git.sesse.net Git - vlc/blob - modules/access/dshow/crossbar.cpp

   1 /*****************************************************************************
   2  * crossbar.c : DirectShow access module for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2002, 2004, 2009 the VideoLAN team
   5  * $Id$
   6  *
   7  * Author: Damien Fouilleul <damien dot fouilleul at laposte dot net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33
  34 #ifndef _MSC_VER
  35     /* Work-around a bug in w32api-2.5 */
  36 #   define QACONTAINERFLAGS QACONTAINERFLAGS_ANOTHERSOMETHINGELSE
  37 #endif
  38
  39 #include "common.h"
  40
  41
  42
  43 // Helper function to associate a crossbar pin name with the type.
  44 static const char * GetPhysicalPinName(long lType)
  45 {
  46     switch (lType)
  47     {
  48     case PhysConn_Video_Tuner:            return "Video Tuner";
  49     case PhysConn_Video_Composite:        return "Video Composite";
  50     case PhysConn_Video_SVideo:           return "S-Video";
  51     case PhysConn_Video_RGB:              return "Video RGB";
  52     case PhysConn_Video_YRYBY:            return "Video YRYBY";
  53     case PhysConn_Video_SerialDigital:    return "Video Serial Digital";
  54     case PhysConn_Video_ParallelDigital:  return "Video Parallel Digital";
  55     case PhysConn_Video_SCSI:             return "Video SCSI";
  56     case PhysConn_Video_AUX:              return "Video AUX";
  57     case PhysConn_Video_1394:             return "Video 1394";
  58     case PhysConn_Video_USB:              return "Video USB";
  59     case PhysConn_Video_VideoDecoder:     return "Video Decoder";
  60     case PhysConn_Video_VideoEncoder:     return "Video Encoder";
  61
  62     case PhysConn_Audio_Tuner:            return "Audio Tuner";
  63     case PhysConn_Audio_Line:             return "Audio Line";
  64     case PhysConn_Audio_Mic:              return "Audio Microphone";
  65     case PhysConn_Audio_AESDigital:       return "Audio AES/EBU Digital";
  66     case PhysConn_Audio_SPDIFDigital:     return "Audio S/PDIF";
  67     case PhysConn_Audio_SCSI:             return "Audio SCSI";
  68     case PhysConn_Audio_AUX:              return "Audio AUX";
  69     case PhysConn_Audio_1394:             return "Audio 1394";
  70     case PhysConn_Audio_USB:              return "Audio USB";
  71     case PhysConn_Audio_AudioDecoder:     return "Audio Decoder";
  72
  73     default:                              return "Unknown Type";
  74     }
  75 }
  76 /*****************************************************************************
  77  * DeleteCrossbarRoutes
  78  *****************************************************************************/
  79 void DeleteCrossbarRoutes( access_sys_t *p_sys )
  80 {
  81     /* Remove crossbar filters from graph */
  82     for( int i = 0; i < p_sys->i_crossbar_route_depth; i++ )
  83     {
  84         p_sys->crossbar_routes[i].pXbar->Release();
  85     }
  86     p_sys->i_crossbar_route_depth = 0;
  87 }
  88
  89 /*****************************************************************************
  90  * RouteCrossbars (Does not AddRef the returned *Pin)
  91  *****************************************************************************/
  92 static HRESULT GetCrossbarIPinAtIndex( IAMCrossbar *pXbar, LONG PinIndex,
  93                                        BOOL IsInputPin, IPin ** ppPin )
  94 {
  95     LONG         cntInPins, cntOutPins;
  96     IPin        *pP = NULL;
  97     IBaseFilter *pFilter = NULL;
  98     IEnumPins   *pins = NULL;
  99     ULONG        n;
 100
 101     if( !pXbar || !ppPin ) return E_POINTER;
 102
 103     *ppPin = 0;
 104
 105     if( S_OK != pXbar->get_PinCounts(&cntOutPins, &cntInPins) ) return E_FAIL;
 106
 107     LONG TrueIndex = IsInputPin ? PinIndex : PinIndex + cntInPins;
 108
 109     if( pXbar->QueryInterface(IID_IBaseFilter, (void **)&pFilter) == S_OK )
