// ****************************************************************************//// 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::QueryAudioSampleRatevoid CDarla::QuerySampleRateRange(DWORD &dwMinRate,DWORD &dwMaxRate){dwMinRate = 44100;dwMaxRate = 48000;}// *** CDarla.cpp ***