSTATUS      Status;
        
        Status = OsAllocateNonPaged(Size,&pMemory);
        
        if ( (ECHOSTATUS_OK != Status) || (NULL == pMemory ))
        {
                ECHO_DEBUGPRINTF(("CDarla::operator new - memory allocation failed\n"));

                pMemory = NULL;
        }
        else
        {
                memset( pMemory, 0, Size );
        }

        return pMemory;

}       // PVOID CDarla::operator new( size_t Size )


VOID  CDarla::operator delete( PVOID pVoid )
{
        if ( ECHOSTATUS_OK != OsFreeNonPaged( pVoid ) )
        {
                ECHO_DEBUGPRINTF(("CDarla::operator delete memory free failed\n"));
        }
}       // VOID  CDarla::operator delete( PVOID pVoid )


//===========================================================================
//
// Constructor and destructor
//
//===========================================================================

CDarla::CDarla( PCOsSupport pOsSupport )
                : CEchoGals( pOsSupport )
{
        ECHO_DEBUGPRINTF( ( "CDarla::CDarla() is born!\n" ) );
        
        m_wAnalogOutputLatency = DARLA20_ANALOG_OUTPUT_LATENCY;
        m_wAnalogInputLatency = DARLA20_ANALOG_INPUT_LATENCY;
}

CDarla::~CDarla()
{
        ECHO_DEBUGPRINTF( ( "CDarla::~CDarla() is toast!\n" ) );
}




/****************************************************************************

        Setup and hardware initialization

 ****************************************************************************/

//===========================================================================
//
// Every card has an InitHw method
//
//===========================================================================

ECHOSTATUS CDarla::InitHw()
{
        ECHOSTATUS      Status;
        
        //
        // Call the base InitHw method
        //
        if ( ECHOSTATUS_OK != ( Status = CEchoGals::InitHw() ) )
                return Status;

        //
        // Create the DSP comm object 
        //
        ECHO_ASSERT(NULL == m_pDspCommObject );
        m_pDspCommObject = new CDarlaDspCommObject( (PDWORD) m_pvSharedMemory,
                                                                                                                                m_pOsSupport );
        if (NULL == m_pDspCommObject)
        {
                ECHO_DEBUGPRINTF(("CDarla::InitHw - could not create DSP comm object\n"));
                return ECHOSTATUS_NO_MEM;
        }
        
        //
        // Load the DSP
        //
        GetDspCommObject()->LoadFirmware();
        if ( GetDspCommObject()->IsBoardBad() )
                return ECHOSTATUS_DSP_DEAD;
        
        //
        // Clear the "bad board" flag
        //
        m_wFlags &= ~ECHOGALS_FLAG_BADBOARD;
        
        //
        //      Must call this here *after* DSP is init
        //
        Status = InitLineLevels();
        
        //
        //      Get default sample rate from DSP
        //
        m_dwSampleRate = GetDspCommObject()->GetSampleRate();
        
        ECHO_DEBUGPRINTF( ( "CDarla::InitHw()\n" ) );
        
        return Status;
        
}       // ECHOSTATUS CDarla::InitHw()




/****************************************************************************

        Informational methods

 ****************************************************************************/

//===========================================================================
//
// QueryAudioSampleRate is used to find out if this card can handle a 
// given sample rate.
//
//===========================================================================

ECHOSTATUS CDarla::QueryAudioSampleRate
(
        DWORD           dwSampleRate
)
{
        if ( dwSampleRate != 44100 &&
                  dwSampleRate != 48000 )
        {
                ECHO_DEBUGPRINTF(
                        ("CDarla::QueryAudioSampleRate() - rate %ld invalid\n",
                                dwSampleRate));
                return ECHOSTATUS_BAD_FORMAT;
        }
        
        ECHO_DEBUGPRINTF( ( "CDarla::QueryAudioSampleRate()\n" ) );
        return ECHOSTATUS_OK;

}       // ECHOSTATUS CDarla::QueryAudioSampleRate


void CDarla::QuerySampleRateRange(DWORD &dwMinRate,DWORD &dwMaxRate)
{
        dwMinRate = 44100;
        dwMaxRate = 48000;
}



// *** CDarla.cpp ***