src/add-ons/kernel/drivers/audio/echo/generic/CDarla24DspCommObject.cpp

   1 // ****************************************************************************
   2 //
   3 //      CDarla24DspCommObject.cpp
   4 //
   5 //              Implementation file for Darla24 DSP interface class.
   6 //
   7 // ----------------------------------------------------------------------------
   8 //
   9 // This file is part of Echo Digital Audio's generic driver library.
  10 // Copyright Echo Digital Audio Corporation (c) 1998 - 2005
  11 // All rights reserved
  12 // www.echoaudio.com
  13 //
  14 // This library is free software; you can redistribute it and/or
  15 // modify it under the terms of the GNU Lesser General Public
  16 // License as published by the Free Software Foundation; either
  17 // version 2.1 of the License, or (at your option) any later version.
  18 //
  19 // This library is distributed in the hope that it will be useful,
  20 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  21 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  22 // Lesser General Public License for more details.
  23 //
  24 // You should have received a copy of the GNU Lesser General Public
  25 // License along with this library; if not, write to the Free Software
  26 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  27 //
  28 // ****************************************************************************
  29
  30 #include "CEchoGals.h"
  31 #include "CDarla24DspCommObject.h"
  32
  33 #include "Darla24DSP.c"
  34
  35
  36 /****************************************************************************
  37
  38         Magic constants for the Darla24 hardware
  39
  40  ****************************************************************************/
  41
  42 #define GD24_96000              0x0
  43 #define GD24_48000              0x1
  44 #define GD24_44100              0x2
  45 #define GD24_32000              0x3
  46 #define GD24_22050              0x4
  47 #define GD24_16000              0x5
  48 #define GD24_11025              0x6
  49 #define GD24_8000                       0x7
  50 #define GD24_88200              0x8
  51 #define GD24_EXT_SYNC   0x9
  52
  53
  54
  55
  56 /****************************************************************************
  57
  58         Construction and destruction
  59
  60  ****************************************************************************/
  61
  62 //===========================================================================
  63 //
  64 // Constructor
  65 //
  66 //===========================================================================
  67
  68 CDarla24DspCommObject::CDarla24DspCommObject
  69 (
  70         PDWORD          pdwRegBase,                             // Virtual ptr to DSP registers
  71         PCOsSupport     pOsSupport
  72 ) : CGdDspCommObject( pdwRegBase, pOsSupport )
  73 {
  74         strcpy( m_szCardName, "Darla24" );
  75         m_pdwDspRegBase = pdwRegBase;           // Virtual addr DSP's register base
  76
  77         m_wNumPipesOut = 8;
  78         m_wNumPipesIn = 2;
  79         m_wNumBussesOut = 8;
  80         m_wNumBussesIn = 2;
  81         m_wFirstDigitalBusOut = 8;
  82         m_wFirstDigitalBusIn = 2;
  83
  84         m_fHasVmixer = FALSE;
  85
  86         m_wNumMidiOut = 0;                                      // # MIDI out channels
  87         m_wNumMidiIn = 0;                                               // # MIDI in  channels
  88         m_pDspCommPage->dwSampleRate = SWAP( (DWORD) 44100 );
  89                                                                                                 // Need this in case we start with ESYNC
  90
  91         m_pwDspCodeToLoad = pwDarla24DSP;
  92
  93         //
  94         // Since this card has no ASIC, mark it as loaded so everything works OK
  95         //
  96         m_bASICLoaded = TRUE;
  97
  98 }       // CDarla24DspCommObject::CDarla24DspCommObject( DWORD dwPhysRegBase )
  99
 100
 101 //===========================================================================
 102 //
 103 // Destructor
 104 //
 105 //===========================================================================
 106
 107 CDarla24DspCommObject::~CDarla24DspCommObject()
 108 {
 109 }       // CDarla24DspCommObject::~CDarla24DspCommObject()
 110
 111
 112
 113
 114 /****************************************************************************
 115
 116         Hardware config
 117
 118  ****************************************************************************/
 119
 120 //===========================================================================
 121 //
 122 // SetSampleRate
 123 //
 124 // Set the audio sample rate for Darla24; this is fairly simple.  You
 125 // just pick the right magic number.
 126 //
 127 //===========================================================================
 128
 129 DWORD CDarla24DspCommObject::SetSampleRate( DWORD dwNewSampleRate )
 130 {
 131         BYTE    bClock;
 132
 133         //
 134         // Pick the magic number
 135         //
 136         switch ( dwNewSampleRate )
 137         {
 138                 case 96000 :
 139                         bClock = GD24_96000;
 140                         break;
 141                 case 88200 :
 142                         bClock = GD24_88200;
 143                         break;
 144                 case 48000 :
 145                         bClock = GD24_48000;
 146                         break;
 147                 case 44100 :
 148                         bClock = GD24_44100;
 149                         break;
 150                 case 32000 :
 151                         bClock = GD24_32000;
 152                         break;
 153                 case 22050 :
 154                         bClock = GD24_22050;
 155                         break;
 156                 case 16000 :
 157                         bClock = GD24_16000;
 158                         break;
 159                 case 11025 :
 160                         bClock = GD24_11025;
 161                         break;
 162                 case 8000 :
 163                         bClock = GD24_8000;
 164                         break;
 165                 default :
 166                         ECHO_DEBUGPRINTF( ("CDarla24DspCommObject::SetSampleRate: Error, "
 167                                                                          "invalid sample rate 0x%lx\n", dwNewSampleRate) );
 168                         return 0xffffffff;
 169         }
 170
 171         if ( !WaitForHandshake() )
 172                 return 0xffffffff;
 173
 174         //
 175         // Override the sample rate if this card is set to Echo sync.
 176         // m_pDspCommPage->wInputClock is just being used as a parameter here;
 177         // the DSP ignores it.
 178         //
 179         if ( ECHO_CLOCK_ESYNC == GetInputClock() )
 180                 bClock = GD24_EXT_SYNC;
 181
 182         m_pDspCommPage->dwSampleRate = SWAP( dwNewSampleRate );
 183
 184         //
 185         // Write the audio state to the comm page
 186         //
 187         m_pDspCommPage->byGDClockState = bClock;
 188
 189         // Send command to DSP
 190         ClearHandshake();
 191         SendVector( DSP_VC_SET_GD_AUDIO_STATE );
 192
 193         ECHO_DEBUGPRINTF( ("CDarla24DspCommObject::SetSampleRate: 0x%lx "
 194                                                          "clock %d\n", dwNewSampleRate, bClock) );
 195
 196         return GetSampleRate();
 197
 198 } // DWORD CDarla24DspCommObject::SetSampleRate( DWORD dwNewSampleRate )
 199
 200
 201 //===========================================================================
 202 //
 203 // Set input clock
 204 //
 205 // Darla24 supports internal and Esync clock.
 206 //
 207 //===========================================================================
 208
 209 ECHOSTATUS CDarla24DspCommObject::SetInputClock(WORD wClock)
 210 {
 211         if (    (ECHO_CLOCK_INTERNAL != wClock) &&
 212                         (ECHO_CLOCK_ESYNC != wClock))
 213                 return ECHOSTATUS_CLOCK_NOT_SUPPORTED;
 214
 215         m_wInputClock = wClock;
 216
 217         return SetSampleRate( GetSampleRate() );
 218
 219 }       // SetInputClock
 220
 221
 222 // **** Darla24DspCommObject.cpp ****