 110     {
 111         if( SUCCEEDED(pFilter->EnumPins(&pins)) )
 112         {
 113             LONG i = 0;
 114             while( pins->Next(1, &pP, &n) == S_OK )
 115             {
 116                 pP->Release();
 117                 if( i == TrueIndex )
 118                 {
 119                     *ppPin = pP;
 120                     break;
 121                 }
 122                 i++;
 123             }
 124             pins->Release();
 125         }
 126         pFilter->Release();
 127     }
 128
 129     return *ppPin ? S_OK : E_FAIL;
 130 }
 131
 132 /*****************************************************************************
 133  * GetCrossbarIndexFromIPin: Find corresponding index of an IPin on a crossbar
 134  *****************************************************************************/
 135 static HRESULT GetCrossbarIndexFromIPin( IAMCrossbar * pXbar, LONG * PinIndex,
 136                                          BOOL IsInputPin, IPin * pPin )
 137 {
 138     LONG         cntInPins, cntOutPins;
 139     IPin        *pP = NULL;
 140     IBaseFilter *pFilter = NULL;
 141     IEnumPins   *pins = NULL;
 142     ULONG        n;
 143     BOOL         fOK = FALSE;
 144
 145     if(!pXbar || !PinIndex || !pPin )
 146         return E_POINTER;
 147
 148     if( S_OK != pXbar->get_PinCounts(&cntOutPins, &cntInPins) )
 149         return E_FAIL;
 150
 151     if( pXbar->QueryInterface(IID_IBaseFilter, (void **)&pFilter) == S_OK )
 152     {
 153         if( SUCCEEDED(pFilter->EnumPins(&pins)) )
 154         {
 155             LONG i=0;
 156
 157             while( pins->Next(1, &pP, &n) == S_OK )
 158             {
 159                 pP->Release();
 160                 if( pPin == pP )
 161                 {
 162                     *PinIndex = IsInputPin ? i : i - cntInPins;
 163                     fOK = TRUE;
 164                     break;
 165                 }
 166                 i++;
 167             }
 168             pins->Release();
 169         }
 170         pFilter->Release();
 171     }
 172
 173     return fOK ? S_OK : E_FAIL;
 174 }
 175
 176 /*****************************************************************************
 177  * FindCrossbarRoutes
 178  *****************************************************************************/
 179 HRESULT FindCrossbarRoutes( vlc_object_t *p_this, access_sys_t *p_sys,
 180                             IPin *p_input_pin, LONG physicalType, int depth )
 181 {
 182     HRESULT result = S_FALSE;
 183
 184     IPin *p_output_pin;
 185     if( FAILED(p_input_pin->ConnectedTo(&p_output_pin)) ) return S_FALSE;
 186
 187     // It is connected, so now find out if the filter supports IAMCrossbar
 188     PIN_INFO pinInfo;
 189     if( FAILED(p_output_pin->QueryPinInfo(&pinInfo)) ||
 190         PINDIR_OUTPUT != pinInfo.dir )
 191     {
 192         p_output_pin->Release ();
 193         return S_FALSE;
 194     }
 195
 196     IAMCrossbar *pXbar = NULL;
 197     if( FAILED(pinInfo.pFilter->QueryInterface(IID_IAMCrossbar,
 198                                                (void **)&pXbar)) )
 199     {
 200         pinInfo.pFilter->Release();
 201         p_output_pin->Release ();
 202         return S_FALSE;
 203     }
 204
 205     LONG inputPinCount, outputPinCount;
 206     if( FAILED(pXbar->get_PinCounts(&outputPinCount, &inputPinCount)) )
 207     {
 208         pXbar->Release();
 209         pinInfo.pFilter->Release();
 210         p_output_pin->Release ();
 211         return S_FALSE;
 212     }
 213
 214     LONG inputPinIndexRelated, outputPinIndexRelated;
 215     LONG inputPinPhysicalType = 0, outputPinPhysicalType;
 216     LONG inputPinIndex = 0, outputPinIndex;
 217     if( FAILED(GetCrossbarIndexFromIPin( pXbar, &outputPinIndex,
 218                                          FALSE, p_output_pin )) ||
 219         FAILED(pXbar->get_CrossbarPinInfo( FALSE, outputPinIndex,
