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

   1 // ****************************************************************************
   2 //
   3 //              CEchoGals_midi.cpp
   4 //
   5 //              Implementation file for the CEchoGals driver class (midi functions).
   6 //
   7 //              Set editor tabs to 3 for your viewing pleasure.
   8 //
   9 // ----------------------------------------------------------------------------
  10 //
  11 // This file is part of Echo Digital Audio's generic driver library.
  12 // Copyright Echo Digital Audio Corporation (c) 1998 - 2005
  13 // All rights reserved
  14 // www.echoaudio.com
  15 //
  16 // This library is free software; you can redistribute it and/or
  17 // modify it under the terms of the GNU Lesser General Public
  18 // License as published by the Free Software Foundation; either
  19 // version 2.1 of the License, or (at your option) any later version.
  20 //
  21 // This library is distributed in the hope that it will be useful,
  22 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  24 // Lesser General Public License for more details.
  25 //
  26 // You should have received a copy of the GNU Lesser General Public
  27 // License along with this library; if not, write to the Free Software
  28 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  29 //
  30 // ****************************************************************************
  31
  32 #include "CEchoGals.h"
  33
  34
  35 #ifdef MIDI_SUPPORT
  36
  37 /****************************************************************************
  38
  39         MIDI output
  40
  41  ****************************************************************************/
  42
  43 //===========================================================================
  44 //
  45 // Write a bunch of MIDI data to the MIDI output
  46 //
  47 // The DSP only buffers up 64 bytes internally for MIDI output; if you try
  48 // to send more than the DSP can handle, the actual count sent will be returned
  49 // to you.  ECHOSTATUS_BUSY is returned if the DSP is still processing the
  50 // last driver command.
  51 //
  52 //===========================================================================
  53
  54 ECHOSTATUS CEchoGals::WriteMidi
  55 (
  56         DWORD           dwExpectedCt,
  57         PBYTE           pBuffer,
  58         PDWORD  pdwActualCt
  59 )
  60 {
  61         return GetDspCommObject()->WriteMidi(   pBuffer,
  62                                                                                                                 dwExpectedCt,
  63                                                                                                                 pdwActualCt );
  64 }       // ECHOSTATUS CLayla24::WriteMidi
  65
  66
  67
  68
  69 /****************************************************************************
  70
  71         MIDI input
  72
  73  ****************************************************************************/
  74
  75
  76 //===========================================================================
  77 //
  78 //      Read a single MIDI byte from the circular MIDI input buffer
  79 //
  80 //===========================================================================
  81
  82 ECHOSTATUS CEchoGals::ReadMidiByte
  83 (
  84         ECHOGALS_MIDI_IN_CONTEXT        *pContext,
  85         DWORD                                                           &dwMidiData,
  86         LONGLONG                                                        &llTimestamp
  87 )
  88 {
  89
  90         return m_MidiIn.GetMidi(pContext,dwMidiData,llTimestamp);
  91
  92 }       // ReadMidiByte
  93
  94
  95 //===========================================================================
  96 //
  97 //      Open and enable the MIDI input
  98 //
  99 // The context struct should be set to zero before calling OpenMidiInput
 100 //
 101 //===========================================================================
 102
 103 ECHOSTATUS CEchoGals::OpenMidiInput(ECHOGALS_MIDI_IN_CONTEXT *pContext)
 104 {
 105
 106         return m_MidiIn.Arm(pContext);
 107
 108 }       // OpenMidiInput
 109
 110
 111 //===========================================================================
 112 //
 113 //      Close and disable the MIDI input
 114 //
 115 //===========================================================================
 116
 117 ECHOSTATUS CEchoGals::CloseMidiInput(ECHOGALS_MIDI_IN_CONTEXT *pContext)
 118 {
 119         return m_MidiIn.Disarm(pContext);
 120 }
 121
 122
 123 //===========================================================================
 124 //
 125 //      Reset the MIDI input, but leave it open and enabled
 126 //
 127 //===========================================================================
 128
 129 ECHOSTATUS CEchoGals::ResetMidiInput(ECHOGALS_MIDI_IN_CONTEXT *pContext)
 130 {
 131         m_MidiIn.Reset(pContext);
 132
 133         return ECHOSTATUS_OK;
 134 }
 135
 136
 137
 138 #endif // MIDI_SUPPORT
 139