src/ptlib/unix/dummyvideo.cxx

   1 /*
   2  * dummyvideo.cxx
   3  *
   4  * Classes to support streaming video input (grabbing) and output.
   5  *
   6  * Portable Windows Library
   7  *
   8  * Copyright (c) 1993-2001 Equivalence Pty. Ltd.
   9  *
  10  * The contents of this file are subject to the Mozilla Public License
  11  * Version 1.0 (the "License"); you may not use this file except in
  12  * compliance with the License. You may obtain a copy of the License at
  13  * http://www.mozilla.org/MPL/
  14  *
  15  * Software distributed under the License is distributed on an "AS IS"
  16  * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
  17  * the License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * The Original Code is Portable Windows Library.
  21  *
  22  * The Initial Developer of the Original Code is Equivalence Pty. Ltd.
  23  *
  24  * Contributor(s): Roger Hardiman <roger@freebsd.org>
  25  *
  26  * $Log$
  27  * Revision 1.8  2004/01/02 23:30:18  rjongbloed
  28  * Removed extraneous static function for getting input device names that has been deprecated during the plug ins addition.
  29  *
  30  * Revision 1.7  2002/04/10 08:40:36  rogerh
  31  * Simplify the SetVideoChannelFormat() code. Use the implementation in the
  32  * ancestor class.
  33  *
  34  * Revision 1.6  2002/04/05 06:41:54  rogerh
  35  * Apply video changes from Damien Sandras <dsandras@seconix.com>.
  36  * The Video Channel and Format are no longer set in Open(). Instead
  37  * call the new SetVideoChannelFormat() method. This makes video capture
  38  * and GnomeMeeting more stable with certain Linux video capture devices.
  39  *
  40  * Revision 1.5  2002/01/14 11:52:44  rogerh
  41  * Add TestAllFormats
  42  *
  43  * Revision 1.4  2001/12/05 08:34:41  rogerh
  44  * Add more dummy functions
  45  *
  46  * Revision 1.3  2001/09/24 09:11:07  rogerh
  47  * Add dummy methods, submitted by Andreas Wrede <awrede@mac.com>
  48  *
  49  * Revision 1.2  2001/06/27 17:43:32  rogerh
  50  * MakeOpen to return FALSE. Also change every things else to return failure.
  51  *
  52  * Revision 1.1  2001/06/27 17:27:23  rogerh
  53  * Dummy video allows code dependent on PVideoInputDevice to compile and link.
  54  * It has no functionality.
  55  *
  56  */
  57
  58 #pragma implementation "videoio.h"
  59
  60 #include <ptlib.h>
  61 #include <ptlib/videoio.h>
  62 #include <ptlib/vfakeio.h>
  63 #include <ptlib/vconvert.h>
  64
  65 ///////////////////////////////////////////////////////////////////////////////
  66 // PVideoInputDevice
  67
  68 PVideoInputDevice::PVideoInputDevice()
  69 {
  70 }
  71
  72
  73 BOOL PVideoInputDevice::Open(const PString & devName, BOOL startImmediate)
  74 {
  75   return FALSE;
  76 }
  77
  78
  79 BOOL PVideoInputDevice::IsOpen()
  80 {
  81   return FALSE;
  82 }
  83
  84
  85 BOOL PVideoInputDevice::Close()
  86 {
  87   return FALSE;
  88 }
  89
  90
  91 BOOL PVideoInputDevice::Start()
  92 {
  93   return FALSE;
  94 }
  95
  96
  97 BOOL PVideoInputDevice::Stop()
  98 {
  99   return FALSE;
 100 }
 101
 102
 103 BOOL PVideoInputDevice::IsCapturing()
 104 {
 105   return FALSE;
 106 }
 107
 108
 109 BOOL PVideoInputDevice::SetVideoFormat(VideoFormat newFormat)
 110 {
 111   return FALSE;
 112 }
 113
 114
 115 int PVideoInputDevice::GetBrightness()
 116 {
 117   return -1;
 118 }
 119
 120
 121 BOOL PVideoInputDevice::SetBrightness(unsigned newBrightness)
 122 {
 123   return FALSE;
 124 }
 125
 126
 127 int PVideoInputDevice::GetHue()
 128 {
 129   return -1;
 130 }
 131
 132
 133 BOOL PVideoInputDevice::SetHue(unsigned newHue)
 134 {
 135   return FALSE;
 136 }
 137
 138
 139 int PVideoInputDevice::GetContrast()
 140 {
 141   return -1;
 142 }
 143
 144
 145 BOOL PVideoInputDevice::SetContrast(unsigned newContrast)
 146 {
 147   return FALSE;
 148 }
 149
 150
 151 BOOL PVideoInputDevice::GetParameters (int *whiteness, int *brightness,
 152                                        int *colour, int *contrast, int *hue)
 153 {
 154   return FALSE;
 155 }
 156
 157
 158 int PVideoInputDevice::GetNumChannels()
 159 {
 160   return 0;
 161 }
 162
 163
 164 BOOL PVideoInputDevice::SetChannel(int newChannel)
 165 {
 166   return FALSE;
 167 }
 168
 169
 170 BOOL PVideoInputDevice::SetColourFormat(const PString & newFormat)
 171 {
 172   return FALSE;
 173 }
 174
 175
 176 BOOL PVideoInputDevice::SetFrameRate(unsigned rate)
 177 {
 178   return FALSE;
 179 }
 180
 181
 182 BOOL PVideoInputDevice::GetFrameSizeLimits(unsigned & minWidth,
 183                                            unsigned & minHeight,
 184                                            unsigned & maxWidth,
 185                                            unsigned & maxHeight)
 186 {
 187   return FALSE;
 188 }
 189
 190
 191 BOOL PVideoInputDevice::SetFrameSize(unsigned width, unsigned height)
 192 {
 193   return FALSE;
 194 }
 195
 196
 197 PINDEX PVideoInputDevice::GetMaxFrameBytes()
 198 {
 199   return 0;
 200 }
 201
 202
 203
 204 BOOL PVideoInputDevice::GetFrameData(BYTE * buffer, PINDEX * bytesReturned)
 205 {
 206   return FALSE;
 207 }
 208
 209
 210 BOOL PVideoInputDevice::GetFrameDataNoDelay(BYTE * buffer, PINDEX * bytesReturned)
 211 {
 212   return FALSE;
 213 }
 214
 215
 216 void PVideoInputDevice::ClearMapping()
 217 {
 218 }
 219
 220 BOOL PVideoInputDevice::VerifyHardwareFrameSize(unsigned width,
 221                                                 unsigned height)
 222 {
 223         // Assume the size is valid
 224         return TRUE;
 225 }
 226
 227 BOOL PVideoInputDevice::TestAllFormats()
 228 {
 229   return TRUE;
 230 }
 231
 232 // End Of File ///////////////////////////////////////////////////////////////