 220                                            &outputPinIndexRelated,
 221                                            &outputPinPhysicalType )) )
 222     {
 223         pXbar->Release();
 224         pinInfo.pFilter->Release();
 225         p_output_pin->Release ();
 226         return S_FALSE;
 227     }
 228
 229     /*
 230     ** if physical type is 0, then use default/existing route to physical connector
 231     */
 232     if( physicalType == 0 )
 233     {
 234         /* use following as default connector type if we fail to find an existing route */
 235         physicalType = PhysConn_Video_Tuner;
 236         if( SUCCEEDED(pXbar->get_IsRoutedTo(outputPinIndex, &inputPinIndex)) )
 237         {
 238
 239             if( SUCCEEDED( pXbar->get_CrossbarPinInfo( TRUE,  inputPinIndex,
 240                            &inputPinIndexRelated, &inputPinPhysicalType )) )
 241             {
 242                 // remember connector type
 243                 physicalType = inputPinPhysicalType;
 244
 245                 msg_Dbg( p_this, "found existing route for output %ld (type %s) to input %ld (type %s)",
 246                          outputPinIndex, GetPhysicalPinName( outputPinPhysicalType ),
 247                          inputPinIndex, GetPhysicalPinName( inputPinPhysicalType ) );
 248
 249                 // fall through to for loop, note 'inputPinIndex' is set to the pin we are looking for
 250                 // hence, loop iteration should not wind back
 251
 252             }
 253         }
 254         else {
 255             // reset to first pin for complete loop iteration
 256             inputPinIndex = 0;
 257         }
 258     }
 259
 260     //
 261     // for all input pins
 262     //
 263     for( /* inputPinIndex has been set */ ; (S_OK != result) && (inputPinIndex < inputPinCount); ++inputPinIndex )
 264     {
 265         if( FAILED(pXbar->get_CrossbarPinInfo( TRUE,  inputPinIndex,
 266             &inputPinIndexRelated, &inputPinPhysicalType )) ) continue;
 267
 268         // Is this pin matching required connector physical type?
 269         if( inputPinPhysicalType != physicalType ) continue;
 270
 271         // Can we route it?
 272         if( FAILED(pXbar->CanRoute(outputPinIndex, inputPinIndex)) ) continue;
 273
 274
 275         IPin *pPin;
 276         if( FAILED(GetCrossbarIPinAtIndex( pXbar, inputPinIndex,
 277                                            TRUE, &pPin)) ) continue;
 278
 279         result = FindCrossbarRoutes( p_this, p_sys, pPin,
 280                                      physicalType, depth+1 );
 281
 282         if( S_OK == result || (S_FALSE == result &&
 283             physicalType == inputPinPhysicalType &&
 284             (p_sys->i_crossbar_route_depth = depth+1) < MAX_CROSSBAR_DEPTH) )
 285         {
 286             // hold on crossbar, will be released when graph is destroyed
 287             pXbar->AddRef();
 288
 289             // remember crossbar route
 290             p_sys->crossbar_routes[depth].pXbar = pXbar;
 291             p_sys->crossbar_routes[depth].VideoInputIndex = inputPinIndex;
 292             p_sys->crossbar_routes[depth].VideoOutputIndex = outputPinIndex;
 293             p_sys->crossbar_routes[depth].AudioInputIndex = inputPinIndexRelated;
 294             p_sys->crossbar_routes[depth].AudioOutputIndex = outputPinIndexRelated;
 295
 296             msg_Dbg( p_this, "crossbar at depth %d, found route for "
 297                      "output %ld (type %s) to input %ld (type %s)", depth,
 298                      outputPinIndex, GetPhysicalPinName( outputPinPhysicalType ),
 299                      inputPinIndex, GetPhysicalPinName( inputPinPhysicalType ) );
 300
 301             result = S_OK;
 302         }
 303     }
 304
 305     pXbar->Release();
 306     pinInfo.pFilter->Release();
 307     p_output_pin->Release ();
 308
 309     return result;
 310 }